JP7169222B2 - absorbent article - Google Patents

Description

The present invention relates to absorbent articles such as disposable diapers, urine pads, light incontinence pads, and sanitary napkins.

2. Description of the Related Art Conventionally, there has been known an absorbent article provided with a rising flap on the skin surface side in order to prevent leakage of excrement such as urine. The rising flaps are usually provided with an elastic member, so that when the absorbent article is put on, the rising flaps are raised by the contractile force of the elastic member to prevent side leakage of urine or the like. In order to improve leakage prevention of urine, etc., it is important to increase the adhesion between the rising flap and the wearer's skin. As a result, depending on the wearer, the skin may be strongly tightened by the elastic member, or the wearer may feel discomfort.

In order to reduce contact with the wearer's skin of the elastic member provided on the rise flap, Patent Document 1 discloses that an annular edge is formed at the free end of the rise flap, and the top edge of the annular edge An absorbent article is disclosed in which elastic members are provided at intervals of 1 mm or more. In addition, although it is not a rising flap, Patent Document 2 discloses a gather for a disposable diaper provided with an elastic member to which a tow spread body of cellulose acetate fibers is directly or indirectly fixed and which expands and contracts in one direction together with the spread body. A member is disclosed.

Japanese Patent Application Laid-Open No. 2004-181253 JP 2018-059244 A

In order to improve the leakproofness of the rise flap, it is necessary to install the elastic member with a certain amount of tension. If the contact of the rising flaps against the skin is weakened, the rising flaps do not stand up properly, and side leakage tends to occur. Therefore, it is desirable if there is a rising flap that achieves both of them. The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an absorbent article in which the rising flaps are preferably raised and the rising flaps are flexibly formed to contact the skin.

The absorbent article of the present invention, which can solve the above problems, comprises an absorbent body, a top sheet provided on the skin side of the absorbent body, and a back sheet provided on the non-skin side of the absorbent body. wherein the absorbent body has a front side portion, a back side portion and a middle portion therebetween, the front side portion and the back side portion being wider than the middle portion; the absorbent article A rising flap is provided on the skin surface side of the; the rising flap has a base that is the starting point of the rising and a free end that is the tip of the rising, and is formed by folding back the 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 portion and the other portion sandwiching the free end of the flap forming sheet; The flap elastic member is provided at least in the narrow portion; characterized in that it extends forward from the front end of the acetate fiber aggregate and extends rearward from the rear end.

In the absorbent article of the present invention, the acetate fiber assembly is disposed between the folded flap-forming sheets together with the flap elastic member, so that the flap elastic member does not strongly contact the wearer's skin, and the rise flap can provide cushioning properties. Therefore, at the narrowest portion of the intermediate portion of the absorbent body where the rising flap stands high, the acetate fiber assembly prevents the flap elastic member from coming into strong contact with the wearer's skin. On the other hand, since the flap elastic member is provided so as to extend forward from the front end of the acetate fiber assembly and to extend rearward from the rear end, the acetate fiber assembly provides flap elasticity at both ends of the flap elastic member. The contractile force of the member is not hindered. As a result, the rising flap can be easily raised toward the wearer's skin, and the effect of preventing side leakage of urine or the like is enhanced. Therefore, in the absorbent article of the present invention, the rising flaps can be suitably raised to enhance the effect of preventing leakage of urine and the like, and the rising flaps can flexibly contact the wearer's skin, resulting in comfortable wearing. become excellent.

It is preferable that the acetate fiber assembly is provided with a length of 50 mm or more in the front-rear direction. This makes it possible for the rising flap to make soft contact with the wearer's skin over a wider range of the wearer's crotch region.

Preferably, the flap elastic member is attached to one portion of the flap forming sheet, and the acetate fiber assembly is provided between the flap elastic member and the other portion of the flap forming sheet. As a result, the contractile force of the flap elastic member is directly transmitted to the flap forming sheet, and the contractile force of the flap elastic member allows the rising flap to stand up higher.

The flap elastic member is preferably attached to one portion of the flap forming sheet with an adhesive. In this case, the acetate fiber aggregate is adhered to the other portion of the flap forming sheet in the adhesive region provided on the other portion of the flap forming sheet, and the acetate fiber aggregate is bonded to the flap elastic member on one portion of the flap forming sheet. It is preferable that the adhesive is applied and the other portion is not adhered to the one portion of the flap forming sheet. It is also preferred that the acetate fiber assembly is adhered to the other portion of the flap-forming sheet and not adhered to the one portion of the flap-forming sheet. As a result, the contractile force of the flap elastic member is more likely to be transmitted to the flap forming sheet at one portion sandwiching the free end of the flap forming sheet, and the contractile force of the flap elastic member is at the portion where the flap elastic member overlaps the acetate fiber assembly. is less likely to be inhibited by the acetate fiber assembly.

For example, the rising flap is folded back along a folding line extending in the front-rear direction between the base and the free end. In the rising flap configured in this way, the flap elastic member and the acetate fiber assembly are provided at the tip of the flap between the folding line and the free end, the flap elastic member is attached to one part of the flap forming sheet, and the flap It is preferable that the other portion of the forming sheet is positioned on the skin surface side of the tip portion of the flap when the rising flap is laid down. As a result, when the rising flap is raised, the flap elastic member easily comes into contact with the wearer's skin via the acetate fiber assembly, and the cushioning property against the wearer's skin is enhanced.

In the rising flap formed as described above, it is preferable that the acetate fiber assembly is not provided between the base of the rising flap and the folding line. This makes it easy for the rising flap to rise high toward the wearer's skin. Also, the rising flaps can be folded thinly before using the absorbent article.

The riser flaps may be unfolded between the base and the free end. In this case, it is preferable that the flap elastic member is attached to one portion of the flap forming sheet, and the one portion of the flap forming sheet is positioned on the skin surface side of the rising flap when the rising flap is laid down. In the rising flap configured in this way, the higher the rising flap rises, the easier it is for the inner surface of the rising flap in the width direction to come into contact with the wearer's skin in the standing state. Therefore, one part of the flap forming sheet to which the flap elastic member is attached is positioned on the skin surface side of the rising flap when the rising flap is laid down. The flap elastic member is likely to come into contact with the wearer's skin via the acetate fiber assembly.

In the riser flap formed as described above, the acetate fiber assembly is preferably spaced apart from the base of the riser flap, and preferably closer to the free end than the base. This makes it easier for the rise flap to rise higher toward the wearer's skin.

The acetate fiber assembly is preferably formed from long fibers oriented in the front-rear direction. As a result, when gathers are formed in the rising flap by the contractile force of the flap elastic member, the acetate fibers are bent or folded in the front-rear direction to increase the bulk of the acetate fiber assembly, thereby enhancing the cushioning properties of the rising flap. can be done.

In the absorbent article of the present invention, the acetate fiber aggregate prevents the flap elastic member from coming into strong contact with the wearer's skin at the narrowest portion of the middle portion of the absorbent body where the rising flap stands high. On the other hand, at both ends of the flap elastic member, the contractile force of the flap elastic member is not hindered by the acetate fiber assembly. Therefore, in the absorbent article of the present invention, the rising flaps can be raised toward the wearer's skin, and the effect of preventing leakage of urine and the like can be enhanced. It becomes a thing and becomes a thing excellent in a feeling of wearing.

As an example of the absorbent article of the present invention, a plan view of a urine pad viewed from the top sheet side is shown. 2 shows a II-II cross-sectional view of the absorbent article shown in FIG. 1; FIG. As an example of the absorbent article of this invention, the top view which looked at the light incontinence pad from the top sheet side is represented. 4 represents a cross-sectional view of the absorbent article shown in FIG. 3 taken along line IV-IV.

The absorbent article of the present invention will be described with reference to the drawings. The invention is not limited to the embodiments shown in the drawings. FIGS. 1 and 2 show a configuration example 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 (urinary pad) viewed from the top sheet side, and FIG. 2 shows a II-II sectional view of the absorbent article shown in FIG. In the drawings of the present application, the arrow x represents the width direction, the arrow y represents the front-rear direction, and the direction perpendicular to the plane formed by the arrows x and y represents the thickness direction z. In FIG. 1, the upper side of the drawing corresponds to the front side of the absorbent article, and the lower side of the drawing 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 provided therebetween. The top sheet 2 is arranged on the skin side of the absorbent body 4, and the back sheet 3 is arranged on the non-skin side of the absorbent body 4. - 特許庁Excrement that permeates the top sheet 2 is accommodated by the absorbent body 4 . The back sheet 3 prevents excrement from leaking to the outside.

The absorbent article 1 has a front-rear direction y and a width direction x. The front-rear direction y corresponds to the direction extending in the front-rear direction between the wearer's crotch when the absorbent article is worn. The width direction x means a direction that is on the same plane as the absorbent article and perpendicular to the front-rear direction y, and corresponds to the lateral direction of the wearer when wearing the absorbent article. When the absorbent article is worn by the wearer, the side facing the wearer's skin is the skin side, and the opposite side is the non-skin side.

The top sheet 2 is a sheet member arranged on the skin surface side of the absorbent body 4, and is provided so as to face the wearer's skin when the absorbent article is worn. The top sheet 2 is preferably liquid permeable. As the top sheet 2, for example, a nonwoven fabric formed from hydrophilic fibers such as cellulose, rayon, and cotton; A nonwoven fabric formed from hydrophobic fibers in which the surface of hydrophobic fibers is hydrophilized with a surfactant can be used. Moreover, as the top sheet 2, a woven fabric, a knitted fabric, a perforated plastic film, or the like may be used.

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

When a nonwoven fabric is used as the top sheet 2 or the back sheet 3, it is preferable to use a spunbonded nonwoven fabric, an air-through nonwoven fabric, a point-bonded nonwoven fabric, a melt-blown nonwoven fabric, an air-laid nonwoven fabric, an SMS nonwoven fabric, or the like.

The absorber 4 is not particularly limited as long as it contains an absorbent material capable of absorbing excrement such as urine. As the absorber 4, for example, a molded body obtained by molding an absorbent material into a predetermined shape is used, or the molded body is covered with a covering sheet such as a paper sheet (eg, tissue paper or thin paper) or a liquid-permeable nonwoven fabric sheet. can be used. Examples of absorbent materials 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 materials. The absorbent material may also include polyolefin fibers such as polyethylene and polypropylene, polyester fibers such as PET, and heat-fusible fibers such as polyamide fibers. These heat-fusible fibers may be hydrophilized with a surfactant or the like in order to increase affinity with urine or the like.

The absorbent material preferably contains hydrophilic fibers in order to increase the rate of absorption of urine and the like. Moreover, from the viewpoint of increasing the absorption capacity, the absorbent material preferably contains a water absorbent resin. Therefore, the absorber 4 preferably contains hydrophilic fibers (especially pulp fibers) and a water absorbent resin. In this case, it is preferable to use, for example, an aggregate of hydrophilic fibers mixed with or sprinkled with a water absorbent resin.

The absorbent body 4 may be a sheet absorbent body. Examples of sheet-like absorbent bodies include those formed so as to contain a water-absorbing resin between non-woven fabrics and not contain pulp fibers. The sheet-like absorbent body thus formed has a water-absorbing resin between the nonwoven fabrics, so that a high absorption capacity can be realized. Moreover, since the sheet-like absorbent body does not have pulp fibers between the nonwoven fabrics, it can be formed thin without being bulky.

The sheet-like absorbent body may use water absorbent fibers as the absorbent material. Also in this case, the sheet-like absorbent body is formed thin and not bulky. Absorbent fibers include fibers containing protonated or salted carboxyl groups. For example, water-absorbing fibers can be obtained by hydrolyzing acrylic fibers to convert nitrile groups contained in the acrylic fibers into carboxyl groups. At this time, the carboxyl groups contained in the water-absorbing fibers preferably form an alkali metal salt or an ammonium salt. Also, the water-absorbent fiber can be produced by immersing a hydrophilic fiber in acrylic acid to precipitate the acrylic acid on the fiber surface.

The absorber 4 has a substantially hourglass planar shape. Specifically, the absorbent body 4 has a front side portion 4A, a rear side portion 4C, and an intermediate portion 4B therebetween, and the front side portion 4A and the rear side portion 4C are formed wider than the intermediate portion 4B. there is As a result, even if the absorber 4 is sandwiched between the thighs of the wearer and pressed in the width direction x, the absorber 4 is less likely to be distorted. In the absorbent body 4, the front portion 4A and the intermediate portion 4B are defined as the widest portion of the front portion 4A (specifically, the rearmost position of the widest portion of the front portion 4A) and the intermediate portion 4B. The narrow portion (specifically, the frontmost position of the narrowest portion of the intermediate portion 4B) is divided at the intermediate point in the front-rear direction y, and the rear portion 4C and the intermediate portion 4B are separated from each other by the rear portion. The widest part of 4C (specifically, the frontmost position of the widest part of the rear part 4C) and the narrowest part of the intermediate part 4B (specifically, the narrowest part of the intermediate part 4B). The rearmost position of the part) is divided at the midpoint in the front-rear direction y.

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

The rising flap 6 has a base portion 10 that serves as a starting point for rising and a free end 11 that serves as a leading end of the rising. In FIG. 2, the base 10 of the rise flap 6 is joined to the top sheet 2, but the base 10 of the rise flap 6 is a back sheet in which both sides in the width direction x are folded back toward the skin surface of the absorbent body 4, for example. 3 or both. The front and rear ends of the rising flap 6 are joined to the top sheet 2 and/or the back sheet 3, and a flap elastic member 8 is provided between the front and rear ends. It is preferably formed to be able to stand upright.

The rising flap 6 can be composed of a flap forming sheet 7 , and the rising flap 6 is formed by folding back the flap forming sheet 7 at the free end 11 , and the flap elastic member 8 is provided between the folded flap forming sheets 7 . distributed. That is, the flap elastic member 8 is provided between the one portion 7A and the other portion 7B sandwiching the free end 11 of the flap forming sheet 7 folded back at the free end 11 . In the drawings, the flap-forming sheet 7 is joined to the topsheet 2 at the base 10 .

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

As shown in FIG. 1, the flap elastic member 8 is provided at least at the narrowest portion of the intermediate portion 4B of the absorbent body 4 with respect to the front-rear direction y. Preferably, the flap elastic member 8 is provided at least from the front side portion 4A to the rear side portion 4C of the absorbent body 4 in the front-rear direction y, and more preferably the widest portion of the front side portion 4A of the absorbent body 4. to the widest portion of the rear side portion 4C. It is preferable that the flap elastic member 8 is continuously provided in the range of the front-rear direction y. When the widest portion of the front side portion 4A of the absorbent body 4 is formed with a certain length in the front-rear direction y, the front end of the flap elastic member 8 extends from the front side portion 4A in the front-rear direction y. It is preferably at the rearmost position of the widest portion or further forward. When the widest portion of the rear side portion 4C of the absorbent body 4 is formed with a certain length in the front-rear direction y, the rear end of the flap elastic member 8 is positioned on the rear side in the front-rear direction y. It is preferably located at the frontmost position of the widest portion of the portion 4C or further behind it. By providing the flap elastic member 8 in this manner, the rising flap 6 rises toward the wearer's skin at the portion sandwiched between the wearer's thighs, and side leakage of urine and the like can be prevented.

The flap elastic member 8 is preferably attached directly or indirectly to the flap forming sheet 7 in a stretched state. As a result, the contractile force of the flap elastic member 8 makes it easier for the rising flap 6 to rise. The flap elastic member 8 is preferably attached at an extension 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, and 4.0 times. It is more preferably 3.5 times or less, more preferably 3.5 times or less. The expansion ratio described here is 1.0 times in the non-expanded state.

As the flap elastic member 8, an elastic stretchable material such as polyurethane thread, polyurethane film, natural rubber, or the like, which is used in ordinary absorbent articles, can be used. It should be noted that similar elastic stretchable materials can be used for various elastic members described below.

From the viewpoint of enhancing leakproofness, the rising flap 6 preferably rises toward the wearer's skin as high as possible. However, in this case, the portion of the rising flap 6 provided with the flap elastic member 8 tends to come into strong contact with the wearer's skin, leading to a decrease in wearing comfort. Therefore, in the absorbent article 1, the acetate fiber assembly 9 is provided together with the flap elastic member 8 between the one portion 7A and the other portion 7B sandwiching the free end 11 of the flap forming sheet 7 folded back at the free end 11. . The acetate fiber assembly 9 can be formed as soft as natural cellulose fibers such as cotton, and can be formed to be much bulkier than cellulose fibers, resulting in excellent elastic recovery. Therefore, by stacking the acetate fiber assembly 9 on the flap elastic member 8 and arranging it between the folded flap forming sheets 7, the rising flap 6 is provided with cushioning properties, and the contact of the rising flap 6 to the skin is prevented. can be flexible.

The flap elastic member 8 is provided so as to extend forward from the front end of the acetate fiber assembly 9 and backward from the rear end. Specifically, the flap elastic member 8 is provided so as to continuously extend from a position forward of the front end of the acetate fiber assembly 9 to a position rearward of the rear end. By providing the flap elastic member 8 and the acetate fiber assembly 9 in this way, the flap elastic member 8 is supported by the acetate fiber assembly 9 at the narrowest part of the intermediate portion 4B where the rising flap 6 stands up high. It becomes hard to hit the skin strongly. On the other hand, since the flap elastic member 8 does not overlap the acetate fiber assembly 9 at both ends of the flap elastic member 8 in the front-rear direction y, the contractile force of the flap elastic member 8 is inhibited at both ends in the front-rear direction y. not. As a result, the rising flap 6 tends to rise higher toward the wearer's skin, thereby enhancing the effect of preventing side leakage of urine and the like. The flap elastic member 8 preferably extends forward from the front end of the acetate fiber assembly 9 by 10 mm or more, more preferably 20 mm or more, and still more preferably 30 mm or more, and extends from the rear end of the acetate fiber assembly 9. Also preferably extends rearward by 10 mm or more, more preferably 20 mm or more, and even more preferably 30 mm or more.

Note that the positional relationship in the longitudinal direction y between the flap elastic member 8 and the acetate fiber assembly 9 is measured in a state in which the flap elastic member 8 does not develop contractile force by, for example, cutting the flap elastic member 8 into small pieces. Similarly, measurements of various lengths and positions in the present invention shall be performed in such a manner that the elastic member arranged in the absorbent article 1 is finely cut so that the contractile force of the elastic member does not develop.

The acetate fiber assembly 9 may be provided at least in the narrowest portion of the intermediate portion 4B with respect to the front-rear direction y, but the acetate fiber assembly 9 is provided with a length of 50 mm or more in the front-rear direction y. is preferred, 80 mm or more is more preferred, and 100 mm or more is even more preferred. As a result, the rising flap 6 can be softly brought into contact with the wearer's skin in a wider range of the wearer's crotch region. The upper limit of the length of the acetate fiber assembly 9 in the front-rear direction y is, for example, preferably 300 mm or less, more preferably 250 mm or less, and even more preferably 200 mm or less. The width of the acetate fiber assembly 9 is, for example, preferably 3 mm or more, more preferably 5 mm or more, still more preferably 8 mm or more, and preferably 30 mm or less, more preferably 25 mm or less, and even more preferably 20 mm or less.

Acetate fiber assembly 9 is not provided in the widest part of front side part 4A of absorbent body 4 and in front of it and in the widest part of rear side part 4C and behind it in the front-rear direction y. is preferred. As a result, the air permeability of the rising flap 6 is enhanced in the portion not overlapping with the acetate fiber assembly 9, and the stuffiness of the abdomen and buttocks of the wearer of the absorbent article 1 can be suppressed. When the widest portion of the front side portion 4A of the absorbent body 4 is formed with a certain length in the front-rear direction y, the front end of the acetate fiber assembly 9 is positioned on the front side in the front-rear direction y. It is preferably behind the rearmost position of the widest portion of the portion 4A. When the widest portion of the rear side portion 4C of the absorbent body 4 is formed with a certain length in the front-rear direction y, the rear end of the acetate fiber assembly 9 is positioned rearward in the front-rear direction y. It is preferably forward of the frontmost position of the widest portion of the side portion 4C.

As the acetate fiber, two types of cellulose diacetate fiber and cellulose triacetate fiber are widely used, but it is preferable to use the diacetate fiber as the acetate fiber. Cellulose diacetate has an average of 2.22 or more and less than 2.76 hydroxyl groups among the three hydroxyl groups contained in the repeating units of cellulose anhydroglucose that are acetylated, that is, the degree of esterification is 2. 0.22 or more and less than 2.76.

The acetate fiber assembly 9 is preferably formed from long fibers oriented in the front-rear direction y. Specifically, it is preferable that the acetate fibers constituting the acetate fiber assembly 9 are composed of long fibers and the long fibers are oriented in the front-rear direction y. As a result, when gathers are formed in the rising flap 6 by the contractile force of the flap elastic member 8, the acetate fibers are bent or folded in the front-rear direction y, and the bulk of the acetate fiber assembly 9 increases. It is possible to improve the cushioning property.

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

Although the fineness of the acetate fiber is not particularly limited, it is preferably 0.1 dtex to 10 dtex from the viewpoint of having sufficient strength for use.

The acetate fiber assembly 9 may contain acetate fibers as a main component, and may contain fibers other than acetate fibers. The acetate fiber aggregate 9 preferably contains 50% by mass or more of acetate fibers, more preferably 70% by mass or more, even more preferably 80% by mass or more, and even more preferably 90% by mass or more. It is particularly preferable that the acetate fiber assembly 9 is composed only of acetate fibers as a fiber component. On the other hand, the flap forming sheet 7 preferably does not contain acetate fibers.

The acetate fiber assembly 9 is preferably provided closer to the free end 11 than the base 10 of the rising flap 6 . For example, as shown in FIGS. 1 and 2, if the riser flap 6 is not folded back between the base 10 and the free end 11, the acetate fiber assembly 9 is spaced from the base 10 of the riser flap 6. preferably located closer to the free end 11 than to the base 10 . The flap elastic member 8 is likewise spaced apart from the base 10 of the riser flap 6 and preferably closer to the free end 11 than to the base 10 . 3 and 4 to be described later, when the rising flap 6 is folded back along a folding line 12 extending in the front-rear direction y between the base portion 10 and the free end 11, the folding line 12 A flap elastic member 8 and an acetate fiber assembly 9 are preferably provided at the flap tip portion 13 between the free ends 11 . This makes it easier for the rising flap 6 to rise higher toward the wearer's skin.

The acetate fiber assembly 9 may be provided alongside the flap elastic member 8 or may be provided so as to surround the flap elastic member 8 when viewed in cross section in the width direction x. Note that the flap elastic member 8 is preferably attached to the flap forming sheet 7 in order to allow the flap elastic member 8 to stand up higher due to the shrinkage force of the flap elastic member 8 . As a result, the contractile force of the flap elastic member 8 is directly transmitted to the flap forming sheet 7, and the uprighting of the rising flap 6 is facilitated. Specifically, as shown in FIG. 2, the flap elastic member 8 is attached to one portion 7A of the flap forming sheet 7, and the acetate fiber assembly 9 is placed between the flap elastic member 8 and the other portion 7B of the flap forming sheet 7. is preferably provided. In this case, the side of the flap forming sheet 7 to which the flap elastic member 8 is attached across the free end 11 is the one portion 7A. The base portion 10 of the rising flap 6 may be provided on the one portion 7A of the flap forming sheet 7, may be provided on the other portion 7B, or may be provided on both. In FIG. 2, a base portion 10 is formed on one portion 7A of the flap forming sheet 7. As shown in FIG.

The flap elastic member 8 is preferably attached to the flap forming sheet 7 with an adhesive. As the adhesive, a hot-melt adhesive is preferably used, and a rubber-based hot-melt adhesive is more preferably used. It is preferable that the flap elastic member 8 is not attached to the other portion 7B sandwiching the free end 11 of the flap forming sheet 7 at the portion overlapping the acetate fiber assembly 9 .

The acetate fiber assembly 9 is preferably adhered to the other portion 7B of the flap forming sheet 7 with the free end 11 interposed therebetween. Specifically, the acetate fiber assembly 9 is preferably adhered to the other portion 7B of the flap forming sheet 7 in the adhesion region provided on the other portion 7B of the flap forming sheet 7 . As a result, the acetate fiber assembly 9 can be firmly fixed at a predetermined position on the flap forming sheet 7 even if the gathers of the rising flap 6 expand and contract in the front-rear direction y due to the expansion and contraction of the flap elastic member 8 . It is preferable that the bonding region where the acetate fiber assembly 9 is bonded to the other portion 7B of the flap forming sheet 7 has a predetermined width and is provided continuously or intermittently in the front-rear direction y. The width of the adhesive region is preferably 3 mm or more, more preferably 5 mm or more, still more preferably 8 mm or more, and preferably 30 mm or less, more preferably 25 mm or less, and even more preferably 20 mm or less. When the adhesive region is intermittently provided in the front-rear direction y, the length of the intermittent portion in the front-rear direction y is preferably 50 mm or less, more preferably 30 mm or less, and even more preferably 20 mm or less. Also, the adhesive region preferably exists at least within 30 mm rearward from the front end of the acetate fiber assembly 9, more preferably within 20 mm, even more preferably within 10 mm, and forward from the rear end of the acetate fiber assembly 9. It is preferably within 30 mm, more preferably within 20 mm, even more preferably within 10 mm.

It is preferable that the acetate fiber assembly 9 is not adhered to the one portion 7A sandwiching the free end 11 of the flap forming sheet 7, or is adhered to the one portion 7A only in a limited portion. In the latter case, the acetate fiber assembly 9 is adhered to the one portion 7A of the flap forming sheet 7 by the adhesive applied to the flap elastic member 8, and the other portion is not adhered to the one portion 7A of the flap forming sheet 7. It is preferable that As a result, the contractile force of the flap elastic member 8 is easily transmitted to the flap forming sheet 7 at the one portion 7A sandwiching the free end 11 of the flap forming sheet 7, and the flap elastic member 8 overlaps the acetate fiber assembly 9 at the portion 7A. , the contractile force of the flap elastic member 8 is less likely to be hindered by the acetate fiber assembly 9 .

Either the one portion 7A or the other portion 7B of the rising flap 6 sandwiching the free end 11 of the flap forming sheet 7 may face the skin side of the absorbent article 1 . Preferably, the rising flap 6 is formed so that the other portion 7B of the flap forming sheet 7 having a higher cushioning property comes into contact with the wearer's skin when the rising flap 6 rises. That is, the rising flap 6 is preferably formed so that the other portion 7B sandwiching the free end 11 of the flap forming sheet 7 is in contact with the wearer's skin.

In the absorbent article 1A shown in FIGS. 1 and 2, the rise flap 6 is not folded back between the base portion 10 and the free end 11, but in this case, the one portion 7A of the flap forming sheet 7 is preferably located on the skin surface side of the rising flap 6 in the fallen state. In the absorbent article 1A, the higher the raised flap 6 stands, the easier it is for the inner surface of the raised flap 6 in the width direction x to come into contact with the wearer's skin. Therefore, the one portion 7A of the flap forming sheet 7 to which the flap elastic member 8 is attached is positioned on the skin surface side of the rising flap 6 in the fallen state of the rising flap 6, so that when the rising flap 6 is raised, the flap is formed. The one portion 7A of the sheet 7 is easily positioned on the outer side surface in the width direction x, and the flap elastic member 8 is easily brought into contact with the wearer's skin via the acetate fiber assembly 9 . In addition, when the contractile force of the flap elastic member 8 is not so strong, the degree of standing up of the rising flap 6 is suppressed, and when the outer surface of the rising flap 6 in the standing state in the width direction x comes into contact with the wearer's skin easily. There is also In such a case, the other portion 7B of the flap forming sheet 7 may be positioned on the skin surface side of the rising flap 6 when the rising flap 6 is laid down.

FIGS. 3 and 4 show a configuration example of a light incontinence pad as another example of the absorbent article of the present invention. 3 is a plan view of the absorbent article (light incontinence pad) viewed from the skin side, and FIG. 4 is a cross-sectional view of the absorbent article shown in FIG. 3 taken along line IV-IV. In the absorbent article shown in FIGS. 3 and 4, the same constituent members as those of the absorbent article shown in FIGS. 1 and 2 are indicated using the same reference numerals, and the details of these members are described above. is referenced.

The absorbent article 1 (1B) has a top sheet 2, a back sheet 3, and an absorbent body 4 provided therebetween, with a mount 5 further provided between the back sheet 3 and the absorbent body 4. . The mount 5 can improve the shape retention of the absorbent article 1B. The mount 5 can be made of crepe paper or non-woven fabric. Mounting paper 5 may not be provided.

In the absorbent article 1B, the rising flap 6 is folded back along the folding line 12 extending in the front-rear direction y between the base portion 10 and the free end 11, and is the portion between the folding line 12 and the free end 11. A flap elastic member 8 and an acetate fiber assembly 9 are provided at the flap distal end portion 13 . In the absorbent article 1B thus formed, the flap elastic member 8 is attached to the one portion 7A sandwiching the free end 11 of the flap forming sheet 7, and the other portion 7B of the flap forming sheet 7 is positioned so that the rising flap 6 falls down. It is preferably positioned on the skin surface side of the flap distal end portion 13 in a state, ie, a state in which the rising flap 6 is folded. As a result, when the rising flap 6 is raised, the flap elastic member 8 easily comes into contact with the wearer's skin via the acetate fiber assembly 9, thereby enhancing the cushioning properties against the wearer's skin. In the absorbent article 1B, the base portion 10 is formed on the other portion 7B of the flap forming sheet 7. As shown in FIG.

In the absorbent article 1B, the acetate fiber assembly 9 is preferably not provided in the flap rising portion 14 between the base portion 10 of the rising flap 6 and the folding line 12 . This makes it easier for the rising flap 6 to rise toward the wearer's skin. Also, the rising flap 6 can be folded thinly before the absorbent article 1B is used. On the other hand, the flap elastic member 8 may be provided on the flap standing portion 14 .

3 and 4, the folding line 12 of the rising flap 6 is formed at the outer edge of the flap leading edge 13 in the width direction x, but the folding line 12 of the rising flap 6 extends across the width of the flap leading edge 13. It may be formed at the inner end in the direction x. In this case, the free end 11 of the rising flap 6 is located at the outer end of the flap leading end 13 in the width direction x.

The absorbent article of the present invention has been described above with reference to the drawings, but the absorbent article of the present invention is not limited to urine pads and light incontinence pads as shown in the drawings, but may be disposable diapers or sanitary napkins. may

When the absorbent article is a disposable diaper, the disposable diaper is composed of, for example, a front belly portion, a back portion, and a crotch portion provided therebetween and provided with an absorbent body. The front abdomen corresponds to the part that is brought into contact with the abdomen of the wearer when wearing the disposable diaper, and the back part corresponds to the part of the wearer that is brought into contact with the back of the wearer when wearing the disposable diaper. The crotch portion is positioned between the front abdomen and the rear portion and corresponds to the part that is applied to the wearer's crotch.

The disposable diaper may be a tape-type disposable diaper or a pants-type disposable diaper. Tape-type disposable diapers are configured, for example, by providing fastening members at both ends in the width direction of the back portion, and by fastening the fastening members to the front abdomen, the diaper is formed into a pants shape when worn. can be done. A pants-type disposable diaper has a pants-like shape with a waist opening and a pair of leg openings, and is formed in a pants-like shape before being worn.

When the absorbent article is a disposable diaper, the disposable diaper has, for example, a layered body in which an absorbent body is arranged between a top sheet and a back sheet, and includes a front abdomen portion, a back portion, and a crotch portion located therebetween. is formed to have The disposable diaper is also constructed by providing an absorbent main body in which an absorbent body is disposed between the top sheet and the back sheet at the crotch portion of an exterior member having a front abdomen portion, a rear portion, and a crotch portion positioned therebetween. You can also In the latter case, a pants-type disposable diaper can be obtained by forming the exterior member in the shape of pants. In either case, the absorbent article of the present invention can be obtained by providing the rise flaps on the skin side (for example, the top sheet) of the absorbent article and forming the rise flaps with the absorber as described above. can.

1, 1A, 1B: Absorbent article 2: Top sheet 3: Back sheet 4: Absorber 6: Standing flap 7: Flap forming sheet 7A: One part 7B: Other part 8: Flap elastic member 9: Acetate fiber assembly Body 10: Base 11: Free end 12: Fold line

Claims (8)

An absorbent article comprising an absorbent body, a top sheet provided on the skin side of the absorbent body, and a back sheet provided on the non-skin side of the absorbent body,
The absorbent body has a front side portion, a rear side portion, and an intermediate portion therebetween, the front side portion and the rear side portion being wider than the intermediate portion,
A rising flap is provided on the skin surface side of the absorbent article,
The rising flap has a base serving as a starting point for rising and a free end serving as a leading edge of the rising, and is formed by folding back a flap-forming sheet at the free ends,
A flap elastic member extending in the front-rear direction and an acetate fiber aggregate are provided between one portion and the other portion of the folded flap forming sheet sandwiching the free end,
The acetate fiber assembly is provided at least in the narrowest portion of the intermediate portion in the front-rear direction,
The flap elastic member extends further forward than the front end of the acetate fiber assembly and further rearward than the rear end ,
the flap elastic member is attached to the one portion of the flap forming sheet with an adhesive;
The acetate fiber assembly is provided between the flap elastic member and the other portion of the flap forming sheet,
The acetate fiber assembly is adhered to the other portion of the flap forming sheet in an adhesive region provided on the other portion of the flap forming sheet, and the one portion of the flap forming sheet is coated with an adhesive applied to the flap elastic member. an absorbent article , wherein the other portion is not adhered to the one portion of the flap forming sheet . An absorbent article comprising an absorbent body, a top sheet provided on the skin side of the absorbent body, and a back sheet provided on the non-skin side of the absorbent body,
The absorbent body has a front side portion, a rear side portion, and an intermediate portion therebetween, the front side portion and the rear side portion being wider than the intermediate portion,
A rising flap is provided on the skin surface side of the absorbent article,
The rising flap has a base serving as a starting point for rising and a free end serving as a leading edge of the rising, and is formed by folding back a flap-forming sheet at the free ends,
A flap elastic member extending in the front-rear direction and an acetate fiber aggregate are provided between one portion and the other portion of the folded flap forming sheet sandwiching the free end,
The acetate fiber assembly is provided at least in the narrowest portion of the intermediate portion in the front-rear direction,
The flap elastic member extends further forward than the front end of the acetate fiber assembly and further rearward than the rear end ,
The flap elastic member is attached to the one portion of the flap forming sheet,
The acetate fiber assembly is provided between the flap elastic member and the other portion of the flap forming sheet,
The absorbent article, wherein the acetate fiber assembly is adhered to the other portion of the flap forming sheet and is not adhered to the one portion of the flap forming sheet . 3. The absorbent article according to claim 1, wherein said acetate fiber assembly is provided with a length of 50 mm or more in the front-rear direction. The rising flap is folded back along a folding line extending in the front-rear direction between the base and the free end,
The flap elastic member and the acetate fiber assembly are provided at a tip of the flap between the folding line and the free end,
4. The absorbent article according to any one of claims 1 to 3 , wherein the other portion of the flap-forming sheet is positioned on the skin surface side of the leading edge of the flap when the rising flap is laid down. 5. The absorbent article according to claim 4 , wherein said acetate fiber assembly is not provided between said base portion of said rising flap and said folding line. said riser flap is unfolded between said base and said free end,
4. The absorbent article according to any one of claims 1 to 3 , wherein said one portion of said flap-forming sheet is positioned on the skin surface side of said rising flap when said rising flap is laid down. 7. The absorbent article according to claim 6 , wherein said acetate fiber assembly is provided apart from said base of said rising flap and provided closer to said free end than said base. The absorbent article according to any one of Claims 1 to 7 , wherein the acetate fiber assembly is formed from long fibers oriented in the front-rear direction.

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