JP2019118579A - Underpants type absorbent article - Google Patents

Abstract

To facilitate pulling up an underpants type absorbent article in which a stretchable sheet is provided in a waist part.SOLUTION: An underpants type absorbent article (1) comprises an absorbent core (11A), a first waist part (20) and a second waist part (30). The first waist part (10) has a stretchable sheet (24) and non-stretchable sheets (21,22). The stretchable sheet (24) has one end and the other end along the left-right direction, and the one end of the stretchable sheet (24) is positioned above the other end. The stretchable sheet (24) has a peeled area (241) in which a portion at the one end side is peeled up, and a fixed area (242) in which a portion at the other end side is fixed to the non-stretchable sheets (21,22).SELECTED DRAWING: Figure 5

Description

  The present invention relates to a pant-type absorbent article.

  A pant-type disposable diaper is known as a pant-type absorbent article. In Patent Document 1, the absorbent main body is cross-linked between the front and back body exterior bodies, the widthwise side edges of the front and back body exterior bodies are joined to each other, and the waist opening is formed. An underpants-type disposable diaper is disclosed. In the front body exterior body and the back body exterior body, an elastic material around the waist is fixed in an extended state between the inner sheet and the outer sheet (non-stretchable sheet).

JP 2013-138795

  In Patent Document 1, a string-like stretchable material is exemplified as a waist elastic material. However, by using a stretchable sheet instead, the front and rear body and the outer body (a waist portion) are worn by the wearer. It can be attached to Therefore, the trace of the stretchable material can be made difficult to remain.

  However, when the waist portion is pulled up for wearing the diaper, the finger is less likely to be caught and pulled up in the waist portion provided with the stretchable sheet, as compared with the waist portion provided with the thread-like stretchable material.

  The present invention has been made in view of the above-described conventional problems, and an object thereof is to make it easy to pull up a pants-type absorbent article in which a stretchable sheet is provided in a waist portion.

A main invention for achieving the above object is a pants-type absorbent article having an absorbent core, a first waist part, and a second waist part, which has an up-down direction and a left-right direction. One waist portion has an elastic sheet which expands and contracts in the left and right direction, and a non-elastic sheet laminated on the elastic sheet, and the elastic sheet has one end extending in the left and right direction, and the other The stretchable sheet has an end, and the one end of the stretchable sheet is positioned above the other end, and the stretchable sheet has an area on the side of the one end flipped over and a site on the side of the other end And a fixed area fixed to the non-stretchable sheet.
Other features of the present invention will be apparent from the description of the present specification and the accompanying drawings.

  ADVANTAGE OF THE INVENTION According to this invention, it can be made easy to pull up the underpants-type absorbent article in which the elastic sheet was provided in the waist part.

It is a perspective view of pants type disposable diaper 1 (following "diaper"). It is a top view of diaper 1 of a development and extension state. It is sectional drawing in the II line of FIG. It is a sectional view of belly side waist part 20 in the middle of manufacture. It is a sectional view of belly side waist part 20 of a product state. It is a top view of belly side waist part 20 shown in FIG. It is a figure explaining the modification of the eyelid area | region 241. FIG. 8A and 8B are cross-sectional views of modifications of the ventral torso part 20. FIG. FIG. 20 is a cross-sectional view of a modified example of the ventral-side waist portion 20. FIG. 20 is a cross-sectional view of a modified example of the ventral-side waist portion 20. FIG. 20 is a cross-sectional view of a modified example of the ventral-side waist portion 20.

At least the following matters will be made clear by the present specification and the description of the accompanying drawings.
It is a pants-type absorbent article which has an up-down direction and a left-right direction, and has an absorptive core, a 1st waist part, and a 2nd waist part, and the 1st waist part expands and contracts in the left-right direction. A stretchable sheet, and a non-stretchable sheet laminated on the stretchable sheet, wherein the stretchable sheet has one end along the left-right direction and the other end, and the stretchable sheet One end is positioned above the other end, and the elastic sheet is fixed to the non-elastic sheet by fixing the region on the side of the one end to the curled-back region and the region on the side of the other end It is a pants type absorbent article characterized by having a field.

  According to such a pants-type absorbent article, the stretchable sheet rises in the thickness direction of the first waist part or is folded back in the vertical direction in the flipping area, so that the first waist part where the flipping area is located The thickness of the part of the part increases, and the thickened part becomes a handle, making it easy to pull up the pant-type absorbent article.

  The pants-type absorbent article, wherein the turn-up area is an area in which the region on the one end side of the stretchable sheet is turned up and turned back in the vertical direction. is there.

  According to such a pant-type absorbent article, the thickness of the portion of the first waist portion where the turn-up area is located is increased, and the thickened portion becomes a handle, making it easy to pull up the pant-type absorbent article.

  In the pants-type absorbent article, the turn-up area has an opposite surface facing the stretchable sheet, and the opposite surface of the turn-up area is not fixed to the portion of the stretchable sheet facing It is a pants-type absorbent article characterized by the above.

  According to such a pants-type absorbent article, a space is formed between the turn-up area and the stretchable sheet, and the thickness of the portion of the first waist portion where the turn-up area is located is further increased.

  In the pants-type absorbent article, the turn-up area has an opposite side opposite to the opposite side facing the stretchable sheet, and the opposite side of the turn-up area is the pants-type absorbent article It is not fixed to the sheet which it has, It is a pants type absorbent article characterized by the above-mentioned.

  According to such a pants-type absorbent article, a space is formed between the turn-up area and the sheet, and the thickness of the portion of the first waist portion where the turn-up area is located is further increased.

  In the pants-type absorbent article, the turn-up area has an opposite side opposite to the opposite side facing the stretchable sheet, and the opposite side of the turn-up area is the pants-type absorbent article It is fixed to the sheet which it has, It is a pants type absorbent article characterized by the above-mentioned.

  According to such a pants-type absorbent article, the rigidity of the portion of the first waist portion where the turn-up region is located is enhanced, and the user can easily hold the portion.

  In the pants-type absorbent article, the first waistline portion in the left-right direction in a state where the region on the one end side of the stretchable sheet is folded back in the up-down direction to form the turn-up region. And a side end of the second waist portion in the left-right direction are welded.

  According to such a pants-type absorbent article, it is possible to maintain the folding of the stretchable sheet in the turn-up region, and to maintain the thickness of the portion of the first waist portion where the turn-up region is located.

  Such a pants-type absorbent article, comprising a fixing portion for fixing the stretchable sheet to the non-stretchable sheet, the fixing portion having one end along the left-right direction and the other end, The one end of the fixing portion is located above the other end, and the portion on the one end side of the fixing portion is not folded downward.

  According to such a pants-type absorbent article, the layer of the fixing portion becomes one layer at the upper end of the first waist portion, and the upper end of the first waist portion can be softened to stimulate the wearer's skin. Can be prevented.

  In such a pants-type absorbent article, the stretchable sheet is folded back in the vertical direction at a fold line along the lateral direction, and the turn-up area is a portion of the stretchable sheet folded at the fold line On the other hand, in the pants-type absorbent article, the region on the one end side of the stretchable sheet is a region turned up and down in the vertical direction.

  According to such a pant-type absorbent article, the thickness of the portion of the first waist part where the turn-up region is located is further increased by the stretchable sheet being folded back in a plurality of times.

=== Embodiments ===
Hereinafter, as a pants-type absorbent article according to the present invention, an embodiment will be described by taking a disposable diaper for infants as an example. However, the pants-type absorbent article according to the present invention is not limited to disposable diapers for infants, and can also be used as disposable diapers for adults, menstrual shorts, and the like.

=== Configuration of pants type disposable diaper 1 ===
FIG. 1 is a perspective view of a shorts-type disposable diaper 1 (hereinafter, "diaper"). FIG. 2 is a plan view of the diaper 1 in the unfolded and stretched state. FIG. 3 is a cross-sectional view taken along line II of FIG.

  The diaper 1 has a vertical direction and a horizontal direction in the pants-type state shown in FIG. 1, and the waist opening BH and the pair of leg openings LH are formed. In the vertical direction, the waist opening BH side is the upper side, and the crotch side is the lower side. Further, as shown in FIG. 3, the direction in which the materials constituting the diaper 1 are stacked is referred to as the thickness direction, and the side in contact with the wearer in the thickness direction is referred to as the skin side, and the side not in contact with the wearer. It is called the non-skin side.

  Moreover, the diaper 1 has the absorptive main body 10, the ventral waistline part 20, and the back waistline part 30 which are three members of rectangular shape planar view. The ventral torso 20 is applied to the ventral side of the wearer and the dorsal torso 30 is applied to the dorsal side of the wearer.

  In the diaper 1 in the unfolded state shown in FIG. 2, the ventral-side waist portion 20 and the back-side waist portion 30 are arranged such that their longitudinal direction is along the left-right direction of the diaper 1. The end of the absorbent main body 10 on one side in the longitudinal direction is disposed at the center of the ventral-side waist portion 20 in the left-right direction, and the length of the absorbent main body 10 is at the center of the back-side waist portion 30 in the left-right direction. The other end of the direction is disposed.

  In the diaper 1 in the unfolded state shown in FIG. 2, the absorbent main body 10 is folded in half at the approximate center of the longitudinal direction so that the longitudinal direction of the absorbent main body 10 follows the vertical direction of the diaper 1. Both ends of the ventral waist portion 20 and both ends of the back waist portion 30 are joined by thermal welding, ultrasonic welding or the like to form a pair of joint regions 2 as shown in FIG. It becomes diaper 1 of a pants type state.

  As shown in FIG. 3, the absorbent main body 10 is disposed on the non-skin side of the absorbent body 11, the liquid-permeable top sheet 12 disposed on the skin side of the absorbent body 11, and the absorbent body 11. It has a liquid-impermeable back sheet 13 and an exterior sheet 14 disposed on the non-skin side of the back sheet 13.

  Absorbent body 11 has absorptive core 11A which absorbs and holds waste fluid, such as urine, and liquid permeable core wrap sheet 11B which covers absorptive core 11A. Examples of the absorbent core 11A include those in which a liquid absorbent fiber such as pulp containing a high absorbent polymer (SAP) is molded into a predetermined shape.

  Moreover, as shown in FIG. 2, the leg elastic member 15 is provided in the both sides of the absorptive main body 10 in the left-right direction, and the diaper 1 fits around a leg of a wearer. The leg elastic members 15 are, for example, fixed in a stretched state in the longitudinal direction of the absorbent main body 10 between the exterior sheet 14 which is folded back inward in the left-right direction to form two layers. As the leg elastic member 15, a thread-like elastic member or a stretchable sheet can be exemplified.

  The ventral-side waist portion 20 and the back-side waist portion 30 are, as shown in FIG. 3, respectively, inner layer sheets 21 and 31, outer layer sheets 22 and 32 laminated on the inner layer sheets 21 and 31, and a plurality of filamentous elastic members 23 and 33.

  The outer layer sheets 22 and 32 are arranged on the non-skin side of the inner layer sheets 21 and 31. The inner layer sheets 21 and 31 and the outer layer sheets 22 and 32 are disposed on the non-skin side of the absorbent main body 10. However, the upper ends 221 and 321 of the outer layer sheets 22 and 32 are folded downward to cover the longitudinal ends of the absorbent main body 10 from the skin side.

  The inner layer sheets 21 and 31 and the outer layer sheets 22 and 32 alone are non-stretchable sheets that do not substantially have stretchability in the left-right direction of the diaper 1. Use SMS non-woven fabric (spun-bond / melt-blown / spun-bond non-woven fabric), spun-bond non-woven fabric, air-through non-woven fabric, plastic sheet, apertured plastic sheet, and laminate sheets thereof as inner layer sheets 21 and 31 and outer layer sheets 22 and 32 Can.

  The plurality of thread-like elastic members 23 and 33 are arranged in the vertical direction between the inner layer sheets 21 and 31 and the outer layer sheets 22 and 32, and fixed in an extended state in the horizontal direction. Therefore, the ventral waist part 20 and the back waist part 30 expand and contract in the left-right direction, and fit around the wearer's waist. As the thread-like elastic members 23, 33, thread-like elastic members such as rubber and spandex can be exemplified.

  In the back waist part 30, the thread-like elastic member 33 is disposed from the upper end to the lower end. On the other hand, the thread-like elastic member 23 is not disposed at the upper end portion of the ventral-side waist portion 20, and instead, the stretchable sheet 24 which is expanded and contracted in the left-right direction is disposed. In the present embodiment, the lower end portion of the stretchable sheet 24 and the thread-like elastic member 23 are arranged to overlap in the vertical direction, but they do not have to overlap.

  As described above, by arranging the stretchable sheet 24 without disposing the thread-like elastic member 23 at the upper end of the ventral waist part 20, the upper end of the ventral waist part 20 is in close contact with the wearer on the surface. Therefore, local tightening can be suppressed, and traces of the expansion and contraction member can be made difficult to remain. In particular, since the abdomen of an infant is popping out, it is preferable to suppress the tightening of the ventral torso part 20.

  In addition, the stretchability of the upper end of the waist portion 20, 30 greatly influences the ease of opening the waist opening BH when the diaper 1 is worn. The stretchable sheet 24 has a property of being easily stretched from the natural state and difficult to shrink from the stretched state. Therefore, by arranging the stretchable sheet 24 at the upper end of the ventral waist portion 20, the waist opening BH can be easily spread when the diaper 1 is worn, and after the waist portions 20 and 30 are fitted to the wearer. It can prevent the tightening of the abdomen.

The stretchable sheet 24 may be, for example, various types such as spunbonded non-woven fabric, air-through non-woven fabric, needle punched non-woven fabric, etc. composed of elastic fibers having a mass of 10 to 40 g / m ² , more preferably 15 to 30 g / m ^2. A stretchable non-woven fabric produced by a known method can be used. The elastic fiber is made of a thermoplastic elastomer, rubber or the like as a raw material, and particularly when a thermoplastic elastomer is used as a raw material, melt spinning using an extruder is possible like an ordinary thermoplastic resin. Also, the fibers thus obtained are easily heat-sealed and are suitable as stretchable non-woven fibers. Examples of the thermoplastic elastomer include styrene-based elastomers, olefin-based elastomers, polyester-based elastomers, and polyurethane-based elastomers. These can be used singly or in combination of two or more. The stretchable sheet may be any one that exhibits elasticity at least in the left-right direction, and may exhibit elasticity in two or more directions. The stretching ratio in the left-right direction of the stretchable sheet 24 is preferably about 1.2 times to 3.0 times.

=== End on the side of the waist opening BH of the elastic sheet 24 ===
FIG. 4 is a cross-sectional view of the ventral-side waist part 20 in the process of manufacturing. FIG. 5 is a cross-sectional view of the ventral torso part 20 in the product state. 6 is a plan view of the ventral torso part 20 shown in FIG. 4 and 5 are diagrams schematically showing the configuration of the ventral-side waist portion 20, and the thickness of the ventral-side waist portion 20 is drawn thick. The same applies to the sectional views described later. Moreover, in FIG. 6, the thread-like elastic member 23 is omitted.

  As described above, the belly-side waist portion 20 includes the inner layer sheet 21, the outer layer sheet 22, and the stretchable sheet 24. In the state in the middle of manufacture (FIG. 4), the outer layer sheet 22, the inner layer sheet 21, and the elastic sheet 24 are laminated in order from the non-skin side in the thickness direction.

  Each of the inner layer sheet 21, the outer layer sheet 22, and the stretchable sheet 24 has one end 21a, 22a, 24a and the other end 21b, 22b, 24b extending along the left-right direction, as shown in FIG. In the product state (FIG. 5), one end 21a, 22a, 24a of each sheet is located above the other end 21b, 22b, 24b.

  The inner layer sheet 21 and the outer layer sheet 22 are joined by an adhesive (not shown) applied therebetween. The inner layer sheet 21 and the outer layer sheet 22 correspond to the non-stretchable sheet of the present invention. Hereinafter, the inner layer sheet 21 and the outer layer sheet 22 are collectively referred to as a non-stretchable sheet.

  In the state in the middle of manufacture (FIG. 4), the stretchable sheet 24 and the outer layer sheet 22 extend above the inner layer sheet 22. Further, the outer layer sheet 22 extends above the stretchable sheet 24.

  In the product state (FIG. 5), the outer layer sheet 22 is folded downward with the position of the one end 21 a of the inner layer sheet 21 as the folding position F. The portion 221 of the outer layer sheet 22 folded back covers the longitudinal end of the absorbent main body 10 from the skin side. Further, the portion 221 of the outer layer sheet 22 which has been folded back is fixed to the stretchable sheet 24 and the absorbent main body 10 by the adhesive 42.

  In addition, an adhesive 41 such as a hot melt adhesive is applied between the non-stretchable sheet (the inner layer sheet 21 and the outer layer sheet 22) and the stretchable sheet 24. The stretchable sheet 24 is fixed to the non-stretchable sheets 21 and 22 by the adhesive 41. As shown in FIG. 6, the application region of the adhesive 41 is a rectangular region in plan view. Hereinafter, the application region of the adhesive 41 is also referred to as a fixing portion 41.

  The adhesive 41 may be partially applied to the application region of the adhesive 41, or the adhesive 41 may be applied to the entire region. Examples of the application pattern of the adhesive 41 may include known patterns such as a stripe pattern, a spiral pattern, and an Ω pattern. Further, the planar shape of the application region of the adhesive 41 is not limited to the rectangular shape. The fixing portion is not limited to the adhesive 41, and may be a welding area in which the stretchable sheet 24 is fixed to the non-stretchable sheets 21 and 22 by heat welding, ultrasonic welding, or the like.

  As shown in FIG. 6, the fixing portion 41 has one end 41a and the other end 41b extending in the left-right direction. In the product state (FIG. 5), one end 41a of the fixing portion 41 is located above the other end 41b.

  By the way, although the stretchable sheet 24 is provided at the upper end portion of the ventral-side waist portion 20, the thread-like elastic member 23 is not provided. The area in which the stretchable sheet 24 is provided is smaller and smoother than the area in which the thread-like elastic member 23 is provided. Therefore, when the user holds and holds the ventral torso part 20 at the time of wearing the diaper 1, it is difficult for the finger to be caught and to be pulled up.

  Therefore, it is preferable that the fixing portion 41 does not straddle the end 24 a of the stretchable sheet 24 in the vertical direction. That is, it is preferable that the fixing portion 41 is not provided at a portion on the side of the one end 24 a of the stretchable sheet 24. Specifically, when the stretchable sheet 24 is fixed to the non-stretchable sheets 21 and 22 (FIG. 4), one end 24a of the stretchable sheet 24 may be extended above the one end 41a of the fixing portion 41. . By doing so, the site | part by the side of the end 24a of the elastic sheet 24 is turned up in the middle of manufacture by the contraction force which the elastic sheet 24 has.

  This is because during the process after fixing the stretchable sheet 24 to the non-stretchable sheets 21 and 22 in the manufacturing process of the diaper 1, a slight difference occurs in the way tension is applied to the stretchable sheet 24, and the stretchable sheet The local contraction of 24 is considered to result in turning up. In addition, it is considered that the sheet is flipped even when the stretchable sheet 24 is spread and returned in the width direction intersecting the stretch direction of the stretchable sheet 24.

  That is, in the product state (FIG. 5), the stretchable sheet 24 has a “folded area 241” in which the site on one end 24a side is flipped and the non-stretchable sheet 21 at the site on the other end 24b 22 and a "fixed region 242". Specifically, the comeback area 241 is an area where the stretchable sheet 24 is flipped from the one end 41a (upper end) of the fixed part 41, and the part of the stretchable sheet 24 that contacts the one end 41a of the fixed part 41. It is a region from 24 c to one end 24 a of the elastic sheet 24.

  The fixing portion 41 shown in FIG. 5 is provided straddling the other end 24 b (lower end) of the stretchable sheet 24 in the vertical direction. Therefore, the site | part of the other end 24b side of the elastic sheet 24 is not turned up. Therefore, in the case of FIG. 5, the region from the portion 24 c of the stretchable sheet 24 in contact with the one end 41 a of the fixed portion 41 to the other end 24 b of the stretchable sheet 24 is a fixed region 242.

  However, the present invention is not limited to the above, and the fixing portion 41 may not be provided at a portion on the other end 24 b side of the stretchable sheet 24. That is, the site | part by the side of the other end 24b of the elastic sheet 24 may be turned up similarly to the site | part by the side of the one end 24a.

  At the portion of the ventral-side waist portion 20 where the blind area 241 is located, the thickness is increased as much as the stretchable sheet 24 is folded back, and the finger is easily caught at the thickened portion. That is, the thickened part becomes a handle and it becomes easy to pull up the diaper 1 (the waist parts 20 and 30).

  In particular, the foldable area 241 is not formed by folding back the elastic sheet 24 in the folding step of the manufacturing method of the diaper 1, but is formed by folding back the elastic sheet 24 by the contraction force of the elastic sheet 24. Be done. Therefore, as shown in FIG. 5 etc., the upper end portion of the stretchable sheet 24 is folded back so as to be curved. That is, the upper end portion of the stretchable sheet 24 is curled. Therefore, the flipped area 241 is easily floated with respect to the fixed area 242, and a space is formed between the flipped area 241 and the fixed area 242. Thus, the portion of the ventral torso 20 where the turned-up area 241 is located is thick enough to be easily grasped by the user.

  In addition, the user generally holds the upper end portions of the waist parts 20 and 30 and pulls up the diaper 1. Therefore, it is preferable that a portion on one end 24 a side of the stretchable sheet 24 (that is, an end on the side of the waist opening BH) be turned up. In the case where the stretchable sheet 24 is provided at the upper end of the ventral waist portion 20 as in the diaper 1 of the present embodiment, the thickness of the ventral waist portion 20 of the portion easily grasped by the user is It can be thickened.

  When the stretchable sheet 24 is provided at the upper end portion of the ventral-side waist portion 20, at least a part of the stretchable sheet 24 is from the center CL (see FIG. 5) of the ventral-side waist portion 20 in the vertical direction. Is also located at the top. More preferably, all of the stretchable sheets 24 may be located above the center CL of the ventral waist portion 20.

  FIG. 7 is a view for explaining a modification of the turning area 241. As shown in FIG. The blind area 241 is not limited to the one in which the portion on the end 24 a side of the stretchable sheet 24 is folded back as shown in FIG. 5. As shown in FIG. 7, the area of the end of the stretchable sheet 24 on the side of the end 24a of the stretchable area 24 may be turned up and may rise in the thickness direction, as shown in FIG. Also in this case, the thickness of the portion of the ventral-side waist portion 20 where the turn-up area 241 is located is increased, and the diaper 1 can be easily pulled up.

  Further, as shown in FIG. 5, the curled-down downward fold-back wrinkled area 241 has an opposing surface 241 a that faces the portion of the elastic sheet 24 that has not been curled-up. And it is preferable that the opposing surface 241a of the turning area | region 241 is not being fixed to the site | part of the elastic sheet 24 which opposes. In FIG. 5, the facing surface 241 a of the turning area 241 is not fixed to the skin side surface of the fixed area 242.

  That is, it is preferable that the stretchable sheets 24 are not fixed by an adhesive or the like. By doing so, a space is formed between the facing surface 241 a of the turn-up area 241 and the elastic sheet facing it. Therefore, the thickness of the part of belly side waist part 20 in which turning area 241 is located further increases, and it becomes easy to pull up diaper 1.

  Further, as shown in FIG. 5, the turn-up area 241 has an opposite side surface 241 b opposite to the opposite surface 241 a facing the stretchable sheet 24. It is preferable that the opposite side surface 241 b of the turn-up area 24 is not fixed to the sheet of the diaper 1. In FIG. 5, the opposite side surface 241 b of the turn-up area 241 is not fixed to the non-skin screen of the outer layer sheet 22 folded back downward with an adhesive or the like.

  By doing so, a space is also formed between the opposite surface 241b of the turn-up area 241 and the sheet (here, the outer layer sheet 22) opposite thereto. Therefore, the thickness of the part of belly side waist part 20 in which turning area 241 is located further increases, and it becomes easy to pull up diaper 1.

  The configuration of the belly-side waist portion 20 is not limited to that shown in FIG. For example, a configuration in which the inner layer sheet 21 is also folded downward along with the outer layer sheet 22, a configuration in which only the inner layer sheet 21 is folded downward, or a configuration in which the inner layer sheet 21 and the outer layer sheet 22 are not folded downward Or the like. Therefore, the sheet to which the opposite side surface 241b of the turn-up area 241 faces is not limited to the outer layer sheet 22, and may be the inner layer sheet 21 folded downward, another sheet other than the non-stretchable sheets 21 and 22, etc. It is also good.

  Moreover, the underpants type diaper 1 has a pair of joining area | regions 2 by which the both-ends part of the ventral-side waist part 20 and the both-ends part of the back side waist part 30 in the left-right direction were joined by welding. As shown in FIG. 6, the stretchable sheet 24 may be extended to the outside of the formation position of the bonding area 2 in the left-right direction. And it is preferable that the joining area | region 2 is formed in the state in which the site | part by the side of the one end 24a of the elastic sheet 24 is turned up and down, and the turning-up area | region 241 is formed. By doing so, the folding (curling) of the flipping area 241 is maintained. Thus, it is possible to maintain the thickness of the portion of the ventral torso region 20 where the turned-up area 241 is located.

  Moreover, although the site | part by the side of the one end 24a of the elastic sheet 24 is folded back downwards and the turning area | region 241 is formed, the site | part by the side of the one end 41a of the fixing | fixed part 41 is not folded downward. .

  Therefore, in the upper end portion of the ventral-side waist portion 20, the layer of the fixing portion 41 becomes one layer, and the upper end portion of the ventral-side waist portion 20 is soft. If the upper end of the ventral waist portion 20 is soft, it can be prevented that the upper end (edge) of the ventral waist portion 20 stimulates the skin of the wearer. Further, in the natural state of the diaper 1, the upper end portion of the ventral waistline portion 20 is likely to be frilled. Therefore, the user can have the impression that the diaper 1 is soft and comfortable to wear.

=== Modifications ===
8A and 8B are cross-sectional views of modifications of the ventral torso part 20. FIG. FIG. 8A is a view of the ventral waist portion 20 in the process of manufacturing, and FIG. 8B is a view of the ventral waist portion 20 in the product state. The stretchable sheet 24 may be fixed by the fixing portion 41 to the portion 221 of the outer layer sheet 22 which is folded downward as in the ventral-side waist portion 20 of FIG. 8B.

  In this case, the lower end 24 a of the stretchable sheet 24 becomes the one end 24 a of the stretchable sheet 24 in the state in the middle of the production (FIG. 8A). Therefore, the fixing portion 41 may be provided above the one end 24 a (lower end) of the stretchable sheet 24. By doing so, a part on the side of the one end 24 a of the stretchable sheet 24 is flipped up by the contraction force of the stretchable sheet 24 in the middle of production, and a flipped up area 241 is formed. Therefore, the thickness of the part of belly side waist part 20 in which turning up area 241 is located increases, and it becomes easy to pull up diaper 1.

  9 to 11 are cross-sectional views of modifications of the ventral-side waist portion 20. FIG. In the belly-side waist part 20 of FIG. 5 described above, the upper end of the stretchable sheet 24 and the upper end (one end 41 a) of the fixing part 41 are located up to the upper end 20 a of the belly-side waist part 20.

  9 and 10, the upper end of the stretchable sheet 24 and the upper end (one end 41a) of the fixing portion 41 are lower than the upper end 20a of the ventral-side waist portion 20. positioned. That is, in the upper end portion of the ventral-side waist portion 20, there is a region in which the stretchable sheet 24 and the fixing portion 41 are not located. Therefore, in the ventral-side waist portion 20 of FIG. 9 and FIG. 10, the upper end is softer than the vent-side waist portion 20 of FIG. Therefore, it can prevent that a wearer's skin is stimulated by the upper end (edge) 20a of belly side waist part 20, and diaper 1 has the impression that it is soft and comfortable to wear to the user. You can get it.

  Further, in the belly-side waist portion 20 of FIG. 10, the adhesive 42 provided on the portion 221 of the outer layer sheet 22 folded back downward is opposed to the turning-up area 241. Therefore, the opposite side surface 241b of the turn-up area 241 is fixed by the adhesive 42 to the portion 221 of the outer layer sheet 22 folded back downward.

  Thus, the opposite side surface 241b of the turning area 241 may be fixed to the sheet of the diaper 1. By doing so, the rigidity of the portion of the ventral torso region 20 where the turning up area 241 is located can be enhanced. Therefore, the user can easily grasp the thickened area 241 and pull up the diaper 1 easily. Note that at least a part of the opposite side surface 241b of the turn-up area 241 may be fixed to the sheet.

  In the ventral-side waist portion 20 of FIG. 11, the portion on one end 24 a side of the stretchable sheet 24 is folded downward along with the outer layer sheet 22 and the fixing portion 41 along the folding line F along the left-right direction of the diaper 1 . That is, the method of manufacturing the diaper 1 includes the step of folding the stretchable sheet 24 downward. And the fixing | fixed part 41 is not provided in the site | part (end part) at the side of the one end 24a of the elastic sheet 24. As shown in FIG. Therefore, the portion on the side of the one end 24 a of the stretchable sheet 24 is turned up with respect to the portion of the stretchable sheet 24 folded back at the folding line F and is folded upward.

  Therefore, the number of laminated flexible sheets 24 in the turn-up area 241 is three. Therefore, in the belly-side waist portion 20 of FIG. 11, the thickness of the belly-side waist portion 20 is further increased by the amount by which the stretchable sheet 24 is folded back twice, and it becomes easy to pull up the diaper 1.

  Further, in the ventral-side waist portion 20 of FIG. 11, both sides (non-skin side and skin side) of the turn-up area 241 face the stretchable sheet 24 respectively. And both sides of the turning area 241 are not fixed to the part of elastic sheet 24 which each opposes. Therefore, a space is formed between the non-skin side of the turning area 241 and the portion of the elastic sheet 24 which is not folded back, and the elastic side of the turning area 241 and the elastic side folded back at the folding line F A space is also formed between the 24 sites. Therefore, the thickness of the part of belly side waist part 20 in which turning area 241 is located further increases, and it becomes easy to pull up diaper 1.

  In addition, the manufacturing method of the diapar 1 may be twice or more the process of folding up the site | part by the side of the end 24a of the elastic sheet 24 to an up-down direction. In that case, the number of stacked elastic sheets 241 in the turn-up area 241 is increased by the number of times of turn-back, and the thickness of the ventral-side waist portion 20 is increased.

=== Other Embodiments ===
As mentioned above, although embodiment of this invention was described, said embodiment is for making an understanding of this invention easy, and is not for limiting and interpreting this invention. Further, it goes without saying that the present invention can be modified or improved without departing from the gist thereof, and that the present invention includes equivalents thereof.

  In the above embodiment, the ventral waist portion 20 has the stretchable sheet 24, the ventral waist portion 20 corresponds to the first waist portion of the present invention, and the back waist portion 20 is the second waist portion of the present invention. It corresponds to, but it is not limited to this. For example, a mode in which the back waistline portion 20 has an elastic sheet 24, the back waistline portion 30 corresponds to a first waistline portion of the present invention, and the belly side waistline portion 20 corresponds to a second waistline portion of the present invention May be. In addition, the second waist portion of the present invention may have a stretchable sheet, and both the ventral waist portion 20 and the back waist portion 30 may have a stretch sheet. In that case, the stretchable sheet of the second waist part (the stretch sheet of either the ventral waistline 20 or the back waistline 30) has an area on one end side that is torn off It may or may not have.

  In the above embodiment, the stretchable sheet 24 is disposed at the upper end portion of the ventral-side waist portion 20. However, the present invention is not limited to this. The stretchable sheet 24 may be located at any position of the ventral-side waist portion 20 in the vertical direction. May be arranged.

  In the above embodiment, the ventral waistline portion 20 and the back waistline portion 30 are separated as the pants-type absorbent article, and the three members of the ventral waistline portion 20, the back waistline portion 30, and the absorbent main body 10 Although the so-called 3 piece type diaper which it has is illustrated, it does not restrict to this. For example, an outer covering member in which the ventral waist portion 20 and the back waist portion 30 are formed as one continuous member via a crotch portion, and the ventral waist portion 20 and the back waist portion 30 are integrated; It may be a so-called two-piece type diaper having two members of an elastic main body.

1 diaper (pants-type absorbent article), 2 bonding area,
10 Absorbent body, 11 Absorbent body,
11A absorbent core, 11B core wrap sheet,
12 top sheets, 13 back sheets,
14 exterior sheet, 15 elastic members around,
20 ventral waistline (first waistline),
21 inner layer sheet (non-stretchable sheet), 22 outer layer sheet (non-stretchable sheet),
23 thread elastic members, 24 elastic sheet,
30 back waist (second waist), 31 inner layer sheet,
32 outer layer sheet, 33 thread-like elastic member,
41 fixed part (adhesive), 42 adhesive, F fold line

Claims (8)

Have vertical and horizontal directions,
A pant-type absorbent article having an absorbent core, a first waist and a second waist, comprising:
The first waist part has an elastic sheet which expands and contracts in the left-right direction, and a non-elastic sheet laminated on the elastic sheet,
The stretchable sheet has one end along the lateral direction, and the other end.
The one end of the stretchable sheet is positioned above the other end,
The stretchable sheet has a pants-shaped absorption characterized in that a part on the side of the one end is turned over and a fixed area in which a part on the side of the other end is fixed to the non-stretchable sheet. Sex goods. The pants-type absorbent article according to claim 1, wherein
The pants-type absorbent article, wherein the turn-up area is an area in which a portion on the side of the one end of the stretchable sheet is turned up and folded back in the vertical direction. The pants-type absorbent article according to claim 2, wherein
The turn-up area has an opposing surface facing the elastic sheet,
The pants-type absorbent article, wherein the opposite surface of the turn-up area is not fixed to a portion of the elastic sheet facing the other. The pants-type absorbent article according to claim 2 or 3, wherein
The turn-up area has an opposite side opposite to the opposite side facing the elastic sheet,
The pants-type absorbent article, wherein the opposite side of the turn-up area is not fixed to a sheet of the pants-type absorbent article. The pants-type absorbent article according to claim 2 or 3, wherein
The turn-up area has an opposite side opposite to the opposite side facing the elastic sheet,
The pants-type absorbent article, wherein the opposite side of the turn-up area is fixed to a sheet of the pants-type absorbent article. The pants-type absorbent article according to any one of claims 2 to 5, wherein
In a state in which a portion on the side of the one end of the stretchable sheet is folded back in the vertical direction to form the turned-up area,
A pants-type absorbent article, wherein the both side ends of the first waist part in the left and right direction and the both ends of the second waist part in the left and right direction are welded. The pants-type absorbent article according to any one of claims 2 to 6, wherein
And a fixing portion for fixing the stretchable sheet to the non-stretchable sheet,
The fixing portion has one end along the lateral direction and the other end.
The one end of the fixing portion is located above the other end,
The part of the said one end side of the said fixing | fixed part is not folded downward, The underpants-type absorbent article characterized by the above-mentioned. The pants-type absorbent article according to any one of claims 2 to 7, wherein
The stretchable sheet is folded up and down at a fold line along the lateral direction,
The flipping region is a region in which a portion on the one end side of the stretchable sheet is flipped back and forth in the vertical direction with respect to a portion of the stretchable sheet folded back at the folding line. Pants type absorbent article.

Images