JP2012249942A - Absorbent article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reliably mitigate pressurization against the skin of a wearer, which is caused by a free end elastic member.SOLUTION: An inner sheet 321 which is folded into two on a folding line in the longitudinal direction of a body part 2, is arranged in each side wall part 32 of an auxiliary absorption tool 1. Since a free end elastic member 343 is arranged on the folding line on the inner surface of the inner sheet 321, the inner sheet 321 is erected from the body part 2 with the folding line as a free end in a central part 302 in the longitudinal direction. Further, an outer sheet 322, which is folded into two on the folding line in the longitudinal direction and covers the outer surface of the inner sheet 321, is arranged in each side wall part 32. The inner sheet 321 and the outer sheet 322 are not joined to each other in the neighborhood of the free end. Thus, the pressurization against the skin of a wearer caused by the free end elastic member 343 is reliably mitigated.

Description

  The present invention relates to an absorbent article that receives excrement from a wearer, and a method for manufacturing a side sheet provided in the absorbent article.

  In absorbent articles such as disposable diapers, conventionally, a pair of side wall portions are provided on both side portions of the main body portion, and the elastic yarn or the like provided at the free end of the side wall portion contracts so that one of the side wall portions is contracted. The part stands as a standing part toward the wearer. When the absorbent article is worn, the pair of upright portions becomes a three-dimensional gather that comes into contact with the vicinity of the base of the wearer's foot, thereby preventing excrement from leaking out from the absorbent article.

  Moreover, in the three-dimensional guard (three-dimensional gather) of the diaper of Patent Document 1, the elastic member is bonded and fixed to both of the two sheets on both sides at both ends in the longitudinal direction, and in the region between both ends, The entire longitudinal direction is bonded and fixed to one sheet, and the entire longitudinal direction is not bonded to the other sheet (the sheet forming the inner surface of the three-dimensional guard in the diaper width direction). Therefore, since there is no adhesive for fixing the elastic member on the inner surface in the diaper width direction of the three-dimensional guard at the crotch, that is, the surface that comes into contact with the skin, a soft texture is obtained, and fine gathers are not formed. The pressure on the wearer's skin is reduced.

  In addition, in patent document 2, the special structure of the side wall part of an absorbent article is disclosed, In the said side wall part, the standing part rising from a main-body part to a wearer side, and the wearer side of a standing part A flat portion extending outward in the width direction is provided, and the elastic member is joined to the flat portion. In the absorbent article of patent document 2, when a side wall part closely_contact | adheres to a wearer's skin in a plane part, it is prevented that excrement leaks out from an absorbent article.

JP 2004-337387 A JP 2009-45199 A

  By the way, in the diaper of patent document 1, depending on the wearing state with respect to a wearer, the sheet | seat with which the elastic member was adhere | attached contacts a wearer's skin, and the pressure to the wearer's skin by the said elastic member may not necessarily be relieve | moderated. is there.

  This invention is made | formed in view of the said subject, and it aims at relieving the pressure to a wearer's skin by the elastic member provided in a free end reliably.

  The invention according to claim 1 is an absorbent article that receives excrement from a wearer, and a substantially sheet-like main body portion in which an absorption core is disposed between a back sheet and a top sheet, and the main body portion A pair of side wall portions extending in the longitudinal direction of the main body portion on each side portion of the body, and each side wall portion is folded in two along a folding line along the longitudinal direction, and folded along the longitudinal direction. The fold line is folded in two and is disposed on the fold line on the inner surface of the inner sheet at the center portion in the longitudinal direction and the outer sheet covering the outer surface of the inner sheet, and the fold is thereby contracted. A free end elastic member that raises the inner sheet from the main body using a tatami wire as a free end, and the inner sheet and the outer sheet are not joined to each other in the vicinity of the free end.

  Invention of Claim 2 is an absorbent article of Claim 1, Comprising: The said free end elastic member is joined to the said inner surface of the said inner side sheet | seat.

  Invention of Claim 3 is the absorbent article of Claim 1 or 2, Comprising: In the joining area | region of the fixed end vicinity of the said inner sheet, the inner surfaces of the said inner sheet are mutually joined, The said joining area | region And the inner surface of the inner sheet are not joined to each other between the elastic member and the free end elastic member.

  Invention of Claim 4 is an absorbent article in any one of Claim 1 thru | or 3, Comprising: The said inner sheet | seat and the said outer sheet | seat are one continuous sheet | seat.

  Invention of Claim 5 is an absorbent article in any one of Claim 1 thru | or 4, Comprising: Each said side wall part is arrange | positioned along the said fixed end in the fixed end vicinity of the said inner sheet | seat. A fixed end elastic member is further provided.

  The invention according to claim 6 is the absorbent article according to claim 5, wherein the fixed end elastic member is disposed between the inner sheet and the outer sheet.

  The invention according to claim 7 is the absorbent article according to claim 6, wherein each of the side wall portions further includes another fixed-end elastic member disposed along the fixed end in the vicinity of the fixed end. The other fixed end elastic member is disposed between the inner sheet and the outer sheet, and the inner sheet is sandwiched between the fixed end elastic member and the other fixed end elastic member.

  Invention of Claim 8 is a manufacturing method of the side sheet | seat provided in an absorbent article, Comprising: The process of forming a double sheet | seat by folding the one sheet | seat in two with a 1st fold line, B) a step of arranging an elastic member in a stretched state on a second fold line parallel to the first fold line on the main surface of the double sheet; and c) the second member so as to sandwich the elastic member. Joining the mutually opposing portions of the main surface in the vicinity of the first fold line while folding the heavy sheet in half at the second fold line, and in the vicinity of the second fold line The one sheet and the other sheet of the double sheet are not joined to each other.

  The invention according to claim 9 is the method for manufacturing a side sheet according to claim 8, wherein the step a) includes a1) stretching another elastic member on the first fold line on the sheet. And a2) a step of folding the sheet in half along the first fold line so as to sandwich the other elastic member.

  Invention of Claim 10 is a manufacturing method of the side sheet | seat of Claim 9, Comprising: The said a) process separated from the said 1st fold line a3) before the said a2) process A further step of arranging another elastic member in a stretched state in parallel with the first fold line at a position on the sheet, and in the step a2), the other elastic member is folded in two. It is sandwiched between the sheets.

  The invention according to claim 11 is an absorbent article that receives excrement from the wearer, and a substantially sheet-like main body portion in which an absorbent core is disposed between the backsheet and the topsheet, and It is manufactured with the manufacturing method of the side sheet | seat in any one of 10 thru | or, and is provided with a pair of side sheet | seat extended in the longitudinal direction of the said main-body part on the both sides of the said main-body part.

  ADVANTAGE OF THE INVENTION According to this invention, the pressure to a wearer's skin by a free end elastic member can be relieve | moderated reliably by an outer sheet | seat.

  In the inventions according to claims 5 to 7 and claims 9 and 10, the side wall can be largely erected at the center in the longitudinal direction.

It is a top view of an auxiliary absorber. It is sectional drawing of an auxiliary | assistant absorber. It is a figure which shows the flow of manufacture of a side sheet. It is a figure for demonstrating manufacture of a side seat | sheet. It is a figure for demonstrating manufacture of a side seat | sheet. It is a figure for demonstrating manufacture of a side seat | sheet. It is a figure for demonstrating manufacture of a side seat | sheet. It is a figure which expands and shows the side seat vicinity. It is a figure which shows the other example of an auxiliary | assistant absorber.

  FIG. 1 is a plan view showing an auxiliary absorbent device 1 according to one embodiment of the present invention in an unfolded state. The auxiliary absorbent device 1 is an absorbent article that is attached to the inside (that is, the wearer side) of an exterior article such as a disposable diaper worn by the wearer and receives excrement from the wearer. In FIG. 1, the auxiliary | assistant absorber 1 is drawn with the surface of the side which contact | connects a wearer at the time of wear on this side.

  FIG. 2 is a cross-sectional view of the auxiliary absorbent device 1 cut along a plane perpendicular to the longitudinal direction (that is, the vertical direction in FIG. 1) at the position II-II shown in FIG. In FIG. 2, for convenience of illustration, each component of the auxiliary absorbent 1 is drawn away in the thickness direction (that is, the vertical direction in FIG. 2).

  As shown in FIGS. 1 and 2, the auxiliary absorbent 1 is disposed on the substantially sheet-like main body 2 and on both sides of the main body 2 (that is, on both sides in the width direction perpendicular to the longitudinal direction). A pair of side seats 3 is provided over the entire length of the main body 2 in the longitudinal direction.

  The upper part and the lower part in FIG. 1 of the main body part 2 are parts in contact with the skin on the abdomen and dorsal side of the wearer, respectively. In the following description, “front part” and “rear part” Call. Moreover, the site | part which continues from a front part and a back part between a front part and a back part, and opposes a wearer's crotch part is called a "central part." In the auxiliary absorbent 1, the main body 2 has a front part, a center part, and a rear part in order in the longitudinal direction, and the width in the width direction of the front part and the rear part is larger than the width of the center part. In other words, the main body 2 has a so-called hourglass shape in plan view.

  As shown in FIG. 2, the main body 2 includes a liquid-permeable top sheet 21, a water-repellent or liquid-impervious back sheet 23, and an absorbent core disposed between the top sheet 21 and the back sheet 23. 22. The back sheet 23 has a laminated structure in which a plurality of sheet members (two sheet members of the first sheet 231 and the second sheet 232 in the present embodiment) are laminated. The first sheet 231 faces the top sheet 21 and the absorbent core 22, and the second sheet 232 has the same shape as the first sheet 231, and the outer surface of the first sheet 231 (that is, the wearer, the top sheet 21, and the absorption) It is joined to the surface opposite to the core 22).

  The absorbent core 22 includes a first absorbent portion 221 that faces the top sheet 21 and a second absorbent portion 222 that faces the back sheet 23. The second absorbent portion 222 and the first absorbent portion 221 are arranged in the thickness direction. Overlaid. The second absorption part 222 has a substantially rectangular shape that is long in the longitudinal direction of the main body part 2, and the first absorption part 221 extends outward in the width direction as compared with the second absorption part 222. In FIG. 1, the outlines of the first absorption part 221 and the second absorption part 222 are drawn with thick broken lines in order to facilitate understanding of the drawing. As shown in FIG. 1, the width | variety of the 1st absorption part 221 in a front part and a back part is larger than the width | variety of the 1st absorption part 221 in a center part. In other words, the 1st absorption part 221 is what is called an hourglass type.

  As shown in FIG. 2, the top sheet 21 is joined to the back sheet 23 via a hot melt adhesive around the absorbent core 22. In addition, an outer portion 33 in the width direction of each side seat 3 (an outer portion in a side seat main body 31 to be described later, hereinafter referred to as “base portion 33”) extends over the entire length in the longitudinal direction of the top sheet 21. It joins to a side edge part and the side edge part of the back sheet 23 via a hot-melt-adhesive. Examples of the hot melt adhesive include polyolefin-based, rubber-based, and vinyl acetate-based adhesives. It should be noted that the bonding between the top sheet 21 and the back sheet 23, the bonding between the side sheet 3 and the top sheet 21 and the back sheet 23, or the bonding between the portions of the side sheet 3 to be described later is an adhesion such as a hot melt adhesive. In addition to using an agent, it may be performed by heat fusion bonding, ultrasonic bonding, or the like.

  The top sheet 21 is a liquid-permeable sheet material that quickly captures the moisture of excrement from the wearer and moves it to the absorbent core 22. The top sheet 21 is, for example, a liquid-permeable nonwoven fabric formed of hydrophobic fibers (polypropylene, polyethylene, polyester, polyamide, nylon, etc.) whose surfaces are hydrophilically treated with a surfactant. Point bond nonwoven fabric, air-through nonwoven fabric, and spunbond nonwoven fabric are used. In addition, as the top sheet 21, a nonwoven fabric (for example, a spunlace nonwoven fabric) formed of hydrophilic fibers such as cellulose, rayon, or cotton may be used.

  The 1st absorption part 221 and the 2nd absorption part 222 of the absorption core 22 are formed with hydrophilic fibers, such as the pulverized pulp fiber and a cellulose fiber. Moisture that has permeated through the top sheet 21 is quickly absorbed by the first absorption unit 221 and held by the first absorption unit 221 and the second absorption unit 222. Tissue paper, liquid permeable nonwoven fabric, and the like that wrap the absorbent material are joined to the absorbent material by a hot melt adhesive to prevent the absorbent material from dropping off (particularly, dropping after water absorption). In addition, the absorption core 22 may be one absorption part formed by what mixed the absorbent material with the hydrophilic fiber.

  As the back sheet 23, 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) formed of hydrophobic fibers, A liquid-impermeable plastic film or a laminated sheet obtained by laminating these non-woven fabrics and a plastic film is used, and the water content of excreta reaching the back sheet 23 may ooze out of the main body 2. Is prevented. In the present embodiment, a plastic film is used as the first sheet 231 of the back sheet 23, and a nonwoven fabric is used as the second sheet 232. From the viewpoint of preventing wear of the auxiliary absorbent 1 and improving the comfort of the wearer, it is preferable to use a plastic film having moisture permeability (breathability) as the first sheet 231.

  As shown in FIGS. 1 and 2, each side sheet 3 includes a side sheet main body 31 and a plurality of (three in the present embodiment) which are joined to the side sheet main body 31 by a hot melt adhesive and extend in the longitudinal direction. Of) elastic members 341, 342, and 343. As described above, the outer portion of the side sheet main body 31 in the width direction (that is, the portion close to the side edge of the main body 2) is the base 33 fixed to the main body 2. On the other hand, an inner portion 32 of the side seat body 31 in the width direction (that is, a portion that is continuous with the base portion 33 on the inner side of the base portion 33 and hereinafter referred to as “side wall portion 32”) is described later. Except for both ends in the longitudinal direction, it is not joined to the top sheet 21 (and other configurations).

  Here, in order to facilitate understanding of the structure of the side wall portion 32 which is a part of the side seat 3, the production of the side seat 3 provided in the auxiliary absorbent 1 will be described with reference to FIG. Actually, a plurality of side sheets 3 are sequentially manufactured using a sheet and an elastic member that are continuous in the direction of the first fold line 41 to be described later. Production of the side sheet 3 will be described using a rectangular sheet and an elastic member corresponding to the side sheet 3.

  When the side sheet 3 is manufactured, a rectangular sheet 4 is prepared as shown in FIG. 4, and a predetermined first folding line 41 (a line parallel to the edge of the sheet 4 is formed on one main surface of the sheet 4. Yes, indicated by a two-dot chain line in FIG. 4), the first elastic member 341 is disposed in an extended state (step S11). Further, the second elastic member 342 is arranged in parallel with the first fold line 41 in a stretched state at a position away from the first fold line 41 on the same main surface of the seat 4 (step S12). Further, a hot melt adhesive is applied to a region 43 (region between the second elastic member 342 and the edge of the sheet 4 on the lower side in FIG. 4) which is indicated by parallel diagonal lines in FIG. 4 (step S13). ). And as shown in FIG. 5, the sheet | seat 4 is folded in half by the 1st fold line 41 so that the 1st elastic member 341 may be pinched | interposed (step S14).

  At this time, the second elastic member 342 is also sandwiched between the folded sheets 4 (hereinafter referred to as “double sheet 4”). Further, except between the first elastic member 341 and the second elastic member 342, approximately the entire sheet in the double sheet 4 is joined by the hot melt adhesive on the region 43. Actually, a hot melt adhesive is applied to the entire first elastic member 341 and the second elastic member 342 (the same applies to the third elastic member 343 described later), and the first elastic member 341 and the second elastic member 342 are applied. The member 342 is bonded (adhered) between the sheets in the double sheet 4.

  When the double sheet 4 is formed by folding the sheet 4 in two at the first fold line 41, the first fold line is formed on one main surface 40 of the double sheet 4 as shown in FIG. A second fold line 42 (shown by a two-dot chain line in FIG. 6) parallel to 41 is set at approximately the center between the first elastic member 341 and the second elastic member 342, and the second fold line On the line 42, the 3rd elastic member 343 is arrange | positioned in the expansion | extension state (step S15). Further, a hot strip is formed on the main surface 40 between the third elastic member 343 and the second elastic member 342 and extends in parallel with the first fold line 41 (regions with parallel diagonal lines in FIG. 6). A melt adhesive is applied (step S16). And as shown in FIG. 7, the double sheet | seat 4 is folded in half by the 2nd fold line 42 (step S17).

  At this time, the double sheet 4 is folded so as to sandwich the third elastic member 343, and the first elastic member 341 and the second elastic member 342 approach each other with the sheet interposed therebetween. Moreover, the mutually opposing site | parts of the main surface 40 are joined in the vicinity of the 1st folding line 41 with the hot-melt-adhesive on the strip | belt-shaped area | region 44 (refer FIG. 6). The side sheet 3 is manufactured by the above processing.

  As shown in FIG. 6, since the hot melt adhesive is not applied to the region between the second fold line 42 and the strip region 44 on the main surface 40, in the side sheet 3 of FIG. A region facing the region (that is, a band-shaped region between the second fold line 42 and the first elastic member 341 in the double sheet 4 in FIG. 6) is not joined to each other. Further, as described above, since the hot melt adhesive is not applied between the first elastic member 341 and the second elastic member 342 in the sheet 4 of FIG. 4, the second folding of the double sheet 4 of FIG. In the vicinity of the tatami wire 42, one sheet and the other sheet of the double sheet 4 are not joined to each other.

  As described above, in practice, the plurality of side sheets 3 are manufactured in the state of a continuous sheet (long sheet) in which the plurality of sheets 4 are continuous in the direction of the first fold line 41, and the plurality of main bodies are manufactured. The continuous sheet of the side sheet 3 is joined on both sides of the continuous sheet in which the portion 2 is continuous in the longitudinal direction. And a continuous sheet | seat is cut | disconnected sequentially in the shape corresponding to the auxiliary absorber 1, and the auxiliary absorber 1 is manufactured.

  As the sheet 4 serving as the side sheet body 31, for example, a water-repellent or liquid-impervious nonwoven fabric (spunbond nonwoven fabric, melt blown nonwoven fabric, SMS nonwoven fabric, etc.) formed of hydrophobic fibers is used. As the first to third elastic members 341 to 343, for example, a polyurethane thread, a strip-shaped polyurethane film, a thread-shaped or strip-shaped natural rubber, or the like is used, and in this embodiment, the polyurethane thread is used as each elastic member. .

  FIG. 8 is an enlarged view of the vicinity of the left side seat 3 in FIG. 2 and shows a cross section of the auxiliary absorbent 1 at the central portion 302 of the side wall portion 32 in the longitudinal direction. In FIG. 8, the layer 39 of the adhesive adhering to the side sheet 3 is indicated by a bold line. As described above, each side seat main body 31 has the side wall part 32 located in the inner side in the width direction, and the base part 33 located in the outer side.

  The base portion 33 includes a first sheet base portion 331 that extends outward in the width direction, and a second sheet base portion 332 that extends outward in the width direction between the first sheet base portion 331 and the main body portion 2. Approximately the entire surface of the first sheet base 331 is bonded to the second sheet base 332, and approximately the entire surface of the second sheet base 332 is bonded to the main body 2.

  The side wall 32 is folded in two at the second folding line 42 along the longitudinal direction, and the outer side that is folded in two at the second folding line 42 and covers the entire outer surface of the inner sheet 321. A sheet 322 is included. The end on the base 33 side in the inner sheet 321 is continuous with the second sheet base 332, and the end on the base 33 side in the outer sheet 322 is continuous with the first sheet base 331.

  In the central portion 302 of the side wall portion 32, a third elastic member 343 (as will be described later) is substantially on the second fold line 42 (including the vicinity of the second fold line 42) on the inner surface of the inner sheet 321. In order to be located at the free end of the standing side wall portion 32, hereinafter, a “free end elastic member 343” is provided. The free end elastic member 343 is joined to the inner surface of the inner sheet 321 in an extended state.

  Further, in the central portion 302, the first elastic member 341 and the second elastic member 342 are located in the vicinity of both ends of the inner sheet 321 (that is, the connection portion with the outer sheet 322 and the connection portion with the second sheet base portion 332). (As will be described later, since they are positioned at the fixed end of the standing side wall portion 32, hereinafter, they are respectively referred to as "first fixed end elastic member 341" and "second fixed end elastic member 342") along the longitudinal direction. Provided. Specifically, the first fixed end elastic member 341 is disposed on the first fold line 41 (including the vicinity of the first fold line 41) between the inner sheet 321 and the outer sheet 322. . Further, the second fixed end elastic member 342 is disposed between the inner sheet 321 and the outer sheet 322 in the vicinity of the base portion 33. In the side wall portion 32, the root (near the fixed end) of the inner sheet 321 is sandwiched between the first fixed end elastic member 341 and the second fixed end elastic member 342. The first and second fixed end elastic members 341 and 342 are joined to the outer surface of the inner sheet 321 and the inner surface of the outer sheet 322 in an extended state.

  In the side wall portion 32, the inner surfaces of the inner sheet 321 are joined to each other in the vicinity of the base portion 33 (in the vicinity of a fixed end described later) by the hot melt adhesive on the band-like region 44 (see FIG. 6) described above. In other words, a joining region 3211 where the inner surfaces of the inner sheet 321 are joined to each other is provided over substantially the entire length in the longitudinal direction. Further, a non-joining region 3212 where the inner surfaces of the inner sheet 321 are not joined to each other is provided between the joining region 3211 and the free end elastic member 343 over almost the entire length in the longitudinal direction. The area of the non-bonding region 3212 is preferably larger than the area of the bonding region 3211.

  At both ends 301 and 303 (see FIG. 1) of the side wall portion 32 in the longitudinal direction, the outer sheet 322 is bonded onto the main body portion 2, and at the center portion 302 of the side wall portion 32 in the longitudinal direction, the outer sheet 322 is the main body portion 2. Not bonded on top. In the central portion 302, the outer surface of the inner sheet 321 and the inner surface of the outer sheet 322 are not joined to each other except in the vicinity of the fixed end elastic members 341 and 342. Therefore, the outer sheet 322 is not joined to any member in the vicinity of the free end elastic member 343.

  In the side wall portion 32, the free end elastic member 343 extending from the vicinity of one end portion 301 to the vicinity of the other end portion 303 contracts, whereby the inner sheet 321 has the second fold line 42 as a free end in the central portion 302. Stands up from the main body 2. Therefore, in a state where the wearer wears the exterior article with the auxiliary absorbent device 1 attached therein, the pair of side wall portions 32 extending in the longitudinal direction are directed from the main body 2 to the wearer on both sides of the main body 2. It becomes a pair of three-dimensional gathers that stand up and abut near the base of the wearer's leg. Thus, when the free end of the side wall part 32 contacts a wearer, the leakage etc. of excrement from between a wearer and the side wall part 32 are prevented.

  At this time, in the vicinity of the free end of the central portion 302 of the side wall portion 32, a gather is formed only on the inner sheet 321 by the free end elastic member 343. Since the gather is covered by the outer sheet 322, it does not directly contact the wearer's skin. Moreover, in the side wall part 32, when the 1st and 2nd fixed end elastic members 341 and 342 ranging from the vicinity of one end part 301 to the other end part 303 contract, the roots of the inner sheet 321 and the outer sheet 322 ( A gather is formed in the vicinity of the fixed end), and the inner sheet 321 stands firmly from the root.

  As described above, each side wall portion 32 of the auxiliary absorbent device 1 is provided with the inner sheet 321 that is folded in two along the folding line along the longitudinal direction, and the inner sheet 321 is formed at the central portion 302 in the longitudinal direction. By disposing the free end elastic member 343 on the folding line on the inner surface of the inner sheet 321, the inner sheet 321 stands from the main body 2 with the folding line as a free end. In addition, the side wall portion 32 is folded in two along a fold line along the longitudinal direction, and an outer sheet 322 that covers the outer surface of the inner sheet 321 is provided, and the inner sheet 321 and the outer sheet 322 are disposed in the vicinity of the free end. They are not joined to each other. Accordingly, the outer sheet 322 prevents the portion of the sheet joined to the free end elastic member 343 from directly contacting the wearer's skin without depending on the wearing state of the auxiliary absorbent device 1 to the wearer. Further, the pressure on the wearer's skin by the free end elastic member 343 can be reliably relieved. Moreover, the contact with the wearer's skin by the side wall portion 32 can be softened (that is, a gentle feel).

  Further, in the auxiliary absorbent 1, the inner surfaces of the inner sheets 321 are bonded to each other in the bonding region 3211 near the fixed end of the inner sheet 321, and the inner surface of the inner sheet 321 is between the bonding region 3211 and the free end elastic member 343. They are not joined to each other. Thereby, compared with the case where the inner surfaces of the inner side sheet | seat 321 are joined entirely, the contact with the wearer's skin by the side wall part 32 can be made soft.

  In each side wall portion 32, the fixed end elastic members 341 and 342 are provided along the fixed end in the vicinity of the fixed end of the inner sheet 321, so that the side wall portion 32 can be largely erected in the central portion 302. Further, by joining the fixed end elastic members 341 and 342 to the inner sheet 321 and the outer sheet 322, both the inner sheet 321 and the outer sheet 322 are gathered to improve the rigidity at the base of the side wall portion 32. be able to.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made.

  If the inner sheet 321 and the outer sheet 322 are not joined to each other in the vicinity of the free end, the outer surface of the inner sheet 321 and the inner surface of the outer sheet 322 may be partially joined. In this case, it is preferable that the inner sheet 321 and the outer sheet 322 are not joined to each other in a range of 1/3 or more on the free end side in the entire range from the fixed end to the free end of the inner sheet 321. More preferably, the inner sheet 321 and the outer sheet 322 are not joined to each other in a range of 2/3 or more on the free end side.

  In the side wall part 32, the inner surfaces of the inner sheet 321 may be joined to each other throughout. Even in this case, by providing the outer sheet 322, the contact of the side wall 32 with the wearer's skin can be softened to some extent.

  In the auxiliary absorbent 1, the free end elastic member 343 may be joined to the inner sheet 321 only in the vicinity of both end portions 301 and 303 of the side wall portion 32 in the longitudinal direction. Even in this case, the free end elastic member 343 is disposed on the second fold line 42 on the inner surface of the inner sheet 321 in the central portion 302 of the side wall 32, so that the second fold line 42 is used as a free end. The inner sheet 321 can be raised from the main body 2. In such an auxiliary absorbent device 1, the pressure on the wearer's skin by the free end elastic member 343 can be further reduced. Paradoxically speaking, in the auxiliary absorbent 1, the free end elasticity is provided by providing the outer sheet 322 even when the free end elastic member 343 is joined to the inner surface of the inner sheet 321 at the central portion 302. The pressure on the skin of the wearer by the member 343 can be eased.

  In the above-described embodiment, the side seat 3 is placed on the main body 2 so that the first fixed end elastic member 341 on the first fold line 41 is disposed on the inner side of the second fixed end elastic member 342 in the width direction. Although it is joined, as shown in FIG. 9, the side sheet 3 may be joined on the main body 2 such that the first fixed end elastic member 341 is disposed outside the second fixed end elastic member 342. .

  In the auxiliary absorbent 1, the first and second fixed end elastic members 341 and 342 can be omitted, and the side wall portion 32 can be raised to some extent only by the free end elastic member 343. On the other hand, it is preferable that at least one of the first and second fixed end elastic members 341 and 342 is provided in order to make the side wall portion 32 stand up.

  Depending on the design of the auxiliary absorbent 1, the outer sheet 322 may be a laminate of two or more sheet members, and the inner sheet 321 may be a laminate of two or more sheet members.

  Moreover, the side seat | sheet 3 may be manufactured by methods other than the method of FIG. In this case, the side sheet body 31 is not necessarily formed by the single sheet 4, and the side sheet body 31 having the above structure may be formed by partially joining a plurality of sheet members. However, it is preferable that the inner sheet 321 and the outer sheet 322 are one continuous sheet in order to easily manufacture the side sheet 3 and prevent a decrease in wearing feeling due to the joining of the sheet members.

  In the auxiliary absorbent 1, the back sheet 23 may be a single-layer sheet member or a laminate of three or more sheet members.

  The structure of the auxiliary absorbent device 1 according to the above embodiment is, for example, a tape-type disposable diaper that is worn around the waist around a portion that contacts the wearer's stomach and a portion that contacts the back side, The present invention may be applied to a pants-type disposable diaper having a trunk opening at the upper end and a pair of leg openings at the lower end. Thus, the structure of the auxiliary absorbent device 1 may be applied to other absorbent articles such as disposable diapers.

  The configurations in the above-described embodiments and modifications may be combined as appropriate as long as they do not contradict each other.

DESCRIPTION OF SYMBOLS 1 Auxiliary absorber 2 Main body part 3 Side sheet 4 Sheet 21 Top sheet 22 Absorption core 23 Back sheet 32 Side wall part 41 1st folding line 42 2nd folding line 302 Central part 321 Inner sheet 322 Outer sheet 341,342 Fixed end Elastic member 343 Free end elastic member 3211 Joining region S11, S12, S14, S15, S17 Step

Claims (11)

An absorbent article that receives excrement from a wearer,
A substantially sheet-like main body in which an absorbent core is disposed between the back sheet and the top sheet;
A pair of side wall portions extending in the longitudinal direction of the main body portion on both side portions of the main body portion;
With
Each side wall
An inner sheet folded in two along a fold line along the longitudinal direction;
An outer sheet that is folded in two along the fold line along the longitudinal direction and covers the outer surface of the inner sheet;
A free-end elastic member that is disposed on the fold line of the inner surface of the inner sheet at the center in the longitudinal direction and contracts, thereby allowing the inner sheet to stand up from the main body with the fold line as a free end; ,
With
In the vicinity of the free end, the inner sheet and the outer sheet are not joined to each other. The absorbent article according to claim 1,
The absorbent article, wherein the free end elastic member is joined to the inner surface of the inner sheet. The absorbent article according to claim 1 or 2,
In the joining region near the fixed end of the inner sheet, the inner surfaces of the inner sheet are joined together,
The absorbent article, wherein inner surfaces of the inner sheet are not joined to each other between the joining region and the free end elastic member. The absorbent article according to any one of claims 1 to 3,
The absorbent article, wherein the inner sheet and the outer sheet are one continuous sheet. The absorbent article according to any one of claims 1 to 4,
Each said side wall part is further equipped with the fixed end elastic member arrange | positioned along the said fixed end in the fixed end vicinity of the said inner sheet | seat, The absorbent article characterized by the above-mentioned. The absorbent article according to claim 5,
The absorbent article, wherein the fixed end elastic member is disposed between the inner sheet and the outer sheet. The absorbent article according to claim 6,
Each of the side wall portions further includes another fixed end elastic member disposed along the fixed end in the vicinity of the fixed end,
The other fixed-end elastic member is disposed between the inner sheet and the outer sheet, and the inner sheet is sandwiched between the fixed-end elastic member and the other fixed-end elastic member. Sex goods. A method for producing a side sheet provided in an absorbent article,
a) forming a double sheet by folding one sheet in two at the first fold line;
b) disposing an elastic member in an expanded state on a second fold line parallel to the first fold line on the main surface of the double sheet;
c) joining the mutually opposing portions of the main surface in the vicinity of the first fold line while folding the double sheet in half with the second fold line so as to sandwich the elastic member; ,
With
In the vicinity of the second fold line, one sheet and the other sheet of the double sheet are not joined to each other. It is a manufacturing method of the side sheet according to claim 8,
Step a)
a1) arranging another elastic member in an extended state on the first fold line on the sheet;
a2) folding the sheet in half along the first fold line so as to sandwich the other elastic member;
A method for producing a side sheet, comprising: It is a manufacturing method of the side sheet according to claim 9,
The step a) is performed before the step a2).
a3) further comprising the step of disposing another elastic member in a stretched state parallel to the first fold line at a position on the sheet away from the first fold line;
In the step a2), the further elastic member is sandwiched between the two folded sheets. An absorbent article that receives excrement from a wearer,
A substantially sheet-like main body in which an absorbent core is disposed between the back sheet and the top sheet;
A pair of side sheets that are manufactured by the method for manufacturing a side sheet according to any one of claims 8 to 10 and extend in a longitudinal direction of the main body part on both side parts of the main body part,
An absorbent article comprising:

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