JP2010082364A - Pants type disposable diaper - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pants type disposable diaper for which pressurizing feelings given to a wearer when it is worn are reduced. <P>SOLUTION: The pants type disposable diaper comprises a front body, a back body and a crotch part, at least the crotch part is provided with an absorbent body, and an opening around the waist and openings around legs are formed by bonding the front body and the back body with each other at both sides. The vicinity of the opening around the waist is turned to the double structure of a wearer side part where a flexible material around the waist is not disposed and an upper tightening part where the flexible material around the waist is disposed. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a pants-type disposable diaper. More specifically, the present invention relates to a pants-type disposable diaper that reduces the feeling of pressure given to the wearer during wearing.

  A pants-type disposable diaper is generally composed of a front body, a back body, and a crotch, and is provided with an absorbent body at least at the crotch, and the front body and the back body are joined to each other at both sides, thereby opening an opening around the waist. A leg periphery opening is formed.

  In the techniques disclosed in Patent Documents 1 and 2, in addition to the above configuration, a plurality of waistline elastic members extending in the waistline direction are attached to the edge of the waistline opening in the waistline region in an expanded state. ing. In addition, a plurality of leg stretchable members extending in the leg circumference direction are attached to the edge of the leg circumference opening in an extended state. A plurality of auxiliary elastic members extending in the direction of the waist between the longitudinal side edges of the front and rear waist regions are attached between the waist elastic material and the edge of the leg periphery opening.

Japanese Patent Application Laid-Open No. 07-236650 Japanese Patent Laid-Open No. 11-140705

  In these pants-type disposable diapers, in order to prevent a shift at the time of wearing, an elastic material around the waist is attached in an extended state, and a considerable elastic force acts. For this reason, the wearer's skin may be marked with rubber marks or irritation by rubbing.

  As a result of diligent studies to solve the problems of the prior art as described above, the present inventor has conceived that the above problems can be solved by a pants-type disposable diaper shown below, and completed the present invention. Specifically, the following pant-type disposable diapers are provided by the present invention.

[1] It consists of a front body, a back body, and a crotch part, and is provided with an absorbent body at least at the crotch part. A waist-type elastic diaper is provided in the vicinity of the waist-opening diaper, and an upper fastening part in which a waist-side elastic material is provided and a waist-type elastic material is provided. A pants-type disposable diaper that has a double structure.

[2] The pants-type disposable diaper according to [1], wherein the absorber reaches the vicinity of a waist opening.

[3] A waist flap extends from the waist opening, and a waist elastic material is disposed at a predetermined width from the tip of the waist flap, and the waist flap is bent outward. The pants-type disposable diaper according to [1] or [2], wherein the pants-type disposable diaper acts as an upper tightening portion.

[4] A waist flap extends from the waist opening, and a waist elastic material is not disposed on the waist flap, and the waist flap is folded inward to wearer side. The pants-type disposable diaper according to the above [1], which acts as a part.

[5] The upper tightening portion in which the elastic material around the waist is disposed includes a front body, a back body, and a crotch portion, and an absorber is provided at least at the crotch portion, and the front body and the back body are mutually connected on both sides. The pants-type disposable diaper according to the above [1] or [2], which is separated from the pants-type disposable diaper main body formed with the waist circumference opening and the leg circumference opening.

  The pants-type disposable diaper according to the present invention employs the wearer's side portion on which the elastic material around the waist is not disposed, so that the wearer is less likely to make rubber marks or to be irritated by rubbing. Prevention of slipping during wearing is realized by the elastic material around the waist of the upper tightening portion, but the feeling of tightening is reduced by the presence of the wearer side portion between the elastic material and the skin of the wearer.

  Moreover, according to the embodiment of the present invention in which the waist flap is extended in the opening around the waist, there is an effect that the manufacturing is simple. Moreover, since the effect of this invention can be acquired only by folding back a waist flap part inside or outside, use is also easy.

  Hereinafter, the best mode for carrying out the absorbent article of the present invention will be described more specifically. However, the present invention broadly encompasses pants-type diapers having the invention-specific matters, and is not limited to the following embodiments.

[1] Definitions etc .:
The “pants-type disposable diaper” means that the corresponding side edges 2a, 6a (2b, 6b) of the front body 2 and the back body 6 are joined to each other like the pants-type disposable diaper 1 shown in FIGS. By doing so, one waist circumference opening part 10 and a pair of leg circumference opening parts 12 (12a, 12b) shall be formed, and it shall mean the disposable diaper comprised beforehand by the underpants type.

  In addition, the “two-piece type” means an absorbent main body formed in a pad shape with an absorbent body included between the top sheet and the back sheet as in the pants-type disposable diaper 1 shown in FIGS. 14 and a pants-shaped exterior sheet 16 having one waist opening 10 and a pair of leg openings 12a and 12b, and the absorbent main body 14 is disposed and fixed inside the exterior sheet 16. It shall mean the form.

  As shown in FIG. 2, the “front body” means a portion (reference numeral 2 in the figure) that covers the wearer's abdomen (front of the body) when worn on the wearer, and “inseam” means the wearer The part that covers the inseam of the wearer when attached to the wearer (reference numeral 4 in the figure), and the “rear body” is the part that covers the wearer's back side (back of the body) when worn on the wearer (in the figure) It shall mean 6).

[2] Configuration of the pants-type disposable diaper of the present invention:
The configuration of the pants-type disposable diaper according to the first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a schematic perspective view of a pants-type disposable diaper according to an embodiment of the present invention. Moreover, FIG. 2 is a schematic plan view of the pants-type disposable diaper according to one embodiment of the present invention, and is a diagram illustrating a state in which the pants-type disposable diaper of FIG. 1 is developed and viewed from the inside (absorber side). is there. Furthermore, FIG. 3 is a schematic cross-sectional view of the underpants-type disposable diaper according to an embodiment of the present invention in use, and shows a cross-sectional view taken along II in FIG. 2 in use. The pants-type disposable diaper of the present invention comprises a front body 2, a back body 6, and a crotch part 4, and is provided with an absorbent body (absorbent body 14) in at least the crotch part 4, and the front body 2 and the back body 6 are both side edges. (2a, 2b, 6a and 6b) is a pants-type disposable diaper in which a waist circumference opening 10 and a leg circumference opening 12 (12a, 12b) are formed, The vicinity of the opening 10 has a double structure of a wearer side portion 48 where the waist elastic member 42 is not disposed and an upper tightening portion 46 where the waist elastic member 42 is disposed.

  In this embodiment, a waist flap 52 extends from the waist opening 10, and a waist elastic material 42 is disposed on the waist flap 52 at a constant width from the tip. 52 is bent outward along the folding line 50 to act as the upper fastening portion 46. The perspective view of FIG. 1 shows a state in which the waist flap 52 is bent outward along the folding line 50.

  Moreover, in this embodiment, the absorber (absorbent main body 14) has reached the waist opening 10 vicinity. The waist flap 52 extends from the waist opening 10 and the waist elastic member 42 is provided on the waist flap 52, while the waist elastic member 42 is provided on the wearer side 48. It can be easily realized by not having it. And by this structure, since absorber length can be arrange | positioned long, the edge part leak from a back stomach can be prevented. Moreover, if it is set as such a structure, the waist surrounding elastic material 42 of the upper clamp | tightening part 46 will give the wearer's skin the pressure by tension | tensile_strength via an absorber, but a wearer exists by presence of an absorber. Gives almost no feeling of tightening. Note that the absorber reaches the vicinity of the waist opening, in addition to the case where the longitudinal end of the absorber completely reaches the waist opening, and the longitudinal end of the absorber is 3 cm from the waist opening. This includes cases where it is within the range.

[3] Components of a pants-type disposable diaper:
The absorbent article of the present invention is composed of an absorbent body, a top sheet 18 that is at least partially made of a liquid-permeable material and arranged to cover the surface of the absorbent body, a liquid-impermeable material, and the absorbent body. The back sheet | seat arrange | positioned so that the back surface of this may be coat | covered.

[3-1] Various elastic materials:
When the absorbent article of the present invention is a disposable diaper, it is preferable to dispose a leg elastic member and a waist elastic material.

  The waist elastic member 42 is an elastic material disposed on the upper fastening portion 46 in the vicinity of the waist opening. By arranging the elastic material around the waist, a gather (waist gather) rich in elasticity can be formed in the waist opening. This waist gather makes it difficult for gaps to be formed around the waist and prevents urine leakage from around the waist. In addition, the fit of the diaper to the wearer is improved, and the diaper is prevented from falling down.

  For example, the pants-type disposable diaper shown in FIGS. 1 to 3 is an example in which a waist flap 52 is extended in the waist opening 10 of the diaper, and a plurality of waist elastic members 42 are disposed on the waist flap 52. .

  An abdominal circumference elastic material is an elastic material arrange | positioned in the part (namely, part equivalent to a wearer's abdominal circumference) between a waist circumference opening part and a leg circumference opening part. By arranging the elastic material around the abdomen, it is possible to form a highly elastic tammy gather around the abdomen of the wearer. This Tammy Gather, together with West Gather, can make the diaper fit and anti-slip effect even better.

  The pants-type disposable diaper 1 shown in FIG. 1 to FIG. 3 has a portion between the waist opening 10 and the leg opening 12 (that is, a portion corresponding to the wearer's belly) around the wearer's belly. This is an example in which a plurality of belly stretchable members 44 are arranged so as to surround the.

  The leg circumference elastic material is an elastic material arranged along the leg circumference opening. By arranging the leg-stretchable material, a gather (leg gather) rich in stretchability can be formed in the leg-surrounding opening. Therefore, it is difficult to form a gap around the leg, and urine leakage from the opening around the leg can be effectively prevented.

  For example, the pants-type disposable diaper 1 shown in FIG. 1 to FIG. 3 is an example in which leg gathers are formed in a curved manner along the curve of the leg opening 12 of the diaper to form leg gathers. The leg-surrounding elastic member 40 is made of thread rubber or flat rubber.

  It is preferable that the leg-surrounding elastic material 40 is formed in the part outside the standing line of the three-dimensional gather 26 like the underpants type disposable diaper 1 shown in FIGS. 1-3, for example. With such a configuration, it is possible to improve the wearing feeling and wearing feeling of the crotch part while ensuring a sufficient leakage preventing effect of the three-dimensional gather.

  For these stretchable materials, after considering the degree of gather shrinkage, etc., the constituent material, the stretch rate of the material, the stretched state when fixed, etc. may be determined.

  As an elastic material, the elastic material which has been used with the conventional disposable diaper can be used conveniently. Specific examples include elastic rubber, elastic film, elastic foam (urethane foam, etc.), etc. in addition to natural rubber flat rubber and synthetic rubber (urethane rubber, etc.) elastic thread. it can.

  The elastic material is preferably fixed in an extended state in order to exert a sufficient elastic force. For example, when the elastic material is a flat rubber made of natural rubber or a rubber thread made of an elastic thread of synthetic rubber, it is preferably fixed in an extended state of 120 to 400%, and fixed in an extended state of 200 to 300%. More preferably. By fixing in the extended state in such a range, it is possible to apply a sufficient expansion / contraction force without applying an excessive tightening force to the wearer.

  The stretchable material as described above is fixed to other constituent members of the diaper by an adhesive or other means. The fixing method may be, for example, adhesion using a hot melt adhesive or other highly fluid adhesive, or may be welding by heat such as heat sealing or ultrasonic waves.

[3-2] Absorber:
The “absorber” is a member for absorbing and holding the wearer's urine and the like, and is made of an absorbent material.

  Examples of the “absorbent material” include fluff pulp, super absorbent polymer (hereinafter referred to as “SAP”), a hydrophilic sheet, and the like. “Fluff pulp” is made by pulverizing wood pulp or non-wood pulp into cotton, “SAP” is sodium polyacrylate, “Hydrophilic sheet” is tissue, absorbent paper, hydrophilized It is preferable to use a non-woven fabric that has been treated.

  As the absorber, it is preferable to use one or two or more absorbent materials formed into a single-layer or multi-layer mat. Especially, what combined 10-500 mass parts SAP with respect to 100 mass parts of fluff pulp is preferable. In particular, it is preferable to use an absorber having a high SAP ratio in which 40 to 80 parts by mass of SAP is used in combination with 100 parts by mass of fluff pulp. At this time, the SAP may be mixed in the fluff pulp mat or used in a layered manner between the fluff pulp mats.

  The absorber can be used after being molded into a desired shape such as a rectangular shape, an hourglass shape, a gourd shape, or a T-shape. The absorber is preferably encapsulated with a hydrophilic sheet for the purpose of preventing SAP from falling off and imparting shape stability. Usually, the absorber is sandwiched between a top sheet and a back sheet, and used in a state of being integrated with both sheets.

[3-3] Top sheet:
Since the top sheet needs to allow the wearer's urine or the like to pass therethrough, at least a part (all or a part) of the top sheet is made of a liquid-permeable material.

  Examples of the “liquid permeable material” include woven fabric, non-woven fabric, and porous film. Among these, it is preferable to use a nonwoven fabric made of a thermoplastic resin such as polypropylene, polyethylene, polyester, aliphatic polyamide, etc., which has been subjected to a hydrophilic treatment.

  As the “nonwoven fabric”, a nonwoven fabric produced by a production method such as air through (card hot air) or card embossing can be suitably used. The “hydrophilic treatment” can be performed by applying, spraying, impregnating, etc. a surfactant.

  The top sheet is preferably “at least partly”, more specifically, when the top sheet is viewed in plan, at least the vicinity of the surface of the absorber is made of a liquid-permeable material.

  In addition, the sheet | seat located in the wearer's skin side of an absorbent article does not need to be comprised with all the top sheets. That is, the sheet in contact with the wearer's skin may be constituted by a plurality of sheets including the top sheet, and the top sheet and other sheets may be joined together in the surface direction of the sheet.

[3-4] Backsheet:
A backsheet is a sheet | seat arrange | positioned so that the back surface (surface located in the side far from a wearer's skin at the time of mounting | wearing of a diaper) may be coat | covered. The back sheet is made of a liquid-impermeable material because it is necessary to prevent the wearer's urine from leaking outside the diaper.

  There is no restriction | limiting in particular about the arrangement position of a back seat | sheet. From the viewpoint of preventing leakage of urine absorbed by the absorber, it is preferable that a back sheet is disposed at least in a portion where the absorber exists.

  Examples of the liquid-impermeable material constituting the backsheet include a liquid-impermeable film made of a resin such as polyethylene. Among these, a microporous polyethylene film is preferably used. This microporous polyethylene film has a large number of fine pores of 0.1 to several μm, and is liquid impervious but has moisture permeability, so that the inside of the diaper can be prevented from being steamed There is.

  Examples of the material constituting the cover sheet include woven fabric and non-woven fabric. Especially, it is preferable to use the dry nonwoven fabric and wet nonwoven fabric which consist of thermoplastic resins, such as polyethylene, a polypropylene, and polyester.

[3-5] Solid gather:
The absorbent article of the present invention is preferably made of a water-repellent sheet and includes at least a pair of three-dimensional gathers arranged on both sides of the absorbent body.

  The structure of a three-dimensional gather can employ | adopt the structure used for the conventional disposable diaper and other absorbent articles. For example, as in the pants-type disposable diaper 1 shown in FIG. 2, an elastic material (three-dimensional gather elastic material 36) is sandwiched and fixed between layers of the water-repellent sheet 32, and gathers (襞) And the like can be suitably used. In this example, the three-dimensional gather stretchable material 36 is sandwiched and fixed to the folded portion of the water-repellent sheet 32.

  The three-dimensional gather may be separately provided with a water-repellent sheet for three-dimensional gather as described above, or may be formed by a part of the sheet material constituting the diaper. For example, the pants-type disposable diaper 1 shown in FIG. 2 is an example in which the three-dimensional gathers 26 a and 26 b are formed by a part of the water-repellent sheet 32 constituting the side sheet 19. The water-repellent sheet may be a nonwoven fabric produced by a production method such as card embossing or spunbonding, but a nonwoven fabric sheet such as SMS or SMMS having a high waterproof property is more preferable.

[4] Other Embodiments [4-1] Second Embodiment FIG. 4 is a schematic plan view of a pants-type disposable diaper according to a second embodiment of the present invention, in which a pants-type disposable diaper is developed. It is a figure which shows the state seen from the inner side (absorber side). FIG. 5 is a schematic cross-sectional view showing a cross section taken along line II-II in FIG. 4 in a use state of the pants-type disposable diaper shown in FIG. In the second embodiment, the abdominal circumference elastic member 44 in the first embodiment is omitted. By comprising in this way, the tightening feeling from the abdomen to the back can be eliminated.

[4-2] Third Embodiment FIG. 6 is a schematic plan view of a pants-type disposable diaper according to a third embodiment of the present invention, in which the pants-type disposable diaper is developed from the inside (absorber side). It is a figure which shows the state seen. FIG. 7 is a schematic cross-sectional view showing a cross section taken along line III-III in FIG. 6 in a use state of the pants-type disposable diaper shown in FIG. In the third embodiment, the waist flap 52 in the second embodiment is further extended, and the upper tightening portion 46 is extended. By comprising in this way, a fit feeling around a wearer's belly can be heightened. Moreover, since it acts on a wearer's belly circumference via the wearer side part 48, a feeling of clamping is reduced.

[4-3] Fourth Embodiment FIG. 8 is a schematic plan view of a pants-type disposable diaper according to a fourth embodiment of the present invention, where the pants-type disposable diaper is developed and viewed from the inside (absorber side). FIG. FIG. 9 is a schematic cross-sectional view showing a cross-section taken along IV-IV in FIG. 8 in a use state of the pants-type disposable diaper shown in FIG. In the fourth embodiment, the leg-surrounding elastic member 40 in the third embodiment is omitted. By comprising in this way, a wearer's tightening feeling is further reduced.

[4-4] Fifth Embodiment FIG. 10 is a schematic perspective view of a pants-type disposable diaper according to a fifth embodiment of the present invention. In the fifth embodiment, the upper fastening portion 46 is separate from the pants-type disposable diaper main body 1. At the time of use, the upper fastening part 46 is overlapped with the pants-type disposable diaper main body in the direction of arrow W in FIG. Also by comprising in this way, the effect of this invention that a feeling of fastening to a wearer is reduced can be acquired.

[4-5] Sixth Embodiment FIG. 11 is a schematic plan view of a pants-type disposable diaper according to a sixth embodiment of the present invention, where the pants-type disposable diaper is developed and viewed from the inside (absorber side). FIG. FIG. 12 is a schematic cross-sectional view showing a cross section taken along line V-V in FIG. 11 when the pants-type disposable diaper shown in FIG. 11 is in use. In the sixth embodiment, the absorber in the first embodiment has a length comparable to that of the conventional one. Also by comprising in this way, the effect of this invention that a feeling of fastening to a wearer is reduced can be acquired.

[4-6] Seventh Embodiment FIG. 13 is a schematic plan view of a pants-type disposable diaper according to a seventh embodiment of the present invention, where the pants-type disposable diaper is developed and viewed from the inside (absorber side). FIG. FIG. 14 is a schematic cross-sectional view showing a cross-section taken along VI-VI in FIG. 13 in the usage state of the pants-type disposable diaper shown in FIG. In the seventh embodiment, in the sixth embodiment, the waist elastic member 42 disposed in the waist flap 52 is abolished, while the waist elastic member 42 is disposed in the same portion as the conventional technique. It is. At the time of use, the waist flap 52 is made to act as the wearer side portion 48 by folding the waist flap 52 inward (wearer side) from the folding line 50. Also by comprising in this way, the effect of this invention that a feeling of fastening to a wearer is reduced can be acquired.
[5] Manufacturing method:
Hereinafter, an example of the method of manufacturing the disposable diaper which concerns on one Embodiment of this invention is demonstrated by the example in the case of manufacturing the underpants type disposable diaper shown in FIGS. 1-3.

[5-1] Production of absorbent main body:
An absorber wrapped in a hydrophilic sheet is disposed on the upper surface of the back sheet, and a top sheet is further disposed on the upper surface. Subsequently, the absorptive main body 14 is obtained by sealing so that the peripheral part of an absorber may be pinched | interposed with a top sheet and a back sheet.

[5-2] Production of solid gathers:
One end of the sheet material 32a (32b) is folded, and the three-dimensional gathers 26a (26b) are bonded together by sandwiching the two three-dimensional gather elastic members 36a, 36b (36c, 36d) between the folded portions. Get. Place the stretchable material side of the resulting three-dimensional gather as the free end to be the center side of the absorbent main body, fix the absorbent main body side and the sheet material, and fix the free end in the longitudinal direction to the absorbent main body To do.

[5-3] Production of exterior member:
First, two nonwoven fabrics to be the exterior member 16 are prepared, and a waist elastic member 42, an abdominal elastic member 44, and a leg elastic member 40 are disposed and bonded and fixed to the upper surface of one of the nonwoven fabrics. Further, another nonwoven fabric is laminated and fixed on the upper surface, so that the waist elastic member 42, the belly elastic member 44, and the leg elastic member 40 are interposed between the two nonwoven fabrics. The exterior member 16 is obtained.

[5-4] Manufacture of disposable diapers:
The absorbent main body 14 is disposed and fixed near the crotch portion of the exterior member 16. Next, the absorbent body 14 is turned inside, the front body 2 and the back body 6 are folded together so that the front body 2 and the back body 6 are matched, and the front body 2 and the back body 6 are joined by means such as heat sealing to form a joined portion. By this, the disposable diaper 1 shown in FIGS. 1-3 can be manufactured.

  The series of steps as described above can be continuously performed by mechanical means. For example, by adopting a method / apparatus such as continuously feeding a long sheet material or stretchable material from a roller, it becomes possible to continuously manufacture disposable diapers, which contributes to an improvement in productivity.

  The pants-type disposable diaper of the present invention can be suitably used for an adult such as an elderly person or a disabled person for infants or those who need care.

It is a typical perspective view of the underpants type disposable diaper concerning one embodiment of the present invention. It is a typical top view of a pants type disposable diaper concerning one embodiment of the present invention, and is a figure showing the state where a pants type disposable diaper was developed and it looked from the inner side (absorber side). It is a typical sectional view of a pants type disposable diaper concerning one embodiment of the present invention, and is a figure showing the situation of a section which cut a pants type disposable diaper in use state by II in Drawing 2. It is a schematic top view of the underpants type disposable diaper which concerns on 2nd embodiment of this invention, and is a figure which shows the state which expand | deployed the underpants type disposable diaper and was seen from the inner side (absorber side). It is a typical sectional view of a pants type disposable diaper concerning a second embodiment of the present invention, and is a figure showing a situation of a section which cut a pants type disposable diaper of Drawing 4 in use state by II-II in Drawing 4. . It is a typical top view of the underpants type disposable diaper concerning a third embodiment of the present invention, and is a figure showing the state where the underpants type disposable diaper was developed and it looked from the inside (absorber side). It is a typical sectional view of a pants type disposable diaper concerning a third embodiment of the present invention, and is a figure showing a situation of a section which cut a pants type disposable diaper of Drawing 6 in use state by III-III in Drawing 6. . It is a typical top view of a pants type disposable diaper concerning a 4th embodiment of the present invention, and is a figure showing the state where a pants type disposable diaper was developed and it looked from the inside (absorber side). It is a typical sectional view of the underpants type disposable diaper concerning a 4th embodiment of the present invention, and is a figure showing the situation of the section which cut the underpants type disposable diaper of Drawing 8 in use state by IV-IV in Drawing 8. . It is a typical perspective view of the underpants type disposable diaper which concerns on 5th embodiment of this invention. It is a schematic top view of the underpants type disposable diaper which concerns on 6th embodiment of this invention, and is a figure which shows the state which expand | deployed the underpants type disposable diaper and was seen from the inner side (absorber side). It is a typical sectional view of the underpants type disposable diaper concerning a 6th embodiment of the present invention, and is a figure showing the situation of the section which cut the underpants type disposable diaper of Drawing 11 in use state by VV in Drawing 11. . It is a schematic top view of the underpants type disposable diaper which concerns on 7th embodiment of this invention, and is a figure which shows the state which expand | deployed the underpants type disposable diaper and was seen from the inner side (absorber side). It is a typical sectional view of the underpants type disposable diaper concerning a 7th embodiment of the present invention, and is a figure showing the situation of the section which cut the underpants type disposable diaper of Drawing 13 in use state by VI-VI in Drawing 13. .

Explanation of symbols

1: Pants-type disposable diaper (main body), 2: front body, 2a, 2b: side edge, 4: crotch, 6: back body, 6a, 6b: side edge, 8: joint, 10: waist opening , 12, 12a, 12b: leg opening, 14: absorbent main body, 16: exterior sheet, 18: top sheet, 26, 26a, 26b: solid gather, 32: water repellent sheet, 36: solid gather stretchable material, 40: elastic material around the leg, 42: elastic material around the waist, 44: elastic material around the abdomen, 46: upper fastening part, 48: wearer side part, 50: folding line, 52: waist flap.

Claims (5)

It consists of a front body, a back body, and a crotch, and is equipped with an absorber at least at the crotch, and the front and back bodies are joined to each other at both sides, forming a waist opening and a leg opening. A pants-type disposable diaper,
In the vicinity of the opening around the waist, a pants-type disposable diaper having a double structure of a wearer's side where the waist elastic material is not disposed and an upper tightening portion where the waist elastic material is disposed .   The underpants-type disposable diaper according to claim 1, wherein the absorbent body reaches the vicinity of the waist opening.   A waist flap extends from the waist opening, and a waist elastic material is disposed on the waist flap at a constant width from the tip. The waist flap is bent outward to be tightened upward. The pants-type disposable diaper according to claim 1 or 2, which acts as an attachment.   A waist flap extends from the waist opening, the waist flap is not provided with an elastic material around the waist, and acts as a wearer side portion when the waist flap is bent inward. The underpants-type disposable diaper according to claim 1.   The upper tightening portion provided with the elastic material around the waist is composed of a front body, a back body, and a crotch part, and includes an absorbent body at least at the crotch part. The front body and the back body are joined to each other at both sides. The pants-type disposable diaper according to claim 1 or 2, wherein the pants-type disposable diaper main body in which the waist opening and the leg opening are formed separately.

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