JP7169392B2 - absorbent article - Google Patents

Description

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

Conventionally, an absorbent article is known in which a rising flap is provided on the skin surface side in order to prevent lateral leakage of urine or the like. The rising flaps are usually provided with an elastic member, so that when the absorbent article is put on, the rising flaps stand up due to the contractile force of the elastic member, and side leakage of urine or the like can be prevented. For example, Patent Documents 1 to 4 disclose absorbent articles provided with rising flaps of various configurations.

Japanese Patent Application Laid-Open No. 2002-000656 JP 2004-337387 A JP 2012-183134 A JP 2014-090723 A

In order to enhance the effect of preventing leakage of urine or the like by the rising flaps, it is desirable that the rising flaps preferably rise toward the skin of the wearer. necessary. However, in this case, the rise flaps may come into relatively strong contact with the wearer's skin, and as a result, the rise flaps may strongly tighten the wearer's skin or cause discomfort. Conversely, if the contact of the rising flap against the skin is weakened, the rising flap will not stand up properly and side leakage will easily 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 formed to softly touch the skin.

The absorbent article of the present invention that can solve the above-mentioned problems is an absorbent article having a top sheet, a back sheet, and an absorbent body disposed therebetween, and having rising flaps on the skin side. An article; the rising flap has a base portion serving as the starting point of the rising and a free end serving as the leading edge of the rising, and is formed by folding back the flap forming sheet at the free end, and one side of the folded flap forming sheet and the other side, a first flap elastic member, a second flap elastic member, and a third flap elastic member are provided from the free end side; the first flap elastic member, the second flap elastic member, and the third flap elastic member are , a non-adhesive region where one side and the other side of the folded flap forming sheet are adhered to each other, and the one side and the other side of the folded flap forming sheet are not adhered to each other between the first flap elastic member and the second flap elastic member; is formed; the spacing between the first flap elastic member and the second flap elastic member is wider than the spacing between the second flap elastic member and the third flap elastic member; and one side of the folded flap forming sheet The other side is characterized in that they are welded together at a welded portion formed closer to the base than the third flap elastic member.

In the absorbent article of the present invention, the first flap elastic member and the second flap elastic member are provided on the free end side of the rising flap at a wide separation interval, and the first flap elastic member and the second flap elastic member are not adhered to each other. Since the region is formed, the free end side of the rising flap is less likely to come into strong contact with the wearer's skin, and the feeling of wearing is improved. On the other hand, the rising flap is further provided with a third flap elastic member closer to the base side than the second flap elastic member, and the third flap elastic member is provided with a narrow separation distance from the second flap elastic member. Due to the contractile forces of the second flap elastic member and the third flap elastic member, the rising flap can be preferably raised toward the wearer's skin. In addition, since one side and the other side of the folded flap forming sheet are welded to each other at the welded portion on the base side of the third flap elastic member, rigidity is imparted to the rising flap at the welded portion, and the rising flap stands up. Stable and easy to hold in a state. Therefore, in the absorbent article of the present invention, the rising flaps are preferably raised toward the wearer's skin, and the effect of preventing leakage of urine and the like can be enhanced. It can be made into a thing, and it becomes what is excellent in a feeling of wearing.

It is preferable that one side of the folded back flap forming sheet extends from the base to the free end, and the other side of the free end extends halfway from the free end to the base. By forming the rising flaps in this way, the air permeability of the base portion of the rising flaps increases, and the stuffiness accumulated between the rising flaps on the skin side of the absorbent article permeates through the flap forming sheet. Easier to release to the outside. In this case, the length in the width direction of the other side of the folded flap forming sheet is preferably 50% or more and 95% or less of the length in the width direction from the base of the rising flap to the free end.

It is preferable that a plurality of welded portions be arranged side by side in the front-rear direction. If the welded portion is formed in this manner, the contractile force of the second flap elastic member and the third flap elastic member can be favorably transmitted to the rising flap, and the rising flap can be raised easily. In addition, gathers are preferably formed in the rising flaps, and the rising flaps tend to be soft against the wearer's skin. Furthermore, the portion between the welded portions adjacent in the front-rear direction functions as an air passage, and the air permeability of the rising flap can be enhanced.

Preferably, the welded portion is formed by arranging a plurality of welded lines in the front-rear direction, which are arranged at an angle of 30° to 150° with respect to the extending direction of the free end of the rising flap. If the welded portion is formed in this way, the rising flap is imparted with rigidity in the rising direction, and the rising flap can be stably held in the standing state, and the second flap elastic member and the third flap elastic member contraction force is easily transmitted to the rising flap, and the rising flap becomes high and easy to rise. Therefore, the effect of preventing leakage of urine or the like can be enhanced.

The spacing between the first flap elastic member and the second flap elastic member is preferably 1.2 times or more and 5.0 times or less of the spacing between the second flap elastic member and the third flap elastic member. As a result, it is possible to secure a wide separation distance between the first flap elastic member and the second flap elastic member, and to make the rising flap soft against the wearer's skin. Further, the contractile force of the second flap elastic member and the third flap elastic member facilitates raising the rising flap high.

The spacing between the first flap elastic member and the free end is preferably narrower than the spacing between the second flap elastic member and the third flap elastic member. This allows the free end of the rising flap to be lifted higher. In addition, since it is possible to ensure a wide separation distance between the first flap elastic member and the second flap elastic member, the cushioning property of the portion between the first flap elastic member and the second flap elastic member is enhanced, and the rising flap is raised. It is possible to make the contact with the skin of the wearer softer.

It is preferable that the front-rear direction end portions of the rising flaps are adhered to the top sheet by adhesive portions extending in the front-rear direction in stripes. As a result, the non-bonded portions between the bonded portions coated in stripes function as ventilation paths, and the air permeability at the ends of the rising flaps in the front-rear direction can be enhanced.

It is preferable that the non-adhesive region extends to the front and rear ends of the folded flap-forming sheet and forms an air passage extending from the front end to the rear end of the folded flap-forming sheet. As a result, the air permeability of the rising flaps can be enhanced, and dampness on the skin surface side of the absorbent article can be reduced.

In the absorbent article of the present invention, the rising flaps are preferably raised toward the wearer's skin, and the effect of preventing leakage of urine and the like can be enhanced, and the rising flaps are soft against the wearer's skin. It can be said that it is excellent in wearing feeling.

An example of the absorbent article of this invention is shown, and the top view which looked at the absorbent article (urinary pad) from the skin surface side is represented. FIG. 2 shows a II-II cross-sectional view of the absorbent article shown in FIG. 1, showing a state in which the rising flap is raised. Another example of the absorbent article of this invention is shown, and the top view which looked at the absorbent article (urinary pad) from the skin surface side is represented. Another example of the absorbent article of this invention is shown, and the top view which looked at the absorbent article (urinary pad) from the skin surface side is represented.

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 skin side, and FIG. 2 shows a II-II cross-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 has a top sheet 2, a back sheet 3, and an absorbent body 4 provided therebetween. The top sheet 2 is a sheet that is arranged on the skin surface side of the absorbent body 4 and positioned on the wearer's side when the absorbent article 1 is worn. The back sheet 3 is arranged on the outer surface side of the absorbent body 4, and is a sheet located on the side opposite to the wearer when the absorbent article 1 is worn. Urine or the like excreted by the wearer passes through the top sheet 2 and is received 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. In addition, the term "skin side" of the absorbent article means the side facing the skin of the wearer when wearing the absorbent article, and the term "outer side of the absorbent article" means the side facing the wearer's skin when wearing the absorbent article. means the side facing away from.

The topsheet 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 material such as polyolefin (eg, polypropylene, polyethylene), polyester (eg, PET), polyamide (eg, nylon). 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 backsheet 3 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. 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, a spunbond nonwoven fabric, a point-bond nonwoven fabric, an air-through nonwoven fabric, a meltblown nonwoven fabric, an air-laid nonwoven fabric, a spunlaced nonwoven fabric, a tow-spread nonwoven fabric, an 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, more preferably 30 g/m ² or less.

The absorber 4 is not particularly limited as long as it contains an absorbent material capable of absorbing excrement such as urine. As the absorbent body 4, for example, a molded body obtained by molding an absorbent material into a predetermined shape can be used. May be covered. 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 fabric sheets and not contain pulp fibers. Since the sheet-like absorbent body thus formed has a water-absorbing resin between the nonwoven fabric sheets, it can achieve a high absorption capacity, and since it does not have pulp fibers between the nonwoven fabric sheets, it can be formed thin without being bulky. can.

The absorbent body 4 may be composed of multiple layers. For example, the absorbent body 4 may be composed of an upper absorbent body and a lower absorbent body.

The shape (planar shape) of the absorber 4 is not particularly limited, and examples thereof include a rectangular shape, an hourglass shape, and a battledore shape. In addition, it is preferable that the absorbent body 4 is formed in an hourglass shape from the viewpoint of making it difficult to be distorted even if it is sandwiched between the wearer's thighs and pressed in the width direction x. That is, it is preferable that the absorbent body 4 has a front side portion, a rear side portion, and an intermediate portion therebetween in the front-rear direction y, and the intermediate portion is formed narrower than the front side portion and the rear side portion.

A rising flap 5 is provided on the skin side of the absorbent article 1 . By providing the rising flap 5, lateral leakage of urine or the like is prevented. A plurality of flap elastic members 7 extending in the front-rear direction y are provided on the rising flap 5 , and the contractile force of the flap elastic members 7 promotes the rising of the rising flap 5 .

The rising flap 5 has a base portion 5A that serves as a starting point for rising and a free end 5B that serves as a leading end of the rising, and a flap elastic member 7 is provided between the base portion 5A and the free end 5B. 2, the base portion 5A of the rise flap 5 is joined to the top sheet 2, but the base portion 5A of the rise flap 5 is, for example, a bag in which both sides in the width direction x are folded back to the skin surface side of the absorbent body 4. It may be joined to the sheet 3 or both.

The rising flap 5 may be formed to rise inward in the width direction x from the base portion 5A, or may be formed to rise outward in the width direction x from the base portion 5A. In the absorbent article 1 shown in the drawings, the rising flaps 5 are formed in the former manner, thereby enhancing the effect of preventing leakage of urine and the like. In this case, the rising flap 5 is preferably joined to the top sheet 2 on the inner surface side in the width direction x at the end in the front-rear direction y. However, it becomes easier to favorably rise inward in the width direction x from the base portion 5A.

The rising flap 5 is composed of a flap forming sheet 6, and the rising flap 5 is formed by folding back the flap forming sheet 6 at the free end 5B. The flap-forming sheet 6 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 6 is preferably moisture-permeable, which can reduce stuffiness when the absorbent article 1 is worn. The flap forming sheet 6 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 and outward in the width direction x from the joint with the top sheet 2 .

The flap elastic member 7 is arranged between the one side 6A and the other side 6B of the flap forming sheet 6 folded back at the free end 5B. The rising flap 5 is provided with a first flap elastic member 7A, a second flap elastic member 7B, and a third flap elastic member 7C as flap elastic members 7 from the free end 5B side. The interval between the two flap elastic members 7B is formed wider than the interval between the second flap elastic members 7B and the third flap elastic members 7C. Then, the first flap elastic member 7A, the second flap elastic member 7B, and the third flap elastic member 7C are adhered to the one side 6A and the other side 6B of the folded flap forming sheet 6, and the first flap elastic member 7A and the third flap elastic member 7C are adhered to each other. A non-adhesive region is formed between the second flap elastic members 7B so that the one side 6A and the other side 6B of the folded flap forming sheet 6 are not adhered to each other. Further, the one side 6A and the other side 6B of the folded flap forming sheet 6 are welded to each other at the welding portion 8 formed closer to the base portion 5A than the third flap elastic member 7C.

By forming the rising flaps 5 in the absorbent article 1 in this manner, the rising flaps 5 are preferably raised toward the wearer's skin, and the effect of preventing leakage of urine and the like can be enhanced. 5 can be made soft against the wearer's skin, resulting in an excellent wearing feeling. To explain this in detail, the rising flap 5 has a first flap elastic member 7A and a second flap elastic member 7B provided with a wide separation distance on the free end 5B side of the rising flap 5, and one side of the flap forming sheet 6 folded back. The side 6A and the other side 6B are adhered, and between the first flap elastic member 7A and the second flap elastic member 7B, there is a non-adhered area where the one side 6A and the other side 6B of the folded flap forming sheet 6 are not adhered to each other. Because of this formation, the free end 5B side of the rising flap 5 is less likely to come into strong contact with the wearer's skin, improving wearing comfort. For example, when the free end 5B of the rising flap 5 contacts the wearer's skin, the one side 6A and the other side 6B of the flap forming sheet 6 are separated at the portion between the first flap elastic member 7A and the second flap elastic member 7B. As a result, the portion functions like a cushion, and the free end 5B side of the rising flap 5 can be soft against the wearer's skin. On the other hand, the rising flap 5 is further provided with a third flap elastic member 7C closer to the base portion 5A than the second flap elastic member 7B. Since the second flap elastic member 7B and the third flap elastic member 7C are adhered to the one side 6A and the other side 6B of the folded flap forming sheet 6, the second flap elastic member 7B and the third flap elastic member 7C are attached. Due to the contractile force of the member 7C, the rising flap 5 can be preferably raised toward the wearer's skin. In addition, since the one side 6A and the other side 6B of the folded flap forming sheet 6 are welded to each other at the welded portion 8 on the base portion 5A side of the third flap elastic member 7C, the rising flap 5 is formed at the welded portion 8. Rigidity is imparted, the rising flap 5 can stably maintain the standing state, and the leakage prevention effect of urine or the like can be enhanced.

The flap elastic member 7 is preferably attached to the stand-up flap 5 in a stretched state. As a result, the contractile force of the flap elastic member 7 promotes the erection of the rising flap 5 . As the flap elastic member 7, 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. The flap elastic member 7 is fixed to the one side 6A and the other side 6B of the folded flap forming sheet 6 with an adhesive. The flap elastic member 7 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.

The first flap elastic member 7A is preferably arranged near the free end 5B. For example, when the rising flap 5 is divided into 10 equal parts from the base portion 5A toward the free end 5B, the first flap elastic member 7A is arranged in the area of 2/10 of the free end 5B side of the rising flap 5. is preferred, and it is more preferred to be arranged in the area of 1/10. The first flap elastic member 7A is also arranged such that the distance between the first flap elastic member 7A and the free end 5B is narrower than the distance between the first flap elastic member 7A and the second flap elastic member 7B. It is more preferable that the second flap elastic member 7B and the third flap elastic member 7C are arranged so as to be narrower than the space between them. Thereby, the first flap elastic member 7A is arranged in the vicinity of the free end 5B, and the free end 5B of the rising flap 5 can be raised higher. In addition, since a wide separation interval can be secured between the first flap elastic member 7A and the second flap elastic member 7B, the cushioning property of the portion between the first flap elastic member 7A and the second flap elastic member 7B is enhanced. , the contact of the rising flap 5 against the wearer's skin can be made softer.

The distance between the first flap elastic member 7A and the second flap elastic member 7B is preferably 1.2 times or more the distance between the second flap elastic member 7B and the third flap elastic member 7C. More preferably 5 times or more. As a result, it is possible to secure a wide separation distance between the first flap elastic member 7A and the second flap elastic member 7B, and the rising flap 5 can be made soft against the wearer's skin. On the other hand, the second flap elastic member 7B and the third flap elastic member 7C are arranged at a position separated from the base portion 5A to some extent, and the contractile force of the second flap elastic member 7B and the third flap elastic member 7C causes the rising flap 5 to stand up. From the point of view of making it possible, the spacing between the first flap elastic member 7A and the second flap elastic member 7B should be 5.0 times or less of the spacing between the second flap elastic member 7B and the third flap elastic member 7C. Preferably, 4.0 times or less is more preferable.

The third flap elastic member 7C is preferably arranged at a position some distance from the base portion 5A and the free end 5B. For example, when the rising flap 5 is divided into 10 equal parts from the base portion 5A toward the free end 5B, the third flap elastic member 7C is preferably arranged in the central 6/10 region of the rising flap 5. More preferably, it is located in the 4/10 area. As a result, the contractile force of the second flap elastic member 7B and the third flap elastic member 7C enables the rising flap 5 to stand up high.

As the flap elastic member 7, the rising flap 5 may be provided with an elastic member other than the first flap elastic member 7A, the second flap elastic member 7B, and the third flap elastic member 7C, for example, a fourth flap elastic member. (not shown). In this case, the fourth flap elastic member is preferably provided closer to the base portion 5A than the third flap elastic member 7C. Therefore, the rising flap 5 has three sections between the free end 5B and the first flap elastic member 7A, between the first flap elastic member 7A and the second flap elastic member 7B, and between the second flap elastic member 7B and the third flap elastic member 7C. Preferably, no further elastic members are provided between. When a fourth flap elastic member is further provided as the flap elastic member 7, the distance between the third flap elastic member 7C and the fourth flap elastic member is the distance between the first flap elastic member 7A and the second flap elastic member 7B. Narrower than the spacing is preferred. Also, the welded portion 8 is preferably formed closer to the base portion 5A than the fourth flap elastic member. As shown in the drawings, it is particularly preferable that the rising flap 5 is provided with only the first flap elastic member 7A, the second flap elastic member 7B, and the third flap elastic member 7C as the flap elastic members 7. FIG.

One side 6A of the flap forming sheet 6 sandwiching the free end 5B extends from the base portion 5A to the free end 5B. On the other hand, the other side 6B sandwiching the free end 5B of the flap forming sheet 6 may extend from the free end 5B to the base portion 5A, or may extend halfway from the free end 5B to the base portion 5A. In the drawings, the flap-forming sheet 6 is formed in the latter manner. In order to reduce stuffiness on the skin surface side of the absorbent article 1, the other side 6B of the flap forming sheet 6 preferably extends halfway from the free end 5B to the base 5A. That is, it is preferable that the rising flap 5 is composed of a single flap forming sheet 6 on the side of the base portion 5A, and composed of a double flap forming sheet 6 on the side of the free end 5B. As a result, the rising flaps 5 have increased air permeability at the base portion 5A side portion, and the stuffiness accumulated between the rising flaps 5 provided on both sides in the width direction x on the skin surface side of the absorbent article 1 is formed into flaps. It becomes easy to pass through the sheet 6 and be released to the outside.

When the rising flap 5 is formed as described above, the length in the width direction x of the other side 6B of the folded flap forming sheet 6 is the length in the width direction x from the base portion 5A of the rising flap 5 to the free end 5B. It is preferably 50% or more, more preferably 60% or more, of the length (that is, the length in the width direction x of one side 6A of the folded flap forming sheet 6). If the rising flaps 5 are formed in this way, it becomes easier to secure an area for arranging the plurality of flap elastic members 7 between the folded flap forming sheets 6, and the folded flap forming sheets 6 It becomes easy to secure a region for forming the welded portion 8 that welds the one side 6A and the other side 6B. On the other hand, the length in the width direction x of the other side 6B of the folded flap forming sheet 6 is preferably 95% or less of the length in the width direction x from the base portion 5A of the rising flap 5 to the free end 5B, 85% or less is more preferable. This makes it easier to reduce stuffiness on the skin side of the absorbent article 1 . The width direction x length of the one side 6A or the other side 6B of the folded flap forming sheet 6 or the width direction x length from the base 5A of the rising flap 5 to the free end 5B is the length of the rising flap 5 means the length in the width direction x in the fallen state, and is the length in the direction from the base 5A of the rising flap 5 to the free end 5B.

The welded portion 8 is a portion where the one side 6A and the other side 6B of the folded flap forming sheet 6 are welded to each other, and is provided between the flap elastic member 7 and the base portion 5A. The welding part 8 is provided closer to the base part 5</b>A than all the flap elastic members 7 in the rising flap 5 . Therefore, in the rising flap 5, no elastic member is arranged between the welded portion 8 and the base portion 5A. The welded portion 8 can be formed by welding the one side 6A and the other side 6B of the folded flap forming sheet 6 to each other by heat welding, ultrasonic welding, or the like.

It is preferable that the welding part 8 is formed so as to extend in the front-rear direction y, or formed side by side in the front-rear direction y. The welded portion 8 is also preferably formed over a wide range in the front-rear direction y of the flap forming sheet 6 . For example, when the relative position of the flap forming sheet 6 in the front-rear direction y is set to 0% at the front end of the flap forming sheet 6 and 100% at the rear end, the front end of the welded portion 8 (a plurality of welded portions 8 are formed) In this case, the frontmost edge of the plurality of welded portions 8 is preferably in the range of 0% to 30% of the flap forming sheet 6, and more preferably in the range of 0% to 20%. , more preferably in the range of 0% to 10%. It is preferably in the range of 70% to 100% of the flap forming sheet 6, more preferably in the range of 80% to 100%, and even more preferably in the range of 90% to 100%.

In the absorbent article 1 shown in FIG. 1, a plurality of welded portions 8 are formed side by side in the front-rear direction y. In FIG. 1, each welded portion 8 is formed in a straight line extending in the front-rear direction y. By forming the welded portion 8 in this manner, the contractile force of the second flap elastic member 7B and the third flap elastic member 7C is easily transmitted to the rising flap 5, and the rising flap 5 is easily raised to a high height. In addition, gathers are preferably formed in the rising flaps 5, and the rising flaps 5 can be easily brought into contact with the wearer's skin softly. Furthermore, the portion between the welded portions 8 adjacent in the front-rear direction y functions as an air passage, and the air permeability of the rising flap 5 can be enhanced. When a plurality of welded portions 8 are formed side by side in the front-rear direction y in this way, the distance between adjacent welded portions 8 in the front-rear direction y is preferably 20 mm or less, more preferably 15 mm or less, and 10 mm or less. More preferred.

3 and 4 show other structural examples of the absorbent article of the present invention. The absorbent article shown in FIGS. 3 and 4 differs from the absorbent article shown in FIG. 1 in the formation pattern of the welded portions 8 .

In the absorbent article 1 shown in FIG. 3, each rising flap 5 is formed with one welded portion 8 extending in the front-rear direction y. The welded portion 8 is formed over substantially the entire front-rear direction y of the rising flap 5 . In the absorbent article 1 shown in FIG. 3 , the welded portion 8 imparts rigidity to the rising flap 5 in the front-rear direction y, so that the standing state of the rising flap 5 can be stably maintained.

In the absorbent article 1 shown in FIG. 4, as in FIG. 1, a plurality of welded portions 8 are formed side by side in the front-rear direction y. It is formed in a straight line extending at an angle of .degree. to 150.degree. That is, the welding portion 8 is formed by arranging a plurality of welding lines arranged at an angle of 30° to 150° with respect to the extending direction of the free end 5B in the front-rear direction y. The angle is more preferably 40° or more, still more preferably 45° or more, more preferably 140° or less, and even more preferably 135° or less. If the welded portion 8 is formed in this manner, the rising flap 5 is imparted with rigidity in the rising direction, so that the rising flap 5 can be stably held in the standing state, and the second flap elastic member 7B and the second flap elastic member 7B are easily held together. The contractile force of the 3-flap elastic member 7C is favorably transmitted to the rising flap 5, and the rising flap 5 becomes high and easy to rise. Therefore, the leakage prevention effect of urine etc. can be enhanced, and the rise flap 5 can be made soft against the wearer's skin, and the breathability of the rise flap 5 can be improved. The angle of the welding line forming the welding portion 8 with respect to the extending direction of the free end 5B is determined when the welding line extends parallel to the extending direction of the free end 5B (for example, the welding portion 8 of FIG. In the case of a weld line), it is 0°, and when it extends vertically, it is 90°.

The rising flap 5 has a non-adhesive region formed between the first flap elastic member 7A and the second flap elastic member 7B where the one side 6A and the other side 6B of the folded flap forming sheet 6 are not adhered to each other. , The non-adhesive region is preferably formed over the entire front-rear direction y in which the first flap elastic member 7A and the second flap elastic member 7B are provided. Furthermore, the non-adhesive region preferably extends to the front and rear ends of the folded flap forming sheet 6 , thereby allowing the folded flap forming sheet 6 to extend from the front end to the rear end. Preferably, an extending air passage is formed. If the ventilation path is formed inside the rising flap 5 in this manner, the air permeability of the rising flap 5 can be enhanced, and the stuffiness on the skin side of the absorbent article 1 can be reduced.

In the rising flap 5, a non-adhesive region is also formed between the second flap elastic member 7B and the third flap elastic member 7C so that the one side 6A and the other side 6B of the folded flap forming sheet 6 are not adhered to each other. is preferred. In addition, it is preferable that the non-adhesive region is formed over the entirety of the front-rear direction y where the second flap elastic member 7B and the third flap elastic member 7C are provided. It preferably extends to the edge and back edge. Thereby, the air permeability of the rising flap 5 can be further improved.

The rising flap 5 is preferably formed so as to rise straight from the base portion 5A to the second flap elastic member 7B without bending. As a result, the effect of preventing leakage of urine or the like by the rising flap 5 can be enhanced.

It is preferable that an end portion of the rising flap 5 in the front-rear direction y is adhered to the top sheet 2 by an adhesive portion 9 extending in a stripe shape in the front-rear direction y. As a result, the non-adhesive portions between the adhesive portions 9 coated in stripes function as ventilation paths, and the air permeability at the ends of the rising flaps 5 in the front-rear direction y can be enhanced.

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

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 rising flaps on the skin side (for example, the top sheet) of the absorbent article and forming the rising flaps as described above.

1: Absorbent article 2: Top sheet 3: Back sheet 4: Absorbent 5: Standing flap, 5A: Base, 5B: Free end 6: Flap forming sheet, 6A: One side (with free end sandwiched), 6B: 7: Flap elastic member, 7A: First flap elastic member, 7B: Second flap elastic member, 7C: Third flap elastic member 8: Welding portion 9: Bonding portion

Claims (9)

An absorbent article having a top sheet, a back sheet, and an absorbent body disposed therebetween, and provided with rising flaps on the skin surface side,
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,
The rising flap is provided with a first flap elastic member, a second flap elastic member, and a third flap elastic member from the free end side between one side and the other side of the folded flap forming sheet, and Elastic members are provided between the free end and the first flap elastic member, between the first flap elastic member and the second flap elastic member, and between the second flap elastic member and the third flap elastic member. is not
The first flap elastic member, the second flap elastic member, and the third flap elastic member are adhered to one side and the other side of the folded flap forming sheet, and the first flap elastic member and the second flap elastic member are adhered to each other. A non-adhesive region is formed between the folded flap-forming sheets, where the one side and the other side are not adhered to each other,
a separation interval between the first flap elastic member and the second flap elastic member is wider than a separation interval between the second flap elastic member and the third flap elastic member;
one side and the other side of the folded flap forming sheet are welded to each other at a welding portion formed closer to the base than the third flap elastic member ;
The absorbent article , wherein the rising flap is formed without bending from the base portion to the second flap elastic member . 2. The folded flap forming sheet has one side sandwiching the free end extending from the base to the free end, and the other side sandwiching the free end extending halfway from the free end to the base. Absorbent article according to. 3. The length in the width direction of the other side of the flap-forming sheet that has been folded back is 50% or more and 95% or less of the length in the width direction from the base portion of the rising flap to the free end. absorbent article. The absorbent article according to any one of claims 1 to 3, wherein a plurality of said welded parts are arranged side by side in the front-rear direction. 5. The welding part according to any one of claims 1 to 4, wherein a plurality of welding lines arranged at an angle of 30° to 150° with respect to the extending direction of the free end are formed side by side in the front-rear direction. The absorbent article described. The distance between the first flap elastic member and the second flap elastic member is 1.2 times or more and 5.0 times or less than the distance between the second flap elastic member and the third flap elastic member. Item 6. The absorbent article according to any one of Items 1 to 5. The absorbent according to any one of claims 1 to 6, wherein the spacing between the first flap elastic member and the free end is narrower than the spacing between the second flap elastic member and the third flap elastic member. sexual goods. The absorbent article according to any one of claims 1 to 7, wherein the front-rear end portions of the rising flaps are adhered to the top sheet by adhesive portions extending in the front-rear direction in stripes. The non-adhesive region extends to the front and rear ends of the folded flap forming sheet, and forms an air passage extending from the front end to the rear end of the folded flap forming sheet. 9. The absorbent article according to any one of 1-8.

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