KR101851038B1 - Disposable diaper - Google Patents

Abstract

The stretchable nonwoven fabric in which the stretchable and contractible portion 80 made of the stretchable nonwoven fabric is formed on the wrapped portion around the wearer's body is such that the stretchable material is fixed to the nonwoven fabric sheet and the nonwoven fabric sheet and the stretchable and contractible material act integrally, 80 are formed so as to contract in a direction along the periphery of the body, and a cell-forming sheet 82 made of a nonwoven fabric is disposed on a part of the contact surface per skin at the portion where the stretchable and contractible portion 80 is formed, 82 and the stretchable and contractible portion 80 are formed by the abutting portion 84 and the stretchable and contractible portion 80 by the joining portion 84, Wherein a cell 86 extending in an intersecting direction intersecting with a contraction direction of the stretchable and contractible portion 80 is formed in the space between the layers of the elastic member 80. [

Description

Disposable diaper [0002]

The present invention relates to a disposable diaper.

Disposable diapers are absorbent articles which are mounted so as to wrap around the waist of a wearer and have an absorbent body for absorbing and retaining excretion.

In the above disposable diaper, stretching along the waist edge of the portion encapsulated around the waist or along the side edge of the portion covering the crotch (for example, along the peripheral edge of the leg opening) It is practiced to fix the ashes. The stretchable material is fixed for the purpose of improving the feeling of fit and fit and preventing leakage of excretion from the waist opening and the leg opening.

However, just by fixing the stretchable material in the stretched state, flexibility and cushioning properties may be insufficient even if stretchability can be imparted to the stretchable material fixing part. For example, 1) the fixing by the stretchable material is so strong that a rubber mark (tie mark) is formed on the wearer's skin, 2) the stretchable material fixing portion tends to become hard due to coating of the adhesive or heat fusion of the stretchable material, 3) In particular, when the edges of the waist opening and the leg opening are hardened, there is a problem that the wearer's own skin as well as the fingers of the person performing the exchange work may be damaged.

Accordingly, in the disposable diaper, various proposals have been made to improve flexibility and cushioning while imparting stretchability to the elastic member. For example, an outer covering material of an absorbent article is formed by an outer-layer sheet, an inner-layer sheet and a plurality of elastic members, and the outer-layer sheet and the inner-layer sheet are joined by a joint portion formed intermittently in the waist- A pants-type absorbent article which is arranged in the waist-surrounding direction so that the elastic member does not pass through the joining portion is proposed (see Patent Documents 1 to 5).

In this pants-type absorbent article, the elastic member is not fixed to the outer-layer sheet and the inner-layer sheet. Therefore, when the elastic member is contracted, the outer-layer sheet and the inner-layer sheet are bent so as to be separated from each other, and a plurality of lines of walls (irregularities) extending from the outer end to the inner end of the waist are formed.

JP2008-136793A JP2008-136794A JP2008-142316A JP2008-142341A JP2008-142342A

The pants-type absorbent article described in Patent Documents 1 to 5 is thought to improve the flexibility, cushioning and the like of the stretchable material arranging portion by giving a volume in the lamination direction of the outer layer sheet and the inner layer sheet by the convex portion of the wall .

However, in the structures described in Patent Documents 1 to 5, since the outer layer sheet and the inner layer sheet are bonded in both the waist circumferential direction and the perpendicular direction thereof, the movement of the outer layer sheet and the inner layer sheet is restricted, There is a problem that the outer-layer sheet and the inner-layer sheet are difficult to bend even if they shrink. Therefore, a high convex portion is hardly formed, and the effect of improving flexibility and cushioning is insufficient.

In the above structure, air or moisture inside the diaper is discharged to the outside of the diaper through the concave portion of the wall, so that improvement of ventilation and dehumidification can be expected. However, there is a problem in that the moisture is condensed on the concave surface of the wall, and water adheres to the skin of the wearer. Flushing water with moisture causes rubbing of the stretchable portion on the skin, which is not preferable because it causes skin troubles.

There is a possibility that air or moisture in the inside of the diaper flows into the space formed between the convex portion of the outer layer sheet and the convex portion of the inner layer sheet through the inner layer sheet without passing through the concave portion of the wall. However, since this space is an occlusion space having no opening, air or moisture tends to stay in the occlusion space. Therefore, it is considered that ventilation or dehumidification is difficult to proceed.

The above structure is a special structure in which elastic members are arranged so as not to intermittently join the outer layer sheet and the inner layer sheet. In this structure, the elastic member is not constrained to either of the outer-layer sheet and the inner-layer sheet, and can be stretched freely. For example, even when the elastic member is arranged at an elongation of 300% at the time of manufacture, there may be a case where the elastic member is elongated beyond the elongation percentage of 300% locally at the time of use. That is, there are cases where the elastic member excessively elongates beyond the ideal elongation. Therefore, there has been a problem that the elastic member, which is hard and tense, is in contact with the skin through the inner layer sheet, which may cause pain or discomfort.

In addition, in order to obtain the above-described special structure, a precise joining technique is required at the time of manufacturing, which poses difficulty in manufacturing.

The present invention has been made in view of the above-mentioned problems of the prior art. In other words, it is possible to easily produce the elasticity, cushioning, ventilation, and moisture removing properties of the stretchable material arranging portion such as the waist end of the covering around the waist and the side edge of the crotch covering portion (for example, the periphery of the leg opening) Disclosed is a disposable diaper capable of effectively preventing leaking of excretion in a repositioning section.

As a result of intensive research to solve the problems of the prior art as described above, the present inventors have found that (1) the stretchable and contractible portion is constituted by a stretchable nonwoven fabric which is fixed to the nonwoven fabric sheet and the nonwoven fabric sheet and the stretchable and contractible material act integrally (2) placing a cell-forming sheet made of a nonwoven fabric on a part of the contact surface per skin at a portion where the stretchable and contractible portions are formed; (3) bonding the cell-forming sheet and the stretchable and contractible portion intermittently toward the contraction direction of the stretchable and contractible portion The present invention has been accomplished on the basis of the fact that the above problems are solved by forming cells extending in the crossing direction crossing the shrinking direction of the stretchable and contractible portion between the cell forming sheet and the stretching portion by the joining portion.

Specifically, according to the present invention, the following disposable diapers are provided.

[1] A crotch cloth having a crotch covering portion for covering the wearer's body and a crotch covering portion for covering the wearer's crotch with an absorbent body disposed thereon, wherein at least one of the front cover portion, the rear cover portion and the crotch covering portion The stretchable nonwoven fabric according to any one of claims 1 to 3, wherein a stretchable and nonwoven fabric portion is formed in one portion, the stretchable nonwoven fabric is fixed to the nonwoven fabric sheet and the nonwoven fabric sheet and the stretchable and contractible material integrally move, And at least one of a direction along a side edge of the crotch portion and a direction along a side edge of the crotch portion, wherein a cell-forming sheet made of a nonwoven fabric is disposed on a part of a contact surface per skin in a portion where the stretchable portion is formed, The sheet and the stretchable and contractible portion are intermittently joined to each other in the shrinking direction of the stretchable and contractible portion And a cell extending in an intersecting direction intersecting the shrinking direction of the stretchable and contractible portion is formed between the cell-forming sheet and the stretchable and contractible portion by the joining portion.

[2] The disposable diaper according to [1], wherein the cell is a non-penetrating cell whose one end is open and the other end is closed.

[3] The diaper according to any one of [1] to [3], wherein the cell is an open cell having an end close to the outer space of the diaper and having an end remote from the outer space of the diaper, , And an inward cell in which an end portion closer to the outer space of the diaper is closed by the abutment portion is formed in the disposable diaper.

[4] The disposable diaper according to [3], wherein a plurality of cells are arranged in parallel in the contraction direction, and the cell rows are alternately arranged between the outward cells and the inward cells.

[5] The disposable diaper according to [4], wherein the abutment portion is a zigzag or dashed abutment continuing in the shrinking direction, and the outward cell and the inward cell are alternately partitioned by the abutment portion.

[6] A cell array in which a plurality of cells are arranged in parallel in the contraction direction is formed, and the cell columns are arranged in a plurality of stages toward the intersecting direction, And the plurality of cell rows are arranged such that a portion extending in the intersecting direction is not arranged in a straight line, of the joining portions forming the cells in the cell row adjacent to the one cell row, To [5]. [5] The disposable diaper according to any one of [1] to [5].

[7] The cell array according to any one of [1] to [7], wherein the extension of the portion extending in the cross direction among the junctions forming the cell in one cell array passes through the cell in the cell line adjacent to the one cell line The disposable diaper according to the above [6].

[8] An elastic member made of the elastic nonwoven fabric is formed at least on the left and right side edges of the crotch cane portion, the elastic member is formed to contract in a direction along a side edge of the crotch cane portion, Forming sheet composed of a water-repellent non-woven fabric is disposed on a part of the contact surface per skin in the crotch region of the crotch region, and a joint portion for intermittently joining the cell-forming sheet and the stretchable and contractible portion in the direction along the side edge of the crotch- The disposable diaper according to the above-mentioned [1], wherein a cell extending in an intersecting direction intersecting with a side edge of the crotch portion is partitioned by the joint between the cell-forming sheet and the stretchable and contractible portion.

[9] The stretchable and contractible nonwoven fabric according to any one of [1] to [4], wherein the stretchable and contractible portion formed of the stretchable nonwoven fabric is formed at least on the end portion of the crotch- And a joint portion for intermittently joining the cell-forming sheet and the stretchable and contractible portion in the direction of the body periphery is formed at the end portion of the cell-forming sheet, The disposable diaper according to the above [8], wherein cells extending in an intersecting direction intersecting with the circumferential direction of the body are defined between the cell-forming sheet and the layer of the stretchable and contractible portion.

[10] The medical instrument according to any one of [1] to [10], wherein the stretchable and contractible portion made of the stretchable nonwoven fabric is formed at least on the crotch portion on the side of the crotch covering portion so that the stretchable and contractible portion contracts in the direction along the periphery of the body, Forming sheet formed of a water-repellent non-woven fabric is disposed on a part of the contact surface per side of the skin at the end of the cell-forming sheet, and a joint portion for intermittently joining the cell-forming sheet and the stretchable / The disposable diaper according to the above [9], wherein cells extending in the direction intersecting the circumferential direction of the body are defined between the cell-forming sheet and the stretchable and contractible portion.

A crotch portion provided on an end portion of the crotch portion; a crotch portion provided on an end portion of the crotch portion; and a crotch portion provided on an end of the crotch portion, And a joint portion for intermittently joining the cell forming sheet and the leg stretching and shrinking portion toward the shrinking direction of the leg stretching and shrinking portion And a cell extending in an intersecting direction intersecting with the contraction direction of the leg stretching and shrinking portion is formed by partitioning between the cell forming sheet and the layer of the leg stretching and shrinking portion by the abutting portion.

[12] The stretchable and contractible member according to any one of [1] to [6], wherein the stretchable material is disposed between the layers of the plurality of nonwoven fabric sheets, and the stretchable material is fixed to the plurality of nonwoven fabric sheets, 8] The disposable diaper according to any one of [8] to [11].

[13] The disposable diaper according to any one of [8] to [11], wherein the stretchable and contractible portion is fixed to the nonwoven fabric sheet and the nonwoven fabric sheet and the stretchable film integrally move.

[14] The method according to any one of [8] to [11], wherein the cell-forming sheet and the stretchable and contractible portion are intermittently directed toward the shrinking direction of the stretchable and contractible portion and also joined by a joint portion continuously formed in a direction orthogonal to the contraction direction of the stretchable portion. The disposable diaper according to any one of claims 1 to 3.

[15] The method according to any one of [8] to [11], wherein the cell-forming sheet and the stretchable and contractible portion are joined by intermittently joined joints in both directions of the shrinkage direction of the stretchable and contractible portion and the direction orthogonal to the contraction direction of the stretchable and contractible portion And the diaper.

The disposable diaper according to the present invention is excellent in flexibility, cushioning, ventilation, and moisture removal properties, such as the waist end portion of the waist-surrounding waist portion and the waist portion of the waist-surrounding waist portion and the waist portion of the crotch portion (for example, the periphery of the leg opening portion) Can be manufactured. It is also possible to effectively prevent leakage of the excretion in the stretchable material arranging portion.

1A is a front view schematically showing one embodiment of the disposable diaper according to the present invention.
Is a schematic plan view schematically showing a state in which the disposable diaper shown in Fig. 1B is unfolded and viewed from the direction of the top sheet.
1C is a schematic cross-sectional view schematically showing a cutting section taken along the line A-A 'of the disposable diaper shown in Fig. 1B.
Fig. 1D is a schematic cross-sectional view schematically showing a cutting section taken along the line B-B 'of the disposable diaper shown in Fig. 1B.
FIG. 1E is a schematic plan view schematically showing a state in which the disposable diaper shown in FIG. 1A is unfolded and viewed in the direction of an outer sheet.
Fig. 1F is a perspective view schematically showing the vicinity of the elastic member of the disposable diaper shown in Fig. 1A.
FIG. 1G is a schematic cross-sectional view schematically showing a cross section taken along the line X-X 'of the disposable diaper shown in FIG. 1F.
Fig. 2A is a schematic plan view schematically showing a state in which the joint portion of the disposable diaper shown in Fig. 1B is enlarged and viewed from the top sheet direction. Fig.
FIG. 2B is a schematic cross-sectional view schematically showing a cross section taken along the line X-X 'of the disposable diaper shown in FIG. 2A.
2C is a schematic cross-sectional view schematically showing a Y-Y 'cutting section of the disposable diaper shown in FIG. 2A.
FIG. 3A is a schematic plan view schematically showing a state of the junction of the disposable diaper according to the present invention as viewed from the direction of the top sheet. FIG.
FIG. 3B is a schematic cross-sectional view schematically showing the Y-Y 'cutting section of the disposable diaper shown in FIG. 3A.
Fig. 4A is a schematic plan view schematically showing another state of the joint portion of the disposable diaper according to the present invention as viewed from the direction of the top sheet. Fig.
FIG. 4B is a schematic cross-sectional view schematically showing a cross section taken along the line X-X 'of the disposable diaper shown in FIG. 4A. FIG.
4C is a schematic cross-sectional view schematically showing a Y-Y 'cut section of the disposable diaper shown in FIG. 4A.
Fig. 5A is a schematic plan view schematically showing a state in which the joint portion of the disposable diaper according to the present invention is enlarged and viewed from the direction of the top sheet. Fig.
5B is a schematic cross-sectional view schematically showing a cross section taken along the line X-X 'of the disposable diaper shown in FIG. 5A.
Fig. 6A is a schematic plan view schematically showing a state in which the joint portion of the disposable diaper according to the present invention is enlarged and viewed from the direction of the top sheet. Fig.
FIG. 6B is a schematic cross-sectional view schematically showing a cross section taken along the line X-X 'of the disposable diaper shown in FIG. 6A. FIG.
6C is a schematic sectional view schematically showing the Y-Y 'cutting section of the disposable diaper shown in Fig. 6A. Fig.
Fig. 7A is a schematic plan view schematically showing another state of the joint portion of the disposable diaper according to the present invention as viewed from the direction of the top sheet. Fig.
FIG. 7B is a schematic cross-sectional view schematically showing a cross section taken along the line X-X 'of the disposable diaper shown in FIG. 7A. FIG.
7C is a schematic sectional view schematically showing the Y-Y 'cutting section of the disposable diaper shown in Fig. 7A.
Fig. 8A is a schematic plan view schematically showing a state in which the joint portion of the disposable diaper according to the present invention is enlarged and viewed from the top sheet direction. Fig.
8B is a schematic cross-sectional view schematically showing a cross section taken along the line X-X 'of the disposable diaper shown in Fig. 8A.
8C is a schematic cross-sectional view schematically showing the Y-Y 'cutting section of the disposable diaper shown in FIG. 8A.
Fig. 9 is a schematic plan view schematically showing a state in which the joint portion of the disposable diaper according to the present invention is enlarged and viewed from the direction of the top sheet. Fig.
Fig. 10A is a view showing a modified example of the disposable diaper shown in Fig. 8A, and is a schematic sectional view schematically showing a cross section corresponding to a cross-sectional view taken along the line X-X 'in Fig. 8A.
Fig. 10b is a schematic cross-sectional view schematically showing a cross section corresponding to a cross-sectional view taken along the line X-X 'in Fig. 8a, showing another modified example of the disposable diaper shown in Fig. 8a. Fig.
Fig. 11A is a schematic process chart schematically showing the manufacturing process of the disposable diaper shown in Fig. 1A, and shows each process seen from the direction of the inner sheet.
Fig. 11B is a schematic cross-sectional view schematically showing a cut section taken along the widthwise center of the structural unit shown in Fig. 11A in each step shown in Fig. 11A. Fig.
12 is a perspective view schematically showing another embodiment of the disposable diaper according to the present invention.
12B is a partial cutout outline plan view schematically showing a state in which the disposable diaper shown in Fig. 12A is stretched and viewed from the top sheet direction. Fig.
Fig. 12C is a schematic cross-sectional view schematically showing a cutting section taken along line A-A 'of the disposable diaper shown in Fig. 12B.
FIG. 12D is a schematic cross-sectional view schematically showing a cutting section taken along line B-B 'of the disposable diaper shown in FIG. 12B.
Fig. 12E is a schematic plan view schematically showing a state in which the disposable diaper shown in Fig. 12A is spread and viewed from the direction of the outer sheet.
FIG. 12F is a schematic cross-sectional view schematically showing a cutting section taken along the line A-A 'in the use state of the disposable diaper shown in FIG. 12B.
13A is a schematic plan view schematically showing still another embodiment of the disposable diaper according to the present invention.
Fig. 13B is a schematic cross-sectional view schematically showing a cutting section along the line A-A 'of the disposable diaper shown in Fig. 13A.
Fig. 13C is a schematic cross-sectional view schematically showing a cutting section taken along the line B-B 'of the disposable diaper shown in Fig. 13A.
Fig. 13D is a schematic rear view of the disposable diaper shown in Fig. 13A. Fig.
Fig. 14A is a schematic plan view schematically showing a stretchable nonwoven fabric which is a constituent member of the disposable diaper shown in Fig. 13A. Fig.
Fig. 14B is a schematic cross-sectional view schematically showing a cross-section taken along line A-A 'of the stretchable nonwoven fabric shown in Fig. 14A.
Fig. 14C is a schematic cross-sectional view schematically showing a cross section taken along line B-B 'of the stretchable nonwoven fabric shown in Fig. 14A. Fig.
15A is a schematic plan view schematically showing an embodiment of the disposable diaper according to the present invention.
Fig. 15B is a schematic cross-sectional view schematically showing a cutting section taken along line A-A 'of the disposable diaper shown in Fig. 15A.
15C is a schematic rear view of the disposable diaper shown in Fig. 15A. Fig.
Fig. 15D is a perspective view schematically showing the vicinity of the elastic part of the disposable diaper shown in Fig. 15A. Fig.
FIG. 15E is a schematic cross-sectional view schematically showing a cross section taken along the line X-X 'of the disposable diaper shown in FIG. 15D. FIG.
Fig. 15F is a schematic plan view showing an enlarged view and a schematic representation of the shape of the junction of the disposable diaper shown in Fig. 15A, showing the state in which the cell-forming sheet is peeled off.
Fig. 16A is a schematic plan view showing an enlarged view of another form of the joint portion of the disposable diaper, and shows a state in which the cell-forming sheet is peeled off.
Fig. 16B is a schematic plan view schematically showing an enlarged view of still another form of the joint portion of the disposable diaper, and shows a state in which the cell-forming sheet is peeled off.
Fig. 16C is a schematic plan view schematically showing another embodiment of the junction of the disposable diaper, showing a state in which the cell-forming sheet is peeled off. Fig.
17A is a schematic plan view schematically showing another embodiment of the disposable diaper of the present invention.
Fig. 17B is a schematic cross-sectional view schematically showing a cutting section along the line A-A 'of the disposable diaper shown in Fig. 17A. Fig.
Fig. 17C is a schematic cross-sectional view schematically showing a cutting section taken along the line A-A 'in the use state of the disposable diaper shown in Fig. 17A. Fig.
18A is a schematic sectional view schematically showing still another embodiment of the disposable diaper according to the present invention. Sectional view corresponding to the cutting section shown in Fig. 17C in the use state. Fig.
18B is a schematic sectional view schematically showing still another embodiment of the disposable diaper according to the present invention. Sectional view corresponding to the cutting section shown in Fig. 17C in the use state. Fig.
19A is a perspective view schematically showing another embodiment of the disposable diaper according to the present invention.
Fig. 19B is a schematic plan view schematically showing a state in which the disposable diaper shown in Fig. 19A is developed and viewed from the top sheet direction. Fig.
FIG. 19C is a schematic cross-sectional view schematically showing a cutting section along line A-A 'of the disposable diaper shown in FIG. 19B.
FIG. 19D is a schematic cross-sectional view schematically showing a cutting section taken along line B-B 'of the disposable diaper shown in FIG. 19B.
Fig. 19E is a schematic plan view schematically showing a state in which the disposable diaper shown in Fig. 19A is unfolded and viewed from the direction of the outer sheet. Fig.
20A is a schematic plan view schematically showing a state in which the disposable diaper according to the present invention is spread and viewed from the direction of the top sheet.
20B is a schematic cross-sectional view schematically showing a cutting section taken along line A-A 'of the disposable diaper shown in Fig. 20A.
20C is a schematic cross-sectional view schematically showing a cutting section taken along the line B-B 'of the disposable diaper shown in Fig. 20A.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the disposable diaper according to the present invention will be described in detail with reference to the drawings. The same members are denoted by the same reference numerals and the description thereof may be omitted. A perspective view schematically showing the disposable diaper 201B shown in Fig. 20A is expressed in the same manner as Fig. 12A. A schematic plan view schematically showing a state in which the disposable diaper 201B is extended and viewed from the direction of the outer sheet is represented in the same manner as in Fig. 12E. Therefore, in the description of the disposable diaper 201B, FIGS. 12A and 12E can also be referred to together.

[1] Basic structure of the disposable diaper of the present invention:

The disposable diaper according to the present invention is a disposable diaper comprising a disposable diaper 1b shown in Figs. 1A, 1B and 1D, a disposable diaper 1B shown in Figs. 19A, 19B and 19D, 2 and a crotch portion 4 in which a rear portion 6 and an absorbent body 22 are disposed to cover the wearer's crotch.

[1-1] Disposable Diapers:

The " disposable diaper " includes various forms such as pants type and tape type. However, the present invention broadly includes disposable diapers having specific features, and is not limited to the pants type, the tape type, etc. shown below.

[1-2] Whole and posterior parts:

Quot; and " posterior feces portion " are portions that surround the wearer's body of the disposable diaper.

In the present specification, in the case where the absorber is continuously arranged from the crotch part to the front part and the post part, the distance between the end part of the absorbing body and the extension line of the end part Quot; waisted portion ", the end edge of the absorbent body and the crotch side portion from the extension of the end edge are referred to as " dummy covered portion ".

The phrase " wrap around the torso " means that a tubular structure surrounding the wearer's body is formed by a part of the disposable diaper, or a form in which the tubular structure can be formed. As the diaper having the " tubular structure formed therein ", there is a pants-type disposable diaper.

The "pants type" is a pants type in which one front opening 10 and a pair of right and left leg openings 12 are formed in advance, like the disposable diaper 1a shown in Fig. 1A and the disposable diaper 1B shown in Fig. 19A Refers to a disposable diaper.

The disposable diaper 1B shown in Figs. 1A, 1B, and 1E, Figs. 19A, 19B, and 19E has the side edges 62a, 62b of the front and front exteriors 62, 65 are joined to each other to form a tubular structure surrounding the wearer's body. In this form, the tubular structure is formed by the region between the left and right joint portions 7, 8 of the casing 16. [ Therefore, the region is referred to as the forehead portion 2 or the posterior portion 6.

The disposable diaper 1A shown in Figs. 1A, 1B and 1E, the disposable diaper 1B shown in Figs. 19A, 19B and 19E is configured such that the excretory body 16 is attached to the front exteriors 62, 65 as shown in Fig. However, it is also a form of " pants type " in which the casing is integrally formed without separating back and forth, and one waist opening portion and a pair of left and right leg opening portions are formed in advance.

For example, the disposable diaper 201A shown in Figs. 12A, 12B, and 12E and the disposable diaper 201B shown in Fig. 20A have side edges 202a and 202b of an integrally- The ribs 206a and 206b are joined to each other to form a tubular structure surrounding the wearer's torso. In this configuration, the tubular structure is formed by the region between the left and right junctions 207, 208 of the casing 216. [ Therefore, the region is referred to as the forehead 202 or the posterior portion 206.

As the diaper having the " shape in which the tubular structure can be formed ", there can be mentioned a disposable diaper of a similar pants type or a tape type.

Similar pants type " refers to a disposable diaper 1A shown in Figs. 1A, 1B and 1E, a disposable diaper 1B shown in Figs. 19A, 19B and 19E, or Figs. 12A, 12B and 12E A disposable diaper 201A in the form of a disposable diaper 201B shown in Fig. 20A or a detachable fastener (mechanical fastener or the like) in place of the abutting portions 7, 8 or the abutting portions 207, Lt; / RTI >

In this " similar pants type, " the engaging force of the fastener makes it possible to detachably engage a portion of the outer body covering the front side and a portion covering the rear side of the wearer with these two side edges. Thus, a tubular structure surrounding the wearer's torso can be formed. With respect to the "pant-pants type", the tubular structure is formed by the area between the fasteners on both side edges of the external body. Therefore, the region is referred to as a pre-embryo portion or a post-embryo portion.

The "tape type" is a disposable diaper 301A shown in Figs. 13A and 13D. The disposable diaper 301A shown in Figs. 13A and 13D includes left and right side edges of a portion covering the wearer's back side Refers to a disposable diaper to which the adhesive tape 311 is attached so as to extend from the side edges 374a and 374b of the rear side flap 374. [

As shown in Figs. 13A and 13D, Fig. 15A and Fig. 15D, the " tape type " is a structure in which a base material 350 constituting the fastening tape 311 is fastened with a fastening member ). Therefore, by fixing the fastening member (the loop member 346 of the mechanical fastener forming the front patch 313 in the example shown in the figure) covering the front side of the wearer, the tubular structure surrounding the body of the wearer .

The " tape type " does not mean that a tubular structure is formed in advance like the " pants type ". Therefore, the " front cover " and " post cover " in the " tape type " As defined below.

In the case where the diaper body is formed in an hourglass shape (a shape in which the front and rear waist edges are broadly narrowed narrowly toward the crotch side, as in the case of the external body 216 shown in Figs. 12B and 20A) An area between the straight line connecting the starting points of the narrowed places on the side of the end edge and the west end edge on the front side of the diaper is referred to as a " front end portion ", and the starting points of the narrowed places on the waist edge side of the back of the diaper The area between the straight line and the waist edge at the back of the diaper is referred to as " posterior waist ".

The disposable diaper 301A shown in Figs. 13A and 13D is provided on the waist edge 370c side of the diaper body 370 as in the disposable diaper 301B shown in Figs. 15A and 15C, The rear side flap 374 is attached and the front side flap 372 separate from the diaper body 370 is laid on the side of the waist edge 370d as well as the front side flap 372 on the diaper crotch side 370b of the diaper main body 370 is referred to as a "front flap" and a region between the straight line that connects the intersections of the side edges 370a, 372 of the diaper body 370 with the side edges 370a, 370b of the diaper body 370 and the waist edge 370d, 374b and the side edges 370a, 370b of the diaper body 370 and the waist edge 370c is referred to as a "posterior shoulder portion".

Further, when only the rear side flap, which is separate from the diaper main body, is attached to the diaper main body and the front side flap is not laid, the intersection points of the back side flap and the side edge of the diaper main body on the diaper crotch side The area between the binding straight line and the waist edge is referred to as a " posterior shoulder ", and the area overlapping the " posterior shoulder " when the diaper main body is folded so that the waist edge rims overlap each other is referred to as "

[1-3] Crotch Aspiration:

The " crotch portion " refers to a portion of the disposable diaper that covers the crotch of the wearer. In other words, it is the part between the preformed part and the posterior part.

In the crotch part, an absorber for absorbing and retaining excreta is disposed. The constitution of the absorber is not particularly limited, and an absorber used in a conventionally known absorbent article can be used. The specific structure of the absorber will be described later.

In the disposable diaper 1A shown in Figs. 1A, 1B, 1D, and 1E, the disposable diaper 1B shown in Figs. 19A, 19B, 19D and 19E, Absorbent main body 14 is disposed and joined (bonded portion 28) so as to extend between the absorbent main body 14 and the absorbent main body 65. In this embodiment, the front sheath 2 is fixed by the front sheath 62 and the rear sheath 6 is formed by a part of the back sheath 65 and a part of the back sheath 65 and the absorbent main body 14, the crotch portion 4 is formed. The absorbent body 22 is disposed as a constituent member of the absorbent main body 14.

In the disposable diaper 201A shown in Figs. 12A, 12B, 12D and 12E, and the disposable diaper 201B shown in Figs. 20A and 20C, the absorbent main body 14 and the external body 216, (Not shown). The area between the straight line that binds the starting point of the constricted portion on the side of the west end edge 202c on the side edge of the casing 216 and the straight line that binds the origin points of the constricted side on the west end edge 206c side Is the crotch part 204.

Disposable diapers 301A shown in Figs. 13A and 13D In the disposable diapers 301B shown in Figs. 15A and 15D, the diaper body 370 forms the crotch-containing portion 304. Fig. The straight line connecting the intersections of the front side flaps 372 on the diaper crotch side and the side edges 370a and 370b of the diaper body 370 and the straight line connecting the rear side flap 374 and the diaper main body 370, And the straight line connecting the intersections of the side edges 370a and 370b of the crotch portion 370 with each other.

[2] Characteristic constitution of the disposable diaper of the present invention:

The disposable diaper according to the present invention includes the following first and second embodiments.

[2-1] First embodiment:

In the first embodiment of the disposable diaper according to the present invention, like the disposable diaper 1A shown in Figs. 1B and 1D, the stretchable and contractible portion 80 made of the stretchable nonwoven fabric is formed on the posterior portion 6 and the like, (80) is contracted in a direction along the periphery of the body. 1) the stretchable and contractible portion is composed of a stretchable nonwoven fabric which is fixed to the nonwoven fabric sheet and the nonwoven fabric sheet and the stretchable and contractible material act integrally; 2) A cell forming sheet 82 made of a nonwoven fabric is disposed in a part of the cell forming sheet 82 and a bonding portion 84 for bonding the cell forming sheet 82 to the stretching and shrinking portion 80 is formed, A cell 86 extending in an intersecting direction intersecting with the contraction direction of the stretchable and contractible portion 80 is divided and formed between the sheet 82 and the stretchable and contractible portion 80; (4) And the other end is a closed non-penetrating cell.

1F and Fig. 1G, the distance between the cell-forming sheet 82 and the abutting portion 84 of the stretchable and contractible portion 80 can be narrowed by the contraction of the stretchable and contractible portion 80. [ As a result, the cell forming sheet 82 and the stretchable and contractible portion 80 are bent and deformed into a waveform, so that the portion (non-bonded portion) other than the bonded portion 84 of the stretchable and contractible portion 80 is separated from the cell- A vent pipe, and a cell 86 functioning as a cushion are formed.

In the above structure, moisture contained in the inner space of the diaper may be contained in the inside of the cell 86. Therefore, moisture can collect on the surface of the cell-forming sheet 82 stacked on the stretchable and contractible portion 80 (the contact surface per skin just above the stretchable and contractible portion 80), and consequently, skin trouble can be suppressed from occurring. Further, since moisture on the contact surface per unit area just above the stretchable and contractible portion 80 is hard to be condensed, the dry state of the contact surface per skin can be maintained, and a comfortable wearing feeling can be obtained.

In addition, when the wearer moves (an action of taking a sitting posture, a walking action, etc.), the diaper is deformed and the cell 86 is deformed in accordance with the deformation. With the deformation of the cell 86, the air or moisture in the inner space of the diaper enters and exits the cell 86, and the process is repeated. Particularly, with respect to the above structure, as shown in Figs. 1F and 2B, one end of the cell 86 is opened, and the end of the cell forming sheet 82 in the opening is a free end. Therefore, the functions of the cell-forming sheet 82 and the stretchable and contractible portion 80 are not restricted with respect to the opening, and the cell-forming sheet 82 and the stretchable and contractible portion 80 can be sufficiently bent. That is, the cell 86 can be largely opened. Therefore, ventilation and dehumidification of the inner space of the diaper are promoted, and the inner space of the diaper can be made a pleasant environment.

Further, the cell exerts a buffering function like an air cushion. Therefore, the touch feeling on the skin is smooth, and the flexibility around the waist of the diaper can be improved. That is, the wearer can obtain a comfortable fit. Particularly, in the above structure, since the cell forming sheet 82 and the stretchable and contractible portion 80 can be sufficiently bent, a high convex portion can be formed by the cell forming sheet 82 and the stretchable and contractible portion 80. Therefore, the cell 86 becomes a bulky structure, and the effect that the gap between the wearer's skin and the stretchable and contractible portion 80 is buried is high. That is, it is excellent in flexibility, cushioning, and prevention of leakage.

Further, in the disposable diaper of the present invention, since the cell is a non-penetrating cell whose one end is opened and the other end is closed, the excretion does not leak through the cell. It is also possible to trap the flowing slurry in the cell. Therefore, flexibility and ventilation of the stretchable and contractible portion can be improved while preventing leakage of the slurry.

[2-2] Second embodiment:

The disposable diaper according to the second embodiment of the present invention is similar to the disposable diaper 301B shown in Figs. 15A to 15C except that 1) the stretchable and contractible portion 380 is fixed to the nonwoven fabric sheet, 3) the stretchable and contractible portion 380 is made of a stretchable nonwoven fabric acting as a crotch portion 304 (hereinafter, referred to as " stretchable nonwoven fabric " (The side edges 370a and 370b of the diaper body 370 in this embodiment); (4) the side edges 370a and 370b of the crotch part 304 The cell forming sheet 382 and the stretchable and contractible portion 380 are arranged intermittently in the direction along the side edge of the crotch covering portion 304 6) the joint portion 3 is formed at the joining portion 384 A cell 386 extending in an intersecting direction intersecting the side edge of the crotch portion 304 is formed between the cell forming sheet 382 and the layer of the stretchable and contractible portion 380 .

15 (d) and 15 (e), the distance between the joining portions 384 of the cell-forming sheet 382 can be narrowed by the contraction of the stretchable and contractible portion 380. In this disposable diaper, As a result, the cell forming sheet 382 is bent and deformed into a waveform, and the cell forming sheet 382 is separated from the joining portion 384 of the stretchable and contractible portion 380 (non-joining portion) A cell 386 is formed.

The cell 386 exhibits a buffering function like an air cushion. Therefore, the touch feeling on the skin is smooth, and the flexibility around the waist of the diaper can be improved. That is, the wearer can obtain a comfortable fit.

When the wearer takes a sitting posture, the diaper is compressed from the outside, and the moisture in the inner space of the diaper is discharged to the outside space through the cell 386. [ In addition, when the wearer makes a walk, the crotch covering portion of the diaper is deformed by the movement of the legs. Therefore, the moisture in the inner space of the diaper is discharged to the outer space by the deformation, Into the space. Accordingly, the inner space of the diaper can be made a comfortable environment.

[2-3] Elastic section:

The stretchable and contractible portion is made of a stretchable nonwoven fabric. In the "elastic nonwoven fabric", the nonwoven fabric itself has elasticity, and a nonwoven fabric in which a stretchable material (an elastic material such as rubber or thermoplastic elastomer) in an elongated state is fixed (joined) to a nonwoven fabric made of a base material, .

Examples of the nonwoven fabric itself having elasticity include commercially available elastomeric nonwoven fabrics and elastomer spunbond nonwoven fabrics. Specifically, Streflex (manufactured by Idemitsu Unitech Co., Ltd.), Sfan Shione (manufactured by KB Seiren Co., Ltd.) and the like can be suitably used as the trade names. Such an elastomeric nonwoven fabric or an elastomeric spunbonded nonwoven fabric has elasticity by itself.

The nonwoven fabric to which the stretchable material in the stretched state is fixed to the nonwoven fabric and to which elasticity is imparted can be constituted by suitably combining the nonwoven fabric and the stretchable material. For example, the disposable diaper 301A shown in Figs. 13A and 13C can be used as a material constituting the stretchable and contractible portion 381 by stretching a stretched state between layers of a plurality of nonwoven fabric sheets 397 and 398 shown in Figs. 14A to 14C 399 and the elastic members 399 are fixed to the plurality of nonwoven fabric sheets 397, 398 so that the plurality of nonwoven fabric sheets 397, 398 and the elastic members 399 are integrally and elastically deformed Nonwoven fabric is used. Unlike the pants-type absorbent articles of Patent Documents 1 to 5, the stretchable nonwoven fabric in which the nonwoven fabric and the stretchable material act integrally is used, whereby the stretchable material does not extend beyond the sheet width. Also, the stretchable material does not stretch excessively beyond the ideal elongation.

The stretchable nonwoven fabric may be such that the stretchable film is fixed to the nonwoven fabric sheet and the nonwoven fabric sheet and the stretchable film act integrally. Such a stretchable nonwoven fabric also has the same effect as a stretchable nonwoven fabric having a structure in which a stretchable material in a stretched state is fixed between layers of a plurality of nonwoven fabric sheets. In this type of stretchable nonwoven fabric, the nonwoven fabric sheet is fixed to at least one side of the stretchable film. The nonwoven fabric sheet may be fixed on both sides of the stretchable film.

Generally, a disposable diaper has a structure in which a linear expansion and contraction member is disposed between layers of a nonwoven fabric. Therefore, it is not always necessary to arrange the stretchable nonwoven fabric to constitute the stretchable and contractible portion, and the stretchable and contractible portion may be constituted by using part of the structure of the conventional disposable diaper as the stretchable nonwoven fabric.

The disposable diaper 1A shown in Fig. 1D has a structure in which the folded portion 88 of the outer sheet 63 constituting the front outer body 62 and the interlayer between the pressing sheet 68, A stretchable waist stretchable material 42 is disposed between the folded portion 88 of the sheet 66 and the pressing sheet 68. [ The waist stretchable material 42 is fixed to the folded portion 88 and the pressing sheet 68. That is, a stretchable nonwoven fabric (stretchable and shrinkable portion 80) that integrally behaves by the folded portion 88, the pressing sheet 68, and the waist stretchable material 42 is constituted.

The disposable diaper 201A shown in Fig. 12C and the disposable diaper 201B shown in Fig. 20B are arranged in such a manner that the gap between the base portion and the folded portion of the nonwoven fabric sheet 32 constituting the three- A stretchable elastic material 36 in a stretched state is disposed.

The three-dimensional gathering and stretching member 36 is fixed to the base portion and the folded portion of the nonwoven fabric sheet 32. That is, a stretchable nonwoven fabric (stretchable and contractible portion 280) that integrally behaves by the base portion, the folded portion, and the stretchable elastic material 36 of the nonwoven fabric sheet 32 is constituted.

The disposable diaper 301C shown in Fig. 17C is provided between the layers of the nonwoven fabric sheet 333 constituting the three-dimensional gatherer 327 and the base portion 379 of the nonwoven fabric sheet 334, . The elastic gathering and expanding member 337 is a stretchable nonwoven fabric 333 which is fixed to the nonwoven fabric sheet 333 and the base portion 379 and is integrally moved by the nonwoven fabric sheet 333, the base portion 379 and the elastic gathering / expanding member 337 Stretchable portion 381).

On the other hand, in the disposable diaper 1B shown in Fig. 19C, a stretchable elastic gathering material 36 in a stretched state is disposed between the base portion and the folded portion of the nonwoven fabric sheet 32 constituting the three-dimensional gatherer 26 . The elastic gathering and stretching member 36 is fixed to the base portion and the folded portion of the nonwoven fabric sheet 32 and is stretchable nonwoven fabric Stretchable and contractible portion 81).

The disposable diaper 301B shown in Fig. 15B is disposed between the side sheets 319 and the cover sheet 320 constituting the diaper body 370 and between the side sheets 319 A stretchable elastic member 340 in a stretched state is disposed between the cover sheet 324 and the layer. The leg stretchable member 340 is fixed to the side sheet 319, the cover sheet 320 and the cover sheet 324. [ That is, a stretchable nonwoven fabric (stretchable and contractible portion 380) that integrally behaves by the side sheet 319, the cover sheet 320, the cover sheet 324 and the leg stretchable member 340 is constituted.

In the first embodiment, the stretchable and contractible portion is formed so as to contract in at least one of the fore part, the back part, and the crotch part, along at least one of the direction along the body periphery and the side edge of the crotch part .

For example, in the disposable diaper 1A shown in Fig. 1D, the stretchable and contractible portion 80 is formed so as to contract in the direction along the periphery of the body of the outer casing 62 before the front casings 2 are formed. The stretchable and contractible portion 80 is formed on the back outer member 65 constituting the posterior portion 6 so as to contract in the direction along the periphery of the body. The disposable diaper 201A shown in Fig. 12C has the stretchable and contractible portion 280 formed to contract in the direction along the side edge of the absorbent main body 14 constituting the crotch cloth portion. The disposable diaper 301A shown in Fig. 13C is attached to the diaper body 370 constituting the front cancellation portion 302 and the posterior cancellation portion 306 in the direction along the body periphery (i.e., in the waist edge 370c (Stretchable nonwoven fabric 396) so as to contract in a direction along the widthwise direction (i.e.

In the second embodiment, the stretchable and contractible portions are formed so as to contract in the directions along the left and right side edges of the crotch portion. For example, the disposable diaper 301B shown in Fig. 15B has the stretchable and contractible portion 380 so as to contract in the direction along the side edges 370a and 370b of the diaper body 370 constituting the crotch cloth portion. The disposable diaper 1B shown in Fig. 19C has the stretchable and contractible portion 81 so as to contract in the direction along the side edge of the absorbent main body 14 constituting the crotch cloth portion. The disposable diaper 201B shown in Fig. 20B and the stretchable and contractible portion 81 having the same structure as the disposable diaper 1B shown in Fig. 19C are formed.

Means that the stretchable nonwoven fabric is disposed such that stretching and shrinking in the direction along the periphery of the body of the diaper is possible. The simplest structure is such that the waist edge (the waist edge 62c of the front sheath 62 in this embodiment) or the waist edge 6c of the front sheath 2 (In this embodiment, the waist stretchable material 42) is disposed along the waist edge of the back sheet member 65 (the waist edge frame 65c of the back outer member 65) have.

Means that the stretchable nonwoven fabric is arranged so that stretching and contraction can be performed in the direction along the side edge of the crotch covering portion. The term " formed to contract in the direction along the side edge of the crotch covering portion " The disposable diaper 301A shown in Figs. 13B and 13D is similar to the disposable diaper 301B shown in Figs. 15B and 15C except that the side edges of the crotch portion 304 (in this embodiment, the diaper body 370 (In this embodiment, the leg stretchable member 340) is disposed along the side edges 370a, 370b of the legs 370a, 370b.

However, the present invention is not limited to this configuration as long as the elastic nonwoven fabric shrinks in at least one of the direction along the periphery of the body and the side edge along the crotch portion. For example, a stretchable material may be disposed so as to project a convex curve or a downward convex curve with respect to a direction along the body periphery of the diaper, or a convex curve to the left or a curve convex to the right with respect to a direction along the side edge of the crotch- The elastic member may be disposed.

In the first embodiment, it is only necessary that the stretchable portion is formed on at least one of the entire cancellation portion, the posterior cancellation portion and the crotch portion. By bonding the cell-forming sheet to such a portion, flexibility can be imparted while preventing leakage of excretion. That is, the forming portion of the stretchable and contractible portion is not limited to the vicinity of the waist edge rim or the side rim of the crotch covering portion as described above.

For example, the disposable diaper 201A shown in Fig. 12C has a configuration in which a linear elastic member (not shown) is attached to the upper end of the three-dimensional gatherer 26 laid along the side edge of the absorbent main body 14 constituting the crotch- In this embodiment, the elastic gathering / expanding member 36 is disposed to form the stretchable and contractible portion 280. And a cell-forming sheet 282 is bonded to the stretchable and contractible portion 280.

1B and 1E, when a dummy stretchable material 44 is disposed on the front flap 2 or the rear flap 6 and a dummy stretchable portion is formed, The cell forming sheet may be bonded to the sheet.

In addition, as in the case of the disposable diaper 1A shown in Figs. 1A, 1B and 1E, the stretchable and contractible portion formed by the dummy stretchable material 44 with respect to the end portion of the front flap 2 on the side of the crotch portion 4, The stretchable and contractible portion formed by the leg stretchable material 38 or the elastic stretchable material 36 at the side edge portion of the crotch portion 4 and the end portion of the crotch portion 4 on the side of the rear- When the stretching portion formed by the stretching member 40 is continuously arranged, it is preferable to bond the cell forming sheet to such stretching portion. This configuration can form the cell structure so as to surround the wearer's legs. Therefore, flexibility can be imparted to the periphery of the leg opening while preventing leakage of excretion from the leg opening.

In the second embodiment, it is only necessary that the stretchable portion is formed at least on the right and left side edges of the crotch portion. However, the extensible portion may be formed on the other portion. By forming the cell-forming sheet intermittently to the stretchable and contractible portions, flexibility can be imparted in the same manner as the left and right side edge portions of the crotch-containing portion.

19E, a stretchable and contractible portion 80 made of a stretchable nonwoven fabric is formed at least on the end of the crotch portion 4 on the side of the rear portion 6, It is preferable that a cell forming sheet 83 made of a water repellent nonwoven fabric is disposed on a part of the contact surface per skin at the end on the side of the posterior portion 6 as shown in Fig. 19B . The cell forming sheet 83 is laminated on the stretchable and contractible portion and the cell forming sheet 83 and the stretchable and contractible portion are joined together by the joint portion 85 formed intermittently toward the peripheral portion of the trunk, The cell structure can be formed also at the end of the substrate.

19E, a stretchable and contractible portion 80 made of a stretchable nonwoven fabric is formed at the end of the front cannulated portion 2 on the side of the crotch portion 4, so that the stretchable and contractible portion 80 is stretched in the body peripheral direction It is preferable that a cell forming sheet 83 made of a water repellent nonwoven fabric is disposed on a part of the contact surface per side of the end of the crotch portion 4 on the side of the crotch part 4 as shown in Fig. 19B. The cell forming sheet 83 is laminated on the stretchable and contractible portion and the cell forming sheet 83 and the stretchable and contractible portion are joined together by the joint portion 85 intermittently formed toward the body peripheral direction, The cell structure can be formed also at the end of the second electrode.

19A to 19E, the stretchable and contractible portion 81 formed on the side edge portion of the crotch portion 4 and the crotch portion 4 of the frontal portion 2 are formed in the same manner as the disposable diaper 1B shown in Figs. At least one of the stretchable and contractible portion 80 formed at the end of the crotch portion 4 and the stretchable and contractible portion 80 formed at the end of the crotch portion 6 on the side of the rear end portion 6 is continuously disposed to surround the wearer's legs It is preferable that the leg stretching portion is formed. The cell forming sheets 82 and 83 are stacked on the stretchable and contractible portions of the stretched legs 82 and 83 and the stretchable and contractible portions of the stretched state are joined to the joint portions 84 and 85 formed intermittently toward the shrinking direction of the leg stretchable and contractible portion, The cell structure of the crotch portion 4 and the cell structure of the front cannulating portion 2 and / or the posterior cancellation portion 6 are successively arranged. Such a structure is preferable because flexibility can be imparted to the leg stretching and shrinking portion.

[2-4] Cell-forming sheet:

In the first embodiment, a cell-forming sheet 82 made of a water-repellent nonwoven fabric is disposed on a part of the contact surface per skin at a portion where the stretchable and contractible portion 80 is formed, as in the disposable diaper 1A shown in Figs. 1D and 1F . The cell-forming sheet 82 forms a cell structure that functions as a vent pipe and a cushion.

In the second embodiment, like the disposable diaper 301B shown in Fig. 15A, a cell-forming sheet 382 made of a water-repellent nonwoven fabric is disposed on a part of the contact surface of the crotch portion 304 with respect to the skin. The cell forming sheet 382 forms a cell structure that functions as a ventilation pipe and a cushion in the vicinity of the leg opening of the diaper.

The " contact surface per skin " means a surface that is in direct contact with the skin of the wearer when wearing the disposable diaper, that is, the innermost surface of the disposable diaper. As the " water-repellent nonwoven fabric ", materials such as the side sheets described later can be used. By using the water repellent nonwoven fabric, leakage of the excretion along the cell-forming sheet is less likely to occur.

The " part " means that the cell-forming sheet may not be disposed on all of the contact surfaces of the portion where the stretchable portion is formed. The location of the cell-forming sheet is not particularly limited.

However, in the first embodiment, as shown in Fig. 1D, a cell-forming sheet (a sheet) is formed in the vicinity of the waist edge (the waist edge 65c of the backing sheet 65 in this embodiment) of the post- And the cell forming sheet 82 is disposed in the vicinity of the waist edge of the front flap 2 (in this embodiment, the waist edge 62c of the front external body 62) . 13A, the cell-forming sheet 382 is disposed in the left and right side edge portions of the crotch portion 4 (in the present embodiment, in the vicinity of the side edges 370a and 370b of the diaper body 370) . In either case, it is preferable to arrange to cover at least 60% of the side edge of the waist edge or the crotch covering portion, and more preferably to cover the entire edge of the waist edge or the crotch covering portion.

15A, at least the side edges 370a and 370b of the diaper body 370 are disposed on the left and right side edge portions (in the present embodiment, the side edges 370a and 370b) of the crotch covering portion 304 . In this case, as shown in Fig. 15A, it is preferable to arrange to cover at least 60% of the entire length of the diaper body 370 (the length between the waist edge rim 370c and 370d).

The basis weight of the cell-forming sheet is preferably 10 to 50 g / m 2. If it is less than 10 g / m 2, the volume of the sheet is too small, and there is a possibility that the adhesive for fixing the stretchable material penetrates and seeps through the sheet. On the other hand, if it is more than 50 g / m 2, 1) the rigidity of the sheet is too high so that it is difficult to bend in conjunction with the shrinkage of the stretchable material and the cell structure becomes difficult to form; 2) the sheet is too bulky, There is a concern that

The cell forming sheet 282 shown in Figs. 12B and 12C, the cell forming sheet 382 shown in Figs. 13A and 13B, and the cell forming sheet 382 shown in Fig. 18B are configured as members independent of other members . However, the cell forming sheet need not be constituted as an independent member. For example, in the disposable diaper 1A shown in Fig. 1D, a folded portion 88 is formed in a part of the outer sheet 66 constituting the stretchable nonwoven fabric (stretchable and contractible portion 80) Forming sheet 82 as shown in Fig. 12C, it is also possible to adopt a configuration in which a portion of the nonwoven fabric sheet 32 constituting the three-dimensional gatherer 26 is folded and the folded portion is used as the cell forming sheet .

For example, in the disposable diaper 301C shown in Fig. 17C, a portion of the nonwoven fabric sheet 334 constituting the stretchable nonwoven fabric (extensible portion 381) is folded, and the folded portion is folded into the cell- .

In the disposable diaper 301D shown in Fig. 18A, part of the nonwoven fabric sheet 333 constituting the three-dimensional gatherer 327 is used as the cell forming sheet 383. In the disposable diaper 301e shown in Fig. 18B, part of the nonwoven fabric sheet 333 constituting the three-dimensional gatherers 326 and 327 is used as the cell forming sheet 383.

In the disposable diaper 301D shown in Fig. 18A and the disposable diaper 301E shown in Fig. 18B, the folded portions 378, 379, 378 and 379 are formed in the nonwoven fabric sheets 333 and 333 and the folded portions 378 and 379 378, 37) 9 constituting the stretchable and contractible portions 381, 381 are used as a nonwoven fabric sheet.

In the disposable diaper 201A shown in Figs. 12B and 12C, the cell-forming sheet 282 is disposed on the inner surface of the three-dimensional gatherer 26. Fig. In the case of using the disposable diaper 201A, as shown in Fig. 12F, the three-dimensional gatherer 26 is torn to the outside and is hit by the wearer's skin. Therefore, the cell-forming sheet 282 disposed on the inner surface of the three-dimensional gatherer 26 comes into contact with the wearer's skin, thereby exerting the effect of the present invention. In addition, one long dotted line in Fig. 12F represents the seat portion of the wearer.

The cell-forming sheet may be provided with a hole for communicating the internal space of the diaper with the cell formed by the cell-forming sheet. With this structure, in the first embodiment and the second embodiment, moisture is introduced into the cell via the hole in the inner space of the diaper, so that moisture on the contact surface per skin of the diaper is less likely to be condensed. In the second embodiment, moisture flows into the cell via the hole in the inner space of the diaper, and moisture is discharged to the outer space of the diaper via the cell.

The " hole " means an opening for communicating the internal space of the diaper with the cell, and the shape thereof is not particularly limited. For example, a shape such as a circle, an ellipse, a polygon (a triangle, a square, etc.) may be mentioned.

The term " hole " includes not only an element which is always open but also an element which can be opened and closed. For example, a slit having a convex shape or a slit having a plurality of intersecting lines may be formed on the cell-forming sheet, so that a hole having a tongue piece functioning as a side can be formed. With the above tongue piece, it is possible to pass the moisture while suppressing the infiltration of urine or body fluids into the cell.

The shape of the slit is not particularly limited. Examples of the " slit having a locus convex shape " include a) a slit having a curved portion (inverted U-shaped slit or the like) and b) a slit having a bent portion (inverted V-shaped slit or the like). Examples of the "intersecting plural lines of slits" include cross-shaped slits formed by crossing two slits, and star-shaped slits formed by crossing three slits.

It is preferable that the hole is formed in a portion of the cell-forming sheet where cells are formed (that is, a region between the junctions). Particularly, when the cell-forming sheet 82 is formed by the folded portion 88 like the disposable diaper 1A shown in Fig. 1D, or when the cell-forming sheet 383 is made of the same material as the disposable diaper 301C shown in Fig. It is preferable that a hole is formed in the vicinity of the tip end of the folded portion and that a portion of the end set of the portion folded back again from the hole is joined to the stretchable portion in the case of being formed by the folded portion of the nonwoven fabric sheet 334. [ This configuration is preferable because the hole is forcibly opened by the contraction of the stretchable and contractible portion.

In the above configuration, the forcibly opened hole becomes the end opening of the cell. Therefore, the moisture in the diaper inner space flows into the cell from the hole forcibly opened and passes through the cell, and immediately thereafter, the moisture of the portion of the folding line (in the example of Fig. 1D, the waist edge 62c, 65c, The upper rim of the three-dimensional gathers 327), and is discharged to the outer space of the diaper. Such a configuration is preferable in that moisture is easy to flow into the cell and moisture is easily discharged to the outside of the diaper, as compared with a structure in which a hole is formed only in the cell-forming sheet.

A plurality of holes may be formed in the cell-forming sheet. By forming a plurality of holes, ventilation is improved and moisture can be easily discharged to the outside of the diaper.

The specific number of "plural" is not particularly limited. And the opening area of the hole. When the hole area is 0.5 to 10 m 2, it is preferably 5 to 200 holes, more preferably 10 to 100 holes. 5 or more, it is possible to obtain an effect of improving ventilation. In addition, by setting the number to 200 or less, it is possible to effectively prevent urine and body fluids from flowing into the cell.

It is also one of the preferred forms to attach the drug to the cell-forming sheet. By attaching the medicament, it is possible to impart a medicinal effect based on the medicament to the cell-forming sheet in direct contact with the wearer's skin.

The type of medicament is not particularly limited. (Eucalyptus extract, etc.) having an urease inhibiting activity in addition to those having a moisturizing effect, a disinfecting agent, an antimicrobial agent (edetate acetic acid, benzalkonium chloride, etc.) Deodorant (various polyphenol compounds and the like), and the like.

[2-5] Cell:

In the disposable diaper of the present invention, as shown in Figs. 1D, 1F, 15D and 15F, bonding portions 84 and 384 for bonding the cell forming sheets 82 and 382 to the stretchable and contractible portions 80 and 380 are formed have. The joint portions 84 and 384 intermittently join the cell forming sheets 82 and 382 and the stretchable and contractible portions 80 and 380 toward the shrinking direction of the stretchable and contractible portion. The cells 84 and 384 extend between the layers of the cell forming sheets 82 and 382 and the stretchable and contractible portions 80 and 380 and extend in the direction intersecting the shrinking direction of the stretchable and contractible portions 80 and 380 86, and 386 are formed.

The distance between the joining portions 84 and 384 of the cell forming sheets 82 and 382 and the stretchable and contractible portions 80 and 380 can be narrowed following the contraction of the stretchable and contractible portions 80 and 380, 386 are formed. The cells 86 and 386 improve the ventilation and flexibility of the diaper. Further, in the case of the above structure, a precise joining technique such as joining the sheets in consideration of the position of the stretchable member as in the pants-type absorbent article described in Patent Documents 1 to 5 is unnecessary. Therefore, it can be easily produced.

In order to reliably form the cell, a structure in which the cell-forming sheet is bonded to a stretchable nonwoven fabric in a natural state (a state in which the stretching portion is not stretched) is loosened is preferable. That is, it is preferable that the distance between the joints in the natural state is longer than that of the stretchable nonwoven fabric. According to the above structure, it is difficult for the cell-forming sheet to prevent stretching of the stretchable and contractible portion. Further, the cell is reliably formed in a natural state.

The above structure can be formed, for example, by the following method. The stretchable nonwoven fabric having elasticity of the nonwoven fabric itself such as an elastomeric nonwoven fabric is in a natural state (a state in which tension is not applied) and a circular state. Therefore, when the stretchable and non-stretchable portion is formed by the stretchable nonwoven fabric, it is preferable to bond the cell-forming sheet in a state in which the stretchable nonwoven fabric is elongated beyond the original size.

In addition, the elastic nonwoven fabric in which the stretchable material in the stretched state is disposed between the layers of the plurality of nonwoven fabric sheets is in a state of being contracted from its original dimension in the natural state. Therefore, when the stretchable and non-stretchable portion is formed by the stretchable nonwoven fabric, it is preferable that the stretchable nonwoven fabric is stretched from the retracted state to join the cell forming sheet.

In the case of forming the stretchable and contractible portion by the stretchable nonwoven fabric in which the stretchable material in the stretched state is disposed between the layers of the plurality of nonwoven fabric sheets, the nonwoven fabric sheet serving as the constituent material of the stretchable nonwoven fabric and the cell forming sheet are laminated and bonded, Is formed. Thereafter, the stretchable nonwoven fabric is preferably formed by disposing and stretching a stretchable material in a stretched state between layers of the nonwoven fabric sheet bonded with the cell forming sheet and another nonwoven fabric sheet.

In the above method, the cell-forming sheet is bonded to a nonwoven fabric sheet to which a contracting force does not act. Therefore, the cell-forming sheet can be easily bonded as compared with the case where the cell-forming sheet is bonded to the stretchable nonwoven fabric. When the cell-forming sheet is bonded to the stretchable nonwoven fabric, it is necessary to bond the stretchable nonwoven fabric in a stretched state. Therefore, the cell-forming sheet can not be bonded to a desired state, and there is a risk that the cell-forming sheet will be wrinkled or the apparatus for joining becomes complicated.

The joining of the stretchable and contractible portion and the cell-forming sheet is carried out by bonding the surface of the stretchable nonwoven fabric constituting the stretchable and contractible portion to the cell-forming sheet. That is, the extensible material or the stretchable film disposed between the layers of the nonwoven fabric sheet and the cell-forming sheet are not bonded directly.

The bonding between the stretchable nonwoven fabric and the cell forming sheet can be fixed by adhesion using an adhesive, or fusion bonding using heat or ultrasonic waves. As the adhesive, hot melt adhesives and other highly flexible adhesives can be used. As the welding method, a heat seal or the like can be mentioned.

&Quot; Intermittent " means that the joint portion is formed discontinuously or intermittently. In this joined state, the stretchable and contractible portion and the cell-forming sheet are in an integral state in the joining portion. Further, in the non-joined portion, the stretchable and contractible portion and the cell-forming sheet are not bound to each other, but are freely detachable. The term " intermittent " may be intermittent with respect to the contraction direction of the stretchable and contractible portion.

[2-5A] Cell structure of the first embodiment:

In the first embodiment, as shown in Figs. 1D and 1F, the cell 86 is a non-penetrating cell whose one end is opened and the other end is closed. Since one end of the cell 86 is opened and the other end thereof is closed, no other excretion leaks into the inner space of the cell 86.

In the first embodiment, the shape of the joined portion is not particularly limited as long as it extends in the cross direction intersecting the shrinking direction of the stretchable and contractible portion, and one end is opened and the other end is closed. However, in order to form a cell extending in the crossing direction intersecting with the contraction direction of the stretchable and contractible portion, the joining portion is formed intermittently with respect to the contraction direction of the stretchable and contractible portion.

As this form, for example, as in the joining portion 84 shown in Figs. 1F and 2A, the joining portion 84D shown in Fig. 7A, the joining portion 84E shown in Fig. 8A, and the joining portion 84 F shown in Fig. And a zigzag shape continuous in the shrinking direction of the portion 80 can be given. It is also possible to adopt a form of a broken line continuous in the shrinking direction of the stretchable and contractible portion 80, such as the joint portion 84A shown in Fig. 4A, the joint 84B shown in Fig. 5A, and the joint 84C shown in Fig. 6A .

In the first embodiment, the distance between the joints at the open end of the cell is preferably 2 to 50 mm, and particularly preferably 5 to 10 mm.

In the disposable diaper 1A shown in Fig. 1D, the folded portions 88 (outer side edges) of the outer sheets 63 and 66 serving as the cell forming sheet 82 are pressed against the pressing sheet 68 constituting the stretchable and contractible portion 80 (The joining portion 84). 2A is a schematic plan view schematically showing an enlarged form of a joint 84 of the disposable diaper 1A shown in Fig. 1B.

As shown in Fig. 2A, the abutment portion 84 is formed in a zigzag shape toward the body peripheral direction (left and right direction in the figure) of the diaper. That is, the joining portion 84 is formed intermittently toward the shrinking direction (the left-right direction in the figure) of the stretchable and contractible portion 80. The cells 86 are all formed in a triangular shape in plan view.

As a cell, an end portion (an end portion on the side of the waist edge 65c side) of the diaper closer to the outer space as shown in Figs. 2A and 2C is opened and the end portion farther from the outer space of the diaper is closed (Outward cell) and a cell 86 (inward cell) in which an end far from the outer space of the diaper is opened and the end near the outer space of the diaper is closed is formed as shown in Figs. 2A and 2B have.

In the example shown in Figs. 2A to 2C, a plurality of cells 86 are arranged in parallel in the shrinking direction of the stretchable and contractible portion 80. Fig. Therefore, moisture or the like easily flows toward the front and rear direction of the diaper, and the exhaust of moisture or the like from the inner space of the diaper can be promoted. In addition, it is easy to follow the diaper in a curved shape around the wearer's waist, and is excellent in fit and comfort.

In this cell row, the outward cell and the inward cell are alternately arranged. In this configuration, air in the outer space of the diaper enters the outward cell, and moisture in the inner space of the diaper enters the inward cell. Therefore, the air and the moisture are exchanged between the adjacent outward cell and the inward cell, and the exhaust of the moisture is promoted. In addition, in the example shown in Fig. 2A, the outward cell and the inward cell are alternately partitioned by the zigzag junction 84. In Fig.

The junctions 84 shown in FIG. 2A are formed in a continuous line shape. However, it may be formed as an aggregate of a plurality of dot-shaped joints. This form has the effect that it is difficult to feel the pain even if the abutment part, which tends to become tense, touches the skin. Further, in order for a plurality of dot-shaped joints to be identified as " aggregates ", the distance from the adjacent dot-shaped joints is required to be 5 mm or less. The shape of the dot-shaped junction may be circular.

The configurations shown in Figs. 3A and 3B are as follows: (1) a plurality of cells 86 are formed by joining portions 84 in a row of cells arranged in parallel in the shrinking direction of the stretchable and contractible portion 80; 2) in that the outward cell and the inward cell are alternately arranged in the cell column. Therefore, the effect resulting from this form is the same as that shown in Figs. 2A to 2C. The shapes shown in Figs. 3A and 3B are different from those shown in Figs. 2A to 2C in that slits 89 are formed in the vicinity of the waist edge frame 65c of the cell forming sheet 82 . By forming the slit 89, it is possible to expose the opening of the outward cell on the side of the waist edge 65c, thereby improving ventilation and dehumidification.

4A to 4C show a case where the nonwoven fabric sheet 69 is used as the cell forming sheet 82A and 1) a plurality of cells 86A are joined by the joining portion 84A to the shrinkage of the stretchable and contractible portion 80 And 2) cell rows are common to those shown in Figs. 2A to 2C in that outward and inward cells are alternately arranged in the cell column. Therefore, the effect resulting from this form is the same as that shown in Figs. 2A to 2C. 4A to 4C, the abutting portion 84A is formed in the shape of a broken line toward the body peripheral direction of the diaper.

5A and 5B show a case where the nonwoven fabric sheet 69 is used as the cell forming sheet 82A and 1) a plurality of cells 86B are joined by the joining portion 84B toward the contraction direction of the stretchable and contractible portion 80 Are common to those shown in Figs. 2A to 2C in that cell rows arranged in parallel are formed. Therefore, the effect resulting from this form is the same as that shown in Figs. 2A to 2C.

5A and 5B, since a plurality of stages (two stages in this embodiment) of cell rows are arranged toward the intersecting direction intersecting the contraction direction of the stretchable and contractible portion 80, 2C. ≪ / RTI > The outermost cells are arranged in parallel in the cell column (cell column above the figure) close to the west end edge 65c, and the cell columns (the cell column in the lower part of the figure) farther from the west end edge 65c, It is deployed as enemy. Compared with the form shown in Figs. 2A to 2C, this type of cell is divided into multiple stages, so that the cell tends to follow the action of the wearer and is likely to deform. That is, it is preferable from the viewpoint of flexibility and fitability. 5A and 5B are formed in a dashed line shape in which the joint portion 84B is arranged so that the U-shape is continuous toward the body peripheral direction of the diaper.

6A to 6C show that the folded portion 88 of the outer sheet 66 and the nonwoven fabric sheet 67 as the cell forming sheet 82C are used as the cell forming sheet 82B and 1) (Two-step in this embodiment) cell rows are arranged toward the intersecting direction intersecting the shrinking direction of the diaper body 80, and 2) the joint portion 84C is U-shaped toward the body peripheral direction of the diaper 5A and 5B in that they are formed in a dashed line arranged so as to be continuous. Therefore, the effect resulting from this form is the same as that shown in Figs. 5A and 5B. However, in the configurations shown in Figs. 6A to 6C, inward cells are arranged in parallel to all cell rows.

6A to 6C, in the contracting direction of the stretchable and contractible portion 80 out of the joining portions 84C forming the cell 86C in one cell row (the cell row at the bottom of the figure) (The upper and lower directions in the figure) intersecting with the one cell array and the cell 86C in the cell array adjacent to the one cell array (cell row above the cell array) Are arranged in a line so as not to be arranged in a straight line.

In other words, an extension of a portion extending in the intersecting direction (the up-and-down direction) of the joining portion 84C for partitioning the cell 86C in one cell row (the cell row below the drawing) A plurality of cell rows are arranged so as to pass through the cell 86C in the adjacent cell row.

When the cell 86C rises due to the contraction of the stretchable and contractible portion 80, the portion of the abutment portion 84C becomes a valley, and there is a risk that the excreta may leak on the valley portion. However, in the configurations shown in Figs. 6A to 6C, the positions of the joint portions 84C are shifted so that the valleys of the cell rows formed at the multi-stages are not continuous. Therefore, there is an advantage that the excrement is difficult to catch on the valley part. Since the inward cells are arranged in parallel to the cell row above the figure, the inward cells in the cell row above the figure can be caught by the excreted matter attached to the junction 84C of the cell row at the lower side of the figure, Is excellent.

7A to 7C show a configuration in which 1) the joint portion 84D is formed in a zigzag shape with the nonwoven fabric sheet 67 serving as the cell forming sheet 82C and facing the body peripheral direction of the diaper (2) cell rows in which a plurality of cells 86D are arranged in parallel with each other in the direction of contraction of the stretchable and contractible portion 80 is formed; (3) cell rows are arranged such that the outward and inward cells are alternately arranged , It is common to the shapes shown in Figs. 2A to 2C. Therefore, the effect resulting from this form is the same as that shown in Figs. 2A to 2C.

7A to 7C, since a plurality of stages (two stages in this embodiment) of cell rows are arranged toward the intersecting direction intersecting the contraction direction of the stretchable and contractible portion 80, a and Fig. 5B. Therefore, the effect resulting from this form is the same as that shown in Figs. 5A and 5B.

In the embodiment shown in Figs. 7A to 7C, two cell-forming sheets 82C each corresponding to each cell row are provided. That is, the folded portion 88 of the outer sheet 66 is not used as the cell-forming sheet. By having the independent cell-forming sheet 82C, all the cells 86D are exposed toward the inner space of the diaper, the waist edge 65c.

8A to 8C show a configuration in which 1) the joint portion 84E is formed in a zigzag shape with the nonwoven fabric sheet 67 serving as the cell forming sheet 82C facing the body peripheral direction of the diaper (left and right direction in the drawing) A cell array in which a plurality of cells 86E are arranged in parallel to each other in a shrinking direction of the stretchable and contractible portion 80 is formed; and 3) the cell rows are arranged such that the outward cells and the inward cells are alternately arranged 4) a plurality of cells (two cells in this embodiment) are arranged in the direction of intersection with the contraction direction of the stretchable and contractible portion 80, 5) the cells corresponding to each cell column Forming sheets 82A and 82B, which are common to the shapes shown in Figs. 7A to 7C. Therefore, the effect resulting from this form is the same as that shown in Figs. 7A to 7C.

8A to 8C, in the contracting direction of the stretchable and contractible portion 80 of the joining portion 84E for partitioning the cell 86E in one cell row (the cell row at the bottom of the drawing) (The upper and lower directions in the drawing) intersecting with the one cell array and the cell array 86E in the cell array adjacent to the one cell array (cell row above the cell array) The plurality of cell rows are arranged so that the portions extending in the cross direction are not arranged in a straight line.

In other words, an extension of a portion extending in the intersecting direction (vertical direction in the drawing) among the joining portions 84E for partitioning the cell 86E in one cell row (cell row at the bottom of the drawing) A plurality of cell rows are arranged so as to pass through the cell 86E in the adjacent cell row. Therefore, the same effects as those shown in Figs. 6A to 6C are obtained.

The configuration shown in Fig. 9 is a configuration in which the cell row is increased from the second stage to the third stage in the form shown in Figs. 8A to 8C. In this embodiment, three independent nonwoven fabric sheets 71 corresponding to the respective cell rows are used as the cell forming sheet 82D. And a plurality of cells 86F are formed by joining portions 84F formed in a staggered shape toward the body peripheral direction (left and right direction in the figure) of the diaper. This configuration has the same effect as the configuration of Figs. 8A to 8C. By forming the cell columns in three tiers, the flexibility and fit performance are further improved as compared with those shown in Figs. 8A to 8C.

The shape shown in FIG. 10A or FIG. 10B is different from the shape of the cell forming sheets 82E and 82F only in the shapes shown in FIGS. 8A to 8C. 10A or 10B, the cell opening end side of the nonwoven fabric sheets 73 and 75 is formed as a multi-layer structure as the cell forming sheets 82E and 82F. By using the multi-layer structure, it is possible to strengthen the waist of the cell forming sheets 82E and 82F. Therefore, even if the cell 86E is compressed by the body pressure, it is difficult for the cell opening to collapse, and the cell 86E can easily be held in the open state.

In the embodiment shown in Figs. 10A and 10B, the end portions of the cell forming sheets 82E and 82F on the cell non-opening end side also have a multi-layer structure. With such a structure, the cell-forming sheets 82E and 82F are likely to rise from the cell non-opening end side end side, and it becomes easy to keep the cell 86E in the open state.

The method of making the cell opening end side end portion of the multilayer structure is not particularly limited. As shown in Fig. 10A, the end portion of the cell forming sheet 82E may be folded downward to form a multi-layer structure, or the cell forming sheet 82F may be folded upward to form a multi-layer structure as shown in Fig. 10B. Alternatively, a separate sheet may be laminated on the cell-forming sheet to form a multi-layer structure.

[2-5B] Cell structure of the second embodiment:

In the second embodiment, as shown in Figs. 15D and 15E, a joining portion 384 for intermittently joining the cell-forming sheet 382 and the stretchable and contractible portion 380 in the direction along the side edge of the crotch- A cell 386 extending in the crossing direction intersecting the side edge of the crotch portion is formed between the cell forming sheet 382 and the stretchable and contractible portion 380 by the joining portion 384.

With this structure, the distance between the joining portions 384 of the cell-forming sheet 382 is narrowed following the contraction of the stretchable and contractible portion 380, and the inner space of the diaper is communicated with the outer space at the side edge portion of the crotch- A cell 386 is formed. This cell 386 improves the ventilation and flexibility of the diaper. Further, in the case of the above structure, a precise joining technique such as joining the sheets in consideration of the position of the stretchable member as in the pants-type absorbent article described in Patent Documents 1 to 5 is unnecessary. Therefore, it can be easily produced.

In the present invention, the gap (interval) between one joint portion and another joint portion in the cell-forming sheet or the stretchable and contractible portion contracts to form a cell. Therefore, the distance between the joints is preferably 2 to 50 mm, preferably 5 to 10 mm, in the direction along the side edge of the crotch portion.

The shape of the joining portion in the direction orthogonal to the shrinking direction of the stretchable and contractible portion is not particularly limited. However, it is preferable that the joining portion is formed continuously in a direction orthogonal to the shrinking direction of the stretchable and contractible portion. This configuration can form an effective cell facing the direction orthogonal to the shrinkage direction, and is also excellent in touch. For example, there can be mentioned a joining portion continuously formed toward a direction perpendicular to the shrinking direction of the stretchable and contractible portion and intermittently formed at regular intervals with respect to the shrinking direction of the stretchable and contractible portion.

In the disposable diaper 301B shown in Fig. 15B, the cell forming sheet 382 is bonded to the nonwoven fabric sheet 332 (side sheet 319) constituting the stretchable and contractible portion 380 (stretchable nonwoven fabric) 15F is an enlarged plan view schematically showing the shape of the joining portion 384 of the disposable diaper 301B shown in Figs. 15A and 15B. The cell-forming sheet 382 is peeled from the disposable diaper 301B Fig. 2 is a plan view schematically showing one state.

As shown in Fig. 15F, the joining portion 384 is made up of a plurality of line-shaped joining portions 390 which face the peripheral direction of the body of the diaper (left and right direction in the figure). The line-shaped joint 390 is formed intermittently toward the side edge of the crotch portion (the side edge 370a of the diaper body 370). Each of the line-shaped joint portions 390 is formed as an aggregate in which a plurality of dot-shaped joint portions 392 are arranged in a line in the peripheral direction of the body of the diaper.

In the example shown in Fig. 15F, the linear joint portion 390 is oriented toward the body peripheral direction of the diaper. Therefore, compared with the case where the crotch portion is oriented in the direction along the side edge of the crotch covering portion, moisture or the like easily flows toward the front and back direction, and moisture or the like on the side edge of the crotch covering portion (side edge 370a of the diaper body) The exhaust can be promoted. In addition, it is easy to follow the diaper in a curved shape around the wearer's foot, and is excellent in fit and comfort.

In the present specification, the term " line shape " includes a shape that extends in the direction of the body periphery of the diaper in a broad manner, and includes shapes such as a band shape and a rectangle other than what is called a line shape. In order for a plurality of dot-shaped joints to be identified as an " aggregate ", the distance from adjacent dot-shaped joints is required to be 5 mm or less.

The shape shown in Fig. 16A is the same as the shape shown in Fig. 15F and the expansion / contraction portion, and the shape of the joint portion is different. The joint portion 384A is formed of a plurality of linear joint portions 390A directed toward the body peripheral direction of the diaper. The line-shaped joint 390A is intermittently formed in a direction along the side edge of the crotch portion (the side edge 370a of the diaper body). In addition, the line-shaped junction 390A is formed as an aggregate of circular-shaped dot-shaped junction 392A. Therefore, in addition to the effect of the shape shown in Fig. 15F, there is an effect that the joint 384A, which tends to become hard to touch, hardly causes pain even if it touches the skin.

The shape shown in Fig. 16B is the same as the shape shown in Fig. 15F and the expansion / contraction portion, and the shape of the joint portion is different. The joint portion 384B is composed of a plurality of linear-shaped joint portions 390B directed toward the body peripheral direction of the diaper. The line-shaped joint portion 390B is formed intermittently toward the side edge of the crotch portion (the side edge 370a of the diaper body).

Each of the line-shaped joint portions 390B is formed in such a manner that a plurality of dot-shaped joint portions 392B extend in the direction along the side edge (the side edge 370a of the diaper main body) of the crotch- m columns, and n &lt; m. This configuration is set to &quot; n <m &quot;, so that more dot-shaped joint portions 392B are arranged in the body peripheral direction in comparison with each line-shaped joint portion 390B in the direction along the side edge of the crotch- And is formed in a line shape having a longer body peripheral direction than a direction along the side edge of the crotch part.

In the example shown in Fig. 16B, the line-shaped junction portion 390B is formed as an aggregate of circular-shaped dot-shaped junction portions 392B, and the dot-shaped junction portions 392B are formed as an aggregate arranged in a matrix of two rows and five columns .

In the above-described embodiment, it is preferable that 1 to 30 line-shaped joints having a width of 1 to 4 mm and a length of 2 to 80 mm are formed in the longitudinal direction. It is preferable that each of the line-shaped junctions is an aggregate in which dot-shaped junctions each having an area of 1 to 4 m &lt; 2 &gt; are arranged in matrix form at intervals of 0.5 to 5 mm in the width direction and 0.5 to 3 mm in the longitudinal direction.

16A and 16B, an example in which the line-shaped junction is formed as an aggregate of dot-shaped junctions has been described. However, as shown in Fig. 16C, the abutment portion 384C is formed intermittently toward the direction along the side edge (the side edge 370a of the diaper body) of the crotch portion and continuously formed toward the body peripheral direction of the diaper (Line-shaped junction 390C). The shape shown in Fig. 16C is the same as the shape shown in Fig. 15F and the stretchable portion, and the shape of the joined portion is different.

Among them, the shape is formed so as to be orthogonal to the direction along the side edge (the side edge 370a of the diaper body) of the crotch covering portion like the joining portion 384C, and the shape in which the cells are arranged in the direction transverse to the side edge of the crotch covering portion desirable. In this configuration, the cell communicates with the inner space and the outer space of the diaper at the side edge of the crotch part. Therefore, sufficient ventilation can be achieved.

In the above embodiment, the abutment portion is formed in a line shape extending in the peripheral direction of the body of the diaper. Therefore, it is preferable that the exhaust of moisture or the like on the side edge of the crotch portion (the side edge 370a of the diaper body) side is promoted. In the case of forming a plurality of joint portions in the direction of the body periphery of the diaper from the same event, it is preferable that the plurality of joint portions are formed in line so as to be aligned on a straight line facing the body peripheral direction of the diaper (Figs. 16b). By forming the joining portion in this way, it becomes easy to form straight-line cells continuous in the direction of the body periphery of the diaper. Such a structure is preferable in that the formed cells are less likely to collapse and ventilation is facilitated.

In the disposable diaper of the present invention, it is also preferable that the cell-forming sheet and the stretchable and contractible portion are joined by a joint portion formed intermittently toward both the body peripheral direction of the diaper and the side edge of the crotch portion.

For example, a plurality of dot-shaped joint portions may be arranged in the form of a hillock. Also in this configuration, the cell-forming sheet is bent following the contraction of the stretchable and contractible portion, and a cell communicating with the inner space of the diaper and the outer space is formed. Therefore, the ventilating property and flexibility of the side edge portion of the crotch facing portion, which is an effect of the present invention, can be obtained.

[2-6] Application:

In the first embodiment, the portion for forming the cell structure is not particularly limited. In the second embodiment, the cell structure is formed at least on the right and left side edges of the crotch portion. For example, it can be applied to the following parts.

[2-6A] West stretch material Arrangement part:

The deployed portion of the waist stretchable member has a stretchable nonwoven fabric structure in which a stretched waist stretchable material is fixed between the layers of the nonwoven fabric sheet. In many cases, the waist stretchable material is arranged in accordance with the waist edge of the front waist region or the back waist region. Therefore, the cell structure can be formed in the waist stretchable material arranging portion by intermittently bonding the cell forming sheet to the waist stretchable material arranging portion.

For example, the disposable diaper 1A shown in Figs. 1B and 1D is configured such that the stretchable waist stretchable material 42 is fixed between the folded portions 88 of the outer sheets 63 and 66 and the pressing sheet 68 (Stretchable and contractible portion 80) of the stretchable nonwoven fabric. That is, the stretchable and contractible portion 80 has a waist edge (the waist edge 62c of the front sheath 62, the back sheath 65 of the front sheath 2, or the back sheath 6 in this embodiment) (The waist edge 65c in Fig. The cell forming sheet 82 is joined to the stretchable and contractible portion 80 (the joining portion 84).

[2-6B] Leg extension and contraction part:

The arranged portion of the leg stretchable member has a stretchable nonwoven fabric structure in which a stretched leg stretchable material is fixed between the layers of the nonwoven fabric sheet. And the leg stretchable material is often arranged along the side edge of the crotch portion. Therefore, by joining the cell forming sheet to the leg stretching and repositioning section, the cell structure can be formed in the leg stretching and repositioning section.

For example, the disposable diaper 301A shown in Fig. 13B includes a stretchable nonwoven fabric (stretchable and contractible portion 380) in which a stretchable elastic material 340 in a stretched state is fixed between the layers of the side sheets 319 and the cover sheet 324 Structure. That is, the stretchable and contractible portion 380 is disposed between the fixed end (lower end) of the three-dimensional gathers 326 and the side edge (the side edges 370a and 370b of the diaper body 370 in this embodiment) of the crotch- As shown in Fig. The cell-forming sheet 382 is joined to the stretchable and contractible portion 380 (the joining portion 384).

The disposable diaper 301B shown in Fig. 15B has a structure of a stretchable nonwoven fabric (stretchable and contractible portion 380) in which a stretchable elastic material 340 in a stretched state is fixed between the layers of the side sheets 319 and the cover sheet 324 . That is, the stretchable and contractible portion 380 is formed in a region between the fixed end (lower end) of the three-dimensional gatherer 326 and the side edge (the side edges 370a and 370b of the diaper body 370) of the crotch- . And the cell forming sheet 382 is intermittently joined to the stretchable and contractible portion 380 (the joining portion 384). The joint 384 shown in Fig. 17C, the joint 384 shown in Fig. 18A, and the joint 384 shown in Fig. 18B have the same shape.

The disposable diaper 1B shown in Fig. 19C has a structure of a stretchable nonwoven fabric (extensible portion 80) in which a stretchable stretchable material 38 in a stretched state is fixed between layers of nonwoven fabric sheets 32. Fig. That is, the stretchable and contractible portion 80 is formed in a region between the fixed end (lower end) of the three-dimensional gathers 26 and the side edge of the crotch covering portion 4 (side edge of the absorbent main body 14). And the cell forming sheet 82 is intermittently joined to the stretchable and contractible portion 80 (the joining portion 84).

[2-6C] Stereoscopic gathering elastic member Arrangement part:

The arrangement of the three-dimensional gathers has a stretchable nonwoven fabric structure in which a stretchable elastic material in a stretched state is fixed between the layers of the nonwoven fabric sheet. Further, the solid gathers are often formed in a direction along the side edge of the crotch portion. Therefore, by interposing the cell-forming sheet intermittently to the three-dimensional gathering / stretching material arranging unit, the cell structure can be formed in the three-dimensional gathering / stretching material arranging unit.

For example, in the disposable diaper 201A shown in Fig. 12C, a solid gathers 26 are formed by a part of the nonwoven fabric sheet 32. Fig. The stretchable nonwoven fabric (extensible portion 280) has a structure in which a stretchable elastic material 36 in a stretched state is fixed between the base portion of the nonwoven fabric sheet 32 and the folded portion. That is, the stretchable and contractible portion 280 is formed in a region between the fixed end (lower end) and the free end (upper end) of the solid gathers 26. The cell-forming sheet 282 is joined to the stretchable and contractible portion 280 (the joining portion 284).

In the disposable diaper 1B shown in Fig. 19C, a solid gathers 26 are formed by a part of the nonwoven fabric sheet 32. Fig. (Stretchable and contractible portion 81) in which a stretchable elastic material 36 in a stretched state is fixed between the base portion of the nonwoven fabric sheet 32 and the folded portion. That is, the stretchable and contractible portion 81 is formed in a region between the fixed end (lower end) and the free end (upper end) of the three-dimensional gatherer 26. And the cell forming sheet 82 is intermittently joined to the stretching and contracting portion 81 (the joining portion 84).

In the disposable diaper 301C shown in Fig. 17C, a three-dimensional gatherer 327 is formed by a part of the nonwoven fabric sheet 333. Fig. (Stretchable and contractible portion 381) in which a stretchable elastic material 337 in an elongated state is fixed between the nonwoven fabric sheet 333 and the nonwoven fabric sheet 334. That is, the stretchable and contractible portion 381 is formed in a region between the fixed end (lower end) and the free end (upper end) of the solid gathers 327. And the cell forming sheet 383 is intermittently joined to the stretchable and contractible portion 381 (the joining portion 385). The joining portion 385 shown in Fig. 18A and the joining portion 385 shown in Fig. 18B have the same shape.

In the disposable diaper 301C shown in Fig. 17C, the cell forming sheet 383 is bonded only to the three-dimensional gatherers 327, and the cell forming sheet is provided on the three-dimensional gatherers 326 It is not bonded. However, the cell-forming sheet may be bonded to the three-dimensional gatherer 326 (arrangement portion of the three-dimensional gathering elastic member 336).

[2-7] Manufacturing method of disposable diaper according to the first embodiment:

A method of manufacturing the disposable diaper according to the first embodiment will be described.

The disposable diaper 1A shown in Figs. 1A to 1E can be manufactured, for example, by the processes shown in Figs. 11A and 11B. Fig. 11A is a process diagram schematically showing a process of manufacturing the disposable diaper 1A shown in Figs. 1A to 1E. This figure shows only the portion corresponding to the vicinity of the waist edge in the posterior portion of one pants-type diaper in an enlarged manner due to the constructional situation. Fig. 11B is a schematic cross-sectional view schematically showing a cutting section obtained by cutting each step shown in Fig. 11A at the center in the width direction of the structural unit shown in Fig. 11A.

First, as shown in Figs. 11A and 11B (a), an outer sheet 66 composed of a cell forming sheet 82 and a pressing sheet 68 serving as a nonwoven fabric constituting the stretchable and contractible portion are prepared. An inner sheet 64 is adhered to the outer sheet 66 so that a part thereof (the exposed portion 78) is exposed in advance. This bonding is performed by a hot melt adhesive or the like.

Subsequently, as shown in Figs. 11A and 11B (b), the pressing sheet 68 is joined to the folded portion 88 of the outer sheet 66 to form the joining portion 84. Fig. At this time, the outer sheet 66 is joined so that the pressing sheet 68 exceeds the outer edge of the outer sheet 66. In the illustrated example, the joint 84 is formed by a heat seal. The joining portion 84 is formed in a zigzag shape continuous in the circumferential direction of the diaper body (left and right direction in the drawing).

As shown in Figs. 11A and 11B (c), the waist stretchable material 42 is stretched and bonded to the exposed portion 78 of the outer sheet 66. In addition, an absorbent main body 14 is laid. The exposed portion 78 and the pressing sheet 68, which sandwich the waist stretchable material 42, adhere on the continuous surface.

1) The hot-melt adhesive is continuously applied to the exposed portion 78 or the pressing sheet 68 of the outer sheet 66 constituting the stretchable and contractible portion 80, (2) a method in which a hot melt adhesive is applied or sprayed directly on the waist stretchable material 42 and the waist stretchable material 42 is adhered in a stretched state 3) The waist stretchable material 42 is placed in the stretched state on the upper portion of the exposed portion 78 or the pressing sheet 68 and the hot melt adhesive is sprayed in this state to expose the exposed portion 78 or the pressing sheet 68 A method in which a hot melt adhesive is adhered to both of the waist stretchable material 68 and the waist stretchable material 42 and the waist stretchable material 42 is stretched on the surface of the exposed portion 78 or the press sheet 68 A hot melt adhesive agent is sprayed or continuously applied in this state, and the exposed portion 78 is hot- It may be carried out by a method of adhering by a hot melt adhesive adhered to both the press seat 68 and West new material 42.

The term &quot; continuous coating &quot; in this form includes not only a form in which an adhesive is entirely applied to the entire surface or sprayed over the entire surface, but also a form coated in a spiral form. In other words, the disposable diaper may have a configuration in which the joint is continuously formed toward the body peripheral direction of the disposable diaper. In any of the above-described methods 1) to 4), the joint portion is continuously formed toward the body peripheral direction of the disposable diaper. Therefore, a continuous space in the front-back direction of the disposable diaper is not formed between the exposed portion 78 and the pressing sheet 68 constituting the stretchable and contractible portion 80. On the other hand, the cell is formed between the pressing sheet 68 and the cell forming sheet 82 (the folded portion 88), and the ventilation and flexibility are improved by the cell.

Finally, as shown in Figs. 11A and 11B (d), the folded portion 88 of the outer sheet 66 and the pressing sheet 68 bonded to the outer sheet 66 are joined to the waist edge 65c Folded to the exposed portion 78 of the outer sheet 66, Thereafter, the pressing sheet 68 is fixed with a hot melt adhesive so as to cover a part of the absorbent main body 14 at a part of the pressing sheet 68. [ Thus, the stretchable and contractible portion 80 sandwiching the waist stretchable material 42 is formed between the layers of the nonwoven fabric sheet.

The series of steps described above can be carried out continuously by mechanical means. It is possible to continuously produce a plurality of disposable diapers by employing a method or apparatus such as continuously feeding a sheet material having a long length from a roller. For example, it is preferable to produce a long sheet member and a long stretchable member in the left-right direction of the drawing so that the structural units shown are repeatedly repeated in the left-right direction of the drawing.

[2-8] Manufacturing method of disposable diaper according to the second embodiment:

The disposable diaper according to the second embodiment can be manufactured by, for example, interposing the cell-forming sheet intermittently to a member constituting the contact surface per skin of the crotch part. In other parts, the disposable diaper can be manufactured in accordance with a manufacturing method of a general disposable diaper. Hereinafter, an example in which the disposable diaper 301B shown in Figs. 15A to 15E is manufactured will be described.

[2-8A] Bonding of the cell-forming sheet:

(The side edge portion of the side on which the solid gathers 326 are formed) of the nonwoven fabric sheet 332 is folded so that the stretchable elastic material 336 in the elongated state is sandwiched between the base and the folded portion, And fixed with a melt adhesive or the like to form the solid gathers 326. [ Further, the cell-forming sheet 382 is joined to the other side edge portion of the nonwoven fabric sheet 332 (the side edge portion on the side on which the side sheet 319 is formed) to form the bonding portion 384. In the illustrated example, the joint portion 384 is formed by a heat seal. The joint portion 384 is formed intermittently toward the front and rear direction (vertical direction in the figure) of the diaper intermittently toward the body peripheral direction (left and right direction in the drawing) of the disposable diaper.

[2-8B] Formation of a top sheet composite:

The front side flap 372 and the back side flap 374 are attached to the other side edge portion of the nonwoven fabric sheet 332 intermittently joined with the cell forming sheet 382 by a hot melt adhesive or the like. At the side edge portion of the rear side flap 374, the adhesive tape 311 is bonded by a heat seal or the like. This structure is referred to as &quot; topsheet composite &quot;.

Formation of [2-8C] backsheet complex:

A structure is formed in which the cover sheet 320 is stuck to the central portion of the cover sheet 324 in the width direction by a hot melt adhesive or the like and the waist stretchable material 342 is stuck to the cover sheet 320 again. This structure is referred to as a &quot; backsheet composite &quot;.

Formation of [2-8D] Absorber Composite:

The absorber 322 is wrapped by upper and lower tissues not shown. This structure is referred to as &quot; absorber composite &quot;. The upper and lower tissues may be arranged in the same manner as the absorber 22, the upper tissue 54 and the lower tissue 56 shown in Figs. 19C and 19D, for example.

[2-8E] Preparation of disposable diapers:

The absorbent composite is disposed at the center in the width direction of the back sheet composite and the stretchable shrinkable member 340 in the stretched state is disposed on the widthwise side edge portion of the back sheet composite. At this time, a hot melt adhesive for fixing the absorber composite and the absorber composite is coated.

The leg stretchable material 340 can be adhered to the cover sheet 320, the cover sheet 324 or the side sheet 319 by continuously applying a hot melt adhesive to the cover sheet 320, the cover sheet 324 or the side sheet 319, (2) a method in which a hot melt adhesive is applied or sprayed directly on the leg stretchable material 340 and the leg stretchable material 340 is adhered in a stretched state; (3) The cover sheet 324 and the leg stretchable material 340 are placed on the top of the cover sheet 324 in the state where the leg stretchable material 340 is stretched and the hot melt adhesive agent is sprayed in this state, 4) a method of sticking hot melt adhesive on both surfaces of the cover sheet 320 and the cover sheet 324; and 4) a method of arranging the leg stretching members 340 in a stretched state on the surface of the cover sheet 320 and the cover sheet 324, The cover sheet 320, the cover sheet 324 and the leg stretchable member 34 0) by adhering a hot-melt adhesive to both sides. With this method, the cover sheet 320, the cover sheet 324 and the side sheet 319, which sandwich the leg stretchable member 340, are bonded on the continuous surface.

The term &quot; continuous coating &quot; in this form includes not only the entire surface of the nonwoven fabric sheet or the entire surface thereof, but also a spiral coating form. In any of the above methods (1) to (4), the joint is continuously formed in the direction along the side edge of the crotch portion. Therefore, no continuous cells facing the body peripheral direction of the diaper are formed between the cover sheet 320, the cover sheet 324, and the side sheet 319 constituting the stretchable and contractible portion 380. On the other hand, the cell is formed between the side sheet 319 and the cell forming sheet 382.

The topsheet composite is applied to the backsheet composite on which the absorbent composite and the leg stretchable material 340 are disposed. Thus, the absorber composite and the leg stretching member 340 are fixed between the layers of the top sheet composite and the back sheet composite. In this manner, the disposable diaper 301B can be manufactured.

Further, in the first and second embodiments, the bonding method of 1) described above is carried out by a method such as a slit coater (sim coater), a curtain spray, a spiral spray, an omega coat, The bonding method of the above 3) and 4) is carried out by a method such as comb gun, omega coating, sure wrap or the like by a method such as omega coat, Summit or the like can do. The omega coat is, for example, an omega nozzle head (manufactured by ITW Dynatech Co., Ltd.). The summit is carried out by using a summit nozzle (manufactured by Node Sons) and a Sure wrap by using a Sureaw nozzle can do.

[3] Components of disposable diapers:

The disposable diaper of the present invention has at least the absorber 22, 322, such as the disposable diaper 1A shown in Figs. 1C and 1D, and the disposable diaper 301B shown in Fig. 15B. Normally, in addition to the absorbers 22 and 322, top sheets 18 and 318, back sheets 20 and 320, and the like are provided as constituent members. Further, depending on the purpose, other constituent members such as a three-dimensional gathers and various elastic members may be provided.

[3-1] Absorber:

The &quot; absorber &quot; is a structure composed of an absorbent material. Absorbing urine and the like of the wearer and holding it. Examples of the water absorbent material include a flocked pulp superabsorbent polymer (hereinafter referred to as SAP) and a hydrophilic sheet. As the flock pulp, it is preferable to use, for example, wood pulp or non-wood pulp fibrillated in the form of surface. The SAP is preferably sodium polyacrylate, and the hydrophilic sheet is preferably a tissue, absorbent paper or hydrophilic nonwoven fabric.

As the &quot; absorbent body &quot;, it is preferable to use one or two or more absorbent materials molded into a mat form. The mat may be a single layer or a multiple layer. Among them, 10 to 500 parts by mass of SAP is preferably used in combination with 100 parts by mass of the flock pulp. At this time, the SAP may be mixed in the flock pulp mat or may be used as a layer between the layers of the flock pulp.

Further, in order to prevent the SAP from coming off and to give shape stability, it is preferable that the entire absorbent body is covered with the hydrophilic sheet. As shown in Figs. 1C and 1D, the absorbent body 22 is covered with the topsheet 54 and the bottomsheet 56 which are hydrophilic sheets. The absorber 322 shown in Figs. 13B and 15B has the same structure. That is, the entire absorbent body 322 is covered by the non-illustrated topsheet and the bottom tissue.

The &quot; absorber &quot; may be formed into a desired shape such as a spherical shape, an hourglass shape or the like depending on the purpose. For example, the absorber 22 shown in Figs. 1C and 1D and the absorber 322 shown in Fig. 15B are examples using a spherical absorber. The "absorbent body" is generally covered with the topsheets 18, 318 on the front side thereof, like the absorbent body 22 shown in FIGS. 1C and 1D and the absorbent body 322 shown in FIG. 15B, And the back side is covered with the back sheet (20, 320). That is, the absorbers 22, 322 are generally disposed between the topsheet 18, 318 and the backsheet 20, 3200.

[3-2] Top sheet:

The &quot; topsheet &quot; is a sheet disposed so as to cover the surface of the absorbent body (the face on the side facing the wearer's skin when the diaper is attached). Permeable material, at least a part (all or a part) of the liquid permeable material is constituted by the liquid-permeable material.

Examples of the liquid-permeable material include a woven fabric, a nonwoven fabric, and a porous film. Among them, it is preferable to use a nonwoven fabric made of a thermoplastic resin such as polypropylene, polyethylene, polyester, aliphatic polyamide or the like, to which hydrophilization treatment is applied.

As the nonwoven fabric, a nonwoven fabric manufactured according to a manufacturing method such as air through (card hot air), card embossing, or the like can be suitably used. The hydrophilizing treatment can be performed by applying, spraying, or impregnating the surface active agent to the raw surface of the nonwoven fabric.

At least a part of the top sheet is made of a liquid permeable material. The position is not particularly limited. However, it is preferable that a portion overlapping the arrangement position of the absorbent body in the crotch-containing portion in plan view is made of a liquid-permeable material.

Further, in the disposable diaper of the present invention, not all of the surfaces of the wearer's skin facing the skin are covered by the topsheet. For example, as shown in Figs. 13A to 13C and Figs. 15A to 15C, in the case of the tape-type disposable diaper, a topsheet 318 made of a liquid permeable material is disposed only in the center portion in the body peripheral direction of the diaper . At this time, in many cases, a side sheet 319 made of a ventilation / water repellent material is disposed on the peripheral edge of the diaper on the body peripheral direction side. As the ventilation and water repellent material, it is preferable to use a nonwoven fabric sheet obtained by a method such as card embossing, spunbonding or the like. Especially, it is preferable to use a nonwoven fabric sheet such as SMS or SMMS having high water resistance.

[3-3] Back sheet:

The back sheet is a sheet disposed so as to cover the back surface of the absorber (the surface on the side facing the skin of the wearer when the diaper is attached). The backsheet is made of a liquid-pervious material to prevent the urine of the wearer from leaking to the outside of the diaper.

The arrangement position of the back sheet is not particularly limited. It is preferable that the back sheet is arranged to cover at least the arrangement position of the absorber from the viewpoint of preventing leakage of urine absorbed by the absorber.

As the liquid-pervious material, for example, a liquid-pervious film made of a resin such as polyethylene may, for example, be mentioned. Among them, it is preferable to use a microporous polyethylene film. This microporous polyethylene film is a film formed with a number of fine holes of 0.1 to several 탆 and is permeable to water but has moisture permeability. Therefore, it is possible to prevent the inner space of the diaper from being clogged while ensuring the leakproof property.

In the tape-type disposable diaper, the cover sheet 324 is often attached to the outer surface side of the cover sheet 320 as shown in Figs. 13B to 13D and Figs. 15B to 15C. The cover sheet 324 is used to reinforce the cover sheet 320 to make the cover sheet 320 feel good.

Examples of the material constituting the cover sheet include woven fabric, nonwoven fabric, and the like. Among them, it is preferable to use a dry nonwoven fabric or a wet nonwoven fabric made of a thermoplastic resin such as polyethylene, polypropylene, or polyester.

[3-4] Stereoscopic gathering:

The &quot; three-dimensional gathers &quot; is a three-dimensionally standing wall which is disposed on the contact surface per skin of the diaper. And is used for the purpose of preventing the side slippage of the slurry by matching with the leg elastic material by abutting against the skin of the wearer. A structure in which a stretchable elastic stretch material 36 in an elongated state is sandwiched and fixed between layers of a nonwoven fabric sheet 32 constituted by a nonwoven fabric sheet 32 is used as in the case of the solid garter 26 shown in Figs. 1C and 19C There are many. With this structure, the steric gathers 26 rise in a three-dimensional manner due to the contracting force of the elastic gathering / expanding member 36.

As shown in Fig. 1B, Fig. 1C, Fig. 19B and Fig. 19C, the three-dimensional gathers 26 are often disposed on both sides of the absorber 22. However, two or more left and right solid gathers may be disposed on both sides of the absorber. For example, a pair of three-dimensional gathers, which are disposed in contact with the crotch part of the wearer to prevent leakage of the side surface, are disposed inside the diaper body in the direction of the body periphery, and are in contact with the wearer's legs to prevent sideways leakage. (Sometimes referred to as &quot; three-dimensional leg gathers &quot;) may be disposed outside the diaper around the body of the diaper.

The material of the nonwoven fabric sheet is not particularly limited. However, like the side sheet, a nonwoven fabric sheet made of a ventilation / water repellent material can be suitably used.

The nonwoven fabric sheet may be formed as a three-dimensional gathers only, or may be formed of other members of the three-dimensional gathers and the diaper. In the case of the pull-on type disposable diaper, as shown in Figs. 1C and 19C, the nonwoven fabric sheet 32 forming the three-dimensional gathers is used to attach the absorbent body 14 to the absorbent body 14, Dimensional gathers 26 in many cases. On the other hand, in the case of the tape-type disposable diaper, as shown in Figs. 13A and 13B and Figs. 15A and 15B, the three-dimensional gathers 326 and the side sheets 319 are constituted by the nonwoven fabric sheet 332 made of water- In many cases.

[3-5] Absorbent Body:

The &quot; absorbent body &quot; is an absorbent pad containing an absorbent body. The absorbent main body is integrated with an external body to be described later to form a pull-on disposable diaper. The "absorbent pad" refers to a pad-like member in which an absorbent body, a top sheet, and a back sheet are integrally formed.

The topsheet 18 covering the surface of the absorbent body 22 and the backsheet 18 covering the backsides of the absorbent body 22 as in the absorbent main body 14 shown in Figs. 1D and 1D, 19C and 19D, A structure in which the absorbent body 22 is sandwiched between the top sheet 18 and the back sheet 20 by bonding the absorbent body 20 to the periphery of the absorbent body 22. The absorbent main body 14 shown in Figs. 12B to 12D, 20A and 20B has the same structure as the absorbent main body 14 shown in Figs. 1A to 1E.

[3-6] External body:

The &quot; outer body &quot; is a structure that covers the body of the wearer. The &quot; outer body &quot; refers to a pants type, which is integrally formed with the absorbent main body, or formed with one waist opening portion and a pair of leg opening portions.

The external body 16 shown in Figs. 1B and 19B is provided with a front exterior body 62 and a back exterior body 65 which surround the body of the wearer. And a pants type integrally formed with the absorbent main body 14 and formed with one waist opening 10 and a pair of leg openings 12. Fig. The external body 216 shown in Figs. 12A and 20A includes a front body portion 202, a crotch portion 204 and a rear portion 206 integrally formed with the external body 216, A wedge opening 210 and a pair of leg openings 212 are formed.

It is possible to adopt a configuration in which an engageable fastener member is provided instead of the joint portions 7 and 8 (joint portions 207 and 208) with respect to the external bodies 16 and 216 and the fastener members are engaged with each other, And the fastener members are previously engaged with each other to show the pants type are also included in the &quot; outer body &quot;. The fastener member may be, for example, a mechanical fastener.

The material of the outer body is not particularly limited. However, it is preferable that the diaper is made of a material having excellent ventilation so as to prevent the inner space of the diaper from being clogged. Examples of the material include nonwoven fabrics made of polyethylene, polypropylene, polyester, and other synthetic fibers.

In many cases, the outer body is composed of two or more nonwoven fabrics joined together. For example, the external body 16 shown in Fig. 1D and Fig. 19D is formed by laminating two or more nonwoven fabrics (inner sheets 61 and 64, outer sheets 63 and 66, and pressing sheet 68) . The outer body 216 shown in Figs. 12D and 20C is also constituted by a laminate in which two or more nonwoven fabrics (an inner sheet 215, an outer sheet 217, and a pressing sheet 268) are adhered. Normally, various extensible materials in the stretched state are fixed between the two or more nonwoven fabric layers.

[3-7] Diaper Body:

A disposable diaper of a tape type often does not employ a two-piece structure of an absorbent main body and an external body. In a tape-type disposable diaper, a structure in which an absorber and various sheets covering the absorber are integrally formed is referred to as a &quot; diaper body &quot;. The &quot; diaper body &quot; is a member in which an absorbent body is contained between layers of various sheets, and exhibits an absorbing and holding function, which is an essential function of the diaper. Further, the members (side flaps, adhesive tapes, etc., which are not separated from the side sheets) that do not absorb the absorbent body and exhibit the absorbing and holding function are not constituent members of the &quot; diaper body &quot;.

For example, the disposable diaper 301A shown in Figs. 13A and 13B includes a top sheet 318 covering the absorbent body 322 and the absorbent body 322, 319, a cover sheet 320 and a cover sheet 324 are integrally formed. In the disposable diaper 301A, the adhesive tape 311, the front side flap 372 and the back side flap 374 do not constitute the diaper body 370. [

[3-8] Various stretch materials:

In the disposable diaper of the present invention, it is preferable to arrange stretchable members such as a waist stretchable member, a leg stretchable member, and a dummy stretchable member. As described above, a leg stretchable material or the like can also be used as the stretchable material constituting the &quot; stretchable and contractible portion &quot; and the &quot; stretchable nonwoven fabric &quot;

[3-8a] West stretch material:

The waist stretchable material is a stretchable material disposed on the waisted portion. West gathering is formed at the waist-shaped portion by the waist stretchable material.

The waist stretchable material is preferably arranged along the waist edge of the diaper. &Quot; thus &quot; means generally parallel to the reference portion. In other words, it does not have to be parallel in strict sense. The waist stretchable material 242 shown in Figs. 12A, 12D, 12E, and 20C has a waist edge 202c, a waist edge 206c of the waist portion 206, And are arranged in parallel.

In the case of the pull-on disposable diaper, as shown in Figs. 12A, 12D, 12E, and 20C, a plurality of line stretchable members are often used as the waist elastic members 242. [ In many cases, the waist stretchable material 242 is disposed in both the front portion 202 and the rear portion 206 along the waist edge 202c, 206c. The disposable diaper 1A shown in Figs. 1A, 1D and 1E, and the waist stretchable material 42 shown in Figs. 19A, 19D and 19E adopt the same configuration.

Further, in the case of the tape-type disposable diaper, as shown in Figs. 15A and 15C, one sheet-shaped stretchable material (stretchable foam or the like) is often used as the waist stretchable material 342. The waist stretchable material may be disposed either in the front portion 302 or the rear portion 306 along the waist edge 370c or 370d as shown in Figs. 15A and 15C, But may be disposed only in the posterior portion according to the edge.

[3-8b] Leg extension material:

The leg stretchable material is an elastic material disposed in the crotch part. Leg gathers are formed on the crotch covering portion by the leg stretchable material.

In the case of the pull-on type disposable diaper, as shown in Figs. 12A, 12B, 12E, and 20A, a plurality of line stretchable members are often used as the leg stretchable member 240. Fig. In many cases, the leg elastic member 240 is curvedly arranged along the outer edge of the leg opening portion 212 of the external body 216. 12E, it is preferable that the leg stretchable member 240 be arranged so as not to cross the center in the body peripheral direction of the crotch-containing portion 204. [ According to this configuration, the contraction force of the leg stretching member 240 hardly acts on the center of the crotch portion 204 in the direction of the body periphery. Therefore, the wrinkles of the absorber 22 are prevented, and the absorber 22 can easily fit into the crotch of the wearer.

The disposable diaper 1A shown in Figs. 1A, 1B, and 1E, the disposable diaper 1B shown in Figs. 19A, 19B and 19E is provided with a crotch portion 4, And the ashes 40 are linearly arranged. The leg stretchable member 40 is arranged so as to be in parallel with the waist edge frame 65c of the backing member 65. [ In this structure, the portion of the back outer member 65 located in the crotch portion 4 contracts as the contraction of the leg stretching member 40 and contracts toward the side edge of the absorbent main body 14. [ Accordingly, the portion deforms to a shape along the wearer's legs and improves fitability of the wearer's legs around the legs.

The disposable diaper 1A shown in Figs. 1A, 1B and 1E and the disposable diaper 1B shown in Figs. 19A, 19B and 19E are arranged on both side edges of the absorbent body 22 in the absorbent main body 14, The leg stretchable material 38 is linearly arranged. In this configuration, the leg stretchable members 38, 40 and the dummy stretchable members 44 of the front outer body 62 are integrated to improve fitability of the wearer's legs.

In addition, when the leg stretchable material 38 is arranged, both sides of the absorbent main body 14 tend to form in the absorbent body 22 when the diaper is worn. This configuration makes it easier for urine to collect in the widthwise center portion of the absorbent main body 14 (i.e., the portion where the absorbent body 22 is disposed) after urination. This can make it difficult for the urine to leak.

In the case of the tape-type disposable diaper, as shown in Figs. 13B and 13D and Figs. 15A, 15B and 15E, a plurality of line stretchable members are often used as the leg stretchable members 340. Fig. It is often the case that at least the crotch portion 304 is provided with a plurality of left and right linear stretchable members linearly arranged along both sides of the absorber 322.

[3-8c] Pile stretch material:

The dummy stretchable material is a stretchable material disposed on the dummy embossed portion. A dummy gathers are formed in the dummy embossed portion by the dummy stretchable material. And is a stretchable material which is disposed mainly in a pants-type disposable diaper.

In the case of the pull-on type disposable diaper, as shown in Figs. 12A, 12B, 12E and 20A, a plurality of line-shaped stretchable members are often used as the dummy stretchable member 244. In many cases, the dummy stretchable material 244 is disposed linearly along the waist edge edges 202c, 206c and in both the front portion 202 and the rear portion 206. [ It is preferable to arrange the dummy stretchable material 244 so as not to traverse the arrangement region of the absorber 22 as shown in Fig. 12E for the same reason as in the case of the leg stretchable material. The disposable diaper 1A shown in Figs. 1A, 1B, and 1E, and the dummy elastic member 44 of the disposable diaper 1B shown in Figs. 19A, 19B, and 19E also adopt the same configuration.

[3-8d] Construction of elastic material, others:

As the stretchable material, a flat rubber made of natural rubber, a thread rubber made of elastic yarn such as synthetic rubber (urethane rubber or the like), and the like can be suitably used. Also, a stretch net, an elastic film, a stretchable foam (foamed synthetic rubber, etc.), or the like may be used.

The stretchable material is preferably fixed in a stretched state of 120 to 400%, and is preferably fixed in a stretched state of 200 to 300%. With this range, a sufficient stretching force can be applied to the wearer without exerting an excessive coupling force. The stretchable material can be fixed by adhesion using an adhesive, fusion by heat, ultrasonic waves, or the like. As the adhesive, a hot melt adhesive or other adhesive having high fluidity can be used. As the welding method, a heat seal or the like can be mentioned.

The method of fixing the stretchable material is not particularly limited. However, a method of fixing an adhesive to at least one of the stretchable material and the nonwoven fabric sheet interposed therebetween by coating or spraying may be used. As a coating method, for example, a spiral coating can be cited.

In the case of the pull-on disposable diaper, the waist stretchable material, the leg stretchable material, and the dummy stretchable material can also be arranged to be sandwiched between layers of a plurality of sheets constituting the external body.

For example, in the disposable diaper 1A shown in Fig. 1D and the disposable diaper 1B shown in Fig. 19D, the waist stretchable material 42 is sandwiched between the layers of the press sheet 68 and the outer sheets 63, Respectively. The disposable diaper 201A shown in Fig. 12D fixes the waist stretchable material 242 so as to fit between the pressing sheet 268 and the outer sheet 217. Fig.

In the disposable diaper 1A shown in Fig. 1E and the disposable diaper 1B shown in Fig. 19e, the leg stretchable material 40 is inserted between the inner sheets 61, 64 and the outer sheets 63, And the dummy elastic member 44 are fixed. 12E, the leg stretchable material 240 and the dummy stretchable material 244 are fixed so as to be sandwiched between the inner sheet 215 and the outer sheet 217. In the disposable diaper 201A shown in Fig.

However, the leg stretchable material may be fixed by sandwiching it between the layers of a plurality of sheets constituting the absorbent main body. For example, the disposable diaper 1A shown in Fig. 1C and the disposable diaper 1B shown in Fig. 19C are arranged in such a manner that the interlayer spaces between the nonwoven fabric sheets 32, which stick to the absorbent main body 14, Or between the nonwoven fabric sheet 32 and the cover sheet 24, as shown in Fig.

Further, in the case of the tape-type disposable diaper, the waist stretchable material and the leg stretchable material can be arranged to be sandwiched between layers of a plurality of sheets constituting the diaper main body. For example, the waist stretchable material can be fixed so as to fit between the back sheet and the cover sheet.

The disposable diaper 301B shown in Fig. 15B has a configuration in which the leg stretchable member 331 is inserted between the layers of the side sheet 319 and the cover sheet 324 constituted by the nonwoven fabric sheet 332, And the ash 340 is fixed. However, the leg stretchable material may be fixed so as to fit between the layers of the top sheet and the cover sheet.

[3-9] Restraining tape:

The &quot; adhesive tape &quot; is a tape for fixing either the front and rear-covered portions to the other. Normally, as in the case of the fastening tape 311 shown in Figs. 13A and 13D and Figs. 15A and 15C, the left and right side edges (the side edges 374a and 374b of the back side flap) And extend to the outside in the circumferential direction.

The adhesive tape preferably has a fastening member. The kind of the fastening member is not particularly limited. However, it is preferable to use a mechanical fastener (a surface type fastener). A mechanical fastener is preferred because it has high fastening force and hardly deteriorates holding force even if it is detached a number of times. For example, as shown in Figs. 13A and 13D and Figs. 15A and 15C, a hook member 348 of a mechanical fastener is laid near the front end of the base material 350 constituting the fastening tape 311. In many cases, a front patch 313 (front patch) made of a loop material 346 of a mechanical fastener is laid on the front flap 302 shown in Figs. 13D and 15C.

The number of the adhesive tapes is not particularly limited. However, a suitable number of adhesive tapes may be laid out in conformity with the size of the body of the wearer (specifically, around the waist, around the leg, and the like). Generally, one pair of disposable diapers for infants (one left and one right) and two disposable diapers for adults (two left and right) are laid.

Example

The disposable diaper of the present invention will be described more specifically with reference to the drawings. However, the disposable diaper according to the present invention includes all the disposable diapers having the specific features of the invention, and is not limited to the following embodiments.

[Example 1]

Embodiment A pull-on disposable diaper was produced as one disposable diaper. The specific structure is the structure of the disposable diaper 1A shown in Figs. 1A to 1E. This disposable diaper 1A is of an L size for infants and has an anteroposterior length of 485 mm and a width of the front cannulated portion 2 and the posterior cancellation portion 6 (between the side edges 2a and 2b, between the side edges 6a and 6b Is 325 mm. The manufacturing method was carried out by the steps shown in Figs. 11A and 11B.

In the disposable diaper 1A, as shown in Fig. 1F and Figs. 2A to 2C, the cell-forming sheet 82 is disposed on the side of the contact surface per skin of the stretchable and contractible portion 80, Is bonded to the pressing sheet 68, which is one nonwoven fabric constituting the elastic member 80, and the joining portion 84 is formed in a zigzag shape toward the body peripheral direction of the diaper. As shown in Fig. 1B and Fig. 1D, the cell structure is formed not only on the posterior portion 6 side of the diaper but also on the frontal portion 2 side.

In the disposable diaper 1A, as shown in Fig. 1B and Fig. 1D, the cell forming sheet 82 is folded and folded on the outer sheets 62, 63 of the outer sheets 63, 66 constituting the backing sheet 65, (88). As the cell forming sheet 82, a spunbonded nonwoven fabric having a basis weight of 19 g / m 2 is used.

In the disposable diaper 1A, the folded portion 88 is formed by folding one end of the outer sheets 63 and 66 toward the top sheet 18 side with respect to the waist edge frames 62c and 65c. The length of the folded portion 88 in the anteroposterior direction is 80 mm.

As the pressing sheet 68, a separate nonwoven fabric sheet is disposed for the inner sheets 61, 64 and the outer sheets 63, 66. As the pressing sheet 68, a spun bond nonwoven fabric of the same kind as the cell forming sheet 82, that is, a water repellent nonwoven fabric having a basis weight of 19 g / m 2 is used.

As shown in Figs. 1D and 1F, the tip of the pressing sheet 68 is configured so as to come out from the tip of the folded portion 88. And a part of the absorbent main body 14 is covered with the exposed portion. Is formed so as to protrude only 40 mm from the end of the cell forming sheet 82 and is configured to cover a portion of 25 mm from the end of the absorbent main body 14. [

The pressing sheet 68 has a length of 80 mm (the dimension in the front-rear direction of the diaper), and the folded portion 88 is joined to the pressing sheet 68. The bonding portion 84 is formed such that the opening width of the opening end of the cell 86 is 8.5 mm and the depth of the cell is 38 mm and this structure forms a total of 76 outward cells and inward cells toward the body peripheral direction of the diaper Respectively.

1d, the stretchable and contractible portion 80 is provided between the layers of the press sheet 68 and the outer sheets 63 and 66 so that the waist stretchable material 42 is stretched along the waist edge rims 62c and 65c at an elongation of 300% (Three times the original length). As the waist stretchable material 42, a flat rubber (0.35 mm in thickness × 0.65 mm in thickness) made of natural rubber was used.

[Example 2]

A disposable pull-on diaper was produced as the disposable diaper of Example 2. The structure of the disposable diaper 201A shown in Figs. 12A to 12E is specifically described. The length of the disposable diaper 201A in the anteroposterior direction is 520 mm and the width of the posterior accommodating portion 6 (the length between the side edges 6a and 6b) is 380 mm.

The absorbent main body used the absorbent main body 14 having the same structure as the disposable diaper of one embodiment. The longitudinal length of the water absorbent main body 14 was 420 mm. The three-dimensional gathers stretchable material 36 and the leg stretchable material 38 were fixed only to a portion of the crotch-containing portion 204 having a longitudinal length of 260 mm. The external body 216 is not a front-to-rear separation type like the disposable diaper of the embodiment but an integrated body in which the entire body part, the crotch part and the posterior part are integrally formed is used. The width of the crotch part (the position on the A-A 'cross section) of the crotch part was 175 mm. The leg elastic members 240 disposed on the external body 216 are arranged curvilinearly along the outer frame of the leg openings 212 of the external body 216. [

12C, the cell-forming sheet 282 is disposed on the side of the contact portion per skin of the stretchable and contractible portion 280, and the cell-forming sheet 282 is a single nonwoven fabric constituting the stretchable and contractible portion 280. In this disposable diaper 201A, Woven fabric sheet 32, and the joint portion 284 is formed in a staggered shape toward the side along the side edge of the crotch portion.

In the disposable diaper 201A shown in Fig. 12C, a nonwoven fabric sheet separate from the nonwoven fabric sheet 32 constituting the three-dimensional gatherer 26 is used as the cell forming sheet 282. [ Specifically, a water repellent SMS nonwoven fabric sheet having a basis weight of 15 g / m &lt; 2 &gt; is used. The width of the cell-forming sheet (dimension in the diaper body peripheral direction) was 17 mm and the length (dimension in the diaper front-back direction) was 420 mm. And the front and rear ends of the cell-forming sheet were bonded to the front and rear ends of the absorbent main body.

12B, the joining portion 284 is formed such that the opening width of the opening end of the cell is 6.5 mm and the depth of the cell is 15 mm, and the structure is formed in the direction along the side edge of the crotch- A total of 80 inward cells and outward cells were formed.

The stretchable and contractible portion 280 is stretched between the base and the folded portion of the nonwoven fabric sheet 32 so that the stretchable and contractible material 36 is stretched along the upper end of the three- Three times the length) in three elongated states. As the elastic solid material 36, a flat rubber (0.35 mm in thickness × 0.65 mm in thickness) made of natural rubber was used.

[Example 3]

As a third embodiment, a tape-like disposable diaper 301A shown in Figs. 13A to 13D was produced. This tape-type disposable diaper 301A is of an L size for infants and has a sphere shape having a length of 485 mm in the fore and aft direction of the diaper body 370 and a width of 230 mm.

The diaper main body 370 is provided with a thread rubber as a leg elastic member 340 at the side edge portion thereof. The leg stretching members 340 were arranged at a pitch of 7 mm on the left and right sides. And the leg stretchable material 340 disposed at the outermost position at a position of 7 mm from the side edges 370a and 370b of the diaper body 370 is positioned. The leg stretchable material 340 was fixed between the layers of the side sheets 319 and the cover sheet 324 in a stretched state of 300% to constitute the stretchable and contractible portion 380. [

The cell forming sheet 382 was bonded to the contact surface of the side sheet 319 per skin. The width of the cell-forming sheet 382 was 26 mm. The joining portion 384 is formed in a zigzag shape toward the side edge of the crotch portion 304 (side edges 370a and 370b of the diaper body 370). The width of the bonding portion 384 was 0.4 mm. The cell-forming sheet 382 was made of a spunbonded nonwoven fabric, and a nonwoven fabric made of polypropylene having a basis weight of 18 g / m 2 was used. The cell-forming sheet 382 was bonded to the contact surface of the side sheet 319 on the skin side in the ultrasonic seal. The junction portion 384 is formed such that the opening width of the cell end portion is 6 mm and the cell depth is 25 mm and the structure is divided into 80 pieces in the direction along the side edge of the crotch- And 40 inward cells).

The stretchable nonwoven fabric 396 is intermittently joined to the vicinity of the waist edges 370c and 370d of the diaper body 370 toward the periphery of the body of the diaper. As the nonwoven fabric sheets 397 and 398 constituting the stretchable nonwoven fabric, a water repellent SMS nonwoven fabric sheet having a basis weight of 15 g / m 2 was used. 10 yarn rubbers were fixed as a stretchable material 399 at a pitch of 5 mm between the layers of the nonwoven fabric sheets 397 and 398 in a stretched state of 300%.

The elastic nonwoven fabric 396 was bonded to the contact surface of the skin in the vicinity of the waist edges 370c and 370d of the diaper body 370 from the ultrasonic seal (bonding portion 386). That is, a portion near the waist edge 370c, 370d of the diaper body 370 (waist-containing portion) was used as the cell-forming sheet. The joining portion 385 is formed so that the opening width of the opening end of the cell is 8.5 mm and the depth of the cell is 30 mm and 36 pieces of this structure are arranged in the direction along the body periphery of the diaper (18 outward cells, 18).

[Example 4]

As a fourth embodiment, a tape-like disposable diaper 301C shown in Figs. 17A to 17C was produced. This disposable diaper 301C is of an L size for infants and has a rectangular shape with a length of 485 mm in the fore and aft direction of the diaper body 370 and a width of 230 mm.

A yarn rubber having a thickness of 620 dtex was disposed as the leg stretching member 340 on the side edge of the diaper body 370. The leg stretchable members 340 were arranged on the left and right sides at a pitch of 5 mm. And the leg stretchable material 340 disposed at the outermost position at a position of 10 mm from the side edges 370a and 370b of the diaper body 370 is positioned. The leg stretchable material 340 is fixed between the layers of the side sheets 319 and the cover sheet 320 and between the layers of the side sheets 319 and the cover sheet 324 in a stretched state of 250% Respectively.

The nonwoven fabric sheet 333 (the cell forming sheet 382) is attached to the side surface of the side sheet 319 along the side edge (the side edges 370a and 370b of the diaper body 370) of the crotch covering portion 304 Direction. &Lt; / RTI &gt; The cell-forming sheet 382 was made of a spunbonded nonwoven fabric, and a nonwoven fabric made of polypropylene having a basis weight of 18 g / m 2 was used. The cell-forming sheet 382 was bonded to the contact surface of the side sheet 319 on the skin side in the ultrasonic seal. More specifically, the junction portion 384 is formed by collecting a plurality of spherical shaped joint portions each having a width of 0.4 mm and a length of 10 mm, and the spherical shaped joint portion is formed in a shape of 7 mm in the direction along the side edge of the crotch- Spacing, and the direction of the body around the diaper.

Further, the solid gathers 327 were formed by a part of the nonwoven fabric sheet 333. The length from the fixed end (lower end) to the free end (upper end) of the solid gathers 327 was 30 mm. The three-dimensional gathers 327 are provided with a rubber thread as a three-dimensional gathom stretchable material 337. The three-dimensional gathers stretching members 337 were arranged at a pitch of 5 mm on each of the left and right sides. And the three-dimensional gathers stretchable member 337 disposed at the free end side at a position 2 mm from the free end of the three-dimensional gatherer 327 are positioned. The stretchable and contractible portion 381 was formed by fixing the elastic solidification material 337 in a stretched state of 300% between the base portion 379 of the nonwoven fabric sheet 334 and the nonwoven fabric sheet 333.

A nonwoven fabric sheet 334 (cell forming sheet 383) is attached to the side of the skin 20 mm from the free end of the three-dimensional gatherer 327 to the side edge of the crotch covering portion 304 (the side edge 370a of the diaper body 370 , 370b). The cell forming sheet 383 was bonded to the contact surface of the nonwoven fabric sheet 333 per skin in the ultrasonic seal. The joining portion 385 has the same shape as the joining portion 384 of the same shape. As the nonwoven fabric sheets 333 and 334, a water repellent SMS nonwoven fabric sheet having a basis weight of 15 g / m 2 was used.

Industrial availability

The disposable diaper according to the present invention can be used as a disposable diaper for adults or an adult such as an elderly person or a disabled person requiring nursing care, more specifically as a pull-on disposable diaper or a tape-type disposable diaper.

1A, 1B: Disposable diaper, 2: Whole body part, 4: Inseam part,
6: posterior part, 7, 8: joint,
10: waist opening, 12: leg opening,
14: absorbent main body, 16: external body,
18: top sheet, 20: back sheet, 22: absorber,
24: cover sheet, 26: steric gathers, 28: joining portion,
32: nonwoven fabric sheet, 36: stretchable elastic material,
38, 40: leg stretchable material, 42: waist stretchable material, 44: dummy stretchable material,
54: suppository, 56: low tissue, 64, 61: inner sheet,
62: front outer case, 62a, 62b: side edge,
62c: waist edge frame, 66, 63: outer sheet, 65:
65a, 65b: side edge, 65c: west edge edge,
67, 69, 71, 73, 75: nonwoven fabric sheet, 68:
78: exposed portion, 80, 81: stretchable portion,
82, 82A, 82B, 82C, 82D, 82E, 82F, 83:
84, 84A, 84B, 84C, 84D, 84E, 84F, 85 :: joints,
86, 86A, 86B, 86C, 86D, 86E, 86F: cell, 88:
89: slit, 201: disposable diaper, 202:
202a, 202b: side frame, 202c: west end frame,
204: crotch part, 206: posterior part,
206a, 206b: side frame, 206c: west end frame,
207, 208: junction, 210: waist opening, 212: leg opening,
215: inner sheet, 216: outer sheet, 217: outer sheet,
240: leg stretchable material, 242: waist stretchable material, 244: dummy stretchable material,
268: pressing sheet, 280: stretching part,
282: a cell-forming sheet, 284:
301A, 301B, 301C, 301D, 301e: disposable diaper, 302:
304: crotch part, 306: posterior part, 311: adhesive tape,
313: front patch, 318: top sheet, 319: side sheet,
320: back sheet, 322: absorber, 324: cover sheet,
326, 327: steric gathers, 332, 333, 334: nonwoven sheet,
336, 337: a three-dimensional gathering elastic member, 340: a leg stretching member,
342: West stretch material, 346: Loop material, 348: Hook material,
350: base material, 370: diaper body,
370a, 370b: side edge, 370c, 370d: west edge edge,
372: front side flap, 374: rear side flap,
374a, 374b: side rim, 378, 379: buckle, 379: base,
380, 381: stretchable portion, 382, 383: cell-forming sheet,
384, 384A, 384B, 384C, 385: junction, 386: cell,
390, 390A, 390B, 390C: Line type joint,
392, 392A, 392B: dot-shaped junctions,
396: stretchable nonwoven fabric, 397, 398: nonwoven fabric sheet, 399: stretchable material.

Claims (15)

And a crotch cloth part for covering the wearer's crotch with an absorbent body disposed thereon, the crotch cloth part for covering the crotch part of the wearer,
A stretchable portion made of a stretchable nonwoven fabric is formed on at least one of the front portion, the rear portion, and the crotch portion,
The stretchable nonwoven fabric is such that the stretchable material is fixed to the nonwoven fabric sheet and the nonwoven fabric sheet and the stretchable material act integrally,
The stretchable and contractible portion is formed to contract in at least one of a direction along the periphery of the body and a direction along a side edge of the crotch portion,
A cell-forming sheet made of a nonwoven fabric is disposed on a part of a contact surface per skin in a portion where the stretchable portion is formed,
A joining portion for intermittently joining the cell-forming sheet and the stretchable and contractible portion toward the shrinking direction of the stretchable and contractible portion is formed,
A cell extending in an intersecting direction intersecting with a contraction direction of the stretchable and contractible portion is formed between the cell forming sheet and the stretching and shrinking portion by the joining portion,
An outward cell in which an end portion near the outer space of the diaper is closed and an end portion far from the outer space of the diaper is closed by the joining portion and an end portion farther from the outer space of the diaper are opened, Wherein an inward cell in which an end portion closer to the outer space of the body is closed by the abutment portion is formed. delete delete The method according to claim 1,
Wherein a plurality of cells are arranged in parallel in the contraction direction,
Wherein the cell array has the outward cell and the inward cell alternately arranged. The method of claim 4,
The joining portion is a zigzag or dashed joining portion continuous in the shrinkage direction,
And the outward cell and the inward cell are alternately partitioned by the joining portion. The method according to any one of claims 1 to 4,
A plurality of cells are formed in a row of cells arranged in parallel in the shrinking direction,
The cell rows are arranged in plural stages toward the intersecting direction,
A portion extending in the intersecting direction and a portion extending in the intersecting direction are arranged in a straight line in a junction portion forming a cell in a cell column adjacent to the one cell column And the plurality of cell rows are arranged so as not to overlap with each other. The method of claim 6,
Wherein the plurality of cell rows are arranged so that an extension of a portion extending in the intersecting direction among the junctions forming a cell in one cell row passes through the cell in the adjacent cell row with respect to the one cell row. And a crotch cloth part for covering the wearer's crotch with an absorbent body disposed thereon, the crotch cloth part for covering the crotch part of the wearer,
A stretchable portion made of a stretchable nonwoven fabric is formed on at least one of the front portion, the rear portion, and the crotch portion,
The stretchable nonwoven fabric is such that the stretchable material is fixed to the nonwoven fabric sheet and the nonwoven fabric sheet and the stretchable material act integrally,
The stretchable and contractible portion is formed to contract in at least one of a direction along the periphery of the body and a direction along a side edge of the crotch portion,
A cell-forming sheet made of a nonwoven fabric is disposed on a part of a contact surface per skin in a portion where the stretchable portion is formed,
A joining portion for intermittently joining the cell-forming sheet and the stretchable and contractible portion toward the shrinking direction of the stretchable and contractible portion is formed,
A cell extending in an intersecting direction intersecting with a contraction direction of the stretchable and contractible portion is formed between the cell forming sheet and the stretching and shrinking portion by the joining portion,
Wherein at least the left and right side edge portions of the crotch portion have a stretchable and contractible portion made of the stretchable nonwoven fabric,
The stretchable and contractible portion is formed to contract in a direction along a side edge of the crotch-
A cell-forming sheet made of a water-repellent nonwoven fabric is disposed on a part of the contact surface per skin in the crotch part,
A connecting portion for intermittently joining the cell-forming sheet and the stretchable and contractible portion toward a direction along a side edge of the crotch-
And a cell extending in an intersecting direction intersecting with a side edge of the crotch portion is partitioned by the joint between the layer of the cell forming sheet and the stretching portion. The method of claim 8,
Wherein the stretchable and contractible portion made of the stretchable nonwoven fabric is formed on at least an end portion of the crotch-firing portion on the side of the rear end portion, the stretchable and contractible portion is formed to contract in the body peripheral direction,
Wherein the cell-forming sheet made of a water-repellent nonwoven fabric is disposed on a part of the contact surface per side of the skin on the side of the posterior to the posterior portion,
A joining portion for intermittently joining the cell-forming sheet and the stretchable and contractible portion toward the body peripheral direction is formed,
Wherein a cell extending in an intersecting direction intersecting with a circumferential direction of the body is defined between the cell-forming sheet and the stretchable and contractible portion by the joining portion. The method of claim 9,
A stretchable portion made of the stretchable nonwoven fabric is formed at least on the crotch portion on the side of the crotch covering portion, and the stretchable and contractible portion is formed to contract in a direction along the periphery of the body,
Wherein the cell-forming sheet made of a water-repellent nonwoven fabric is disposed on a part of the contact surface per side of the skin at the end of the crotch portion,
A joining portion for intermittently joining the cell-forming sheet and the stretchable and contractible portion toward the body peripheral direction is formed,
Wherein a cell extending in an intersecting direction intersecting with a circumferential direction of the body is defined between the cell-forming sheet and the stretchable and contractible portion by the joining portion. The method of claim 10,
A stretchable and contractible portion formed on a side edge of the crotch portion and formed on an end of the crotch portion on the side of the crotch portion; At least one of the legs is continuously arranged to form a leg stretchable portion surrounding the legs of the wearer,
A joint portion for intermittently joining the cell-forming sheet and the leg stretching and shrinking portion toward the shrinking direction of the leg stretching and shrinking portion is formed,
And a cell extending in an intersecting direction intersecting with a contraction direction of the leg stretching and shrinking section is formed in the space between the cell forming sheet and the leg stretching and shrinking section by the abutting section. The method according to any one of claims 8 to 11,
Wherein the elastic member is disposed between the layers of the plurality of nonwoven fabric sheets and the elastic member is fixed to the plurality of nonwoven fabric sheets so that the plurality of nonwoven fabric sheets and the stretchable member move integrally. The method according to any one of claims 8 to 11,
Wherein the stretchable and contractible portion is fixed to the nonwoven fabric sheet such that the nonwoven fabric sheet and the stretchable film integrally move. The method according to any one of claims 8 to 11,
Wherein the cell-forming sheet and the stretchable and contractible portion are intermittently joined to the shrinking direction of the stretchable and contractible portion and joined together by a joint portion continuously formed in a direction orthogonal to the shrinkage direction of the stretchable and contractible portion. The method according to any one of claims 8 to 11,
Wherein the cell-forming sheet and the stretchable and contractible portion are joined by a joint portion formed intermittently toward both the shrinking direction of the stretchable and contractible portion and the direction orthogonal to the shrinking direction of the stretchable and contractible portion.

Images