CN212416094U

CN212416094U - Absorbent article

Info

Publication number: CN212416094U
Application number: CN202020191297.5U
Authority: CN
Inventors: 吉川善史
Original assignee: Libaud Co ltd
Current assignee: Libaud Co ltd
Priority date: 2019-02-20
Filing date: 2020-02-20
Publication date: 2021-01-29
Anticipated expiration: 2030-02-20
Also published as: JP7169222B2; DE202020000628U1; JP2020130645A

Abstract

The utility model provides a form and rise flap to the soft absorbent article of contact of skin when rising the flap and properly rising. An absorbent article (1) having a top sheet (2), a back sheet (3), and an absorbent body (4) provided therebetween, wherein a front side section (4A) and a rear side section (4C) of the absorbent body (4) are formed to be wider than an intermediate section (4B); a rising flap (6) formed by folding over a flap forming sheet (7) at a free end (11) is provided on the skin surface side of the absorbent article (1); a flap elastic member (8) and an acetate fiber aggregate (9) extending in the front-rear direction are arranged between one side part and the other side part of the free end (11) of the folded flap forming sheet body (7); the acetate fiber assembly (9) is provided at least in the narrowest part of the intermediate part (4B) in the front-rear direction; the flap elastic member (8) extends forward of the front end of the acetate aggregate (9) and rearward of the rear end.

Description

Absorbent article

Technical Field

The present invention relates to an absorbent article such as a disposable diaper, a urine pad, a light incontinence pad, a sanitary napkin, or the like.

Background

Conventionally, an absorbent article having a rising flap provided on the skin surface side in order to prevent leakage of excrement such as urine is widely known. The standing flap is generally provided with an elastic member, and thus, when the absorbent article is worn, the standing flap is raised by the contraction force of the elastic member, thereby preventing lateral leakage of urine or the like. Although it is important to improve the close contact between the standing flap and the skin of the wearer in order to improve the leakage resistance against urine and the like, in this case, the elastic member may be in relatively strong contact with the skin of the wearer, and as a result, the skin of the wearer may be strongly tightened by the elastic member or may feel uncomfortable.

In order to alleviate the contact of the elastic member provided to the standing flap with the skin of the wearer, patent document 1 discloses an absorbent article in which an annular edge portion is formed at the free end portion of the standing flap, and the elastic member is provided at a distance of 1mm or more from the top edge portion of the annular edge portion. Further, although not a standing flap, patent document 2 discloses a disposable diaper gather member including a tow open body to which cellulose acetate fibers are directly or indirectly fixed, and a stretchable member that stretches and contracts in one direction together with the tow open body.

Documents of the prior art

Patent document

Japanese patent application laid-open No. 2004-181253 of patent document 1

Japanese patent application laid-open No. 2018-059244 of patent document 2

SUMMERY OF THE UTILITY MODEL

Problem to be solved by utility model

Although the elastic member needs to be provided with a certain degree of tension in the raising flap in order to improve leakage resistance, if the close contact of the raising flap with the skin is improved, the contact with the skin is increased, and conversely, if the contact of the raising flap with the skin is reduced, the raising flap cannot be raised properly, and side leakage is likely to occur. Therefore, a standing flap that can achieve both of them is desired. In view of the above, an object of the present invention is to provide an absorbent article in which a flap is properly raised and the contact of the raised flap with the skin is soft.

Means for solving the problems

An absorbent article of the present invention that can solve the above-described problems includes an absorbent body, a top sheet provided on a skin surface side of the absorbent body, and a back sheet provided on a non-skin surface side of the absorbent body, wherein the absorbent body includes a front portion, a rear portion, and an intermediate portion between the front portion and the rear portion, and the front portion and the rear portion are formed wider than the intermediate portion; the skin surface side of the absorptive article is provided with a rising flap; the rising flap has a base as a rising starting point and a free end as a rising distal end, and is formed by folding over a flap forming sheet at the free end; a flap elastic member and an acetate fiber aggregate extending in the front-rear direction are provided between one side portion and the other side portion of the free end of the flap forming sheet body, the flap elastic member being folded over; the acetate fiber assembly is arranged at least at the narrowest part of the middle part in the front-back direction; the flap elastic member extends forward from the front side end of the acetate aggregate and rearward from the rear side end.

The absorbent article of the present invention is configured such that the acetate fiber aggregate and the flap elastic member are arranged together between the flap forming sheet bodies, and therefore the flap elastic member is less likely to strongly contact the skin of the wearer, and the flap cushioning property can be imparted to the standing flap. Therefore, in the narrowest portion of the intermediate portion of the absorbent body in which the standing flap stands high, the flap elastic member is less likely to strongly contact the skin of the wearer due to the acetate fiber aggregate. On the other hand, since the flap elastic member is provided so as to extend forward of the front side end and rearward of the rear side end of the acetate aggregate, the contraction force of the flap elastic member is not hindered by the acetate aggregate at both end portions of the flap elastic member. Therefore, the standing flap is easily raised toward the skin of the wearer, and the side leakage prevention effect of urine or the like is improved. Therefore, the absorbent article of the present invention can be formed so that the standing flap properly stands up to improve the leakage prevention effect of urine or the like, and the standing flap is soft to the skin of the wearer, and is excellent in wearing feeling.

Preferably, the acetate fiber aggregate is provided at a length of 50mm or more in the front-rear direction. This makes it possible to soften the contact of the raised flaps with the wearer's skin over a range greater than the crotch area of the wearer.

Preferably, the flap elastic is mounted to one side of the flap-forming sheet, and the acetate aggregate is disposed between the flap elastic and the other side of the flap-forming sheet. Therefore, the contraction force of the flap elastic member is directly transmitted to the flap forming sheet body, so that the rising flap can be raised more highly by the contraction force of the flap elastic member.

Preferably, the flap elastic is mounted to a side of the flap-forming blade by means of an adhesive. In this case, the acetate fiber aggregate is bonded to the other side portion of the flap-forming sheet body at a bonding region provided to the other side portion; the acetate fiber aggregate is adhered to one side part of the flap forming sheet body through an adhesive coated on the flap elastic component; the other part is not bonded to one side of the flap forming sheet. Preferably, the acetate fiber aggregate is bonded to the other side portion of the flap-forming sheet, and is not bonded to the one side portion of the flap-forming sheet. Therefore, in the one side portion of the free end of the flap forming sheet body, the contraction force of the flap elastic member is easily transmitted to the flap forming sheet body, and the contraction force of the flap elastic member is not easily hindered by the acetate fiber aggregate in the portion where the flap elastic member and the acetate fiber aggregate overlap.

The standing flap is configured to be folded back along a fold line extending in the front-rear direction between the base and the free end, for example. Preferably, in the thus configured standing flap, a flap distal end portion between the fold-over line and the free end is provided with a flap elastic member and an acetate aggregate; the flap elastic member is mounted to one side of the flap forming sheet; the other side portion of the flap forming sheet body is positioned on the skin surface side of the flap distal end portion in the laid-down state of the standing flap. Thus, when the flap is raised, the flap elastic member is easily brought into contact with the skin of the wearer by the acetate fiber aggregate, and the cushioning property against the skin of the wearer is improved.

Preferably, in the thus formed standing flap, the acetate aggregate is not provided between the base portion of the standing flap and the fold-over line. Thus, the standing flap is easily raised toward the skin of the wearer. Further, the standing flap may be folded thinly before use of the absorbent article.

The raised flap may be unfolded from the base to the free end. In this case, preferably, the flap elastic member is mounted to a side portion of the flap-forming sheet body; the flap forms one side portion of the sheet body, and is positioned on the skin surface side of the standing flap in the laid-down state of the standing flap. In the raised flap thus configured, the higher the raised flap is raised, the more easily the inner side surface in the width direction of the raised flap in the raised state comes into contact with the skin of the wearer. Therefore, in the flap-forming sheet body, the one side portion to which the flap elastic member is attached is positioned on the skin surface side of the standing flap in the laid-down state of the standing flap, so that when the standing flap is standing up, the one side portion of the flap-forming sheet body is easily positioned on the outer side surface in the width direction, and the flap elastic member easily contacts the skin of the wearer through the acetate fiber aggregate.

In the raising flap thus formed, the acetate fiber aggregate is preferably located in the vicinity of the free end of the base portion, apart from the base portion of the raising flap. Thereby, the standing flap is more likely to stand higher toward the skin of the wearer.

Preferably, the acetate fiber aggregate is formed of long fibers oriented in the front-rear direction. Accordingly, when the gather is formed on the raising flap by the contraction force of the flap elastic member, the acetate fiber is bent and folded in the front-rear direction, and the volume of the acetate fiber aggregate is increased, thereby improving the cushioning property of the raising flap.

Beneficial effects of the utility model

In the absorbent article of the present invention, the flap elastic member is less likely to strongly contact the skin of the wearer due to the acetate aggregate at the narrowest portion of the intermediate portion of the absorbent body in which the flap is raised high. On the other hand, in both end portions of the flap elastic member, the contraction force of the flap elastic member is not hindered by the acetate fiber aggregate. Therefore, the absorbent article of the present invention can raise the flap toward the skin of the wearer to improve the leakage prevention effect of urine and the like, and the raised flap is soft to the skin of the wearer, and is excellent in wearing comfort.

Drawings

Fig. 1 is a plan view of a urine pad as an example of an absorbent article of the present invention, viewed from a top sheet side.

Fig. 2 shows a cross-sectional view at ii-ii of the absorbent article shown in fig. 1.

Fig. 3 is a plan view of a light incontinence pad as viewed from the top sheet side, which is an example of the absorbent article of the present invention.

Fig. 4 shows a cross-sectional view at iv-iv of the absorbent article shown in fig. 3.

Description of the symbols

1. 1A, 1B: an absorbent article;

2: a topsheet;

3: a back sheet;

4: an absorbent body;

6: erecting a flap;

7: the flap forms a sheet; 7A: a side portion; 7B: the other side part;

8: a flap elastic member;

9: acetate fiber aggregate;

10: a base;

11: a free end;

12: and (6) folding the lines.

Detailed Description

The absorbent article of the present invention will be described with reference to the accompanying drawings. The present invention is not limited to the embodiments shown in the drawings. Fig. 1 and 2 show an example of a structure of a urine pad as an example of the absorbent article of the present invention. Fig. 1 shows a plan view of an absorbent article (diaper) viewed from the top sheet side, and fig. 2 shows a cross-sectional view at ii-ii of the absorbent article shown in fig. 1. In the drawings of the present application, arrow x indicates a width direction, arrow y indicates a front-rear direction, and a direction perpendicular to a plane formed by arrows x and y indicates a thickness direction z. In fig. 1, the upper side of the drawing sheet corresponds to the front side of the absorbent article, and the lower side of the drawing sheet corresponds to the rear side of the absorbent article.

The absorbent article 1(1A) has a top sheet 2, a back sheet 3, and an absorbent body 4 disposed therebetween. The top sheet 2 is disposed on the skin surface side of the absorbent body 4, and the back sheet 3 is disposed on the non-skin surface side of the absorbent body 4. The excrement that has passed through the top sheet 2 is absorbed by the absorbent body 4. The back sheet 3 prevents the excrement from leaking to the outside.

The absorbent article 1 has a front-back direction y and a width direction x. The front-back direction y is a direction extending in the front-back direction between the crotch of the wearer when the absorbent article is worn. The width direction x is a direction orthogonal to the front-back direction y on the same plane as the absorbent article, and corresponds to the left-right direction of the wearer when wearing the absorbent article. When the absorbent article is worn by a wearer, the side facing the skin of the wearer is the skin surface side, and the opposite side is the non-skin surface side.

The top sheet 2 is a sheet member disposed on the skin surface side of the absorbent body 4, and is provided to face the skin of the wearer when the absorbent article is worn. The topsheet 2 is preferably liquid permeable. As the top sheet 2, for example, a nonwoven fabric made of hydrophilic fibers such as cellulose, rayon, and cotton; or a nonwoven fabric formed of hydrophobic fibers of polyolefin (e.g., polypropylene, polyethylene), polyester (e.g., PET), polyamide (e.g., nylon), or the like, in which the surfaces of the hydrophobic fibers are hydrophilized by a surfactant. Further, as the top sheet 2, woven cloth, knitted cloth, perforated plastic cloth, or the like may be used.

The back sheet 3 is a sheet member disposed on the non-skin surface side of the absorbent body 4, and is preferably liquid impermeable. As the back sheet 3, a nonwoven fabric or a plastic film made of hydrophobic fibers such as polyolefin (e.g., polypropylene or polyethylene), polyester (e.g., PET), and polyamide (e.g., nylon) can be used. Further, a laminate of nonwoven fabric and plastic film may be used as the back sheet 3.

Preferably, in the case of using a nonwoven fabric as the top sheet 2 or the back sheet 3, a spunbond nonwoven fabric, a hot-rolled nonwoven fabric, a point-bond nonwoven fabric, a meltblown nonwoven fabric, an air-laid nonwoven fabric, an SMS nonwoven fabric, or the like can be used as the nonwoven fabric.

The absorbent body 4 is not particularly limited as long as it contains an absorbent material capable of absorbing excrement such as urine. As the absorbent body 4, for example, an absorbent body in which an absorbent material is formed into a formed body having a predetermined shape, or an absorbent body in which the formed body is covered with a covering sheet such as a paper sheet (for example, thin paper or tissue paper) or a liquid-permeable nonwoven fabric sheet may be used. Examples of the absorbent material include hydrophilic fibers such as pulp fibers, and water-absorbent resins such as polyacrylic acid-based, polyaspartic acid-based, cellulose-based, and starch/acrylonitrile-based resins. The water-absorbent material may contain polyolefin fibers such as polyethylene and polypropylene, polyester fibers such as PET, or heat-fusible fibers such as polyamide fibers. These hot-melt fibers may be subjected to hydrophilization treatment with a surfactant or the like in order to improve the affinity with urine or the like.

The absorbent material preferably contains hydrophilic fibers from the viewpoint of increasing the absorption rate of urine or the like. In addition, the absorbent material preferably contains a water-absorbent resin from the viewpoint of improving the absorption capacity. Therefore, the absorbent body 4 preferably contains hydrophilic fibers (particularly pulp fibers) and a water-absorbent resin. In this case, for example, it is preferable to use a hydrophilic fiber aggregate in which a water-absorbent resin is mixed or dispersed.

The absorbent body 4 may be a sheet-like absorbent body. The sheet-like absorbent material is formed with a water-absorbent resin between nonwoven fabrics and without pulp fibers. The sheet-like absorbent body formed in this manner can achieve a high absorption capacity because the water-absorbent resin is interposed between the nonwoven fabrics. Further, since the sheet-like absorbent body does not have pulp fibers between the nonwoven fabrics, it can be formed to be thin without bulkiness.

The sheet-like absorbent material may use water-absorbent fibers as the absorbent material. In this case, the sheet-like absorbent body may be formed to be thin without being bulky. Examples of the water-absorbent fibers include fibers containing protonated or salified carboxyl groups. For example, the water-absorbent fiber can be obtained by hydrolyzing an acrylic fiber to convert a nitrile group contained in the acrylic fiber into a carboxyl group. At this time, the carboxyl group contained in the water-absorbent fiber preferably forms an alkali metal salt or an ammonium salt. The water-absorbent fiber can be produced by immersing the hydrophilic fiber in acrylic acid to precipitate acrylic acid on the fiber surface.

The absorbent body 4 has a substantially hourglass-shaped plan shape. Specifically, the absorbent body 4 has a front side portion 4A and a back side portion 4C and an intermediate portion 4B therebetween, and the front side portion 4A and the back side portion 4C are formed to be wider than the width of the intermediate portion 4B. This prevents the absorbent body 4 from being easily warped even if it is sandwiched between the wearer's thighs and pressed in the width direction x. In the absorbent body 4, the front side portion 4A and the intermediate portion 4B are divided at an intermediate point in the front-rear direction y of the widest portion of the front side portion 4A (specifically, the rearmost position of the widest portion of the front side portion 4A) and the narrowest portion of the intermediate portion 4B (specifically, the foremost position of the narrowest portion of the intermediate portion 4B); the rear side portion 4C and the intermediate portion 4B are divided at an intermediate point in the front-rear direction y between the widest portion of the rear side portion 4C (specifically, the foremost position of the widest portion of the rear side portion 4C) and the narrowest portion of the intermediate portion 4B (specifically, the narrowest rearmost position of the intermediate portion 4B).

The absorbent article 1 is provided with a rising flap 6 on the skin surface side. By providing the standing flap 6, side leakage of urine or the like is prevented. The raising flap 6 is provided with a flap elastic member 8 extending in the front-rear direction y, and raising of the raising flap 6 is promoted by a contraction force of the flap elastic member 8.

The raising flap 6 has a base 10 as a raising start point and a free end 11 as a raising distal end, and a flap elastic member 8 is provided between the base 10 and the free end 11. In fig. 2, the base 10 of the standing flap 6 is joined to the top sheet 2, but the base 10 of the standing flap 6 may be joined to, for example, the back sheet 3 whose both side portions in the width direction x are folded back to the skin surface side of the absorbent body 4, or may be joined to both of them. Preferably, the raising flap 6 is formed to be raisable by joining its front and rear end portions to the top sheet 2 and/or the back sheet 3 and providing a flap elastic member 8 at a portion between the front and rear end portions.

Preferably, the flap 6 is formed by flap forming pieces 7, the flap forming piece 7 is folded at a free end 11 to form the flap 6, and the flap elastic member 8 is disposed between the folded flap forming pieces 7. That is, the flap elastic member 8 is provided between the one side portion 7A and the other side portion 7B of the free end 11 of the flap forming sheet 7 whose free end 11 is folded. In the figure, the flap-forming sheet 7 is joined to the top sheet 2 at the base 10.

The flap-forming sheet 7 may be formed of a liquid-impermeable plastic film or a liquid-impermeable nonwoven fabric, and a sheet material that can be used for the back sheet 3 may be used. The flap-forming sheet 7 may be formed of side sheets provided on both sides of the top sheet 2 in the width direction x. In this case, the inner side portion in the width direction x can be formed as the flap forming sheet 7 by the joining portion of the side sheet and the top sheet 2.

As shown in fig. 1, the flap elastic member 8 is provided at least at the narrowest portion of the central portion 4B of the absorbent body 4 in the front-rear direction y. Preferably, the flap elastic member 8 is provided at least from the front side portion 4A to the back side portion 4C of the absorbent body 4 in the front-back direction y, and more preferably, at least from the widest portion of the front side portion 4A to the widest portion of the back side portion 4C of the absorbent body 4. Preferably, the flap elastic members 8 are arranged continuously in the range of their front-rear direction y. In the case where the widest portion of the front side portion 4A of the absorbent body 4 is formed with a constant length in the front-rear direction y, the front-side end of the flap elastic member 8 is preferably located at the rearmost position of the widest portion of the front side portion 4A or forward from it in the front-rear direction y. In the case where the widest portion of the back side portion 4C of the absorbent body 4 is formed with a constant length in the front-rear direction y, the rear-side end of the flap elastic member 8 is preferably located at the rearmost position of the widest portion of the back side portion 4C or rearward therefrom in the front-rear direction y. By providing the flap elastic member 8 in this manner, the standing flap 6 stands up toward the skin of the wearer at the portion sandwiched between the thighs of the wearer, and lateral leakage of urine or the like can be prevented.

Preferably, the flap elastic 8 is mounted in tension directly or indirectly to the flap-forming sheet 7. Thus, the raising flap 6 is easily raised by the contraction force of the flap elastic member 8. The flap elastic member 8 is preferably attached at a stretch ratio of 1.2 times or more and 5.0 times or less, more preferably 1.5 times or more, further preferably 1.8 times or more; still more preferably 4.0 times or less, and still more preferably 3.5 times or less. The stretch ratio described here is 1.0 times in the unstretched state.

As the flap elastic member 8, an elastic material used for general absorbent articles, such as a polyurethane thread, a polyurethane film, or natural rubber, can be used. In addition, the same elastic material may be used for various elastic members described below.

From the viewpoint of preventing leakage of urine or the like, it is preferable that the flap 6 be raised as high as possible toward the skin of the wearer. In this case, however, the portion of the raised flap 6 provided with the flap elastic member 8 tends to strongly contact the skin of the wearer, resulting in a reduction in the wearing sensation. Here, in the absorbent article 1, the flap elastic member 8 and the acetate aggregate 9 are provided between the one side portion 7A and the other side portion 7B of the free end 11 of the flap forming sheet 7 whose free end 11 is folded back. The acetate fiber aggregate 9 can be formed flexibly as natural cellulose fibers such as cotton, and can be formed so as to be very bulky as compared with cellulose fibers, and has excellent elastic recovery force. Therefore, by arranging the acetate fiber aggregate 9 and the flap elastic member 8 so as to overlap between the folded flap forming sheet bodies 7, the flap 6 can be given cushioning properties, and the flap 6 can be made soft to the skin.

The flap elastic member 8 is provided to extend forward from the front side end of the acetate aggregate 9 and rearward from the rear side end. Specifically, the flap elastic member 8 is provided to extend continuously from a position forward of the front side end of the acetate aggregate 9 to a position rearward of the rear side end. By providing the flap elastic member 8 and the acetate aggregate 9 in this manner, the flap elastic member 8 is less likely to strongly contact the skin of the wearer by the acetate aggregate 9 at the narrowest portion of the intermediate portion 4B where the raising flap 6 is raised high. On the other hand, by providing the flap elastic member 8 so as not to overlap the acetate fiber aggregate 9 at both ends of the flap elastic member 8 in the front-rear direction y, the contraction force of the flap elastic member 8 is not hindered at both ends in the front-rear direction y. Therefore, the standing flap 6 is easily raised toward the skin of the wearer, and the side leakage prevention effect of urine or the like is improved. The flap elastic member 8 preferably extends forward by 10mm or more, more preferably 20mm or more, and still more preferably 30mm or more, from the front side end of the acetate aggregate 9; the rear side of the acetate fiber assembly 9 is preferably 10mm or more, more preferably 20mm or more, and still more preferably 30mm or more.

The positional relationship in the front-rear direction y between the flap elastic member 8 and the acetate fiber aggregate 9 is measured in a state where the contraction force of the flap elastic member 8 is not exhibited, for example, by finely cutting the flap elastic member 8. The measurement of various lengths or positions of the present invention is similarly performed in a state where the elastic member disposed in the absorbent article 1 is not subjected to the contraction force of the elastic member, such as by finely cutting the elastic member.

Although the acetate fiber assembly 9 may be provided at least at the narrowest portion of the intermediate portion 4B in the front-rear direction y, the acetate fiber assembly 9 is preferably provided at a length of 50mm or more, more preferably 80mm or more, and still more preferably 100mm or more in the front-rear direction y. This makes it possible to soften the contact of the standing flap 6 with the wearer's skin over a wider area than the crotch of the wearer. The upper limit of the length y of the acetate fiber assembly 9 in the front-rear direction is, for example, preferably 300mm or less, more preferably 250mm or less, and still more preferably 200mm or less. The width of the acetate fiber aggregate 9 is, for example, preferably 3mm or more, more preferably 5mm or more, and further preferably 8mm or more; further, it is preferably 30mm or less, more preferably 25mm or less, and further preferably 20mm or less.

Preferably, the acetate fiber aggregate 9 is not provided at the widest part of the front side end 4A of the absorbent body 4 and forward thereof and at the widest part of the rear side portion 4C and rearward thereof in the front-rear direction y. This can improve the air permeability of the standing flap 6 at the portion not overlapping with the acetate fiber assembly 9, and suppress hot flashes at the abdomen or buttocks of the wearer of the absorbent article 1. In addition, when the widest part of the front side portion 4A of the absorbent body 4 is formed to have a constant length in the front-rear direction y, the front side end of the acetate assembly 9 is preferably located more rearward than the rearmost position of the widest part of the front side portion 4A in the front-rear direction y. When the widest portion of the back side portion 4C of the absorbent body 4 is formed to have a constant length in the front-rear direction y, the rear side end of the acetate aggregate 9 is preferably positioned more forward than the foremost position of the widest portion of the back side portion 4C in the front-rear direction y.

As the acetate fibers, two types of cellulose diacetate fibers and cellulose triacetate fibers are widely used, but preferably, cellulose diacetate fibers are used as the acetate fibers. Preferably, cellulose diacetate is acetylated with an average of 2.22 or more and less than 2.76 hydroxyl groups among three hydroxyl groups contained in the repeating unit of anhydrous glucose of cellulose, that is, with an esterification degree of 2.22 or more and less than 2.76.

Preferably, the acetate fiber aggregate 9 is formed of long fibers oriented in the front-rear direction y. Specifically, the acetate fibers constituting the acetate fiber aggregate 9 are preferably constituted by long fibers, and the long fibers are oriented in the front-rear direction y. Accordingly, when the gather is formed on the raising flap 6 by the contraction force of the flap elastic member 8, the acetate fiber is bent and folded in the front-rear direction y, and the volume of the acetate fiber aggregate 9 is increased, thereby improving the cushioning property of the raising flap 6.

Preferably, the acetate fibers are used as long fiber bundles (filament bundles). For example, the acetate fiber aggregate 9 may be formed of a tow and sandwiched between the flap forming sheet bodies 7 folded at the free ends 11 in this state, or the acetate fiber aggregate 9 may be sandwiched between the flap forming sheet bodies 7 folded at the free ends 11 as tow open fibers. The length of the long fibers of the acetate fibers is preferably 5cm or more, more preferably 10cm or more, and still more preferably 15cm or more. The long fibers of the acetate fibers may extend continuously across the entire acetate fiber assembly 9 in the front-rear direction y.

The fineness of the acetate fiber is not particularly limited, but is preferably, for example, 0.1dtex to 10dtex from the viewpoint of sufficient strength for use.

The acetate fiber aggregate 9 may contain, as a main component, acetate fibers, and fibers other than acetate fibers. The acetate fiber assembly 9 preferably contains acetate fibers in a proportion of 50 mass% or more, more preferably 70 mass% or more, further preferably 80 mass% or more, and still more preferably 90 mass% or more. Particularly preferably, the acetate fiber aggregate 9 is constituted by only acetate fibers as a fiber component. On the other hand, it is preferable that the flap-forming sheet 7 does not contain acetate fibers.

Preferably, the acetate aggregate 9 is arranged in the vicinity of the free end 11 in comparison with the base 10 of the standing flap 6. As shown in fig. 1 and 2, for example, when the raising flap 6 is not folded over from the base 10 to the free end 11, the acetate aggregate 9 is preferably disposed away from the base 10 of the raising flap 6 and in the vicinity of the free end 11 as compared with the base 10. Similarly, the flap elastic member 8 is preferably provided such that the acetate fiber aggregate 9 is located away from the base 10 of the raising flap 6 and is located closer to the free end 11 than the base 10. As shown in fig. 3 and 4 described later, when the flap 6 is folded back along a fold line 12 extending in the front-rear direction y from the base 10 to the free end 11, the flap elastic member 8 and the acetate aggregate 9 are preferably provided at a flap distal end portion 13 from the fold line 12 to the free end 11. This makes it easier for the flap 6 to rise higher toward the skin of the wearer.

The acetate fiber aggregate 9 may be provided in parallel with the flap elastic member 8 or may be provided so as to surround the flap elastic member 8 when viewed in a cross section in the width direction x. Further, from the viewpoint of enabling the raising flap 6 to be raised higher by the contraction force of the flap elastic member 8, it is preferable that the flap elastic member 8 is attached to the flap forming sheet 7. Thereby, the contraction force of the flap elastic member 8 is directly transmitted to the flap forming sheet 7, and the raising of the raising flap 6 is promoted. Specifically, as shown in fig. 2, preferably, the flap elastic 8 is attached to one side portion 7A of the flap forming sheet 7, and the acetate aggregate 9 is provided between the flap elastic 8 and the other side portion 7B of the flap forming sheet 7. In this case, the flap forming sheet 7 has one side portion 7A on the side where the flap elastic member 8 is attached with the free end 11 therebetween. The base 10 of the raised flap 6 may be provided to one side portion 7A, the other side portion 7B, or both of the flap-forming sheet 7. In fig. 2, the base 10 is formed at one side portion 7A of the flap forming blade 7.

Preferably, the flap elastic 8 is mounted to the flap forming blade 7 by means of an adhesive. As the adhesive, a hot melt adhesive is preferably used, and a rubber hot melt adhesive is more preferably used. Further, it is preferable that a portion of the flap elastic member 8 overlapping the acetate aggregate 9 is not attached to the other side portion 7B sandwiching the free end 11 of the flap forming sheet 7.

Preferably, the acetate aggregate 9 is bonded to the other side portion 7B sandwiching the free end 11 of the flap-forming sheet 7. Specifically, it is preferable that the acetate fiber aggregate 9 is bonded to the other side portion 7B of the flap-forming sheet 7 at a bonding region provided to the other side portion 7B of the flap-forming sheet 7. Thus, even if the gather of the raised flap 6 extends and contracts in the front-rear direction y due to the extension and contraction of the flap elastic member 8, the acetate fiber aggregate 9 can be firmly fixed to a predetermined position of the flap forming sheet 7. Preferably, the acetate aggregate 9 is bonded to the bonding region of the other side portion 7B of the flap-forming sheet 7, and is provided continuously or intermittently in the front-rear direction y with a predetermined width. The width of the bonding region is preferably 3mm or more, more preferably 5mm or more, and further preferably 8mm or more; further, it is preferably 30mm or less, more preferably 25mm or less, and further preferably 20mm or less. When the bonded regions are provided intermittently in the front-rear direction y, the length of the intermittent portion in the front-rear direction y is preferably 50mm or less, more preferably 30mm or less, and still more preferably 20mm or less. In addition, the bonding region is preferably present at least within 30mm, more preferably within 20mm, further preferably within 10mm, from the front side end to the rear of the acetate fiber aggregate 9; preferably within 30mm, more preferably within 20mm, and further preferably within 10mm from the rear side end to the front of the acetate fiber aggregate 9.

On the other hand, the acetate aggregate 9 is preferably not bonded to the one side portion 7A sandwiching the free end 11 of the flap forming sheet 7, or is preferably bonded to the one side portion 7A only through a limited portion. In the latter case, the acetate aggregate 9 is preferably bonded to the one side portion 7A of the flap-forming sheet 7 with an adhesive applied to the flap elastic member 8, and the other portion is preferably not bonded to the one side portion 7A of the flap-forming sheet 7. Thus, in the one side portion 7A sandwiching the free end 11 of the flap forming sheet 7, the contraction force of the flap elastic member 8 is easily transmitted to the flap forming sheet 7, and the contraction force of the flap elastic member 8 is not easily hindered by the acetate aggregate 9 at the portion where the flap elastic member 8 and the acetate aggregate 9 overlap.

Either one of the one side portion 7A and the other side portion 7B of the standing flap 6 sandwiching the free end 11 of the flap-forming sheet 7 may face the skin surface side of the absorbent article 1. Preferably, the flap formation sheet 7 is formed such that the other side portion 7B of the flap formation sheet 6, which has a higher cushioning property when standing, contacts the skin of the wearer. That is, the standing flap 6 is preferably formed to contact the skin of the wearer with the other side portion 7B of the free end 11 of the flap-forming sheet 7 interposed therebetween.

As shown in fig. 1 and 2, in the absorbent article 1A, the standing flap 6 is not folded back from the base 10 to the free end 11, but in this case, it is preferable that the one side portion 7A of the flap forming sheet 7 is positioned on the skin surface side of the standing flap 6 in the laid-down state of the standing flap 6. In the absorbent article 1A, the higher the rising flap 6 rises, the more easily the inner side surface in the width direction x of the rising flap 6 in the standing state comes into contact with the skin of the wearer. Therefore, since the one side portion 7A of the flap elastic member 8 is attached to the flap forming sheet 7 and is positioned on the skin surface side of the standing flap 6 in the laid-down state of the standing flap 6, the one side portion 7A of the flap forming sheet 7 is easily positioned on the outer side surface in the width direction x when the standing flap 6 stands up, and the flap elastic member 8 is easily brought into contact with the skin of the wearer through the acetate fiber aggregate 9. In addition, when the contraction force of the flap elastic member 8 is not so strong, the rising of the rising flap 6 is suppressed, and the outer side surface of the rising flap 6 in the width direction x in the standing state may be more likely to contact the skin of the wearer. In this case, the other side portion 7B of the flap-forming sheet 7 may be positioned on the skin surface side of the flap 6 in the laid-down state of the flap 6.

Fig. 3 and 4 show another example of the absorbent article of the present invention, which is a light incontinence pad. Fig. 3 shows a plan view of an absorbent article (light incontinence pad) viewed from the skin side, and fig. 4 shows a cross-sectional view at iv-iv of the absorbent article shown in fig. 3. In the absorbent article shown in fig. 3 and 4, the same components as those in the absorbent article of fig. 1 and 2 are denoted by the same reference numerals, and the above description is referred to for details of these components.

The absorbent article 1(1B) has a top sheet 2 and a back sheet 3 and an absorbent body 4 disposed therebetween, and an interleaving paper 5 is further disposed between the back sheet 3 and the absorbent body 4. The shape retention of the absorbent article 1B can be improved by the interleaving paper 5. The interleaving paper 5 may be composed of crepe paper or nonwoven fabric. The interleaving paper 5 may not be provided.

In the absorbent article 1B, the flap 6 is folded back along a fold line 12 extending in the front-rear direction y between the base 10 and the free end 11, and the flap elastic member 8 and the acetate aggregate 9 are provided at a flap distal end portion 13 which is a portion between the fold line 12 and the free end 11. In the absorbent article 1B thus formed, the flap elastic member 8 is preferably attached to the one side portion 7A sandwiching the free end 11 of the flap forming sheet 7, and the other side portion 7B of the flap forming sheet 7 is preferably positioned on the skin surface side of the flap distal end portion 13 in a state where the flap 6 is laid down, that is, in a state where the flap 6 is folded. Thus, when the flap 6 is raised, the flap elastic member 8 is easily brought into contact with the skin of the wearer by the acetate fiber aggregate 9, and the cushioning property against the skin of the wearer is improved. In the absorbent article 1B, the base 10 is formed on the other side portion 7B of the flap-forming sheet 7.

In the absorbent article 1B, the acetate fiber aggregate 9 is preferably not provided in the flap rising portion 14, which is a portion between the base 10 of the rising flap 6 and the fold-over line 12. This facilitates the rising flap 6 to rise high toward the skin of the wearer. Before the absorbent article 1B is used, the standing flap 6 may be folded thinly. On the other hand, the flap elastic member 8 may be provided to the flap rising portion 14.

In fig. 3 and 4, the fold-over line 12 of the raised flap 6 is formed at the outer end of the flap distal end portion 13 in the width direction x, but the fold-over line 12 of the raised flap 6 may be formed at the inner end of the flap distal end portion 13 in the width direction x. In this case, the free end of the raised flap 6 is located at the outer end of the flap distal end portion 13 in the width direction x.

Although the absorbent article of the present invention has been described above with reference to the drawings, the absorbent article of the present invention is not limited to the diaper or light incontinence pad shown in the drawings, and may be a disposable diaper or sanitary napkin.

In the case where the absorbent article is a disposable diaper, the disposable diaper is composed of, for example, a front abdominal section, a back section, and a crotch section including an absorber and located between the front abdominal section and the back section. The front abdominal region corresponds to a portion that comes into contact with the abdominal side of the wearer when the disposable diaper is worn, and the rear back region corresponds to a portion that comes into contact with the back side of the wearer when the disposable diaper is worn. The crotch portion is located between the front abdominal portion and the rear abdominal portion and corresponds to a portion that contacts the crotch of the wearer.

The disposable diaper may be a tape-type disposable diaper or a pants-type disposable diaper. The tape-type disposable diaper is configured, for example, by providing fixing members at both ends in the width direction of the back part, and by fixing the fixing members to the front abdominal part, the shape of underwear can be formed when worn. An underpants-type disposable diaper has an underpants shape having a waist opening and a pair of leg openings, and is formed into the shape of underpants before wearing.

When the water-absorbent article is a disposable diaper, the disposable diaper is formed with a laminate in which an absorbent body is disposed between a top sheet and a back sheet in order to form a front abdominal section, a back section, and a crotch section located between the front abdominal section and the back section. Further, the disposable diaper may be configured such that: an absorbent body is provided in a crotch portion of an exterior member having a front abdominal section, a back section, and a crotch portion located between the front abdominal section and the back section, and an absorbent body is disposed between a top sheet and a back sheet. In the latter case, the outer covering member is formed in the shape of underwear, whereby the outer covering member can be used as a pants-type disposable diaper. In either case, the absorbent article of the present invention can be obtained by providing the standing flap on the skin surface side (for example, top sheet) of the absorbent article, and forming the absorbent body and the standing flap as described above.

Claims

1. An absorbent article having an absorbent body, a top sheet provided on a skin surface side of the absorbent body, and a back sheet provided on a non-skin surface side of the absorbent body,

the absorbent body has a front side portion, a back side portion, and an intermediate portion between the front side portion and the back side portion, the front side portion and the back side portion being formed to be wider than the intermediate portion;

a rising flap is arranged on the skin surface side of the absorbent article;

the raising flap has a base as a raising starting point and a free end as a raising distal end, and is formed by folding over a flap forming sheet at the free end;

a flap elastic member and an acetate fiber aggregate extending in the front-rear direction are provided between one side portion and the other side portion of the free end of the flap forming sheet body, the flap elastic member being folded back and forth;

the acetate fiber assembly is provided at least at the narrowest part of the intermediate part in the front-rear direction;

the flap elastic member extends forward from the front side end of the acetate aggregate and rearward from the rear side end.

2. The absorbent article according to claim 1, wherein the acetate fiber aggregate is provided at a length of 50mm or more in the front-rear direction.

3. The absorbent article of claim 1 wherein the flap elastic member is mounted to the one side of the flap-forming sheet;

an acetate fiber aggregate is arranged between the flap elastic member and the other side part of the flap forming sheet body.

4. The absorbent article of claim 3 wherein the flap elastic member is mounted to the one side of the flap-forming sheet by an adhesive;

the acetate fiber aggregate is bonded to the other side part of the flap forming sheet body in a bonding area provided to the other side part; adhering to the one side of the flap-forming sheet by an adhesive applied to the flap elastic; the other part is not bonded to the one side of the flap-forming sheet.

5. The absorbent article of claim 3 wherein the acetate assembly is bonded to the other side of the flap-forming sheet and is not bonded to the one side of the flap-forming sheet.

6. The absorbent article according to any one of claims 3 to 5, wherein the standing flap is folded along a folding line extending in a front-rear direction between the base portion and the free end;

the flap elastic member and the acetate aggregate are provided to a flap distal end portion between the fold line and the free end;

the flap forming sheet has the other side portion located on the skin surface side of the flap distal end portion in a laid-down state of the standing flap.

7. The absorbent article of claim 6 wherein the acetate assembly is not disposed between the base of the raised flap and the fold-over line.

8. The absorbent article of any of claims 3-5 wherein the riser flap is not folded over between from the base to the free end;

the flap forming sheet has the one side portion located on a skin surface side of the flap in a laid-down state of the flap.

9. The absorbent article according to claim 8, wherein the acetate fiber aggregate is provided so as to be located farther from the base portion of the raising flap than the base portion is in the vicinity of the free end.

10. The absorbent article according to any one of claims 1 to 5, wherein the acetate fiber aggregate is formed of long fibers oriented in the front-rear direction.