CN1144474A

CN1144474A - Sanitary napkin with expandable flaps

Info

Publication number: CN1144474A
Application number: CN 95192322
Authority: CN
Inventors: 托玛斯·W·奥伯恩Iii; 克里斯蒂·A·奥尔森; 莱瑟·M·海恩斯; 彼得·D·凡特拉; 布鲁斯·W·拉瓦什; 艾尔玛·K·林曼; 米歇尔·A·曼斯菲尔德
Original assignee: Procter and Gamble Co
Current assignee: Procter and Gamble Co
Priority date: 1994-02-04
Filing date: 1995-02-06
Publication date: 1997-03-05
Also published as: AU1700195A; MX9603185A; WO1995020932A1; JPH09508548A; EP0742705A1; AU702048B2; CA2182571C; BR9506713A; CA2182571A1

Abstract

Absorbent articles, such as sanitary napkins, pantiliners, or incontinence pads are described that comprise a pair of side extensions for folding around the side edges of a wearer's undergarment. The side extensions are joined to the main body portion and extend laterally outward beyond the longitudinal side edges of the main body portion. The side extensions can be provided on sanitary napkins that are either extensible or inextensible.

Description

The sanitary towel that has expandable flaps

The present invention relates to as absorbent devices such as sanitary towel, short underpants lining and incontinence pads, more particularly, the present invention relates to the absorbent device that sanitary towel etc. has improved flank or gusset spare configuration.

The articles for use of crotch area in normally the women is worn on as absorbent devices such as sanitary towel's short underpants lining and incontinence pads.These articles for use can be used for Excreta in absorption and retain liquid and other body, to prevent make dirty health and medicated clothing.Sanitary towel is worn on a kind of absorbent device in the medicated underpants by the women, and the wearer is positioned between two thighs perineal region near health with it usually.

As everyone knows, the configuration that is used for the absorbent device of absorb body fluids (as menstruation, urine and feces) can be various.Absorbent device (especially sanitary towel) with flank or flap is open in the literature, and can buy on market.

In general, from the flap of center moisture-absorbent member transverse extension can be in the crotch district along wearer's underwear edge fold, therefore, flap is placed between the underwear edge of wearer in the crotch district and wearer's two thighs.Usually, flap is provided with the fixture that is used for flap is fixed to wearer's underwear downside.

In general, present commercially available above-mentioned all kinds of disposable absorbent articles are still with non-retractable material and make.That is to say not flexibles of material and articles for use itself under the effect of the power that absorbent device normally is subjected to when wearing.But, recently people make great efforts to provide always can improve comfortableness and with wearer's health and the suitable tensile absorbent device of underwear.The applying date is that the PCT application publication number 93/01785 on July 23rd, 1992 and its corresponding U. S. application serial number 07/915133 (the application is the continuation application of this application) disclose tensile absorbent device.

But, have now found that, when the wearer attempts the flank of the tensile absorbent device of this class flattened, more particularly, when making the flap of this class absorbent device have definite shape for the lateral margin of degree of tightness is arranged the major part that covers wearer's short underpants, produced specific question.Some problem wherein exists when flattening flap using the common absorbent device that can not extend too.Therefore, the research to the parts that improve this class absorbent device is continuing always.

So; absorbent devices such as sanitary towel are proposed a kind of requirement; the absorbent device that promptly has the side direction guard member of having improved; above-mentioned guard member is applicable to tensile or general not extending product; it can be superimposed preferably around wearer's underwear, and use, make, pack and carry convenient.

Therefore; purpose of the present invention provides a kind of absorbent device (as sanitary towel); it has the side direction guard member of having improved; this guard member is applicable to tensile or general not extending product; it can be superimposed preferably around wearer's underwear, and use, make, pack and carry convenient.

By following description also in conjunction with the accompanying drawings, above-mentioned purpose of the present invention and other purpose are more apparent.

The invention provides a kind of absorbent device, as sanitary towel, pantiliner or incontinence pad etc.There are a main longitudinal centre line and a main cross central line in this sanitary towel.This sanitary towel comprises a main part, and this part is made up of top flat, egative film and absorbent article core.Aforementioned body partly comprises one first petiolarea, second petiolarea (or " second district "), and the center between above-mentioned two petiolareas.First petiolarea and center can be regarded as first district of sanitary towel.In a preferred embodiment, sanitary towel is an asymmetry, to such an extent as to second petiolarea is greater than first petiolarea.The wearer preferably is placed on second petiolarea back of wearer's body in wearing sanitary towel.

Sanitary towel of the present invention comprises a pair of along the folding lateral elongation spare of the lateral edges of wearer's short underpants.Above-mentioned lateral elongation spare can be gusset spare (or " medicated underpants cover part ") or flank, in sanitary towel is placed on wearer's medicated underpants and wearer when medicated underpants is drawn up, above-mentioned gusset spare preferably can originate from moving folding along the elastic sides of wearer's short underpants, and above-mentioned flank can be used to encase medicated underpants by the wearer.Lateral elongation spare links to each other with main part, along laterally outwardly extending the vertical side of the edge that exceeds main part.This lateral elongation spare was both configurable in tensile sanitary towel, and was also configurable in not extending sanitary towel.Be configured with various improved lateral elongation spares in this sanitary towel.In a preferred embodiment, above-mentioned lateral elongation spare links to each other towards the underwear side with main part, comprises first district and second district.It is laterally inboard that first district is located substantially on the main part vertical side of the edge, and it can longitudinally extend usually.When this flap elongation, above-mentioned second district is positioned at the outside of vertical side of the edge at least in part, and usually along transverse extension.

In the foregoing description or another embodiment, above-mentioned lateral elongation spare can have second parts.Above-mentioned lateral elongation spare links to each other and main longitudinal centre line from this junction towards sanitary towel extends towards the underwear side vertical junction and main part.Lateral elongation spare with above-mentioned second parts is folded inverted to form folded part on fold line.Lateral elongation spare is folding, thus its edge far away laterally outwardly extends from main longitudinal centre line.Above-mentioned lateral elongation spare not by fold line be fixed on main part towards the short underpants side, thereby when the power that applies was laterally outwardly drawn lateral elongation spare, the folded part of lateral elongation spare can launch and along horizontal expansion.

In the 3rd embodiment, lateral elongation spare comprises two zones of extensibility at least, and wherein at least one zones of extensibility is positioned at the vertical side of the edge of each side and the contiguous main part of lateral elongation spare cross central line.Above-mentioned some zones of extensibility have extensibility in different directions, thereby the extensibility of at least one zones of extensibility is opposite to small part with the extensibility of another zones of extensibility at least, therefore, the general extension of this lateral elongation spare is less than the elongation sum of tensile not same district.

Sanitary towel of the present invention also can have many other parts, and is more convenient when these parts can improve stability, raising production capacity or use.For example, can open narrow slit, but the edgewise edge is not opened narrow slit to reduce excremental leakage and to improve the stability of sanitary towel in the center of absorbent article core.In another embodiment, described some parts of lateral elongation spare, these parts make has not that the lateral elongation spare of zones of extensibility links to each other effectively with the sanitary towel with tensile main part.

Though the application has specifically proposed to be considered to constitute every claim of flesh and blood of the present invention, can more be expressly understood the present invention by description below in conjunction with accompanying drawing, wherein:

Fig. 1 is the top view of an embodiment with sanitary towel of tensile main part.

Fig. 2 is the side elevation view of sanitary towel shown in Figure 1.

The cross sectional view of the signal that Fig. 3 cuts open along the 3-3 line for sanitary towel shown in Figure 1.

Fig. 4 is the bottom view of the sanitary towel shown in Figure 1 behind the separate paper that tears from the bonding agent of egative film.

Fig. 5 is the perspective view of the shape in use of sanitary towel shown in Fig. 1-4.

Fig. 6 is the simplified plan view than the extensibility of the sanitary towel of Common Shape with extensible member.

Fig. 7 is the preferred relation table of asking of sanitary towel's elongation of producing with this power of response of size that expression acts on the tensile force in the sanitary towel.

Fig. 8 is the plane graph of a preferred embodiment with polymer wadding net tablet of deformable net structure (illustrated be towards the observer distortion).

Fig. 9 is the fragment perspective of polymer wadding net tablet under unstretched condition of key diagram 8.

Figure 10 is that the polymer wadding net tablet of key diagram 8 is corresponding to the fragment perspective under the extended state of the section I on the power-extension curve among Figure 12.

Figure 11 is that the polymer of key diagram 8 is wadded a quilt with cotton the net tablet corresponding to the fragment perspective under the extended state of the section II on the power-extension curve among Figure 12.

Figure 12 is resistance-extension curve figure, and the wadding of the deformable shown in Fig. 8 net tablet is compared with identical, the plane matrix polymer wadding of a kind of other character net tablet.

Figure 13 is with mode that extensibility the is provided amplification view with top flat and egative film mechanical bond zone together.

Figure 14 is the plane graph that is fixed in the sanitary towel the crescent wadding net of distortion of one of gusset spare of forming gauffer.

Figure 15 has the plane graph that can be fixed on the health another kind wadding net tablet with cross section that the ring ingot rolls that forms one of gusset spare.

Figure 16 is the top view of a preferred embodiment of sanitary towel of the present invention, the lateral elongation spare of this sanitary towel has first district that can longitudinally extend and common second district along transverse extension (for clarity sake, only showing a part of decorative pattern that forms egative film and lateral elongation spare).

Figure 17 is the end-view of sanitary towel shown in Figure 16.

Figure 18 is the bottom view of sanitary towel shown in Figure 16.

Figure 19 is the bottom view that can add the signal of some optional members in sanitary towel of the present invention.

Figure 19 A has only the longitudinal center district of egative film to have the bottom plan view of another sanitary towel of deformable forming net structure sheet.

Figure 20 is the bottom view of a part of sanitary towel with lateral elongation spare of band tab shape distal edge.

Figure 21 is the top view with sanitary towel of the lateral elongation spare of arranging with another kind of collapsed shape (a lateral elongation spare only is shown).

Figure 22 is the end-view of sanitary towel shown in Figure 21, and two lateral elongation spares are shown.

Figure 23 A illustrates the bottom view of the part of sanitary towel, and there is the lateral elongation spare with another kind of tab in this sanitary towel.

Figure 23 is the end-view of the part of sanitary towel shown in Figure 23, and lateral elongation spare wherein and tab are folded before use.

Figure 23 B is the end-view of the part of sanitary towel shown in Figure 23, and lateral elongation spare wherein is in a kind of possible use shape.

Figure 24 is the bottom view of sanitary towel's part, and there is a lateral elongation spare with the marker space of some extensible member in this sanitary towel, and the prolonging direction in above-mentioned several districts is opposite, so the general extension of lateral elongation spare is less than the elongation sum of above-mentioned zones of extensibility.

Figure 24 A is the bottom view of the part of sanitary towel, and there is a lateral elongation spare with some Argyle narrow slits in this sanitary towel.

Figure 25 is the bottom plan view of the part of another kind of sanitary towel, and there is a lateral elongation spare that is provided with loose tablet or unnecessary tablet along its distal edge in this sanitary towel.

When Figure 26 shows sanitary towel is set level on plane (for example desktop), the side view of sanitary towel shown in Figure 25 distal edge.

Figure 27 is the perspective view of cantilever gauffer testing machine (Cantilever Drape Tester).

1, the overall characteristic of absorbent device

Fig. 1-5 shows a preferred embodiment of disposable absorbent article of the present invention (20)." absorbent device " speech of using in this description is meant the articles for use that absorb and retain body excretions, and more particularly, this speech is meant in order to absorb and to retain the various Excretas of discharging from human body and be placed on or near the articles for use of wearer's body." absorbent device " speech can comprise sanitary towel's panty-liners and incontinence pad (being worn on the articles for use of interior crotch area with other)." disposable " speech is meant that use once promptly throws away, and preferably reclaims to become compost or adopt other mode that conforms to environmental regulation to handle.(that is to say, do not plan they are washed or preserve or make absorbent device and reuse.) in cited embodiment, absorbent device is the sanitary towel with 20 representatives.

Used " sanitary towel " speech is meant that the women is used for absorbing and retaining the various Excretas (as blood, menstruation and urine) of discharging from health near being worn on external genital in this description.But, be also pointed out that the present invention also is applicable to other women sanitary articles or menopad such as scanties lining or other absorbent devices such as incontinence pad etc.

There are two faces in sanitary towel 20, promptly a saturating liquid and face Body contact or " health face " 20A and a liquid-tight underwear face 20B.Sanitary towel 20 shown in Figure 1 is observed from health face 20A.Health face 20A will press close to wearer's health and dress.The underwear face 20B (as shown in Figure 2) of sanitary towel 20 is positioned at reverse side, and when dressing sanitary towel 20, this face will be placed near wearer's underwear.

There are two centrages in sanitary towel 20, i.e. a main longitudinal centre line L and a main transverse centerline." vertically " speech is meant in this manual when sanitary towel dresses, and is divided into line, axle or direction on the plane of the aligned sanitary towel 20 of vertical plane of left side and right-hand part with the wearer's who will stand health." horizontal " or " level " can exchange herein, refers to usually and line, axle or direction in vertical vertical sanitary towel 20 planes.There is a lateral dimension that moves towards along the principal direction of main transverse centerline along longitudinal size and (shorter usually) of the principal direction trend of main longitudinal centre line L in sanitary towel 20.

As shown in Figure 1, sanitary towel 20 have one with two longitudinal edges that separate 22, two separate laterally or the main part 21 in 24 and four bights 27 of end margin (or end), above-mentioned longitudinal edge 22, end margin 24 and bight 27 constitute the periphery 26 of the main part 21 of sanitary towel 20 together.Main part 21 also has two petiolareas that are called as first petiolarea 28 and second petiolarea 30.A center 32 is between above-mentioned two ends 28 and 30.32 edge stretches out about 1/8 to 1/3 of main part length outwardly to

petiolarea

28 and 30 from the center.The United States Patent (USP) that was issued to Higgins on the 1st JIUYUE in 1987 discloses the details of this center 32 and two

petiolareas

28 and 30 for No. 4690680.Sanitary towel 20 has one along the longitudinal center district 23 that is provided with on the partial-length at least of main longitudinal centre line L (preferably near the longitudinal centre line center).

The thickness of sanitary towel 20 (or its main part) can choose at random, and it can be quite thick, quite thin or even very thin.The embodiment of the sanitary towel 20 shown in Fig. 1-3 is quite thin sanitary towel's examples (thickness of sanitary towel is less than or equal to about 5mm, and preferred thickness is for being less than or equal to 4mm), preferably a kind of ultrathin sanitary towel.But when observing these accompanying drawings, the number of plies of shown tablet makes sanitary towel 20 look much thicker than actual (real) thickness.The preferred thickness of the ultrathin sanitary towel 20 described in the United States Patent (USP) 4950264 and 5009653 that is issued to Osborn is approximately less than 3mm.Shown slim sanitary towel 20 preferably also should be submissiveer, and the wearer is felt comfortably cool.

In some other embodiment, massif or structure that the longitudinal center district 23 of sanitary towel 20 can have moisture absorption protuberance or some other type make the part of sanitary towel thicker, and surrounding zone 25 are thinner.The thickness of surrounding zone (especially petiolarea) preferably is less than or equal to the thickness of above-mentioned slim sanitary towel.Though the longitudinal center district 23 shown in Fig. 1 is along the strip of sanitary towel's length elongation, is not difficult to expect that above-mentioned massif and longitudinal center district 23 can be some other shape.

Surrounding zone 25 is important absorbent portion of sanitary towel, and it is positioned at the outside in longitudinal center district 23." outside " speech refers to the position away from the intersection point part of main longitudinal centre line L and transverse centerline.Surrounding zone 25 can be called as " vertically lateral areas " (or lateral areas) 25, because they are positioned at the lateral outer side of massif usually at least, so that they are the vertical both sides (so being called " vertically lateral areas ") in massif and sanitary towel.But surrounding zone 25 both can longitudinally be positioned at the outside (promptly outside the two ends of the massif of petiolarea 28 and 30) in longitudinal center district 23, also can be along laterally or longitudinally and laterally be positioned at the outside in longitudinal center district 23.

Fig. 3 shows some individual components of sanitary towel 20 of the present invention.Sanitary towel shown in Figure 3 generally comprises three critical pieces at least, promptly saturating liquid top flat 38, liquid-tight egative film 40 and the absorbent article core 42 between top flat 38 and egative film 40.Preferred embodiment shown in Fig. 1-3 also comprise be positioned at least in part that center 32 response is stretched and skew be difficult for elongate member 44 (best protuberance is so that improve and the contacting of health).

This sanitary towel can be included in the several basic elements of character described in PCT publication number WO93/01785 and 93/01786, preferably includes one or more extendable members, more preferably comprise all extendable members (eliminating is difficult for elongate member), thereby it has extensibility completely.Fig. 6 shows the extensibility of sanitary towel 20 in simplified form." tensile (extensible) " speech referred to herein as on the x-y plane the increasable absorbent device of one dimension size at least.The x-y plane normally is parallel to the plane on two surfaces of sanitary towel 20." tensile " but a speech comprises extensile and absorbent device elastic stretch (below will define).Sanitary towel 20 shown in Fig. 1-5 be preferably in long and cross direction all extending.In some most preferred embodiment, sanitary towel 20 all directions in the x-y plane are all extending.Certainly, in some other embodiment, sanitary towel 20 can not extend substantially, or only extending on a direction of these directions, or extending on a certain direction between the vertical and horizontal.Sanitary towel 20 is preferably at least longitudinally extending.

Sanitary towel 20 in some preferred embodiments is except that extending, and is also extensible." extensile (stretchable) " speech is meant when stretching force acts on absorbent device herein, and is tensile and the articles for use that stretch resistance can be provided.More preferably, but sanitary towel 20 can be an elastic stretch." but elastic stretch " or " but elastic elongation " is synonym.The implication of these speech used herein is when stretching force is removed, and sanitary towel tends to return to the state that it does not extend or do not stretch (or original dimension).Certainly, sanitary towel 20 is returned on its size that does not stretch fully.As shown in Figure 6, it also can only get back to not the loose size between the stretched dimensions and elongation (or stretched dimensions) Ls and Ws (as L _RAnd W _R) on.But make sanitary towel's elastic stretch will reduce not wish that when removing power that sanitary towel is stretched when shrinking (as the person's of wearing short underpants) sanitary towel that occurs longitudinally gathers (vertically assemble and become many puddles state) inwardly.

The embodiment of the sanitary towel 20 shown in Fig. 1-5 preferably presses the numerical value elongation of describing in PCT publication number WO93/01785 and WO93/01786 number.In brief, under the effect of the power that is worn on sanitary towel in the medicated underpants to be produced, sanitary towel preferably extends about 5% to being less than about 50%, more preferably about 10% to about 40%, most preferably is about 25% to about 40%.Make sanitary towel preferably at about 50-100g to the power effect of about 1000-1500g, be more preferably at about 250g and extremely will produce above-mentioned elongation under the power effect of about 800g.Other preferred elongation is listed in the table 1 (Fig. 7).Sanitary towel of the present invention also can be arranged on any other parts described in the above-mentioned publication, comprises " power barrier " structure is set, and when not increasing basically with the value that prevents the power on affacting sanitary towel, elongation surpasses certain value.

In addition, in these some especially preferred embodiment that describe in detail very much in bright, the elongation of the sanitary towel 20 among a lot of embodiment under the effect of the power (as the power in the scope at about 100-200g) of the lower end of above-mentioned wide region is all less.For example, in such some embodiment, sanitary towel preferably extends approximately 2.5% under the effect of 100g power, more preferably extends about 3%; Preferred elongation is about 5% under the effect of 200g power, more preferably extends about 7.5%.Under the effect of little power, have in the absorbent device of little elongation like this, the power barrier can occur down at low elongation (for example about 5% percentage elongation), but under up to about 50% percentage elongation, also the power barrier can occur.

In addition, in some embodiment of tensile sanitary towel of the present invention (or other absorbent device), preferably in the identical masterpiece time spent that is subjected to being subjected to wearer's short underpants (or other underwear), the elongation of sanitary towel at least should be identical with the elongation of short underpants, thereby, during wearing, the elongation of short underpants may command sanitary towel.Change bag and talk about, the elastic modelling quantity of sanitary towel is preferably approaching, be less than or equal to the elastic modelling quantity that the inside is placed with the short underpants of sanitary towel.For example, if make short underpants extend about 5% (or about 10%) need to add a power, the power that sanitary towel's (being the main part of sanitary towel) elongation same amount is needed is less than or equal to 1.2 times of the power that makes the corresponding elongation of above-mentioned short underpants, preferably is less than or equal to 1 times.Make typical formula women short underpants crotch district, North America (at the narrowest place of underwear) the required power of transverse extension be about 135g/cm.Make back lining section (second petiolarea of sanitary towel may be positioned at herein) the required power of longitudinal tensile strain of these short underpants be about 165g/cm.Make the required power of medicated underpants degree of tightness mouth (panty elastics) elongation of North America bafta short underpants be about the 135g/ inch usually.The elastic force of the short underpants of other type or medicated underpants elongation can be higher slightly.The main part of sanitary towel of the present invention preferably can just can be made under those power effects of sanitary towel elongation extending by user with hands, so that do not have to make under the distored situation hygroscopic surface area of sanitary towel to increase at least about 5% in main part.

Should note relevant sanitary towel other several problems of elongation performance.So-called herein elongation performance is different from the simple gauffer or the expansion of absorbent device, also is different from because elasticity (or other means) becomes stretching of curved product, elongatedly is considered to not relate to the elongation of absorbent device on the x-y plane by what these effects caused.In addition, the absorbent device with extending part or district and relative not extending part or district also within the scope of the invention.Should be noted that, if the performance parameter of these parts of absorbent device drops on this and illustrates in concrete restricted portion and the ultimate value, then above-mentioned scope or ultimate value equally only are applicable to the suitable part of absorbent device, in the claims these scopes and the limit are described.

Sanitary towel of the present invention (or absorbent device of other type) preferably have as the applying date be on February 4th, 1994, the application people is called other characteristic described in the application (serial number does not also provide) that continues that the U.S. Patent application serial number 08/192240 of " Absorbent Articles " and the applying date be the above-mentioned application of 2 purposes in February nineteen ninety-five for people's such as Osbom name, with above-mentioned two pieces of documents introducing the present invention as a reference.Above-mentioned other characteristic includes, but is not limited to: the size and dimension of absorbent device, with the contacting of health (as protuberance), area coverage, drapability and compliance, to the response performance of compression stress and resilience, wet nerve, test capacity and the total capacity of gathering.Certainly, this sanitary towel can also have the various characteristics described in the absorbent device of introducing in the present invention's patent as a reference.

The discrete parts of 2 sanitary towels and assembling thereof

Below with reference to a preferred embodiment shown in Fig. 1-3, describe the discrete parts of each embodiment that is applicable to sanitary towel 20 of the present invention in detail.

The A top flat

Top flat 38 is first saturating liquid parts.When using sanitary towel 20, top flat 38 is pressed close to wearer's skin.According to the type of the absorbent device that uses, top flat 38 can be tensile or not extending.The top flat of using among the embodiment shown in Fig. 1-5 38 is preferably tensile, but is more preferably elastic elongation, and submissive, soft feel, as far as possible wearer's skin had no stimulation.Top flat 38 also should have good liquid permeability, can reduce moistly again, so that slop can rapid permeability and flow to absorbent article core 42, and does not allow Excreta to be back on the wearer's skin by top flat 38 again.

Top flat 38 has both sides (or face or surface), promptly towards bodyside 38A with towards underwear side (or towards absorbent article core side) 38B.Top flat 38 constitute the part of sanitary towel 20 and human body contact surface (" surface ") 20A usually at least towards bodyside 38A.Top flat 38 has two longitudinal edge 38C and two end margin 38D.(other parts of sanitary towel also adopt similar label system, be representing with this parts label and letter " A " of parts towards the wearer's body side, it is represented with this parts label and letter " B " towards wearer's underwear side, and lateral margin and ora terminalis are used this parts label and letter " C " and " D " representative respectively.)

The material that is suitable for making top flat 38 is very extensive, and these materials include, but is not limited to: textile material and non-woven material, porous formed thermoplastic film, plastic film, hydroforming thin film, perforated foams, reticulated foam, netted thermoplastic film and thermoplasticity woven scrim.Suitable weaving and non-woven material can comprise the natural fiber (as polymer fibers such as polyester, polypropylene fibre, polyethylene or polyvinyl alcohol, starch base ester, polyurethane, cellulose esters, nylon and staple fibres) of natural fabric (as wood fibre or cotton fiber), synthetic fibers or modification, or the fiber of being made up of natural fiber and synthetic fibers.When top flat 38 was a kind of nonwoven wadding net tablet, this tablet can be with spunbond, combing, wet-laying, moltenly blow, hydraulic pressure tangles and the combination or the similar approach of said method process.

Usually preferably make top flat 38 with porous membrane, because the perforated membrane liquid permeable, if form the probability that suitable hole can also be reduced liquid return and reduced rewetting user skin.Below patent documentation suitable porous membrane has been described, they are: the United States Patent (USP) that is issued to people such as Radel No. 4324426, the United States Patent (USP), the August 3 nineteen eighty-two that are issued to people such as Mullane on No. 3929135, United States Patent (USP), April 13 nineteen eighty-two that December in 1975 was issued to Thompson on the 30th was issued to people's such as Ahr No. 4463045, United States Patent (USP) and was issued to No. 5006394, the United States Patent (USP) of Baird on April 9th, 1991 on July 31st, No. 4342314 1.A kind of particularly suitable top flat 38 is to make for No. 4463045 according to No. 4342314, United States Patent (USP) that is issued to people such as Radel and the United States Patent (USP) that is issued to people such as Ahr.Found that the top flat 38 that a kind of porous formed film of being sold by the Tredegar Corporation of Terre Haute of Indiana (state of Indiana) with trade mark X-3265 or trade mark P1552 is made has good serviceability.

Can top flat 38 be made tensilely by machining (for example pleating on top sheet materials, wrinkling or ring ingot roll), on top flat, form extensible fold when being subjected to stretching with convenient top flat.Such method can be applied on the above-mentioned multiple top sheet materials.In a preferred embodiment of the invention, top flat 38 makes for No. 4463045 according to United States Patent (USP), rolls through the ring ingot then, makes it to have certain longitudinal tensile strain degree.In the name of on August 25th, 1992 application is called the U.S. Patent application serial number 07/936195 of " PolymericWeb Having Deformed Sections Which Provide a Substantially Increased ElasticityTo The Web ", this class top flat has been described by people such as John J.Cunrro.

Following patent literature has been described and has been used to encircle that ingot rolls or the appropriate process of " wrinkling in advance ", and these documents are: the United States Patent (USP) that was issued to Sisson on August 15th, 1978 was issued to United States Patent (USP) that No. 4834741,1992 JIUYUE of United States Patent (USP) of Sabee were issued to people such as GeraldM.Weber on the 1st and was issued to people's such as KennethB.Buell No. 5156793, United States Patent (USP) and United States Patent (USP) that December in 1992 was issued to people such as Gerald M.Weber on the 1st on October 20th, No. 5143679 1 No. 5167897 on May 30th, No. 4107364 1.

The ring ingot rolls the orientation of the fold line on the gauffer of top flat preferably at least along laterally, so that top flat can longitudinally extend.In other embodiments, the orientation of fold line longitudinally, along both direction and/or other direction.Top flat 38 can be along extending perpendicular to these fold line directions.

In the especially preferred embodiment shown in Fig. 1-5, top flat 38 is porous wadding net tablets of a kind of belt variable shape net structure, and above-mentioned deformable net structure can present elastic-like behaviour under the condition that does not add elastomeric material.In addition, the wadding net tablet that has this deformable net structure is called as " deformable porous wadding net tablet " herein, perhaps for for simplicity, is called as " deformable wadding net tablet ", or abbreviates " wadding net tablet " as.(it should be noted that latter two term can comprise porous or atresia wadding net tablet.) this paper is called class elastic construction thin film or " SELF " material with this class tablet.

In a preferred embodiment, deformable porous wadding net tablet can be a kind of porous formed thin polymer film, as a kind of thin film of making according to the above-mentioned patent that is issued to people such as people such as Radel and Ahr.In a utmost point preferred embodiment, the raw material that top flat is used is a kind of porous membrane, and this perforated membrane has one and is integral and limits the hygroscopic part of top flat towards the underwear side with top flat, and this raw material can be any material that following joint 2E describes.Below the explanation about the tablet of belt variable shape net structure be applicable to porous material and pore-free material because SELF technology also is useful in being formed for the preferred components of egative film.In order to know other parts of seeing sanitary towel, only with the part of top flat 38 shown in Figure 1 be the SELF material.

Deformable wadding net tablet has the matrix material of quite low percentage elongation under can the effect by the power that is subjected to usually and makes when dressing sanitary towel.But when being configured as deformable wadding net tablet like that according to this description is described, the matrix material of Cheng Xinging will become tensile under these power effects like this.This deformable wadding net tablet also can be shaped as the structure that " a power barrier " that produces can be provided under the condition of specific, preselected percentage elongation and power.Deformable wadding net tablet preferably is linear low density polyethylene (LDPE) (LLDPE) substantially.Deformable wadding net tablet can be other TPO also, as comprises polyethylene kind or polypropylene and it and above-mentioned material and other mixtures of material of low density polyethylene (LDPE) (LDPE), ultra-low density polyethylene (ULDPE), high density polyethylene (HDPE) (HDPE).Adoptable other suitable polymers examples of material includes, but is not limited to: polyester, polyurethane, can become compost or biodegradable polymer, thermal polycondensation compound, thermoplastic elastomer (TPE) and breathable polymer architecture.

For for simplicity, the deformable wadding net tablet 60 shown in Fig. 8 and Fig. 9 does not illustrate the hole.Fig. 8 and Fig. 9 show the wadding of the deformable under unstretched condition basically net tablet 60.This deformable wadding net tablet has two centrages: a longitudinal centre line (also being referred to as axis or direction " 1 " after this) and a cross central line (also being referred to as axis or direction " t " after this).Cross central line " t " is usually perpendicular to longitudinal centre line " 1 ".In a preferred embodiment, the longitudinal centre line 1 of deformable wadding net tablet is aimed at the vertical main centre line L of sanitary towel.And in further embodiments, the longitudinal centre line " 1 " of wadding net tablet can be along other direction trend, and these directions are determined by desired prolonging direction.

As Fig. 8 and shown in Figure 9, deformable wadding net tablet 60 comprises " the deformable net structure " in some obvious differences and dissimilar district." deformable net structure " speech herein refers to the group that interconnects and interrelate in some zones, these zones can be elongated to certain useful degree along predetermined direction, deformable wadding net tablet is had be similar to elastic relatively low resistance section and relative higher drag section.Deformable wadding net tablet comprises one first district 64 and one second district 66 at least.Respectively there are a first surface and the second surface at its back side in first district and second district.In the preferred embodiment shown in Fig. 8 and 9, deformable net structure comprises some first districts 64 and some second districts 66.There are a first axle 68 and one second axis 69 in first district 64, and wherein first axle 68 is preferably long than second axis 69.The first axle 68 in first district 64 is arranged essentially parallel to the longitudinal axis 1 of deformable wadding net tablet 60, and second axis 69 is arranged essentially parallel to the transverse axis t of deformable wadding net tablet 60.Second district 66 has one first 70 and one second 71.Be roughly parallel to the longitudinal axis of deformable wadding net tablet for first 70, and second 71 transverse axis that is roughly parallel to deformable wadding net tablet.In the preferred embodiment of Fig. 8, first district 64 and second district 66 are linear basically, extend continuously along the y direction that is roughly parallel to deformable wadding net tablet.

First district 64 of deformable net structure has elastic modulus E 1 and cross-sectional area A 1.Second district 66 of deformable net structure has elastic modulus E 2 and cross-sectional area A 2.

In cited embodiment, the part of deformable wadding net tablet 60 is caused when being subjected to along being roughly parallel to an axis of being scheduled to when being subjected to axial tension by " shapings ", and the whole deformable net materials of wadding a quilt with cotton presents controlled resistance along this predetermined axial line.Under the situation of cited embodiment, above-mentioned predetermined axial line is roughly parallel to the longitudinal axis of wadding net tablet." shaping " speech refers to the desired structure of wadding net tablet or the formation of physical dimension herein, and any external force is extended or external force is done the time spent when deformable wadding net tablet is not subjected to, and keeps this desired results or physical dimension basically." shaped portion " speech is meant the tablet part of being made up of the desired structure or the physical dimension of deformable net structure at this.The appropriate method of tablet (deformable wadding net tablet as the described herein) of being used to be shaped includes, but is not limited to: by pressing plate or pressure roller embossing, hot forming, high pressure hydroforming or injection moulding.

Being used for wadding net tablet of the present invention is made up of contiguous deformable net structure visibly different and dissimilar zone, wherein this deformable net structure comprises at least one first district and one second district, and " surface-pathlength " in first district is less than the surface-pathlength in second district.Above-mentioned surface-pathlength is to be in the direction that the unstretched condition lower edge is parallel to a certain predetermined axial line at tablet to record." surface-pathlength " speech is meant that at this contoured surface along that district of discussing is at the measured value that is parallel to the predetermined axial line direction.When referring to some district " obviously different " or " dissmilarity ", refer to those districts that have measurable different surfaces path in this deformable net structure inside herein, this surface-pathlength is under the unstretched condition along being parallel to the predetermined axial line orientation measurement at wadding net tablet.

In the preferred embodiment shown in Fig. 8 and 9, first district 64 is smooth basically districts, promptly the material in first district 64 deformable wadding net tablet before forming step and the state after the forming step substantially the same.Second district 66 comprises crushed element 74 plurality of continuous, interconnected, and these parts alternately extend to outside two planes, first and second surfaces (being respectively 64A and 64B) in first district 64.In other embodiments, crushed element 74 can only extend to outside the plane in first and second surfaces in first district.

Crushed element 74 has first axle 76 and second axis 77 that is basically parallel to the longitudinal axis of deformable wadding net tablet of the transverse axis of a substantially parallel deformable wadding net tablet.First 76 of deformed area 74 equals at least, preferably is longer than second 77.In order to strengthen the two sections resistances-percentage elongation characteristic of the deformable wadding net tablet 60 that is used for sanitary towel 20 of the present invention, first 76 and second 77 ratio was at least 1: 1, preferably was at least 2: 1 or bigger.In general, aforementioned proportion is big more, and two sections resistances, the one percentage elongation characteristic of wadding net tablet is remarkable more.

First district 64 and second district 66 respectively have one " projected pathlength "." projected pathlength " speech is meant when when observing perpendicular to the direction on the surface of wadding net tablet, along the length in the district that the predetermined axial line (promptly being parallel to the longitudinal axis) that is parallel to deformable wadding net tablet 60 is measured at this.The projected pathlength in the projected pathlength in first district 64 and second district 66 is equal to each other.

But, when wadding net tablet is in unstretched condition when being parallel to the longitudinal axis measurement profile of this wadding net tablet, the surface-pathlength L that first district 64 has ₁The surface-pathlength L that has less than second district 66 ₂In order to strengthen the two sections resistances-percentage elongation characteristic of deformable wadding net tablet 60, the surface-pathlength in second district 66 grows 15% approximately than the surface-pathlength in first district at least, more preferably long approximately by 30% than the surface-pathlength in first district, most preferably be to grow 70% approximately than the surface-pathlength in first district at least.

Above-mentioned wadding net tablet 60 presents " poisson lateral contraction effect " of improved cardinal principle less than the identical unshaped wadding net tablet of existing other character." poisson lateral contraction effect " speech is to describe a kind of cross-direction shrinkage behavior that is subjected to tensile material at this.The poisson lateral contraction effect of wadding net tablet of the present invention is about at 20% o'clock preferably approximately less than 0.4 at this wadding net tablet percentage elongation.Preferably, wadding net tablet percentage elongation be about 40%, 50% or even 60% o'clock, the poisson lateral contraction effect that this wadding net tablet presents is approximately less than 0.4.More preferably, when wadding net tablet percentage elongation was about 20%, 40%, 50% or 60%, its poisson lateral contraction effect was approximately less than 0.3.

Concerning deformable wadding net tablet, the axial tension direction that applies of arrow 80 indications is approximately perpendicular to first 76 of crushed element 74.(above-mentioned axial elongation amount is a distance D).Because crushed element 74 can be along being approximately perpendicular to its direction of first 76 elongation, the direction of the axial tension that applies so cause the tablet elongation of deformable wadding net also is approximately perpendicular to first 76 of crushed element 74.

When the axial tension direction that applies of arrow 80 indications was substantially perpendicular to first 76 of crushed element 74, the axial tension with longitudinal component made the direction elongation of deformable wadding net tablet along the axial tension that applies.

Figure 12 shows the typical resistance-extension curve 720 of shaped polymer wadding net tablet of the present invention, also shows a curve 710 plane, the matrix polymer thin film that similarly forms this wadding net tablet.Referring to resistance-extension curve 720, roughly this curve can be divided into: initial basic be section I (representing) and transition region (representing) linear, present lower drag with elongation change with 720b with 720a, with the section II (representing) that is essentially linearity with 720C, section II reflects substantially with the bigger situation of elongation change resistance, II is corresponding to a resistance barrier for section, surpass this power barrier, the wadding net materials will produce additional permanent deformation.

As can be seen from Figure 12, the shaping wadding net tablet with deformable net structure presents controlled multistage characteristic when being subjected to along the stretching that is parallel to wadding net tablet y direction.Compare with the curve 710 that does not present this characteristic, resistance and the tensile pass of executing outward tie up between the section I (720a) of curve 720 and the section II (720c) obvious different.Referring to Figure 10, when wadding net tablet is subjected to the axial tension of arrow 80 indications in Fig. 8, has shorter surface-pathlength L ₁First district 64 give that executing stretches provides most of initial resistance P outward ₁, this section of being equivalent to I.In section I, crushed element 74 major parts in second district 66 are executed outside the tensile plane outside simultaneously, and executing outward stretches provides minimum resistance thereby give.At section I and section in the transition region between the II, crushed element 74 is aimed at executing outward to stretch gradually.In section II, as shown in figure 11, the crushed element 74 in second district 66 becomes roughly with to execute tensile plane outward consistent, and begins to hinder further stretching.Second district 66 provides one to hinder the further tensile second resistance P ₂Tensile first and second resistances produce a drag overall P _T, the resistance that this power is provided greater than first district 64.So the roughly slope of resistance-extension curve of section II shows the characteristic of the barrier of exerting oneself, this slope is obviously greater than the roughly slope of the resistance-extension curve on the section I.

As (L ₁+ D) less than L ₂The time, resistance P ₁Much larger than resistance P ₂Simultaneously as (L ₁+ D) less than L ₂The time, first district 64 provides an initial resistance P ₁, common P ₁Satisfy equation:

P 1 = \frac{(A 1 * E 1 * D)}{L 1}

As (L ₁+ D) greater than L ₂The time, first district and second district to the outer elongation D that executes total resistance P that closes is provided _T, this drag overall P _TUsually satisfy equation:

PT = \frac{(A 1 * E 1 * D)}{L 1} + \frac{(A 2 * E 2 * | L 1 + D - L 2 |)}{L 2}

(wherein * represents multiplication sign)

The maximum elongation rate that in section I, occurs be considered to wad a quilt with cotton " effective aspect ratio parameter " of net tablet.Can determine above-mentioned " effective aspect ratio parameter " effectively by observational ability-extension curve 720, the point of the percentage elongation that the approximate point at the flex point place in the transition region between section I and section II is " effective aspect ratio parameter ".The scope of effective aspect ratio parameter can be from about 10% to 100% or change in larger scope; The scope of having found such elastic response is very important in disposable absorbent article, and this scope is subjected to the surface-pathlength L in second district 66 to a great extent ₂Surpass the surface-pathlength L in first district 64 ₁Degree and basement membrane character control.Need be with the much bigger power that needs than wadding net 60 so that the percentage elongation of basement membrane equals to wad a quilt with cotton the percentage elongation of net 60.The approximation ratio of section I as required can be by being adjusted at the surface-pathlength L under the unstretched condition ₁And L ₂Control.The performance of width, thickness, interval and basement membrane by adjusting first district 64 can control section I power-percentage elongation characteristic.

When the wadding net tablet of Fig. 8 was subjected to stretching, this wadding net materials presented the elastic characteristic of class, and it is along executing tensile direction elongation outward, in case cancellation external force (unless being elongated to yield point) all can retract to unstretched condition basically.This wadding net tablet can not lost its basic recovery capability through repeatedly executing stretching outward.In view of the above, stretch or power in case execute except separating, this wadding net tablet just can retract to its unstretched condition basically.

Though easily and reversibly extend on the axial tension direction that wadding net tablet can be executed outside being approximately perpendicular to first 76 direction upper edge of crushed element 74, wadding net tablet is not extending being roughly parallel on first 76 the direction of crushed element 74 relatively.The plastic deformation that is delivered on the crushed element 74 makes these crushed elements (promptly be approximately perpendicular on first the direction of crushed element) elongation in one direction, and is relatively not extending on substantially perpendicular to prolonging direction (promptly being in substantially parallel relationship to first direction of crushed element).But in some other embodiment, deformable wadding net tablet 60 can have some first districts 64 in the different directions elongation, and this deformable wadding net tablet 60 can be extended in more than one direction.For example, deformable wadding net tablet 60 can have some from a center outwards first districts 64 of elongation and several second district 66 that distributes around the concentric circular at this center, make this deformable net tablet 60 all directions on the x-y plane of wadding a quilt with cotton all extending.

The size that makes wadding net tablet extend required external force depends on the width and the interval of the intrinsic property and the non-deformation zone 64 of the matrix material that constitutes wadding net tablet, and non-deformation zone 64 is narrow more and wide more at interval, and it is just more little to reach the required tensile force of desired percentage elongation.First 68 (being length) of non-deformation zone 64 preferably is longer than second 69 (being width), and preferred length-width ratio is between 5: 1 and 300: 1.

Can also change the degree of depth of crushed element 74 and number controls and makes wadding net tablet of the present invention extend needed external force or stretching.In a preferred embodiment, crushed element 74 is that 5.0 inches * 12 inches * 0.75 inch rigid plate processes by two overall dimensions.The one side of every rigid plate has successive engaging tooth, and the cross section of engaging tooth is roughly triangle, and its end is 0.030 o'clock, and circular cone top tip radius is 0.008 inch.The centreline space of tooth is every equating, and increases progressively with 0.030 inch.Cut a succession of parallel to each other and perpendicular to the groove of the tooth that evenly separates in band tooth one side of a plate.The width of these grooves is 0.031 inch and arranges continuously that the centre distance of two adjacent slots is 0.25 inch on the whole length of plate.These grooves correspond to the non-deformation zone of the wadding net tablet that has become shape.

Preferred LLDPE matrix material is placed between two plates on the hydraulic press, the platen of this hydraulic press than above-mentioned plate greatly with uniform distribution pressure.Above-mentioned two plates institute plus-pressure is at least 4000 pounds.Then from taking out the wadding net tablet that has been shaped between two plates.If crushed element number one regularly, Deformation Height that produces on crushed element and deformation extent increase, and then effectively stretching, extension or elongation increase.Similarly, if Deformation Height or deformation extent one are regularly, the quantity of crushed element or frequency increase, and then effectively stretching, extension or elongation also increase.

In some preferred embodiments, become top flat 38 hydrophilic so that liquid passes through top flat 38 quickly.This can reduce the probability that Excreta in the body is overflowed top flat rather than discharged and absorbed by absorbent article core by top flat.Can handle top flat with surfactant, make it to become hydrophilic.The method of the application surface activating agent that is fit to is the United States Patent (USP) 4950254 that is issued to Osborn and No. 5009653 (these methods comprise in the polymeric material that surfactant is mixed the formed film top flat) existing description, and above-mentioned document has also been described the method on the surface of the parts below surfactant processing top flat.

In addition, in some preferred embodiments, the inner surface 38B of top flat 38 closely contacts with following moisture absorption layer and combines.This contact relation makes liquid see through top flat 38 quickly.The contact relation that can keep top flat 38 and following surface layer by method on the surface layer that top flat is bonded to down.But, might not absolute demand that the surface of top flat 38 is mutually bonding with the surface of following surface layer.Can be by adhesive-applying between top flat and lower member, make on the moisture absorption layer below down the fiber of surface layer tangles, be fused to top flat 38 with many independently welding points that separate with top flat or with other known method make top flat 38 and below absorbent portion keep in touch.

B, absorbent article core

Absorbent article core 42 is between top flat 38 and egative film 40.Absorbent article core 42 is the parts that absorb slop (as menstruation and other liquid).The absorptive capacity of absorbent article core 42 needn't be more a lot of greatly than the total amount of fluid expection to be absorbed.In fact, have and be enough to absorb most of or whole excremental abilities in the bodies, then the amount of the slop that can be roughly absorbs less than needs of the absorptive capacity of absorbent cores 42 if be difficult for extended part 44.Absorbent article core 42 is normally compressible, can fit and wearers skin do not had stimulation.

In the embodiment shown in Fig. 1-5, absorbent cores 42 is preferably tensile.But might not require absorbent article core 42 all extending so that certain benefit to be provided in all embodiment.For example, a kind of not extending relatively absorbent article core can be used in the following embodiments, wherein top flat and following hygroscopic part (or whole hygroscopic part) are tensile, and top flat is not attached on the face of absorbent article core with this hygroscopic part, therefore, they separate (or releasing is connected) with absorbent article core.The United States Patent (USP) that was issued to Osborn on April 16th, 1991 has been described the notion (general) of removing connection for No. 5007906.If relative with other the not extending lower member with absorbent article core of the elongation of top flat 38 is irrelevant, then this embodiment is useful.In such an embodiment, although the inextensibility of lower member, top flat plays a major role providing on required body fit and the wearer comfort.

The material of making absorbent article core 42 can be any material that is used for this purpose in the art, comprises natural material and synthetic material.The non-limiting example of these materials comprises natural material such as powder wood pulp material (being referred to as the porous plug hair usually), wrinkling cellulose wadding, the polymeric gelling agent of aquogel type, wrinkling silk paper or the corrugated adhesive-bonded fabric that comprises the fiber of forming by moisture absorption or superabsorbent polymer, the cross-linked cellulose fibres of modification (being issued to those materials of describing in people's such as Young No. 5217445, the United States Patent (USP) as on June 8th, 1993), capillary channel fiber (the fiber that promptly has the fibrous inside capillary channel, as those materials described in No. 5200248, the United States Patent (USP) that is issued to people such as Thompson on April 6th, 1993), hygroscopic foam material (being issued to those materials described in No. 5268224, people's such as DesMarais No. 5260345, United States Patent (USP) and the United States Patent (USP) that December in 1993 was issued to people such as DesMarais on the 7th as on November 9th, 1993), the heat bonding airlaid material is (as being called " Catamenial Absorbent Structures Having Thermally BondedLayers for Improved Handling of Menstrual Fluids, and Their Use in CatamenialPads Having Improved Fit and Comfort " (P﹠amp by the name that people such as Richards apply on October 21st, 1993; G case numbers 5051) those materials described in the U.S. Patent application serial number 08/141156), moisture absorption sponge, synthetic staple fibre, polymer fiber, peat moss floss or any equivalent material or these mixtures of material.

Also can call " sucting wet gel material " (" AGM ") or " superabsorbent material " to polymeric gelling agent listed above.Polymeric gelling agent is those materials that form hydrogel when sucking these liquid with liquid (for example water or other body fluid) when contacting.Therefore, polymeric gelling agent can absorb and retain the liquid that is drained in the absorbent article core 42, thereby makes the absorbent device of the present invention have enhanced wettability power and/or the ability of the retain liquid improved.Be used in the absorbent article core 42 polymeric gelling agent usually by a kind of water-fast, slightly crosslinked basically, part is neutral, the granule of the polymeric material of aquogel type constitutes.Above-mentioned polymeric gelling agent can be multiple shape, comprises ball volt, lamellar or fibrous.

In a preferred embodiment, absorbent article core 42 is laminations, and the superabsorbent polymeric material 41 (as becoming graininess) that this lamination is positioned at by one deck between the silk paper (the first and second silk paper layers) of two-layer air lay constitutes.The above-mentioned first and second silk paper layers provide the capacitive of superabsorbent polymeric material, and have improved the excremental horizontal wicking properties that has absorbed in the whole absorbent article core 42, and the certain moisture ability also is provided.The silk paper layer can be by the superabsorbent material granule being sandwiched in wherein folding a slice silk paper constitutes or being made of the silk paper that separates of two identical (or different).A kind of suitable lamination is the superabsorbent lamination that is called as WATER-LOCK L-535 (WATER-LOCK is the registered trade mark of Grain Processing Corporation) from the Grain Processing Corporation of Muscatine purchase of Iowa (Iowa).The United States Patent (USP) that the United States Patent (USP) that was issued to people such as Pedersen on August 21st, 1984 was issued to people's such as Lindsay No. 4260443, United States Patent (USP) on April 7th, No. 4467012 1 and was issued to people such as Kramer on March 25th, 1986 all discloses this class superabsorbent lamination for No. 4578068.

Can make above-mentioned absorbent article core material become tensile material with multiple distinct methods (comprise cutting or be cut into narrow slit etc.).Fig. 1 shows an embodiment, in this embodiment, for having the longitudinal tensile strain performance, with top flat 38 partial cut, will cut out horizontal narrow slit as the absorbent article core 42 of above-mentioned lamination or horizontal narrow slit is cut in the part.Can have the sort of narrow slit shown in Figure 1 on the whole plane graph zone of absorbent article core 42, perhaps only on the part of absorbent article core, narrow slit be arranged.Embodiment as shown in Figure 1 preferably, whole absorbent article core is cut into narrow slit.In further embodiments, can open narrow slit being on that part of absorbent article core 42 that is difficult for outside the elongate member 44, and be difficult on that part of below the elongate member 44 absorbent article core and do not open narrow slit being positioned at, otherwise perhaps, make the former not have narrow slit, make the latter that narrow slit be arranged.In some other embodiment, the major part of absorbent article core 42 is left narrow slit (or otherwise making it to have extensibility), and in the neighboring area of absorbent article core or scope no narrow slit so that the chipware edge is stable and reduce Excreta from chipware 42 both sides wickings.

Main part 21 vertically and end margin 22 and 24 preferably sealed, to prevent when sanitary towel is extended liquid or anyly to contain the superabsorbent material generation wicking of liquid or from sanitary towel, extrude.In addition, the longitudinal edge 42C and the 42D of absorbent article core 42 can be sealed, rather than the edge of entire body part is sealed.The edge of absorbent article core 42 can be encased or cover by (as a silk paper layer).In other alternative embodiment, can or carry out other and handle the edge fold of silk paper, with the wicking and extruding from core 42 of the superabsorbent material granule 41 that prevents liquid or contain liquid.All permanent seals along the main part periphery all should not rupture (between the whole operating period, should keep all sealings in sanitary towel) when stretching.

C, egative film

Egative film 40 should be able to prevent to be absorbed with remain in absorbent article core 42 in the Excreta article (as short underpants, nightwear and underwear) getting wet and contact with sanitary towel 20.Egative film 40 should submissive and liquid-tight (as menstruation and/or urine).

Egative film 40 can be made by textile material or non-woven material, thin polymer film (for example polyethylene or polypropylene thermoplastic thin film) or composite (as the non-woven material of plated film).Preferably a kind of plastic sheeting of egative film 40 is from about 0.012mm (0.5mil) to the polyethylene film of about 0.051mm (2.0mils) as thickness.Typical polyethylene film is by Clopay Corporation of Cincinmati, and the trade mark that Ohio makes is a P18-1401 product and by Terre Haute, and the trade mark that Indiana produces is the Tredegar Fihm Products of XP-39385.In the preferred embodiment shown in Fig. 1-5, above-mentioned those the typical thin polymer films of egative film 40 usefulness form through the SELF PROCESS FOR TREATMENT.

D, be difficult for elongate member

Sanitary towel 20 shown in Fig. 1-5 preferably also disposes optional difficult elongation or not extending district or difficult elongate member (or insert) 44 between top flat 38 and absorbent article core 42, preferably insert 44 is placed near the center 32 of sanitary towel 20, but as shown in Figure 1, also can make insert 44 be in first petiolarea (perhaps even in second petiolarea 30 of sanitary towel) of sanitary towel at least in part.Shown in especially preferred embodiment in, insert 44 response is worked from two not homologous power at least.Insert 44 preferably can respond the stretching, extension of sanitary towel's remainder and be offset (and preferred center upwards skew or protuberance during the wearer dresses, so that improve and the contacting of health), can also respond the inside pressure that wearer's two thighs apply and upwards be offset.

Insert 44 have one towards bodyside 44A and one day to underwear side 44B, pair of longitudinal edges 44C and pair of end edge 44D.Insert 44 generally can be at least than any parts of the more difficult elongation of some other parts of the main part 21 of sanitary towel 20.Comparatively speaking, insert 44 can be quite not extending.In further embodiments, this elongate member that is difficult for also can have certain extensibility, and it is littler than the elongation ability of the other parts of main part 21 certainly.

Insert 44 preferably should be submissive.The compliance of insert 44 should be enough to make the wearer to feel that sanitary towel is comfortable.But the compliance of insert 44 is not unconfined, certainly will stop compliance and be enough to make and still remain on desired use shape under the effect of the power that sanitary towel produces being subjected to wearing sanitary towel and do not collapse because be difficult for elongate member 44.But the structure optimization of insert 44 should have enough rigidity, makes it can become when transverse pressure inwardly acts on this longitudinal edge 44C that is difficult for elongate member curved or protuberance.Response during use acts on transverse pressure in the sanitary towel 20 and does not provide under the situation of z direction protuberance, insert 44 preferably do not collapse inwardly (promptly pressing " flat " to become spongy).Insert 44 can be one deck tablet shape or other suitable shape.Insert 44 preferably reaches under the state that has become wet (as being got wet by body excretions) in drying regime can both keep enough rigidity.But the shaping of the preferred still stiffnesses of insert 44 and wet stability, these terms define in No. 5171302, the United States Patent (USP) that is issued to Buell.Also insert 44 and sanitary towel can be made the shape that resembles the described cross section of above-mentioned patent document.More particularly, the insert that this description is described has improved structure, design this structure and reach desired shape in the use, even effective more under thin more situation, more the user is felt comfortably cool.

But insert 44 under the effect of low relatively power should be transverse compression so that sanitary towel when dressing user feel comfortably cool.Sanitary towel and other catamenial products are subjected to the effect of transverse compression power when dressing.After cancelling these compression stresses, sanitary towel can be from its compressive state resilience.After the compression stress that removes two lateral inward that thigh applied of wearer, insert 44 can have the non-compressed state of enough elastic recoverys in use.In addition, if insert is connected on the vertical side of the edge of absorbent article core, then insert can stretch with interior crotch after wearer's two legs applied pressure is cancelled passively.This can guarantee that insert 44 makes sanitary towel 20 can cover the major part of wearer's short underpants during use, thereby reduces Excreta near the transverse leakage sanitary towel both sides and wearer's underwear is made dirty (can be referred to as " side direction is made dirty ").

The material of many fundamental types that insert 44 can be mentioned by the present invention is made.But these materials preferably needn't can make the technology that material has extensibility (SELF technology for example, ring ingot roll, wrinkle Zhe, wrinkling or open narrow slit) through any.Fig. 1-5 shows an embodiment, and insert 44 is moisture absorption laminations of a no narrow slit in this embodiment.Insert 44 preferably also is designed to the wrinkle Zhe that can provide controlled, as by folding so that produce a middle longitudinal folding line thereon it.

In an especially preferred embodiment, insert 44 is the laminations that are made of the heat fused hygroscopic material that cellulose and synthetic fibers mixture are made.The preferred material of making insert 44 was called by the name that people such as Richards apply in 21 days above-mentioned October in 1993: be described in the U.S. Patent application serial number 08/141156 of " Catamenial Absorbent StructuresHaving Themally Bonded Layers for Improved Handling of Menstrual Fluids, and Their Use in Sanitary Napkins Having Improved Fit and Comfort ".Especially preferred heat fused hygroscopic material is that the trade mark of buying from the Dan Web of Aarhus of Denmark is DANWEB material #1079-2338 and 2339.DANWEB material #1079-2338 is a kind of about 70% Flint River fine hair (cellulose), bicomponent fibre and particulate homogeneous mixture of about 15%Nalco1180 sucting wet gel material of 15%DANAKLONES-C1.7 dtex * 6mm of containing.DANWEB material #1079-2338 is configured as has quantitatively (basis weight) about 152g/m ², the about 1.2mm of thickness that under 0.2psi load, records, the wadding net of the about 0.13g/cc of density.Insert 44 is DANWEB#1079-2338 material and one deck 18g/yd at least preferably ²(21.5g/m ²) the lamination formed of the spunbond polypropylene non-woven material that is called as CELESTRA, above-mentioned CELESTRA material can be from Fiberweb, North America of Simpsonville, SC bought, and then this material was issued to the figure embossing described in people's such as Megison No. 4781710, the United States Patent (USP) by on November 1st, 1988.Preferably above-mentioned non-woven material is fused to the back side of DANWEB material with the fomentation bucket under 300 °F, must notices during making guaranteeing that this lamination has certain liquid permeability.

Insert 44 can be placed on the top of absorbent article core 42 simply, by being close to locating on the parts of sanitary towel 20 on every side.In the embodiment shown in Fig. 1-5, insert 44 is fixed on the single-point 46 of every vertical side of the edge of sanitary towel.During stretching sanitary towel, the center 32 of sanitary towel narrows down.This will cause insert 44 to become curved or distortion, and form a protuberance 48 (as shown in Figure 5) along the main longitudinal centre line L of sanitary towel 20.

Shown in preferred embodiment in, top flat 38, egative film 40 and absorbent article core 42 are tensile, insert 44 is positioned at the top of absorbent article core, compares with other these parts, it is to be difficult for elongation.At the bottom of insert 44 fusion non-woven material, make insert 44 have more smooth basal surface (surface that promptly has lower coefficient of friction), therefore, when following absorbent article core 42 stretched, insert 44 can more easily slide with respect to absorbent article core 42.Can improve the stretching, extension performance of absorbent article core 42 whereby and this insert 44 that is difficult for elongation is moved up.

E, other alternative parts

Sanitary towel 20 of the present invention can have optional optional feature.For example, sanitary towel 20 of the present invention can have one or more additional liquid or absorbent portion or layer.These additional liquid or absorbent portion or layer can be the integral parts of the parts (as top flat or absorbent article core) in the sanitary towel, and perhaps they can be the independent stratums that is between absorbent article core 42 and top flat 38, egative film 40 or top flat and the egative film.Fig. 3 shows, in the preferred embodiment of sanitary towel shown in Fig. 1-5, lower floor's absorbent portion, as wick material (or receiving material) 50 constituted top flat 38 towards the underwear side.In the embodiment shown in fig. 3, receiving-member 50 is to have and the identical nonwoven web of absorbent article core 42 shapes, and it is in aggregates with the formed film part of top flat to be fixed with binding agent, and handles through SELF with above-mentioned formed film before sanitary towel's assembling.The material that is suitable for use as the receiving-member 50 of top flat is a kind of bonding nonwoven web gas-pervious, that be made up of bicomponent fibre, this sheet stock is the Havix Corporation by Japan, the tablet (being called Fukumura in the past) of the trade mark that Gifu-City makes HAVIXS2146 by name.This tablet is arranged to extending along its length, its " villous " side is adjacent with above-mentioned thin film.

The combination of F, top flat, egative film and absorbent article core material and they are assembled into the main part of sanitary towel

The main part 21 of sanitary towel 20 of the present invention can be made of any combination of different top flats, egative film and core material described in this description.As mentioned above, main part 21 can all be made up of extensible member.Main part 21 also can be by other type or constituting by tensile or not extending top flat, egative film and absorbent article core described in PCT publication number WO93/01785 and 93/01786.

Can aforementioned body each parts (top flat, egative film and absorbent article core) partly be combined with any suitable mode.In preferred embodiment shown in Fig. 1-3, aforementioned body each parts partly are assembled into a kind of " interlayer " shape, the size of each parts should be able to guarantee that the edge of top flat 38 and egative film 40 reaches the outside at the edge of absorbent article core 42.Top flat 38 and egative film 40 preferably adopt known technology at least in part periphery couple together.As shown in Figure 1, preferably egative film 38 is connected on the egative film 40 along a seam (as seam 90).Seam 90 is preferably liquid-tight.Can form seam 90 with any known technology that is used for this purpose in the present technique field (as by glueing joint, curl or heat sealing etc.).

" connection " speech comprises the following connected mode at this: by the direct bonding mode of two parts directly is fixed to parts on another parts; Or by parts being bonded in earlier on another or the several intermediate member, be fixed on again on another parts successively then, and a parts indirect securement is come on another parts; And make parts and another parts form an integral body, that is, making parts is the part of another parts basically.

The parts of sanitary towel 20 can be bonding by bonding agent, joint close, heating and/or pressurization connections, dynamic power machine connections, ultrasonic connection, make the fiber that constitutes sanitary towel or other each structural member mixes or mat (for example by the fiber melt-blowing of parts of formation on another parts, be squeezed in parts on another parts or pass through in the art any other known method).In December in 1991 17 days U.S. Patent application serial number 07/810744 (PCT patent publication No. WO93/11725, open day is on June 24th, 1993), the mode that suitable being used to connects each parts of sanitary towel has been described with people's such as Cree name application.

When main part 21 is made up of several extensible member, then can above-mentioned each parts be linked together with any suitable method that extends to small part main part 21 that can make.The curling sealing-in of the currently used impenetrable liquid layer that will be difficult for extending can be used for this purpose in known sanitary towel, and main part 21 still can obtain satisfied elongation.

Among the tensile embodiment of sanitary towel shown in Fig. 1-5, adopt some mechanical connection points 94 some part of top flat and egative film to be linked together with a kind of tensile bonding agent 92 and in peripheral area at the edge of top flat and egative film at the periphery of sanitary towel.Mechanical connection point 94 (its part only is shown among Fig. 1) provides added strength, and mechanical connection point 94 is distributed in the zone line in bonding pad and disconnected district.

Figure 13 shows the details of a kind of figure in bonding pad 96 and disconnected district 98.In the embodiment shown in fig. 13, the bonding pad comprises some separated line segments, at the above-mentioned line segment of each junction almost perpendicular to the longitudinal edge 42C of absorbent article core 42.Therefore, bonding pad 96 has the laterally part of trend of an edge usually at least.In a further embodiment, bonding pad 96 can have a lot of suitable figures, and these figures comprise (but being not limited to) some geometries, as circular or square or other suitable shape, or the line segment of successive straight line or interruption.No matter adopt which kind of definite figure, the bonding pad of finishing the absorbent device after the assembling should separate along the direction of expectation elongation, so that the bonding pad is separated out by disconnected.Bonding pad 96 can not be extended, but not extend bonding pad 98.

Preferably form bonding pad 96, in this technology, should carefully control so that work in-process neither makes the material fusion that constitutes top flat, do not make the material fusion that constitutes egative film again the temperature and pressure that is adopted by heating or pressing technology.If temperature or pressure are too high, will make top flat, egative film or top flat and egative film fusion, formed junction point will become fragile, and its result will make top flat and/or egative film tablet tear in the junction.Can form through the polyethylene formation film topsheet of SELF PROCESS FOR TREATMENT with through the suitable sealing-in of the polyethylene film egative film of SELF PROCESS FOR TREATMENT by hot plate with bonded area as shown in Figure 1, above-mentioned bonded area is about 6mm * 2mm, apart 5mm between every district.Above-mentioned plate is heated to 170 °F and continued 5 minutes and form sealing-in with hand.

For the ease of assembling, preferably adopt the mode of above-mentioned link.(also can otherwise connect various parts.) for example, the present invention includes what is called " tubular " product.In these products, the covering tablet (as top flat) of saturating liquid can be wrapped in fully absorbent article core and egative film around, these parts can be linked together then.In another kind of structure, can wrap in top flat around the absorbent article core, the chipware that will wrap is placed on and is fixed on the egative film again.

G, lateral elongation spare

Sanitary towel 20 preferably also comprises a pair of lateral elongation spare 52, and one of them lateral elongation spare is arranged along each vertical side of the edge 22 of main part 21.Above-mentioned lateral elongation spare 52 can be gusset spare (or " underwear covering ") or flank, when in the short underpants that sanitary towel are placed on the wearer and wearer when short underpants are drawn up, gusset spare is preferably automatically folding along the elastic sides edge of wearer's short underpants, and above-mentioned flank can be used for wraparound around short underpants by the wearer.

In this description to " being connected to ", the description of lateral elongation spare 52 that " is in " vertical side of the edge 22 of (or " being incorporated into ") main part 21 can comprise lateral elongation spare wherein 52 and main part 21 (with the elongate member that comprises as the parts of top flat and egative film) in aggregates embodiment, and other lateral elongation spares wherein 52 are embodiment of the separate piece that links to each other with main part 21 in vertical side of the edge 22 places or its inboard of main part 21.If above-mentioned lateral elongation spare 52 is some separate piece, they can link to each other with any part of main part 21, as with towards bodyside, towards the short underpants side or between above-mentioned both sides some the point link to each other.

Above-mentioned lateral elongation spare 52 can be tensile, (that is, they can have some zones of extensibility and some to be difficult for the elongation zone) that be difficult for extending or that part is extending and part is difficult for extending.If above-mentioned lateral elongation spare is tensile, they usually can be longitudinally, along laterally or longitudinally and any direction elongation laterally.

In order to discuss, the embodiment shown in Fig. 1-5 provides an example of lateral elongation spare, and this lateral elongation spare can be a gusset spare.This gusset spare 52 is a pair of separate piece, one of them each longitudinal edge 22 along main part 21 be connected to sanitary towel on underwear side 20B.Each gusset spare 52 is improved crescent or wadding net of a slice tensile tablet as shown in figure 14 preferably.The inboard of wadding net tablet was a middle concave before the vertical side of the edge 22 along main part 21 connects.Every crescent wadding netting gear has a proximal edge 54, and this proximal edge 54 contiguous gusset spares 52 connect (or extend to from this) main part 21 places, and each gusset spare extends outwardly into distal edge 56.As shown in Figure 4, the distal edge on plane graph 56 has the shape that limits two circular portion (or ledge) 58A and 58B.These circular portions (with total label 58 representatives) are positioned near the two ends of wadding net tablet.Be positioned at circular portion 58A on gusset spare 52 distal edge and 58B shown in Fig. 4 are separated by the mid portion 58C of distal edge.The position of the mid portion 58C of this distal edge 56 is than the longitudinal centre line of the more close sanitary towel of the outmost point of circular portion.In the embodiment shown in Fig. 1-5, by launching crescent inside edge and connecting them so that crescent curvature of following the vertical side of the edge 22 of main part 21 is given this shape with mid portion 58G.In connecting the technology of gusset spare 52, in this embodiment, on gusset spare 52, process one at least, best two pleats 59 overlap on the second portion of gusset spare in the first of pleat 59 place's gusset spares.

The ora terminalis 57 that Fig. 4 shows gusset spare 52 preferably is less than or equal to about 90 ° situation with the angle [alpha] that longitudinal centre line forms.When the length of gusset spare 52 increased, particularly when the length of gusset spare was grown (length when the proximal edge along gusset spare is parallel to longitudinal centre line and measures) more than or equal to about 170mm, it is more important that angle [alpha] becomes.Angle α is remained on to help gusset spare in the scope of afore mentioned rules and be folded in below wearer's short underpants.Specifically, when sanitary towel being placed on wearer's short underpants, suitable angle [alpha] prevents that undesirable gusset spare 52 from making the back side, end of main part be turned to they bases tendency on one's body suddenly.This is to gusset spare and aligned those district's particular importances in the short underpants leg opening district with maximum curvature (i.e. Zui Xiao radius of curvature).Find that the narrowest part that the short underpants crotch is left in the short underpants leg opening district with maximum curvature usually longitudinally farthest outwardly.

Gusset spare 52 can have any character described in the following patent application, and these patent applications are: the name of being applied for by people such as Lavash on July 22nd, 1993 is called the U.S. Patent application serial number 08/096121 (disclosed PCT publication number WO94/02096 on February 3rd, 1994) of " Absorbent ArticlesHaving Panty Covering Components That Naturally Wrap the Sides of Panties " and was called the U.S. Patent application serial number 08/124180 of " AbsorbentArticles Having Panty Covering Components Comprising Extensible WebMaterials Which Exhibit Elastic-like Behavior " by the name of the people such as Mansfield application on September 20th, 1993.

Gusset spare 52 can also have various alternative embodiment, for example, as shown in figure 15, in another embodiment, when being folded in wearer's medicated underpants both sides, stretches gusset spare, not to adopt to make to enclose the method that part 52 has fold, roll part, SELF PROCESS FOR TREATMENT part or wrinkling in the different piece of gusset spare 52 but make gusset spare 52 have the ring ingot.

In other alternative embodiment of the present invention, in sanitary towel 20, can dispose each longitudinal edge 22 outwardly directed flap from sanitary towel 20.These flaps can have any suitable shape.For example, can make suitable flap according to the description of following patent literature, these documents are: be issued to No. 4589876, the United States Patent (USP) of Van Tilburg on May 20th, 1986, be issued to No. 4687478, the United States Patent (USP) of Van Tilburg on August 18th, 1987, December in 1993 was issued to No. 5267992, the United States Patent (USP) of VanTilburg on the 7th, be issued to No. 5330461, the United States Patent (USP) of Leeker on July 19th, 1994, the name that JIUYUE in 1994 was issued to people such as Niihara on the 6th is called No. 5344416, the United States Patent (USP) of " Absorbent ArticleHaving Inwardly-Folded Pleated Flaps ", the name that JIUYUE in 1994 was issued to people such as Osbom on the 13rd is called No. 5346486, the United States Patent (USP) of " Sanitary Napkin Having LaterallyExtensible Means for Attachment to the Undergarment of the Wearer ", the name that is issued to people such as Lavash February 14 nineteen ninety-five is called No. 5389094, the United States Patent (USP) of " AbsorbentArticle Having Flaps and Zones of Differential Extensibility ".In other alternative embodiment, sanitary towel can dispose some gusset spares, and these gusset spares have one or more parts of the flap described in aforesaid patent documentation and the patent application.

Figure 16-18 shows a preferred embodiment of sanitary towel of the present invention.The lateral elongation spare 52 that embodiment shown in Figure 16-18 has preferably has the district or the tensile fundamental component of at least two different directions." tensile fundamental component " used herein refers to a vector component, and the direction of this vector component is positioned on the main prolonging direction in this district.

Each lateral elongation spare 52 preferably comprises one first district 52A and one second district 52B at least, and first district has along first direction D ₁Main elongation component, second district has along second direction D ₂Main elongation component.It can certainly be other component.The first district 52A be positioned at main part 21 below, in the embodiment shown in Figure 16-18, the first district 52A is longitudinally extending usually.The second district 52B comprises the part of some vertical side of the edge that is in main part 21 22 lateral outer side at least, and during the elongation of lateral elongation spare, these parts are mainly along extending transversely.The longitudinal tensile strain of the first district 52A of lateral elongation spare 52 can make the main part 21 of the sanitary towel that is attached thereto longitudinally freely extend.Certainly should expect also that the lateral elongation design shown in Figure 16-18 also can be used in the not extending usually sanitary towel of main part.The cross-directional extensibility of the second district 52B can make the long part of lateral side extending transversely when centering on the arc lateral margin wraparound of wearer's short underpants.This make lateral elongation spare and short underpants around no-float and do not produce gauffer and lateral elongation spare and be in and do not have stressed state.For further reduce lateral elongation spare along wearer's short underpants side suffered power when folding, can as No. 4589876, the United States Patent (USP) that is issued to Van Tilburg is described, on the distal edge 56 of lateral elongation spare, open narrow slit or fluting.

Figure 16-18 shows a kind of preferred remodeling of alternative embodiment, in this remodeling, lateral elongation spare 52 not only links to each other with main part, also can and be folded to form satchel with their twice opisthotonos (doubled-back), and the time spent is not collected in it in this satchel.Lateral elongation spare 52 is linked to each other with main part 21 at 57 places, end with formed projection 55 of lateral elongation spare 52 reverse side bursts and lateral elongation spare 52.The part of the end 57 of the above-mentioned lateral elongation spare 52 that links to each other with main part 21 is preferably taper or cuts (as shown in figure 18) sideling.Preferably the long ora terminalis with lateral elongation spare 52 is arranged on from main longitudinal centre line part far away, makes to have the opening of broad by folded sides to the formed satchel of elongate member, so that in the satchel of easily lateral elongation spare 52 being packed into.Can lateral elongation spare be linked to each other with main part with any suitable method as known in the art, so that the each several part of absorbent device is coupled together.In shown preferred embodiment, adopt tensile binding agent that lateral elongation spare 52 is linked to each other with main part 21.

Preferably the cementing line (line bond) 100 that the proximal edge 54 of lateral elongation spare 52 is longitudinally moved towards is linked on the main part 21.The petiolarea 57 of this fin (as shown in figure 18, preferably its part) is linked on the main part 21 along bonding 102 lines in end that tilt.

Folding or twice opisthotonos can form not standing part 53 at above-mentioned proximal edge place with lateral elongation spare 52, and when dressing sanitary towel, this part is extensible, therefore can provide lateral elongation spare additional transverse extension performance.Obviously, this is a concrete preferred embodiment, and in other embodiments, lateral elongation spare 52 simply form only is fixed on the egative film.Be issued on January 25th, 1994 to have further described in people's such as Osborn No. 5281209, the United States Patent (USP) and be used for suitable structure folding and that volume is hidden sanitary towel's fin.

In the preferred embodiment shown in Figure 16-18, lateral elongation spare 52 is a kind ofly to be bonded with gas-pervious polypropylene nonwoven fabric laminate on LLDPE film top, then it is carried out SELF and handles.This lamination is shaped because of handling through SELF, and therefore, its first district 52A and the second district 52B comprise that is similar to a deformable net structure 60 shown in Figure 8.But, in the first district 52A of lateral elongation spare 52, the longitudinal centre line 1 of deformable net structure (and first district 54 of lateral elongation spare) is generally vertical trend, and in the second district 52B of lateral elongation spare 52, the longitudinal centre line 1 of deformable net structure (and first district 64 of lateral elongation spare) is generally horizontal trend.

In addition,, preferably side direction elongate member 52 is reinforced, or otherwise made it to have at least some zones more stiffening than the lamination of handling through SELF because the SELF treatment process can make tablet extremely submissive and easily dangle (drapable).Otherwise lateral elongation spare 52 may be too soft, is not easy to use.Preferably as shown in figure 18, lateral elongation spare 52 has a stiffening district 52C near its distal edge 56.In this illustrated embodiment, provide stiffening district 52C by making lateral elongation spare have an adherent layer or elongate strip 89, when lateral elongation spare 52 is folding and when putting in the bag, above-mentioned elongate strip covers lateral elongation spare binding agent 88.(shown in Figure 18 is the situation that does not adopt single binding agent blow-out patch, is preferably in some sections that lateral elongation fixture 88 is arranged on the lateral elongation spare.Length and following much such sections that need that whole lateral elongation spare 52 need be fixed on wearer's short underpants owing to lateral elongation spare.)

Can move (perhaps with stiffening district 52C by the not too stiffening part of guaranteeing lateral elongation spare, in other words, whole lateral elongation spare is moved as the parts in aggregates with enduring with all one's will district 52C), this stiffening district 52C is helped lateral elongation spare 52 wraparounds around the edge of wearer's short underpants.This kind situation has without any the situation of the stiffening zones of extensibility of distinguishing with lateral elongation spare 52 has compared tangible advantage.In this case, for lateral elongation spare is folding and when catching the distal edge 56 of lateral elongation spare 52 along wearer's short underpants, some part of lateral elongation spare 52 can stretch, but when above-mentioned distal edge moves, the part that always has some not move with lateral elongation spare on above-mentioned expandable part opposite side, this is because the great majority motion occurs in extensible portion.If be provided with stiffening district 52C on lateral elongation spare 52, especially the whole distal edge 56 along lateral elongation spare is provided with stiffening district 52C, just can reduce this tendency.

Figure 19 shows a kind of ideal situation among the various embodiment of the present invention, and promptly lateral elongation spare 52 and/or main part 21 comprise that some are difficult for the part or the zone of elongation than the remainder of lateral elongation part 52 or main part 21.These are difficult for elongated portion or regional 51 can be very much more smaller or little than other zone elongation, and therefore when wearing was gone up sanitary towel, under the effect of normal power, they had very little elongation or even generally do not extend.Provide a this reason that is difficult for the elongation zone to be wish for sanitary towel 20 because the surface texture of SELF tablet, this sanitary towel usually be difficult to will a kind of highly texturedization tablet (as a kind of tablet) through the SELF processing be attached on the another kind of tablet.When adopting binding agent,, therefore, desirable especially when binding agent is used for this purpose because generally treating to need face contact closely between the adhesive surface.Same reason is also wished to have the elongation zone of being difficult for when the adhesive part being placed on the short underpants side of SELF tablet.

Have found that, can will be difficult on elongated portion or 51 some positions that are arranged in the sanitary towel 20, zone and the elongation performance of this sanitary towel is not had much affect.In general, being difficult for elongation zone 51 sizes should be less and be positioned at edge part near main part 21.As shown in figure 19, these positions include, but is not limited to along or around the longitudinal edge of main part, the end margin of main part or around the periphery of entire body part.For example, be difficult for elongation zone 51 comprise main part 2l be difficult for elongation zone 51A or along the absorbent article core 42 of main part vertical side of the edge 22 (or 42C).Above-mentioned be difficult for elongation zone 51 also comprise the two ends of main part 21 or absorbent article core 42 two ends 42 be difficult for elongation zone 51B.Also be surprised to find that, utilize whole peripheral 26 the performance that is difficult for elongation zone 52 even can obtains to be satisfied with around sanitary towel.Because for adaptive with wearer's health and/or short underpants, the sanitary towel's part that is positioned at periphery 26 inboard can be extended and be more along Z direction (perpendicular to the x-y plane) elongation, is possible so it has been generally acknowledged that this.In sanitary towel, dispose also can be provided with in the district selected of adhesive part 82 and be difficult for elongated portion 51C.In addition, if lateral elongation spare is fixed on vertical side of the edge 22 near main part 21, forming the some parts that holds or pack the lateral elongation spare 51D of the parts of lateral elongation spare or bag also can be to be difficult for extending.

If be difficult for elongate member (as be fixed on the main part 21 lateral elongation spare) enough closely near the vertical side of the edge 22 of main part 21, for those relative lateral elongation spares 52, have the gap between binding site, this gap is more than or equal to about 40mm (along laterally recording).

Figure 19 A shows the additional embodiments of sanitary towel of the present invention.In the embodiment shown in Figure 19 A, only along forming deformable net structure 60 on the part of the egative film 40 in the longitudinal center district 23 of sanitary towel 20.Above-mentioned deformable net structure 60 can be shown in Figure 19 A along the length elongation of whole sanitary towel 20, perhaps only along the part elongation of the length of sanitary towel 20.On top flat 38, also can process similar decorative pattern.

The 60 longitudinal center districts 23 that are limited in sanitary towel, district that are shaped had lot of advantages.Have found that the shape the when egative film 40 with this structure can impel sanitary towel to reach as shown in Figure 5 use.This step is to second petiolarea, 30 advantageous particularlies of sanitary towel.Can believe the egative film 40 shown in Figure 19 A because the ridge 48 that forms on sanitary towel top is cooperated with the slots close that wears between the buttocks, thereby improve and the contacting of health.In a preferred variation example of this example, can not crack along some zones of the absorbent article core 42 of the vertical side of the edge of absorbent article core so that the shape when more helping making sanitary towel 20 to present as shown in Figure 5 use.Improved in this district with contacting of health and be considered to owing to compare with the respective performances of vertical lateral areas 25, longitudinally the egative film of center 23 has different elongation performances and stiffening performance.In fact the two ends of egative film 40 are securely fixed in shape when having promoted that also sanitary towel presents this use on wearer's the short underpants with fixture 84.

Because lateral elongation spare 52 can more easily be fixed on the undressed part of the egative film 40 in the vertical lateral areas 25 of sanitary towel, so for the ease of making, the embodiment shown in Figure 19 A also is desirable.In addition, be fixed on easily on the egative film 40 for making fixture 84, some regions of the ora terminalis 40D of close egative film 40 can not processed.

Figure 20 shows the shape that is used for the other lateral elongation spare 52 in the sanitary towel of the present invention.The shape of this alternative lateral elongation spare 52 shown in Figure 20 has a tab part on its distal edge 56.Because tab 108 arranged, the width of the distal edge 56 of the lateral elongation spare of the sanitary towel that distal edge 56 vertical width of lateral elongation spare roughly illustrate less than front cited accompanying drawing (as Figure 18).The shape of lateral elongation spare 52 illustrated in fig. 20 has a lot of benefits.At first, the tablet laterally outwardly of the lateral elongation spare fixture 88 in the lateral elongation spare in aforementioned figures 52 does not adhere on the downside of wearer's short underpants.These unnecessary tablets 110 are may be wrinkling when folding around the curved side edge in wearer's short underpants crotch district with lateral elongation spare 52 and produce stress on the remainder of lateral elongation spare 56.Make the shape of the distal edge 56 of lateral elongation spare 52 help reducing the stress of fold and generation owing to saved the aligned unnecessary tablet 110 tab parts 108 of these parts in the wearer's who has maximum curvature when using short underpants crotch district.Tab part 108 also provides a kind of tab that can catch easily for lateral elongation part 52, so as when to wear user can pulling they make the elongation of lateral elongation spare.

Folded sides was to the another kind of method of elongate member 52 before Figure 21 and 22 showed and uses.In Figure 21 and 22, with lateral elongation spare 52 be folded in main part 21 above bodyside 20A.To comprise the some parts of lateral elongation spare of distal edge 56 of lateral elongation spare folding or twice folded inverted, remote edge 56 is laterally outwardly extended away from main longitudinal centre line 1.Can make lateral elongation spare 52 remain on this shape in any suitable manner, for example by placing the method (as between bodyside 20A, adding paraffin wax point 112) of temporary fixing piece at lateral elongation spare 52 and main part 21.Each lateral elongation spare 52 comprises a distal portions 56E between the distal edge 56 of fold line and lateral elongation spare.Be bonded on the additional adherent layer 89 that is positioned on the lateral elongation spare proximal part 54E and these distal edge parts 56E preferably can be remained on the original place by the lateral elongation spare fixed adhesive 88 that will be positioned on the lateral elongation spare distal portions.

Also can make various alternative modification to the embodiment shown in Figure 21 and 22.For example, in some other embodiment, can be with lateral elongation spare fixed adhesive 88 and additional adherent layer 89 out of position.The distal edge 56 that also can change lateral elongation spare 52 is elongation laterally outwardly.For example, shown in the right side of Figure 22, lateral elongation spare 52 can be folded into the horizontal outermost end that distal edge 56 laterally outwardly extended exceed main part 21 or outermost end is folded in the lateral elongation spare.In addition, shown in the left side of Figure 22, the distal edge 56 of lateral elongation spare 52 needn't extend outwardly far.No matter these suitable modification how, make top flat 38 can keep clean advantage before use on the top flat 38 thereby the basic embodiment shown in Figure 21 and 22 not only has lateral elongation spare 52 covered, lateral elongation spare 52 is arranged for ease of user is caught and unfolded advantage but also have.

Figure 23,23A and 23B show the shape of other alternative, folding lateral elongation spare 52.As shown in figure 23, lateral elongation spare 52 can be folded in inwardly on the short underpants side 20B of main part 21.Lateral elongation spare 52 has a tab 118 that extends from its distal edge 56.Then that tab 118 is folded inverted, make the far-end 120 of tab constitute tab that user can catch in case pulling it and launch lateral elongation spare 52.

Can tab 118 be connected on the distal edge 56 of lateral elongation spare 52 in any suitable manner.For example, perhaps tab 118 can be made for the integral part of lateral elongation spare 52, perhaps make it to being combined in a separation member on the lateral elongation spare 52.In the preferred embodiment shown in Figure 23, tab 118 is separation members that are connected on the lateral elongation spare 52.Because the tab 118 as shown in Figure 23 B leaves wearer's thigh (dotting among the figure) when using, this shape is of great use.This can be avoided because of lateral elongation spare 52 or tab 118 and the friction of wearer's thigh the wearer being felt under the weather.

Figure 23,23A and 23B also provide the example of the sanitary towel with a kind of collapsed shape, in this embodiment, by means of the additional adherent layer 89 on the short underpants side 20B that is in main part 21 lateral elongation fixture 88 are kept collapsed shape before use.

Figure 24 shows another kind of alternative lateral elongation spare 52 embodiment.Lateral elongation spare shown in Figure 24 52 comprises two (or a plurality of) weakened section or deformed area.In the embodiment shown in Figure 24.Weakened section is a zones of extensibility 130, rolls or these districts are carried out " SELF " PROCESS FOR TREATMENT (or adopting other suitable manner) by the ring ingot to make their attenuation.Above-mentioned zones of extensibility 130 comprises the first district 130A and the second district 130B that is arranged on lateral elongation cross central line (or flap transverse centerline) T1 both sides.

Preferably make the first district 130A and the second district 130B longitudinal edge 22 elongations along main part 21.As shown in figure 24, in lateral elongation spare transverse centerline ₁Between tensile first and second districts the zone in an interval (as shown in figure 24) can be arranged.In further embodiments, the first district 130A and the second district 130B can also be neighbouring relationship.The first district 130A and the second district 130B can be longitudinally from lateral elongation spare transverse centerline ₁Extend to the end margin 57 of lateral elongation spare.In addition, in the embodiment that some are recommended at least, can roll in the end at least one district of zones of extensibility with without the ring ingot or the neighboring terminal edge 57 of the lateral elongation spare that SELF handles between be provided with a gap.Above-mentioned zones of extensibility 130 can be any suitable width, but above-mentioned district's 130 the width (recording perpendicular to the adjacent vertical side of the edge 22 of main part) of stretching is preferably between about 4mm and the about 20mm.

In the embodiment shown in Figure 24, the ring ingot roll or the fold line 132 of SELF process distortions in handling with respect to main longitudinal centre line L A (inwardly) at angle.Tensile fundamental component is folding or hook 132 perpendicular to these.Therefore, the first district 130A has tensile fundamental component D ₁, the direction of this component is roughly parallel to adjacent vertical edge 22 of main part 21.The second district 130B has tensile fundamental component D ₂With the trend with respect to main longitudinal centre line fold line or hook 132 at angle.Less than 90 °, preferably between about 30 ° and about 60 °, be most preferably 45 ° greater than 0 ° with the fold line 132 formed angle A that illustrate that the ring ingot rolls or the SELF PROCESS FOR TREATMENT is out of shape with respect to main longitudinal centre line L.Two angles are 45 ° in this most preferred embodiment, and the trend of the fold line in the fold (or ridge) 132 is perpendicular to one another.The main elongation component in above-mentioned two districts also is perpendicular to one another.

Lateral elongation spare embodiment shown in Figure 24 presents very good performance.Specifically, each district in these districts, the first district 130A and the second district 130B can extend so that reduce stress, and when the curved side edge of the short underpants that lateral elongation spare 52 centered on the wearer was folding, above-mentioned stress was on lateral elongation spare 52.But, because the elongation in first district and second district is opposite each other and preferably cancel each other out, so under the power effect relevant with the short underpants of being worn, lateral elongation spare 52 is totally roughly not extending.

Lateral elongation 52 shown in Figure 24 preferably includes at least three zones with different stiffening characteristics and compliant characteristic.The above-mentioned first district 130A and the second district 130B preferably define out the first district I of the compliance of lateral elongation spare 52.The zone that the submissiveest of some lateral elongation spares is arranged and dangle most.The distal edge district 52C of lateral elongation spare 52 preferably defines out the 3rd district III, and these districts are some stiffening districts of lateral elongation spare 52.As noted earlier, this can make lateral elongation spare 52 have bigger fastness and be convenient to operation.The mesozone and the distal area that are arranged on the lateral elongation spare between first and second districts limit the second submissive district II.These intermediary second district II are preferably submissive, but preferably have medium compliance, and promptly its compliance is bigger than distal area, but more weaker than the compliance in tensile first and second districts.

The bending rigidity that the first district I has (Flexural Rigidity) it is desirable to be less than or equal to about 300mg-cm, and preferably its bending rigidity is about 30mg-cm.Preferably, the 3rd district III has the bending rigidity more than or equal to the first district I, and more than or equal to about 400-500mg-cm, preferably its bending rigidity equals about 1600mg-cm.The upper limit of its bending rigidity can be up to about 4000mg-cm.

Also can otherwise obtain the characteristic that presents by lateral elongation spare 52 illustrated in fig. 24.In other words, the structure with these characteristics has more than and is limited to by the ring structure that ingot rolls or the SELF PROCESS FOR TREATMENT is obtained.Figure 24 A shows another kind of embodiment, and in this embodiment, lateral elongation spare 52 has some otch or narrow slits that occur with the form of Argyle.Decorative pattern shown in Figure 24 A can also turn to, and makes lozenge diagram with any other suitable manner trend.In some other alternative embodiment, can make lateral elongation spare 52 have suitable decorative pattern with the method for embossing rather than the form of incision.All this class embodiment preferably are processed with weakened section (its effect resembles some raps and meets the district), so that the part of lateral elongation spare can be folding along any direction.Obviously, with as shown in figure 24 big-pattern, or the big-pattern that comprises small deformation or be similar to the whole area distributions of crossing lateral elongation spare 52 shown in Figure 25 all can obtain similar effects.So in any zones of extensibility that forms tensile fundamental component (or having some component at least) is arranged all preferably, these components (preferably are perpendicular to one another) toward each other, and making not, the elongation of same district disappears at least in part each other mutually.

Figure 25 and 26 shows the embodiment of selectable lateral elongation spare 52.Embodiment as shown in figure 25 comprises and a pair ofly rolling or the fan section that separates 140 of SELF PROCESS FOR TREATMENT through the ring ingot that they are in lateral elongation spare transverse centerline ₁Relative both sides.Lateral elongation spare 52 shown in Figure 25 and 26 has unnecessary or loose tablet 144 along the distal edge 56 of lateral elongation spare 52.These unnecessary tablets are called as " tubaeform part " (employed term in the clothing process industry).Above-mentioned loose tablet 144 is by extending, and as described in connection with Fig. 14 the arc proximal edge 54 of lateral elongation spare is attached on the main part 21 then to form.The distal edge 56 of lateral elongation spare 52 is not extending or not extensible.Lateral elongation spare 52 is phozy or open narrow slit also.Therefore, lateral elongation spare 52 also can not bounce back, when along the edge of wearer's short underpants when pleated, this lateral elongation spare can provide no-float, smooth flat surface.

When sanitary towel 20 is launched to be placed on the plane surface, its egative film leveling and flattens the end 57 of lateral elongation spare on table top on a plane surface S (as a table top), and 144 of loose tablets are positioned at outside the plane that the surperficial S by table top limits.When being pressed together, can measure loose tablet the loose tablet distance that is positioned at outside the plane that is limited by mesa surfaces S.The size that under this condition, illustrates more preferably greater than or equal about 10mm (or equal total tubaeform part, this tubaeform part is more than or equal to about twice of above-mentioned size, or 20mm).The advantage of sanitary towel shown in Figure 24 is can be with loose tablet 144 levelings, so that adaptive with short underpants better when the edge fold of the short underpants that lateral elongation spare 52 centered on the wearer.The leveling that realizes this lateral elongation spare 52 can not make 52 stretching, extensions of lateral elongation spare or other elongation.

H, be used for sanitary towel is fixed to fixture on wearer's short underpants

As mentioned above, the short underpants face of the underwear face 20B of sanitary towel 20 and lateral elongation spare 52 can comprise and is used for sanitary towel is fixed to fixture 82 on wearer's short underpants.As shown in Figure 4, sanitary towel 20 preferably is furnished with two end fixtures 84 at least, and this two fixture is applicable to main part 21 following sanitary towels are fixed in the crotch district of short underpants.The fixture that end fixture 84 is preferably not extending, for example not extending binding agent blow-out patch.End fixture 84 is used for the two ends of main part are securely fixed in wearer's short underpants.Above-mentioned not extending end fixture 84 can be any binding agent or the glue that use in the art that is used for this purpose, wherein is preferred with the contact adhesive.A kind of 3Sigma3153 of binding agent that is applicable to the end for producing by 3Sigma.Other the adhesive part that is fit to has description in No. 4917697, United States Patent (USP).

Preferably a kind of tensile fixture of periphery fixture 86, for example a kind of tensile binding agent.The extending performance of periphery fixture 86 helps to make during use that part of sanitary towel elongation between the two ends of main part 21.A kind of suitable tensile binding agent that is suitable for use as peripheral fixture 86 is to make the Fuller2238 hotmelt by H.B.Fuller Co.of St.Paul Minnesota, and this binding agent is applicable to spiral pattern.

Illustrate other suitable fixture shape in following patent application, these patent applications are to be called the pct international patent publication number WO92/04000 of " Shape and AdhesiveFastening Meas for an Absorbent Article " on March 19th, 1992 with the disclosed name of people's such as Papa name; With people's such as Olsen name disclosed PCT publication number WO93/01783 with the disclosed PCT publication number of people's such as Osborn name WO93/01785.

It should be noted, be tensile if make the parts (with any coating member) that form sanitary towel's underwear face on wearer's short underpants, and the concrete binding agent shape that then can adopt depends on whether use tensile or not extending binding agent.That part of of sanitary towel that is furnished with extending binding agent in the above is tensile.Comprising not, those parts of the sanitary towel of extending binding agent can only be tensile between not extending binding agent blow-out patch usually.Therefore, if use not extending binding agent, preferably binding agent is painted discontinuous decorative pattern, these decorative patterns include, but is not limited to alternate point, alternate etc., so that sanitary towel extends between the binding agent blow-out patch.Otherwise,, then can paint successive or alternate decorative pattern to binding agent by above-mentioned shape (with other shape) if binding agent is tensile.If binding agent is tensile, the elongation that preferably makes these binding agents equates with the elongation of the sanitary towel that provides in the table 1 approx.

In addition, can replace binding agent with the fixture of other type, or use with binder combination.Preferably the fixture of these other types is arranged to be similar to the decorative pattern described in the patent publication us of quoting in the above.These fixtures include, but is not limited to: traditional VELCRO hook tablet, the tablet of the fixture described in the following patent literature or the foam of great friction coefficient and other great friction coefficient, above-mentioned patent documentation: No. 4946527, the United States Patent (USP) that is issued to Battrell August 7 nineteen ninety; Be issued to people's such as Thomas United States Patent (USP) No. 5058247 and No. 5116563 respectively on October 22nd, 1991 and on May 26th, 1992; August 8 nineteen ninety disclosed EPO patent application publication number 0381087.These fixtures can also be made tensile, as described in the U.S. Patent application serial number 07/915133 (PCT publication number 93/01785).

As mentioned above, lateral elongation spare 52 can be a gusset spare itself, and they should be folding around the lateral edges of wearer's short underpants, and keep folded state, and needn't be provided with sanitary towel is fixed to fixture on the short underpants.But, in some other embodiment of the present invention, can be provided for the optional fixture of additional fastening in the above.Above-mentioned optional lateral elongation spare fixture 88 can be the fixedly tablet of any kind that specifically provides in this description.Optional lateral elongation spare fixture helps lateral elongation spare 52 is being encased the location, back along short underpants crotch portion.Lateral elongation spare fixture 88 can be positioned on the underwear face of gusset spare 52, the distal edge 56 of contiguous gusset spare 52 or other different parts on lateral elongation spare (intersecting part as the elastic edge near lateral elongation spare and short underpants).

I, other alternative embodiment

It should be noted that in other embodiments, any fixture of embodiment more described herein can be made up to produce some other embodiment with any suitable style.

The present invention also is applicable to other class absorbent device that is worn on short underpants crotch district, as pantiliner and incontinence patient's articles for use." panty-liners " or " pantiliner " refers to than the general little absorbent device of sanitary towel's volume that wears of gynecologic menstrual herein.Can dispose in No. 4738676, the United States Patent (USP) that name that the suitable absorbent device example of the pantiliner form of fixture of the present invention has been issued to Osborn on April 19th, 1988 is called " Pantiliner " description is arranged.

" incontinence patient's articles for use " refer to pad, underwear (by the fixing in-situ pad of various types of suspension members (as band etc.)), be used for the plug-in unit of absorbent device, be used to increase the auxiliary member, brief, mattress of the moisture absorption capacity of absorbent device etc., and with to be that adult or other incontinence patient wear these articles for use irrelevant.The example of articles for use that can dispose the suitable incontinence patient of fixture of the present invention has been issued to people's such as Feist No. 5300054, United States Patent (USP) and had been issued on April 19th, 1994 in people's such as Noel No. 5304161, the United States Patent (USP) and described to some extent on April 5th, 1994.

3, test ten thousand methods

The step of the bending stiffness of the zones of different of measurement lateral elongation spare is as follows:

Reference

ASTM (American Standard of Testing Materials) method B1388-64: the standard method of fiber stiffness test (described herein is the method for remodeling).

Principle

This test is according to the cantilever beam principle.Before bending to 45, measures by sample the elongated distance of strip specimen outside flat roof area.Utilization under the experimental condition of standard under the effect of deadweight the crooked or sample weight that records when dangling a given angle of sample and the interaction between the sample stiffness calculate bending stiffness.

General content

A kind of method of the compliance of the stiffness of sample and a certain parts of sample is just measured in the fabric test of dangling, and this method should be carried out as far as possible continuously, certainly, can suitably append additional testing in case of necessity.For example, the test of only sample being carried out on vertical and horizontal is described.

Usually, with placing up towards health one side of a sample band, only test once.Equally to the sample ribbon gymnastics that is used for this test as the time answer extreme care, prevent that it is folded, wrinkle, bending etc.If manufacturer is packaged into collapsed shape with sample, it should be flattened lightly during test.If can only buy folding product, can measure proximate bending stiffness from obtaining sample between two fold lines.If can not then can the orientation through adjusting sample make folding part inwardly at the trial up fully with the folding elimination on the sample, measure then, so that folding influence reduces to minimum.

Device

The structure of cantilever beam testing machine test machine as shown in figure 27.

1 inch wide sample cutting device JDC cutting device, from Thwing-Albert InstrumentCompany, Philadelphia, Pennsylvania buys.

It is 4.0 ± 0.1 or 6.0 ± 0.1 inches sample that its size of trimmer is suitable for cutting length.

The air-conditioned room room temperature is 73 ± 2 °F, relative humidity 50 ± 2%.

Zero state eliminostatic spray wheel (Zerostat Anti-Static Pistol) (free)

In order to eliminate the static on cantilever beam and/or the tulle.In the U.S. by Discwasher, Inc., Columbia MO65201 supplies with.Also can be from Morgan Instruments, Inc., PO.Box 46442,113 Circle Freeway Dr., Cincinnati, the Morgan Catalog No70-35-00 that OH45246 buys also can buy from recording equipment shop and photographic equipment supply station.Is satisfied with this spray wheel for the static in eliminating this test, does not necessarily eliminate the static that dangles in testing with fiber softener.This destatics the description operation of writing according to manufacturer and eliminates the spray wheel.

Specimen preparation

Sample should be placed on that to have amount of air circulation maximum and humidity and temperature conditions are obtained on the zone in equilibrated room to greatest extent.

From the typical sample upper edge vertical and horizontal of four tested absorbent devices carefully cut out one wide be the sample bar (or wide as far as possible sample bar) of 1 inch (2.54cm).Need adjust the length and the width of sample, the appropriate area of side direction elongate member be tested being suitable for.Begin to cut out out the sample bar, make these sample bars certain to the length of opposite edges from an edge in tested district.At one end go up very light terrestrial reference outgoing direction (the LD representative is vertical, and the TD representative laterally) with alphabetical LD or TD.

On fully perpendicular to sample bar length range, carefully cut out at an end of contiguous sample bar with trimmer.Importantly should on fully perpendicular to sample bar length range, cut out.After cutting out out the sample band, at one end mark lightly and cut out direction.

Operation

Determine the quantitative (mg/cm of sample with the other parts for the treatment of test sample ²).

Cantilever beam testing machine 130 (Figure 27) should be placed on the testing stand in the place ahead that faces the operator.Testing machine should lie in a horizontal plane on the table top, and by small-sized bubble type leveler 132 its horizontalities of indication that place top, testing stand should be quite good with the vibration isolation, and it is overheated can not to be subjected to, and the most important thing is and can not be stretched.It also is very important making duration of test not have air-flow directly or indirectly to blow to testing machine, because the vibration of sample bar is very big to the influence of result of the test.

When testing, the operator can be sitting in or stand in the front of testing machine.After the operator has selected the comfortable position of station (or seat) before testing machine, must regulate the mirror 134 on the testing machine, the top edge of two horn shape plastics wings 136 that extend from testing machine one end is looked is aligned or overlap, and forms a single plane.

Sample groove 130 from the upper brace that is arranged in the cantilever beam testing machine takes off sample slide bar 138.One in the test sample bar 52 is placed on the sample groove, one of this sample bar is corrected with that vertical edge that links to each other with two horn shape wings of testing machine flush.Attention should make the sample groove slightly be wider than 1 inch sample.Sample bar centring is placed, it is not touched with two side edge of sample groove.Very carefully the sample slide bar is put back into the top of sample bar, the leading edge that makes slide bar is also aimed at the edge of sample bar in the testing machine.The sample bar is near two gages 162 that are separately fixed at each side of sample groove.Must place sample slide bar 158 very carefully, so that sample do not produce wrinkle (wrinkle herein be not meant relevant with the lateral elongation tablet inherent wrinkling) or move, and the zero graduation on a gage or another gage is also just in time alignd forward with straight line on the sample slide bar.

With the actuator 144 of an end in contact of sample slide bar on apply very little pressure at leisure, and make the sample slide bar move (that end towards the testing machine that contacts with both wings moves) very slowly and reposefully forward with the speed (0.85cm-1.3cm) of the about 1/3-1/2 inch of per second.When the sample slide bar was mobile forward, sample should move with the slow rate that equates.When the sample slide bar is pushed away forward, by with of two indicatrixs on the sample slide bar being the tendency toward sliding that the sample bar can be understood in position that reference line is observed the sample bar.When sample slide bar and sample bar stretched out the edge of testing machine, the sample bar began bending immediately or at last or dangles down.Continue mobile sample slide bar.As long as the leading edge of the absorbent article core of sample bar drops to the same high with 45 ° of reference lines of observed both wings from mirror formed single (overlap and aim at), just stop mobile sample slide bar.It should be noted that the sample bar comprises fold line if owing to the condition of the product of having bought from manufacturer is limit there, then should test the representative cross section that does not have crooked sample bar at the fold line place as far as possible.If can not eliminate fold line, then undertaken by said process.Just in case sample begins twisted, then when the mid point of above-mentioned leading edge is cut apart the reference line that is formed by both wings, stop to slide.If twistedly this sample is scrapped repeated trials on another sample bar greater than 45 °.

The sample bar hang down into make the absorbent article core leading edge drop to 45 ° of the same high required degree of reference line after, the sample slide bar stops, and determines the stroke of sample.The sample that marks on the sample dangles a little.

Then, measure the length of sample overhang from the sample that the marks end margin of sample that dangles a little.Cut the sample overhang in the part of marking again.Weigh up the weight (g) of remaining sample and calculate the quantitative of sample bar.Absorbent article core for a particular type carries out four tests in each direction (LD and TD) total.Write down the submissiveest direction in this district.

Calculate

The equation that is used to express bending stiffness is as follows:

G＝W(L/2) ³

Wherein: G equals bending stiffness, and W is the quantitative (with mg/cm of this sample ²Meter),

L is overhang length (cm), and result's dimension is mg-cm.

All patents of being mentioned in the present patent application, patent application (any patent in this regard and any relevant disclosed foreign patent application) and public publication are the application's pertinent literature.But clearly, any list of references relevant with the application all do not have to describe and disclose content of the present invention.Obviously, content of the present invention is not yet described and disclose to any commercially available material of the present invention's description or product.

Though top diagram and described specific embodiments more of the present invention,, obviously, those of ordinary skill in the art can make various variations and remodeling under the situation that does not exceed design of the present invention and scope.

Claims

1, the absorbent device on a kind of short underpants of the crotch district that is used in user with a pair of lateral edges, this absorbent device has a main longitudinal centre line, a main cross central line, a longitudinal size and the lateral dimension along transverse extension that longitudinally extends, and described absorbent device comprises:

A main part that comprises absorbent article core, described main part have one towards bodyside, one towards short underpants side and a pair of vertical side of the edge; And

The a pair of lateral elongation spare that is used to be folded in around wearer's short underpants lateral edges, linking to each other and the vertical side of the edge that laterally outwardly extends beyond main part arrives distal edge of described lateral elongation spare and main part towards the underwear side, wherein at least one lateral elongation spare comprises one first district and one second district, when lateral elongation spare extends, above-mentioned first district roughly is in the horizontal inboard of main part vertical side of the edge, when lateral elongation spare extends, above-mentioned second district is positioned at the outside of vertical side of the edge at least in part, first district and second district of at least one in the wherein above-mentioned lateral elongation spare are tensile, above-mentioned first district has one, and trend is for extending principal component longitudinally usually, and above-mentioned second district has one to move towards to be horizontal elongation principal component usually.

2, absorbent device as claimed in claim 1 is characterized in that: during wearing sanitary towel, when masterpiece was used in the sanitary towel, main part roughly was not extending.

3, absorbent device as claimed in claim 1 is characterized in that: during wearing sanitary towel, when masterpiece was used in the sanitary towel, main part was tensile.

4, as absorbent device as described in the claim 3, it is characterized in that: above-mentioned lateral elongation spare comprises proximal edge, distal edge and pair of end portions, above-mentioned end links to each other towards the underwear side by tensile connector and main part, and the main cross central line of the trend of above-mentioned tensile connector and this absorbent device at angle.

5, absorbent device according to claim 1, it is characterized in that: at least one lateral elongation spare comprises a wadding net tablet with deformable net structure of obvious zones of different, when the axial tension of the direction that is subjected to being parallel to predetermined shaft, with respect to the axial tension that predetermined shaft is suffered along at least one, this wadding net tablet presents at least two sections controllable resistance, above-mentioned obvious zones of different comprises at least one first district and one second district, when above-mentioned wadding net tablet was in unstretched state and is being parallel to above-mentioned predetermined shaft direction and measures, the surface-pathlength in first district was less than the surface-pathlength in second district.

6, absorbent device as claimed in claim 1, it is characterized in that: in first district of lateral elongation spare, above-mentioned wadding net tablet has a longitudinal axis that is parallel to the main longitudinal centre line of absorbent device usually, the net structure of above-mentioned wadding net tablet comprises the shaped portion of matrix tablet, first district of above-mentioned net structure comprise some be roughly planar, linear zone, the axis alignment of these zones and wadding net tablet, above-mentioned second district comprises some crushed elements, these parts are moved towards the longitudinal axis of cardinal principle perpendicular to wadding net tablet, in second district, the wadding net materials comprises a similar shaped portion of first district's shaped portion to lateral elongation spare.But the longitudinal axis of above-mentioned wadding net tablet is usually perpendicular to the main longitudinal centre line of absorbent device.

7, absorbent device as claimed in claim 1 is characterized in that: at least one lateral elongation spare comprises a stiffening district along this lateral elongation spare distal edge.

8, absorbent device as claimed in claim 1, it is characterized in that: at least one lateral elongation spare be folded in main part below the medicated underpants side, forming a satchel, and above-mentioned at least one lateral elongation spare is inserted in the above-mentioned satchel at least in part.

9, a kind ofly be used to be through the having of wearer with the absorbent device in the short underpants in the crotch district of a pair of lateral edges, this absorbent device has a main longitudinal centre line, a main cross central line, a longitudinal size and the lateral dimension along transverse extension that longitudinally extends, and above-mentioned absorbent device comprises:

A main part that comprises absorbent article core, one of aforementioned body part tool towards bodyside, one towards short underpants side and a pair of vertical side of the edge; And

The a pair of lateral elongation spare that is used to be folded in around wearer's short underpants lateral edges, linking to each other and the vertical side of the edge that laterally outwardly extends beyond main part arrives distal edge of above-mentioned lateral elongation spare and main part towards the short underpants side, wherein at least one lateral elongation spare links to each other in vertical junction with main part, this lateral elongation spare extends towards main longitudinal centre line from above-mentioned junction, and it is folded inverted and form a folded part along a fold line, therefore the distal edge of this lateral elongation spare is left main longitudinal centre line and is laterally outwardly extended, above-mentioned lateral elongation spare not by this folding be fixed to main part towards the underwear side, therefore, when applying laterally outwardly a pulling force on lateral elongation spare, above-mentioned folded part can launch and along horizontal expansion.

10, a kind ofly be used to be through the having of wearer with the absorbent device in the short underpants in the crotch district of a pair of lateral edges, this absorbent device has a main longitudinal centre line, a main cross central line, a longitudinal size and the lateral dimension along transverse extension that longitudinally extends, and above-mentioned absorbent device comprises:

A main part that comprises absorbent article core, aforementioned body partly have one towards bodyside, one towards short underpants side and a pair of vertical side of the edge; And

The a pair of lateral elongation spare that is used to be folded in around wearer's short underpants lateral edges, above-mentioned lateral elongation spare links to each other with main part, and the vertical side of the edge that laterally outwardly extends beyond main part arrives distal edge, wherein the first of antermarginal at least one lateral elongation spare of close above-mentioned lateral elongation spare is folded in the above-mentioned on bodyside of main part towards main longitudinal centre line, and easily adhere to thereon with unloading, to comprise that the second portion of lateral elongation spare of distal edge of lateral elongation spare is folded inverted along in the first of the direction of leaving main longitudinal centre line, so that before use this lateral elongation spare is remained on collapsed shape.

11, a kind ofly be used to be through the having of wearer with the absorbent device in the short underpants in the crotch district of a pair of lateral edges, this absorbent device has a main longitudinal centre line, a main cross central line, a longitudinal size and the lateral dimension along transverse extension that longitudinally extends, and above-mentioned absorbent device comprises:

The a pair of lateral elongation spare that is used to be folded in around wearer's short underpants lateral edges, the vertical side of the edge arrival distal edge that above-mentioned lateral elongation spare links to each other with main part and also laterally outwardly extends beyond main part, above-mentioned lateral elongation spare has a cross central line, wherein at least one lateral elongation spare comprises at least two zones of extensibility, wherein at least one above-mentioned zones of extensibility is positioned at each side of cross central line of lateral elongation spare of the vertical side of the edge of contiguous main part, wherein the elongation in one of tensile above-mentioned district is opposite with the elongation at least one tensile another district, therefore, the general extension of above-mentioned lateral elongation spare is less than the elongation sum in tensile above-mentioned district.

12, a kind ofly be used to be through the having of wearer with the absorbent device in the short underpants in the crotch district of a pair of lateral edges, this absorbent device has a main longitudinal centre line, a main cross central line, a longitudinal size and the lateral dimension along transverse extension that longitudinally extends, and above-mentioned absorbent device comprises:

The a pair of lateral elongation spare that is used to be folded in around wearer's short underpants lateral edges, above-mentioned lateral elongation spare comprises and links to each other with main part and laterally outwardly extend beyond the proximal edge that the main part vertical side of the edge arrives distal edge, wherein above-mentioned lateral elongation spare comprises at least three submissive districts: first district of the antermarginal at least a portion of the above-mentioned lateral elongation spare of vicinity, second district that is positioned at the lateral outer side in first district at least in part, adjacent side is to the 3rd district of at least a portion of elongate member distal edge, first district has the highest compliance in three districts, the compliance in second district is between the compliance in first district and the 3rd district, and the 3rd district has minimum compliance in three districts.

13, a kind of absorbent device that is used to be through in the short underpants, above-mentioned absorbent device has longitudinally longitudinal size, edge laterally lateral dimension, the longitudinal center district that one extends longitudinally and several in vertical lateral areas of longitudinal center's district's lateral outer side of trend of trend, and above-mentioned absorbent device comprises:

A main part, this part comprises a saturating liquid top flat, a liquid-tight egative film, absorbent article core between top flat and egative film, a pair of vertical side of the edge, the fixture of pair of end edge and each end margin of vicinity, wherein, under the effect of the power that above-mentioned top flat and absorbent article core produce when wearing this absorbent device at least the longitudinal center district at this absorbent device be tensile, under the effect of this power, the longitudinal center of egative film part longitudinally center is tensile, and with the elongation of the some parts of the aligned egative film in vertical lateral areas of absorbent device elongation less than this egative film longitudinal center part.