JP3245096U - absorbent articles - Google Patents

Abstract

An object of the present invention is to provide an absorbent article that has good fit and is easy to wear. [Solution] An absorbent article 1 in which an absorbent body 4 is disposed between a top sheet 2 and a back sheet 3, wherein the top sheet 2 and the back sheet 3 are arranged on the front and rear sides of the front edge of the absorbent body 4. A margin part 7 is formed at the front and rear ends of the absorbent article 1, where the absorbent body 4 does not exist, and which extends backward from the edge.Rising flaps 8 are provided on both sides of the top sheet 2 in the width direction. The flap 8 has a front end 8F, a rear end 8R, and a middle part 8M between these parts, and a flap elastic member 9 is provided in the middle part 8M, and the front end 8F and/or the rear of the rising flap 8 are provided with a flap elastic member 9. The side end portion 8R is arranged to overlap the absorbent core 4 and the margin portion 7, and the length of the portion overlapping with the absorbent core 4 in the front-back direction is shorter than the length of the portion overlapping with the margin portion 7 in the front-back direction. [Selection diagram] Figure 1

Description

The present invention relates to absorbent articles such as urine pads and disposable diapers.

BACKGROUND ART Conventionally, absorbent articles are known in which a rising flap is provided on the skin side in order to prevent side leakage of urine and the like (for example, Patent Documents 1 and 2). The rising flap is usually provided with an elastic member (flap elastic member), so that when the absorbent article is worn, the rising flap stands up due to the contractile force of the flap elastic member, thereby preventing side leakage of urine, etc. be able to.

Japanese Patent Application Publication No. 2010-094321 Japanese Patent Application Publication No. 2019-010446

Absorbent articles equipped with a stand-up flap can prevent side leakage of urine, etc., but from the perspective of leakage prevention, the absorbent article should be worn with a good fit in the wearer's crotch area. desired. Thereby, leakage from the front and rear directions of the absorbent article can also be effectively prevented. The present invention has been made in view of the above circumstances, and its purpose is to provide an absorbent article that is easy to wear and has a good fit.

The absorbent article of the present invention that can solve the above problems is as follows.
[1] An absorbent article having a front-back direction and a width direction, and having a top sheet, a back sheet, and an absorbent body disposed between them,
The top sheet and the back sheet extend forward of the front edge of the absorbent article and backward of the rear edge of the absorbent article, and a margin portion where the absorbent body does not exist is formed at the front and rear ends of the absorbent article. and
rising flaps are provided on both sides of the top sheet in the width direction;
The rising flap has a front end, a rear end, and an intermediate part between these, and at least the intermediate part is provided with a flap elastic member extending in the front-rear direction, and the front end and the rear end is joined to the top sheet, so that the intermediate portion is formed to be able to stand up;
An absorbent article characterized in that the front end and the rear end of the rising flap are joined to the top sheet so as to satisfy the following requirement A and/or the following requirement B.
(Requirement A)
The front end of the rising flap is arranged to overlap the absorbent body and the margin portion, and the length of the portion overlapping with the absorbent body in the front-back direction is shorter than the length of the portion overlapping with the margin portion in the front-back direction. .
(Requirement B)
The rear end portion of the rising flap is arranged to overlap the absorbent body and the margin portion, and the length of the portion overlapping with the absorbent body in the front-back direction is longer than the length of the portion overlapping with the margin portion in the front-back direction. short.
[2] The front end portion of the rising flap is arranged to overlap the absorbent body and the margin portion, and the length of the portion overlapping with the absorbent body in the front-rear direction is equal to the length of the portion overlapping with the margin portion in the front-rear direction. shorter than the
The rear end portion of the rising flap is arranged to overlap the absorbent body and the margin portion, and the length of the portion overlapping with the absorbent body in the front-back direction is the same as the length of the portion overlapping with the margin portion in the front-back direction. or longer. The absorbent article according to [1].
[3] The absorbent according to [1] or [2], when the absorbent body is divided into a front half and a rear half along the center line in the front-rear direction, the area of the front half is smaller than the area of the rear half. Sex items.
[4] The rising flap is configured by attaching the flap elastic member to a flap forming sheet,
The front end of the portion where the flap elastic member is joined to the flap forming sheet is located rearward than the rear end of the front end of the rising flap, and/or
The absorbent according to any one of [1] to [3], wherein the rear end of the portion where the flap elastic member is joined to the flap forming sheet is located forward of the front end of the rear end of the rising flap. Goods.
[5] The absorbent article according to any one of [1] to [4], wherein an intermediate sheet is provided between the top sheet and the absorbent body.
[6] The absorbent article according to [5], wherein the intermediate sheet is configured by disposing a water absorbent resin between a plurality of sheets.
[7] The absorbent body has an upper absorbent layer and a lower absorbent layer,
The front end of the rising flap satisfies the above requirement A and the following requirement C, and/or the rear end of the rising flap satisfies the above requirement B and the following: The absorbent article according to any one of [1] to [6], which is provided to satisfy requirement D.
(Requirement C)
The front end of the rising flap is arranged so as to overlap the upper absorbent core and not overlap the lower absorbent core,
The length in the front-rear direction between the rear end of the front end of the rising flap and the front end of the upper absorbent core is the length between the rear end of the front end of the rising flap and the front end of the lower absorbent core. shorter than the length in the front-to-back direction.
(Requirement D)
The rear end of the rising flap is arranged so as to overlap the upper absorbent core and not overlap the lower absorbent core,
The length in the front-rear direction between the front end of the rear end of the rising flap and the rear end of the upper absorbent body is the length between the front end of the rear end of the rising flap and the rear end of the lower absorbent body. shorter than the length in the front-to-back direction.

In the absorbent article of the present invention, the riser flap is joined to the top sheet so as to satisfy the above requirements A and/or B, so that the front side and/or rear side of the absorbent article faces the skin side. It becomes easier to stand up. Therefore, when wearing the absorbent article, it becomes easy to fit the absorbent article along the wearer's abdomen and buttocks with good fit.

1 represents an example of an absorbent article of the present invention, and represents a plan view of the absorbent article viewed from the skin side. FIG. 4 represents another example of the absorbent article of the present invention, and is a plan view of the absorbent article viewed from the skin side. 3 is a sectional view taken along line III-III of the absorbent article shown in FIGS. 1 and 2. FIG. 2 shows an enlarged plan view of the front side of the absorbent article shown in FIG. 1. FIG. 2 shows an enlarged plan view of the rear side of the absorbent article shown in FIG. 1. FIG. A photograph showing the front side of the absorbent article with the absorbent article unfolded in its natural state.

The absorbent article of the present invention will be explained with reference to the drawings. Note that the present invention is not limited to the embodiments shown in the drawings. FIGS. 1 to 3 show an example of the structure of a urine pad as an example of the absorbent article of the present invention. 1 and 2 are plan views of an absorbent article (urine pad) viewed from the skin side, FIG. 1 is a plan view of the absorbent article according to the first embodiment, and FIG. 2 is a plan view of the absorbent article according to the second embodiment. FIG. FIG. 3 represents a sectional view taken along III-III of the absorbent article shown in FIGS. 1 and 2. In the figures of this application, arrow x represents the width direction, arrow y represents the front-rear direction, and the direction perpendicular to the plane formed by arrows x and y represents the thickness direction z. In FIGS. 1 and 2, 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 has a top sheet 2, a back sheet 3, and an absorbent core 4 provided between them. The top sheet 2 is a sheet that is disposed on the skin side of the absorbent body 4 and is located on the wearer's side when the absorbent article 1 is worn. The back sheet 3 is a sheet that is disposed on the outer surface side of the absorbent body 4 and is located on the opposite side of the wearer when the absorbent article 1 is worn. Urine etc. excreted by the wearer pass through the top sheet 2 and are accommodated in the absorbent body 4. The back sheet 3 prevents 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 corresponds to the direction extending in the front-back direction of the wearer's crotch when the absorbent article 1 is worn. The width direction x means a direction that is on the same plane as the absorbent article 1 and perpendicular to the front-back direction y, and corresponds to the left-right direction of the wearer when wearing the absorbent article 1. In addition, the skin side means the side facing the wearer's skin when the absorbent article 1 is worn, and the outer side means the side facing away from the wearer when the absorbent article 1 is worn. means.

The top sheet 2 is disposed on the skin side of the absorbent body 4 and is provided so as to face the wearer's skin when the absorbent article 1 is worn. The top sheet 2 is preferably liquid permeable. The top sheet 2 may be, for example, a nonwoven fabric made of hydrophilic fibers such as cellulose, rayon, or cotton; or a hydrophobic fabric such as polyolefin (eg, polypropylene, polyethylene), polyester (eg, PET), polyamide (eg, nylon) A nonwoven fabric made of hydrophobic fibers, the surfaces of which are made hydrophilic with a surfactant, can be used. Further, as the top sheet 2, a woven fabric, a knitted fabric, a perforated plastic film, etc. may be used.

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

As the nonwoven fabric constituting each sheet member described above, spunbond nonwoven fabric, point bonded nonwoven fabric, air-through nonwoven fabric, melt blown nonwoven fabric, airlaid nonwoven fabric, spunlace nonwoven fabric, tow-spread nonwoven fabric, SMS nonwoven fabric, etc. can be used. The mass per unit area of each of these sheets is preferably 8 g/m ² or more, more preferably 10 g/m ² or more, and preferably 40 g/m ² or less, and more preferably 30 g/m ² or less.

The absorbent body 4 is not particularly limited as long as it contains an absorbent material that can absorb excrement such as urine. As the absorbent body 4, for example, a molded body made of an absorbent material molded into a predetermined shape can be used, and the molded body may be a paper sheet (for example, tissue paper or thin paper) or a covering sheet such as a liquid-permeable nonwoven fabric. May be covered. Examples of the absorbent material include hydrophilic fibers such as pulp fibers, water absorbent resins such as polyacrylic acid-based, polyaspartic acid-based, cellulose-based, starch-acrylonitrile-based, and the like. The water-absorbing 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 treated with a surfactant or the like to make them hydrophilic in order to increase their affinity with urine and the like.

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

The absorbent body 4 may be composed of multiple layers. In the absorbent article 1 shown in the drawings, the absorbent core 4 is composed of an upper absorbent core 5 and a lower absorbent core 6. In the absorbent core 4 composed of an upper absorbent core 5 and a lower absorbent core 6, it is preferable that the upper absorbent core 5 is larger than the lower absorbent core 6, that is, formed longer in the longitudinal direction y and the width direction x. If the absorbent body 4 is formed in this way, the absorbent capacity and absorption capacity of the absorbent body 4 can be increased, and the level difference at the outer edge of the absorbent body 4 will not become large, and the skin side of the absorbent body 4 will not be large. By forming the surface relatively flat, the feeling of wearing the absorbent article 1 is improved.

The shape (planar shape) of the absorber 4 is not particularly limited, and examples thereof include a rectangle, an hourglass shape, a battledore shape, and the like. Note that the absorbent body 4 is preferably formed in an hourglass shape from the viewpoint of making it less likely to be distorted even if it is pinched between the wearer's thighs and compressed in the width direction x. That is, it is preferable that the absorbent body 4 has a front side part, a rear side part, and an intermediate part between these in the front-rear direction y, and the intermediate part is formed narrower than the front side part and the rear side part.

The top sheet 2 and the back sheet 3 extend forward of the front edge of the absorbent body 4 and backward of the rear edge of the absorbent article 1, and there is an absorbent-absent part where the absorbent body 4 does not exist at the front and rear ends of the absorbent article 1. It is formed. Note that the absorber-free portions at the front and rear ends of the absorbent article 1 are referred to as margin portions 7. In the margin portion 7, the top sheet 2 and the back sheet 3 are provided to overlap each other, and the top sheet 2 and the back sheet 3 are joined to each other. In the margin portion 7, the top sheet 2 and the back sheet 3 may be directly joined or may be joined via another sheet member. The top sheet 2 and the back sheet 3 extend outward from both side edges of the absorbent body 4 in the width direction x, and absorbent body absent areas are also formed at both ends of the absorbent article 1 in the width direction x. is preferred. It is preferable that the absorbent-absent portion is provided on the entire periphery of the absorbent article 1 . This prevents the absorbent material contained in the absorbent core 4 from leaking to the outside of the absorbent article 1, and prevents urine or the like absorbed by the absorbent core 4 from leaking to the outside of the absorbent article 1.

Rising flaps 8 are provided on both sides of the top sheet 2 in the width direction x. The rising flap 8 prevents urine etc. from leaking sideways. The rising flap 8 is joined to the skin side of the top sheet 2 at a flap joint 11.

The rising flap 8 is provided with a flap elastic member 9 extending in the front-rear direction y, and the contraction force of the flap elastic member 9 promotes the rising of the rising flap 8. As shown in FIG. 3, the rising flap 8 has a base 8A serving as a starting point for rising and a free end 8B serving as a tip of rising, and a flap elastic member 9 is provided between the base 8A and the free end 8B.

The rising flap 8 has a front end 8F, a rear end 8R, and a middle part 8M between these, and a flap elastic member 9 extending in the front-rear direction y is provided at least in the middle part 8M. By joining the rear end portion 8R to the top sheet 2, the middle portion 8M is formed to be able to stand up. In the stand-up flap 8, the part that can be raised is the middle part 8M, the part that cannot be raised in front of the middle part 8M is the front end part 8F, and the part that cannot be raised in front of the middle part 8M is the rear end part 8R. . In the rising flap 8, the front end 8F and the rear end 8R overlap with the middle part 8M in the width direction x.

In a plan view of the absorbent article 1 from the top sheet 2 side, the front end 8F and the rear end 8R are preferably arranged to overlap with the margin part 7. Thereby, the rising flap 8 can be stably joined to the top sheet 2. The front end 8F and the rear end 8R are also preferably arranged to overlap with the absorbent core 4 when the absorbent article 1 is viewed from the top sheet 2 side. Thereby, the front end and the rear end of the intermediate portion 8M of the rising flap 8 are formed at a position overlapping the absorber 4, and the intermediate portion 8M can be stably raised. That is, by forming the front end and the rear end of the intermediate part 8M, which is formed to be able to stand up, to overlap with the absorbent body 4, the front end and the rear end of the intermediate part 8M are stably fixed in position, and the intermediate part 8M is Become more stable and easier to stand up. Therefore, it is preferable that the front end portion 8F and the rear end portion 8R have a portion overlapping with the margin portion 7 and a portion overlapping with the absorbent core 4, and are arranged from the portion overlapping with the margin portion 7 to the portion overlapping with the absorbent core 4. It is preferable.

The rising flap 8 has a front end 8F joined to the top sheet 2 at a front joint 12, and a rear end 8R joined to the top sheet 2 at a rear joint 13. The front joint part 12 and the rear joint part 13 can be formed by a joining means such as an adhesive or welding (thermal welding or ultrasonic welding). The rear end of the front joint portion 12 becomes the rear end of the front end 8F of the rising flap 8, and the front part of the rising flap 8 becomes the front end 8F. The front end of the rear joint part 13 becomes the front end of the rear end 8R of the rising flap 8, and the rear part of the rising flap 8 becomes the rear end 8R.

The rising flap 8 is preferably formed by attaching a flap elastic member 9 to a flap forming sheet 10. The flap forming sheet 10 can be made 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. It is preferable that the flap-forming sheet 10 is moisture permeable, which can reduce stuffiness when the absorbent article 1 is worn. The flap forming sheet 10 may be formed by side sheets provided on both sides of the top sheet 2 in the width direction x. In this case, the side sheet can be formed to extend inward in the width direction x from the flap joint portion 11 and extend outward in the width direction x. As shown in FIG. 3, the flap forming sheet 10 is folded back at the free end 8B, and a flap elastic member 9 is disposed between the flap forming sheets 10 folded back at the free end 8B. It is preferable that it be attached to.

It is preferable that the flap elastic member 9 is attached to the rising flap 8 in a stretched state. As a result, the rising flap 8 is promoted to stand up due to the contractile force of the flap elastic member 9. The number of flap elastic members 9 provided on one rising flap 8 may be one or more. In the absorbent article 1 shown in the drawings, one stand-up flap 8 is provided with two flap elastic members 9.

As the flap elastic member 9, it is possible to use elastic stretchable materials used in ordinary absorbent articles, such as polyurethane thread, polyurethane film, and natural rubber. It is preferable that the flap elastic member 9 is fixed to the flap forming sheet 10 with an adhesive. When the flap elastic member 9 is disposed between the flap forming sheets 10 folded back at the free end 8B, the flap elastic member 9 is placed on one side and/or the other side of the flap forming sheet 10 with the free end 8B sandwiched therebetween. It is preferable to be fixed to, and more preferably to both one side and the other side of the flap forming sheet 10 sandwiching the free end 8B. It is preferable that the flap elastic member 9 is attached with an elongation magnification of 1.2 times or more and 5.0 times or less, and the elongation magnification is more preferably 1.5 times or more, further preferably 1.8 times or more, and 4.0 times or more. It is more preferably 3.5 times or less, and even more preferably 3.5 times or less. The expansion magnification explained here is 1.0 times in the non-expanded state.

The rising flap 8 may be formed to rise inward in the width direction x from the base 8A, or may be formed to rise outward in the width direction x from the base 8A. In the absorbent article 1 shown in the drawings, the stand-up flap 8 is formed like the former, which can enhance the effect of preventing leakage of urine and the like. In this case, it is preferable that the inner surface of the rising flap 8 in the width direction x is joined to the top sheet 2 at the front end 8F and the rear end 8R. It becomes easy to rise suitably toward the inside in the width direction x. On the other hand, when the rising flap 8 is formed to rise outward in the width direction x from the base 8A, the rising flap 8 has a front end 8F and a rear end 8R, and the outer surface side in the width direction x is It is sufficient if it is joined to the top sheet 2.

The front end 8F and the rear end 8R of the rising flap 8 are joined to the top sheet 2 so as to satisfy the following requirements A and/or the following requirements B. In the absorbent article 1 shown in FIG. 1, the rising flap 8 is joined to the top sheet 2 such that the front end 8F satisfies the following requirement A and the rear end 8R satisfies the following requirement B.
(Requirement A) The front end 8F of the rising flap 8 is arranged so as to overlap the absorbent body 4 and the margin part 7, and the length LA1 in the front-rear direction y of the part overlapping with the absorbent body 4 is the front and back of the part overlapping with the margin part 7. It is shorter than the length LA2 in the direction y.
(Requirement B) The rear end portion 8R of the rising flap 8 is arranged so as to overlap the absorbent body 4 and the margin portion 7, and the length LB1 in the front-rear direction y of the portion overlapping with the absorbent body 4 is equal to the length LB1 of the portion overlapping with the margin portion 7. It is shorter than the length LB2 in the front-rear direction y.

In the absorbent article 1, the riser flap 8 is joined to the top sheet 2 so as to satisfy the above requirements A and/or B, so that when the absorbent article 1 is laid out in a flat shape, the absorbent article The front side and/or the back side of 1 can easily stand up significantly toward the skin surface. Therefore, when wearing the absorbent article 1, it becomes easy to fit the absorbent article 1 along the wearer's abdomen and buttocks with good fit.

To explain this in detail, in the absorbent article 1, by satisfying the requirement A, the length LA1 of the portion where the front end 8F of the rising flap 8 overlaps with the absorbent core 4 is formed to be short, and by satisfying the requirement B, The length LB1 of the portion where the rear end portion 8R of the rising flap 8 overlaps with the absorbent body 4 is formed to be short. As a result, compared to the case where requirement A and/or requirement B are not satisfied, the rate at which the contractile force of the flap elastic member 9 acts in the direction of shrinking the absorbent body 4 in the front-rear direction y is reduced, and instead, the absorbent article The ratio of the effect on the margin portion 7 of 1 increases. As a result, the front end and/or rear end of the absorbent article 1 is pulled by the flap elastic member 9, making it easier for the front and/or rear end of the absorbent article 1 to rise toward the skin surface. Become.

Figure 6 shows a comparison of an absorbent article that does not meet the above requirement A (on the left side of the photo) and an absorbent article that meets the above requirement A (on the right side of the photo), unfolded in a natural state and viewed from the front side of the absorbent article. showed that. It can be seen that the front side of the absorbent article 1 that satisfies the above requirement A (right side of the photo) bends more than the absorbent article that does not meet the above requirement A (left side of the photo) and stands up higher.

If the absorbent article 1 is formed in this way, when the absorbent article 1 is applied to the wearer's crotch area when the absorbent article 1 is worn, the front side and/or rear side of the absorbent article 1 The part naturally bends a lot. Therefore, it becomes easy to wear the absorbent article 1 along the wearer's abdomen and buttocks with good fit.

The length LA1 means the longest length in the front-rear direction y that is cut by a straight line extending in the front-rear direction y through the area where the front end 8F of the rising flap 8 and the absorbent core 4 overlap. The length LA2 means the longest length in the front-rear direction y that is cut by a straight line extending in the front-rear direction y through the area where the front end 8F of the rising flap 8 and the margin part 7 overlap. The same applies to length LB1 and length LB2.

When the above requirement A is satisfied, the length LA1 in the front-rear direction y of the portion where the front end 8F of the rising flap 8 overlaps with the absorbent core 4, and the length LA1 in the front-rear direction y of the portion where the front end 8F of the rising flap 8 overlaps with the margin portion 7. As for the length LA2 of y, the value of the ratio LA1/LA2 is preferably 0.9 or less, more preferably 0.8 or less, preferably 0.2 or more, and more preferably 0.3 or more. The length LA1 in the front-rear direction y of the portion where the front end 8F of the rising flap 8 overlaps with the absorbent core 4 is preferably 3 mm or more, more preferably 5 mm or more, and preferably 30 mm or less, and more preferably 25 mm or less.

When the above requirement B is satisfied, the length LB1 in the front-rear direction y of the portion where the rear end 8R of the rising flap 8 overlaps with the absorbent core 4 and the length LB1 of the portion where the rear end 8R of the rising flap 8 overlaps with the margin portion 7. As for the length LB2 in the front-rear direction y, the value of the ratio LB1/LB2 is preferably 0.9 or less, more preferably 0.8 or less, preferably 0.2 or more, and more preferably 0.3 or more. The length LB1 in the front-rear direction y of the portion where the rear end portion 8R of the rising flap 8 overlaps with the absorbent core 4 is preferably 3 mm or more, more preferably 5 mm or more, and preferably 30 mm or less, and more preferably 25 mm or less.

It is preferable that the absorbent article 1 is configured to satisfy the above-mentioned requirement A, that is, the front end 8F of the rising flap 8 is arranged to overlap the absorbent body 4 and the margin part 7, and the absorbent body 4 and It is preferable that the length LA1 of the overlapping portion in the front-rear direction y is shorter than the length LA2 of the overlapping portion with the margin portion 7 in the front-rear direction y. More preferably, as shown in FIG. 2, the front end 8F of the rising flap 8 is configured to satisfy the above requirement A, and the rear end 8R of the rising flap 8 is configured to meet the absorber 4 and the margin portion 7. The length LB1 of the portion overlapping with the absorber 4 in the front-rear direction y is the same as or longer than the length LB2 of the portion overlapping with the margin portion 7 in the front-rear direction y.

By forming the absorbent article 1 in this manner, it becomes easy for a caregiver or the like to make the wearer wear the absorbent article 1. When a caregiver etc. puts an absorbent article on a wearer, with the wearer lying on their back, insert the absorbent article under the wearer's buttocks with the back side first, and then insert the absorbent article under the wearer's buttocks, and then The absorbent article is passed between the wearer's crotch, and the absorbent article is worn by placing the front side of the article against the wearer's abdomen. At this time, by configuring the front end portion 8F of the rising flap 8 to satisfy the above requirement A, the front side portion of the absorbent article 1 is easily bent greatly toward the skin side, and the absorbent article 1 is It becomes easy to wear the front part by placing it along the wearer's abdomen. On the other hand, the rear end portion 8R of the rising flap 8 is formed so that the length LB1 in the front-rear direction y of the portion overlapping with the absorbent body 4 is the same as or longer than the length LB2 in the front-rear direction y of the portion overlapping with the margin portion 7. By doing so, the rear side part of the absorbent body 4 is prevented from bending greatly toward the skin side, and the absorbent article 1 can be inserted under the wearer's buttocks with the rear side part first. becomes easier. In this case, the rising flap 8 is formed so that the length LB1 in the front-rear direction y of the portion where the rear end portion 8R overlaps with the absorbent core 4 is longer than the length LB2 in the front-rear direction y of the portion where the rear end portion 8R overlaps with the margin portion 7. is more preferable.

As described above, the length LB1 of the rear end portion 8R of the rising flap 8 in the front-rear direction y of the portion overlapping with the absorbent body 4 is the same as or greater than the length LB2 of the portion overlapping with the margin portion 7 in the front-rear direction y. When the length is also long, the value of the ratio LB1/LB2 is preferably 1.0 or more, more preferably 1.1 or more, even more preferably 1.2 or more, and preferably 4.0 or less, and 3. It is more preferably 5 or less, and even more preferably 3.0 or less. The length LB1 in the front-rear direction y of the portion where the rear end portion 8R of the rising flap 8 overlaps with the absorbent core 4 is preferably 10 mm or more, more preferably 15 mm or more, and preferably 70 mm or less, more preferably 60 mm or less, and 55 mm. The following are more preferred.

The absorbent body 4 is formed so that the area of the front half is smaller than the area of the rear half when the absorbent body 4 is divided into a front half and a rear half along the center line in the front-rear direction y (the center line extending in the width direction x). may have been done. When the absorbent body 4 is formed in this way, the front half of the absorbent body 4 tends to contract and deform in the front-rear direction y due to the contraction force of the flap elastic member 9, as explained above. If the absorbent article 1 is configured to satisfy the above requirement A, even if the area of the front half of the absorbent core 4 is smaller than the area of the rear half, the contractile force of the flap elastic member 9 Large deformation of the front half of the absorbent body 4 is suppressed, and instead, the front end of the absorbent article 1 is easily pulled by the flap elastic member 9. As a result, the front side of the absorbent article 1 tends to rise toward the skin surface.

When the absorbent core 4 has an upper absorbent core 5 and a lower absorbent core 6, it is preferable that the front end 8F of the rising flap 8 is provided so as to satisfy the above requirement A and the following requirement C. It is preferable that the rear end portion 8R of 8 is provided so as to satisfy the above requirement B and the following requirement D. This will be explained with reference to FIGS. 4 and 5.
(Requirement C)
The front end 8F of the rising flap 8 is arranged so as to overlap the upper absorbent core 5 and not overlap the lower absorbent core 6, and the rear end of the front end 8F of the rising flap 8 and the front end of the upper absorbent core 5 overlap. The length L11 in the front-rear direction y between them is shorter than the length L12 in the front-rear direction y between the rear end of the front end 8F of the rising flap 8 and the front end of the lower absorbent core 6.
(Requirement D)
The rear end 8R of the rising flap 8 is arranged so as to overlap the upper absorbent core 5 and not overlap the lower absorbent core 6, and the front end of the rear end 8R of the rising flap 8 and the rear end of the upper absorbent core 5 The length L13 in the front-rear direction y between the rising flap 8 and the rear end 8R of the rising flap 8 is shorter than the length L14 in the front-rear direction y between the front end of the rear end 8R of the rising flap 8 and the rear end of the lower absorbent core 6.

The rising flap 8 of the absorbent article 1 shown in FIG. 1 is provided to satisfy requirements A to D, and the absorbent article 1 shown in FIG. It is set in. 4 shows an enlarged plan view of the front side of the absorbent article 1 shown in FIG. 1, and FIG. 5 shows an enlarged plan view of the back side of the absorbent article 1 shown in FIG.

If the rising flap 8 is provided to satisfy requirement C and/or requirement D, when the absorbent body 4 is composed of the upper layer absorbent body 5 and the lower layer absorbent body 6, the contraction force of the flap elastic member 9 will absorb the This prevents the front side and/or rear side of the body 4 from contracting and deforming significantly in the front-rear direction y. That is, by providing the rising flap 8 as described above, the contractile force of the flap elastic member 9 becomes difficult to reach the portion of the absorbent body 4 where the upper layer absorbent body 5 is present and the lower layer absorbent body 6 is not present. This prevents the front side and/or rear side of the body 4 from contracting and deforming significantly in the front-rear direction y. Instead, the contractile force of the flap elastic member 9 tends to reach the margin portion 7 of the absorbent article 1, and the front side and/or rear side of the absorbent article 1 tends to rise toward the skin side.

In order to prevent the absorbent body 4 from shrinking and deforming in the front-rear direction y, it is preferable that the absorbent body 4 includes hydrophilic fibers. On the other hand, from the viewpoint of increasing the absorption capacity of the absorbent body 4, it is more preferable that the absorbent body 4 contains a water-absorbing resin in addition to the hydrophilic fibers. When the absorbent body 4 contains a water-absorbing resin, the absorbent body 4 preferably contains 10 parts by mass or more of the water-absorbing resin, more preferably 15 parts by mass or more, and 150 parts by mass or more, based on 100 parts by mass of the hydrophilic fibers. It is preferably at most 130 parts by mass, more preferably at most 130 parts by mass.

The mass per unit area of the absorbent body 4 is, for example, preferably 60 g/m ² or more, more preferably 75 g/m ² or more, even more preferably 80 g/m ² or more, and preferably 1000 g/m ^{2 or less, and 950 g/m 2} or more. m ² or less is more preferable, and 900 g/m ² or less is even more preferable. The mass per unit area of the hydrophilic fibers contained in the absorbent body 4 is preferably 60 g/m ² or more, more preferably 75 g/m ² or more, even more preferably 80 g/m ² or more, and 600 g/m ² or less. It is preferably 550 g/m ² or less, more preferably 500 g/m ² or less. When the absorbent body 4 is composed of multiple layers, it is preferable that the total mass per unit area of the multiple layers of the absorbent body 4 or the hydrophilic fibers contained therein is within such a range.

As shown in FIG. 4, the front end of the portion where the flap elastic member 9 is joined to the flap forming sheet 10 (hereinafter referred to as "joint front end 9FE") is located in the front-rear direction y from the rear end of the front end 8F of the rising flap 8. It is preferable that they be located at a distance from each other. Further, as shown in FIG. 5, the rear end of the portion where the flap elastic member 9 is joined to the flap forming sheet 10 (hereinafter referred to as "joint rear end 9RE") extends from the front end of the rear end 8R of the rising flap 8. Preferably, they are located at separate positions in the front-rear direction y. By attaching the flap elastic member 9 to the flap forming sheet 10 in this manner, the rising flap 8 is stably joined to the top sheet 2. That is, the front end 8F of the rising flap 8 is less likely to be peeled off from the top sheet 2 starting from the rear end of the front end 8F, and the rear end 8R of the rising flap 8 is separated from the rear end 8R. Peeling from the top sheet 2 starting from the front end is less likely to occur. Note that the joining front end 9FE and the joining rear end 9RE of the flap elastic member 9 mean the forwardmost position and the rearmost position of the portion where the flap elastic member 9 is joined to the flap forming sheet 10, respectively. Therefore, the flap elastic member 9 may extend further forward than the front end 9FE of the joint, or may extend rearward than the rear end 9RE of the joint.

It is more preferable that the joining front end 9FE of the flap elastic member 9 is located rearward than the rear end of the front end 8F of the rising flap 8. It is more preferable that the joined rear end 9RE of the flap elastic member 9 is located forward of the front end of the rear end 8R of the rising flap 8. By attaching the flap elastic member 9 to the flap forming sheet 10 in this manner, the contractile force of the rising flaps 8 becomes difficult to reach the absorbent body 4, and the absorbent body 4 is prevented from contracting in the front-rear direction y and being significantly deformed. .

The joint front end 9FE of the flap elastic member 9 is preferably located 3 mm or more rearward from the rear end of the front end 8F of the rising flap 8, more preferably 5 mm or more, even more preferably 10 mm or more, and 50 mm or less rearward. The length is preferably 40 mm or less, and even more preferably 35 mm or less. The joint rear end 9RE of the flap elastic member 9 is preferably located 3 mm or more forward from the front end of the rear end 8R of the rising flap 8, more preferably 5 mm or more, even more preferably 10 mm or more, and 50 mm or less forward. The distance is preferably 40 mm or less, and even more preferably 35 mm or less.

Although not shown in the drawings, the absorbent article 1 may include an intermediate sheet between the top sheet 2 and the absorbent core 4. Examples of the intermediate sheet include a sheet for diffusing urine, etc. that has passed through the top sheet 2 in the plane direction, and a sheet for quickly drawing in urine, etc. that has passed through the top sheet 2, such as a nonwoven fabric or a foam sheet. Can be mentioned. It is preferable that the intermediate sheet extends from a position where it overlaps with the center line of the absorber 4 in the longitudinal direction y to a position where it overlaps with the front end 8F and/or the rear end 8R of the rising flap 8. By providing the intermediate sheet in this manner, the absorbent core 4 becomes more difficult to deform. Therefore, the contractile force of the flap elastic member 9 is more likely to reach the margin portion 7 of the absorbent article 1 than the absorbent body 4, and the front and/or rear portions of the absorbent article 1 rise more toward the skin surface. It becomes easier.

The intermediate sheet may be a sheet-like absorbent body configured by disposing a water-absorbing resin between a plurality of sheets. The sheet used for the sheet-like absorbent body is preferably liquid-permeable, and any sheet material that can be used for the top sheet 2 can be used. Examples of the sheet-like absorbent body include those formed so as to have a water-absorbing resin between nonwoven fabrics and no pulp fibers. The sheet-like absorbent body formed in this way has a water-absorbing resin between the nonwoven fabrics, and therefore can realize a high absorption capacity. Furthermore, since the sheet-like absorbent body does not have pulp fibers between the nonwoven fabrics, it can be formed thin without being bulky.

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 as shown in the drawings, but can also be used as disposable diapers, light incontinence pads, sanitary napkins, etc. There may be.

When the absorbent article is a disposable diaper, the disposable diaper includes, for example, a front abdomen, a rear region, and a crotch region located between these regions and provided with an absorbent body. The front abdomen corresponds to the part that is placed against the wearer's ventral side when wearing the disposable diaper, and the back part corresponds to the part that is placed against the wearer's back side when the disposable diaper is put on. The crotch is located between the front abdomen and the back, and corresponds to the part that touches the wearer's crotch.

The disposable diaper may be a tape type disposable diaper or a pants type disposable diaper. A tape-type disposable diaper, for example, is configured with fastening members provided at both ends in the width direction of the rear part, and by fastening the fastening members to the front abdomen, it can be formed into a pants shape when worn. Can be done. A pants-type disposable diaper has a pants shape having a waist opening and a pair of leg openings, and is formed into a pants shape before being worn.

When the absorbent article is a disposable diaper, the disposable diaper has, for example, a laminate in which an absorbent body is arranged between a top sheet and a back sheet, and a front abdominal region, a rear region, and a crotch region located between these. It is formed to have. The disposable diaper also includes an absorbent body in which an absorbent body is disposed between a top sheet and a back sheet, in the crotch of an exterior member that has a front abdomen, a back, and a crotch located between these. You can also. In the latter case, by forming the exterior member in the shape of pants, a pants-type disposable diaper can be obtained. In either case, the absorbent article of the present invention can be obtained by providing a rising flap on the skin side of the absorbent article and forming the rising flap as described above. In particular, the absorbent article of the present invention can be suitably applied to tape-type disposable diapers and urine pads used in conjunction with disposable diapers (urine pads placed on the skin side of disposable diapers). can.

1: Absorbent article 2: Top sheet 3: Back sheet 4: Absorbent core 5: Upper absorbent core 6: Lower absorbent core 7: Margin section 8: Standing flap, 8F: Front end, 8R: Rear end, 8M : Middle part, 8A: Base, 8B: Free end 9: Flap elastic member, 9FE: Joint front end, 9RE: Joint rear end 10: Flap forming sheet 11: Flap joint 12: Front joint (of rising flap) 13: Posterior joint (of rising flap)

Claims (7)

An absorbent article having a front-back direction and a width direction, and having a top sheet, a back sheet, and an absorbent body disposed between them,
The top sheet and the back sheet extend forward of the front edge of the absorbent article and backward of the rear edge of the absorbent article, and a margin portion where the absorbent body does not exist is formed at the front and rear ends of the absorbent article. and
rising flaps are provided on both sides of the top sheet in the width direction;
The rising flap has a front end, a rear end, and an intermediate part between these, and at least the intermediate part is provided with a flap elastic member extending in the front-rear direction, and the front end and the rear end is joined to the top sheet, so that the intermediate portion is formed to be able to stand up;
An absorbent article characterized in that the front end and the rear end of the rising flap are joined to the top sheet so as to satisfy the following requirement A and/or the following requirement B.
(Requirement A)
The front end of the rising flap is arranged to overlap the absorbent body and the margin portion, and the length of the portion overlapping with the absorbent body in the front-back direction is shorter than the length of the portion overlapping with the margin portion in the front-back direction. .
(Requirement B)
The rear end portion of the rising flap is arranged to overlap the absorbent body and the margin portion, and the length of the portion overlapping with the absorbent body in the front-back direction is longer than the length of the portion overlapping with the margin portion in the front-back direction. short. The front end of the rising flap is arranged to overlap the absorbent body and the margin portion, and the length of the portion overlapping with the absorbent body in the front-back direction is shorter than the length of the portion overlapping with the margin portion in the front-back direction. ,
The rear end portion of the rising flap is arranged to overlap the absorbent body and the margin portion, and the length of the portion overlapping with the absorbent body in the front-back direction is the same as the length of the portion overlapping with the margin portion in the front-back direction. 2. The absorbent article of claim 1, wherein the absorbent article is longer. The absorbent article according to claim 1 or 2, wherein the area of the front half is smaller than the area of the rear half when the absorber is divided into a front half and a rear half along a longitudinal centerline. The rising flap is configured by attaching the flap elastic member to a flap forming sheet,
The front end of the portion where the flap elastic member is joined to the flap forming sheet is located rearward than the rear end of the front end of the rising flap, and/or
The absorbent article according to claim 1 or 2, wherein a rear end of the portion where the flap elastic member is joined to the flap forming sheet is located forward of a front end of the rear end of the rising flap. The absorbent article according to claim 1 or 2, wherein an intermediate sheet is provided between the top sheet and the absorbent body. The absorbent article according to claim 5, wherein the intermediate sheet is configured by disposing a water absorbent resin between a plurality of sheets. The absorbent body has an upper absorbent layer and a lower absorbent layer,
The front end of the rising flap satisfies the above requirement A and the following requirement C, and/or the rear end of the rising flap satisfies the above requirement B and the following: The absorbent article according to claim 1 or 2, which is provided to satisfy requirement D.
(Requirement C)
The front end of the rising flap is arranged so as to overlap the upper absorbent core and not overlap the lower absorbent core,
The length in the front-rear direction between the rear end of the front end of the rising flap and the front end of the upper absorbent core is the length between the rear end of the front end of the rising flap and the front end of the lower absorbent core. shorter than the length in the front-to-back direction.
(Requirement D)
The rear end of the rising flap is arranged so as to overlap the upper absorbent core and not overlap the lower absorbent core,
The length in the front-rear direction between the front end of the rear end of the rising flap and the rear end of the upper absorbent body is the length between the front end of the rear end of the rising flap and the rear end of the lower absorbent body. shorter than the length in the front-to-back direction.

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