JP4526407B2 - Absorbent article and method for manufacturing absorbent article - Google Patents

Description

  The present invention relates to an absorbent article that is attached to a wearer side of an exterior article worn by a wearer and receives excrement from the wearer, and a method for manufacturing the same.

  In a disposable diaper, since it is necessary to replace the entire diaper even when urinating a small amount, an economic burden is increased for the user. Therefore, conventionally, an inexpensive auxiliary absorbent device (so-called urine collecting pad or the like) is attached to the inside of the disposable diaper and worn, and only the auxiliary absorbent device is exchanged when a small amount of urine is discharged.

  As such an auxiliary absorbent device, a main body provided with an absorption core formed of pulverized pulp or the like between a top sheet and a back sheet, and a three-dimensional body attached to both sides of the main body to prevent leakage of urine etc. A thing with gathers is used, and a three-dimensional gather touches the skin near the base of a wearer's foot flexibly, and prevents leakage of excrement. The three-dimensional gather is formed by contraction of an elastic member such as a rubber thread bonded to a sheet-like member in an expanded state.

When using an auxiliary | assistant absorber, when wearing a disposable diaper, it is necessary to prevent that an auxiliary | assistant absorber is drowned between a disposable diaper and a wearer's skin. For example, in Patent Document 1, in the absorbent core of the absorbent article (auxiliary absorbent device), the absorbent article is placed on the wearer side by making the bending resistance of the central region in the lateral direction (width direction) higher than that of the both side regions. The technique which suppresses that an absorbent article drowns at the time of the wearing of the underpants attached to or during wearing is disclosed. Moreover, the top absorbent sheet of the disposable diaper (that is, the sheet on the wearer's side) is also fastened with a hook-and-loop fastener provided on the back sheet of the auxiliary absorbent device, thereby suppressing the auxiliary absorbent device from being twisted. It has been broken.
JP 2000-225138 A

  By the way, when wearing a disposable diaper fitted with such an auxiliary absorbent device (particularly when raising and lowering a pants-type disposable diaper), the auxiliary absorption is caused by friction generated between the auxiliary absorbent device and the skin of the wearer. The four corners of the tool may bend and bend toward the wearer. In the conventional auxiliary absorbent device in which the three-dimensional gather is formed over the entire length in the longitudinal direction of the main body portion, the portions on both sides in the width direction where the three-dimensional gather is provided at the end in the longitudinal direction contract the rubber yarn of the three-dimensional gather The four corners of the auxiliary absorbent device are more likely to bend, and the vicinity of the end of the auxiliary absorbent device is fastened to the disposable diaper by a hook-and-loop fastener or the like. However, due to the curvature of the main body, the attachment may be insufficient and the auxiliary absorbent device may be rolled up.

  This invention is made | formed in view of the said subject, and it aims at preventing that the both sides of the width direction are curled by the influence of the shrinkage | contraction of a solid gather part in the edge part of the longitudinal direction of an absorbent article. .

The invention according to claim 1 is an absorbent article that is attached to a wearer side of a disposable diaper worn by the wearer and receives urine from the wearer, the absorbent body, on the wearer side of the absorbent body A main body having a top sheet covering the main surface, and a back sheet covering the other main surface of the absorber; and substantially perpendicular to the longitudinal direction of the main body over the entire length of the main body. A pair of side wall portions joined to both sides in the width direction, and at least one end portion in the longitudinal direction, the portions on both sides in the width direction of the main body portion have corners , Each of the side wall portions is a three-dimensional gather portion that contracts in the vicinity of the center in the longitudinal direction and rises toward the wearer side, and a portion that continues from the solid gather portion in the longitudinal direction, and the longitudinal direction of the main body portion of A non-gather portion joined onto said main body portion in section, of the standing gathers part by the portion bonded to the standing gather portion with longitudinally is bonded only parallel to the standing gather portion shrinks And an elastic member forming a gather.

  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 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.

  The invention according to claim 3 is the absorbent article according to claim 1 or 2, wherein each of the pair of side wall portions is a two-layer sheet-like member sandwiching the elastic member therebetween, The surplus part which continues from the part adhere | attached on the said three-dimensional gather part of an elastic member is hold | maintained in the non-adhesion state in the outer side of the both ends of the said three-dimensional gather part.

Invention of Claim 4 is an absorbent article in any one of Claim 1 thru | or 3, Comprising: At least both sides of the said width direction of the at least one edge part of the said longitudinal direction wear the said main-body part. A fastening part is provided on the side opposite to the person side and fastened to the wearer side of the disposable diaper .

Invention of Claim 5 is an absorbent article in any one of Claim 1 thru | or 4 , Comprising: In the cross section perpendicular | vertical to the said longitudinal direction, said pair of side wall part is the front-end | tip with which the said elastic member is arrange | positioned Are opposite Z-shaped and inverted Z-shaped, and the lower part is bonded onto the main body .

Invention of Claim 6 is an absorbent article in any one of Claim 1 thru | or 5, Comprising : The said disposable diaper is a pants type.

Invention of Claim 7 is a manufacturing method of the absorbent article which is attached to the wearer side of the disposable diaper which a wearer wears, and receives the urine from the said wearer, Comprising: It absorbs with a top sheet and a back sheet A process of forming a main body sheet that is a continuous body with the body sandwiched therebetween, and an elastic member is sandwiched between two layers of sheet-like members in an expanded state, and the elastic member is intermittently adhered to the sheet-like member. Forming the first side wall sheet, which is a body, and sandwiching the elastic member in an extended state between the two sheet-like members, and intermittently placing the elastic member in the same manner as the first side wall sheet Forming a second side wall sheet which is a continuous body by bonding to the main body sheet, and a predetermined distance between the first side wall sheet and the second side wall sheet with the elastic member bonded portion facing each other. Glue along Comprising a step, and said body sheet and the step of cutting the first side wall sheet and the second side wall sheet in the direction perpendicular to the body sheet at the non-adhering portion of the elastic member, the step of the cleavage, said body A portion that was a sheet becomes a main body portion, and a portion that was the first side wall sheet and the second side wall sheet becomes a pair of side wall portions joined to both sides in the width direction of the main body portion, and the first side wall sheet and Of the second side wall sheet, a portion where the elastic member is bonded becomes a three-dimensional gathered portion that rises toward the wearer side, a portion where the elastic member is not bonded becomes a non-gathered portion, and at least in the longitudinal direction of the main body portion One end portion has a shape in which both side portions of the body portion in the width direction have corner portions, and the non-gather portion is an end portion in the longitudinal direction of the body portion. It is joined on Oite the body portion.

  In this invention, it can prevent that the site | part of the both sides of the width direction in the edge part of the both sides of the longitudinal direction of an absorbent article drowns by the influence of the shrinkage | contraction of a three-dimensional gather part. In invention of Claim 7, an absorbent article can be manufactured easily.

  FIG. 1 is a plan view showing a configuration of an absorbent article 1 according to an embodiment of the present invention. The absorbent article 1 is an auxiliary absorbent that is attached to the inside (that is, the wearer side) of a pants-type disposable diaper that is an exterior article worn by the wearer and receives excrement from the wearer.

  As shown in FIG. 1, the absorbent article 1 includes a substantially sheet-like main body 2 and the length of the main body 2 over almost the entire length in the longitudinal direction of the main body 2 (that is, the Y direction in FIG. 1). A pair of side wall portions 3 provided on both sides in the width direction perpendicular to the direction (that is, the X direction) is provided. In FIG. 1, the main surface on the (+ Z) side of the main body 2 is a surface in contact with the wearer. The main body 2 includes a front part 201 and a rear part 203 facing the abdomen and back sides of the wearer, and an intermediate part 202 between the front part 201 and the rear part 203, and the front part 201, the intermediate part 202, and The rear part 203 is arranged along the longitudinal direction. In the absorbent article 1, at both end portions in the longitudinal direction, the portions on both sides in the width direction of the main body portion 2 are shaped to have corners.

  The absorbent article 1 also includes two fastening portions 4 that are provided on the opposite side of the body portion 2 from the wearer side in the vicinity of both ends in the longitudinal direction of the body portion 2 and extend in the width direction. The fastening part 4 is a hook-and-loop fastener having a large number of minute hook members, and faces the wearer side of the disposable diaper when the absorbent article 1 is attached to the disposable diaper. Removably joined to the inner fiber group.

  FIG. 2 is a cross-sectional view of the absorbent article 1 cut along a plane perpendicular to the Y direction at the position AA shown in FIG. 1 (that is, the position corresponding to the intermediate portion 202 of the main body 2). As shown in FIGS. 1 and 2, each of the pair of side wall portions 3 is a strip-like member that is long in the longitudinal direction, and is joined to both sides in the width direction of the main body portion 2. The side wall portion 3 is a two-layer sheet-like member sandwiching an elastic member 33 extending in the longitudinal direction, and the elastic member 33 is located on the side of the intermediate portion 202 (that is, the (+ X) side and the (−X) side). It is bonded in parallel with the longitudinal direction only by the hot melt adhesive or the like. 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”.

  The side wall 3 is formed of a water-repellent or liquid-impervious nonwoven fabric (for example, a spunbond nonwoven fabric, a meltblown nonwoven fabric, an SMS (spunbond / meltblown / spunbond) nonwoven fabric), a plastic film, or a composite material thereof. . From the viewpoint of improving the comfort of the absorbent article 1, it is preferable that the side wall portion 3 has air permeability. As the elastic member 33, polyurethane yarn, polyurethane film, natural rubber or the like is used. The side wall portion 3 may be formed by folding a single-layer sheet-like member into two layers, or may be formed by stacking and joining two single-layer sheet-like members. Moreover, the side wall part 3 should just be a structure which can be regarded as a sheet-like member of two layers substantially, and only the site | part which pinches | interposes the elastic member 33 is made into two layers in FIG.

  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 the absorbent article 1, the adhesion part 331 of the elastic member 33 contracts, so that the vicinity of the center in the longitudinal direction of the side wall part 3 on the side of the intermediate part 202 (that is, the part where the elastic member 33 of the side wall part 3 is adhered). ) Contracts, rises toward the wearer, and forms a three-dimensional gather (so-called leg gather) that 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". In other words, the elastic member 33 is bonded only to the three-dimensional gather portion 32 in the side wall portion 3.

  Further, in the side wall part 3, a part continuous from the three-dimensional gather part 32 is joined to the main body part 2 at the end in the longitudinal direction of the main body part 2 on the sides of the front part 201 and the rear part 203. Hereinafter, the outer (ie, (+ Y) side and (−Y) side) portions of both ends of the three-dimensional gather portion 32 in the longitudinal direction are referred to as “non-gathered portions 31”. In the non-gathered portion 31, a non-adhered portion 332 that continues from the bonded portion 331 of each elastic member 33 is held as an excess portion. It becomes lower than the contractibility of the gather part 32. As will be described later, since the elastic member 33 is cut together with the main body 2 in a stretched state at the time of manufacture, the elastic member 33 is stretched from both ends so that the gathers of the three-dimensional gathered portion 32 are spread flat. The length 33 is substantially equal to the length of the main body 2 in the expanded state as shown in FIG.

  As shown in FIGS. 1 and 2, the main body 2 includes an absorbent core 22 that is an absorbent body, a top sheet 21 that covers a main surface of the absorbent core 22 on the wearer side (that is, the (+ Z) side), and an absorbent body. A back sheet 23 covering the other main surface of the core 22 is provided. In the absorbent core 22 of the absorbent article 1, the width in the X direction of the absorbent core 22 in the intermediate portion 202 is smaller than the width in the front portion 201 and the rear portion 203, as shown in FIG. The absorption core 22 is a so-called hourglass shape.

  The top sheet 21 and the back sheet 23 are joined to each other around the absorbent core 22 by a hot melt adhesive or the like. In the intermediate portion 202, the top sheet 21 and the back sheet 23 are joined at the side of the absorbent core 22, and then cut along the edge of the absorbent core 22 at a certain distance from the edge, and the front portion 201 and the rear portion The width is made smaller than 203. In the front part 201 and the rear part 203, the back sheet 23 is joined to the top sheet 21 on both sides in the width direction of the absorbent core 22.

  The top sheet 21 is a non-woven fabric formed of a liquid-permeable material, for example, a hydrophilic fiber, and quickly captures moisture of excrement from the wearer and moves it to the absorbent core 22. Nonwoven fabrics used as the top sheet 21 are, for example, point bond nonwoven fabrics, air-through nonwoven fabrics, and spunlace nonwoven fabrics. As hydrophilic fibers forming these nonwoven fabrics, cellulose, rayon, cotton, or the like is usually used. As the top sheet 21, a liquid-permeable nonwoven fabric formed of hydrophobic fibers (for example, polypropylene, polyethylene, polyester, polyamide, nylon) whose surface is hydrophilically treated with a surfactant may be used. Alternatively, a plastic film having an aperture may be used.

  The absorbent core 22 is made of a mixture of a hydrophilic fiber (for example, pulverized pulp fiber or cellulose fiber) mixed with a granular water-absorbing polymer (for example, SAP (Super Absorbent Polymer)) such as a tissue paper or a liquid-permeable nonwoven fabric. It is formed by wrapping with a sheet and absorbs moisture that has passed through the top sheet 21 to quickly fix it. The cover sheet that wraps the hydrophilic fiber is bonded to the hydrophilic fiber and the water-absorbing polymer with a hot-melt adhesive to prevent the hydrophilic fiber from losing its shape and the water-absorbing polymer from falling off (especially after water absorption). To do.

  Examples of the hot melt adhesive used for joining the covering sheets include SIS (styrene-isoprene-styrene), SBS (styrene-butadiene-styrene), SIBS (styrene-isoprene-butadiene-styrene), and SEBS (styrene- Styrene elastomers such as ethylene-butylene-styrene) and SEPS (styrene-ethylene-propylene-styrene), or elastomers such as ethylene / vinyl acetate, polyester, acrylic, polyolefin, or polyisobutylene, Hot melt adhesives of rubbers such as butyl rubber, polyisoprene and natural rubber are used.

  The backsheet 23 is a water-repellent or liquid-impervious nonwoven fabric, and the moisture that has permeated through the topsheet 21 and the moisture once absorbed by the absorbent core 22 are opposite to the wearer side of the main body portion 2 (that is, , (-Z) side). Nonwoven fabrics used as the backsheet 23 are, for example, spunbond nonwoven fabrics, melt blown nonwoven fabrics, and SMS 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 23. In this case, from the viewpoint of the wearer's comfort, it is preferable to use a plastic film having air permeability.

  Next, the manufacturing method of the absorbent article 1 is demonstrated. FIG. 3 is a diagram illustrating a flow of manufacturing steps of the absorbent article 1, and FIGS. 4 to 6 are diagrams illustrating the absorbent article 1 in the course of manufacturing. FIG. 4 is a plan view showing the main body sheet 20 in which the main body portion 2 is connected in a sheet form, and FIGS. 5 and 6 are plan views showing the main body sheet 20 and the side wall sheet 30.

  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 22 (step S11). . Subsequently, as shown in FIG. 4, a plurality of absorbent cores 22 arranged in a row at predetermined intervals are sandwiched between the top sheet 21 and the back sheet 23, and the side of each absorbent core 22 and adjacent to each other. The top sheet 21 and the back sheet 23 are bonded by a hot-melt adhesive or the like between the absorbent cores 22 to be finished, so that the portion that finally becomes the main body 2 (see FIG. 1) of the absorbent article 1 is in the longitudinal direction. It is formed as a main body sheet 20 which is a continuous body (step S12).

  When the main body sheet 20 is formed, the elastic member 33 is sandwiched in a stretched state between two separately prepared sheet-like members, and is intermittently bonded to the sheet-like member. The part (refer FIG. 1) used as the one side wall part 3 of the absorbent article 1 is formed as the side wall sheet 30 which is a continuous body (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. 2, the two side wall sheets 30 each having the elastic member 33 are bent in a Z shape (or an inverted Z shape), and the lower portion bent in the Z shape is shown in FIG. As shown in FIG. 3, the top sheet 21 of the main body sheet 20 is bonded to the (+ X) side and the (−X) side with a predetermined distance (step S15). In FIG. 5, the adhesion site | part 331 of the elastic member 33 is shown with a thick broken line, and the non-adhesion site | part 332 is shown with a thin broken line. 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 elastic member bonding portion 301 on the side of the narrow portion of the absorbent core 22 (that is, the portion that eventually becomes the intermediate portion 202 (see FIG. 1) of the main body portion 2). And bonded along the main body sheet 20.

  Furthermore, it was bent into a Z-shape (or an inverted Z-shape) at portions that are both ends in the longitudinal direction of the main body 2 (that is, in the vicinity of each end of the plurality of absorbent cores 22 in FIG. 5). The upper part of the side wall sheet 30 is fixed to the lower part bonded to the top sheet 21 and the top sheet 21 (that is, in a folded state) (step S16).

  When the two side wall sheets 30 are fixed to the main body sheet 20, the fastening portion 4 (not shown) is joined to a predetermined portion of the back sheet 23 of the main body sheet 20 (step S17), as shown in FIG. A part of the top sheet 21, the back sheet 23, and the side wall sheet 30 (the elastic member bonding portion 301 thereof) is a certain distance from the edge along the edge of the absorbent core 22 on the side of the narrow portion of the absorbent core 22. (Step S18).

  Thereafter, in the gap between adjacent absorbent cores 22 (that is, the portion of the side wall sheet 30 which is the elastic member non-bonding portion 302 and fixed to the main body sheet 20 in step S16), the main body sheet 20 and the two side wall sheets 30 are A plurality of absorbent articles 1 are sequentially manufactured by cutting in the Y direction perpendicular to the main body sheet 20 (step S19).

  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. Further, the elastic member bonding portion 301 and the elastic member non-bonding portion 302 of the side wall sheet 30 become the three-dimensional gathered portion 32 and the non-gathered portion 31 of the side wall portion 3. In the side wall part 3, when the adhesion | attachment site | part 331 of the elastic member 33 adhere | attached in the expansion | extension state in the three-dimensional gather part 32 shrink | contracts, the side wall part 3 stands up toward a wearer side, and a three-dimensional gather is formed. Further, the non-adhesion part 332 that is continuous to the (+ Y) side and the (−Y) side of the adhesion part 331 of the elastic member 33 is released and contracted by the cutting of the side wall sheet 30 in step S19, and the non-gather part. 31 is held by a non-adhesive body.

  As described above, in the absorbent article 1, the elastic member 33 is bonded only to the three-dimensional gathered portion 32 in each of the pair of side wall portions 3, and is not bonded to the non-gathered portion 31. For this reason, in a state where the elastic member 33 contracts and a three-dimensional gather is formed, the width direction at the ends of the main body portion 2 where the non-gathered portions 31 are joined, that is, at both ends in the longitudinal direction of the main body portion 2. It can prevent (or suppress) that the site | part of both sides of this is pulled by the elastic member 33, and drowns on a wearer side. As a result, leakage of urine or the like to the outer disposable diaper due to the inner absorbent article 1 being swollen can be prevented.

  Moreover, since the absorbent article 1 is equipped with the fastening part 4 extended in the width direction in the edge part vicinity of the both sides of the longitudinal direction of the main-body part 2, and is attached to the inner side of a disposable diaper by the fastening part 4, a main-body part 2 is prevented from separating from both ends of the disposable diaper, and it is possible to more reliably prevent the portions on both sides in the width direction at the ends on both sides in the longitudinal direction of the main body 2 from being broken.

  Thus, since the absorbent article 1 can prevent the end of the end in the longitudinal direction from curling, the portions on both sides in the width direction at at least one end in the longitudinal direction are worn by the wearer during wearing. It is particularly suitable for an absorbent article provided with a main body portion having corner portions that are easily caught by skin. Moreover, the absorbent article 1 is an auxiliary | assistant, such as a urine picking pad attached to the inner side of the underpants type disposable diaper which is easy to produce friction with a wearer's skin at the time of wear compared with what is called an open type disposable diaper. It is particularly suitable for an absorbent device, and by using the absorbent article 1, leakage of urine or the like to the disposable diaper can be prevented.

  In the manufacturing method of the absorbent article 1 described above, only the three-dimensional gather portion 32 is obtained 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. The side wall part 3 which has a stretching property can be formed easily, and the absorbent article 1 can be manufactured easily. As a result of such a manufacturing method, the elastic member 33 having a length substantially equal to that of the main body 2 in the stretched state is held by the side wall 3, and the adhesion site 331 of the elastic member 33 is The non-adhesive part 332 on both sides of the adhesive part 331 is held by the non-gather part 31 as a surplus part.

  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, a plurality of elastic members 33 may be provided on each of the pair of side wall portions 3. Further, the side wall 3 may be a single-layer sheet-like member, and the elastic member 33 may be bonded to one of the main surfaces.

  The fastening portion 4 is not limited to one surface fastener extending in the width direction, and may be a set of a plurality of relatively small surface fasteners. For example, two small surface fasteners may be provided on both sides in the width direction. In the absorbent article 1, the fastening parts 4 are provided at least on both sides in the width direction at at least one end in the longitudinal direction, so that the portions on both sides in the width direction at the end in the longitudinal direction of the absorbent article 1 are wrinkled. Can be prevented more reliably. When the fastening part 4 is provided only at one end of the absorbent article 1, the fastening part 4 is more preferably provided in the vicinity of the end of the rear part 203 of the absorbent article 1. On the back side of a pants-type disposable diaper for wearing purposes, it is difficult to apply force to the fastening part 4 when attaching the absorbent article 1, and on the back side when wearing the disposable diaper to which the absorbent article 1 is attached. However, it is difficult to prevent the end of the absorbent article 1 from curling because the hand is difficult to reach, but by providing the fastening portion 4 at the rear portion 203, it is possible to prevent the back side from being curled.

  The fastening part 4 may also be a pressure-sensitive adhesive such as a hot melt adhesive. In this case, in the absorbent article 1 before being attached to a disposable diaper or the like, a peeling tape is provided so as to cover the fastening part 4. Provided.

  In the manufacturing method described above, the bonding between the top sheet 21 and the back sheet 23 around the absorbent core 22 is not limited to bonding with a hot melt adhesive, and may be performed by, for example, heat sealing or ultrasonic bonding.

The absorbent article 1, in addition to pants type of disposable diapers, in one disposable Homme of open type to wear a site in contact with the ventral side of the wearer to the site and the back side in contact with and fastened at the waist around You may utilize as an auxiliary | assistant absorber which is attached.

It is a top view of an absorptive article. It is sectional drawing of an absorbent article. It is a figure which shows the flow of the manufacturing process of an absorbent article. It is a figure which shows the absorbent article in the middle of manufacture. It is a figure which shows the absorbent article in the middle of manufacture. It is a figure which shows the absorbent article in the middle of manufacture.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Absorbent article 2 Main body part 3 Side wall part 4 Fastening part 20 Main body sheet 21 Top sheet 22 Absorption core 23 Back sheet 30 Side wall sheet 32 Three-dimensional gather part 33 Elastic member 301 Elastic member adhesion part 302 Elastic member non-adhesion part 331 Adhesive part 332 Non-adhesion site S11-S19 Step

Claims (7)

An absorbent article attached to a wearer side of a disposable diaper worn by a wearer and receiving urine from the wearer,
A main body having an absorbent body, a top sheet that covers the main surface of the absorbent body on the wearer side, and a back sheet that covers the other main surface of the absorbent body;
A pair of side wall portions joined to both sides in the width direction perpendicular to the longitudinal direction of the main body portion over substantially the entire length of the main body portion;
With
At least one end in the longitudinal direction is a shape in which the portions on both sides in the width direction of the main body have corners,
Each of the pair of side wall portions is
A three-dimensional gather portion that contracts in the vicinity of the center in the longitudinal direction and rises toward the wearer side,
A non-gathered portion that is a part continuous from the three-dimensional gather portion in the longitudinal direction, and is joined onto the main body portion at an end portion in the longitudinal direction of the main body portion;
An elastic member that forms a gather of the three-dimensional gathered portion by being contracted in parallel to the longitudinal direction and contracted only by the three-dimensional gathered portion and the three-dimensional gathered portion.
An absorbent article comprising: The absorbent article according to claim 1,
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 1 or 2,
Each of the pair of side wall portions is a two-layer sheet-like member sandwiching the elastic member, and an excessive portion continuous from a portion bonded to the three-dimensional gather portion of the elastic member is a portion of the three-dimensional gather portion. An absorbent article characterized by being held in a non-adhered state on the outside of both ends. The absorbent article according to any one of claims 1 to 3,
Provided on at least both sides in the width direction of at least one end in the longitudinal direction on the side opposite to the wearer side of the main body and a fastening part fastened to the wearer side of the disposable diaper An absorbent article characterized by the above. The absorbent article according to any one of claims 1 to 4,
In the cross section perpendicular to the longitudinal direction, the pair of side wall portions have a Z-shape and an inverted Z-shape facing the tip where the elastic member is disposed, and a lower portion is bonded onto the main body portion. An absorbent article characterized by the above. The absorbent article according to any one of claims 1 to 5,
The said disposable diaper is a pants type, The absorbent article characterized by the above-mentioned. A method for producing an absorbent article attached to a wearer side of a disposable diaper worn by a wearer and receiving urine from the wearer,
Forming a main body sheet that is a continuous body with an absorbent body sandwiched between a top sheet and a back sheet;
Sandwiching an elastic member in an expanded state between two layers of sheet-like members, and intermittently bonding the elastic member to the sheet-like member to form a first side wall sheet that is a continuous body;
An elastic member is sandwiched between two sheet-like members in an extended state, and the elastic member is intermittently adhered to the sheet-like member in the same manner as the first side-wall sheet to form a second side-wall sheet that is a continuous body. Forming, and
Bonding the first side wall sheet and the second side wall sheet along the main body sheet by opening a predetermined distance while facing a portion where an elastic member is bonded;
Cutting the main body sheet and the first side wall sheet and the second side wall sheet in a direction perpendicular to the main body sheet at a non-adhesive portion of an elastic member;
Equipped with a,
By the cutting step, a portion that was the main body sheet becomes a main body portion, and a pair of side wall portions in which the portions that were the first side wall sheet and the second side wall sheet are joined to both sides in the width direction of the main body portion. And, among the first side wall sheet and the second side wall sheet, the part where the elastic member is bonded becomes a three-dimensional gathered part rising toward the wearer side, and the part where the elastic member is not bonded becomes a non-gathered part,
At least one end in the longitudinal direction of the main body, the portions on both sides in the width direction of the main body are shaped to have corners, and the non-gathered portion is the end in the longitudinal direction of the main body. The manufacturing method of the absorbent article characterized by being joined on the said main-body part .

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