JP5782960B2 - Disposable diapers - Google Patents

Description

  The present invention relates to a disposable diaper. More specifically, the disposable diaper includes a front body, a back body, and a crotch, and is attached to the wearer's crotch and has a function of absorbing and holding liquid such as urine.

  Conventionally, disposable diapers for infants and the elderly are known, for example. There are various types of disposable diapers, for example, pants-type disposable diapers and tape-type disposable diapers are known (for example, Patent Document 1, Patent Document 2, and Patent Document 3). The pants-type disposable diaper is a type of disposable diaper in which both front and rear body side parts are joined in advance. As this pants-type disposable diaper, as shown in Patent Document 1, an outer cover sheet is integrated from the front body to the back body, and as shown in Patent Document 2, the outer cover sheet is integrated. There is known a cross-linked type in which a cover sheet is separated in a front body and a back body, and an absorbent main body is cross-linked between a front body exterior body and a back body exterior body. In addition, as shown in Patent Document 3, a tape-type disposable diaper is a type in which an adhesive tape is attached to both sides of the front body or the back body, and the front body and the back body are bonded using the adhesive tape when worn. It is a disposable diaper.

  In the disposable diaper of the type described above, a plurality of elastic materials are generally fixed in an extended state on the periphery of a waist opening formed by bonding the front body and the back body. In this way, by arranging a plurality of elastic materials around the periphery of the waist opening, the fit of the diaper is improved, so that the diaper can be prevented from falling down, and further, the excrement leaks from the waist opening. Can be prevented.

  That is, by fixing a plurality of stretchable materials in the stretched state along the front and back ends of the disposable diaper, when the stretchable materials contract, wrinkles are formed near the waist opening. Arise. By this wrinkle, a waist gather is formed near the waist opening. Since this waist gather can contact the wearer's skin and improve the adhesion of the disposable diaper, the fit of the diaper is improved and the excrement can be prevented from leaking.

JP 2009-254662 A JP 2010-233733 A Japanese Patent Laid-Open No. 2005-323585

  However, the waist gathers formed at the periphery of the waist opening are always in close contact with the wearer's skin. For this reason, by forming waist gathers, it is possible to improve the adhesion in the vicinity of the waist opening, but when the waist gathers are insufficient in flexibility and cushioning properties, On the other hand, there was a problem of giving a sense of incongruity. For example, if the elastic material forming the waist gathers is too tight, the elastic material may remain on the wearer's skin. Moreover, since the part which fixes an elastic material tends to become hard by application | coating of an adhesive agent, the heat sealing | fusion of an elastic material, etc., there exists a possibility that the softness | flexibility and touch of a diaper may be impaired. Furthermore, if the waist edge is hardened by heat-sealing the elastic material, there is a problem that not only the wearer's own skin but also the skin of the finger of the person who replaces the diaper is damaged.

  In addition, among a plurality of arrangements arranged at the periphery of the waist opening, some of the elastic members arranged on the lower side (crotch part side) of the waist gather have a particularly high degree of adhesion with the wearer's skin. For this reason, when wearing a disposable diaper for a long time, the wearer first starts to feel uncomfortable with the skin in contact with the waist gather. Therefore, flexibility and cushioning are particularly required on the lower side of the waist gather.

  Thus, at present, there is a demand for a disposable diaper having excellent flexibility and cushioning properties on the lower side (crotch side) of the waist gathers while having flexibility and cushioning properties on the entire waist gathers.

Therefore, the inventors of the present invention, as a result of earnestly examining the means for solving the problems of the above-described conventional invention, formed a waist gather by arranging a plurality of waist stretchable materials between the folded outer sheets, While intermittently joining the cushion forming sheet between the plurality of waist elastic members and the folded portion, among the plurality of waist elastic members, between the lower elastic member group disposed below the cushion forming sheet and the cushion forming sheet, It was found that by arranging one or more sheets, the flexibility and cushioning of the lower part of the waist gather can be improved, while improving the flexibility and cushioning of the entire waist gather. The inventor has conceived that the problems of the prior art can be solved based on the above knowledge, and has completed the present invention.
Specifically, the present invention has the following configuration.

The present invention relates to a disposable diaper composed of a front body 1, a back body 2, and a crotch 3 positioned between the front body 1 and the back body 2.
An outer sheet 10 is located on the front body 1 and / or the back body 2. And the folding | returning part 11 is formed because the outer sheet | seat 10 is folded by the skin contact surface side of a disposable diaper.
In addition, a plurality of waist stretchable materials 20 are disposed between the outer sheet 10 and the folded portion 11 in a direction along the folded line 12 of the outer sheet 10.
A cushion forming sheet 30 is disposed between the plurality of waist elastic members 20 and the folded portion 11.
The cushion forming sheet 30 is intermittently joined to the inward surface of the folded portion 11 so that the joined portion and the non-joined portion are continuous in the direction along the folded line 12 of the outer sheet 10.
Here, among the plurality of waist elastic materials 20, one or more waist elastic materials located on the folding line 12 side of the outer sheet 10 are referred to as an upper elastic material group 20a, and other waist elastic materials located on the crotch 3 side. Is referred to as a lower stretchable material group 20b.
In this case, the upper elastic material group 20 a is fixed in an extended state between the outer sheet 10 and the cushion forming sheet 30.
On the other hand, at least one sheet material is further interposed between the lower elastic material group 20 b and the cushion forming sheet 30.
And the lower elastic material group 20b is fixed in an expanded state between the outer sheet 10 and the sheet material.

Thus, according to the present invention, first, the cushion-forming sheet is disposed between the entire plurality of waist elastic members forming the waist gathers and the folded portion located on the skin contact surface side of the wearer. The cushion forming sheet is joined intermittently so that the folded portion, the joined portion and the non-joined portion are continuous. For this reason, when several waist gathers shrink | contract, space is formed in the non-joining part of a cushion formation sheet and a folding | turning part. This space increases the cushioning and flexibility of the entire waist gather.
Furthermore, in this invention, one or more sheet | seat materials are further interposed between the 1 or more lower elastic material group which belongs to the lower part of a some waist elastic material, and a cushion formation sheet. For this reason, the lower side of the waist gather has a structure in which the space formed between the cushion forming sheet and the folded portion is smaller than that of the upper side, and the unevenness is suppressed. Therefore, the lower side of the waist gathers has cushioning properties, but is less irritating to the wearer's skin and can exhibit high flexibility.
As described above, according to the present invention, the flexibility and cushioning properties of the waist gathers (particularly the lower side) can be sufficiently secured, and the wearing feeling of the disposable diaper is improved.

It is preferable that the preferable form of this invention is further equipped with the absorber 40, the top sheet 50, and the back seat | sheet 60. FIG. The absorber 40 is arranged over the front body 1 and the back body 2 with the crotch 3 as the center. The top sheet 50 is a liquid-permeable member that covers the absorber 40 from the skin contact surface side. The back sheet 60 is a liquid-impermeable member that covers the absorber 40 from the skin non-contact surface side. The top sheet 50 and the back sheet 60 are joined together so as to surround the absorber 40, thereby enclosing the absorber 40.
In the present invention, it is preferable that at least a part of the top sheet 50 and a part of the back sheet 60 are interposed between the lower elastic member group 20 b and the cushion forming sheet 30.

  In this way, by interposing the top sheet and the back sheet between the lower elastic material group and the cushion forming sheet, the unevenness on the lower side of the waist gather can be suppressed, and the irritation to the wearer's skin can be reduced. . Furthermore, since the joint end of the top sheet and the back sheet can be sandwiched between the lower elastic material group and the cushion forming sheet, it is possible to effectively prevent the absorber sealed in the top sheet and the back sheet from leaking outside. Can be prevented.

  In the present invention, an intermediate sheet 70 formed of a nonwoven fabric may be interposed between the lower stretchable material group 20b and the cushion forming sheet 30.

  In this way, by interposing an intermediate sheet formed of a nonwoven fabric having high flexibility and air permeability between the lower elastic material group and the cushion forming sheet, the cushioning and flexibility of the lower side of the waist gather are improved. Can do. In addition, the present invention can be realized relatively easily by interposing an intermediate sheet separately formed from the other sheets between the lower elastic member group and the cushion forming sheet.

  As described above, according to the present invention, it is possible to provide a disposable diaper having excellent flexibility and cushioning properties at the lower part (in the crotch part) of the waist gathers while having flexibility and cushioning properties as a whole at the waist gathers. it can.

FIG. 1 is a perspective view showing an example of the disposable diaper of the present invention viewed from the front body side. FIG. 2 is a development view showing an example of the disposable diaper of the present invention, and shows a state in which the disposable diaper is viewed from the skin contact surface side. FIG. 3 is a cross-sectional view showing a state where the disposable diaper is cut in the longitudinal direction along the line AA in FIG. 2. FIG. 4 is an enlarged view of a cross section of the disposable diaper shown in FIG. 3. FIG. 5 is an enlarged view of a cross section of a disposable diaper according to another embodiment. FIG. 6 is an enlarged view of a cross section of a disposable diaper according to still another embodiment. FIG. 7 is a perspective view schematically showing an end portion of the back body of the disposable diaper. FIG. 8 is a perspective view schematically showing an end portion of the back body of the disposable diaper in a state where the waist elastic material is expanded and contracted. FIG. 9 is a cross-sectional view showing an example of the structure of a waist gather. Fig.9 (a) is sectional drawing which shows the state which cut | disconnected the disposable diaper in the width direction in the CC of FIG. FIG.9 (b) is sectional drawing which shows the state which cut | disconnected the disposable diaper in the width direction in the line segment of DD of FIG. FIG.9 (c) is sectional drawing which shows the example of the structure of the waist gathers of other embodiment. FIG. 10 is a schematic view for explaining the mode of the joint portion.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. The present invention is not limited to the embodiments described below, but includes those appropriately modified by those skilled in the art from the following embodiments.
In the present specification, the “longitudinal direction” basically means a direction connecting the front body and the back body (vertical direction in FIG. 2). The “width direction” basically means a direction orthogonal to the longitudinal direction (left-right direction in FIG. 2).
In the present specification, “A to B” means “A or more and B or less”.

(1. Overall configuration of disposable diapers)
The present invention is widely applicable to, for example, known pants-type disposable diapers, tape-type disposable diapers, and bridge-type disposable diapers. A pants-type disposable diaper is a disposable diaper of a type in which both sides of a front body and a back body are joined in advance (for example, Patent Document 1). A tape-type disposable diaper is a type of disposable diaper in which an adhesive tape is attached to both sides of the front body or the back body, and the front body and the back body are bonded using the adhesive tape when worn (for example, patents) Reference 2). Moreover, a bridge | crosslinking type disposable diaper is a type of disposable diaper which has the structure by which the absorptive main body was bridge | crosslinked between the front body exterior body and the back body exterior body (for example, patent document 3).
Below, among these various types of disposable diapers, the content of the present invention will be described in detail by taking a cross-linked disposable diaper as an example.

  FIG. 1 is a perspective view showing an example of a cross-linked disposable diaper viewed from the front body side. FIG. 2 is a development view showing an example of a cross-linked disposable diaper, and shows a state in which the disposable diaper is viewed from the skin contact surface side. As shown in the developed view of FIG. 2, the disposable diaper 100 is applied to the front body 1 that contacts the wearer's abdomen, the back body 2 that contacts the back of the wearer, and the inseam of the wearer. The crotch part 3 is separated. In the present embodiment, the cross-linked disposable diaper includes a front body exterior body 1a on a front body 1 and a back body exterior body 2a on a back body 2. And the absorptive main body 3a is bridge | crosslinked by the crotch part 3 between the front body exterior body 1a and the back body exterior body 2a.

  2 is assembled into the state shown in FIG. 1 by joining both end portions in the width direction of the front body exterior body 1a and the back body exterior body 2a. As shown in FIG. 1, a waist opening 101 is formed by the upper end edge of the front body exterior body 1a and the upper end edge of the rear body exterior body 2a. Moreover, the both ends of the front body exterior body 1a and the back body exterior body 2a are joined together, thereby forming a leg periphery opening 102 positioned around the wearer's leg when worn. For this reason, the wearer can put on the disposable diaper 100 by putting both legs through the waist opening 101 and taking out each leg from the opening 102 around the legs.

  As shown in FIGS. 1 and 2, a plurality of waist stretchable members 20 are disposed on the front body exterior body 1a and the rear body exterior body 2a. The plurality of waist elastic members 20 extend in the width direction of the disposable diaper along the end of the front body exterior body 1a and the end of the back body exterior body 2a corresponding to the opening edge of the waist opening 101. The plurality of waist stretchable materials 20 are fixed in an extended state, and a waist gather 21 is formed in the vicinity of the waist opening 101 by contracting the plurality of waist stretchable materials 20.

(2. Components of disposable diapers)
Next, each part structure of the disposable diaper 100 is demonstrated using drawing.

(2-1. West Gather)
The waist gathers 21 are gathers formed in the vicinity of the waist opening 101 of the disposable diaper by the contraction action of the plurality of waist stretchable materials 20. In the present embodiment, the waist gathers 21 are formed on each of the front body exterior body 1a and the back body exterior body 2a.

  FIG. 3 is a cross-sectional view showing a state in which the disposable diaper in the unfolded state shown in FIG. 2 is cut in the longitudinal direction of the disposable diaper along the line AA in FIG. In FIG. 3, the vertical direction is the longitudinal direction of the disposable diaper. In FIG. 3, the right side is the skin contact surface side, and the left side is the non-contact surface side. Moreover, FIG. 4 is the enlarged view which expanded the back body of the disposable diaper among sectional drawings of FIG. Originally, various sheet materials are extremely thin, but in FIG. 3 and FIG. 4, drawing is performed with a conceptual thickness to make the explanation easy to understand.

  As shown in FIGS. 3 and 4, the front body exterior body 1 a and the back body exterior body 2 a include an outer sheet 10 in the outermost layer. Further, in the front body exterior body 1a and the back body exterior body 2a, the outer sheet 10 is folded back to the skin contact surface side, and a folded portion 11 is formed. The folding line 12 on which the outer sheet 10 is folded corresponds to the ends of the front body exterior body 1a and the back body exterior body 2a. When the disposable diaper is assembled, it becomes the opening edge of the waist opening 101.

(2-1-1. Waist stretchable material)
As shown in FIG. 3 and FIG. 4, in the front body exterior body 1 a and the back body exterior body 2 a, a plurality of waist elastic members 20 are arranged along the folding line 12 between the outer sheet 10 and the folding part 11. It is arranged in the extended state. The number of the waist elastic materials 20 should just be 2 or more, for example, it is good also as 2-15, 4-12, or 6-9. As shown in FIGS. 3 and 4, the plurality of waist elastic members 20 are arranged at predetermined intervals in the longitudinal direction of the disposable diaper. The plurality of waist elastic members 20 are juxtaposed substantially in parallel as shown in the development view of FIG. As shown in FIG. 2, the plurality of waist elastic members 20 are preferably arranged so as to extend almost in the entire width direction of the front body exterior body 1a and the back body exterior body 2a in the extended state. The plurality of waist elastic members 20 are arranged in an extended state in the region of about 80% to 99%, or 85% to 95% with respect to the length in the width direction of the front body exterior body 1a and the back body exterior body 2a. It is preferable.

  As shown in FIGS. 3 and 4, the skin non-contact surface side of the plurality of waist elastic members 20 is fixed to the outer sheet 10. The plurality of waist stretchable materials 20 are fixed to the outer sheet 10 in a stretched state that allows a sufficient stretch force to be applied without applying an excessive tightening force to the wearer. The stretch rate when the plurality of waist stretchable materials 20 are fixed is preferably, for example, 200 to 400%, and particularly preferably 250 to 350%. The “stretch rate” indicates a percentage of the length of the stretched material in the stretched state with respect to the length (original size) of the stretched material in the non-stretched state. Moreover, as a method of fixing the plurality of waist stretchable materials 20 to the sheet material, a known method can be appropriately employed. The plurality of waist elastic materials 20 are, for example. An adhesive having high fluidity such as a hot melt adhesive may be applied or sprayed, or may be fixed by welding such as heat or ultrasonic waves such as an adhesive heat seal.

  In the present specification, the “outer sheet” means a sheet material on which the skin non-contact surface side of the plurality of waist stretchable materials 20 is fixed. For this reason, the outer sheet | seat 10 is not necessarily restricted to what was located in the outermost layer of a disposable diaper. For example, another sheet material may be bonded to the outer sheet 10 so as to cover the outer sheet 10.

The plurality of waist stretchable materials 20 can be classified into those belonging to the upper stretchable material group 20a and those belonging to the lower stretchable material group 20b from the arrangement relationship. That is, the “upper stretchable material group 20 a” means one or more waist stretchable materials disposed at a position near the folded portion 11 of the outer sheet 10 among the plurality of waist stretchable materials 20. Further, the “lower stretchable material group 20b” means other waist stretchable materials disposed at a position near the crotch 3 among the plurality of waist stretchable materials 20. There may be one or more waist elastic members 20 belonging to the upper elastic material group 20a and the lower elastic material group 20b.
For example, the number of the upper stretchable material group 20a may be, for example, 1 to 10, 2 to 9, 3 to 8, 4 to 7, or 5 to 6. Also, the number of the lower elastic member group 20b may be, for example, 1 to 10, 2 to 9, 3 to 8, 4 to 7, or 5 to 6.
In the example shown in FIGS. 3 and 4, four of the seven waist elastic members 20 fixed to the outer sheet 10 of the back body exterior body 2 a are arranged at positions near the folded portion 11 of the outer sheet 10. The waist elastic material 20 belongs to the upper elastic material group 20a. On the other hand, among the seven waist elastic members 20, the remaining three waist elastic members 20 arranged near the crotch 3 belong to the lower elastic member group 20b.
Further, in the example shown in FIG. 3, four of the seven waist elastic members 20 fixed to the outer sheet 10 of the front body exterior body 1 a are disposed at positions near the folded portion 11 of the outer sheet 10. The waist elastic material 20 belongs to the upper elastic material group 20a. On the other hand, among the seven waist elastic members 20, the remaining three waist elastic members 20 arranged near the crotch 3 belong to the lower elastic member group 20b.

(2-1-2. Cushion forming sheet)
Here, as shown in FIG. 4, a cushion forming sheet 30 is disposed between the folded portion 11 formed by folding the outer sheet 10 and the plurality of waist elastic members 20.
The cushion forming sheet 30 is a sheet material disposed for the purpose of enhancing the cushioning properties and flexibility of the waist gather 21.
The cushion forming sheet 30 is preferably formed of, for example, a nonwoven fabric. The nonwoven fabric of the cushion forming sheet 30 may be a hydrophilic nonwoven fabric or a water-repellent nonwoven fabric. Moreover, in this embodiment, although the cushion formation sheet 30 is formed as an independent sheet | seat material, utilizing some sheet members (for example, a top sheet, a cover sheet, etc.) which comprise a disposable diaper. It is good.

  The cushion contact sheet 30 has its skin contact surface side intermittently joined to the inward surface (skin non-contact surface side) of the folded portion 11 in the direction along the return line 12. “Intermittently joining” means that the joined part and the non-joined part are continuous at regular intervals. Although the joining aspect of the cushion forming sheet 30 and the folded portion 11 will be described later, the cushion forming sheet 30 and the folded portion 11 are intermittently joined in the direction along the folding line 12 so that the cushion forming sheet 30 and the folded portion 11 are joined. A space is formed between the two, and the cushioning property and flexibility of the waist gather 21 are enhanced by this space.

  As shown in FIG. 4, among the plurality of waist stretchable materials 20, the waist stretchable material 20 belonging to the upper stretchable material group 20 a has its skin contact surface side fixed to the skin non-contact surface side of the cushion forming sheet 30. Has been. As shown in the development view of FIG. 2, it is preferable that both the cushion forming sheet 30 and the upper stretchable material group 20a have a length over almost the entire width direction of the rear body exterior body 2a and the front body exterior body 1a. . That is, it is preferable that the upper elastic member group 20a is fixed to the cushion forming sheet 30 over substantially the entire extending direction. As described above, the upper elastic material group 20 a has its skin contact surface side fixed to the cushion forming sheet 30 and the opposite skin non-contact surface side fixed to the outer sheet 10. Accordingly, the upper stretchable material group 20 a is in a state of being sandwiched between the outer sheet 10 and the cushion forming sheet 30.

  Further, as shown in FIG. 4, the cushion forming sheet 30 extends toward the crotch 3 beyond the lower end portion of the folded-back portion 11, for example, a top sheet constituting the absorbent main body 3 a. It is preferable that a part of 50 is covered from the skin contact surface side. As a result, in the cross-linked disposable diaper, the bonding force between the front body exterior body 1a and the back body exterior body 2a and the absorbent main body 3a cross-linked therebetween is improved, and the appearance of the disposable diaper is not easily broken. .

(2-1-3. Intervening sheet)
On the other hand, as shown in FIG. 4, among the plurality of waist stretchable materials 20, the waist stretchable material 20 belonging to the lower stretchable material group 20 b is not directly fixed to the cushion forming sheet 30. That is, as shown in FIG. 4, at least one sheet material is interposed between the lower stretchable material group 20 b and the cushion forming sheet 30. The purpose of arranging at least one sheet material between the lower stretchable material group 20b and the cushion forming sheet 30 is to provide a space between the sheet materials generated by intermittently joining the cushion forming sheet 30 to the folded portion 11. By reducing the size only on the lower side of the waist gather 21, it is to reduce irritation to the skin of the wearer. This point will be described later.
In the present specification, at least one sheet material interposed between the lower stretchable material group 20b and the cushion forming sheet 30 is also simply referred to as an “intervening sheet”.

  The sheet material employed as the intervening sheet is not particularly limited. That is, as the intervening sheet, a part of another sheet material constituting the disposable diaper may be used, or a separate independent sheet material may be used.

  Further, the cushion forming sheet 30 and the intervening sheet may be joined as a whole or may not be joined. Further, the cushion forming sheet 30 and the interposition sheet may be joined intermittently. If the cushion forming sheet 30 and the intervening sheet are joined, the appearance of the waist gather 21 when the waist elastic material 20 contracts can be made beautiful. On the other hand, if the cushion forming sheet 30 and the interposition sheet are not joined, even if the waist elastic material 20 contracts, the contraction action of the waist elastic material 20 is not transmitted to the interposition sheet. Can be suppressed more effectively, and irritation to the skin of the wearer can be reduced.

  In the example shown in FIG. 4, a part of the inner sheet 13 constituting the exterior member and a part of various sheet materials constituting the absorbent main body 3a are used as the intervening sheet. The inner sheet 13 is a sheet material for sandwiching various elastic materials with the outer sheet 10. The absorbent main body 3a basically includes an absorbent body 40 that absorbs and holds liquid such as urine, a top sheet 50 that covers the absorbent body 40 from the skin contact surface side, and the absorbent body 40 that is not exposed to skin. A back sheet 60 covering from the contact surface side is included. In the example shown in FIG. 4, the absorbent main body 3a further includes a cover sheet 61 that covers the back sheet 60 from the skin non-contact surface side. And between the lower elastic material group 20b and the cushion forming sheet 30, the inner sheet 13, the cover sheet 61, the back sheet 60, and the top sheet 50 are interposed in this order from the skin non-contact surface side. These intervening sheets are preferably bonded between the lower stretchable material group 20b and the cushion forming sheet 30 by, for example, a bonding means using a hot melt adhesive or an adhesive heat seal.

  As shown in FIG. 4, by interposing four sheet materials between the lower elastic material group 20 b and the cushion forming sheet 30, the influence of the shrinking lower elastic material group 20 b is directly transmitted to the wearer's skin. Since it becomes difficult, the irritation | stimulation which the lower part side of the waist gathers 21 gives to a wearer's skin becomes very small. In the present invention, the cushion forming sheet 30 is intermittently joined to the folded portion 11 to form a space between the two sheets, but a plurality of sheets are provided between the lower stretchable material group 20 b and the cushion forming sheet 30. By interposing the material, the unevenness of the waist gather 21 caused by this space can be suppressed. Therefore, a moderately sized space is generated on the lower side of the waist gather 21, and the impact on the wearer's skin is extremely small while maintaining cushioning and flexibility. For this reason, the wearing feeling of a disposable diaper improves. Further, in the cross-linked disposable diaper, the sheet material constituting the absorbent main body 3a is interposed between the sheet materials constituting the outer package (1a, 2a), so that the outer package (1a, 2a) and the absorbent material are absorbed. The bonding strength of the main body 3a is improved. Therefore, the appearance of the cross-linked disposable diaper is not easily broken.

Further, as shown in the developed view of FIG. 2, the absorbent main body 3a is disposed in the central portion of the exterior material (1a, 2a). For this reason, when using a part of sheet material which comprises the absorptive main body 3a as an interposition sheet, this interposition sheet will be arrange | positioned in the center part of the waist gathers 21. FIG. Here, when the waist elastic member 20 contracts, the waist gather 21 is most likely to have a wrinkle at the center thereof and is likely to be uneven. The edge gives a strong stimulus to the wearer's skin. In this regard, as shown in FIG. 4, by using a part of the sheet material that constitutes the absorbent main body 3a as an intervening sheet, the central portion on the lower side of the waist gather 21 that is particularly irritating to the wearer's skin. Therefore, the wearing feeling of the disposable diaper can be efficiently improved while suppressing the manufacturing cost of the disposable diaper.
However, the intermediate sheet 70 is further disposed as an interposed sheet on both sides in the width direction of the absorbent main body 3a, and one or more sheet materials are interposed between the cushion forming sheets 30 in the entire lower elastic member group 20b. It is good as well.

  FIG. 5 shows another embodiment of the present invention. FIG. 5 is an enlarged view in which the longitudinal section of the disposable diaper is enlarged with respect to the back body as in FIG. 4. In the example shown in FIG. 5, the inner sheet 13 and the intermediate sheet 70 are interposed between the lower elastic material group 20 b and the cushion forming sheet 30. As described above, the inner sheet 13 is a sheet material for sandwiching various elastic materials with the outer sheet 10. On the other hand, the intermediate sheet 70 is a sheet material formed separately from other sheet materials. Thus, for the purpose of sandwiching between the lower elastic member group 20b and the cushion forming sheet 30, a separate and independent sheet material such as the intermediate sheet 70 may be provided. Various materials can be adopted as the material constituting the intermediate sheet 70. For example, as the intermediate sheet 70, a sheet material formed of a woven fabric, a nonwoven fabric, or a porous film may be used. Moreover, in order to give the air permeability and liquid absorbability of the intermediate sheet 70, 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.

  The intermediate sheet 70 is preferably disposed at least in the central portion of the waist gather 21. The length in the width direction of the intermediate sheet 70 is preferably 20% to 110%, or 30 to 90% with respect to the length in the width direction of the lower stretchable material group 20b. The length of the intermediate sheet 70 may be saved to about 20% to 30%, and the intermediate sheet 70 may be disposed only in the central portion of the waist gather 21. In other words, as described above, the center portion of the waist gather 21 is particularly susceptible to wrinkles. However, by placing the intermediate sheet 70 only in the center portion, it is possible to efficiently improve the wearing feeling of the disposable diaper. it can. Moreover, the unevenness | corrugation of the whole lower part side of the waist gather 21 can be suppressed by lengthening the length of the intermediate sheet 70 to about 90%-110%.

  FIG. 6 shows still another embodiment of the present invention. FIG. 6 is an enlarged view in which the longitudinal section of the disposable diaper is enlarged with respect to the back body, as in FIG. 4. In the example shown in FIG. 6, only the intermediate sheet 70 is interposed between the lower elastic material group 20 b and the cushion forming sheet 30. As shown in FIG. 6, the lower side of the waist gather 21 gives the wearer's skin even with a relatively simple structure in which the intermediate sheet 70 is interposed between the lower elastic member group 20 b and the cushion forming sheet 30. Stimulation can be reduced. The intermediate sheet 70 interposed between the lower stretchable material group 20b and the cushion forming sheet 30 is not limited to a single layer, and a plurality of intermediate sheets 70 may be used.

  As shown in FIG. 4 to FIG. 6, the type of sheet material used as the intervening sheet, the number of intervening sheets, and the position where the intervening sheet is disposed can be appropriately adjusted according to the type and application of the disposable diaper. It is.

(2-1-4. Cushion structure)
Next, with reference to FIGS. 7 to 9, the cushion structure of the waist gather when the waist elastic material contracts will be described. Hereinafter, in order to simplify the description, an embodiment (see FIG. 6) in which one intermediate sheet 70 is interposed between the lower elastic member group 20b and the cushion forming sheet 30 will be described as an example. However, even when various other sheet materials are interposed between the lower elastic material group 20b and the cushion forming sheet 30, the structure of the waist gathers when the waist elastic material is contracted is the same.

  FIG. 7 is a perspective view schematically illustrating the structure at the end of the back body exterior body 2a. Moreover, in the state shown in FIG. 7, the waist elastic material 20 is not contracted, and the waist gathers 21 (皺) are not substantially formed. As shown in FIG. 7, the outer sheet 10 is folded back to the skin contact surface side by a folding line 12 to form a folded portion 11. A plurality of waist elastic members 20 are fixed to the outer sheet 10 in an extended state. The plurality of waist elastic members 20 are divided into an upper elastic member group 20a near the folding line 12 (upward in FIG. 7) and a lower elastic member group 20b near the crotch part (downward in FIG. 7). Here, a cushion forming sheet 30 is disposed between the plurality of waist elastic members 20 and the folded portion 11. Further, an intermediate sheet 70 a is further interposed between the lower elastic material group 20 b and the cushion forming sheet 30.

  In FIG. 7, the joint portion 31 between the cushion forming sheet 30 and the folded portion 11 is conceptually drawn. As shown in FIG. 7, the cushion forming sheet 30 and the folded portion 11 are joined together by a joining portion 31 in a stretched state. As shown in FIG. 7, the joint portion 31 is intermittently formed in a direction (width direction) along the return line 12. That is, between the cushion forming sheet 30 and the folded portion 11, the joined portion 31 and the non-joined portion 32 are formed intermittently in the direction along the folded line 12 (width direction). Moreover, in the example shown by FIG. 7, the junction part 31 is intermittently formed also in the longitudinal direction of the disposable diaper. In this way, linear joints formed long in the longitudinal direction may be intermittently formed in the width direction and the longitudinal direction.

The interval between the joint portions 31 in the direction along the folding line 12 (width direction) is preferably, for example, 2 to 50 mm, and particularly preferably 5 to 10 mm. In addition, the space | interval of joining part 31 becomes the non-joining part 32. FIG. The space between the joint portions 31 becomes a space 33 when the waist elastic member 20 contracts, and a cushion structure is formed in the waist gather 21 by the space 33.
Moreover, it is preferable that the space | interval of the junction parts 31 in a longitudinal direction shall be 0.5-5 mm, for example, and it is preferable that it is especially 1-3 mm.

  FIG. 8 conceptually shows a state in which the end side of the rear body exterior body 2a is cut along the line BB shown in FIG. 7, and in FIG. 8, the skin contact surface of the folded portion 11 is shown. The state seen from the side is shown. Further, the state shown in FIG. 8 is a state in which the waist gathers 21 are formed in the vicinity of the end portion of the back body exterior body 2a by contracting the plurality of waist elastic members 20. When the plurality of waist stretchable materials 20 contract from the state shown in FIG. 7, as shown in FIG. 8, the outer sheet 10 fixed to the skin non-contact surface side of the plurality of waist stretchable materials 20, and the plurality The cushion forming sheet 30 fixed to the skin contact surface side of the waist elastic member 20 is bent. Further, when the cushion forming sheet 30 is bent, the folded portion 11 intermittently joined to the cushion forming sheet 30 is also bent. Then, a three-dimensional space 33 is generated in the non-joining portion 32 between the cushion forming sheet 30 and the folded portion 11. In this way, when the space 33 is generated between the cushion forming sheet 30 and the folded portion 11, the space 33 functions as a cushion for the waist gather 21.

  That is, the space 33 between the cushion forming sheet 30 and the folded portion 11 exhibits a buffering function like an air cushion. By forming such a space 33, it becomes difficult for the joint portion 31 and the waist elastic material 20 to directly touch the wearer's skin (or fingers of the person performing the exchange work). Hard feel is difficult to be transmitted to the wearer's skin. Therefore, by forming the space 33 between the cushion forming sheet 30 and the folded portion 11, the touch around the waist of the disposable diaper can be felt softly. The space 33 also has an effect of improving the air permeability by communicating the inside and the outside of the disposable diaper.

  On the other hand, as shown in FIG. 8, on the lower side of the waist gather 21, the unevenness of the folded portion 11 caused by the space 33 between the cushion forming sheet 30 and the folded portion 11 is suppressed. This is a phenomenon caused by interposing an intermediate sheet 70 between the waist elastic material 20 belonging to the lower elastic material group 20 b and the cushion forming sheet 30 among the plurality of waist elastic materials 20. This point will be described below with reference to FIG.

  FIG. 9 is a cross-sectional view of the waist gather 21. FIG. 9A shows a state in which the waist gather 21 is cut along the line C-C in FIG. FIG. 9B shows a state in which the waist gather 21 is cut along the line DD in FIG. 9A is a cross-sectional view of a portion where the intermediate sheet 70 is not interposed between the waist elastic material 20 and the cushion forming sheet 30, and FIG. 9B is a cross-sectional view of the waist elastic material 20 and the cushion forming sheet 30. It is sectional drawing of the location where the intermediate sheet 70 interposes between them. In addition, in FIG.9 (b), the example which joined the cushion formation sheet 30 and the intermediate sheet | seat 70 entirely is shown.

  When the size of the space 33 shown in FIG. 9A is compared with the size of the space 33 shown in FIG. 9B, the space 33 shown in FIG. 9B is relatively smaller. Thus, it can be seen that the unevenness of the folded portion 11 is suppressed on the lower side of the waist gather 21. This is because the intermediate sheet 70 is interposed between the waist elastic material 20 and the cushion forming sheet 30, so that the contraction action of the waist elastic material 20 is folded by the influence of the thickness of the intermediate sheet 70 and the bending of the intermediate sheet 70. This is because it is difficult to reach part 11. If the contracting action of the waist elastic member 20 is difficult to be transmitted to the folded portion 11, the bending of the folded portion 11 is relatively suppressed as shown in FIG. 9B. For this reason, as shown in FIG. 9 (b), a space formed between the cushion forming sheet 30 and the folded portion 11 at a location where the intermediate sheet 70 is interposed between the waist elastic material 20 and the cushion forming sheet 30. 33 is relatively small.

FIG. 9B shows an embodiment different from the above-described FIG. 9B. In the example shown in FIG. 9B, the intermediate sheet 70 and the cushion forming sheet 30 are joined together. On the other hand, in the example shown in FIG. 9C, the intermediate sheet 70 and the cushion forming sheet 30 are not joined. Thus, since the intermediate sheet 70 and the cushion forming sheet 30 are separated, as shown in FIG. 9C, even when the waist elastic material 20 contracts, the contraction action is Little is transmitted to the cushion forming sheet 30. Therefore, the cushion forming sheet 30 and the folded portion 11 intermittently joined to the cushion forming sheet 30 do not bend very much. For this reason, the space 33 shown in FIG. 9C is relatively smaller than the space 33 shown in FIG.
In this way, the intermediate sheet 70 may not be bonded to the cushion forming sheet 30.

(2-1-5. Joint part)
FIG. 10 is a diagram schematically showing an example of the form of the joint portion 31 between the cushion forming sheet 30 and the folded portion 11. The form of the joint part 31 is not limited to the form shown in FIG. 7 and FIG. 8, and various forms can be adopted. A part of the example of the joint portion 31 will be described with reference to FIG.

  In the form shown in FIG. 10 (a), a fixed number (7 in FIG. 10 (a)) of dot-like joint portions 31A are arranged in a line in the longitudinal direction of the disposable diaper to form a joint portion group 31B. Yes. The plurality of joint groups 31B are intermittently formed at regular intervals in the width direction and the longitudinal direction. In the example shown in FIG. 10 (a), since the joint portion group 31B that is a set of dot-like joint portions 31A is oriented in the longitudinal direction, the diaper can easily follow the curvilinear shape around the wearer's waist, Excellent fit and feel. Furthermore, since the joint portion group 31B is formed as an aggregate of circular dot joint portions 31A, the tactile sensation becomes soft, and even if the joint portion 31A hits the skin, the wearer is less likely to feel pain. Yes.

  Further, as shown in FIG. 10B, a certain number (8 in FIG. 10B) of dot-like joints 31A are arranged in two rows in the width direction to form a joint group 31B extending in the longitudinal direction. It is good to do. As described above, by arranging the dot-like joint portions 31A in two rows in the width direction, it is possible to improve the joint strength of the joint portion while preventing the air permeability at the joint portion from being lowered. For this reason, even when the exterior body is stretched strongly in the width direction, the cushion forming sheet 30 is not easily separated from the folded portion 11.

  FIG. 10C shows an example in which the dot-shaped joint portions 31A are arranged in a so-called zigzag regular pattern. Even in such a staggered pattern, a space is formed between the folded portion 11 of the cushion forming sheet 30 due to the contraction action of the waist stretchable material 20. By arranging the dot-like joint portions 31A in a staggered manner, the feel of the waist gather 21 is softened and the air permeability is improved.

  FIG. 10D shows an example in which the linear joint portions 31C are arranged in a lattice pattern. As described above, by arranging the linear joint portions 31C in a lattice shape, a space is generated at a non-joint portion surrounded by the linear joint portions 31C, and the skin contact surface side of the folded portion 11 is substantially rectangular. Excitement. The raised convex part 11 of the folded part 11 has a good touch and a very high cushioning property.

  Further, as shown in FIG. 10 (e), the linear joint portion 31 </ b> C may be formed over substantially the entire length of the folded portion 11. Even in such a form, the flexibility and cushioning properties in the vicinity of the waist opening, which are the effects of the present invention, can be obtained.

(2-2. Front body exterior body and back body exterior body)
The front body exterior body 1a and the back body exterior body 2a are in contact with the wearer's abdomen and back part, and the absorbent is located between the front body exterior body 1a and the back body exterior body 2a when the disposable diaper 10 is worn. It is a member for holding the main body 3a.

  In the development view of the disposable diaper shown in FIG. 2, the front body exterior body 1 a has an absorptivity of a long side that is a side that becomes the waist circumference end and a side flap that is a joint portion of the back body exterior body 2 a. It has a substantially trapezoidal shape having a short side that is a side to be joined to the main body 3a. Similarly, the back body exterior body 2a is joined to the absorbent main body 3a with the long side that is the side that becomes the waist circumference end, the both sides of the side flap that is the joint between the front body exterior body 1a, and the absorbent body 3a. It has a substantially trapezoidal shape having a short side that is a side. However, as for the front body exterior body 1a, each of the oblique sides connecting the both sides of the side flap and the short side to be joined to the absorbent main body 3a has an arc shape. For this reason, even when the front body exterior body 1a and the back body exterior body 2a are joined, the front body exterior body 1a is relatively wide open at the leg opening, and the legs of the wearer are easy to move. It has become.

  The side flaps extending to both side edges of the front body exterior body 1a and the back body exterior body 2a are overlapped with each other and joined by known joining means such as hot embossing or sonic welding.

  The front body exterior body 1a and the back body exterior body 2a have an outer sheet 10 on the skin non-contact surface side and an inner sheet 13 on the skin contact surface side. The outer sheet 10 and the inner sheet 13 are formed of, for example, a flexible fiber nonwoven fabric or a plastic sheet. The non-woven fabric and the plastic sheet are bonded with, for example, a hot melt adhesive.

  In addition, a plurality of waist elastic members 20 are arranged in an extended state along the waist circumference ends of the front body exterior body 1a and the back body exterior body 2a. Further, a tammy stretchable material 22 is disposed on the lower side (the crotch side) of the plurality of waist stretchable materials 20. The tammy stretchable material 22 is fixed in an expanded state between the outer sheet 10 and the inner sheet 13, and the tammy stretchable material 22 contracts to form a tammy gather around the abdomen of the disposable diaper. As shown in FIG. 1, it is preferable that the tammy stretchable material 22 is not disposed at a location where the absorbent main body 3a is located.

(2-3. Absorbent body)
The absorbent main body 3a is held in a state of being bridged between the front body exterior body 1a and the back body exterior body 2a, and is positioned at the crotch portion of the wearer when the disposable diaper 100 is worn. Absorb and retain liquid such as urine. The absorbent main body 3a is disposed over the front body 1 and the back body 2 with the crotch part 3 of the disposable diaper as the center.

  FIG. 2 is a development view seen from the top sheet 50 side of the absorbent main body 3a. Moreover, FIG. 3 is sectional drawing which shows the state which cut | disconnected the disposable diaper 10 in the longitudinal direction in the line segment of AA shown by FIG. As shown in FIG. 2 and FIG. 3, the absorbent main body 3 a basically includes an absorbent body 40, a top sheet 50, a back sheet 60, a cover sheet 61, and a pair of three-dimensional gathers 42.

(2-3-1. Absorber)
The absorber 40 is a member for absorbing liquid such as urine and holding the absorbed liquid. The absorber 40 is disposed between the liquid-permeable top sheet 50 and the liquid-impermeable back sheet 60. The absorber 40 has a function of absorbing the liquid that has passed through the top sheet 50 and is made of an absorbent material.

  A well-known material can be employ | adopted for the absorptive material which comprises the absorber 40. FIG. As the absorbent material, for example, flap pulp, superabsorbent polymer, or hydrophilic sheet may be used. In addition, as the absorbent material, one kind of flap pulp, superabsorbent polymer, or hydrophilic sheet may be used alone, or two or more kinds may be used in combination. The absorbent material is usually formed and used in a single-layer or multi-layer mat shape.

  The absorbent material is preferably encapsulated by the core wrap sheet 41. The core wrap sheet 41 covers the absorbent material from the skin contact surface side and the skin non-contact surface side, and prevents the absorbent material from leaking outside. As the core wrap sheet 41, tissue paper, absorbent paper, a nonwoven fabric subjected to hydrophilic treatment, or the like can be used as appropriate.

  Moreover, it is preferable that the absorber 40 is sandwiched between at least a part between the top sheet 50 and the back sheet 60. That is, when the shape of the absorber 40 is a rectangular shape, both side edges that are long sides and upper and lower edges that are short sides are sealed between the top sheet 50 and the back sheet 60. It is preferable.

  The shape of the absorber 40 can be appropriately designed according to the shape, size, and application of the disposable diaper. For example, the shape of the absorber 40 may be an hourglass shape as shown in FIG. Moreover, it is good also as a rectangular type, an elliptical type, or a gourd type currently used for the general disposable diaper.

(2-3-2. Top sheet)
The top sheet 50 is a member that is in direct contact with the skin of the wearer's crotch and allows liquid such as urine to pass through the absorber 40. For this reason, the top sheet 50 is made of a liquid-permeable material having high flexibility. Moreover, the top sheet 50 is arrange | positioned so that the skin contact surface side of the absorber 40 may be coat | covered.

  The example of the impermeable material which comprises the top sheet 50 is a woven fabric, a nonwoven fabric, or a porous film. Further, for example, a fiber made of a thermoplastic resin such as polypropylene, polyethylene, polyester, or nylon, which has been subjected to a hydrophilization treatment and further made into a non-woven fabric may be used.

(2-3-3. Backsheet)
The back sheet 60 is a member for preventing the liquid that has passed through the top sheet 50 and absorbed by the absorber 40 from leaking to the outside of the diaper. For this reason, the backsheet 60 is made of a liquid-impermeable material. The back sheet 60 covers the absorber 40 from the non-skin contact surface side in order to prevent liquid leakage from the bottom surface of the absorber 40.

  An example of the impermeable material constituting the back sheet 60 is a liquid impermeable film made of polyethylene resin. In particular, it is preferable to use a microporous polyethylene film in which a plurality of fine pores of 0.1 to 4 μm are formed.

  Further, as shown in FIG. 3, the back sheet 60 and the top sheet 50 are joined to each other along the upper and lower edges of the absorber 40. The top sheet 50 and the back sheet 60 may be bonded by, for example, a bonding method using a hot-melt adhesive or other fluid adhesive, or may be bonded by heat welding such as heat sealing or ultrasonic welding. It may be.

(2-3-4. Cover sheet)
The cover sheet 61 is a member for reinforcing the back sheet 60 and improving its feel. The cover sheet 61 is bonded to the skin contact surface side of the back sheet 60. As the material constituting the cover sheet 61, a woven fabric or a non-woven fabric is used. In particular, it is preferable to use a nonwoven fabric or a wet nonwoven fabric made of a thermoplastic resin such as polyethylene, polypropylene, or polyester as a material constituting the cover sheet 61.

(2-3-5. Three-dimensional gather)
The pair of three-dimensional gathers 42 is a member that stands along both side edges of the absorber 40 and prevents side leakage of urine excreted by the wearer. Each of the three-dimensional gathers 42 is provided with a three-dimensional gather stretchable material at the tip thereof, and rises toward the wearer's skin contact direction when the stretchable material contracts. For this reason, the pair of three-dimensional gathers 42 serves as a leakage barrier for urine, and urine that has not permeated through the top sheet 50 or urine that has not been absorbed by the absorber 40 can be obtained from the openings around the legs of the disposable diaper. Prevent leaking side leaks.

  The three-dimensional gather 42 can employ a known configuration used in conventional disposable diapers. The three-dimensional gather 42 can be formed, for example, by sandwiching and fixing a stretched three-dimensional gather elastic material between the layers of the water-repellent sheet. As the water-repellent sheet, for example, a non-woven sheet obtained by a method such as card embossing or spunbonding can be used, and it is particularly preferable to use a non-woven sheet such as SMS or SMMS having high waterproofness.

(2-4. Various elastic materials)
The stretchable material is a member that is disposed at an appropriate position of the disposable diaper in order to form a gather or to erect a member on which the stretchable material is disposed by its contraction force. For example, as described above, a plurality of waist stretchable members 20 are disposed in the vicinity of the edges of the front body exterior body 1a and the back body exterior body 2a. Further, a tammy stretchable material 22 is disposed below the waist stretchable material 20 in the front body exterior body 1a and the back body exterior body 2a. Moreover, in order to form the three-dimensional gather 42 of the absorptive main body 3a, a three-dimensional gather stretchable material is arranged.

  A thread-like elastic rubber is usually used as the elastic material. As such a rubber material, materials such as styrene rubber, olefin rubber, urethane rubber, ester rubber, polyurethane, polyethylene, polystyrene, styrene butadiene, silicone, and polyester can be used. The material for forming the stretchable material is not necessarily limited to these materials. For example, a known material having stretchability such as a thermoplastic elastomer, a plastic sheet, or a rubber sheet can be used. It is particularly preferable to use a thermoplastic elastomer. Examples of the thermoplastic elastomer include styrene elastomers, olefin elastomers, polybutadiene elastomers, polyester elastomers, polyamide elastomers, urethane elastomers, vinyl chloride elastomers, and fluorine elastomers. , Ionomer resins, silicone resins, and the like can be used. These thermoplastic elastomers may be used alone or in combination of two or more.

  The disposable diaper according to the present invention can be applied to diapers for infants and the elderly. Therefore, the present invention can be suitably used in industries related to childcare and nursing care.

1 Front Body 1a Front Body Exterior Body 2 Back Body
2a Rear body exterior body 3 Crotch 3a Absorbent body 10 Outer sheet 11 Folding part 12 Folding line 13 Inner sheet 20 Waist elastic material 20a Upper elastic material group 20b Lower elastic material group 21 Waist gather 22 Tammy elastic material 30 Cushion forming sheet 31 Joint part 32 Non-joint part 33 Space 40 Absorber 41 Core wrap sheet 42 Three-dimensional gather 50 Top sheet 60 Back sheet 61 Cover sheet 70 Intermediate sheet 100 Disposable diaper 101 Waist opening part 102 Leg part opening part

Claims (3)

In a disposable diaper comprising a front body (1), a back body (2), and a crotch part (3) located between the front body (1) and the back body (2),
The outer sheet (10) located in the front body (1) and / or the back body (2) is folded back to the skin contact surface side of the disposable diaper to form a folded portion (11). And
Between the outer sheet (10) and the folded part (11), a plurality of waist elastic members (20) are arranged in a direction along the folded line (12) of the outer sheet (10),
Between the folded portion (11) and the plurality of waist elastic members (20), a cushion forming sheet (30) is disposed,
The cushion forming sheet (30) is intermittently joined to the inward surface of the folded portion (11) in a direction along the folded line (12),
Among the plurality of waist elastic materials (20), one or more waist elastic materials positioned on the folding line (12) side are defined as an upper elastic material group (20a), and other waist elastic materials (20) are positioned on the crotch portion (3) side. When the waist elastic material is the lower elastic material group (20b),
The upper elastic member group (20a) is fixed in an extended state between the outer sheet (10) and the cushion forming sheet (30),
Between the lower elastic material group (20b) and the cushion forming sheet (30), at least one sheet material is further interposed.
The lower stretchable material group (20b) is a disposable diaper that is fixed in an extended state between the outer sheet (10) and the sheet material. The disposable diaper comprises an absorbent body (40) disposed over the front body (1) and the back body (2) with the crotch part (3) as a center, and the absorbent body (40) on the skin contact surface side. A liquid-permeable top sheet (50) for covering from the above and a liquid-impermeable back sheet (60) for covering the absorbent body (40) from the skin non-contact surface side,
The top sheet (50) and the back sheet (60) are joined to each other so as to surround the absorber (40), thereby enclosing the absorber (40),
The at least a part of the top sheet (50) and a part of the back sheet (60) are interposed between the lower elastic member group (20b) and the cushion forming sheet (30). The disposable diaper described. The disposable diaper according to claim 1, wherein an intermediate sheet (70) formed of a nonwoven fabric is interposed between the lower stretchable material group (20b) and the cushion forming sheet (30).

Images