JP4459753B2 - Absorbent articles - Google Patents

Description

  The present invention relates to an absorbent article that receives excrement from a wearer and a method for manufacturing the same.

  Conventionally, as an absorbent article used for disposable diapers or the like, a main body provided with an absorbent core formed of pulverized pulp or the like between a top sheet and a back sheet, and urine attached to both sides of the main body What is provided with the three-dimensional gather which prevents leaks, etc. is used. In such an absorbent article, the three-dimensional gathers are in flexible contact with the skin near the base of the wearer's foot and prevent the excrement from leaking out.

In addition, a technique for preventing leakage of excrement from not only the vicinity of the base of the foot but also the wearer's abdomen and back is proposed. For example, in Patent Document 1, a hydrophilic leakage prevention sheet can be raised so as to cover the rear part of the absorbent body (main body part) and the rising band material (three-dimensional gather) on the back part of the surface that contacts the skin of the disposable pants. The technique which forms a pocket in the part enclosed by the sheet | seat for leak prevention and the standing band material by joining to, and prevents the leakage from the back side of excrement, such as loose stool, is disclosed. Furthermore, by attaching a rising gather elastic thread (elastic member) to the rising band material and the leakage prevention sheet, the leakage prevention sheet is greatly raised together with the rising band material to increase the pocket capacity. A technique for more efficiently preventing the leakage of the liquid is also disclosed.
JP 2001-37809 A

  By the way, in such an absorptive article, since the elastic member is attached to the rising band material also on the abdomen side (front part) and the back side (rear part) of the main body part, the abdomen side of the wearer In addition, the absorbent article may be excessively curved on the back side and the rising band may be released from the wearer's skin, and as a result, excrement leaks from the gap formed between the rising band and the wearer. There is a fear.

  This invention is made | formed in view of the said subject, and aims at improving the adhesiveness of a side wall part and a wearer's skin in the side of a front part and a back part.

The invention according to claim 1 is an absorbent article that is attached to a cover member and receives excrement from the wearer, and is in contact with the skin on the abdomen and dorsal side of the wearer, respectively, and A substantially rectangular and substantially sheet-shaped main body having an absorption part between the front part and the rear part, and the main body over substantially the entire length in the longitudinal direction in which the front part, the absorption part and the rear part are arranged. A pair of side wall parts provided on both sides of the part, each of the pair of side wall parts rising toward the wearer side by contracting on the side of the absorption part, and the front On the side of the rear part and the rear part, the part continuous from the three-dimensional gathered part falls down to the center line side of the main body part on the upper surface side in contact with the wearer, and is less folded than the three-dimensional gathered part With the door, the body portion comprising an absorbent core, a topsheet covering one major surface of the absorbent core, and a backsheet covering the other main surface of said absorbent core, said absorbent core in said absorbent unit Is smaller than the width of the absorbent core in the front part and the rear part, and in each of the pair of side wall parts, an elastic member is bonded to the solid gather part in parallel to the longitudinal direction of the main body part, When the elastic member contracts, the three-dimensional gather portion contracts, and in a state where the elastic member is extended from both ends and the gathers of the three-dimensional gather portion are spread flat, the elastic member is placed outside the width direction of the absorbent core. Located .
Invention of Claim 2 is an absorbent article of Claim 1, Comprising: In each of a pair of said side wall part, the said elastic member is adhere | attached only on the said three-dimensional gather part.
Invention of Claim 3 is an absorbent article of Claim 2, Comprising: In each of a pair of said side wall part, the said elastic member is extended from both ends, and the said gathers of the said three-dimensional gather part are flattened. The length of the elastic member in the expanded state is substantially equal to the length of the main body.
Invention of Claim 4 is an absorbent article of Claim 3, Comprising: Each of a pair of said side wall part is a two-layer sheet-like member on both sides of the said elastic member, The said elastic member The surplus part which continues from the part adhere | attached on the said three-dimensional gather part is hold | maintained in the non-adhesion state in the said folding | turning part.
Invention of Claim 5 is an absorbent article of Claim 1, Comprising: In each of a pair of said side wall part, the cross-sectional area of the site | part which contributes to the shrinkage | contraction of the said three-dimensional gather part among the said elastic members is provided. It is larger than the cross-sectional area of the part contributing to the shrinkage of the folded portion.

Invention of claim 6, The absorbent article according to claim 5, wherein the resilient member over the respective entire length of the pair of side wall portions is bonded, the previous SL elastic member, the standing gathers A first elastic member adhered only to the portion and a second elastic member adhered over the entire length of the side wall portion.

The invention according to claim 7 is the absorbent article according to claim 6 , wherein the first elastic member and the second elastic member are made of the same material and have the same stretchability.

In this invention, the adhesiveness of a side wall part and a wearer's skin can be improved in the side of a front part and a back part .

FIG. 1 is a plan view showing an absorbent article 1 according to the first embodiment of the present invention. The absorbent article 1 includes a substantially sheet-shaped main body 2 and the (+ X) side of the main body 2 and the (−X) side over almost the entire length in the longitudinal direction of the main body 2 (that is, the Y direction in FIG. 1). And a pair of side wall portions 3 provided on the side, and used for disposable diapers that receive excrement from the wearer. In FIG. 1, the main surface on the (+ Z) side of the main body 2 is a surface in contact with the wearer (hereinafter referred to as “upper surface”).

  As shown in FIG. 1, the main body 2 includes a front part 21 and a rear part 23 that are in contact with the wearer's abdomen and back skin, respectively, and an absorption part 22 between the front part 21 and the rear part 23. The front portion 21, the absorption portion 22, and the rear portion 23 are arranged along the Y direction.

  The side wall 3 is a band-like member that is long in the Y direction, and is joined to both sides of the main body 2. The side wall portion 3 is a two-layer sheet-like member sandwiching a plurality of elastic members 33 extending in the Y direction, and each elastic member 33 is located on the side of the absorbing portion 22 (that is, the (+ X) side and the (−X) side. It is bonded in parallel to the Y direction only on the part of the) side). Hereinafter, the part bonded to the side wall 3 of the elastic member 33 is referred to as “bonding part 331” and is a part on the (+ Y) side or (−Y) side of the bonding part 331 and bonded to the side wall 3. The missing part is referred to as “non-adhered part 332”. As shown in FIG. 1, in the state where the absorbent article 1 is expanded, the adhesion site 331 of the elastic member 33 is in an expanded state. In addition, the side wall part 3 may fold a single-layer sheet-like member into two layers, or may be a laminate of two single-layer sheet-like members joined together.

  FIG. 2 is a perspective view showing the absorbent article 1. As shown in FIG. 2, in the absorbent article 1, the adhesive portion 331 of the elastic member 33 contracts, so that the side wall portion 3 contracts toward the wearer side on the side of the absorbing portion 22 (that is, the upper surface). A three-dimensional gather (so-called leg gather) is formed that stands up and abuts near the base of the wearer's foot when worn. Hereinafter, the part which forms the three-dimensional gather of the side wall part 3 is called "three-dimensional gather part 32".

  Moreover, in the side wall part 3, in the side of the front part 21 and the rear part 23, the site | part which continues from the solid gather part 32 is a centerline (refer code | symbol 2J in FIG. 1) along the Y direction of the main-body part 2 on the upper surface side. ) Side, and at the front end portion and the rear end portion in the longitudinal direction of the main body portion 2 (that is, the (+ Y) side end portion of the front portion 21 and the (−Y) side end portion of the rear portion 23). The folding is fixed to the upper surface side of the main body 2 by joining. Hereinafter, the portion of the side wall portion 3 that is folded back to the center line side of the main body portion 2 on the (+ Y) side and the (−Y) side of the three-dimensional gather portion 32 is referred to as a “folded portion 31”. In the folded portion 31, a non-adhered portion 332 continuous from the bonded portion 331 of each elastic member 33 is held as an excess portion, whereby the shrinkable property of the folded portion 31 is only the contractibility of the sheet itself, and the three-dimensional gather portion It becomes lower than 32 contractility. As will be described later, since the elastic member 33 is cut together with the main body portion 2 in the extended state at the time of manufacture, the length of each elastic member 33 is determined by extending the elastic member 33 from both ends to reduce the gather of the three-dimensional gather portion 32. It is almost equal to the length of the main body 2 when it is flattened.

  3 to 5 are partial cross-sections in which a part on the (+ X) side of the absorbent article 1 is cut along a plane perpendicular to the Y direction at positions AA, BB, and CC shown in FIG. FIG. FIG. 3 shows the absorption part 22 of the main body part 2 and the three-dimensional gather part 32 of the side wall part 3. 4 and 5 show the rear part 23 of the main body part 2 and the folded part 31 of the side wall part 3, FIG. 4 is a partial sectional view between the rear end part and the three-dimensional gather part 32, and FIG. 5 shows the rear end part. FIG. For convenience of illustration, the internal structure of the side wall 3 is not shown in FIGS. 3 to 5, but the actual side wall 3 has two layers sandwiching the elastic member 33 as described above. It is a sheet-like member. Moreover, the structure of the front part 21 (refer FIG. 1) of the main-body part 2 and the folding | returning part 31 of the side wall part 3 provided in the side of the front part 21 is substantially the same as FIG. 4 and FIG. The structure on the (−X) side of the property article 1 is symmetric with the structure on the (+ X) side shown in FIGS. 3 to 5.

  As shown in FIG. 3, the main body 2 includes a liquid-absorbing absorbent core 2b, a top sheet 2a that covers the main surface of the absorbent core 2b on the wearer side (that is, the (+ Z) side), and the absorbent core 2b. A back sheet 2c covering the other main surface is provided. The top sheet 2a and the back sheet 2c are joined around the absorbent core 2b by a hot melt adhesive or the like. In the main body 2, as shown by a thick broken line in FIG. 1, the width in the X direction of the absorbent core 2 b in the absorbent portion 22 is made smaller and thicker than the width in the front portion 21 and the rear portion 23.

  The top sheet 2a shown in FIG. 3 is a non-woven fabric formed of a liquid-permeable material, for example, hydrophilic fiber, and captures moisture from excrement from the wearer and moves it to the absorbent core 2b. Nonwoven fabrics used as the top sheet 2a are, for example, point bond nonwoven fabrics, air-through nonwoven fabrics, and spunlace nonwoven fabrics, and cellulose, rayon, cotton, and the like are usually used as hydrophilic fibers forming these nonwoven fabrics. As the top sheet 2a, a liquid-permeable non-woven fabric formed of hydrophobic fibers (for example, polypropylene, polyethylene, polyester, polyamide, nylon) whose surface is hydrophilically treated with an activator may be used. A plastic film having holes may be used.

  The absorbent core 2b is obtained by wrapping a mixture of a hydrophilic fiber (for example, pulverized pulp fiber or cellulose fiber) with a granular water-absorbing polymer (for example, SAP (Super Absorbent Polymer)) with tissue paper or a liquid-permeable sheet. The moisture formed and absorbed through the top sheet 2a is quickly fixed. Tissue paper or the like that wraps hydrophilic fibers prevents the hydrophilic fibers from being deformed and the water-absorbing polymer from falling off.

  The back sheet 2c is a water-repellent or liquid-impervious nonwoven fabric, and the moisture that has permeated through the top sheet 2a and the moisture once absorbed by the absorbent core 2b are outside the main body 2 (that is, on the (−Z) side). ) Prevent exudation. Nonwoven fabrics used as the backsheet 2c are, for example, spunbond nonwoven fabrics, meltblown nonwoven fabrics, and SMS (spunbond / meltblown / spunbond) nonwoven fabrics, and may be subjected to water repellent treatment as necessary. A water-repellent or liquid-impervious plastic film, a composite material of the nonwoven fabric and the plastic film, or the like may be used as the back sheet 2c. In this case, from the viewpoint of the wearer's comfort, it is preferable to use a plastic film having air permeability.

  The side wall 3 is formed of a water-repellent or liquid-impervious non-woven fabric (for example, spunbond non-woven fabric, melt blown non-woven fabric, SMS non-woven fabric), a plastic film, or a composite material thereof, similarly to the backsheet 2c.

  As shown in FIGS. 3 to 5, the side wall 3 is joined to the outer surface of the back sheet 2 c, which is the surface opposite to the upper surface of the main body 2 (hereinafter referred to as “rear surface”). As shown in FIG. 3, the top sheet 2 a and a part of the back sheet 2 c are worn together with the three-dimensional gather portion 32 due to the contraction of the three-dimensional gather portion 32 due to the contraction of the adhesion site 331 of the elastic member 33. Stand up toward the person. When the absorbent article 1 is used, an auxiliary absorbent device (so-called urine pad or the like) that is wider than the absorbent core 2b and excellent in liquid absorbency may be used in combination. In this case, as shown by a two-dot chain line in FIG. 3, the auxiliary absorbent 9 is placed on the absorbent portion 22, and sandwiched between the three-dimensional gather portions 32 of the side wall portion 3 from both sides, whereby the absorbent article 1. Attached to the main body 2.

  Further, in the front part 21 and the rear part 23 of the main body part 2, as shown in FIG. 4, the side wall part 3 is folded twice in a substantially Z shape together with a part of the top sheet 2a and the back sheet 2c. So that it is folded back to the center line side of the main body 2 on the upper surface side at a folding position 311 separated from the side edge 24 of the main body 2 to the side, so that the main body 2 is wrapped from the back side. A turned-up folded portion 31 is formed. For this reason, the space which accommodates the auxiliary | assistant absorber 9 in the absorption part 22 vicinity becomes large, and attachment and removal of the auxiliary | assistant absorber 9 to the main-body part 2 are made easy. Further, the shape stability of the three-dimensional gather portion 32 can be improved, and even when the height of the three-dimensional gather portion 32 is increased, the three-dimensional gather portion 32 falls or twists toward the outside or the inside of the main body portion 2. Is prevented.

  As shown in FIG. 5, at the rear end portion of the main body 2, the folded portion of the side wall 3 is separated from the upper surface of the main body 2 (that is, the top sheet 2 a) and the side edge 24 of the main body 2. It fixes by joining with the site | part between the folding | returning positions 311, and the standing to the wearer side of the side wall part 3 is inhibited (same also in the front-end part of the main-body part 2). For this reason, the corners of the auxiliary absorbent 9 (see FIGS. 3 and 4) attached to the main body 2 and pressed from both sides by the pair of three-dimensional gathers 32 are stable in the front part 21 and the rear part 23. It is hold | maintained and the auxiliary | assistant absorbent tool 9 can be reliably hold | maintained by preventing the auxiliary | assistant absorbent tool 9 from winding up and slipping at the time of wear of the absorbent article 1. FIG.

  FIG. 6 is a diagram illustrating a flow of manufacturing steps of the absorbent article 1, and FIGS. 7 and 8 are diagrams illustrating the absorbent article 1 in the course of manufacturing. FIG. 7 is a plan view showing the main body sheet 20 in which the main body 2 is connected in a sheet form, and FIG. 8 is a bottom view showing the main body sheet 20 and the side wall sheet 30. FIG. 9 to FIG. 11 are partial cross-sectional views of the absorbent article 1 in the process of manufacturing at the part that will eventually become the rear part 23 of the absorbent article 1, and the shape of the corresponding part of the front part 21 is substantially the same. . The positions of these cross sections correspond to the positions of DD shown in FIG.

  When the absorbent article 1 is manufactured, first, a mixture of pulverized pulp fibers or the like mixed with a water-absorbing polymer is wrapped with tissue paper or the like to form a plurality of absorbent cores 2b that are absorbent bodies ( Step S11). Subsequently, as shown in FIG. 7, a plurality of absorbent cores 2b arranged in a row at predetermined intervals are sandwiched between the topsheet 2a and the backsheet 2c, and the topsheet 2a is surrounded around each absorbent core 2b. And the back sheet 2c is bonded by a hot melt adhesive or the like, so that the main body sheet 20 which is a continuous body in which the portion that finally becomes the main body 2 (see FIG. 1) of the absorbent article 1 is continuous in the longitudinal direction is obtained. It is formed (step S12).

When the body sheet 20 are formed, a plurality of elastic members 33 is sandwiched by a stretched state between two layers of sheet-like member which is separately prepared, intermittently More it is adhered to the sheet-like member, A side wall sheet 30 that is a continuous body in which a portion (see FIG. 1) that finally becomes one side wall portion 3 of the absorbent article 1 is continuous is formed (step S13). Furthermore, another side wall sheet 30 is formed by the same process as step S13 (step S14). The formation of the two side wall sheets 30 may be performed in parallel with the formation of the main body sheet 20.

  As shown in FIG. 8, the two side wall sheets 30 each having a plurality of elastic members 33 are separated from each other by a predetermined interval on the (+ X) side and the (−X) side of the main body sheet 20. Bonding is performed from the 2c side (step S15). In FIG. 8, the part drawn with the thick broken line of the elastic member 33 shows the part adhere | attached on the side wall sheet 30, The part drawn with a thin broken line shows the part which is not adhere | attached. Hereinafter, the site | part to which the elastic member 33 of the side wall sheet 30 is adhere | attached is called "elastic member adhesion part 301", and the site | part which the elastic member 33 is not adhere | attached is called "elastic member non-adhesion part 302". The two side wall sheets 30 face the main body sheet 20 while facing the elastic member bonding portion 301 on the side of the narrow portion of the absorbent core 2b (that is, the portion that eventually becomes the absorbent portion 22 of the absorbent article 1). Glued along. At this time, as shown in FIG. 9, a part of the side wall sheet 30 is bonded to the back sheet 2c of the main body sheet 20, and the other part is bonded to the top sheet 2a.

  Subsequently, as shown in FIG. 10, the elastic member non-adhered portion 302 of the side wall sheet 30 is located on the back side of the main body sheet 20 on the side of the portion that becomes the front portion 21 and the rear portion 23 of the main body portion 2. 2a and a part of the back sheet 2c are once bent inside (that is, the center line side along the Y direction of the main body sheet 20) (step S16). A part of the folded side wall sheet 30 is joined to the back sheet 2c and a portion of the side wall sheet 30 joined to the back sheet 2c. Furthermore, as shown in FIG. 11, the elastic member non-bonding portion 302 of the side wall sheet 30 is bent outward (that is, the (+ X) side in FIG. 11), and the side edge 240 (that is, the final edge) of the main body sheet 20. The top sheet 2a that extends to the (+ X) side from the portion that becomes the side edge 24 of the main body 2 and is opposed to each other on the main body sheet 20 is bonded by an adhesive or the like (step S17).

  When the side wall sheet 30 is bent outward, as shown in FIG. 4, on the side of the part that becomes the front part 21 and the rear part 23 of the main body part 2, the side sheet 240 is side to the side edge 240 (see FIG. 11). At the folding position spaced apart in the direction, the elastic member non-bonding portion 302 of the side wall sheet 30 is folded back to the center line side of the main body sheet 20 on the top sheet 2a side to form a portion that becomes the folding portion 31 (step S18). . Further, as shown in FIG. 5, the elastic properties of the side wall sheet 30 that are folded back at the portions serving as the front end portion and the rear end portion of the main body portion 2 (that is, in the vicinity of the respective end portions of the plurality of absorbent cores 2 b in FIG. 8). In a state in which the member non-bonding portion 302 is tilted to the center line side of the main body sheet 20, the top sheet 2a and the portion between the side edge 240 of the side wall sheet 30 and the folded position are fixed (step). S19).

  After that, in the gap between adjacent absorbent cores 2b shown in FIG. 8 (that is, the elastic member non-bonding portion 302 of the side wall sheet 30 and the portion fixed to the main body sheet 20 in step S19), the main body sheet 20 and the two The side wall sheet 30 is cut in the Y direction perpendicular to the main body sheet 20, and the plurality of absorbent articles 1 are sequentially manufactured (step S20). In the absorbent article 1, the part that was the main body sheet 20 becomes the main body part 2, and the part that was the two side wall sheets 30 becomes the pair of side wall parts 3. In the side wall part 3, as shown in FIG. 2, when the adhesion part 331 of the elastic member 33 adhered in the stretched state in the three-dimensional gather part 32 contracts, the side wall part 3 rises toward the wearer side and is three-dimensional. A gather is formed. Further, the non-adhesion site 332 that is continuous to the (+ X) side and the (−X) side of the adhesion site 331 is released from the stretched state by the cutting of the side wall sheet 30 in step S <b> 20 and contracts, and is held in the folded portion 31. The

  As described above, in the absorbent article 1, the three-dimensional gather portion 32 rises on the side of the absorbent portion 22 of the main body portion 2, and the side wall portion 3 that is continuous with the three-dimensional gather portion 32 in the front portion 21 and the rear portion 23. The part is folded back to the center line side of the main body part 2 on the upper surface side, and is further fixed at the front end part and the rear end part of the main body part 2 to form the folded part 31. In the absorbent article 1, the shrinkage of the folded part 31 is made lower than the shrinkage of the three-dimensional gather part 32, so that excessive bending of the absorbent article 1 in the front part 21 and the rear part 23 can be prevented. 21 and the side part of the back part 23 can improve the adhesiveness of the side wall part 3 and a wearer's skin. As a result, it is possible to more reliably prevent the leakage of the discharge from the front part 21 and the rear part 23 of the absorbent article 1.

  Moreover, in the absorbent article 1, the height of the side wall part 3 in the front part 21 and the rear part 23 can be made lower than the height of the three-dimensional gather part 32 when the absorbent article 1 is worn. As a result, even when the wearer is in the lateral position, the adhesion between the main body 2 and the skin can be improved in the front portion 21 and the rear portion 23. Further, the folded portion 31 serves as a flow stop for excrement transmitted through the side wall portion 3. As a result, the diffusion of a small amount of liquid (for example, excrement such as urine) transmitted through the skin and the side wall 3 in the front-rear direction is suppressed, and the front and rear end portions of the absorbent article 1 (that is, the wearer's ventral side and back). Further prevention of excrement leakage from the side) is also realized.

  In the absorbent article 1, in the side wall portion 3, the elastic members 33 are bonded only to the three-dimensional gather portion 32, so that only the three-dimensional gather portion 32 is stretchable with a simple structure and almost no stretchability in the folded portion 31. Can be given.

  Further, by cutting the elastic member 33 that is intermittently bonded to the side wall sheet 30 in the stretched state together with the side wall sheet 30 at the non-adhesive portion 332, only the three-dimensional gathered portion 32 has the stretchable side wall portion 3 easily. Can be formed. As a result of such a manufacturing method, the elastic member 33 having substantially the same length as that of the main body 2 in the stretched state is held by the side wall 3, and the adhesion part 331 of the elastic member 33 is The non-adhered part 332 on both sides of the adhesive part 331 is held by the folded part 31 as an extra part.

FIG. 12 is a plan view showing an absorbent article 1a according to the second embodiment of the present invention. In the absorbent article 1a, one elastic member 33 among the plurality of elastic members 33 respectively held by the pair of side wall parts 3 of the absorbent article 1 shown in FIG. 1 is the side wall part 3 parallel to the Y direction. Is bonded over the entire length of Hereinafter, in order to distinguish from the other elastic member 33, the elastic member bonded over the entire length of the side wall portion 3 is referred to as “elastic member 33a”. As shown in FIG. 12, in the state where the absorbent article 1a is expanded, the elastic member 33a is in an expanded state. The elastic member 33a is made of the same material as that of the elastic member 33, and the elastic member 33a and the elastic member 33 have the same cross-sectional area (that is, the same stretchability) in the normal state where the extended state is released.

  In the absorbent article 1a, configurations other than the elastic member 33a are the same as those in FIG. 1, and the same reference numerals are given in the following description. Moreover, the manufacturing process of the absorbent article 1a includes a plurality of elastic members sandwiched in an expanded state between two layers of sheet-like members when the side wall sheet 30 is formed in step S13 in FIG. The only difference is that only the elastic member 33a is bonded to the sheet-like member over the entire length, and the other steps are the same as the manufacturing steps of the absorbent article 1 shown in FIG.

  In the absorbent article 1a, the three-dimensional gathered portion 32 contracts and rises toward the wearer side when the bonding portion 331 of the elastic member 33 and the elastic member 33a contract in the three-dimensional gathered portion 32 of each side wall portion 3. A three-dimensional gather is formed. Further, among the plurality of elastic members bonded to the side wall portions 3, the cross-sectional areas of the portions contributing to the contraction of the three-dimensional gather portion 32 (that is, the bonding portions 331 of the elastic members 33 and the elastic members 33a) are folded back. The cross-sectional area of the part (that is, the elastic member 33a) contributing to the contraction of the portion 31 is made larger. As a result, the side walls 3 can be easily stretched to prevent excessive bending of the absorbent article 1 at the front part 21 and the rear part 23, and at the sides of the front part 21 and the rear part 23. Adhesiveness of the side wall part 3 and a wearer's skin can be improved appropriately.

  In addition, the site | part which contributes to shrinkage | contraction of the side wall part 3 means the site | part adhere | attached on the side wall part 3 of an elastic member, when an elastic member is utilized, and the cross-sectional area is the elastic member adhere | attached Means the total cross-sectional area. When the elastic members 33 and 33a that are bonded have the same stretchability as in the present embodiment, the number of elastic members that are bonded to the three-dimensional gather portion 32 and the folded portion 31 is changed. The cross-sectional area may be changed. Moreover, when the elastic member from which a contraction property differs by the solid gather part 32 and the folding | returning part 31 is adhere | attached, it may be grasped that the cross-sectional area at the time of assuming having the same contraction property is changed.

  As mentioned above, although embodiment of this invention has been described, this invention is not limited to the said embodiment, A various change is possible.

  For example, the elastic member 33 adhered to each side wall 3 of the absorbent article 1 may be one. The side wall 3 may be a single-layer sheet-like member, and the elastic member may be bonded to either main surface.

  The folded portion 31 of the side wall portion 3 does not necessarily have to be folded at the folded position 311 that is laterally separated from the side edge 24 of the main body portion 2, and the side edge 24 is used when the auxiliary absorbent 9 is not used. May be tilted to the center line side of the main body 2. The folded portion 31 is not necessarily formed by being folded so that the belt-like sheet-like member wraps the main body portion 2 from the back side. For example, one edge of the lower surface of the sheet-like member is formed on the lower surface of the main body portion 2. By attaching to a position corresponding to the side edge 24 on the upper surface, the substantially same shape as the folded portion 31 (and the three-dimensional gather portion 32) in the above-described embodiment may be formed. That is, a portion continuous from the three-dimensional gathered portion 32 of the side wall portion 3 falls down to the center line side of the main body portion 2 on the upper surface side and is fixed by joining in a state of being tilted at the front end portion and the rear end portion of the main body portion 2. For example, the folded portion 31 may be provided by various methods.

  When the three-dimensional gather part 32 has sufficient shape stability, the folding of the side wall part 3 of the main body part 2 to the back side of the front part 21 and the rear part 23 of the main body part 2 may be omitted.

  In the absorbent article, the nonwoven fabric manufactured by various manufacturing methods such as the spunlace method, the needle punch method, the thermal bond method, the spunbond method, the chemical bond method, and the air-through method is used. Can be used as

It is a top view which shows the absorbent article which concerns on 1st Embodiment . It is a perspective view which shows an absorbent article. It is a fragmentary sectional view of an absorptive article. It is a fragmentary sectional view of an absorptive article. It is a fragmentary sectional view of an absorptive article. It is a figure which shows the flow of the manufacturing process of an absorbent article. It is a top view which shows a main body sheet | seat. It is a bottom view which shows a main body sheet | seat and a side wall sheet | seat. It is a fragmentary sectional view of an absorptive article. It is a fragmentary sectional view of an absorptive article. It is a fragmentary sectional view of an absorptive article. It is a top view which shows the absorbent article which concerns on 2nd Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,1a Absorbent article 2 Main body part 2a Top sheet 2b Absorption core 2c Back sheet 2J Center line 3 Side wall part 20 Main body sheet 21 Front part 22 Absorption part 23 Rear part 30 Side wall sheet 31 Folding part 32 Three-dimensional gather part 33, 33a Elasticity Member 301 Elastic member adhesion part 302 Elastic member non-adhesion part 331 Adhesion part 332 Non-adhesion part S11-S20 Step

Claims (7)

An absorbent article attached to a cover member and receiving excrement from a wearer,
A substantially rectangular and substantially sheet-shaped main body having a front part and a rear part in contact with the wearer's abdomen and dorsal skin, respectively, and an absorption part between the front part and the rear part;
A pair of side wall portions provided on both sides of the main body portion over substantially the entire length in the longitudinal direction in which the front portion, the absorption portion and the rear portion are arranged;
With
Each of the pair of side wall portions is
A three-dimensional gather portion that rises toward the wearer side by contracting on the side of the absorbent portion;
On the sides of the front part and the rear part, a part continuous from the three-dimensional gather part falls to the center line side of the main body part on the upper surface side in contact with the wearer, and is less contractible than the three-dimensional gather part. A folded portion,
Equipped with a,
The main body is
An absorbent core;
A top sheet covering one main surface of the absorbent core;
A backsheet covering the other main surface of the absorbent core;
With
The width of the absorption core in the absorption part is smaller than the width of the absorption core in the front part and the rear part,
In each of the pair of side wall portions, an elastic member is bonded to the three-dimensional gather portion in parallel to the longitudinal direction of the main body portion, and the three-dimensional gather portion is contracted by contraction of the elastic member, and the elastic member is moved from both ends. The absorbent article , wherein the elastic member is positioned on the outer side in the width direction of the absorbent core in a state where the gathers of the three-dimensional gather portion are flattened and expanded .   The absorbent article according to claim 1,
  In each of a pair of said side wall part, the said elastic member is adhere | attached only on the said three-dimensional gather part, The absorbent article characterized by the above-mentioned.   The absorbent article according to claim 2,
  In each of the pair of side wall portions, the length of the elastic member in a state where the elastic member is extended from both ends and the gathers of the three-dimensional gather portion are spread out is substantially equal to the length of the main body portion. Absorbent article characterized by.   The absorbent article according to claim 3,
  Each of the pair of side wall portions is a two-layer sheet-like member sandwiching the elastic member, and an excess portion continuous from a portion bonded to the three-dimensional gather portion of the elastic member is not in the folded portion. An absorbent article that is held in an adhesive state.   The absorbent article according to claim 1,
  In each of said pair of side wall parts, the cross-sectional area of the site | part which contributes to shrinkage | contraction of the said three-dimensional gather part among the said elastic members is larger than the cross-sectional area of the site | part which contributes to shrinkage | contraction of the said folding | turning part, Goods. The absorbent article according to claim 5 ,
The elastic member is bonded over the entire length of the pair of side wall portions,
Before Symbol elastic member,
A first elastic member bonded only to the three-dimensional gather part;
A second elastic member bonded over the entire length of the side wall,
An absorbent article comprising: The absorbent article according to claim 6 ,
The absorbent article, wherein the first elastic member and the second elastic member are made of the same material and have the same stretchability.

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