JP2008119416A - Disposable absorbent article - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a disposable absorbent article which can improve a wearing touch and a close fitness around the user's crotch. <P>SOLUTION: A first crotch elastic area 32 is tightly attached to the crotch part of a wearer by a first crotch elastomer 31 mounted on the crotch flap part 13 of the crotch part 7 of a diaper body 2. A second crotch elastic area 34 tightly attaches both sides of an absorbent 5 inward from the crotch part of the wearer with the second crotch elastomer 33 disposed on the position overlapping both sides of the absorbent 5. With the first and second crotch elastomers 31 and 33, the adhesion can be improved at the crotch part 7 of the diaper body 2. The leak from the crotch part 7 of the diaper body 2 can be prevented. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a disposable absorbent article for children, adults or incontinence.

  Conventionally, as a disposable diaper as a disposable absorbent article of this type, an absorbent body is disposed between a top sheet and a back sheet, and the back waist part, the crotch part, and the abdomen waist part are successively connected. The diaper main body as an absorbent article main body formed as described above is provided. The both side edges of the crotch part of the diaper body are cut out in a substantially concave shape toward the inside, and the side edges of the crotch part in the width direction are elastically stretchable along these side edges. Members are provided to form a leg gather.

Furthermore, as this kind of disposable diaper, an absorbent body is disposed so as to overlap both sides of the crotch part of the diaper body. And the leg elastic member for forming a leg gather is arrange | positioned by the circular arc shape toward the area | region which hits a groin part from the area | region which hits a wearer's body side at the time of wear in the both sides of this crotch part. Further, the crotch elastic members that contract in conjunction with the contraction of the leg elastic members are connected to the leg elastic members and arranged in an arc shape so as to overlap both side edges in the width direction of the absorber. (For example, refer to Patent Document 1).
JP 2004-49763 A

  However, in the disposable diaper, since the arc-shaped leg elastic member and the crotch elastic member are arranged so as to overlap each other at the crotch, the leg elastic member and the crotch elastic member are respectively extended. Is obstructed by the absorbent body, the adhesion to the crotch area is not sufficient, which may cause leakage.

  Further, the region surrounded by the leg elastic member and the crotch elastic member of the absorbent body is formed so as to bend outward when worn and hit the thigh from the groin portion of the wearer. Since the main body is folded and mounted, the thickness of the diaper at the crotch portion is increased, and there is a problem that the mounting feeling is not good.

  This invention is made | formed in view of the said problem, and provides the disposable absorbent article which can improve the adhesiveness and wearing feeling in a crotch part.

  The disposable absorbent article of the invention according to claim 1 has a top sheet positioned on the inner surface side, a back sheet positioned on the outer surface side, and an absorbent body disposed between the top sheet and the back sheet. A back side waist part, a crotch part and an abdomen waist part are formed integrally in order along the longitudinal direction, and the back sheet is positioned on the side facing the absorber. A liquid-impervious sheet and an outer sheet positioned on the opposite side of the side facing the absorber, and the crotch part has a widthwise side portion of the crotch part substantially facing inward. The absorbent body is formed in a concave shape, and both side portions of a portion located in the crotch portion of the absorbent body are formed in a substantially concave shape toward the inside, and both sides in the width direction of the crotch portion of the absorbent article main body. The part has a substantially concave extending outward from both side edges in the width direction of the absorber. A crotch flap portion is formed along the longitudinal direction, and a first crotch around elastic body is disposed along the longitudinal direction between the top sheet and the back sheet of the crotch flap portion, so that the first crotch around An elastic region is formed, and at a position overlapping the absorber on the inner side in the width direction of the first inseam elastic region, a first portion along the longitudinal direction is provided between the liquid-impermeable sheet and the outer sheet of the back sheet. A second inseam elastic body is formed by disposing a second inseam elastic body.

  The disposable absorbent article according to a second aspect of the present invention is the disposable absorbent article according to the first aspect, wherein the crotch part is a plurality of second inseam elastic bodies extending from the position overlapping the absorber to the crotch flap part. Is provided.

  The disposable absorbent article according to a third aspect of the present invention is the disposable absorbent article according to the first or second aspect, wherein the longitudinal length of the second inseam elastic body is the same as the longitudinal direction of the first inseam elastic body. The third inseam elastic body is disposed shorter than the length from the end on the back waistline side of the second inseam elastic body toward the outside in the longitudinal direction and the width direction on the back waistline side. Thus, a third inseam elastic region is formed.

  The disposable absorbent article according to a fourth aspect of the present invention is the disposable absorbent article according to any one of the first to third aspects, wherein the second crotch-around elastic body and the third crotch-around elastic body are provided at a crotch part of the absorbent body. It is arrange | positioned in the substantially concave shape along the both-sides edge of the located part.

  The disposable absorbent article according to claim 5 is the disposable absorbent article according to any one of claims 1 to 4, wherein the second inseam elastic body and the third inseam elastic body are on both sides in the width direction of the absorbent body. Along the edge, the absorber is disposed so as to be continuously overlapped from a portion located at the back waist portion of the absorber to a portion located at the abdominal waist portion.

  The disposable absorbent article according to claim 6 is the disposable absorbent article according to any one of claims 1 to 5, wherein the second inseam elastic body has a tensile strength greater than that of the first inseam elastic body. It is what you have.

  The disposable absorbent article according to claim 7 is the disposable absorbent article according to any one of claims 3 to 6, wherein the third inseam elastic body has a tensile strength greater than that of the first inseam elastic body. It is what you have.

  The disposable absorbent article according to an eighth aspect of the present invention is the disposable absorbent article according to any one of the first to seventh aspects, wherein the topsheet is a liquid-permeable sheet located at the center in the width direction and the liquid-permeable sheet. A hydrophobic sheet positioned on both sides in the width direction of the sheet, the hydrophobic sheet comprising: a fixed portion fixed to the absorbent article main body; a first inseam elastic body inside the fixed portion; A base end portion located between the second inseam elastic body, an extension portion extending from the base end portion in the width direction and standing on the absorbent article main body, and the extension portion And a free edge portion formed by disposing an elastic member on the side opposite to the base end portion.

  A disposable absorbent article according to a ninth aspect of the present invention is the disposable absorbent article according to any one of the first to eighth aspects, wherein the absorbent body has a groove part cut out along the longitudinal direction. The second inseam elastic body is located on the inner side in the width direction and is formed to have a length shorter than the length in the longitudinal direction of the second inseam elastic body.

  According to the disposable absorbent article of the first aspect, the first inseam elastic region is brought into close contact with the inseam portion by the first inseam elastic body and the second inseam elastic region is in contact with the second inseam elastic body when worn. Since both sides of the absorbent body in the width direction are in close contact with the skin, it is possible to improve the adhesion at the crotch part of the absorbent article body, to prevent leakage from both sides of the crotch part and to improve the feeling of wearing .

  According to the disposable absorbent article of the second aspect, both side edges of the absorbent body in the width direction are more likely to be in close contact with the skin, so that leakage from both side parts of the crotch part can be more reliably prevented.

  According to the disposable absorbent article according to claim 3, due to the expansion and contraction of the third inseam elastic body in the third inseam elastic region, the third inseam elastic region expands and contracts in the longitudinal direction and the width direction and is in close contact with the buttock. Therefore, it is possible to prevent leakage from both sides of the crotch part more reliably.

  According to the disposable absorbent article according to claim 4, since both side portions in the width direction of the absorbent body are in close contact with each other at the groin portion and the heel portion in addition to the crotch portion, the leakage from both sides of the crotch portion is further prevented. It can be surely prevented.

  According to the disposable absorbent article according to claim 5, since both sides of the absorbent body in the width direction continuously and securely adhere to each of the back waist part, the crotch part and the abdomen waist part, Leakage from both sides of the crotch part can be prevented more reliably.

  According to the disposable absorbent article of claim 6, the first inseam elastic region in which the first inseam elastic body is disposed does not overtighten the inseam portion, and the second inseam elastic body adheres to the skin. Therefore, it is possible to prevent leakage from the crotch part and improve the wearing feeling.

  According to the disposable absorbent article of claim 7, the first inseam elastic region where the first inseam elastic body is disposed does not overtighten the inseam part, and the third inseam elastic body is in close contact with the skin. Therefore, it is possible to prevent leakage from the crotch part and improve the wearing feeling.

  According to the disposable absorbent article according to claim 8, the hydrophobic sheet is less susceptible to expansion and contraction by the first crotch elastic region, the second crotch elastic region, and the third crotch elastic region. Since the extended portion of the hydrophobic sheet can be reliably erected by the elastic member disposed at the free end of the sheet, leakage from both side edges of the crotch part can be more reliably prevented.

  According to the disposable absorbent article of the ninth aspect, the second inseam elastic region where the second inseam elastic body is disposed is easily contracted, and the absorption by the space of the groove provided in the absorber. Since the body can move in the width direction, it can be applied to wearers of various body types having different crotch widths.

  Next, the structure of 1st Embodiment of the disposable absorbent article of this invention is demonstrated with reference to FIG.

  1 to 3, reference numeral 1 denotes a disposable diaper as a disposable absorbent article. The disposable diaper 1 is for children, adults or incontinence, and includes a diaper body 2 as an absorbent article body. . The diaper main body 2 includes a surface sheet 3 disposed on the surface side that is the inner surface side when mounted, a back sheet 4 disposed on the back surface side that is the outer surface side when mounted, and the surface sheet 3 and the back sheet 4. It has the absorber 5 which has the liquid absorption property arrange | positioned between. Here, the absorbent body 5 is formed of a material that can absorb excreted physiological fluid such as urine, for example, pulp as a main material, and partially contains a substance such as a polymer absorbent body.

  Further, the diaper main body 2 joins the peripheral edges of the top sheet 3 and the back sheet 4 to seal the absorbent body 5, and the back waist portion along the longitudinal direction A which is the vertical direction of the diaper main body 2. 6, a crotch part 7 as a leg part and a ventral waist part 8 are sequentially and integrally formed.

  Further, on both side edges in the width direction B which is the lateral direction of the crotch part 7 of the diaper main body 2, a substantially concave arc shape is directed inward so that an intermediate portion in the longitudinal direction A of the diaper main body 2 becomes narrow. A concave arc-shaped edge 11 is formed by cutting out the groove. Further, the absorbent body 5 of the diaper main body 2 is also formed in a concave arc shape that is notched in a substantially concave arc shape inward so that the middle portions of both side edges in the width direction B of the absorbent body 5 are narrow. An edge 12 is formed. Therefore, the diaper main body 2 has a substantially elongated and substantially hourglass shape in the unfolded state, is formed in a substantially symmetrical shape with the central portion in the longitudinal direction A as the center, and has a left and right with the central portion in the width direction B as the center. It is formed in a symmetrical shape.

  Further, on both sides in the width direction B of the crotch part 7 of the diaper main body 2, both sides of a substantially concave shape extending outward from both side edges in the width direction B of the absorbent body 5 located on the crotch part 7. A crotch flap portion 13 as a flap portion is formed along the longitudinal direction. These crotch flaps 13 are provided from the inside in the longitudinal direction A of the back waist part 6 of the diaper main body 2 to the inside in the longitudinal direction of the abdominal waist part 8 via both sides of the crotch part 7. It has been. That is, these inseam flap portions 13 are bonded to portions of the top sheet 3 and the back sheet 4 that extend outward from both sides in the width direction B of the absorbent body 5 in the crotch part 7 of the diaper body 2. It is formed by.

  Next, the top sheet 3 of the diaper main body 2 has a liquid permeable sheet 15 located in an intermediate portion in the width direction B of the top sheet 3 and a surface side of both sides of the liquid permeable sheet 15 in the width direction B. It is formed by the hydrophobic sheet 16 positioned. Further, the back sheet 4 of the diaper main body 2 has a liquid-impervious sheet 17 as a liquid-impermeable sheet positioned on the inner surface side facing the absorber 5 and an absorption on the outer surface side of the liquid-impervious sheet 17. It is formed by a nonwoven fabric sheet 18 as an outer sheet located on the opposite side of the side facing the body 5.

  Here, the liquid-impervious sheet 17 of the back sheet 4 is formed of a polyethylene (PE) film sheet or the like that has hydrophobicity or water repellency, that is, liquid impermeability and does not allow liquid such as urine to permeate reliably. ing. However, the liquid-impervious sheet 17 preferably has air permeability. Further, the liquid-impervious sheet 17 is fixed by bonding the outer peripheral edge of the liquid-impervious sheet 17 to the outer peripheral edges of the liquid-permeable sheet 15 and the hydrophobic sheet 16 of the top sheet 3. Further, the nonwoven fabric sheet 18 of the back sheet 4 has hydrophobicity or water repellency and has air permeability. Here, the nonwoven fabric sheet 18 is formed to have the same size as the liquid-impervious sheet 17 or larger than the liquid-impervious sheet 17.

  On the other hand, the liquid-permeable sheet 15 of the top sheet 3 is made of, for example, a cotton cloth, a non-woven fabric, a porous film, or a synthetic fiber breathable material, and has liquid permeability that allows liquid such as urine to pass through. Yes. Further, the hydrophobic sheet 16 of the surface sheet 3 is composed of a non-woven fabric or a synthetic resin sheet such as polyethylene resin having hydrophobicity or water repellency, that is, liquid impermeability and air permeability, and the liquid permeable sheet 15 Are arranged and attached to the outer edge in the width direction B along the longitudinal direction. The hydrophobic sheet 16 is bonded and fixed on the crotch flap 13 in the crotch part 7 of the diaper body 2. In other words, the hydrophobic sheet 16 is bonded and fixed on the liquid-impermeable sheet 17 of the back sheet 4 at the crotch part 7 of the diaper body 2.

  Further, as shown in FIGS. 2 and 3, the hydrophobic sheet 16 is positioned on both side edges in the width direction B of the hydrophobic sheet 16 and adhered to the liquid-impermeable sheet 17 of the back sheet 4. A fixed portion 21 fixed, a base end portion 22 located on the inner side in the width direction B of the fixed portion 21 and bonded to the liquid-permeable sheet 15 of the topsheet 3, and a base end portion 22 in a folded state An extension part 23 that is a three-dimensional gather that can stand up with respect to the liquid-permeable sheet 15 when attached to the inner side in the width direction B, and a tip that is opposite to the base end part 22 of the extension part 23 And a free edge portion 24 which is a free end as a non-joining portion provided in the portion.

  Here, the fixing part 21 of the hydrophobic sheet 16 is fixed over the longitudinal direction A along both side edges in the width direction B of the crotch flap part 13 in the crotch part 7 of the diaper body 2. Further, the base end portion 22 of the hydrophobic sheet 16 has a longitudinal direction A along both side edges in the width direction B of the liquid-permeable sheet 15 located at the crotch flap portion 13 in the crotch portion 7 of the diaper body 2. It is fixed over. Further, the free edge portion 24 of the hydrophobic sheet 16 is formed by folding the tip portion of the extension portion 23 inward, and inside the portion of the tip portion of the extension portion 23 that is folded, For example, two elastic members 25 are disposed in parallel in a state of being separated in the width direction B along the longitudinal direction A. Therefore, the elastic member 25 disposed on the free edge 24 raises the extended portion 23 of the hydrophobic sheet 16 at the time of mounting, and extends along the longitudinal direction A at both side edges in the width direction B of the absorbent body 5. Projecting flaps.

  Further, a plurality of gaps are formed along the longitudinal direction A of the diaper main body 2 between the liquid-impervious sheet 17 of the back sheet 4 and the hydrophobic sheet 16 of the top sheet 3 located in the crotch flap portion 13 of the diaper main body 2. For example, two first inseam elastic bodies 31 are arranged linearly. Therefore, a first inseam elastic region 32 serving as a first leg gather is formed in an area of the inseam flap portion 13 where the first inseam elastic body 31 is disposed. The first inseam elastic body 31 is linearly disposed between both ends in the longitudinal direction A of the concave arc-shaped edge 11 of the diaper body 2 and is directed in the width direction B of the diaper body 2. Are spaced apart and arranged in parallel. Further, the first inseam elastic body 31 is disposed at the center in the longitudinal direction A of the diaper main body 2, and both ends of the first inseam elastic body 31 in the longitudinal direction A of the absorbent body 5. At both end portions of the concave arc-shaped edge 12, the concave arc-shaped edge 12 is provided so as to overlap with the absorber 5.

  Here, the crotch flap portion 13 in which the first crotch-around elastic body 31 is disposed includes the liquid-permeable sheet 15 of the top sheet 3, the hydrophobic sheet 16, the liquid-impervious sheet 17 of the back sheet 4, and the nonwoven fabric. Although two or more and four or less sheets are laminated by the sheet 18, the number and combination of these sheets may be changed as necessary.

  Further, a plurality of, for example, three, third pieces are provided along the longitudinal direction A of the diaper body 2 between the liquid-impervious sheet 17 and the nonwoven fabric sheet 18 of the back sheet 4 of the crotch part 7 of the diaper body 2. A bifurcating elastic body 33 is arranged in a straight line. And these 2nd crotch circumference elastic bodies 33 are located inside width direction B rather than the base end part 22 of the hydrophobic sheet 16 of the diaper main body 2, and are located in the crotch circumference part 7 of this diaper main body 2. It arrange | positions in the position which overlaps with the concave arc-shaped edge 12 which is the both sides of the width direction B of the absorber 5. FIG. Therefore, these second crotch circumference elastic bodies 33 are disposed in the width direction B inside the crotch circumference portion 7 of the diaper body 2 with respect to the first crotch circumference elastic body 31. Further, the second crotch circumference elastic body 33 is disposed at the central portion in the longitudinal direction A of the diaper main body 2, and is formed to have a length shorter than the length of the first crotch circumference elastic body 31.

  The second inseam elastic body 33 is linearly disposed between both ends in the longitudinal direction A of the concave arcuate edge 12 of the absorbent body 5 and is directed toward the width direction B of the diaper body 2. Are spaced apart and arranged in parallel. Therefore, the width of the absorbent body 5 in which the second inseam-around elastic body 33 is provided, which is an area inside the inseam-around part 7 of the diaper body 2 than the area in which the first inseam-around elastic body 31 is provided. In the region of the concave arc edge 12 that is both sides in the direction B, a second inseam-around elastic region 34 serving as a second leg gather is formed.

  Furthermore, a loop fastener 41 having an elongated rectangular shape in plan view is bonded and fixed to the back side of the abdomen waist portion 8 of the diaper body 2. The loop fastener 41 is attached to substantially the center of each of the longitudinal direction A and the width direction B of the ventral side waist portion 8 of the diaper body 2 in a state where the longitudinal direction is along the width direction B of the diaper body 2. ing.

  On the other hand, for example, two tape fasteners 42 as tape-like fasteners are arranged in parallel at intervals on the back side of both end portions in the width direction B of the back waist portion 6 of the diaper body 2 and attached. It has been. These tape fasteners 42 are formed in an elongated tape shape having a longitudinal direction along the width direction B of the diaper main body 2. Here, the number of the tape fasteners 42 is not limited to two at each of both ends in the width direction B of the back waist portion 6, and may be at least one.

  Furthermore, the surface side of these tape fasteners 42 is formed so as to be able to engage with and disengage from the loop fasteners. The disposable diaper 1 is detachably attached to the wearer by engaging the front side of the tape fastener 42 with the loop fastener 41 on the back side of the abdomen waist portion 8 of the diaper body 2. Therefore, although this disposable diaper 1 is a tape fastening type, as this disposable diaper 1, both sides of the back waist part 6 and both sides of the abdomen waist part 8 of the diaper main body 2 other than the tape fastening type are used. It may be a pant-shaped pant type joined.

  Next, the operation of the disposable absorbent article according to the first embodiment will be described.

  First, when the disposable diaper 1 is not attached to the wearer's body, the longitudinal direction A of the diaper main body 2 is folded back into two so that the surface sheet 3 of the diaper main body 2 is inside from the state shown in FIG. In this state, tape fasteners 42 attached to both sides in the width direction B of the back waist portion 6 are folded back inward in the width direction B of the back waist portion 6 of the diaper body 2. It is in the state which turned up the surface side of the inside.

  At this time, the tape fastener 42 does not protrude from both sides of the diaper body 2 in the width direction B, so that it does not get in the way, and the tape fastener 42 does not engage with the diaper body 2 in a delusion.

  In this state, the front end portions of the tape fasteners 42 are respectively pulled so that the front end portions of the tape fasteners 42 protrude outward from both side portions in the width direction B of the back waist portion 6 of the diaper body 2.

  And when this diaper main body 2 is mounted on the body, the front side of the top sheet 3 of the diaper main body 2 is brought into contact with the skin so that the crotch part 7 of the diaper main body 2 is positioned in the crotch and the back side. The waist part 6 is located on the back side, and the abdomen waist part 8 is located on the abdomen.

  Next, tape fasteners 42 attached to both sides in the width direction B of the back waist part 6 of the diaper body 2 are placed on the loop fasteners 41 attached to the belly waist part 8 of the diaper body 2. The diaper main body 2 is attached to the body so as to be detachably engaged with the body.

  At this time, due to the elastic force of the elastic member 25 of the free edge 24 of the hydrophobic sheet 16 attached to each crotch flap portion 13 of the diaper main body 2, these elastic members 25 contract in the longitudinal direction, and these hydrophobic members The extension part 23 of the sheet 16 stands inward from the crotch flap part 13 to form a flap and comes into contact with the crotch part of the wearer. Both sides of the liquid-permeable sheet 15 of the top sheet 3 in the width direction B Prevent leakage of urine from the body.

  Further, due to the elastic force of the first crotch-around elastic body 31 attached to each crotch flap portion 13 of the diaper main body 2, the first crotch-around elastic body 31 contracts in the longitudinal direction A, and the outside of the crotch flap portion 13. The first inseam elastic region 32 located at the edge serves as the first leg gather, and contacts the inseam of the wearer outside the position where the extended portion 23 of the hydrophobic sheet 16 contacts, Leakage of urine and the like from both sides in the width direction B of the hydrophobic sheet 16 is prevented.

  Further, the second crotch-around elastic body 33 is moved in the longitudinal direction A by the elastic force of the second crotch-around elastic body 33 attached to both sides in the width direction B of the crotch-around portion 7 of the absorbent body 5 of the diaper body 2. The second inseam elastic region 34 located on both side portions in the width direction B of the absorbent body 5 becomes the second leg gathers by contraction, and the position where the extended portion 23 of the hydrophobic sheet 16 contacts. It contacts the crotch part of the inner wearer and prevents leakage of urine and the like from both sides of the absorbent body 5 in the width direction B.

  Therefore, when the disposable diaper 1 is attached, the first inseam-around elastic region 32 is attached by the first inseam-around elastic body 31 disposed on the inseam flap portion 13 of the inseam-around portion 7 of the diaper body 2 of the disposable diaper 1. The second crotch circumference elastic region 34 is arranged in the width direction of the absorbent body 5 by the second crotch circumference elastic body 33 that is in close contact with the crotch area of the person and is disposed at a position that overlaps both sides of the absorbent body 5 of the diaper body 2. Adhere both sides of the skin to the skin inside the inseam of the wearer.

  Accordingly, the elastic force of the first crotch elastic body 31 and the second crotch elastic body 33 can improve the close contact of the crotch part 7 of the diaper body 2 with the wearer's crotch part. It is possible to prevent leakage of urine and the like from both sides of the crotch part 7 and improve the feeling of wearing the disposable diaper 1.

  Further, since the second inseam elastic body 33 is disposed on the concave arc-shaped edges 12 on both sides of the absorbent body 5 of the diaper body 2, the second inseam elastic body 33 and the skin when the disposable diaper 1 is worn. Between which the absorber 5 is interposed. Therefore, in the second inseam elastic region 34 in which the second inseam elastic body 33 is provided, the concave arcuate edge 12 of the absorber 5 can be softly adhered to the wearer's crotch, so that the absorber 5 is bent. It is possible to prevent the diaper main body 2 from becoming thick due to, for example, overlapping, so that the wearing feeling of the disposable diaper 1 can be improved.

  Further, the first crotch-around elastic region 32 of the crotch flap portion 13 of the diaper body 2 is formed by laminating the hydrophobic sheet 16 of the top sheet 3, the liquid-impermeable sheet 17 of the back sheet 4, and the nonwoven fabric sheet 18. A first crotch-around elastic body 31 is disposed between the hydrophobic sheet 16 of the top sheet 3 and the liquid-impermeable sheet 17 of the back sheet 4. As a result, the liquid-impervious sheet 17 is interposed up to the outer edge of the first crotch-around elastic region 32 of the crotch flap portion 13, and the sheets are laminated in three layers in the first crotch-around elastic region 32. It becomes a state. Accordingly, since liquid such as urine from the top sheet 3 side to the outside of the back sheet 4 in the first inseam elastic region 32 can be prevented from leaking out, leakage in the first inseam elastic region 32 is ensured. Can be prevented.

  And when the base end part 22 of the hydrophobic sheet 16 of the surface sheet 3 of the diaper main body 2 is positioned outside the first inseam elastic body 31, the base end part 22 and the width direction B of the absorbent body 5 The distance between the two side edges becomes too long, and liquid such as urine flowing to the base end portion 22 becomes difficult to be absorbed by the absorber 5. Moreover, when this base end part 22 is located inside the 2nd inseam round elastic body 33, the width dimension of the part which touches skin among the liquid-permeable sheets 15 of the surface sheet 3 will become small. Further, when the base end portion 22 is disposed so as to overlap the first crotch-around elastic region 32 or the second crotch-around elastic region 34, the base end portion 22 itself is the first crotch-around elastic body 31 or the second crotch elastic member 31. Since the crotch circumference elastic body 33 contracts due to the contraction, the extending portion 23 is difficult to stand up. Therefore, it is preferable that the base end portion 22 of the hydrophobic sheet 16 be positioned on the inner side of the first inseam elastic body 31 and on the outer side of the second inseam elastic body 33.

  Here, the first crotch circumference elastic body 31 and the second crotch circumference elastic body 33 may be a plurality other than two as long as at least one is provided. At this time, when the first crotch elastic body 31 and the second crotch elastic body 33 are combined, the first crotch elastic body 31 and the second crotch elastic body 33 are formed into a wide belt-like elasticity. It is good as a body. Further, when the first crotch circumference elastic body 31 and the second crotch circumference elastic body 33 are formed into a thin thread shape, a plurality of the first crotch circumference elastic body 31 and the second crotch circumference elastic body 33 are formed in the width direction. The first crotch-around elastic region 32 and the second crotch-around elastic region 34 can also be formed in parallel.

  Further, both side portions of the middle part in the longitudinal direction A of each of the diaper main body 2 and the absorbent body 5 are notched in a substantially concave arc shape to form concave arc-shaped edges 11, 12. As the shape, the central part in the longitudinal direction A of the concave arc edges 11 and 12 may be formed linearly or may be formed in a curved concave arc shape. In this case, from the viewpoint of surely preventing leakage from the concave arcuate edges 11 and 12, the concave arcuate edges 11 and 12 of the diaper main body 2 and the absorbent body 5 are formed substantially in parallel, and the first inseam elastic body 31 is formed. The second inseam elastic body 33 may be disposed substantially parallel to the concave arcuate edges 11 and 12 of the diaper main body 2 and the absorbent body 5, respectively.

  Further, the second inseam elastic body 33 is disposed in order to improve the adhesion of the wearer's crotch part. For this reason, the length of the second inseam elastic body 33 may be shorter than the length of the first inseam elastic body 31 that closely contacts the wearer's inseam area.

  Further, as in the second embodiment shown in FIG. 4, the first crotch-around elastic region 32 of the crotch flap portion 13 of the diaper main body 2 is divided into a hydrophobic sheet 16 of the top sheet 3 and a non-woven sheet 18 of the back sheet 4. And a structure in which the first crotch-around elastic body 31 is disposed between the hydrophobic sheet 16 and the nonwoven fabric sheet 18. In this case, since the sheet of the first crotch circumference elastic region 32 is composed of two layers of the hydrophobic sheet 16 and the nonwoven fabric sheet 18 in the crotch flap portion 13 of the diaper main body 2, the air permeability in the first crotch circumference elastic region 32 is obtained. Can be improved.

  Further, as in the third embodiment shown in FIGS. 5 and 6, the number of second inseam elastic bodies 33 is increased to, for example, five, and these second inseam elastic bodies 33 are formed as the absorbent body 5. It can also be set as the structure arranged in parallel from the both sides of the width direction B to the inner side of the width direction B of the crotch flap part 13. That is, these second inseam elastic bodies 33 extend in the width direction B so as to be located on the inner side in the width direction B of the crotch flap portion 13 from the positions overlapping the both sides in the width direction B of the absorbent body 5. It is arranged.

  Specifically, the second inseam elastic body 33 is disposed at a position where two of the second inseam elastic bodies 33 overlap with both side portions of the absorbent body 5, and the second inseam elastic body 33. 2 of these are disposed on the inner side of the crotch flap portion 13, and one of these second crotch-around elastic bodies 33 overlaps with both side edges of the absorbent body 5, that is, the absorbent body 5 and the crotch flap portion. It is arrange | positioned in the position between 13. Therefore, the second inseam elastic body 33 is arranged with the concave arc edge 12 of the absorber 5 as the center in the width direction B. Here, the second inseam elastic body 33 is located inside the first inseam elastic region 32 so as not to overlap the first inseam elastic region 32 in which the first inseam elastic body 31 is disposed. It is preferable that it is disposed.

  As a result, the second crotch circumference elastic region 34 in which the second crotch circumference elastic body 33 is disposed is formed so as to straddle both sides in the width direction B of the absorbent body 5 along the width direction B. Accordingly, when the disposable diaper 1 is worn, the concave arcuate edges 12 that are both sides in the width direction B of the absorbent body 5 of the disposable diaper 1 are more likely to be in close contact with the wearer's crotch. Therefore, leakage of urine from both sides of the crotch part 7 of the diaper body 2 can be prevented more reliably.

  Further, as in the fourth embodiment shown in FIG. 7, the second inseam elastic body 33 is substantially along the both ends in the longitudinal direction A of the concave arcuate edges 11 and 12 of the diaper main body 2 and the absorbent body 5. The third crotch-around elastic body 44 may be disposed from the end on the back waistline portion 6 side in the longitudinal direction A to the back waistline portion 6 of the diaper main body 2. In this case, the second inseam elastic body 33 is formed such that the length in the longitudinal direction A of the second inseam elastic body 33 is shorter than the length in the longitudinal direction A of the first inseam elastic body 31.

  The third inseam elastic body 44 is linearly formed from the end of each second inseam elastic body 33 on the back waist portion 6 side toward the end in the longitudinal direction A of the inseam flap portion 13. It is arranged. That is, the third inseam elastic body 44 is disposed along a direction inclined with respect to the longitudinal direction A of the second inseam elastic body 33, and at least a part of the third inseam elastic body 44. Is arranged so as to cross the first inseam elastic body 31. In other words, the third inseam elastic body 44 has a longitudinal direction A on the back waistline 6 side and an end in the longitudinal direction A on the back waistline part 6 side of the second inseam elastic body 33. It extends in a straight line toward the outer side in the width direction B.

  As a result, the region where the third inseam-around elastic body 44 is disposed becomes the third inseam-around elastic region 45, and the third inseam-around elastic region 45 is the back waist of the concave arc-shaped edge 12 of the absorbent body 5. It is formed from the end portion on the rotating portion 6 side to the end portion on the back waist portion 6 side of the concave arc-shaped edge 11 of the diaper body 2. Accordingly, when the disposable diaper 1 is mounted, the third inseam elastic region 45 is expanded in the longitudinal direction A and the width direction B by the expansion and contraction of each third inseam elastic body 44 disposed in the third inseam elastic region 45. Since the third inseam elastic region 45 can be in close contact with the wearer's buttocks, it is possible to more reliably prevent urine leakage from both sides of the wearer's inseam. .

  The third inseam elastic region 45 may be formed not only on the back waistline 6 side but also on the abdomen waistline 8 side. In this case, the third crotch circumference elastic body 44 of the third crotch circumference elastic region 45 extends from the end of the second crotch circumference elastic body 33 on the abdomen waistline part 8 side to the abdomen waistline part 8 side. It is arranged so as to extend linearly toward the outside in the longitudinal direction A and the width direction B, and is arranged so that at least a part of the third inseam elastic body 44 intersects the first inseam elastic body 31. Make it. As a result, when the disposable diaper 1 is worn, the third inseam elastic region 45 expands and contracts in each of the longitudinal direction A and the width direction B of the diaper body 2, and the end of the concave arc-shaped edge 11 of the diaper body 2 is attached to the wearer. Since it can adhere to a heel part and a groin part, leakage of urine etc. from crotch part 7 of this diaper main part 2 can be prevented more certainly.

  Further, the second crotch circumference elastic body 33 and the third crotch circumference elastic body 44 may be formed continuously by one member or may be formed by joining end portions of different members.

  Further, as in the fifth embodiment shown in FIG. 8, the third inseam elastic body 44 is arranged to be curved along the concave arcuate edges 11 and 12 of the diaper main body 2 and the absorbent body 5. You can also In this case, the third inseam elastic body 44 is continuously arranged at both ends in the longitudinal direction A of the second inseam elastic body 33, and the back waist part 6 side of the diaper body 2 is disposed. A third inseam elastic region 45 is formed on each of the abdomen waist portion 8 side. Further, the third inseam elastic body 44 is formed to extend outward from both end portions of the concave arc-shaped edge 12 of the absorber 5 and to the inseam flap portion 13.

  That is, each of the third crotch circumference elastic body 44 and the second crotch circumference elastic body 33 extends along the concave arcuate edge 12 located in the crotch circumference portion 7 of the absorbent body 5 in the width direction of the absorbent body 5. It is continuously arranged in a substantially concave arc shape so as to overlap both side edges of B. Further, the third crotch circumference elastic body 44 and the second crotch circumference elastic body 33 are juxtaposed in parallel with being spaced apart at equal intervals in the width direction B of the diaper body 2. At this time, the wearer has various body shapes, and in particular, there is a large difference in the shape of the groin portion or the heel portion. Also, the tensile strength per unit area of the third inseam elastic body 44, that is, the elastic force is large.

  As a result, the third crotch waist elastic body 44 is continuously arranged at the respective ends of the back crotch part 6 side and the abdomen waist part 8 side in the longitudinal direction A of the second crotch circumference elastic body 33, These third inseam elastic bodies 44 are arranged so as to be curved along the concave arcuate edges 12 of the diaper main body 2 and the absorbent body 5. As a result, when the disposable diaper 1 is mounted, both side portions in the width direction B of the absorbent body 5 are added to the wearer's crotch region by the elastic force of the second crotch region elastic body 33 and the third crotch region elastic body 44. It also adheres securely to the head and heel. Therefore, leakage of urine and the like from the wearer's crotch part, the groin part, and both sides of the buttock can be more reliably prevented.

  Further, the tensile strength per unit area of the third inseam elastic body 44 is made larger than that of the second inseam elastic body 33, so that the concave arc-shaped edge of the absorber 5 is generated by the elastic force of the third inseam elastic body 44. Since both end portions of 12 are in close contact with the wearer's groin and groin, leakage of urine and the like from both sides of the absorbent body 5 at the groin and groin of the wearer can be more reliably prevented.

  Here, each of the second crotch elastic body 33 and the third crotch elastic body 44 is disposed at equal intervals in the width direction B. The third inseam elastic body 44 is arranged at a different interval, or the third inseam elastic body 44 is arranged so that the interval gradually increases toward the outside in the longitudinal direction A and the width direction B. You may do it.

  Further, as in the sixth embodiment shown in FIG. 9, the second crotch elastic body 33 and the third crotch elastic body disposed along the concave arcuate edges 11 and 12 of the diaper body 2 and the absorbent body 5. 44 can also be disposed extending from a position overlapping both side portions of the absorbent body 5 to the inner side of the crotch flap portion 13. In this case, both the side portions of the absorbent body 5 and the inner side portion of the crotch flap portion 13 of the diaper main body 2 can be closely attached to the crotch portion, the groin portion, and the heel portion of the wearer. In addition, leakage of urine and the like from the groin and groin can be prevented more reliably.

  Further, as in the seventh embodiment shown in FIG. 10, from both ends of the concave arc-shaped edge 12 of the absorbent body 5 along the both side edges of the absorbent body 5, the back waist portion 6 side and the ventral waist The third crotch-around elastic body 44 can be disposed over both ends on the side of the turning portion 8. In this case, these third inseam elastic bodies 44 are the widths of the portions disposed so as to overlap the back waist portion 6 and the abdomen waist portion 8 located at both ends in the longitudinal direction A of the absorbent body 5. It is arranged in a straight line along both side edges in the direction B.

  Therefore, the second crotch-around elastic body 33 or the third crotch-around elastic body 44 is continuously disposed over the entire longitudinal direction A at a position overlapping both sides of the absorbent body 5 in the width direction B. Accordingly, the second crotch waist elastic body 33 and the third crotch waist elastic body 44 are formed along the both side edges in the width direction B of the absorbent body 5, the back waistline portion 6, the crotch circumference portion 7, and the abdomen. It arrange | positions so that it may overlap with the both-sides edge part of the absorber 5 of each side waist part 8 continuously. Therefore, when the disposable diaper 1 is worn, both side edges in the width direction B of the absorbent body 5 are continuously and reliably provided to the wearer in each of the back waist part 6, the crotch part 7 and the abdomen waist part 8. Since it can adhere, leakage of urine etc. from both sides in the width direction B of the absorbent body 5 can be reliably prevented.

  Further, as in the eighth embodiment shown in FIG. 11, the second inseam elastic body 33 continuously disposed in the entire longitudinal direction A at a position overlapping with both sides in the width direction B of the absorbent body 5. The third inseam elastic body 44 extends from a position overlapping both sides of the absorbent body 5 to the hydrophobic sheet 16 of the back waist part 6, the crotch part 7 and the abdomen waist part 8 of the diaper body 2. It is also possible to extend them across and to be spaced apart in parallel.

  At this time, the second crotch circumference elastic body 33 or the second crotch circumference elastic body 33 and the third crotch circumference elastic body 44 are arranged to have a tensile strength larger than the tensile tension of the first crotch circumference elastic body 31. Has been. The tensile strength of the first inseam elastic body 31, the second inseam elastic body 33, and the third inseam elastic body 44 can be changed by changing the material or by using the same material. Or by changing the stretch rate when attaching the same material and the same standard, that is, the stretch ratio.

  As a result, the second inseam elastic body 33 or the second inseam elastic body 33 and the third inseam elastic body 44 have a tensile tension greater than that of the first inseam elastic body 31, thereby being disposable. When the diaper 1 is worn, the first crotch circumference elastic region 32 does not overtighten the wearer's crotch portion, and the second crotch circumference elastic region 34 or the third crotch circumference elastic region 45 is the skin of the wearer's groin and buttocks. Therefore, it is possible to prevent leakage of urine from the crotch part, the groin part, and the buttocks, and improve the wearing feeling of the disposable diaper 1.

  In addition, from the viewpoint of closely attaching both side edges of the absorbent body 5 in the width direction B to the wearer, the second inseam around elastic region 34 or the second inseam around elastic region 34 and the third inseam around elastic region 45 are It is preferable that the width dimension in the width direction B, that is, the area in the width direction B is larger than that of the inseam elastic region 32. Specifically, the second inseam elastic body 33, or the second inseam elastic body 33 and the third inseam elastic body 44 are set to be wider than the first inseam elastic body 31. Alternatively, the number of the second crotch elastic bodies 33 or the number of the second crotch elastic bodies 33 and the third crotch elastic bodies 44 is increased.

  Here, by disposing at least a part of the third inseam elastic body 44 so as to intersect with the base end portion 22 of the hydrophobic sheet 16 of the top sheet 3 of the diaper main body 2, the third inseam elastic body 44 is provided. The extended portion 23 of the hydrophobic sheet 16 can be erected at the time of mounting without being substantially affected by the above. Further, in order to make the extending portion 23 of the hydrophobic sheet 16 easy to stand at the time of mounting, the contraction rate in the longitudinal direction A of the free edge 24 of the hydrophobic sheet 16 is set to a first inseam elastic region 32, It is preferable that the contraction rate in the longitudinal direction A of each of the second inseam elastic region 34 and the third inseam elastic region 45 is larger.

  Further, as in the ninth embodiment shown in FIG. 12, a groove 47 having a concave cross section cut out along the longitudinal direction A may be formed on both sides in the width direction B of the absorbent body 5. it can. The groove portion 47 is located on the inner side in the width direction B than the second inseam elastic body 33 and is formed to have a length shorter than the length in the longitudinal direction A of the second inseam elastic body 33. Further, the groove portion 47 is provided on the inner side in the width direction B than the second inseam around elastic region 34 in which the second inseam around elastic body 33 of the absorber 5 is disposed. Both side portions in the direction B are cut out in the longitudinal direction A. Further, a liquid-permeable sheet 15 of the top sheet 3 is laminated on the groove portion 47, and the liquid-permeable sheet 15 is bonded to the liquid-impervious sheet 17 of the back sheet 4 in the groove portion 47. Is fixed.

  As a result, the groove portion 47 is formed along the longitudinal direction A on both sides of the absorbent body 5 in the width direction B, so that the second inseam around the second inseam elastic body 33 of the absorbent body 5 is disposed. The elastic region 34 is easily contracted, and the absorber 5 can be moved in the width direction B by the space of the groove 47 provided in the absorber 5. Therefore, the disposable diaper 1 that can be applied to wearers of various body types having different crotch widths can be obtained.

  Here, any number of the groove portions 47 may be provided in the absorbent body 5, but from the viewpoint of easily contracting the second inseam elastic region 34 of the absorbent body 5, the groove portion 47 is formed in the width direction B of the absorbent body 5. It is preferable to provide a total of two grooves 47, one on each side. Furthermore, if the width dimension of these groove portions 47 is increased, the absorbency and strength of the absorbent body 5 are reduced. Therefore, the width of these groove portions 47 is almost linear as compared with the width of the absorbent body 5. It is preferable that the top sheet 3 and the back sheet 4 are joined to each other at the bottom of the grooves 47.

It is a top view of the disposable absorbent article which shows the 1st Embodiment of this invention. It is transverse cross-sectional explanatory drawing at the time of non-mounting | wearing of the II line part of FIG. It is a cross-sectional explanatory drawing at the time of mounting | wearing of the II line part of FIG. It is a cross-sectional explanatory drawing at the time of a part of disposable absorbent article which shows the 2nd Embodiment of this invention. It is a top view of the disposable absorbent article which shows the 3rd Embodiment of this invention. FIG. 6 is a cross-sectional explanatory diagram when the II-II line portion of FIG. 5 is not attached. It is a top view of the disposable absorbent article which shows the 4th Embodiment of this invention. It is a top view of the disposable absorbent article which shows the 5th Embodiment of this invention. It is a top view of the disposable absorbent article which shows the 6th Embodiment of this invention. It is a top view of the disposable absorbent article which shows the 7th Embodiment of this invention. It is a top view of the disposable absorbent article which shows the 8th Embodiment of this invention. It is transverse cross-sectional explanatory drawing at the time of a part of disposable absorbent article which shows the 9th Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Disposable diaper as a disposable absorbent article 2 Diaper body as an absorbent article body 3 Top sheet 4 Back sheet 5 Absorber 6 Back waist part 7 Crotch part 8 Abdomen waist part
13 Inseam flap
15 Liquid-permeable sheet
16 Hydrophobic sheet
17 Impervious sheet
18 Nonwoven sheet as outer sheet
21 Fixed part
22 Base end
23 Extension
24 Free edge
25 Elastic member
31 First inseam elastic body
32 First inseam elastic region
33 Second inseam elastic body
34 Second inseam elastic region
44 3rd inseam elastic body
45 3rd inseam elastic region
47 Groove

Claims (9)

It has a top sheet positioned on the inner surface side, a back sheet positioned on the outer surface side, and an absorbent body disposed between the top sheet and the back sheet. The absorbent article main body in which the lower part and the abdomen waist part are sequentially formed integrally,
The back sheet has a liquid-impervious sheet positioned on the side facing the absorber and an outer sheet positioned on the opposite side of the side facing the absorber.
The crotch part is formed in a substantially concave shape with both sides in the width direction of the crotch part facing inward,
The absorbent body is formed in a substantially concave shape on both sides of a portion located in the crotch part of the absorbent body, and is directed inward.
On both sides in the width direction of the crotch part of the absorbent article main body, a substantially concave crotch flap part extending outward from both side edges in the width direction of the absorbent body is formed along the longitudinal direction,
Between the top sheet and the back sheet of the crotch flap portion, a first crotch elastic body is disposed along the longitudinal direction to form a first crotch elastic region,
At a position overlapping the absorbent body on the inner side in the width direction of the first crotch circumference elastic region, a second crotch circumference elastic body is provided along the longitudinal direction between the liquid-impervious sheet and the outer sheet of the back sheet. A disposable absorbent article, characterized in that it is disposed to form a second inseam elastic region. 2. The disposable absorbent article according to claim 1, wherein the crotch part is provided with a plurality of second crotch part elastic bodies from a position overlapping the absorbent body to the crotch flap part. The length in the longitudinal direction of the second inseam elastic body is shorter than the length in the longitudinal direction of the first inseam elastic body,
A third inseam elastic body is disposed from an end of the second inseam elastic body on the back waist portion side toward the outside in the longitudinal direction and the width direction on the back waist portion side, and the third incline elastic body is arranged. The disposable absorbent article according to claim 1, wherein a lower elastic region is formed. The second inseam elastic body and the third inseam elastic body are arranged in a substantially concave shape along both side edges of a portion located in the crotch part of the absorbent body. A disposable absorbent article as described above. The second crotch waist elastic body and the third crotch waist elastic body are portions located on the ventral waist circumference portion from the portion located on the back waist circumference portion of the absorbent body along both side edges in the width direction of the absorber. The disposable absorbent article according to any one of claims 1 to 4, wherein the disposable absorbent article is disposed so as to overlap continuously. The disposable absorbent article according to any one of claims 1 to 5, wherein the second inseam elastic body has a tensile strength greater than that of the first inseam elastic body. The disposable absorbent article according to any one of claims 3 to 6, wherein the third inseam elastic body has a tensile strength greater than that of the first inseam elastic body. The top sheet has a liquid-permeable sheet located at the center in the width direction, and hydrophobic sheets located on both sides in the width direction of the liquid-permeable sheet,
The hydrophobic sheet includes a fixed portion fixed to the absorbent article main body, a base end located between the first crotch elastic body and the second crotch elastic body inside the fixed portion, An extension part extending in the width direction from the base end part and standing up with respect to the absorbent article main body, and an elastic member is disposed on the opposite side of the extension part from the base end part A disposable absorbent article according to any one of claims 1 to 7, further comprising a free edge formed. The absorber has a groove part cut out along the longitudinal direction,
The groove is located on the inner side in the width direction from the second inseam elastic body and is formed to have a length shorter than the length in the longitudinal direction of the second inseam elastic body. A disposable absorbent article as described above.

Images