CN108778212B

CN108778212B - Disposable diaper

Info

Publication number: CN108778212B
Application number: CN201780017041.3A
Authority: CN
Inventors: 杉山胜彦
Original assignee: Oji Holdings Corp
Current assignee: Oji Holdings Corp
Priority date: 2016-03-17
Filing date: 2017-02-24
Publication date: 2020-12-15
Anticipated expiration: 2037-02-24
Also published as: JP6531686B2; TWI702036B; CN108778212A; JP2017164357A; WO2017159292A1; TW201834622A

Abstract

The invention aims to improve the air permeability of a tuck forming part in a disposable diaper separated into a front body outer package, a back body outer package and an absorbent body. The solution of the present invention is to provide a disposable diaper comprising a front body outer cover (10), a back body outer cover (20), and an absorbent body (30), wherein the absorbent body (30) is connected to the outer cover of either or both of the front body outer cover (10) and the back body outer cover (20) via a connecting portion (40) having an upward folded portion (41) and a downward folded portion (42) extending in the width direction of the diaper, the connecting portion (40) is a structure in which a liquid-impermeable leakage-preventing sheet (51) and an outer nonwoven sheet (52) positioned on the non-skin-facing side of the leakage-preventing sheet (51) are laminated in the thickness direction, and the outer nonwoven sheet (52) extends in the length direction of the diaper beyond the end edge of either or both of the upper end edge (51a) and the lower end edge (51b) of the leakage-preventing sheet (51).

Description

Disposable diaper

Technical Field

The present invention relates to a disposable diaper which is worn in the crotch of a wearer to absorb and retain liquid such as urine.

Background

Conventionally, disposable diapers having a plurality of tucks formed in the rear body have been known. For example, in a disposable diaper disclosed in patent document 1, a tuck is formed by folding a sheet member constituting a back body along an upward folding line and a downward folding line. The tuck can be unfolded in the upward and downward direction in accordance with the stretch of the back of the wearer when the wearer leans forward, for example. Therefore, the rear body of the diaper is prevented from being displaced in the crotch direction of the wearer and from being loosened in the vicinity of the crotch, and the situation in which the back of the wearer is exposed due to the lack of the length of the rear body portion or a gap is generated between the disposable diaper and the back of the wearer can be avoided.

Documents of the prior art

Patent document

Japanese patent laid-open No. 2012 and 239555 in patent document 1

Disclosure of Invention

Problems to be solved by the invention

As described above, by forming a plurality of tucks in the back of the disposable diaper, the diaper can conform to the stretch of the wearer's body, thereby enhancing the fit or wear of the diaper. However, since the tuck is formed by folding the sheet member constituting the back body, the air permeability at the overlapped portion of the sheet members is lowered, and moisture is trapped between the skin of the wearer and the diaper, which may cause discomfort to the wearer due to the damp and stuffy feeling. Further, when the number of pleats is large, there is a problem that the air permeability is remarkably reduced.

Accordingly, an object of the present invention is to improve the air permeability of a tuck-forming portion in a disposable diaper separated into a front body outer cover, a back body outer cover, and an absorbent main body.

Means for solving the problems

The present invention relates to a disposable diaper. The disposable diaper of the present invention comprises: a front body exterior body 10 positioned on the wearer's abdomen side, a back body exterior body 20 positioned on the wearer's back side, and an absorbent body 30 positioned in the wearer's crotch. The present invention is applicable to any of underpants type disposable diapers and belt type disposable diapers. A pants-type disposable diaper is of a type in which a front body outer package 10 and a rear body outer package 20 are joined to each other by side seals provided on both left and right sides in the width direction of the disposable diaper to form a substantially ring shape, and a waist opening located around the wearer's stomach and leg openings located around both wearer's legs are formed. The tape type disposable diaper is of a type in which a pair of or more left and right fastening tapes are attached to both side end portions in the width direction of one of the front body outer package 10 and the rear body outer package 20, and the fastening tapes are attached to the crotch of the wearer by fastening the fastening tapes to the other outer package.

The absorbent main body 30 is connected to the outer cover of either or both of the front body outer cover 10 and the back body outer cover 20 via a connecting portion 40 having an upward folded portion 41 and a downward folded portion 42 extending in the width direction of the disposable diaper. The term "upward fold" herein means a folded portion that is convex upward in a worn state, and the term "downward fold" means a folded portion that is convex downward in a worn state. The connecting portion 40 may be a separate member from the front body exterior body 10, the rear body exterior body 20, and the absorbent main body 30, may be a member integral with the absorbent main body 30, or may be a member integral with the exterior body. In the present specification, the term "exterior body" refers to both or either of the front body exterior body 10 and the rear body exterior body 20.

In the above configuration, the vent property at the tuck-formed portion can be improved by providing the connecting portion 40 between the absorbent main body 30 and the

exterior bodies

10 and 20 and forming the tuck at the connecting portion 40.

Further, it is necessary to prevent leakage of excrement such as urine and loose stool from the connection portion 40. Therefore, in the present invention, the connection portion 40 has a structure in which the leakproof sheet 51 and the outer nonwoven sheet 52 positioned on the non-skin-facing side of the leakproof sheet 51 are laminated in the thickness direction. The leakproof sheet 51 is preferably a sheet member having liquid impermeability and air permeability. The outer nonwoven fabric sheet 52 may be mainly composed of a nonwoven fabric, or may be composed of only a nonwoven fabric. By including the leakproof sheet 51 in the connection portion 40, leakage of excrement can be prevented. Further, by covering the non-skin-facing side of the leakproof sheet 51 with the outer nonwoven sheet 52, the texture of the coupling section 40 can be improved.

In the present invention, the outer nonwoven sheet 52 extends in the longitudinal direction of the disposable diaper beyond the end edge of either or both of the upper end edge 51a and the lower end edge 51b of the leakproof sheet 51. The term "upper edge" refers to an upper side edge in a worn state, i.e., an edge on the waist opening side of the disposable diaper. The term "lower edge" refers to a lower side edge in a worn state, i.e., a crotch side edge of the disposable diaper. In this way, the upper edge 51a and/or the lower edge 51b of the barrier sheet 51 are covered with the outer nonwoven fabric sheet 52, and the touch and appearance can be improved.

The coupling portion 40 has an intermediate region 43 located between the upward fold 41 and the downward fold 42. The intermediate region 43 has a joining region 43a, and the joining region 43a is joined to either or both of a portion facing the skin surface side and a portion facing the non-skin surface side of the intermediate region 43 in a peelable or non-peelable manner in a state where the connection portion 40 is folded in the upward folded portion 41 and the downward folded portion 42. In addition, the intermediate region 43 may be bonded to a region facing the skin-facing side or a region facing the non-skin-facing side in the bonded region 43 a. Also, the joining region 43a may cover the entire area of the intermediate region 43, but in this case, the joining region 43a releasably joins the intermediate region 43 to its facing portion (i.e., temporary joining). Further, the joining region 43a may join the intermediate region 43 to its facing portion non-peelably, but in this case, the joining region 43a is provided locally to the intermediate region 43. When the bonding region 43a is provided in a part of the intermediate region 43, the other region is referred to as a non-bonding region 43 b. In the case of a pants-type disposable diaper, the side seals 4 may also be construed to function as the joining regions 43 a.

In the disposable diaper of the present invention, the connecting portion 40 and the outer package are preferably formed as separate members. In this case, the connecting portion 40 further has an inner region 44, and the inner region 44 includes a joining portion 44a extending from the downward folded portion 42 toward the outer cover and joined to the non-skin-facing side of the outer cover. In the joining portion 44a of the inner region 44, the outer nonwoven fabric sheet 52 preferably extends beyond the upper edge 51a of the leakproof sheet 51.

In the disposable diaper of the present invention, the connecting portion 40 and the absorbent main body 30 are preferably formed as separate bodies. In this case, the connecting portion 40 further has an outer region 45, and the outer region 45 includes a joining portion 45a extending from the upward folded portion 41 toward the absorbent body 30 and joined to the non-skin-facing side of the absorbent body 30. In the joining portion 45a of the outer region 45, the outer nonwoven fabric sheet 52 preferably extends beyond the lower edge 51b of the leakproof sheet 51.

In the above configuration, in the portion where the connection portion 40 is joined to the exterior body or the absorbent main body 30, the outer nonwoven fabric sheet 52 extends beyond the

end edges

51a, 51b of the leakproof sheet 51, so that the

end edges

51a, 51b of the leakproof sheet 51 can be completely covered with the outer nonwoven fabric sheet 52, and the leakproof sheet 51 is not exposed. In addition, according to the above configuration, since the outer nonwoven fabric sheet 52 is formed of nonwoven fabric, the outer nonwoven fabric sheet 52 completely covers the edge of the leakproof sheet 51, thereby improving the appearance and texture.

In the disposable diaper of the present invention, the connection portion 40 may further include an inner nonwoven fabric sheet 53 laminated in the thickness direction on the skin-facing side of the leakproof sheet 51. The inner nonwoven fabric sheet 53 is mainly composed of a nonwoven fabric, and may be composed of only a nonwoven fabric. In this case, the inner nonwoven sheet 53 preferably extends beyond the end edge of either or both of the upper end edge 51a and the lower end edge 51b of the leakproof sheet 51 in the longitudinal direction of the disposable diaper, as does the outer nonwoven sheet 52. In particular, the outer nonwoven sheet 52 and the inner nonwoven sheet 53 sandwiching the leakproof sheet 51 are preferably joined to each other at a portion extending beyond the edge of the leakproof sheet 51.

In the above configuration, the inner nonwoven fabric sheet 53 is also bonded to the skin-facing surface of the leakproof sheet 51, so that the skin of the wearer is not in direct contact with the leakproof sheet 51, but the inner nonwoven fabric sheet 53 with a good skin feel is in contact with the skin. Further, according to the above configuration, since the inner nonwoven fabric sheet 53 having a pleasant feel to the skin comes into contact with the skin of the wearer, a gap between the skin and the connection portion 40 is secured, and moisture accumulated therebetween can be discharged to the outside.

In the disposable diaper of the present invention, the outer nonwoven sheet 52 may be folded back to the skin-facing side of the leakproof sheet 51 beyond the end edge of either or both of the upper end edge 51a and the lower end edge 51b of the leakproof sheet 51. That is, the outer nonwoven fabric sheet 52 is configured to sandwich the

end edges

51a, 51b of the leakproof sheet 51 from both the skin-facing surface and the non-skin-facing surface.

With the above configuration, the

edge

51a or 51b of the barrier sheet 51 is sandwiched between the outer nonwoven sheets 52, and the edge of the barrier sheet 51 can be more reliably prevented from being exposed. Further, if the outer nonwoven sheet 52 is extended to extend to the non-skin-facing surface of the leakproof sheet 51, the leakproof sheet 51 can be prevented from directly contacting the skin of the wearer by the outer nonwoven sheet 52. That is, the function of the inner nonwoven fabric sheet 53 can be supported by the outer nonwoven fabric sheet 52.

Effects of the invention

According to the present invention, in the disposable diaper separated into the front body outer cover, the rear body outer cover, and the absorbent body, the air permeability of the tuck-forming portion can be improved.

Drawings

Fig. 1 is a schematic exterior perspective view of a disposable diaper according to an embodiment of the present invention.

Fig. 2 is an exploded view of a disposable diaper according to an embodiment of the present invention.

FIG. 3 is a longitudinal cross-sectional view of a disposable diaper according to an embodiment of the present invention.

Fig. 4 is a longitudinal sectional view showing a state where a pleat is unfolded from the state shown in fig. 3.

Fig. 5 is an external perspective view of a state in which the tuck is unfolded from the state shown in fig. 1.

Fig. 6 is an enlarged longitudinal cross-sectional view of a rear portion of the longitudinal cross-sectional view shown in fig. 3.

Fig. 7 is a cross-sectional view of a variation of the disposable diaper 1 according to the invention corresponding to fig. 6.

Fig. 8 is a cross-sectional view of a variation of the disposable diaper 2 of the invention corresponding to fig. 6.

FIG. 9 is a perspective view showing the appearance of a disposable diaper 3 according to a variation of the present invention corresponding to FIG. 1.

Detailed Description

Hereinafter, embodiments of the present invention will be described with reference to the drawings. The present invention is not limited to the embodiments described below, and may include appropriate modifications within a scope apparent to those skilled in the art from the following embodiments.

In the present specification, the term "longitudinal direction" refers to the front-back direction of the disposable diaper, and means the direction in which the front body and the back body of the disposable diaper are connected. Further, the term "width direction" means a direction orthogonal to the longitudinal direction in a plane. In the drawings, the "longitudinal direction" is represented by the Y axis, and the "width direction" is represented by the X axis.

In the present specification, the term "skin-facing surface" refers to a surface that faces the skin of a wearer when the disposable diaper is worn. Further, the term "non-skin-facing side" refers to a side not facing the skin of the wearer in the worn state of the disposable diaper, that is, a side opposite to the skin-facing side.

In the present specification, the term "a to B" means "a to B inclusive".

[ outer covering and absorbent body ]

Fig. 1 is an external perspective view of a disposable diaper according to an embodiment of the present invention. Fig. 2 is an expanded view of the disposable diaper shown in fig. 1, which shows the diaper as viewed from the skin-facing side. Furthermore, fig. 3 is a longitudinal section through the disposable diaper shown in fig. 1, which is a sectional configuration at the section line III-III shown in fig. 1. In the present specification, the present invention will be described by way of example in the case where the present invention is applied to a disposable diaper of the pants type. However, the present invention is not limited to use in pants-type disposable diapers, and may be applied to belt-type disposable diapers.

As shown in fig. 1 to 3, the disposable diaper 100 of the present invention is divided into: a front body 1 which contacts the wearer's abdomen, a back body 2 which contacts the wearer's back, and a crotch portion 3 which is positioned between the front body 1 and the back body 2. In the present embodiment, the front body exterior member 10 is positioned at the front body 1, and the rear body exterior member 20 is positioned at the rear body 2. The absorbent body 30 is positioned in the crotch portion 3, and the absorbent body 30 extends in the longitudinal direction while overlapping the front body 1 and the back body 2 with the crotch portion 3 as the center. Therefore, in the absorbent main body 30, the end portion on the front body 1 side overlaps the front body exterior body 10 in the thickness direction. On the other hand, the end portion on the back 2 side overlaps the back cover 20 in the thickness direction. In the present invention, the front body exterior body 10, the rear body exterior body 20, and the absorbent main body 30 are basically constituted by separate members. In the present embodiment, each of the

exterior bodies

10 and 20 is formed in a substantially rectangular shape that is long in the width direction in a plan view. The absorbent body 30 is formed in a substantially rectangular shape that is long in the longitudinal direction in a plan view. However, the shapes of the

exterior bodies

10 and 20 and the absorbent main body 30 are not limited to those shown in the drawings, and may be appropriately modified within the range in which the function of the present invention can be exerted.

Further, side sealing portions 4 are provided at both left and right end portions in the width direction (X-axis direction) of the front body exterior body 10 and the rear body exterior body 20. In the side seal 4, portions facing both left and right ends of the front body exterior body 10 and the rear body exterior body 20 are joined to each other. The bonding method may be a conventional method such as heat sealing, ultrasonic sealing, or bonding with a hot-melt adhesive. As shown in fig. 1, the front body exterior member 10 and the rear body exterior member 20 are joined at the side seal portion 4, whereby these

exterior members

10 and 20 are joined in a ring shape. The waist opening 5 is defined by the upper edges of the front body cover 10 and the back body cover 20. Further, an absorbent body 30 is disposed so as to span from the lower end portion of the front body exterior body 10 to the lower end portion of the rear body exterior body 20. Therefore, the left and right leg openings 6 are defined by the left and right side edges of the absorbent body 30 and the lower edges of the

exterior bodies

10 and 20. The wearer can put on the underpants type disposable diaper 100 by putting both feet through the waist opening 5 and putting one foot out of each of the left and right leg openings 6.

As shown in fig. 3, each of the

exterior bodies

10 and 20 includes:

inner sheets

11 and 21 positioned on the skin-facing side;

outer sheets

12, 22 positioned on the non-skin-facing side; and one or more

waist stretching members

13, 23 positioned between the inner panel and the outer panel. When the

waist stretching members

13 and 23 are plural, they are disposed at a predetermined interval in the longitudinal direction. The

waist stretching members

13 and 23 are sandwiched and fixed between the

inner panels

11 and 21 and the

outer panels

12 and 22 in a state of being stretched in the diaper width direction. For example, a hot melt adhesive or the like may be directly applied to the

waist stretching members

13 and 23 in an extended state, and the member body to which the adhesive is applied may be disposed between the

inner sheets

11 and 21 and the

outer sheets

12 and 22. In this way, when the

waist stretching members

13 and 23 contract, the

inner sheets

11 and 21 and the

outer sheets

12 and 22 are wrinkled to form a plurality of fine wrinkles (waist wrinkles). The number of the

waist stretching members

13 and 23 to be disposed is not particularly limited, but is preferably 3 to 20 or 4 to 15, for example.

The sheet members forming the

inner sheets

11, 21 and the

outer sheets

12, 22 may be formed of conventional materials, but are not particularly limited thereto, and are preferably formed of nonwoven fabric having good tactile sensation to the skin. Examples of the nonwoven fabric include air-through nonwoven fabric, point-bonded nonwoven fabric, spun bond nonwoven fabric, air-laid nonwoven fabric, melt-blown nonwoven fabric, SMS nonwoven fabric, SMMS nonwoven fabric and the like. The

waist stretching members

13 and 23 may be conventional elastic stretching members, but for example, a thread-like elastic rubber is preferable. As such a rubber material, styrene rubber, olefin rubber, urethane rubber, ester rubber, polyurethane, polyethylene, polystyrene, styrene-butadiene, silicone, polyester and the like can be used.

As shown in fig. 3, the

outer sheets

12 and 22 may extend upward in the longitudinal direction of the

inner sheets

11 and 21, and the extended portions may be folded back to the skin-facing surface side at the end edges of the waist opening 5 and joined to the skin-facing surfaces of the

inner sheets

11 and 21. In this way, the skin of the waist opening 5 can be made soft.

As shown in fig. 3, the absorbent body 30 basically includes: an absorbent body 31 for absorbing and retaining body fluid; a liquid-permeable top sheet 32 covering the skin-facing surface of the absorbent body 31; and a liquid-impermeable back sheet 33 covering the non-skin-facing surface of the absorbent body 31. The top sheet 32 and the back sheet 33 are joined to the peripheral edge of the absorbent body 31. Body fluid discharged from the crotch of the wearer is guided to the absorbent body 31 through the top sheet 32 and is prevented from leaking to the outside by the back sheet 33.

The absorber 31 is a member for absorbing body fluid such as urine and holding the absorbed body fluid. The absorbent body 31 is generally configured by covering an absorbent material with a core wrap sheet such as a tissue. The absorbent material constituting the absorbent body 31 may be a conventional material. The absorbent material may be, for example, fluff pulp, superabsorbent polymer, or a hydrophilic sheet. The absorbent material may be used alone in 1 kind or in combination of 2 or more kinds in the fluff pulp, the super absorbent polymer, or the hydrophilic sheet. The absorbent material may be generally used to form a single layer or a multiple layer mat-like article. The shape of the absorber 31 can be appropriately designed according to the shape, size, and use of the disposable diaper. For example, the absorber 31 may be shaped as a hourglass as shown in fig. 2, or may be generally rectangular, oval, or gourd-shaped.

The top sheet 32 is a member that directly contacts the skin of the wearer's crotch and allows body fluid such as urine to permeate into the absorbent body 31. Therefore, the top sheet 32 is made of a liquid-permeable material having high flexibility. In the present specification, the term "liquid-permeable" means: for example, when 5ml of water at normal temperature is poured onto the sample under normal atmospheric pressure, the water is permeable in less than 1 minute. Examples of the liquid-permeable material constituting the top sheet 32 include a woven fabric, a nonwoven fabric, and a porous film. Further, for example, a nonwoven fabric can be produced by hydrophilizing fibers of a thermoplastic resin such as polypropylene, polyethylene, polyester, or nylon.

The back sheet 33 is a member for preventing body fluid, which has penetrated through the top sheet 32 and has been absorbed by the absorbent body 31, from leaking to the outside. The back sheet 33 is thus constructed of a liquid impermeable material. In the present specification, the term "liquid-impermeable" means: for example, when 5ml of water at ordinary temperature is poured onto a sample under normal atmospheric pressure, the water does not permeate even after 1 minute or more. An example of the liquid impermeable material constituting the back sheet 33 is a plastic film made of polyethylene resin or the like. In particular, the back sheet 33 preferably uses a microporous polyethylene film formed with a plurality of fine pores of 0.1 to 4 μm.

In addition to the above configuration, the absorbent body 30 also has a cover sheet 34 on the non-skin-facing side of the back sheet 33. To improve the feel of the covering back sheet 33, the cover sheet 34 is attached to the non-skin-facing surface of the back sheet 33. The material constituting the cover sheet 34 may be woven or nonwoven fabric. In particular, the material constituting the cover sheet 34 is preferably a nonwoven fabric or a wet nonwoven fabric made of a thermoplastic resin such as polyethylene, polypropylene, or polyester.

In addition to the above configuration, the absorbent body 30 has a member for forming three-dimensional gathers. The three-dimensional gathers are composed of a pair of side sheets 35 having water repellency and disposed along both left and right side edges of the absorbent body 31, and one or more three-dimensional gather stretching members 36 disposed at inner end edges in the width direction of the side sheets 35. The side sheet 35 has: a fixed portion fixed to the skin-facing surface of the top sheet 32 in the longitudinal direction, and a free end portion located further inward than the fixed portion in the width direction and not fixed to the top sheet 32. The side sheet 35 has a free end portion to which a three-dimensional bellows member 36 is fixed in an extended state in the longitudinal direction. Therefore, when the three-dimensional gather stretching member 36 is contracted, the free end portion of the side sheet 35 is raised by the contraction force, and a three-dimensional gather is formed. The three-dimensional gathers formed in this manner rise along both side edges of the absorbent body 31, and function as leakage preventing walls for preventing lateral leakage of body fluid excreted by the wearer.

In addition to the above configuration, the absorbent body 30 further includes leg stretch members 37 along both left and right side edges in the width direction of the absorbent body 30. The leg stretch members 37 are fixed to the non-skin-facing surface of the side sheet 35 in a state of being elongated in the longitudinal direction, for example. When the leg stretch members 37 contract, the side panels 35 will buckle to form a plurality of fine wrinkles (leg gathers).

[ Joint portion ]

The disposable diaper 100 of the present invention further includes a connecting portion 40 for connecting the absorbent body 30 to the outer package of either or both of the front body outer package 10 and the back body outer package 20. In the embodiment described in the present specification, a front connecting member 40A for connecting the absorbent main body 30 and the front body cover 10 and a rear connecting member 40B for connecting the absorbent main body 30 and the rear body cover 20 are provided as the connecting portions 40. In the present invention, the connecting portion 40 may be provided on at least one of the front body 1 side and the rear body 2 side. In particular, the connection portion 40 is preferably provided in a form of connecting at least the absorbent main body 30 and the rear body exterior body 20.

As shown in the sectional view of fig. 3, in the present embodiment, the front connecting member 40A, the front body exterior body 10, and the absorbent main body 30 are separate body members. Similarly, the rear connecting member 40B, the rear outer body 20, and the absorbent main body 30 are separate members. However, although not shown in the drawings, the front side connecting member 40A (connecting portion 40) may be formed as an integral member with the front body exterior body 10 or may be formed as an integral member with the absorbent main body 30. Similarly, the rear connecting member 40B (connecting portion 40) may be formed as an integral member with the rear body exterior body 20 or may be formed as an integral member with the absorbent main body 30.

As shown in fig. 2 and 3, the front and rear connecting

members

40A and 40B are disposed on the non-skin-facing sides of the

exterior bodies

10 and 20 and the absorbent body 30, and are formed to have substantially the same width as the width of the

exterior bodies

10 and 20 in the width direction. In the present embodiment, each of the

coupling members

40A and 40B is formed in a substantially rectangular shape that is long in the width direction in a plan view. Each of the

coupling members

40A and 40B overlaps a portion of each of the

exterior bodies

10 and 20 in the longitudinal direction, and both ends of each of the

coupling members

40A and 40B in the width direction are sealed at portions other than the overlapping portions. That is, the left and right ends of each of the

coupling members

40A and 40B in the width direction are provided with side sealing portions 4 at portions other than the portions overlapping with the

exterior bodies

10 and 20. Further, of both ends in the width direction of each

exterior body

10, 20, the portions other than the portions overlapping with the

respective coupling members

40A, 40B serve as side seals 4, and the front coupling members 40A and the rear coupling members 40B are joined to each other at the left and right side seals 4 to form an underpants type.

As shown in fig. 3, the connecting

members

40A, 40B are folded into a substantially N-shaped cross section, and the skin-facing side regions of the upper ends of the connecting

members

40A, 40B are joined to the

exterior bodies

10, 20, while the skin-facing side regions of the lower ends of the connecting

members

40A, 40B are joined to the absorbent body 30. Specifically, the connecting

members

40A and 40B include: an upward folded portion 41 which is convex upward in a wearing state; and a downward folded part 42 which is convex downward in a wearing state. In the present embodiment, when the upward folded portion 41 is compared with the downward folded portion 42, the upward folded portion 41 is located on the non-skin-facing side, and the downward folded portion 42 is located on the skin-facing side. These upward folded portions 41 and downward folded portions 42 linearly extend in the width direction of the

coupling members

40A and 40B. Therefore, by folding along the upward folded portion 41 and the downward folded portion 42, the connecting

members

40A and 40B each have a substantially N-shaped cross section and include a portion stacked in 3 layers. In the present specification, the structure of each of the connecting

members

40A and 40B foldable along the folded-up portion 41 and the folded-down portion 42 is referred to as a "pleat". In the present embodiment, each of the connecting

members

40A and 40B has a substantially N-shaped cross section, but is not limited thereto, and may have a substantially inverted N-shaped cross section or a structure having a plurality of pleats.

As shown in fig. 3, each of the connecting

members

40A and 40B is divided into a middle region 43, an inner region 44, and an outer region 45 by the upward fold 41 and the downward fold 42 as boundary lines. The intermediate region 43 is a region located between the upward fold 41 and the downward fold 42. The inner region 44 extends upward from the folded-down portion 42 toward the respective

exterior bodies

10 and 20, and has a joint portion 44a joined to the exterior body on the non-skin-facing side. In the example of fig. 3, the entire inner region 44 is formed as the joining portion 44a, but at least a part of the inner region 44 may be joined to each

exterior body

10, 20. The outer region 45 extends downward from the folded-up portion 41 toward the absorbent body 30, and has a joint portion 45a joined to the non-skin-facing side of the absorbent body 30. In the example of fig. 3, a partial region on the lower end side (crotch side) of the outer region 45 is used as the joining site 45a, but the entire region of the outer region 45 may be joined to the absorbent body 30. The

bonding portions

44a and 45a described here can be realized by a conventional adhesive such as a hot-melt adhesive.

In the example shown in fig. 3, the inner regions 44 of the

coupling members

40A and 40B are joined to the non-skin-facing surfaces of the lower ends in the longitudinal direction of the

exterior bodies

10 and 20. The outer regions 45 of the

respective coupling members

40A, 40B are joined to the non-skin-facing surface at the longitudinal end of the absorbent body 30. In this way, the connecting

members

40A and 40B can function to connect the

exterior bodies

10 and 20 and the absorbent main body 30. Here, an example is shown in which the inner regions 44 of the

respective coupling members

40A, 40B are joined to the lower end sides of the respective

exterior bodies

10, 20. However, the inner region 44 may be joined to the upper end side of each of the

exterior bodies

10 and 20. The inner region 44 is freely designed to some extent as to where the non-skin-facing surface of each

exterior body

10, 20 is to be joined.

Referring back to fig. 2, the

coupling members

40A and 40B are folded at the upward folded portion 41 and the downward folded portion 42. In this state, at least a part of the intermediate region 43 in the entire width direction region has a joining region 43a which is peelably joined to a portion of the intermediate region 43 facing the skin-facing side. In the example shown in fig. 2, a bonding region 43a is partially formed in the intermediate region 43, and a portion other than this portion is a non-bonding region 43 b. For example, in the explanation with reference to the example of fig. 3, the inner region 44 is located on the skin-facing side of the intermediate region 43, and the intermediate region 43 and the inner region 44 are joined together in the joining region 43a shown in fig. 2. In the joined region 43a, the intermediate region 43 may join the outer region 45 or the absorbent body 30 positioned on the non-skin-facing side thereof to the intermediate region 43 instead of the inner region 44, or the intermediate region 43 may join the outer region 45 or the absorbent body 30 positioned on the non-skin-facing side thereof together with the inner region 44. In this manner, in the joining region 43a, each of the

coupling members

40A, 40B is fixed in a folded state to restrict its inadvertent unfolding. By peeling off the joining region 43a, the respective connecting

members

40A and 40B can be spread. Fig. 3 is a longitudinal sectional view showing the non-joined region 43 b.

In fig. 2, a shading is conceptually applied to the joining region 43a to show. In the example shown here, the joining region 43a is configured such that: in the regions where the

coupling members

40A, 40B overlap the

exterior bodies

10, 20 in the thickness direction, the joining regions 43a are provided on both the left and right sides in the width direction of the region where the absorbent body 30 is located, and do not overlap the absorbent body 30. That is, in a plan view, the non-joined region 43B is a longitudinal range of a region where the

exterior bodies

10 and 20, the

coupling members

40A and 40B, and the absorbent body 30 overlap. In this way, the joining region 43a can also be defined as: in a range not overlapping with the absorbent body 30, a region having a certain width in the width direction. However, in the pants-type diaper, the side seals 4 themselves may function as the joined regions 43 a. Therefore, in the pants-type diaper, it is not necessary to join the connecting

members

40A and 40B to the

outer casings

10 and 20 with a hot melt adhesive or the like in addition to the side seals 4. That is, the bonding area 43a shown as a ground tint in fig. 2 may be omitted.

With the above configuration, the unfolding property of the tuck is improved by forming the tuck by providing the connection portion 40 between the absorbent main body 30 and the

exterior bodies

10 and 20 as separate bodies. That is, when the absorbent main body 30 is stretched, the connecting portions 40 unfold the pleats in accordance with the movement, so that the pleats are easily unfolded. When the tuck is unfolded, the tuck functions as a pump when pushed by clothing or the like worn by the wearer, and it is expected that the tuck also exhibits an effect of discharging moisture accumulated in the diaper. Further, by previously connecting the respective

outer cases

10 and 20 and the absorbent main body 30 by the respective connecting

members

40A and 40B, when the respective connecting

members

40A and 40B constituting the tuck are unfolded, the respective

outer cases

10 and 20 and the absorbent main body 30 are separated in the longitudinal direction and can be extended in the longitudinal direction of the disposable diaper. Fig. 4 and 5 conceptually show the case where the joining region 43a is peeled off, the connecting

members

40A and 40B are spread, the space defined by the connecting members is expanded, and the

exterior bodies

10 and 20 are separated from the absorbent main body 30. In this way, by forming the structure in which the tucks of the connecting

members

40A and 40B can be unfolded as needed, the

outer bodies

10 and 20 or the absorbent body 30 can be adjusted to follow the movement and displacement of the wearer, and therefore, the occurrence of a gap between the skin of the wearer and the diaper can be effectively prevented. Further, the fit of the diaper to the skin of the wearer is improved, and the wearing feeling is improved. In the case where the joining region 43a can be peeled in the longitudinal direction, the joining region 43a is peeled, whereby the respective connecting

members

40A and 40B can be spread as shown in fig. 4 and 5.

As shown in fig. 2, in a state where the

coupling members

40A and 40B are completely folded along the folded-up portions 41 and the folded-down portions 42, the

exterior bodies

10 and 20 preferably cover the skin-facing surfaces of the longitudinal ends of the absorbent body 30. That is, the space having the downward opening portion is defined by the folded-up portion 41 (see fig. 3) of each of the

coupling members

40A and 40B extending in the width direction, the edge of the joining region 43a extending in the longitudinal direction, the intermediate region 43, and the outer region 45. Also, the longitudinal direction end of the absorbent body 30 can be accommodated in the space. Although not shown, the longitudinal ends of the absorber 31 constituting the absorbent body 30 may be accommodated in the space defined therein. With this configuration, the body fluid or soft feces flowing in the longitudinal direction of the absorbent body 30 can be accommodated in the space, and leakage to the outside can be prevented.

The intermediate region 43 may be bonded to the inner region 44 or the outer region 45 in the bonding region 43a so as not to be peelable. In this case, since the intermediate region 43 is not joined to the non-joining region 43B at the portions on the skin-facing side and the non-skin-facing side, the respective connecting

members

40A, 40B can be freely spread out as needed. In this case, for example, when the wearer starts moving, the tuck of each of the joining

members

40A, 40B is unfolded at the non-joined region 43B. When the non-expanded state and the expanded state of each of the connecting

members

40A and 40B are repeatedly assumed by the movement of the wearer, the space defined by each of the connecting members is sometimes enlarged or reduced, and the bellows portion of each of the connecting members functions as a pump, so that the air staying in the space is continuously discharged. By utilizing the unfolding of the pleats in this manner, moisture remaining in the space of each of the

coupling members

40A and 40B can be easily discharged, and the air permeability of the pleat formation portion can be improved. In addition, the left and right ends of the connecting

members

40A and 40B in the width direction are sealed at the sides except for the overlapping portions with the

exterior bodies

10 and 20, but the overlapping portions may be sealed at the sides together with the

exterior bodies

10 and 20 so as to be peelable or non-peelable. When the overlapping portion is sealed to the

outer cases

10 and 20 at the same side, the joint region 43a may be omitted. The entire longitudinal regions of the left and right ends in the width direction of the connecting

members

40A, 40B may be side-sealed with the

exterior bodies

10, 20 separately in a non-detachable manner.

In this manner, the intermediate region 43 and the joining region 43a joining the facing portions thereof may be either of the peelable temporary joint and the non-peelable joint. Both the peelable temporary bonding and the non-peelable bonding of the bonding region 43a described here can be achieved by using a conventional adhesive such as a hot melt adhesive, and the peelable bonding or the non-peelable bonding can be selected by adjusting the amount of application or the adhesive force of the adhesive. The peelable joint state means, for example, a joint state in which, when peeling is intended, both can be peeled without causing breakage or breakage of the intermediate region 43 or the sheet member constituting the facing portion. In contrast, the non-peelable bonded state means a bonded state in which, for example, peeling is not previously assumed, and when peeling is performed, the intermediate region 43 or the sheet member constituting the facing portion is cracked or broken. In addition, although the joining region 43a may cover the entire widthwise region of the intermediate region 43, in this case, the joining region 43a peelably joins (i.e., temporarily joins) the intermediate region 43 to the facing portion thereof. The bonding region 43a may be formed by bonding the intermediate region 43 to a portion facing the bonding region 43 in a non-peelable manner, but in this case, the bonding region 43a is partially provided in the width direction of the intermediate region 43.

[ laminated sheet Structure of connecting part ]

Next, the structure of the sheet member and the like constituting the coupling portion 40 (

coupling members

40A, 40B) will be described with reference to fig. 6. Fig. 6 is an enlarged view of the periphery of the rear connecting member 40B shown in fig. 3. The structure of the rear connecting member 40B will be described below as an example, but the structure of the rear connecting member 40B described here can also be applied to the front connecting member 40A.

As shown in fig. 6, the rear side coupling member 40B has a structure in which at least 2 pieces of members are stacked in the thickness direction. That is, in the example shown in fig. 6, the rear connecting member 40B has a leakproof sheet 51 and an outer nonwoven sheet 52 bonded to the non-skin-facing side thereof.

The leakproof sheet 51 is a liquid-impermeable sheet member and is disposed for the purpose of preventing body fluid from leaking from the rear connecting member 40B. As with the back sheet 33, the leakproof sheet 51 is preferably a plastic film made of polyethylene resin or the like. In particular, in order to ensure the air permeability of the rear connecting member 40B, it is preferable to use a microporous polyethylene film formed with a plurality of micropores of 0.1 to 4 μm as the leakproof sheet 51. By forming the leakage-preventing sheet 51 with a sheet member having air permeability and liquid impermeability, leakage of body fluid reaching the rear connecting member 40B can be prevented, and occurrence of wetness and stuffiness at the position can be suppressed.

The outer nonwoven sheet 52 is a sheet member mainly composed of nonwoven fabric, and is disposed for the purpose of improving the feel of the non-skin-facing surface of the leakproof sheet 51. The nonwoven fabric used herein is not particularly limited, but examples thereof include air-permeable nonwoven fabrics, point-bonded nonwoven fabrics, spunbonded nonwoven fabrics, air-laid nonwoven fabrics, meltblown nonwoven fabrics, SMS nonwoven fabrics, SMMS nonwoven fabrics and the like. Basically, any sheet member having liquid permeability and air permeability and good hand feeling can be used as the outer nonwoven sheet 52.

As shown in fig. 6, the outer nonwoven sheet 52 extends in the longitudinal direction toward the waist opening 5, and covers the upper edge 51a of the barrier sheet 51. Specifically, the outer nonwoven fabric sheet 52 has an upper extension 52a extending beyond the upper edge 51a of the leakproof sheet 51 at the joining portion 44a of the inner region 44 of the rear connecting member 40B. In the example shown in fig. 6, the outer nonwoven fabric sheet 52 is directly joined to the non-skin-facing surface of the rear body cover 20 at the upper extending portions 52 a.

In FIG. 6, the entire length of the joint 44a of the inner region 44 in the longitudinal direction of the disposable diaper is denoted by the reference numeral P₁The length of the leakage preventing sheet 51 at the joint 44a is indicated by the symbol Q₁The length of the upper extension 52a of the outer nonwoven fabric sheet 52 is denoted by the symbol R₁And (4) showing. For example, the length P of the engagement portion 44a₁Preferably 15mm or more, which may be set to 15 to 50mm, 20 to 45mm, or 25 to 40 mm. Further, the joint length Q of the leakage preventive sheet 51₁Preferably 10mm or more, which may be set to 10 to 40mm, 15 to 35mm, or 20 to 30 mm. Length R of upper extension 52a₁Preferably 1mm or more, which may be set to 1 to 30mm, 3 to 25mm, or 5 to 20 mm. Further, the length R of the upper extension 52a₁The entire length P of the joint portion 44a₁Ratio of (R)₁/P₁) Preferably 5% or more, it may be set to 5 to 60%, 10 to 50%, and particularly preferably 30 to 60%.

As shown in fig. 6, the outer nonwoven sheet 52 extends in the longitudinal direction toward the crotch portion 3, and covers the lower edge 51b of the leakproof sheet 51. Specifically, the outer nonwoven fabric sheet 52 has a lower extending portion 52B extending beyond the lower edge 51B of the leakproof sheet 51 at the joining portion 45a of the outer region 45 of the rear connecting member 40B. In the example shown in fig. 6, the outer surface nonwoven fabric sheet 52 is directly joined to the non-skin-facing surface of the rear body cover 20 at the lower extending portions 52 b.

In FIG. 6, the entire length of the joint portion 45a of the outer region 45 in the longitudinal direction of the disposable diaper is denoted by the reference numeral P₂The length of the leakage-preventing sheet 51 at the joint 45a is indicated by the symbol Q₂The length of the lower extension 52b of the outer nonwoven fabric sheet 52 is denoted by the symbol R₂And (4) showing. For example, the length P of the joint portion 45a₂Preferably 15mm or more, and may be set to 15 to 50mm, 20 to 45mm, or 25 to 40 mm. In addition, the joint length Q of the leakage preventive sheet 51₂Preferably 10mm or more, and may be set to 10 to 40mm, 15 to 35mm, or 20 to 30 mm. Length R of lower extension 52b₂Preferably 1mm or more, and may be set to 1 to 30mm, 3 to 25mm, or 5 to 20 mm. Further, the length R of the lower extension 52b₂The overall length P of the joint portion 45a₂Ratio of (R)₂/P₂) Preferably 5% or more, and may be set to 5 to 60%, 10 to 50%, particularly preferably 30 to 60%.

In the example shown in fig. 6, the outer nonwoven sheet 52 extends beyond the leakproof sheet 51 in both the waist opening 5 side and the crotch 3 side in the longitudinal direction of the disposable diaper. However, in the longitudinal direction of the disposable diaper, the outer-surface nonwoven fabric sheet 52 may extend beyond the leakproof sheet 51 at least on one of the waist opening 5 side and the crotch portion 3 side. That is, the outer nonwoven fabric sheet 52 may have at least one of the upper extending portion 52a and the lower extending portion 52 b.

As described above, the outer nonwoven fabric sheet 52 extends beyond the leakproof sheet 51 to cover the edge thereof, thereby preventing the leakproof sheet 51 from being exposed. Further, the outer nonwoven fabric sheet 52 having a good texture covers the edges thereof, thereby improving the texture and appearance.

As shown in fig. 3 to 6, in the present embodiment, each of the

coupling members

40A and 40B on the front and rear sides of the disposable diaper preferably has one or more coupling portion stretchable members 46 arranged along the folded-up portion 41. The coupling portion stretchable member 46 is an elastic stretchable member such as a string-like elastic rubber, and is disposed in the folded-up portion 41 in an extended state along the width direction of the disposable diaper. As described above, since each of the

coupling members

40A and 40B is formed by laminating the leakproof sheet 51 and the outer nonwoven sheet 52, the coupling stretchable member 46 may be fixed between the leakproof sheet 51 and the outer nonwoven sheet 52. By disposing the coupling portion stretching member 46 in advance along the folded-up portion 41, a gap is less likely to be generated between the intermediate region 43 of each

coupling member

40A, 40B and each

exterior body

10, 20 by the contraction action of the coupling portion stretching member 46. Therefore, the appearance of the diaper is improved, and the fit is also improved.

As shown in fig. 1 and 2, in each of the connecting

members

40A and 40B, a plurality of lower abdomen (tubular) stretchable members 47 extending in the width direction are disposed at predetermined intervals in the longitudinal direction of the disposable diaper. The lower abdomen stretch member 47 is fixed to each of the

coupling members

40A and 40B in an extended state in the width direction of the disposable diaper. However, the lower abdomen stretching member 47 is not disposed at the center in the width direction of each of the connecting

members

40A and 40B, or is partially cut, for example, so as not to exhibit stretchability. That is, the lower abdomen stretching members 47 are substantially positioned on both sides in the width direction of the absorbent body 30. The lower abdomen stretch member 47 may be partially overlapped on both ends in the width direction of the absorbent main body 30. Each lower abdomen stretchable member 47 may be fixed between the leakproof sheet 51 and the outer nonwoven sheet 52 in the same manner as the coupling part stretchable member 46 described above. When the lower abdomen contracting member 47 contracts, the connecting

members

40A and 40B contract to form a plurality of thin creases (lower abdomen creases).

[ 1 st modification ]

Next, a 1 st modification of each of the

coupling members

40A and 40B will be described with reference to fig. 7. Fig. 7 is an enlarged sectional structure view of the rear connecting member 40B, but the structure of the rear connecting member 40B described here is also applicable to the front connecting member 40A.

As shown in fig. 7, the rear connecting member 40B has an inner nonwoven fabric sheet 53 in addition to the configuration shown in fig. 6 and the like. The inner nonwoven fabric sheet 53 is a member to be bonded to the skin-facing surface of the leakproof sheet 51. The inner nonwoven fabric sheet 53 is a sheet member mainly composed of nonwoven fabric, and is disposed to improve the skin touch of the skin-facing surface of the leakproof sheet 51. The nonwoven fabric used here is not particularly limited, but like the outer nonwoven fabric sheet 52, for example, a breathable nonwoven fabric, a point-bonded nonwoven fabric, a spunbonded nonwoven fabric, an air-laid nonwoven fabric, a meltblown nonwoven fabric, an SMS nonwoven fabric, an SMMS nonwoven fabric, and the like can be cited. Basically, the inner nonwoven fabric sheet 53 is a sheet member having liquid permeability and air permeability and good tactile sensation to the skin. In the example shown in fig. 7, the inner nonwoven fabric sheet 53 is directly joined to the non-skin-facing surface of the rear outer body 20.

Like the outer nonwoven sheet 52, the inner nonwoven sheet 53 extends in the longitudinal direction toward the waist opening 5 side than the leakproof sheet 51, and covers the upper edge 51a of the leakproof sheet 51. Specifically, the inner nonwoven fabric sheet 53 has an upper extension 53a extending beyond the upper edge 51a of the leakproof sheet 51 at the joining portion 44a of the inner region 44 of the rear connecting member 40B. As described above, the outer nonwoven fabric sheet 52 also has the upper extending portion 52 a. Therefore, there is a region where the upper extending portion 53a of the inner nonwoven fabric sheet 53 overlaps the upper extending portion 52a of the outer nonwoven fabric sheet 52, and the upper extending

portions

52a, 53a of the two are joined to each other in this region. The upper extension 53a of the inner nonwoven fabric sheet 53 is only required to have the entire length P of the joint portion 44a to the inner region 44₁The length Q of the leakage preventive sheet 51 at the joint portion 44a₁And the length R of the upper extension 53a of the inner nonwoven fabric sheet 53₁The outer nonwoven fabric sheet 52 may be provided to the same extent.

Further, similarly to the outer nonwoven sheet 52 described above, the inner nonwoven sheet 53 extends in the longitudinal direction toward the crotch portion 3 side than the leakproof sheet 51, and covers the lower edge 51b of the leakproof sheet 51. Specifically, the inner nonwoven fabric sheet 53 has a lower extension 53B extending beyond the lower edge 51B of the leakproof sheet 51 at the joint 45a of the outer region 45 of the rear connecting member 40B. As described above, the outer nonwoven fabric sheet 52 also has the lower extending portion 52 b. Therefore, there is a region where the lower extending portion 53b of the inner nonwoven fabric sheet 53 overlaps the lower extending portion 52b of the outer nonwoven fabric sheet 52, and in this region, both the lower extending

portions

52b, 53b are joined to each other.The lower extension 53b of the inner nonwoven fabric sheet 53 is only required to have the entire length P of the joint portion 45a to the outer region 45₂The length Q of the leakage preventive sheet 51 positioned at the joint portion 45a₂And the length R of the lower extension 53b of the inner nonwoven fabric sheet 53₂The outer nonwoven fabric sheet 52 may be provided to the same extent as described above.

[ 2 nd variation ]

Next, a 2 nd modification of each of the

coupling members

40A and 40B will be described with reference to fig. 8. The structure of the rear connecting member 40B described here is also applied to the front connecting member 40A. As shown in fig. 8, the rear connecting member 40B has an outer nonwoven fabric sheet 52 bonded to the leakproof sheet 51 and the non-skin-facing surface thereof. However, in the example of fig. 8, the outer nonwoven sheet 52 is folded back at the upper edge 51a and the lower edge 51b of the barrier sheet 51 and joined to the non-skin-facing side of the barrier sheet 51. In this way, the outer nonwoven fabric sheet 52 is configured to cover not only the non-skin-facing surface but also the skin-facing surface of the leakproof sheet 51.

In the example of fig. 8, the upper extending portion 52a of the outer surface nonwoven fabric sheet 52 folded back at the upper end edge 51a of the leakage preventive sheet 51 has an extending length reaching the non-skin-facing surface of the absorbent body 30, and is joined to the non-skin-facing surface of the absorbent body 30. In this way, the leakage preventive sheet 51 is prevented from contacting the skin of the wearer by the outer nonwoven sheet 52, since the upper extending portion 52a of the outer nonwoven sheet 52 extends to the non-skin-facing surface of the absorbent body 30. That is, the extending portion of the outer nonwoven fabric sheet 52 folded back to the non-skin-facing side of the absorbent body 30 functions as the inner nonwoven fabric sheet 53 shown in variation 1 (fig. 7). In the variation 2 (fig. 8), the outer surface nonwoven fabric sheet 52 and the inner surface nonwoven fabric sheet 53 can be formed as an integral sheet member, and therefore, compared with the variation 1 (fig. 7), there is an advantage that the number of components of the connecting

members

40A and 40B can be reduced.

[ variation 3 ]

Next, a 3 rd modified example of the disposable diaper will be described with reference to fig. 9. In the modification 3, in a state where the

coupling members

40A and 40B are folded toward the folded-up portion 41 and the folded-down portion 42, the notched portions 4a are formed in the side sealing portions 4 located on both sides in the width direction at portions overlapping the intermediate region 43, the inner region 44, and the outer region 45 of the coupling members in the thickness direction. A cutout 4a is formed in the side seal 4 at the portion where the intermediate region 43, the inner region 44, and the outer region 45 overlap, and a hole communicating the inside of the diaper from the cutout 4a is formed. Since the holes communicating with the inside are provided, the ventilation of the inside of the diaper is improved at the hole portions. Then, a finger can be inserted into the notch 4 a. Therefore, when the disposable diaper is worn, the tuck is easily unfolded by inserting a finger into the notch 4a and separating the joining region 43a of each of the

coupling members

40A and 40B. In addition, although the underpants type disposable diaper 100 shown in fig. 9 is intended to peel off the side seals 4 when it is discarded, the operation of peeling off the side seals 4 when it is discarded is made easier because fingers can be inserted into the notches 4 a.

In the above description, in order to express the contents of the present invention, the description of the embodiments of the present invention has been made with reference to the drawings. However, the present invention is not limited to the above-described embodiments, and various modifications and improvements that can be easily conceived by the person skilled in the art based on the matters described in the present specification should be included.

Industrial applicability of the invention

The present invention is applicable to disposable diapers of the pants type or the belt type. Thus, the invention is suitable for use in disposable diaper manufacturing.

Description of the reference numerals

1 precursor

2 the back of the body

3 crotch part

4 side sealing part

4a notch part

5 waist opening

6 leg opening part

10 front body outer package

11 inner sheet

12 outer sheet

13 waist telescopic member

20 rear body outer package

21 inner sheet

22 outer sheet

23 waist telescopic member

30 absorbent body

31 absorbent body

32 topsheet

33 Back sheet

34 cover sheet

35 side sheet

36 stereo corrugated telescopic member

37 leg telescopic member

40 connecting part

40A front side connecting member

40B rear side connecting member

41 upward folding part

42 downward folded part

43 middle region

43a bonding region

43b non-bonded area

44 inner side area

44a junction site

45 outer region

45a joint part

46 connecting part expansion member

47 lower abdomen expansion member

51 leakproof sheet

51a upper end edge

51b lower end edge

52 outer surface nonwoven fabric sheet

52a upper side extension part

52b lower extension

53 inner surface non-woven fabric sheet

53a upper extension

53b lower extension

100 disposable diaper

Claims

1. A disposable diaper comprising: a front body outer cover (10) positioned on the abdomen side of a wearer; a rear body outer cover (20) positioned on the back side of the wearer; and an absorbent body (30) located in the crotch of the wearer, characterized in that:

the absorbent body (30) is connected to the front body outer cover (10) and/or the rear body outer cover (20) via a connecting part (40) having an upward folded part (41) and a downward folded part (42) extending in the width direction of the disposable diaper,

the connecting part (40) is formed by laminating a leakage-proof sheet (51) and an outer non-woven fabric sheet (52) positioned on the non-skin-facing side of the leakage-proof sheet (51) in the thickness direction,

the outer surface nonwoven sheet (52) extends in the longitudinal direction of the disposable diaper beyond the end edge of either or both of the upper end edge (51a) and the lower end edge (51b) of the leakproof sheet (51).

2. The disposable diaper of claim 1,

the connecting part (40) has an intermediate region (43) between the upward folded part (41) and the downward folded part (42),

wherein the intermediate region (43) has a joining region (43a), and the joining region (43a) is joined to either or both of a portion facing the skin surface side and a portion facing the non-skin surface side of the intermediate region (43) in a peelable or non-peelable manner in a state where the connecting portion (40) is folded in the folded-up portion (41) and the folded-down portion (42).

3. Disposable diaper according to claim 1 or 2,

the connecting part (40) is further laminated with an inner non-woven fabric sheet (53) positioned on the skin-facing side of the leakage-proof sheet (51) in the thickness direction,

wherein the inner nonwoven fabric sheet (53) extends in the longitudinal direction of the disposable diaper beyond the end edge of either or both of the upper end edge (51a) and the lower end edge (51b) of the leakproof sheet (51).

4. Disposable diaper according to claim 1 or 2,

the outer nonwoven sheet (52) is folded back toward the skin-facing side of the leakproof sheet (51) beyond the edge of either or both of the upper edge (51a) and the lower edge (51b) of the leakproof sheet (51).