JP6091147B2 - Open disposable diaper - Google Patents

Description

  The present invention relates to an open-type disposable diaper, and more particularly to an open-type disposable diaper having a buttock cover portion.

  Conventionally, an open-type disposable diaper having an absorption chassis and an elastic waist belt that fits around a wearer's waist is known. For example, Patent Document 1 includes an elastic waist belt extending in the lateral direction and an absorption chassis extending in the front-rear direction and having a liquid absorbing structure disposed therein, and the rear end portion of the absorption chassis is substantially in the center in the horizontal direction of the elastic waist belt. An open-type disposable diaper connected to the part is disclosed.

Japanese Patent No. 4975811

  Since the open-type disposable diaper disclosed in Patent Document 1 can adjust the absorbent garment to fit the body with an elastic waist belt, it is easier to replace the garment when the wearer is standing It can be carried out.

  However, in the diaper disclosed in Patent Document 1, since the absorption chassis is joined to the elastic waist belt so as to be T-shaped, the shape is similar to that of a sumo wrestler and the appearance is not good, but the buttock is worn while wearing. There is a problem that it is difficult to fit.

  Therefore, an object of the present invention is to provide an open-type disposable diaper that is an improvement of the conventional technique and that can fit the wearer's buttocks and have an underwear-like appearance.

The present invention has a front and rear direction and a lateral direction orthogonal to each other, and a front waist region, a rear waist region, and a crotch region located between the front and rear waist regions, and an elastic waist belt extending in the lateral direction, and extending in the front and rear direction. The present invention relates to an open-type disposable diaper including an absorbent chassis in which a liquid absorbing structure is disposed, and a rear end portion of the absorbent chassis connected to a lateral central portion of an elastic waist belt.

An open-type disposable diaper according to the present invention includes a front end edge extending in a lateral direction of an elastic waist belt, a contour edge extending obliquely from the front end edge to both side edges of an absorption chassis located in a crotch region, A plurality of ridges extending in a direction parallel to the contour edge, the pair of ridge cover parts being provided with a pair of flange cover parts defined by both side edges extending in the front-rear direction of the chassis. by elastic material is stretchable to a fixed, have a resilient as a whole, the leg elastic body are telescopically joined along a concave-shaped portion of the side edges located in the crotch region, buttocks The number of elastic materials is larger than the number of leg elastic bodies, and the heel elastic material extends obliquely in a straight line along the straight contour edge, whereas the leg elastic body has a concavely curved portion. Along Slowly it is curved.

  An open-type disposable diaper according to the present invention includes a pair of stretchable buttocks cover portions interposed between a front end edge extending in the lateral direction of the elastic waist belt and both side edges extending in the front-rear direction of the absorbent chassis. Therefore, it is possible to provide an open-type disposable diaper that fits while widely covering the wearer's buttocks and can have an appearance like underwear.

The perspective view of the open-type disposable diaper in 1st Embodiment of this invention. The expansion | deployment top view which expand | deployed the open-type disposable diaper and was seen from the skin opposing surface. The exploded perspective view of a diaper. The figure which looked at the elastic waist belt from the back in the deployment state of a diaper. The expansion | deployment top view which showed only the elastic waist belt of the diaper in 2nd Embodiment with the continuous line. The expansion | deployment top view which showed only the elastic waist belt of the diaper in 3rd Embodiment with the continuous line. The expansion | deployment top view which showed only the elastic waist belt of the diaper in 4th Embodiment with the continuous line.

<First Embodiment>
1 to 3, an open-type disposable diaper 10 according to the present embodiment has a front-rear direction Y and a lateral direction X orthogonal thereto. The diaper 10 has a skin facing surface and a non-skin facing surface, a front waist region 11, a rear waist region 12, and a crotch region 13 positioned between the front and rear waist regions 11, 12. In the absorption chassis 15 having the liquid absorption structure 14 attached to the opposite surface and extending in the front-rear direction, and in the rear waist region 12, the rear end portion 52 of the absorption chassis 15 is connected to the substantially central portion in the horizontal direction. Elastic waist belt 16 extending to X. When the diaper 10 is worn, both side edges of the elastic waist belt 16 are connected to each other via the first fastening means 17, and the front end portion 51 of the absorbent chassis 15 that defines the front waist region 11 is the second fastening means 18. The waist opening 19 and the pair of leg openings are demarcated by being connected to the outer surface of the elastic waist belt 16 via the heel, and the buttock cover portion 80 covers the wearer's buttock widely.

  Referring to FIGS. 2 and 3, the absorption chassis 15 has front and rear end edges 15a and 15b extending straight in the lateral direction X, and extends in the front and rear direction Y between the front and rear end edges 15a and 15b. It has a vertically long rectangular shape defined by concave side edges 15c and 15d. The absorption chassis 15 further includes a cover sheet 50 that forms its outer shape, a front end portion 51 that forms the front waist region 11, a rear end portion 52 that is positioned in the rear waist region 12, and the front and rear end portions 51 and 52. And an intermediate portion 53 that forms the crotch region 13. The cover sheet 50 is formed from a hardly liquid-permeable fiber nonwoven fabric sheet, a plastic film, or a laminate sheet thereof. The cover sheet 50 has a main body portion 56 on which the liquid absorbing structure 14 is disposed, and both side portions 57 located on both sides in the lateral direction X. The both side portions 57 are bent inwardly, 56 is fixed. Specifically, the both side portions 57 are bent between the front and rear fixed end portions 60 and 61 fixed to the main body portion 56 via the joining region 58 to which the hot melt adhesive is applied, and the front and rear fixed end portions 60 and 61. And a fixed side portion 63 extending in the front-rear direction Y along the side portions (both side edges 15c and 15d of the absorption chassis 15). In both side portions 57, a plurality of string-like or strand-like leg elastic bodies 62 are disposed so as to be extendable and contracted along both concave side edges (leg opening edges) 15c and 15d.

  Further, both side portions 57 have sleeve-like distal edges formed by folding inner edges thereof, and a plurality of string-like shapes extending straight in the front-rear direction Y are included in the distal edges. Alternatively, the strand-like cuff elastic body 64 is fixed so as to be stretchable. When the diaper 10 is worn, the distal edge is separated from the skin-facing surface of the main body 56 by the contracting action of the cuff elastic body 64, and a pair of barrier cuffs for preventing side leakage of excrement are formed. The leg elastic body 62 and the cuff elastic body 64 can be formed from, for example, an elastic material having a thickness of 470 to 940 dtex and an expansion ratio of about 1.5 to 2.8 times.

  By arranging the leg elastic body 62, the leg opening edge fits to the wearer's thigh and the barrier cuff fits to the groin by the cuff elastic body 64, thereby ensuring the side leakage of excrement. Can be prevented. Further, when the diaper 10 is lifted / lowered in the form of a pant, there is no possibility that the leg opening edge is bent or bent. Moreover, when the diaper 10 is pulled up by the middle part of the absorption chassis 15 having a concave shape, there is no possibility that the central part will be caught inside the wearer's thigh and part of it will be torn.

  The liquid absorbing structure 14 is fixed to the skin-facing surface of the main portion 56 of the cover sheet 50 through a hot melt adhesive, and includes at least a liquid absorbing layer 65 and a liquid absorbing layer formed from the liquid permeable sheet. A body side liner 66 covering the skin facing surface side. The absorbent layer 65 is an absorbent formed from a mixture that is water-insoluble and has a water absorption capacity of 10 times or more of its own mass, so-called super absorbent polymer particles (SAP), wood fluff pulp, and optionally a slight amount of thermoplastic fibers. It is formed by encapsulating a conductive core with a liquid-permeable sheet such as a hydrophilic SMS nonwoven fabric. On the lower surface of the liquid-absorbing structure 14, a leak-proof sheet 67 formed from a liquid-impervious sheet larger than the outer dimension thereof is disposed.

  The absorption chassis 15 has a connection panel 68 that extends in the lateral direction X along the front end edge in the front waist region 11 and is arranged to connect the front end portions of the barrier cuff. The connection panel 68 includes an inner surface sheet 70 positioned on the skin facing surface side, an outer surface sheet 71 positioned on the non-skin facing surface side, and an elastic body 72 attached in an extendable manner therebetween. The connection panel 68 includes a front central elastic region 73 in which the elastic body 72 is disposed, inelastic both side portions located on both sides of the front central elastic region 73 in the lateral direction X, and skin facing surface sides of both side portions. And a pair of second fastener portions 74 arranged.

  Referring to FIG. 2, the elastic waist belt 16 includes a horizontally long rectangular elastic panel 20, a locking flap 22 attached to one side of the elastic panel 20, and a locked flap 24 attached to the other side. And have. The elastic panel 20 has front and rear end edges 16a and 16b extending in parallel with the horizontal direction X. The front end edge 16a has a convex shape with the central portion in the horizontal direction X facing forward, and the rear end edge 16b is It extends straight in the lateral direction X. A locking flap 22 having a shape protruding outward in the lateral direction X is attached to one of both side edges of the elastic panel 20, and a rectangular locked flap 24 is attached to the other side edge. The elastic waist belt 16 is divided into a central portion 25 connected to the absorption chassis 15 and a belt portion 26 extending outward in the lateral direction X from both side edges 15c and 15d of the rear end portion 52 of the absorption chassis 15 for convenience of explanation. Is done. A fastener portion 27 is positioned on the skin facing surface of the locking flap 22, and a first receiving portion 28 is disposed on the non-skin facing surface of the locked flap 24 so that the fastener portion 27 can be attached and detached. The The fastener part 27 and the first receiving part 28 constitute a first fastening means 17 for connecting both side edges of the elastic waist belt 16 to each other.

  The elastic panel 20 intersects the rear end portion 52 of the absorption chassis 15 and extends continuously from the side edges 15c and 15d to the outside in the lateral direction X, and both sides of the first elastic region 41. Side inelastic area (inelastic area) 40 and a second inelastic area 42 located between the side inelastic area 40 and both side edges 16c, 16d. Further, in the central portion of the first elastic region 41, the waist elastic body 33 is not disposed at a portion intersecting with the rear end portion of the liquid absorbing structure 14 in the absorption chassis 15, and the central inelastic region 43 is formed. Defined. A waist elastic body 33 is disposed on the rear side in the front-rear direction Y with respect to the central inelastic region 43, and a rear central elastic region 44 is formed. Since the central inelastic region 43 is formed at the central portion of the elastic waist belt 16, the contraction of the waist elastic body 33 directly acts on the rear end portion of the liquid absorbing structure 14 that intersects the elastic waist belt 16. In addition, there is no possibility that the rear end portion is deformed or wrinkles are formed and the absorption performance is deteriorated.

  The first and second elastic regions 41 and 42 may be formed by arranging a stretchable sheet between the first and second sheets 31 and 32 in addition to arranging a string-like or strand-like elastic body. The entire elastic panel 20 may be formed from an elastic sheet. In the present invention, the “non-elastic region” is a region where the elastic force of the waist elastic body 33 made of a string-like, strand-like or sheet-like elastic material is not expressed, and the waist elastic body 33 is substantially elastic. It means a region where the portion (extractable functional portion) is not provided. In addition to snapback (the non-fixed portion of the elastic member that is not fixed to the sheet returns to the vicinity of the joint end that is fixed to the sheet by its own contraction) The waist elastic body 33 may be fixed in the elastic region, and a plurality of pieces may be cut together with the first and second sheets 31 and 32 to such an extent that the elastic force is not expressed.

The first and second sheets 31 and 32 can be formed from, for example, a liquid-impermeable SMS (spunbond / meltblown / spunbond) fiber nonwoven fabric or a spunbond nonwoven fabric having a mass of about 10 to 20 g / m ² . The waist elastic body 33 and the buttocks elastic material 84 to be described later are a plurality of strands having a thickness of about 300 to 1200 dtex, an expansion ratio of about 1.5 to 3.5 times, and a spacing dimension (pitch) of about 5 to 15 mm in the front-rear direction Y. Or an elastic material in the form of a string.

The locking flap 22 is formed by superimposing two sheets 46 and 47 made of, for example, a non-stretchable fiber nonwoven fabric or plastic sheet having a mass of about 20 to 60 g / m ² . The locking flap 22 is made of a sheet material having higher rigidity than the first and second sheets 31 and 32, and the locking flap 22 has higher rigidity than the elastic panel 20. Thereby, the flatness of the fastener part 27 is ensured, and there is no possibility that the fastener part 27 is deformed during the wearing operation and the fastening strength with the locked flap 24 is not lowered.

The locked flap 24 is formed of, for example, two sheets 48 and 49 formed from a non-stretchable fiber nonwoven fabric or plastic sheet having a mass of about 20 to 60 g / m ² . The locked flap 24 is made of a sheet material having higher rigidity than the first and second sheets 31 and 32, and has higher rigidity than the elastic panel 20. As a result, the flatness of the first receiving portion 28 located in the locked flap 24 is maintained, so that the first receiving portion 28 is deformed during the wearing operation, and the fastening area with the fastener portion 27 is reduced. Therefore, there is no fear that the fastening strength thereof is lowered.

  Referring to FIG. 4, the first receiving portion 28 to which the first fastener portion 27 of the locking flap 22 is detachably fixed is attached to the non-skin facing surface of the locked flap 24 of the elastic waist belt 16. A second receiving portion 75 is disposed on the non-skin facing surface side of the side inelastic region 40 and to which the second fastener portion 74 of the connection panel 68 is detachably fixed. The second fastener portion 74 and the second receiving portion 75 constitute second fastening means 18 for connecting the front end portion 51 of the absorption chassis 15 to the elastic waist belt 16.

  The first and second fastener portions 27 and 74 are formed of a sheet material having a relatively high rigidity and tensile strength, such as a plastic film, and have a hook group of mechanical fasteners. Further, the first and second fastener portions 27 and 74 are formed by applying an adhesive instead of the hook element group when the outer surfaces of the locked flap 24 and the belt portion 26 are formed of a plastic film. It can also be formed. The first and second receiving portions 28 and 75 are formed on a base sheet made of a sheet material having relatively high rigidity and tensile strength, such as a plastic film, a fiber nonwoven fabric, and a laminate thereof, and a surface of the base sheet. Formed from the loop elements of the arranged mechanical fasteners. However, when the base sheet is formed from a fiber nonwoven fabric, it does not have to have a mechanical loop element. Further, when the first and second fastener portions 27 and 74 have hook elements, a fiber nonwoven fabric includes a sheet 49 that forms the outer surface of the locked flap 24 and a second sheet 32 that forms the outer surface of the belt portion 26. The first and second fastener portions 27 and 74 can be directly attached to the sheet.

  While the elastic waist belt 16 is formed with a sufficiently large elastic region, the side non-elastic region 40 is provided between the first and second elastic regions 41 and 42, so that the fastening force of the second fastening means 18 can be reduced. Reduction is prevented. That is, in order for the second fastener portion 74 to be stably fixed at the second receiving portion 75, the area where the hook element of the second fastener portion 74 and the loop element of the second receiving portion 75 engage with each other. It is necessary for the second receiving portion 75 itself to maintain flatness to such an extent that can be sufficiently secured. However, when the second receiving portion 75 is located in the first or second elastic region 41, 42 and is deformed along with its expansion and contraction and the surface has an uneven shape, the loop element is engaged with the hook element in the recess. Otherwise, the fastening strength between the second fastener portion 74 and the second receiving portion 75 may be reduced. In this embodiment, since the 2nd receiving part 75 is located in the side inelastic area 40, the 2nd receiving part 75 does not deform | transform by shrinkage | contraction of the 1st and 2nd elastic areas 41 and 42, but planarity is. Since it is held, the second fastening means 18 can exert a required fastening force.

  Referring to FIG. 3, the elastic panel 20 includes a first sheet 31 positioned on the skin facing surface side and a second sheet 32 positioned on the non-skin facing surface side, and the first and second sheets 31 and 32. Are fixed to each other via a hot-melt adhesive applied to either one of the opposing surfaces. The first and second sheets 31 and 32 have the same shape and the same size, and are formed with front and rear end edges 16a and 16b extending in parallel in the lateral direction X when fixed to each other. As described above, the front edge 16a has a shape in which the central portion in the lateral direction X is convex in a trapezoidal shape toward the front. The trapezoidal portion of the front edge 16a has a substantially symmetric trapezoidal shape in which the length of the lower side is larger than the horizontal dimension of the absorption chassis 15 and the length of the upper side is substantially equal to the horizontal dimension of the absorption chassis 15. . The length of the lower side of the trapezoidal part is usually in the range of about 40% to about 60% of the length of the elastic waist belt 16 in the lateral direction X, but can be wider.

  As shown in FIGS. 2 and 3, the rear end portion 52 of the absorbent chassis 15 is overlapped and fixed to the trapezoidal portion of the front end edge 16 a of the first and second sheets 31 and 32. At this time, due to the trapezoidal portion of the front edge 16a that does not overlap the absorbent chassis 15, the front edge 16a extending in the lateral direction X of the elastic waist belt 16 and the side edges 15c, 15d extending in the front-rear direction of the absorbent chassis 15 A pair of collar cover portions 80 interposed therebetween are defined. At this time, the contour edge 83 of the buttock cover portion 80, that is, the oblique side of the trapezoidal portion extends forward obliquely from the front end edge 16 a extending in the lateral direction X to both sides of the absorption chassis 15 located in the crotch region 13. It reaches the edges 15c and 15d. The shape of the contour edge 83, that is, the shape of the oblique side of the trapezoidal portion of the front end edge 16a may be a straight shape or a curved shape such as a shape curved toward the inside of the diaper 10.

  Between the first sheet 31 and the second sheet 32 other than the trapezoidal portion, a plurality of waist elastic bodies 33 extending in the lateral direction X are disposed, and the elastic panel 20 can be expanded and contracted at least in the lateral direction X. It is made elastic. Further, between the first and second sheets 31 and 32 of the trapezoidal portion, a plurality of string-like or strand-like collar elastic material 84 expands and contracts in a direction parallel to the contour edge 83 of the collar cover portion 80. It is fixed as possible. The plurality of rib elastic materials 84 extend in an oblique direction from the elastic waist belt 16 toward the side edge portions 14 a and 14 b of the liquid absorbing structure 14 in the rib cover portion 80. Thereby, elasticity is provided to the buttock cover portion 80. Moreover, since a pair of buttocks cover part 80 is extended to the side edges 15c and 15d of the absorption chassis 15 located in the crotch area 13, when the diaper 10 is worn, the buttocks cover part 80 serves as a wearer's buttocks. It can cover and fit widely, and can look like underwear in the rear view.

  Further, the leg elastic body 62 and a part of the plurality of rib elastic materials 84 intersect each other at both side edges 15c and 15d of the absorption chassis 15, so that the leg elastic body 62 and a part of the rib elastic material 84 are interlocked. Can be expanded and contracted. Thereby, in the wearing state of the diaper 10, the absorption chassis 15 whole is pulled up back, and it can be made to fit more according to a motion of a wearer's body. Furthermore, since another part of the buttocks elastic material 84 intersects the side edges 14a and 14b of the liquid absorbing structure 14, the tension of the buttocks elastic material 84 acts in the lateral direction X of the liquid absorbing structure 14. Generation of wrinkles in the liquid absorbing structure 14 is suppressed.

Second Embodiment
The diaper 10 having the buttock cover portion 80 of the present invention has been described based on the first embodiment, but the buttock cover portion 80 according to the present invention is not limited to this, and can be implemented with various modifications. For example, as shown in FIG. 5, the collar elastic material 84 of one collar cover part 80 and the collar elastic material 84 of the other collar cover part 80 are passed between the side edges 14 a and 14 b of the liquid absorbing structure 14. Can be connected to each other. The collar cover portion 80 having such a configuration is suitable when a pair of collar cover portions 80 are integrally formed on the same sheet member. In this embodiment, the buttocks elastic material 84 located in the buttocks cover part 80 is fixed between the first and second sheets 31 and 32 so as to be stretchable by a known means such as a hot melt adhesive. On the other hand, the collar elastic material 84 located between the side edges 14a and 14b of the liquid absorbing structure 14 between the pair of collar covers 80 can be expanded and contracted between the first and second sheets 31 and 32. It may be fixed or may not be fixed at all. In addition, the collar elastic material 84 positioned between the side edges 14a and 14b of the liquid absorbing structure 14 may be fixed between the second sheets 31 and 32 under non-extension, that is, with little tension. it can. In addition, the hip elastic material 84 is temporarily fixed between the first and second sheets 31 and 32 so as to be stretchable and then cut into a non-elastic region, or the hip elastic material 84 is used as the first and second sheets. It is also possible to snap back without fixing between the sheets 31 and 32 at all.

<Third Embodiment>
As shown in FIG. 6, the collar cover portion 80 can also be stretched by extending the collar elastic material 84 of the collar cover portion 80 in the lateral direction X. In the buttock cover portion 80, the buttock elastic material 84 is fixed between the first and second sheets 31 and 32 so as to be stretchable. In this embodiment, since the end of the buttocks elastic material 84 is located at the contour edge 83 that is a free edge of the buttocks cover portion 80, even when a force is applied to the buttocks cover portion 80 when the diaper 10 is used, the buttocks elastic material 84 is used. The elongation rate of the material does not change much. For this reason, the wearer's buttocks are not excessively pressed by the shrinkage of the buttocks elastic material 84. 6 shows a case where the collar elastic material 84 is not connected between the side edge portions 14a and 14b of the liquid absorbing structure 14. However, in this embodiment as well, a pair of The flange elastic material 84 can be connected to each other through the side edges 14a and 14b of the liquid absorbing structure 14.

<Fourth embodiment>
As shown in FIG. 7, by extending a part of the waist elastic body 33 on the buttock cover portion 80 in an oblique direction and also using the buttock elastic material 84, elasticity can be imparted to the buttock cover portion 80. it can. In this embodiment, a part of the waist elastic body 33 extending in the lateral direction X in the vicinity of the front end edge 16 a of the elastic waist belt 16 is transferred from the elastic waist belt 16 to the side edges 14 a and 14 b of the liquid absorbing structure 14. It is made to extend on the buttock cover part 80. In the buttock cover portion 80, the buttock elastic material 84 is fixed between the first and second sheets 31 and 32 so as to be stretchable. Further, in this embodiment, the interval between the plurality of rib elastic materials 84 gradually becomes wider as the distance from the side edge portions 14a and 14b of the liquid absorbing structure 14 increases. That is, since the space | interval of the multiple ribs elastic material 84 becomes gradually wide so that it may match the shape of a hip, it can prevent that a wearer's buttocks are pressed too much by the hip elastic material 84. FIG. FIG. 7 illustrates a case where the pair of flange elastic materials 84 are not connected to each other between the side edge portions 14a and 14b of the liquid absorbing structure 14, but this embodiment is also the same as the second embodiment. Thus, the pair of flange elastic materials 84 can be connected to each other through the side edge portions 14a and 14b of the liquid absorbing structure 14.

  The present invention can be implemented in various forms other than the above-described embodiment. For example, the collar cover portion 80 may be formed from a panel separate from the central portion 25 and the belt portion 26. Moreover, when the stretchability is imparted to the buttock cover portion 80, both the buttock elastic material 84 and the waist elastic body 33 may be used.

  In addition to the materials described in the present specification, various known materials that are usually used in this type of article can be used for each constituent member of the diaper 10 without limitation. Further, in the specification and claims of the present invention, the terms “first” and “second” are used only to distinguish similar elements and positions.

The disclosure relating to the present invention described above can be summarized in at least the following matters.
Longitudinal and transverse directions perpendicular to each other, and the front waist region, a rear waist region, and a crotch region extending between said front and rear waist regions, and an elastic waist belt extending in the lateral direction, intake extending in the longitudinal direction and a absorbent chassis hydraulic structure is located, said rear end portion of the absorbent chassis a said lateral open-type disposable diaper which is connected to a central portion of the elastic waist belt, of the elastic waist belt A front edge extending in the lateral direction; a contour edge extending obliquely from the front edge to reach both side edges of the absorbent chassis located in the crotch region; and the both side edges extending in the front-rear direction of the absorbent chassis And the pair of buttock cover portions arranged in a direction parallel to the contour edge, spaced apart from each other. By hip elastic material of the building plural rows are telescopically fixed, have a resilient as a whole, the leg elastic body, stretchable along a concave-shaped portion of said side edges positioned in the crotch region Whereas the number of the buttocks elastic material is larger than the number of the leg elastic bodies, and the buttocks elastic material extends obliquely in a straight line along the straight contour edge The leg elastic body is gently curved along the concave curved portion .

The above invention can include at least the following embodiments.
(1) even without least a portion the hip elastic material, intersects the side edge portions extending in the longitudinal direction of the absorbent structure.
(2) the said leg elastics at the side edges of the absorbent chassis and the buttocks elastic material intersect.
( 3 ) Of the pair of collar cover parts, the collar elastic material of one collar cover part and the collar elastic material of the other collar cover part are between the side edges of the liquid absorbing structure. Are connected to each other.

DESCRIPTION OF SYMBOLS 10 Diaper 11 Front waist region 12 Rear waist region 13 Crotch region 14 Liquid absorption structure 14a, 14b Side edge 15 of liquid absorption structure Absorption chassis 15c, 15d Side edge 16 of absorption chassis Elastic waist belt 17 First fastening means 18 Second fastening means 22 Locking flap 24 Locked flap 25 Central portion 26 of elastic waist belt Belt portion 27 First fastener portion (fastener portion)
28 First receiving part (receiving part)
41 First elastic region 42 Second elastic region 43 Central inelastic region (inelastic region)
51 Front end portion 52 of the absorption chassis 52 Rear end portion 53 of the absorption chassis 62 Middle portion of the absorption chassis 62 Leg elastic body 65 Liquid absorption layer 66 Body side liner 73 Front center elastic region 74 Second fastener portion (fastener portion)
75 Second receiving part (receiving part)
80 buttock cover part 83 contour edge 84 buttock elastic material X transverse direction Y longitudinal direction

Claims (4)

Longitudinal and transverse directions perpendicular to each other, and the front waist region, a rear waist region, and a crotch region extending between said front and rear waist regions, and an elastic waist belt extending in the lateral direction, intake extending in the longitudinal direction and a absorbent chassis hydraulic structure is located, the rear end portion of the absorbent chassis a said lateral open-type disposable diaper which is connected to a central portion of the elastic waist belt,
A front end edge extending in the lateral direction of the elastic waist belt, a contour edge extending obliquely from the front end edge to both side edges of the absorption chassis located in the crotch region, and the front-rear direction of the absorption chassis A pair of heel cover portions defined by both side edges extending to
The pair of buttock cover part, spaced apart from one another, by the hip elastic material plural rows extending in a direction parallel with the contour edge is stretchable to a fixed, have a resilient as a whole,
A leg elastic body is joined so as to be stretchable along the concave curved portions of the side edges located in the crotch region,
Whereas the number of the buttocks elastic material is larger than the number of the leg elastic bodies, and the buttocks elastic material extends linearly and obliquely along the straight contour edge, the leg elastic bodies open- type disposable diaper characterized by being gently curved along the portion of the concave shape. Wherein some even without least hip elastic material, diaper according to 請 Motomeko 1 you intersect the side edges extending in the longitudinal direction of the absorbent structure. The diaper according to 請 Motomeko 1 or 2 and the leg elastic member and the hip elastic material you intersect at the opposite side edges of said absorbent chassis. The collar elastic material of the collar cover part of one of the pair of collar cover parts and the collar elastic material of the collar part cover part of each other pass between the side edges of the liquid-absorbing structure. the diaper according to any of the concatenated Ru請 Motomeko 1-3.

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