WO2013022055A1

WO2013022055A1 - Body fluid-absorbent article

Info

Publication number: WO2013022055A1
Application number: PCT/JP2012/070302
Authority: WO
Inventors: 信弘多川; 中嶋　海陽; 祐介川上; 翔士 ▲高▼阪
Original assignee: ユニ・チャーム株式会社
Priority date: 2011-08-11
Filing date: 2012-08-09
Publication date: 2013-02-14
Also published as: TW201318612A; TWI528950B; JP2013039163A; JP5871513B2

Abstract

The purpose of the present invention is to provide a body fluid-absorbent article, such as a urine absorbent pad, having an improved function of preventing the side leakage of the body fluid during wearing. In the body fluid-absorbent article according to the present invention, side parts of an upper absorbent part, said upper absorbent part containing absorbent polymer particles, overlap fixation parts of leak-preventing cuffs. Owing to this structure, when the highly absorbent polymer absorbs the body fluid and thus swells and consequently the thickness of the upper absorbent part increases, the leak-preventing cuffs come closer, by the increase in the thickness, to the wearer's skin so as to reduce the gap between the cuffs and the skin. Thus, the side leakage of the body fluid from the gap between the cuffs and the skin can be prevented.

Description

Body fluid absorbent article

The present invention relates to a bodily fluid absorbent article, and more particularly, to a bodily fluid absorbent article suitable for use as a light incontinence pad, panty liner, sanitary napkin, urine absorbing pad and the like.

Conventionally, bodily fluid absorbent articles for use on pants or the like are known. For example, Patent Literature 1 discloses a wearing article in which a first absorbent body and a second absorbent body are interposed between a top sheet and a back sheet. This wearing article is suitable for use as a panty liner, sanitary napkin or the like, and the first absorbent body and the second absorbent body are used in an overlapping state.

JP 2010-110535 A

The wearing article described in Patent Document 1 is worn by placing the back sheet on the inner surface of the pants and bringing the top sheet into close contact with the pants wearer's skin. However, if the top sheet and the skin are separated and a gap is generated between them, the body fluid excreted toward the top sheet flows in the width direction of the worn article, and so-called side leakage is likely to occur.

In the present invention, it is an object to improve a body fluid absorbent article such as a urine absorbing pad so as to prevent side leakage of body fluid when the article is worn.

Therefore, the present invention has a liquid-permeable surface sheet that has a vertical direction, a horizontal direction, and a thickness direction, and forms a skin-side surface, and a liquid-impermeable property that forms a clothing-side surface that is the opposite surface of the skin-side surface. A pair of leak-proof cuffs extending along each of a back sheet, a liquid absorbing structure interposed between the top sheet and the back sheet, and a pair of side edges extending in the longitudinal direction of the liquid absorbing structure It is in improving a bodily fluid absorptive article provided with these.

The features of the present invention are as follows.
The liquid-absorbing structure includes a lower liquid-absorbing part that faces the back sheet and an upper liquid-absorbing part that is above the lower liquid-absorbing part and faces the top sheet.
The lower liquid-absorbing portion includes at least water-absorbing fibers as a liquid-absorbing material, and spreads over the entire area in the vertical direction and the horizontal direction in the liquid-absorbing structure.
The upper liquid-absorbing portion is formed by coating a liquid-absorbing material containing at least superabsorbent polymer particles with a liquid-permeable wrapping sheet, and at least one of the lateral directions in the liquid-absorbing structure. Each side part has a side part formed individually and extending in the longitudinal direction.
Each of the pair of leak-proof cuffs is bonded to the skin-side surface of the top sheet and extends in the longitudinal direction, and extends in a state of being elastically stretched in the longitudinal direction and is contractible. And the cuff part lying down so as to be able to stand up toward the outside in the lateral direction of the body fluid absorbent article, and the fixing part and the cuff part at both ends in the longitudinal direction of the body fluid absorbent article. A pair of end portions in a fixed state.
Each of the pair of leak-proof cuffs also overlaps the side portion in which the fixing portion is individually formed via the top sheet.

In this invention, since the side part of the upper liquid absorption part including the absorbent polymer particles and the fixing part of the leak-proof cuff overlap, the upper liquid absorption occurs as the superabsorbent polymer absorbs the body fluid and swells. When the thickness of the part increases, the leak-proof cuff approaches the skin by the increased thickness, and the gap between the leak-proof cuff and the skin is shortened, so that body fluid leaks from between the leak-proof cuff and the skin. Can be prevented.

The partially broken top view of the urine absorption pad which is an example of a bodily fluid absorbent article. II-II sectional view taken on the line of FIG. The partial view about the urine absorption pad which absorbed urine. The side view of the urine absorption pad by which individual packaging is carried out. The side view of the urine absorption pad in a wearing condition. The figure similar to FIG. 1 about the urine absorption pad which is an example of an embodiment. FIG. 7 is a sectional view taken along line VII-VII in FIG. 6. The figure similar to FIG. 2 which shows the other aspect of a urine absorption pad.

The details of the invention will be described below with reference to the accompanying drawings, taking a urine absorbing pad as an example of the body fluid absorbent article according to the present invention.

1 and 2, X, Y, and Z indicate the transverse direction, the longitudinal direction, and the thickness direction of the urine absorbing pad 1 that are orthogonal to each other, and the line P indicates the dimension of the urine absorbing pad 1 in the lateral direction X. A vertical center line that equally divides is shown, and a line Q shows a horizontal center line that bisects the dimension in the vertical direction Y of the urine absorbing pad 1. The urine absorption pad 1 in FIG. 1 is in a state of being extended in the vertical direction Y, and is disposed such that a portion located on the front side of the wearer is on the upper side in FIG. 1 when worn. The imaginary lines A and B in FIG. 1 indicate the folding curves for the urine absorbing pad 1 when the urine absorbing pad 1 is folded as illustrated in FIG. In the urine absorption pad 1 of FIG. 1, the part above the folding line A is the front end L, the part below the folding line B is the rear end N, and the part between the folding lines A and B Is the intermediate part M.

The urine absorbing pad 1 is formed symmetrically with respect to at least the vertical center line P of the vertical center line P and the horizontal center line Q, and in the thickness direction Z, the skin side surface 1a and the clothing side surface opposite to the skin side surface 1a. 1b. The urine absorbing pad 1 also has a liquid-permeable surface sheet 2 forming a skin side surface 1a, a liquid-impermeable back sheet 3 forming a clothing side surface 1b, and the surface sheet 2 and the back surface. It has a liquid-absorbing structure 10 interposed between the sheet 3 and a pair of leak-proof cuffs 30. An adhesive 72 is applied to the top sheet 3, and the adhesive 72 is covered and protected by a release paper 73.

The top sheet 2 and the back sheet 3 extend from the peripheral part of the liquid-absorbent structure 10 and overlap each other to form a peripheral part 6. The peripheral edge portion 6 includes both edge portions 4 located at both ends in the longitudinal direction Y and both edge portions 5 located on both sides in the lateral direction X.

The liquid-absorbing structure 10 has a first liquid-absorbing layer 21 located on the top sheet 2 side and a second liquid-absorbing layer 41 located on the back sheet 3 side. The first liquid-absorbing layer 21 and the top sheet 2, the second liquid-absorbing layer 41 and the back sheet 3, and the first liquid-absorbing layer 21 and the second liquid-absorbing layer 41 are connected via a hot melt adhesive (not shown). Are joined together.

The first liquid-absorbing layer 21 is liquid-permeable and has an upper absorbent structure in which a liquid-absorbing first core material 22 is interposed between an upper wrapping sheet 23a and a lower wrapping sheet 23b that face each other in the thickness direction Z. A liquid portion 24 and a non-liquid-absorbing portion 25 in which the upper wrapping sheet 23a and the lower wrapping sheet 23b are joined by at least one of adhesion, welding, and mechanical entanglement without interposing the first core material 22; Have The first liquid-absorbing layer 21 in the illustrated example is formed in a rectangular shape that is long in the vertical direction Y, and the upper liquid-absorbing part 24 is formed on a pair of side edges 27 that extend in the vertical direction Y of the first liquid-absorbing layer 21, respectively. It is divided into

side portions

24b, 24c that extend along, and a central portion 24a that extends between the

side portions

24b and 24c and extends along the longitudinal center line P. The first core material 22 is an aggregate of liquid-absorbing materials containing 100 to 50% by weight of superabsorbent polymer particles and 0 to 50% by weight of water-absorbing fibers such as pulverized pulp. In the urine absorption pad 1 in the aspect, it is formed only with superabsorbent polymer particles. The superabsorbent polymer particles are fixed in position by hot melt adhesive (not shown) applied intermittently to the upper wrapping sheet 23a and / or the lower wrapping sheet 23b at the

side portions

24b, 24c and the central portion 24a. It is preferable that The non-liquid-absorbing portion 25 in the illustrated example is formed by joining an upper wrapping sheet and a lower wrapping sheet 23b via a hot melt adhesive (not shown). Of the non-liquid-absorbing part 25, a first region 25a formed at both ends of the first liquid-absorbing layer 21, and each of the

side parts

24b and 24c of the non-liquid-absorbing part 25 and the central part 24a. In the second region 25b formed therebetween, the upper wrapping sheet 23a and the lower wrapping sheet 23b are joined via a hot melt adhesive and embossed to mechanically interlace. In such a first liquid-absorbing layer 21, the upper wrapping sheet 23a and the lower wrapping sheet 23b are bonded to each other around the

side portions

24b, 24c and the central portion 24a via a hot melt adhesive, and both the sheets. By embossing 23a and 23b, the superabsorbent polymer particles forming the first core material 22 are confined in the

side portions

24b and 24c and the central portion 24a.

The second liquid-absorbing layer 41, which is a lower liquid-absorbing part, includes a second core member 42 that is an aggregate of water-absorbing fibers such as pulverized pulp, and a liquid-permeable wrapping sheet 43 that covers the second core member 42. It is formed with. The second liquid absorption layer 41 in the illustrated example has a dumbbell shape in plan view, and the dimension in the vertical direction Y is larger than the dimension in the vertical direction Y of the first liquid absorption layer 21.

The leak-proof cuff 30 is preferably formed of any one of a water-repellent sheet, a liquid-impervious sheet, and a water-repellent and liquid-impervious sheet, and includes a fixing portion 33 and a cuff portion 34. Have. The fixing portion 33 extends in the longitudinal direction Y along the side edge 27 of the first liquid-absorbing layer 21 and is joined to the skin side surface of the topsheet 2 via a hot melt adhesive (not shown). 34 is bent toward the outside in the width direction X at the bent portion 35, and is lying on the fixed portion 33 so as to stand upright. The cuff portion 34 also has a sleeve 34b formed by folding an edge extending in the longitudinal direction Y, and an elastic member 32 is attached to the inside of the sleeve 34b in a state of extending in the longitudinal direction Y. Y is elastically shrinkable. The

end portions

33a and 34a in the vertical direction Y of the fixing portion 33 and the cuff portion 34 are hot melt adhesive (not shown) with respect to the end edge portion 4 in the vertical direction Y of the urine absorbing pad 1 in a state of overlapping each other. The end 30a of the leak-proof cuff 30 is formed.

When the urine absorbing pad 1 is worn and curved in the thickness direction Z, and the elastic member 32 contracts, the lying cuff 34 stands up from the fixed portion 33 as shown by the phantom line in FIG. The vicinity approaches or closely contacts the wearer's skin (not shown) and acts to prevent side leakage of urine in the urine absorbing pad 1.

In each of the leak-proof cuffs 30 that act as described above, the vicinity of the base edge F of the cuff part 34 and the base edge F in the lateral direction X serving as a boundary with the fixing part 33 is the first liquid absorption via the surface sheet 2. It overlaps the

side portion

24b or 24c of the layer 21. The base edge F of the cuff part 34 is located inward in the lateral direction X with respect to the lateral

outer edges

27b and 27c of the

side portions

24b and 24c. In the example of FIG. 2, the cuff portion 34 of the leak-proof cuff 30 is bent at the bent portion 35 parallel to the base edge F, but the cuff portion 34 may be bent at the base edge F. It ’s good.

In the urine absorbing pad 1, the surface sheet 2 can be used by hydrophilizing a non-woven fabric or a liquid permeable open plastic film that is formed of thermoplastic synthetic fibers and has liquid permeability. Examples of the nonwoven fabric include air-through nonwoven fabric, point bond nonwoven fabric, and spunbond nonwoven fabric. Examples of the thermoplastic synthetic fiber include fibers formed of a thermoplastic synthetic resin such as polyethylene, polypropylene, and polyethylene terephthalate, and composite fibers formed of two types of thermoplastic synthetic resins. Use a nonwoven fabric having a mass per unit area of 10 to 60 g / m ² , more preferably 15 to 30 g / m ² , and a plastic film having a thickness of about 10 to 40 μm. Is preferred.

For the back sheet 3, it is preferable to use a plastic film having a thickness of about 10 to 40 μm, but in a substantial sense, a fiber nonwoven fabric that is liquid-impermeable can also be used. In addition, the plastic film used for the back sheet 3 can have a cloth-like touch by laminating a fiber nonwoven fabric on the clothing side surface.

The leak-proof sheet 31 of the leak-proof cuff 30 can be made of a nonwoven fabric or liquid-impervious plastic film that is made of thermoplastic synthetic fiber and has poor liquid permeability or liquid impermeability. As the nonwoven fabric, for example, a spunbond / meltblown / spunbond nonwoven fabric (SMS nonwoven fabric, spun-bonded / melt-blow / spun-bonded nonwoven fabric), air-through nonwoven fabric, point-bonded nonwoven fabric, spunbonded nonwoven fabric, or the like can be used.

For the superabsorbent polymer particles, for example, starch-based, acrylic acid-based, amino acid-based, etc., which can absorb water at least 10 times as much as its own weight, use a water-insoluble and water-swellable polymer. Can do. In the present invention, the superabsorbent polymer particles mean those formed in the form of fibers in addition to those formed in the form of particles. For the upper wrapping sheet 23a and the lower wrapping sheet 23b, a liquid-permeable nonwoven fabric or tissue paper formed of thermoplastic synthetic fibers can be used. The amount of the superabsorbent polymer particles used in the upper liquid-absorbing part 24 per unit area is preferably 100 to 400 g / m ² .

When water-absorbing fibers are used for the first liquid-absorbing layer 21, pulp fibers such as wood fluff pulp, regenerated fibers such as rayon staples, and a mixture thereof can be used.

FIG. 3 is a partial view of the urine absorbing pad 1 showing the state of the side portion 24c and the leak-proof cuff 30 when the urine absorbing pad 1 of FIG. 2 is worn and absorbs urine. The urine absorption pad 1 when not absorbing is shown. When the urine absorbing pad 1 is worn and curved in the longitudinal direction Y (see FIG. 4 to be described later), the leak-proof cuff 30 stands up like an imaginary line as the elastic member 32 contracts. When the urine absorbing pad 1 absorbs urine, in the side part 24c of the upper liquid absorption part 24, the superabsorbent polymer particles trapped therein absorb the urine and swell, and the upper part in the side part 24c. The wrapping sheet 23a and the surface sheet 2 that overlaps the wrapping sheet 23a are deformed, and the cross-sectional shape of the side portion 24c indicated by the phantom line changes to a swollen state as indicated by the solid line, and the thickness direction Z Increases by a maximum of H. The side portion 24c is directed downward in the figure due to the second liquid-absorbing layer 41 on the lower side and the lower wrapping sheet 23b joined to the wrapping sheet 43 of the second liquid-absorbing layer 41. It is difficult to swell, bulges upward, increases in height by dimension H, and rises toward the wearer's skin. The cuff part 34 where the fixing part 33 overlaps the side part 24c and rises from the base edge F also rises by a maximum dimension H, and changes from a virtual line state to a solid line state. As a result, the leak-proof cuff 30 erected at the side portion 24c approaches the wearer's skin by, for example, dimension H, and reduces the gap between the leak-proof cuff 30 and the skin or against the skin. And adheres strongly. In addition, the side part 24b which is not illustrated and the leak-proof cuff 30 which overlaps with it will show the same behavior as the side part 24c and the leak-proof cuff 30 which will overlap it, if urine is absorbed. In the leak-proof cuff 30 in which the cuff portion 34 can rise in this way, the fixing portion 33 is joined to the

side portions

24b and 24c, and the base edge F in the width direction X is the side portion 24b, It is located inside 24c.

3 are filled with the swollen superabsorbent polymer particles in close contact with each other to form a gel block. The

side portions

24b and 24c whose gel blocks cross the folding lines A and B in the longitudinal direction Y and extend between the

end portions

30a and 30a are flexible but difficult to bend become. The cuff portion 34 of the leak-proof cuff 30 that stands up from the

side portions

24b and 24c easily stands up in the entire length in the longitudinal direction Y excluding the end portion 30a.

The non-liquid-absorbing part 25 in the first liquid-absorbing layer 21 is also a part that enables urine to move from the top sheet 2 toward the second liquid-absorbing layer 22. In order to facilitate the movement, a hot melt adhesive for joining the top sheet 2 and the upper wrapping sheet 23a, a hot melt adhesive for joining the upper wrapping sheet 23a and the lower wrapping sheet 23b, and a lower part The hot melt adhesive for joining the wrapping sheet 23b and the wrapping sheet 43 of the second liquid-absorbing layer 41 is preferably applied intermittently. Further, in order to facilitate the movement of the urine, the non-liquid-absorbing portion 25 can be formed with an opening penetrating the upper wrapping sheet 23a and the lower wrapping sheet 23b.

The second liquid absorption layer 41 is a part for absorbing and holding urine that could not be absorbed by the first liquid absorption layer 21. The second core member 42 of the second liquid absorbing layer 41 is an aggregate of water absorbing fibers such as pulverized pulp. The same wrapping sheet 43 as the upper wrapping sheet 23a or the lower wrapping sheet 23b can be used. Further, when the amount of urine to be absorbed by the second liquid absorbing layer 41 is small, one or a plurality of tissue papers or the like may be used instead of the second core material and the wrapping sheet 43 illustrated in FIG. It is also possible to use a water absorbent sheet.

In an example of a method for forming the upper liquid absorbing portion 24 in the first liquid absorbing layer 21, a hot melt adhesive (not shown) is wrapped with one of the upper wrapping sheet 23a and the lower wrapping sheet 23b. After applying to the upper liquid absorption part 24 in a sheet | seat and spraying a superabsorbent polymer particle toward the upper liquid absorption part 24, the superabsorbent polymer particle currently spread even to the non-liquid absorption part 25 is removed. Thereafter, a hot melt adhesive is applied to the entire surface of the other wrapping sheet, the

wrapping sheets

23a and 23b are overlapped, and bonded together at the non-liquid-absorbing portion 25, so that high absorption is obtained between the

wrapping sheets

23a and 23b. The upper liquid-absorbing part 24 in which the absorbent polymer particles are accommodated and the non-liquid-absorbing part 25 in which the superabsorbent polymer particles are not substantially present can be obtained. In another example, as described in Japanese Patent Application Laid-Open No. 2010-22076, one of the upper wrapping sheet 23a and the lower wrapping sheet 23b is placed on a mold having an intake hole, By superposing the superabsorbent polymer from above while sucking from the intake holes, the superabsorbent polymer is deposited according to the shape of the mold. Thereafter, the upper liquid-absorbing part 24 and the non-liquid-absorbing part 25 are obtained by stacking and joining the other wrapping sheet coated with the hot melt adhesive to the non-liquid-absorbing part 25. Since the upper wrapping sheet 23a and the lower wrapping sheet 23b are joined to each other in the non-liquid-absorbing part 25, the superabsorbent polymer particles contained in the upper liquid-absorbing part 24 are the upper liquid-absorbing part 24. Even if it can move freely inside, it does not enter the non-liquid-absorbing portion 25.

The non-liquid-absorbing part 25 is a portion where the highly water-absorbing polymer particles do not exist as described above. However, due to the technical ability in the manufacturing process of the urine absorbing pad 1, the original action of the non-liquid-absorbing part 25 is achieved. This is a site where superabsorbent polymer particles may be present in an amount that does not significantly inhibit According to the present invention, in this sense, the non-liquid-absorbing portion 25 is substantially free of superabsorbent polymer particles.

FIG. 4 is a side view of the urine absorption pad 1 individually packaged. The urine absorbing pad 1 is folded with the topsheet 2 inside along the folding lines A and B in FIG. 1 so that the rear end N overlaps the central portion M and the front end L overlaps the rear end N. ing. A packaging sheet 71 formed of a non-woven fabric or a plastic film used for packaging the urine absorbing pad 1 is indicated by a virtual line. An adhesive 72 is applied to the back sheet 3 of the urine absorbing pad 1, and the adhesive 72 is covered and protected by a release paper 73. A preferable release paper 73 is bonded to the packaging sheet 71 so as not to be peeled off.

FIG. 5 shows the urine absorption pad 1 when the urine absorption pad 1 of FIG. 4 is unwrapped and the release paper 73 is peeled off and attached to the inner surface of the crotch 75 of the pants via the adhesive 72. 1 is a side view of FIG. The adhesive 72 is applied between the folding lines A and B, and the urine absorption pad 1 attached to the crotch 75 is affected by the folds when folded, and the front end L and the rear end. N tends to rise like a virtual line. When pants are worn and body pressure is applied to the urine absorbing pad 1, the urine absorbing pad 1 has a shape indicated by a solid line and the cuff portion 34 of the leak-proof cuff 30 is in a tension state in the longitudinal direction Y. However, when the crotch part 75 of the pants is separated from the body and the body pressure is no longer applied to the urine absorbing pad 1, the urine absorbing pad 1 again becomes a virtual line shape and the elastic member 32 of the cuff part 34 is in a relaxed state. The height becomes lower. However, in the urine absorbing pad 1, when the

side portions

24b and 24c absorb urine and the superabsorbent polymer particles form a gel block, the gel block crosses the folding lines A and B (see FIG. 1). ), The front end portion L and the rear end portion N of the urine absorbing pad 1 are restrained from rising as shown in the illustrated example, and the cuff portion 34 can be tensioned in the vertical direction Y as shown by the solid line. The cuff portion 34 in the tensioned state has a higher height in the thickness direction Z than the cuff portion 34 in the relaxed state, and is excellent in preventing side leakage of urine.

6 and 7 are a plan view of the urine absorbing pad 1 showing an example of the embodiment and a cross-sectional view taken along the line VII-VII in the plan view.

6 and 7 are formed with two compressed grooves 50 that are concave from the top sheet 2 toward the back sheet 3 and extend in the longitudinal direction Y. In the illustrated example, the compressed groove 50 is divided into portions 50a to 50g, but may be replaced with a series of portions that are not divided. The pressing groove 50 is located at a position overlapping the non-absorbing portion 25 of the first liquid absorbing layer 21. In the pressing groove 50, the top sheet 2, the upper wrapping sheet 23a, the lower wrapping sheet 23b, and the second liquid absorbing member. The wrapping sheet 43 of the layer 41 and the second core member 42 are in close contact with each other, and more preferably, the overlapping members are in close contact with each other in a mechanically entangled state. In such a state, the urine on the top sheet 2 easily moves from the bottom of the compression groove 50 to the second liquid absorption layer 22.

The present invention described based on the illustrated urine-absorbing pad 1 includes a urine-absorbing pad, a light incontinence pad, a panty liner, a sanitary napkin, etc. It can also be implemented as an absorbent article.

In the urine absorption pad 1 of the illustrated example, the upper liquid absorption portion 24 of the first liquid absorption layer 21 has the central portion 24a and the

side portions

24b and 24c. However, the urine absorption pad 1 has the central portion 24a. Is not necessarily present. However, it is natural that the presence of the central portion 24a makes the urine absorption pad 1 have a large amount of urine absorption, but it also has a structure that easily fits the wearer's shadow.

Moreover, since the

side parts

24b and 24c exist as a series in the vertical direction Y, the

side parts

24b and 24c when the superabsorbent polymer particles swell also function as a leakage barrier. . However, in the case where it is desired to avoid the fact that a gel block is formed in the upper liquid absorption part 24 provided in the central portion 24a and it becomes difficult to move urine from the first liquid absorption layer 21 to the second liquid absorption layer 41. The upper liquid-absorbing portion in the central portion 24a is divided into a plurality of, for example, three in the longitudinal direction Y, and a liquid-permeable non-liquid-absorbing portion 25 is provided between the central portions 24a. Even when the highly liquid-absorbing polymer particles form a gel block, the urine can be moved from the first liquid-absorbing layer 21 to the second liquid-absorbing layer 41 via the non-liquid-absorbing portion 25.

The urine absorbing pad 1 shown in FIGS. 1 to 7 has a liquid absorbing structure 10 having two liquid absorbing

layers

21 and 41. The present invention is a body fluid absorbing material having two or more liquid absorbing layers. It can be implemented with a sex article. For example, a third liquid absorption layer can be provided between the first liquid absorption layer 21 and the second liquid absorption layer 41. In addition, the third liquid absorbing layer can be provided only directly below the central portion 24a of the first liquid absorbing layer 21, and a portion corresponding to the central portion 24a of the urine absorbing pad 1 can be formed at a medium height. The second liquid absorption layer 41 can be formed at a middle height just below the central portion 24a. The second core material 42 of the second liquid absorption layer 41 may be a mixture of superabsorbent polymer particles and absorbent fibers. For example, the second core member 42 can contain 100 to 50% by weight of water-absorbing fibers and 0 to 50% by weight of absorbent polymer particles.

FIG. 8 is a view similar to FIG. 2 showing a urine absorption pad 101 as another example of the embodiment. In FIG. 8, the same reference numerals are used for the same structure as the urine absorbing pad 1 illustrated in FIGS. In the liquid-absorbing structure 110 of the urine-absorbing pad 1, the

side portions

124b and 124c and the central portion 124a are formed by individually covering the first core material 22 including the highly liquid-absorbing polymer particles with the wrapping sheet 123. The upper liquid absorption part 124 is formed.

The terms “joining” and “joining” as used herein integrate two objects by at least one of hot melt adhesive, heat sealing, sonic sealing, embossing. It means that.

In addition to the materials described in the present specification, the members constituting the bodily fluid absorbent article, in addition to the materials described in the present specification, materials that are usually used in this type of field and / or publicly known The material can be used without limitation.

In addition, the terms “first” and “second” used in the present specification are merely for distinguishing elements, positions, and the like in which the terms are used.

The disclosure relating to the present invention described above can be summarized at least in the following matters.

A liquid-permeable surface sheet 2 having a longitudinal direction Y, a lateral direction X, and a thickness direction Z and forming a skin-side surface 1a, and an impermeable liquid forming a clothing-side surface 1b that is the opposite surface of the skin-side surface. Each of the adhesive back sheet 3, the liquid absorbing structure 10 interposed between the top sheet 2 and the back sheet 3, and the pair of side edges 27 extending in the longitudinal direction Y of the liquid absorbing structure 10. In a body fluid absorbent article comprising a pair of leak-proof cuffs 30 extending along,
The liquid absorbing structure 10 includes a lower liquid absorbing part 41 facing the back sheet 3 and an upper liquid absorbing part 24 above the lower liquid absorbing part 41 and facing the top sheet 2. ,
The lower liquid-absorbing part 41 includes at least water-absorbing fibers as the liquid-absorbing material 42, and extends over the entire area in the longitudinal direction Y and the lateral direction X in the liquid-absorbing structure 10.
The upper liquid-absorbing portion 24 is formed by covering the liquid-absorbing material 22 containing at least the superabsorbent polymer particles with a liquid-permeable wrapping sheet, and the lateral direction X in the liquid-absorbing structure 10.

Side portions

24b and 24c that are individually formed on at least both side portions of the first and second portions and extend in the longitudinal direction Y.
Each of the pair of leak-proof cuffs 30 is bonded to the skin side surface 1a of the top sheet 2 and extends in the vertical direction Y, and is elastically extended in the vertical direction Y. A cuff 34 extending and contractible, and lying down so as to be able to stand up toward the outside in the lateral direction X of the body fluid absorbent article, and both ends in the longitudinal direction Y of the body fluid absorbent article. A pair of end portions 30a in a state where the fixed portion 33 and the cuff portion 34 are fixed;
Each of the pair of leak-proof cuffs 30 also has the body fluid absorbability characterized in that the fixing portion 33 overlaps the

side portions

24b and 24c formed individually via the top sheet 2. Goods.

The invention disclosed in the paragraph 0044 can include at least the following embodiments.
(1) In the lateral direction X, between the

side portions

24b and 24c, an intermediate portion that is a part of the upper liquid absorbing portion and is separated from each of the

side portions

24b and 24c. 24a is formed.
(2) The wrapping sheet is composed of an upper wrapping sheet 23a and a lower wrapping sheet 23b that extend between the pair of side edges of the liquid-absorbent structure and extend in the longitudinal direction and face each other in the thickness direction. By interposing the liquid-absorbing material 22 between the upper wrapping sheet 23a and the lower wrapping sheet 23b, the

side portions

24b and 24c are formed, and between the

side portions

24b and 24c. The upper wrapping sheet 23a and the lower wrapping sheet 23b are joined.
(3) The wrapping sheet includes an upper wrapping sheet 23a and a lower wrapping sheet 23b that extend between the pair of side edges of the liquid-absorbing structure and extend in the longitudinal direction and face each other in the thickness direction. By interposing the liquid absorbing material 22 between the upper wrapping sheet 23a and the lower wrapping sheet 23b, the

side portions

24b and 24c and the intermediate portion 24a are formed, and the side portion 24b 24c and the intermediate portion 24a, the upper wrapping sheet 23a and the lower wrapping sheet 23b are joined.
(4) In the first fold line A and the second fold line B in which the body fluid absorbent article extends in parallel to the lateral direction X, the body fluid absorbent article is folded in three with the top sheet 2 inside. Yes, the first and second folding lines A and B intersect the

side portions

24a and 24b of the upper liquid-absorbing portion 24, respectively.
(5) A boundary F between the fixing portion 33 and the cuff portion 34 is located on the inner side in the lateral direction X with respect to the

outer edges

27b and 27c in the lateral direction X of the

side portions

24a and 24b.
(6) The cuff portion 34 that is lying down so as to stand upright has the entire portion located between the pair of end portions 30 a overlapping the side portion 34.

1 Urine pad (Body fluid absorbent article)
DESCRIPTION OF SYMBOLS 1a Skin side surface 1b Clothing side surface 2 Top sheet 3 Back sheet 10 Liquid absorbing structure 22 1st core material (liquid absorbing material)
23a Upper wrapping sheet (wrapping sheet)
23b Lower wrapping sheet (wrapping sheet)
24 Upper liquid-absorbing part 24a

Central part

24b, 24c Side part 27

Side edge

27b, 27c of liquid-absorbing structure Lateral outer edge 30 of side part Leak-proof cuff 30a End part 33 Fixing part 34 Cuff part 41 Second Liquid absorption layer (lower liquid absorption part)
42 Second core material (Liquid absorbent material)
X Horizontal direction Y Vertical direction Z Thickness direction A 1st fold line B 2nd fold line F Base edge (boundary between the fixed part of the leak-proof cuff and the cuff part)

Claims

A liquid-permeable surface sheet that has a longitudinal direction, a lateral direction, and a thickness direction, and that forms a skin-side surface; a liquid-impermeable back sheet that forms a clothing-side surface that is the opposite surface of the skin-side surface; Bodily fluid absorption comprising a liquid-absorbing structure interposed between the top sheet and the back sheet, and a pair of leak-proof cuffs extending along each of the pair of side edges extending in the longitudinal direction of the liquid-absorbing structure. In the sex goods,
The liquid-absorbing structure has a lower liquid-absorbing part facing the back sheet, and an upper liquid-absorbing part above the lower liquid-absorbing part and facing the top sheet,
The lower liquid-absorbing part contains at least water-absorbing fibers as a liquid-absorbing material, and extends across the entire longitudinal and lateral directions of the liquid-absorbing structure,
The upper liquid-absorbing portion is formed by coating a liquid-absorbing material containing at least superabsorbent polymer particles with a liquid-permeable wrapping sheet, and at least one of the lateral directions in the liquid-absorbing structure. Having side portions that are individually formed on both side portions and extend in the longitudinal direction;
Each of the pair of leak-proof cuffs is bonded to the skin-side surface of the top sheet and extends in the longitudinal direction, and extends in a state of being elastically stretched in the longitudinal direction and is contractible. And the cuff part lying down so as to be able to stand up toward the outside in the lateral direction of the body fluid absorbent article, and the fixing part and the cuff part at both ends in the longitudinal direction of the body fluid absorbent article. A pair of ends in a fixed state;
Each of the pair of leak-proof cuffs is also the body fluid-absorbent article, wherein the fixing part overlaps the side part formed individually via the top sheet.
The intermediate part which is a part of said upper liquid absorption part, and is spaced apart from each of the said side parts is formed between the said side parts in the said horizontal direction. Body fluid absorbent article.
The upper wrapping sheet is composed of an upper wrapping sheet and a lower wrapping sheet that extend between the pair of side edges of the liquid-absorbing structure and extend in the longitudinal direction and face each other in the thickness direction. By interposing the liquid-absorbing material between the lower wrapping sheet and the lower wrapping sheet, the side portion is formed, and the upper wrapping sheet and the lower wrapping sheet are joined between the side portions. The body fluid absorbent article according to claim 1.
The upper wrapping sheet is composed of an upper wrapping sheet and a lower wrapping sheet that extend between the pair of side edges of the liquid-absorbing structure and extend in the longitudinal direction and face each other in the thickness direction. By interposing the liquid-absorbing material between the lower wrapping sheet and the lower wrapping sheet, the side portion and the intermediate portion are formed, and the upper wrapping sheet is formed between each of the side portions and the intermediate portion. The bodily fluid absorbent article according to claim 2, wherein the lower wrapping sheet is joined.
In the first folding line and the second folding line in which the body fluid absorbent article extends parallel to each other in the lateral direction, the body fluid absorbent article is in a state of being folded in three with the top sheet facing inward, The bodily fluid absorbent article according to claim 1 or 2, wherein two folding lines intersect with each of the side portions of the upper liquid absorbing part.
The bodily fluid absorbent article according to claim 1 or 2, wherein a boundary between the fixing portion and the cuff portion is located on an inner side in the lateral direction than an outer edge in the lateral direction of the side portion.
The bodily fluid absorbent article according to claim 1 or 2, wherein the cuff portion lying in a standing manner is such that the entire portion located between the pair of end portions overlaps the side portion.