CN1371671A - Absorption pad for incontinence - Google Patents

Abstract

An incontinence absorbent pad provided with a liquid-impermeable but breathable backing sheet and an absorbent unit partially covered by the backing sheet, wherein the absorbent unit includes a non-woven fabric substrate, an absorbent region and a breathable region , the absorbent area is composed of a plurality of high-absorbent layers extending in strips on the surface of the non-woven fabric substrate, and there is no high-absorbent layer on the air-permeable area. This incontinence absorbent pad is sufficient to meet the needs of incontinence patients and can provide a comfortable feeling during use.

Description

incontinence absorbent pads

The present invention relates to thin and compact incontinence absorbent pads, and more particularly, to incontinence absorbent pads that need to be applied to the crotch of a user to address his or her minor incontinence episodes. As used herein, the term "incontinence absorbent pad" generally refers to absorbent articles for use by incontinent persons, including all articles known as absorbent sheets, absorbent pads or absorbent cards. For brevity, the term "minor incontinence" as used herein refers to situations in which urine output is 250 cc or less in terms of urine output, as opposed to the term "severe incontinence" which refers to situations in which greater urine output is produced.

In recent years, hygienic products specially designed for mild incontinence of adults have attracted more and more attention in the market, and many manufacturers are actively committed to the development of such products. Symptoms of mild incontinence are more common in women, can range from mild (15cc or less) to moderately mild (approximately 200cc), and afflict the age group 20 to 50. To date, relatively few products have been specifically designed to address mild incontinence symptoms in adults, with other products such as sanitary napkins and panty shields used as substitutes.

Products such as sanitary napkins and panties, which were originally designed to manage menstrual blood, have encountered many problems when used to address urinary incontinence. It has been found that current products made from wood pulp and designed to address minor urinary incontinence also cause problems.

One of the problems is that the products currently used to treat light incontinence have problems with leakage and discomfort, often resulting in a sticky feeling, because they do not provide adequate absorption and performance. One reason for these and other problems is that a very important feature in baby diapers and adult incontinence diapers is the ability to rapidly absorb large quantities of expelled fluid that are expelled at once. This is known as the "collection" effect. Conversely, articles designed for minor incontinence conditions must be able to efficiently and effectively handle usually small, but frequent discharges. Adult light incontinence products designed as baby diapers and adult incontinence diapers often use wood pulp fluff as their primary ingredient. When used to address minor incontinence in adults, the surface of the wood pulp fluff remains wet, causing rashes or irritation of the wearer's skin that comes into contact with the absorbent article.

In order to solve these problems, it is desirable to design an adult light incontinence article that utilizes the properties of superabsorbent polymers (SAPs), which have excellent properties in gelling liquid exudates. Also preferably, such absorbent articles have a relatively high content of SAP, most preferably nearly 100% SAP.

A second problem with current absorbent articles is that the absorbent article is always wet during use. To combat this, the key is to have a structure that is breathable so that it remains breathable during use and does not become uncomfortable and stuffy. In order to achieve such a structure, not only members such as the top sheet (top sheet) and the back sheet must be breathable, but also the absorbent article itself must have a breathable structure.

A third problem that adult mild incontinence products must solve is that people suffering from mild incontinence symptoms usually have irregular, transient episodes that keep the patient in a state of high tension all the time. For example, minor incontinence often develops from changes in abdominal pressure that occur during normal pregnancy, or from sneezing, sudden laughter, or body movements such as jumping. In other words, symptoms of incontinence often occur in women who are living normally and healthy lives. It is therefore very important that incontinence articles can be worn as inconspicuously as possible and be of a very thin and compact form so that additional or unused articles can be carried in a handbag or pocket.

A fourth problem that incontinence products must address is that users come in a variety of shapes and sizes. An absorbent article must have three-dimensional (stereoscopic) adaptability to the various shapes of the wearer's anatomical regions.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an absorbent pad for incontinence that satisfies the various requirements described above.

According to one aspect of the present invention, there is provided an incontinence absorbent pad comprising:

An absorbent unit comprising a non-woven fabric base sheet, an absorbent area and a breathable area, the absorbent area being composed of a plurality of high-absorbent layer members extending strip-like on the surface of the non-woven fabric base sheet, the breathable region is formed adjacent to the nonwoven fabric substrate in a region devoid of the superabsorbent layer;

a backing sheet covering the absorbent unit, leaving a portion of the surface of the absorbent unit uncovered; and

An acquisition layer disposed on the surface of the absorbent unit, the acquisition layer covering at least a portion of the uncovered surface.

Furthermore, the absorption unit can be covered by a dispersion layer. In this case it is preferred that an acquisition layer is arranged on the distribution layer and covers at least a part of the uncovered surface of the absorbent element.

According to another aspect of the present invention, there is provided an absorbent pad for incontinence comprising a topsheet made of a liquid-permeable and breathable sheet, a liquid-impermeable but breathable backsheet, and a The absorption unit between the sheet and the upper sheet is composed. In this case, the absorbent unit comprises a nonwoven fabric substrate, an absorbent region and an absorbent sheet, said absorbent region being formed of a plurality of high-absorbency layers extending in strips on the surface of the nonwoven fabric substrate, so that The absorbent sheet has a breathable area without the superabsorbent layer.

The back sheet and the top sheet may be bonded to each other along their peripheral portions, thereby forming a space between the two sheets, in which the absorbent unit may be located.

The absorbent unit may be constituted by a first absorbent sheet and a second absorbent sheet stacked on top of each other. With this structure, the first absorbent sheet may consist of a high-absorbent layer in several absorbent regions. The second absorbent sheet may be configured to have one or more superabsorbent layers at positions corresponding to one or all of the absorbent regions of the first absorbent layer.

In one embodiment, the absorbent unit has two absorbent regions. The first absorbent area may be located in the middle of the first absorbent sheet, and the second absorbent area may be located in the lateral outer area of the first absorbent sheet. Under this configuration, preferably, the ratio of the width (Aw) of the first absorbent region to the width (Bw) of the second absorbent region is in the range of 1:0.3-2.

Preferably, the superabsorbent layer consists essentially of superabsorbent polymers. Also preferably, the superabsorbent layer can be divided into multiple sections or strips.

Additionally, the nonwoven fabric substrate of the absorbent sheet may be bonded to other components of the incontinence absorbent pad in the breathable region. For example, the nonwoven fabric substrate may be bonded to the topsheet, backsheet, diffuser sheet, or other layer of the absorbent sheet. Such bonding can be accomplished by any number of suitable means, such as adhesive bonding, heat sealing bonding, and the like.

In addition, the topsheet, backsheet, absorbent unit and their constituent members may be made of degradable materials.

An advantage of an incontinence absorbent pad made in accordance with the present invention is that it provides excellent breathability through the absorbent pad and provides high absorbency. Such an absorbent pad is very comfortable to use and protects the user from an increase in humidity and body temperature when worn.

Another advantage of incontinent absorbent pads made in accordance with the present invention is that components such as the topsheet, backsheet and absorbent unit can be made of degradable materials. Such absorbent pads can be flushed with water in the toilet without clogging the pipes. Such absorbent pads, when disposed of, biodegrade or otherwise degrade without causing harm to the environment.

1 is a plan view of an incontinent absorbent pad according to a first embodiment of the present invention;

Fig. 2 is a cross-sectional view taken along the line A-A in Fig. 1;

Figure 3 is a plan view of an embodiment of an absorbent unit in the incontinent absorbent pad shown in Figure 1;

4 is a cross-sectional view of an incontinence absorbent pad according to a second embodiment of the present invention;

Figure 5 is a cross-sectional view of an embodiment of an absorbent unit for use in the incontinent absorbent pad shown in Figure 4;

6 is a cross-sectional view of an incontinence absorbent pad according to a third embodiment of the present invention;

7 is a cross-sectional view of an incontinence absorbent pad according to a fourth embodiment of the present invention;

8 is a cross-sectional view of an incontinence absorbent pad according to a fifth embodiment of the present invention;

Fig. 9 is a longitudinal sectional view showing the structure of an absorbent unit embodiment applicable to the present invention;

Fig. 10 is a longitudinal sectional view showing the structure of another absorbent unit embodiment applicable to the present invention;

Fig. 11A is a longitudinal sectional view showing the structure of another absorbent unit embodiment applicable to the present invention;

Fig. 11B is a longitudinal sectional view showing the structure of yet another absorbent unit embodiment applicable to the present invention; and

Fig. 12 is a longitudinal sectional view showing the structure of still another embodiment of an absorbent unit applicable to the present invention.

Several embodiments of the present invention will be described below in conjunction with the accompanying drawings.

Figure 1 shows an embodiment of an incontinence absorbent pad designed for small amounts of urine according to the invention. In Fig. 1, reference numeral 1 denotes a top sheet, and reference numeral 2 denotes a back sheet. The topsheet 1 is made of a sheet of material such as a perforated nonwoven fabric or perforated film which is liquid-permeable and air-permeable. The backing sheet 2 is preferably made of a porous film that allows air and moisture to pass through but cannot allow moisture to pass through, or is formed by bonding one or more such films with one or more layers of non-woven fabric Laminates. Alternatively, the backing sheet 2 may consist of a waterproof laminate made of a nonwoven fabric of polyethylene or polypropylene, such as spunbond-meltblown-spunbond (S.M.S.) or spunbond-meltblown - Melt blown - spun bonded (S.M.M.S.) fabrics. In such a configuration, the use of a membrane as previously described may not be necessary.

The periphery 3 of the top sheet 1 and the back sheet 2 is formed by suitable means such as heat sealing or ultrasonic sealing. In addition, an absorbent unit 4 is interposed between the top sheet 1 and the back sheet 2 . In one embodiment of the present invention, concave lines may be provided in the main absorption area in the middle of the upper sheet 2 to enhance its three-dimensional structure.

Referring now to Figures 2 and 3, in one embodiment of the present invention, the absorbent unit may comprise a substantially rectangular nonwoven fabric substrate 5, which in this embodiment faces the backing sheet 2, and Adjacent to a high-absorption zone formed by a plurality (four are shown) of strips of the high-absorption layer 6 . Between the superabsorbent layer strips 6 there are gaps which expose the nonwoven fabric substrate 5 . In this embodiment, the absorbent unit 4 has an absorbent area consisting of a superabsorbent layer 6 and a region not containing the superabsorbent layer, which separates the superabsorbent layer 6 and forms an area that allows air to flow into the nonwoven fabric base. Breathable area of sheet 5.

The superabsorbent layer 6 is preferably mainly made of superabsorbent polymer (SAP). In order to obtain the best possible compactness and absorbency, it should contain as much SAP as possible, ideally 60% or more. As described in JPA H10-168230, such a superabsorbent layer 6 can be produced on a commercial scale, that is, using a device known as a wire coater to apply a dispersion of particulate superabsorbent polymer A dispersion liquid is applied to the surface of a nonwoven fabric.

In a preferred embodiment of the present invention, a diffusion sheet 7 is sandwiched between the absorption unit 4 and the top sheet 1 . The diffuser sheet 7 consists of a liquid-permeable non-woven fabric, the size of which is approximately equal to that of the absorbent unit 4 . The diffusion sheet 7 can retain the liquid coming through the upper sheet 1, and make these liquids disperse in all directions. The diffuser sheet 7 (also referred to as the acquisition layer) can be larger or smaller than the absorbent unit 4 and is preferably more concentrated in the central region. Similarly, a piece of tissue 8 may be interposed between the absorbent unit 4 and the backing sheet 2 in a preferred embodiment. The tissue 8 improves the dispersion of liquids and increases the dimensional stability of the incontinence absorbent pad. Alternatively, when the incontinence absorbent pad is used to collect very small amounts of urine, the diffuser sheet 7 and tissue 8 can be omitted to make the overall structure simpler.

Although in the foregoing embodiments, the diffusing sheet 7 is located between the absorbent unit 4 and the topsheet 1 , this configuration can also be reversed so that the topsheet is located between the collecting sheet 7 and the absorbent unit 4 . Alternatively, as shown in Figures 7 and 8, the topsheet 7 may be omitted and an acquisition layer 7' may be used instead. The advantage of this embodiment is that the absorbent unit can expand without its upper part being restricted by the topsheet 1 . The acquisition layer used for this purpose is preferably a bulky sheet material having a weight of about 30 g/ ^m2 , or a compressed piece of such material. For example, a bulky perforated film having an indent line thickness of 1184 [mu] (such as manufactured and sold by Tredegar Corporation under the trade designation "X-27373") may be used. Compressed sheets made of cellulose sponge with a density of about 100 g/m ² and bulky nonwovens made of hollow bicomponent fibers with a density of 50 g/m ² can also be used.

In the present invention, the superabsorbent layer strip 6 is a layer also of superabsorbent polymer (SAP). Superabsorbent polymers are polymers that can absorb a large amount of water per unit weight, generally including carboxymethylcellulose, acrylic acid and its salts, cross-linked acrylate polymers, starch-acrylic acid graft copolymers, starch- Hydrolysates of acrylonitrile graft copolymers, cross-linked polyoxyethylene, cross-linked carboxymethylcellulose, partially cross-linked water-swellable copolymers such as polyethylene oxide and polyacrylamide, and isobutylene maleic acid copolymer. By drying such a copolymer, a microparticle-based copolymer can be obtained. After drying, post-treatment is usually carried out to increase the cross-linking density of the copolymer particles, and at the same time, an antiblocking agent is added to prevent product particles from sticking due to moisture absorption.

The incontinence absorbent pad constructed according to the present invention can effectively absorb repeatedly discharged, small amounts of liquid by virtue of the high absorbency of the superabsorbent polymer contained in the superabsorbent layer 6 of the absorbent unit 4, while keeping the topsheet 1 surface remains dry. Also, since the absorbent unit 4 has breathable regions located between the superabsorbent layers 6, exposing the nonwoven substrate 5 to air flow, it further helps to keep the surface of the topsheet 1 in a dry state. Also, the breathable regions can facilitate bending and uniform deformation, thereby allowing the absorbent article to three-dimensionally deform to match the contours of the wearer's body. In addition, the breathable areas can also act as fluid channels to efficiently and quickly convey expelled liquids to the surface of the superabsorbent layer 6 .

Since light incontinence absorbent pads made according to the present invention can be disposed of by flushing them in the toilet or discarding them in the trash, it is preferable to use a biodegradable SAP material in the product. Examples of biodegradable materials well known in the art are cross-linked polyolefins, cross-linked carboxymethyl cellulose (as described in U.S. Patent 4,650,716 to Gelman), cross-linked alginic acid, cross-linked starch, and cross-linked of polyamino acids. By using a combination of superabsorbent polymers and microfibrillated-fibril-formed cellulose for the superabsorbent layer 6, a structure with a higher absorbency can be obtained.

In the present invention, an important component of the absorbent unit 4 is the nonwoven fabric substrate 5 . The nonwoven fabric substrate may be constructed of materials collectively referred to as "nonwovens", such as wet-laid and dry-laid spunbond nonwovens and spunlace nonwovens. Preferably, the volume of the nonwoven fabric used in the present invention is as large as possible, such as using a spunlace nonwoven fabric obtained by entangling a carded fiber web in a water stream, and by making a carded fiber web entangled in water. A thermally bonded nonwoven fabric obtained by thermally bonding comb fiber webs. Also, in order to provide a degradable absorbent unit, in combination with the above-mentioned biodegradable SAP, it is preferable to select a biodegradable cellulose non-woven fabric or be able to contain CMC (carboxymethyl cellulose) The cellulose nonwoven fabric decomposed in the water of the calcium salt is used to make the nonwoven fabric base sheet 5.

It should be understood that the term "degradable absorbent unit" here means not only a degradable absorbent unit, but also includes decomposed in water, biodegradable, decomposed in fertilizer or decomposed in soil the absorption unit. It should be understood that although a degradable absorbent unit 4 has been described above, the incontinence absorbent pad itself as a whole may be degradable by appropriate choice of materials for the topsheet and backsheet. For example, an absorbent unit made of a hydrolyzable material, a topsheet made of a non-fabricated fabric that disintegrates in water, and a material such as partially cross-linked P.V.A. (polyvinyl alcohol) can be used. The synthetic backing sheet is used to construct a fully hydrolyzable incontinence absorbent pad. Such a hydrolyzable absorbent pad can be disposed of by flushing it with water in the toilet.

Some terms used in the present invention are defined below.

The term "water-decomposable or hydrolyzable" means a constituent material that can be easily decomposed in the water of a flush toilet and can be dispersed with sufficient fineness without causing clogging of pipes or the like .

The term "biodegradable" means a constituent material that can be decomposed into Safe, low molecular weight material.

The term "degradable in fertilizer" means a constituent material that can be decomposed into safe, low-molecular-weight materials by the action of living organisms (eg, microorganisms, fungi, enzymes) in the fertilizer. For example, when 1 part by weight (in dry state) of degradable absorption unit is made into 100 parts by weight (in wet state) of fertilizer inoculum and treated at 58 degrees Celsius for 40 days, the degradable The weight of the absorbent unit may be reduced from 0% to 50% of its original dry weight.

The term "degradable in soil" means a constituent material that can be decomposed into safe, low-molecular-weight materials by the action of microorganisms, fungi or enzymes in the soil when buried in the soil. For example, when 1 part weight (in a dry state) of a degradable absorbent unit is buried 300 cm below the ground of a farmland and kept for six months, the weight of the degradable absorbent unit after this treatment can be reduced to 1/2 of its original dry weight. 0% to 50%.

It should be understood that all terms mentioned above are interchangeable for purposes of the present invention. Furthermore, as mentioned earlier, all of these terms should be covered by the one general term "degradable".

A regular type incontinence absorbent pad according to a second embodiment of the present invention will be described below with reference to FIG. 4 . In this embodiment, a diffuser sheet 7 is interposed in the space between the top sheet 1 and the back sheet 2 . Similarly, in the space between the absorbent unit 4 and the backing sheet 2, a thin fabric 8 is provided. The absorbent sheet 7 and tissue 8 are positioned to enhance the dispersion of liquids and the overall dimensional stability of the incontinence absorbent pad. The structure is similar to that of the first embodiment shown in FIGS. 1 to 3, but differs in several respects. One of the differences is that an edge member 10 is bonded to the outer periphery 3 of the backing sheet 2, and an elastic member 11 is connected to the inner periphery of the edge member 10 so as to make the edge member 10 extend inward.

FIG. 5 shows the absorption unit 4 in FIG. 4 . The absorbent unit 4 has a substantially rectangular nonwoven fabric substrate 5 . The first absorbent region A is adjacent to the middle region of the nonwoven fabric substrate 5 . The first absorbent area A is composed of three parallel strips 6 of superabsorbent layer separated by narrow air-permeable areas C1. A pair of second absorption regions B composed of high absorption layers 6 are located on both sides of the first absorption region A, and the high absorption layers 6 are parallel to the absorption layers in the first absorption region A. The second absorbent zone B is spaced apart from the first absorbent zone A by the wider air permeable zone C2.

The ratio of the width Aw of the first absorbent region A to the width Bw of the second absorbent region B is preferably in the range of 1:0.3-2, more preferably in the range of 1:0.7-1.0. Also, preferably, the air permeable region C2 separating the first and second absorbent regions A and B occupies 10% or more, preferably 15%-50%, of the total area of the absorbent unit.

Since the first absorbent area A is arranged in the middle, and the second absorbent area B is arranged on both sides of the first absorbent area A, it is more convenient to obtain different absorption characteristics in each area, and it is more convenient to tailor and produce different characteristics, Products that can meet different needs. At the same time, this embodiment also provides a structure whose form can be easily changed.

In addition, when the incontinence absorbent pad becomes wetted by incontinent urine, the breathable regions C1 and C2 allow the incontinence absorbent pad to be extremely breathable, preventing the absorbent pad from becoming hot, stagnant, or otherwise An uncomfortable situation.

Referring now to Figure 4, a heat seal 9 connects the absorbent unit 4 to other components such as the diffuser sheet 7, scrim 8, topsheet 1 and backsheet 2, and makes all of these components integral. The thus integrated absorbent unit 4 is fixed in place, and the absorbent unit 4 and the incontinent absorbent pad retain their original shape. Also, the heat seal 9 can provide a channel for liquid to flow upwards and downwards, and in particular can act as a short channel for liquid to flow from the top sheet downwards towards the tissue layer 8 .

Figure 6 shows a third embodiment of the present invention wherein an incontinent absorbent pad designed in accordance with the present invention can absorb more liquid over a longer period of time. In this embodiment, there are two absorption units 4a and 4b (ie dual structure absorption units), each having a structure similar to the embodiment shown in FIG. 4 . The other components shown in Fig. 6 are similar to those of the incontinence absorbent pad shown in Fig. 4, and are denoted by the same reference numerals, and thus will not be described again.

The embodiment shown in Figure 6 has a high absorbency while maintaining good breathability. In this embodiment, the diffusing sheet 7 is located between the top sheet 1 and the upper nonwoven fabric base sheet 5 , but it is also possible that the top sheet 1 is located between the nonwoven fabric base sheet 5 and the diffusing sheet 7 .

In another embodiment of the present invention, as shown in Figure 7, two absorbent sheets 4a and 4b are connected together by means of heat seals 9 at two points, and are bonded by a backing sheet 2 in such a way Wrapped, ie, the upper surface of the uppermost absorbent sheet 4a is uncovered, the backing sheet 2 has elastic bands 12 and 13 along its periphery. An acquisition layer 7' is disposed on the uppermost absorbent sheet 4a, which covers part or all of the surface not covered by the backing sheet 2.

The embodiment shown in FIG. 7 can be varied as shown in FIG. 8 . In FIG. 8, the pair of absorbent sheets 4a and 4b are completely enclosed by a diffusing sheet 14. In FIG. As in the previous embodiment, a backing sheet 2 having elastic bands 12 and 13 on its outer periphery surrounds the absorbent sheets 4a and 4b and the diffusing sheet 14, leaving only a portion of the diffusing sheet 14 uncovered. A collection layer 7' covers part or all of the exposed portion of the diffusion sheet 14.

In the embodiment shown in Figures 7 and 8, the top sheet is omitted, and only an acquisition layer 7' adjoins the uppermost absorbent unit 4a either directly or through a diffuser sheet 14. An advantage of this arrangement is that one or both absorbent units can expand or expand unconstrained by the topsheet on their upper surface. In both embodiments, it is preferred that the acquisition layer is made of a bulky sheet having a density of 30 g/ ^m2 or higher, or a compressed sheet of such a material. Examples of these materials include bulky perforated films with an indentation line thickness of 1184 μ (such as manufactured and sold by Tredegar under the trade designation "X-27373"), or cellulose ^sponge with a density of approximately 100 g/m A compressed sheet made of , or a bulky nonwoven fabric made of hollow bicomponent fibers with a density of 50g/m ² .

Figure 9 illustrates an incontinent absorbent pad according to another embodiment of the present invention. The absorbent unit of this embodiment is composed of two substantially rectangular nonwoven fabric substrates 5 (as shown in FIG. 5 ). The uppermost absorbent sheet 4a is constituted by an upper nonwoven fabric substrate 5, to the inside of which a group of four high-absorbency layers 6 is attached, extending parallel and centered to each other on the substrate. In addition, the uppermost absorbent sheet has a pair of outer high-absorbent layers 6, which are respectively located on both sides of the inner absorbent strip group. The lower absorbent sheet 4b is composed of a nonwoven fabric base sheet, and a pair of outer high-absorbent layers are attached to the lower absorbent sheet 4b at positions corresponding to the outer absorbent layer attachment positions of the uppermost absorbent sheet 4a. The absorbent sheets 4a and 4b are connected to each other and possibly to other components of the article by means of heat seals 9 .

In the embodiment of the absorbent unit shown in Fig. 9, the absorbent capacity is much higher on the sides than in the middle. At the position where the heat seal 9 is set, it can be easily bent or deformed. Such an absorbent article can change its shape to suit the shape of the user's body, especially in situations where the user does not wish to leak from the sides.

In another embodiment of the absorbent unit shown in FIG. 10, a first absorbent sheet 4a has a structure similar to that shown in FIG. There is only one high-absorbent layer strip 6 in the middle of the second absorbent sheet 4b. The first and second absorbent sheets 4a and 4b are connected to each other by a heat seal member 9 . In this embodiment, the central portion of the absorbent pad is highly absorbent and has a larger area in the central portion which expands as the absorbent unit absorbs liquid.

In another embodiment of the absorbent unit, as shown in FIG. 11 a , the absorbent unit includes a first absorbent sheet 4 a and a second absorbent sheet 4 b, and their central parts are bonded to each other by a heat-sealing member 9 . As shown in Figure 1 IB, the absorbent element of this embodiment expands on both sides of the centerline after absorbing liquid.

In the embodiment employing a heat seal, it is common practice to have heat-fused fibrous material on the co-existing inner side of the nonwoven fabric substrate 5 . However, in embodiments where there is no hot melt material on the nonwoven fabric substrate 5, an adhesive such as a hot melt adhesive may be used to bond the nonwoven fabric substrate 5.

Fig. 10 shows another embodiment of the absorbent unit, in which the first absorbent sheet 4a and the second absorbent sheet 4b are bonded to each other with a hot-melt adhesive layer 10 interposed therebetween. This bond facilitates the upward and downward flow of liquid.

The dual structure absorbent unit shown in Figures 6-12 can be selected and configured to optimize the absorbency and the shape adaptability of the absorbent pad to meet the needs of various applications and users. While the foregoing description has focused on a dual-structure absorbent unit consisting of two absorbent sheets, it is also possible to have a three-layer structure or even a four-layer structure composed of four absorbent sheets for higher absorbency.

Although the embodiments of the invention discussed above have indicated that the nonwoven absorbent layer is on top and the superabsorbent layer is on the bottom, it should be understood that the relationship between the two can also be reversed, that is, the substrate is below the absorbent strip. . Also, in an embodiment employing a dual-structure absorbent unit, the positional relationship and/or orientation of the two absorbent sheets can be reversed, ie, the high-absorbent layers can be arranged to face each other, as shown in FIG. 12 . Furthermore, although in many of the embodiments discussed above the strip-shaped high-absorbent layers are described as extending parallel to each other along the longitudinal direction of the incontinent absorbent pad, they may also be designed to extend in a direction perpendicular to the longitudinal direction of the incontinent absorbent pad. extend. In an embodiment employing a dual structure absorbent unit, one set of absorbent strips may be parallel to the longitudinal direction of the incontinent absorbent pad and the other absorbent strips may be perpendicular to the longitudinal direction of the incontinent absorbent pad.

Although the above description has focused on the various embodiments of the light incontinence absorbent pad, it should be understood that the application of the present invention is very wide, and can be used from very light incontinence absorbent pads to baby and adult diapers, simply changing the above The dimensions and characteristics of the various embodiments described are sufficient.

Claims (19)

1. An incontinence absorbent pad comprising: An absorbent unit (4) comprising a nonwoven fabric substrate (5), an absorbent region and a breathable region, the absorbent region being formed by a plurality of strips on the surface of the nonwoven fabric substrate (5). Consisting of a superabsorbent layer member (6) extending in a shape, the breathable area is adjacent to the non-woven fabric substrate (5), formed on the area without the superabsorbent layer (6); a backing sheet (2) covering said absorbent unit (4), leaving a part of the surface of the absorbent unit (4) uncovered; and A collection layer (7) arranged on the surface of said absorbent unit (4), the collection layer covering at least a part of said uncovered surface. 2. The incontinence absorbent pad according to claim 1, characterized in that, the absorbent unit (4) is covered by a diffusion layer (14), the collection layer is arranged on the diffusion layer, and covers the At least a part of the uncovered surface of the absorbent unit (4) is absorbed. 3. An absorbent pad for incontinence, consisting of a top sheet (1) made of a liquid-permeable and air-permeable sheet, a liquid-impermeable but air-permeable backing sheet (2) and a The absorbent unit (4) between the sheet (2) and the upper sheet (1) consists of: a non-woven fabric substrate (5), an absorbent area and a breathable area, said absorbent area is formed by a plurality of high-absorbency layers (6) extending in strips on the surface of the non-woven fabric substrate (5), The air permeable area is formed adjacent to the nonwoven fabric substrate (5) in the area without the superabsorbent layer (6). 4. The absorbent pad for incontinence as claimed in claim 3, characterized in that, the peripheral parts of the backing sheet (2) and the upper sheet (1) are bonded to each other, and the absorbent unit (4) is located on the upper sheet ( 1) and the backing sheet (2). 5. Absorbent pad for incontinence according to claim 3 or 4, characterized in that said non-woven fabric base sheet (5) is bonded to said topsheet (1) in the air permeable area. 6. The incontinence absorbent pad according to claim 3 or 4, characterized in that the non-woven fabric base sheet (5) is bonded to the back sheet (2) and top sheet (1) in the breathable area . 7. The incontinent absorbent pad according to any one of claims 1-6, characterized in that the absorbent unit (4) consists of a plurality of absorbent sheets (4a, 4b) stacked on top of each other. 8. The incontinence absorbent pad according to claim 7, characterized in that, the absorbent unit (4) is composed of a first absorbent sheet (4a) and a second absorbent sheet (4b) stacked on top of each other, the second absorbent sheet (4a) An absorbent sheet (4a) has a high-absorbent layer (6) at a position corresponding to the first absorbent area and a second absorbent area, while a second absorbent sheet (4b) has a high-absorbent layer (6) at a position corresponding to only the second absorbent area High absorbency layer (6). 9. The incontinence absorbent pad according to claim 7, characterized in that, the absorbent unit (4) is composed of a first absorbent sheet (4a) and a second absorbent sheet (4b) stacked on top of each other, the second absorbent sheet (4a) An absorbent sheet (4a) has a high-absorbent layer (6) at positions respectively corresponding to the first absorbent area and the second absorbent area, while the second absorbent sheet (4b) only has a A superabsorbent layer (6). 10. The incontinence absorbent pad according to claim 8 or 9, wherein the ratio of the width (Aw) of the first absorbent region to the width (Bw) of the second absorbent region is 1:0.3- 2 range. 11. The incontinent absorbent pad according to any one of claims 1-10, characterized in that the superabsorbent layer (6) consists essentially of superabsorbent polymers. 12. The incontinence absorbent pad according to claim 11, characterized in that the superabsorbent layer (6) contains 60 wt.% or more superabsorbent polymer. 13. The incontinence absorbent pad according to any one of claims 1-12, characterized in that the superabsorbent layer (6) consists of a mixture of superabsorbent polymer and microfibrillated fibrils. 14. The incontinence absorbent pad according to any one of claims 1-13, characterized in that the high absorption layer (6) is divided into a plurality of strips extending parallel to each other. 15. The incontinent absorbent pad according to any one of claims 7-14, characterized in that the absorbent sheets (4a, 4b) are adhered to each other. 16. The incontinence absorbent pad according to any one of claims 7-14, characterized in that, the plurality of absorbent sheets (4a, 4b) stacked on each other form a The absorbent units (4) are completely bonded to each other by the hot-melt resin (9) between them. 17. Absorbent pad for incontinence according to any one of claims 1-16, characterized in that the nonwoven base sheet (5) is bonded to the backing sheet (2) in the breathable area. 18. The incontinent absorbent pad according to any one of claims 1-17, wherein all components of the incontinent absorbent pad are made of biodegradable materials. 19. The incontinent absorbent pad according to any one of claims 1-17, wherein all components of the incontinent absorbent pad are made of a hydrolyzable material.

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