MX2010013786A - Better fitting diaper or pant with absorbent particulate polymer material and preformed crotch. - Google Patents

Abstract

A disposable absorbent article includes an absorbent core and a chassis that includes a topsheet and a backsheet, with the absorbent core located between the topsheet and the backsheet. The chassis includes an absorbent core which includes an absorbent particulate polymer material, the absorbent core being located between the topsheet and the backsheet, and wherein the absorbent core includes at least one strip extending through a portion of a crotch region of the article. The article also includes at least one longitudinally oriented crease passing through a portion of the crotch region, wherein a concave shape is formed within the article.

Description

DIAPER OR SHOE WITH BETTER ADJUSTMENT WITH PARTICULATED ABSORBENT POL1 MATERIAL AND PRE-WRAPPED REGION FIELD OF THE INVENTION The invention relates, generally, to an article, in particular, to a disposable absorbent garment with an absorbent mat and a preformed crotch region.

BACKGROUND OF THE INVENTION Absorbent articles, such as disposable diapers and underwear for adult incontinence, absorb body dies. These articles have the function of preventing them from exuding, moistening or in any other way contaminating garments, such as bedding, which come into contact with the disposable usuor, such as a disposable diaper, can be worn by Orb liquid and swells, and can be more effective if it is placed orbent in a certain pattern or arrangement that provides optimum absorbency. Accordingly, it may be desirable for the absorbent mat to be fixed at a particular location in an article, it is desirable that the absorbent particulate polymer material is the absorbent article such that the polymer material is immobilized when the absorbent article is present. dry and also.

In addition to being absorbent, the absorbent articles, such should be conveniently thin and flexible, for ease of use and for more convenient packaging and storage and pullers, often used in large quantities, as well. Some technologies for immobilizing the polymeric material in an absorbent article add volume to the next abs article, increase the thickness, reduce the flexibility and / or absorbent increase. Other technologies for immobilizing absorbent matting in an absorbent article may not be so BRIEF DESCRIPTION OF THE INVENTION The embodiments of the invention may treat one or more of the above and may provide an absorbent particulate absorbent garment and a preformed crotch region. In provides a disposable absorbent article. The article may be in orbent with a structure that may include a top canvas and an absorbent leo canvas located between the upper canvas and the lower canvas. The discharge of an absorbent core including a particulate polymeric absorbent material is located between the upper canvas and the lower canvas. The absorbent material includes at least one strip that extends through the crotch region of the article. The article may also include, as it is oriented longitudinally passing through a portion of the recess, where a concave shape is formed within the article.

Methods for making the article are also provided.

Other characteristics and advantages of the invention could derive from the reading of the following detailed description, figures and claim with one embodiment of the invention.

Figure 4 is a cross-sectional view of a shell shown in Figure 3 taken along the line of ura 3.

Figure 5 is a top view of another core layer with an embodiment of the invention.

Figure 6 is a schematic illustration of a leopard absorbent process in accordance with one embodiment of this invention.

Figure 7 is a partial sectional view of a leopard absorber according to one embodiment of the invention.

Figure 8 is a perspective view of the print roller of Figure 7.

Figure 9 is a partial sectional view of the roller of Figure 8 showing a receptacle of polymer material orbent.

Figure 10 is a perspective view of the sop roller 8.

Preformed crotch ion can provide convenient disposable orbent improved compression capabilities, ideatability to the wearer's body, for greater comfort, if a leakage rate from the disposable absorbent article.

Section A below describes the terms for and understanding the features of the invention, but without introducing limits inconsistent with the context with those used in section B is a detailed description of absorbent articles in accordance with embodiments of this invention. . Section C describes ricar absorbent cores and absorbent articles in accordance with this invention.

Terms "Absorbing article" refers to devices that absorb body data and, more specifically, refers to devices tra or in proximity to the user's body to absorb and contain discharged data from the body. The absorbent articles could be an absorbent polymeric material located on one or more substrates and an oplastic located on the absorbent particulate polymeric material and the formation of one or more substrates to immobilize the polymeric material from one or more substrates. In a multi-layer absorbent core, the core also provides a cover layer. One or more substrates and the C layer will light a non-woven fabric. In addition, the absorbent core is practical. The absorbent core does not include a catchment system, a lower liner of the absorbent article. In a given embodiment, the system consists, practically, of one or more substrates, the polymeric thermoplastic position material and, optionally, the cover layer.

"Absorbent polymeric material", "M-gelling material", "superabsorbent" and "superabsorbent material" are used interchangeably and refer to polymeric materials and must absorb at least 5 times their weight of a saline solution in order to measure carried out with the proof of the capacity of retaining 441 .2-01).

"Absorbent particulate polymeric material" is used in the rapporteur, but does not exclude the presence of other characteristics, ments, stages or components known in the industry or desment.

"Concave" is used in the present description to describe that it bends, narrows, or in any other way inclines lig ntro. They can be examples of suitable concave shapes, but without limitation V, a U shape, and any other similar shape that folds, narrowly inward.

"Which consists practically of" is used in the present text to cover the scope of the subject matter of the invention, such as that of a reivi or specific stages and those that do not affect basic and novel matter of the object.

"Disposable" is used with its common meaning to refer is discarded or eliminated after a limited number of ration events, for example, less than about 20 event about 10 events, less than about 5 events about 2 events.

It is at least 150% of its original length not stretched without an astrophysic one after the application of tensioning force, and it will practice the original length or it will approach its original length after it cuts.

The terms "fiber" and "filament" are used interchangeably.

A "non-woven fabric" is a canvas, weft or wadding made directionally or randomly, joined by friction, cohesion and / or adhesion and woven products, knitted fabrics, by carpet-like knots, cost include yarns or filaments of union or wet felted, indepen also, sewn with needle. The fibers could be natural, they could be shortened or continuous filaments or they could be formed, they have diameters that vary from less than approximately 0.2 mm and they occur in several di erent forms (known as chopped or cut fibers), simple continuous fibers. Laments), non-braided bundles of continuous filaments (tow) and h continuous filaments (yarn). Non-woven fabrics can be formed by v S as melt blown, spun bond, formed by solvent any suitable technique including, but not limited to, joining using indexable and / or non-resettable joints (eg, cost). adhesive or cohesive, fastener, etc.). A brief may be anywhere along the circumference of the article (eg, secured at the front of the waist). Although in the present description "pants" or "pants", pants are also known as closed diapers "" presumed diapers "," diapers type pants "," diapers "and" pants diapers ". The right pants are from the USA. UU no. 5,246,433 issued to Hasse et al. on 21 of 3; US patent UU no. 5,569,234 issued to Buell et al. 2 96; US patent UU no. 6, 120,487 awarded to Ashton on 19 of 0; US patent UU no. 6, 120,489 granted to Johnson and September 2000; US patent UU no. 4,940,464 granted a. on July 10, 1990; US patent UU no. 5,092,861 grants. on March 3, 1992; US patent publication UU no. entitled "Highly Flexible And Low Deformation Fastening Device" June 2002; US patent UU no. 5,897,545 issued to Klin "Adhesive thermoplastic material", as used in the invention, comprises a polymeric composition from which they are applied to the superabsorbent material for the purpose of absorbing immobilizer in the dry and wet state. The thermoplastic material of this invention forms a fibrous network on the superabsorben material In the present description, the terms "thickness" and "ca istintamente.

Absorbent articles Figure 1 is a plan view of a diaper 10 of conformity of the invention. The diaper 10 is illustrated in its extended state and go, without induced elastic contraction) and some portions of the diaper 10 e to show more clearly the underlying structure of the diaper 10. portion of the diaper 10 that remains in contact with a wearer is in the ori ervator. The diaper 10 could, generally, comprise an orbiting structure 14 placed in the structure. The absorbent core 14 may in 15. The strip 15 may be a discontinuity in a long homogeneous member of the transverse axis 100 of the absorbent core 14. As is ura 4, which is a sectional view taken along the line 3, compressed strip 15 is a slightly compressive portion 14 relative to the other non-compressed material that compresses orbiting 14. In other embodiments a compressed pull may displace nsversal 100 and / or may be segmented into multiple parts. The strand can be made from, for example, rolling rolls. For example, in Figure 5, an absorbent core 14 can be compressed strip, for example, two compressed strips 102 and 104 parallel to each other. and along the transverse axis 100 of the absorbed core The structure 12 of the diaper 10 in Figure 1 could be purchased from the diaper 10. The structure 12 could comprise a cover of an upper canvas 18 which could be permeable to liquids or a li could be impervious to liquids. The absorbent core 14 could be the upper canvas 18 and the lower canvas 20. The structure 12 could be the side 22, elasticized leg folds 24 and a characteristic 26. adjustment and containment (elastic waist feature 26). The bracket 34 is that portion of the diaper 10 that, when the diaper 10, generally falls between the legs of the wearer.

The diaper 10 is shown in Figure 1 with its axis transverse axis 38. The periphery 40 of the diaper 10 is defined by the diaper b 10, wherein the longitudinal edges 42 extend, alleles to the longitudinal axis 36 of the diaper 10 and end edges 4 on the longitudinal edges 42 generally parallel to the transverse axis The structure 12 could also comprise a fastening system for at least one fastening member 46 and at least one bent portion 48.

In certain embodiments, an absorbent core 14 may be oriented substantially parallel to the longitudinal axis 14. The length of the compressed strip 15 may, for example, be within or through the crotch region 34 of the core between ends of the core. of the diaper 10. In certain example embodiment, in Figure 5, the multiple compressed strips 102, 104 puses 49 are oriented substantially parallel to the longitudinal axis 36 and cytically between the end edges 44. In certain embodiments one may extend, generally, in directions along the long axis extend partially between the end edges 44. In some or more folds, multiple longitudinally oriented longitudinal folds 36 may be included and practically extending between the edges in one or more folds may be slightly shifted 100 and / or or each fold can be segmented into multiple parts in the modality of Figure 1, the crease 49 can extend across the compressed strip 15. In certain embodiments a crease 49 putatively across the multiple compressed strips, or in some which may extend adjacent to multiple compressed strips.

For certain embodiments when the absorbently non-compressible core, such as a free air filter core, is made of wood pulp or cellulosic material, a fold 49 may be inclined that is not illustrated in the figures. The auxiliary adhesive may be 49 when the diaper 10 is folded or compressed along 60,003 and 5,151,092.

For the purpose of retaining the diaper 10 around us a portion of the first waist region 30 could be attached by means of fastening 46 to at least a portion of the second waist region (s) for the legs and waist of the body. Article. When fastened, the system places a tension load around the waist of the article. The system allows a user of the article to take an element of the fastening system 46, and connect the first waist region 30 to the segment 32 in at least two places. This could be achieved by manipulating the f elements of the clamping device.

According to some modalities, the diaper 0 could be subject to restraint that could be closed again, or alternatively, could be of a diaper type brief. When the absorbent article is a fastening system that could be closed again attached to the diaper to a user. When the absorbent article is a cloth, it could comprise at least two side panels attached to the fabric forming a brief. The fastening system and any component of these to form the composite structure of the diaper. While the lower canvas 20, and the absorbent core 14 can be assembled in well-known configurations, the diaper configurations illustratively in US Pat. UU no. 5,554,145 entitled "Ab h Multiple Zone Structural Elastic-Like Web Film Extensible assigned to Roe et al., September 10, 1996, patent of 69,234 entitled" Disposable Pull-On Pant "granted to Buell et al. nineteen ninety six; and the US patent. UU no. 6,004,306 entitled "Absorb lti-Directional Extensible Side Panels" granted to Robles et al. 2 999.

The upper canvas 18 of Figure 1 could be partial or stitched or it could be shortened to provide a hollow space 18 and the absorbent core 14. Illustrative structures that are elastized or shortened are described in greater detail in Pat. no. 5,037,416 entitled "Disposable Absorbent Article Having Elasti psheet" (Disposable absorbent article with an extensional top sheet) issued to Alien et al. on August 6, 1991; and patents like sheets and underwear. In some embodiments, the canvas is substantially impervious to liquids (eg, urine) and comprises a non-woven fabric and a thin plastic film, such as a thermal film of approximately 0.012 mm (0.5 mil) to approximately 0.051 films of the Suitable underpants include those manufactured by Tredeg Terre Haute, Ind., And sold under the trade names X15306, X1, suitable bottom canvas materials may include materials that allow vapors to escape from the diaper 10 while continuing to avoid in through the bottom sheet 10. Permeable illustrative materials such as woven wefts, non-woven wefts, non-woven composite materials coated with film, and microporous films such as Mitsui Toatsu Co., of Japan with the designation ESPOIR NO and by EXXO Bay City, Tex., With the designation EXXAIRE. Composite materials that comprise polymer blends are available from ??? Cinnati, Ohio with the name of HYTREL mix P18-3097. Such meable matters are described in greater detail in PCT application no. WO 95/2 June 1995 in the name of E.l. DuPont. Other canvases lower than approximately 10000 g / 24 h / m2, greater than ap 00 g / 24 h / m2, greater than approximately 12,000 g / 24 h / m2 approximately 15000 g / 24 h / m2, measured in accordance with WSP 70.5 (% relative humidity.

Figure 2 shows a cross-section of the Figure or section line 2-2 of Figure 1. Starting from year 56, the diaper 10 may comprise the upper canvas 18, the absorbent cores 14 and the lower canvas 20. As shown in Figs. 10, it can include at least one compressed strip 15 aligned with which together they can cooperate to facilitate the formation of an 0-year shape. The concave shape is also known as "concave shape by preform". since the concave shape is formed in diaper 1 year 10 is used by a user. The concave shape 58 may have the oriented depressionGenerally, in the crotch region 3 certain modalities a diaper with a concave shape preformed p ply the volume of the concavity above the diapers c aspect can be attributed to the concave shape 58 which can, generates and inclines slightly inwards .

According to a certain embodiment, the diaper 10 has a pick-up system 50 disposed between the upper canvas 18 and one side of the absorbent core 14 oriented to the user. The system shown in FIG. 1 may include a lower uptake layer 52, lower portion 54. The uptake system 5Q may, for example, chemically cross-linked cells. Said cellulosic fibers crosslinked desirable absorbency properties .. Chemically active cellulosic fibers are described in U.S. Pat. no. 5,137.53 ali the chemically crosslinked cellulosic fibers are about 0.5 mole% to about 10.0 mole percent polycarboxylic C2 to C9 or about 1. about 6.0 mole% of a polycarboxylate crosslinking agent in a glucose unit. Citric acid is a reticulating agent. Other modalities could be polyacrylic acids. Furthermore, according to accretions, the crosslinked cellulosic fibers have a retention index of about 25 to about 60, of about 28 to collection agent 50 may comprise a combination of fabrics, not a non-woven fabric without the crosslinked cellulosic fibers and at least u chemically cross-linked cellulose fibers. Moreover, of conformity, the collection system 50 may comprise the cellulose fibers blended with other fibers such as natural polymer fibers with other modalities other natural polymer fibers or with fibers of high surface area, thermoplastic fibers , polypropylene fibers, PET fibers, rayon fibers, lyocell fibers, and mixtures of In accordance with a certain modality, the system has a high capacity for collecting fluids. L do is measured in grams of fluid absorbed per gram of material to resa by the value of "maximum uptake". Therefore, a captive corresponds to a high capacity of the material and is beneficial to ensure the complete uptake of fluids to be absorbed by tation.

A relevant attribute of the catchment system 50 is median orientation, MDP, for its acronym in English. The MDP is a thermally welded medid. In some embodiments, they may be permanently hydrophilic and, in particular, non-woven fabrics with durable rhophils. Another suitable embodiment comprises a structure of modalities; the non-woven fabrics are porous.

In some embodiments the non-woven fabric materials would include, but are not limited to, synthetic fibers, such as PE, P, the polymers used to make non-woven fabrics could be rheophobic, such polymers could be coated with coating to produce nonwoven fabrics with hydrophilic coatings through the application of a hydrophilic monomer and a polymeric initiator in the non-woven fabric, and conducting an activated polymerization that results in the monomer bonding chemically to the surface as described in publication of the patent application cop. UU no. 2005/0159720. Another way to produce durable hydrophilic fabrics is to coat the non-woven fabric with rhophiles as described in the co-pending patent application of 12,621 issued to Rohrbaugh et al. and in the publication of the application can be organic or inorganic, synthetic or inorganic non-organic, there are generally, as oxides, silicates, typical examples of suitable nanoparticles are the miner ratified (eg, LAPONITE ™ of Southern Clay Products, Inc (US Disability (eg, Disperal P2 ™ from North American Sasol, Inc.) Accidentally, a nonwoven fabric coated with suitable nanoparticles and co-pending patent application serial No. 10 / 758.066 with the title orbent. article comprising a durable hydrophilic core wrap "by Ekateri nomarenko and Mattias NMN Schmidt.

In addition, useful non-woven fabrics are disclosed in the patent m. 6,645,569 issued to Cramer et al. US patent UU n rgada to Cramer et al. US patent UU no. 7, 1 12,621 awarded. and co-pending patent applications nos. 10 / 338,603 and 10/338 ramer et al.

In some cases, the surface of non-woven fabric will be surface shrinkage hiperenergético (corona, plasma) before the next, are effective.

In some embodiments, the absorbent core 14 may also absorb any material that is generally compressible, irritates the wearer's skin, and is capable of absorbing and retaining liquids such as body exudates. In such embodiments the core absorbs a wide variety of liquid absorbent materials which are used in disposable diapers and other absorbent articles, such as crushed fabrics, which are generally known as air felt, guyed, blown-melted polymers, including coform, chemically crosslinked or chemically crosslinked fibers, woven fabric, including tissue paper, absorbent foams, absorbent sponges or any known orbiting or combinations of materials. The core will absorb, additionally, minor amounts (generally approximately 10%) of materials, such as adhesives, waxes, oils Illustrative absorbent structures for use in orbits are described in U.S. Pat. UU no. 4.610.6); US patent UU no. 4,834,735 (Alemany et al.); patent 132 for forming a first absorbent layer 60 of the core to second printing unit 134 to form a second absorbent layer 14.

The first printing unit 132 can comprise auxiliary adhesive 136 for applying an auxiliary adhesive to may be a non-woven fabric web, a first support roller for the substrate 64, a hopper 142 for holding the polymeric material 66, a printing roller 144 for transferring the absorbent matte 66 to the substrate 64, and a material material applicator 146 for applying an adhesive thermoplastic material 68 to the absorbent particulate polymeric material 66 thereon.

The second printing unit 134 can comprise auxiliary adhesive 148 for applying an auxiliary adhesive to the second rotating support roller 52 to receive the second substrate 7 to 154 for containing the absorbent particulate polymer material 74, an impression 156 for transferring the material The polymeric particulate absorbs 54 to the second substrate 72 and a second applicator of adhesive thermoplastic material.

In FIG. 7 portions of the first support hopper 140 and the first printing roller 144. are illustrated. As illustrated, the first rotary support roller 140, having the same rotating support roller 152, comprises a rotary drum 1 peripheral aerated support 166 for receiving the first substrate 64.

As also illustrated in Figure 8, the first roller of e has the same structure as the second printing roller 156, rotary ibor 168 and a plurality of receptacles of sorbent polymer material 170 on a peripheral surface 172 of drum 168. e are better illustrated in Figure 9 can have various forms, particular dality, are conical. The receptacles 170 could convey air 174 into the drum 168 and comprise an aerated adhesive polymeric particle cover 176 in the receptacle and prevent adhesive particulate glyph 66 from falling or being drawn into the interior 174.

A second grip line 163 between the first and second compression in the absorbent core 14.

During operation, the printing system 130 receives a substrate 64 and 72 in the first and second printing units; The first substrate 64 is entrained by the first rod 140 beyond the first auxiliary adhesive applicator 136 which auxiliaryly assists the first substrate 64 in a pattern as described previously (not illustrated) within the first support roller 140. first the vertical support grid 166 and maintain the first substrate 64 support cell 140. This results in an irregular surface on the gravity side or the use of the vacuum means, the substrate 64 follow the irregular surface, and thereby, the substrate 64 will adopt a form. The absorbent particulate polymeric material 66 may accumulate on the substrate 64. Then the first support roller 1 st substrate 64 through the first rotary printing roller 144 q absorbent polymeric particulate 66 from the first hopper 142 64 in a pattern of grid 92. A vacuum (not illustrated) in the prion 144 can keep the particulate polymer material absorbing orbent 66 on the first substrate 64.

Accordingly, the irregular surface of the carrier support support grids 140 and 152 determines the distribution of the orbiting polymeric material 66 and 74 throughout the absorbent core 14, and in a similar manner to the joining areas.

Meanwhile, the second rotary support roll 72 through the second auxiliary adhesive applicator 148 auxiliary to the second substrate 72 in any predefined pattern rotatable support roller 152 transports to the second substrate a printing roller 156 which transfers the material orbient polymer 74 from the second hopper 154 to the second absorbent particulate polymeric substrate 7 7 in a grid pattern 72 in the same manner as described above with printing unit 132. Then the second material applicator 158 applies the adhesive thermoplastic adhesive material 76 for absorbing particulate 74 on the second substrate 72. Next, printed substrates 64 and 72 pass through the agar line over, or in any other manner, in combination with the absorptive particulate polymeric substrate. and 74, and the thermoplastic material and 76. In another embodiment, the outer cover 16 and the The substrate should be provided from a unitary sheet of material.

As shown in Figure 11, after the formed number is combined with the outer cover 16, 200 may be fed into a folding process or device 202, wherein the cloth is folded and compressed. In a certain embodiment, the unfinished diaper 2 is prime along a longitudinal axis 204, similar to 36 in Figure 1, a fold 206 can be formed in the diaper 208. In other mined modality 200 it can be folded and compressed throughout from one or more line alleles to the longitudinal axis 204, where a corresponding number of marse in the diaper. When deployed, the diaper 208 may include a preformed V, similar to 58 shown in Figure 2, within the diaper region 208.

For certain embodiments when the absorbently non-compressible core, such as a free air filter core, is consistent with the present disclosure.

The dimensions and values set forth herein are interpreted as strictly limited to the numerical values. On the other hand, unless it is specified for any other purpose, it is intended to refer to both the expressed value and the equivalent value approximately equivalent to that value. For example, it says "40? T ?? tG" means "approximately 40 mm." All documents cited in the Detailed Description incorporate, in the relevant part, as reference herein, any document should not be construed as an admission of previous use in connection with the present invention. In the standard measure or definition of a term in this document, it contradicts any definition of the same term in a document incorporated with the meaning or definition assigned to that term in this document.

Although particular modalities have been illustrated and described, it will be evident to those experienced in the industry that changes and modifications are made without deviating from the spirit and

Claims (1)

1. CLAIMS 1 . A disposable absorbent article (10) comprising a structure (12) including an upper canvas (18) and u), the structure (12) has end edges (44) and longitudinal edges an absorbent core (14) comprising a knitted mat absorbent (66/74), the absorbent core (14) is located upper (18) and the lower canvas (20), and characterized in that the core a lights at least one strip (15) that extends through crotch (34) of article (10); Y at least one longitudinally oriented fold (49) that portion of the crotch region (34), characterized in that it is fired (58) within the article (10), preferably at least one primed strip (15), preferably the Absorbent article is a diaper and the for operable to receive a portion of the user's body. 2. The disposable absorbent article (10) of confo indication 1, further characterized in that the absorbent core (1) (34). 5. The disposable absorbent article (10) according to the preceding claims, further characterized in that it comprises a plurality of practically paralimitudinally oriented strips (36) associated with the article (10). 6. The disposable absorbent article (10) of any of the preceding claims, further characterized by a strip (15) comprising at least one of the following: a tangular, or a strip of polygonal shape. 7. The disposable absorbent article (10) of any of the preceding claims, further characterized in that a longitudinally oriented fold (49) comprises a longitudinally oriented gudgeon. 8. The disposable absorbent article (10) according to the preceding claims, further characterized in that by longitudinally means (49) it comprises an adhesive. 9. The disposable disposable absorbent article (10) inwardly.