TW201733548A - Disposable diaper - Google Patents

Abstract

To increase ventilation in an area where a tuck is formed in a disposable diaper separated into a front panel outer body, a rear panel outer body, and an absorbent body. A disposable diaper equipped with a front panel outer body (10), a rear panel outer body (20), and an absorbent body (30), wherein: the absorbent body (30) is connected, via a connecting part (40) having a peak fold (41) and a valley fold (42) that extend in the widthwise direction of the diaper, to the front panel outer body (10) and/or the rear panel outer body (20); the absorbent body (30) has a non-joined section (30a) that is not joined to the skin-facing surface of the connecting part (40) at the end section in the lengthwise direction of the diaper, and a joined section (30b) that is joined to the skin-facing surface of the connecting part (40) on the crotch-side of the non-joined section (30a) in the lengthwise direction.

Description

Disposable diaper

The present invention relates to a disposable diaper that is worn on the wearer's lower jaw to absorb and retain liquid such as urine.

Traditionally, disposable diapers having a plurality of live pleats formed in the back body are well known. For example, in the disposable diaper disclosed in Patent Document 1, the pleats are formed by folding the sheet members constituting the back body along the upward fold line and the downward fold line. The pleats can be deployed in the up and down direction in conjunction with the extension of the wearer's back when the wearer leans forward. Therefore, it is possible to prevent the back body of the diaper from being displaced toward the lower jaw portion of the wearer and being relaxed in the vicinity of the lower jaw portion, and it is possible to prevent the wearer's back from being exposed due to the length of the post-identity, or A gap between the disposable diaper and the wearer's back.

[Previous Technical Literature] [Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open Publication No. 2012-239555

As described above, by forming a plurality of active pleats in the back body of the disposable diaper, the diaper can be adjusted to conform to the stretching of the wearer's body, thereby improving the fit or wearing feeling of the diaper. However, since the pleats are formed by folding the sheet members constituting the back body, the air permeability of the overlapping portions of the sheet members is lowered, so that moisture is retained between the wearer's skin and the diaper, and is worn by the wet suffocation. The user brings a sense of pleasure. Further, when the number of the live pleats is plural, there is a problem that the air permeability is remarkably lowered.

Therefore, the object of the present invention is to improve the air permeability of the active pleat formation portion in the disposable diaper which is separated into the front body exterior body, the rear body exterior body, and the absorbent body.

The present invention relates to a disposable diaper. The disposable diaper of the present invention comprises a front outer body 10 on the wearer's abdomen side, a rear body outer body 20 on the wearer's back side, and an absorbent body 30 on the wearer's lower jaw. The present invention is applicable to any of a pant type disposable diaper and a belt type disposable diaper. The pull-on disposable diaper, the front outer body 10 and the rear outer body 20 are joined to each other by a side sealing portion provided on the right and left sides in the width direction of the disposable diaper, and are connected in a substantially annular shape and formed to be positioned. The wearer surrounds the waist opening portion of the tummy portion and the type of the leg opening portion of the wearer surrounding the two leg portions. In the belt-type disposable diaper, a pair of left and right fixing belts are attached to both end portions in the width direction of the outer casing of the front outer casing 10 and the rear outer casing 20, and the fixing belt is fixed by A type that is fixed to the outer casing of the other side and is attached to the lower jaw of the wearer.

The absorbent main body 30 is coupled to the outer casing of either or both of the front outer casing 10 and the rear outer casing 20 via the connecting portion 40, and the connecting portion 40 has a width extending in the width direction of the disposable diaper. The upper folded portion 41 and the downward folded portion 42. The term "upwardly folded portion" as used herein refers to a folded portion that is convex upward in the wearing state, and the "downwardly folded portion" refers to a folded portion that is convex downward in the wearing state. Further, the connecting portion 40 may be a separate member separated from the front outer body 10, the rear body outer body 20, and the absorbent body 30, or may be a member integrated with the absorbent body 30, or may be A member that is integral with the outer body. In addition, in the present specification, the term "outer body" means either or both of the front body exterior body 10 and the rear body exterior body 20.

According to the above configuration, by providing the connecting portion 40 between the absorbent main body 30 and the exterior bodies 10 and 20, the pleats are formed in the connecting portion 40, so that the air permeability of the portion where the pleats are provided can be improved.

Furthermore, in the present invention, the absorbent main body 30 has a non-joining portion (30a) whose end portion in the longitudinal direction is not joined to the skin-facing surface of the joint portion (40); and the joint portion (30b) is more than the non-joining portion The joint portion (30a) is joined to the skin-facing surface of the joint portion (40) on the lower side of the crotch portion in the longitudinal direction. More specifically, the absorbent main body 30 is not joined to the joint portion 40 in the entire width direction region of the longitudinal end portion, but is separated from the skin facing surface of the joint portion 40. This portion is the "non-joining portion 30a". On the other hand, the absorbent body 30 is at least partially joined to the skin-facing surface of the joint portion (in other words, comprehensive or local) in a region on the lower crotch portion side of the disposable diaper from the non-joining portion 30a. The portion where the absorbent main body 30 is joined to the joint portion 40 is the "joining portion 30b". Further, in the present invention, the absorbent body 30 and the joint portion 40 belong to the respective members.

As described above, in the present invention, since the connecting portion 40 is formed with the active pleats, the portion of the disposable diaper in which the pleats are not formed is formed with the pleats, and the air permeability is inferior. Therefore, according to the above configuration, by causing the longitudinal end portion of the absorbent main body 30 to be separated from the connecting portion 40, a gap can be easily generated between the end portion of the absorbent main body 30 and the connecting portion 40, so that the air permeability in the vicinity of the living pleats is obtained. Can be improved. According to this configuration, even when the coupling portion 40 is formed with the pleats and can be deployed as needed, the moisture remaining in the vicinity of the pleats can be efficiently discharged, and the wet suffocation can be suppressed.

In the disposable diaper of the present invention, the absorbent body 30 preferably has an elastically stretchable member that is fixed in an elongated state in the longitudinal direction. In this manner, by fixing the elastically stretchable member to the non-joining portion 30a at the end portion in the longitudinal direction of the absorbent body 30 in an elongated state, the elastically stretchable member can function to roll up the non-joining portion 30a. The non-joining portion 30a of the absorbent body 30 is separated from the joint portion 40. Therefore, a gap is easily generated between the non-joining portion 30a of the absorbent main body 30 and the connecting portion 40, and the air permeability is maintained in a good state.

In the disposable diaper of the present invention, the elastically stretchable member preferably extends from the non-joining portion 30a to the joint portion 30b. In this manner, since the elastically stretchable member that is elongated in the longitudinal direction is fixed to the non-joining portion 30a and the joint portion 30b, the contraction force of the elastically stretchable member can be made to function, so that the non-joined portion 30a is joined from the joint portion. The 30b side is rolled up. Therefore, compared with the case where the elastically stretchable member is fixed only to the non-joining portion 30a, the manner in which the elastically stretchable member is fixed to the non-joining portion 30a and the joint portion 30b can more effectively separate the non-joining portion 30a of the absorbent body 30 from the joint. Department 40.

In the disposable diaper of the present invention, the elastically stretchable member may extend over the entire lengthwise region of the absorbent body 30 beyond the non-joining portion 30a and the joint portion 30b. In this case, the elastically stretchable member may also be at least partially free of stretchability at the joint portion 30b. For example, the elastically stretchable member located at the joint portion 30b may be partially cut, or the elastically stretchable member may be locally stretched in the unstretched state to the joint portion 30b, so that the elastically stretchable member does not exhibit stretchability. Here, the elastically stretchable member extending over the entire longitudinal direction region of the absorbent body 30 can be used (used) in a manner to be described later (the use), the three-dimensional gather elastic member 36 or the leg stretch member 37. However, when the three-dimensional gather elastic member 36 or the leg stretch member 37 has stretchability in the entire longitudinal direction region of the absorbent body 30, the absorbent body 30 is greatly bent in the lower jaw portion, which may impair the feeling of fit. Therefore, as described above, the elastic force of the elastically stretchable member is partially broken at the joint portion 30b of the absorbent body 30, whereby the fit of the absorbent body 30 is maintained, and the non-joining of the absorbent body 30 can be maintained. The roll of the portion 30a acts.

In the disposable diaper of the present invention, the joint portion 40 has an intermediate portion 43 between the upwardly folded portion 41 and the downwardly folded portion 42. In the state in which the above-mentioned upwardly folded portion 41 and the downwardly folded portion 42 are folded, the intermediate portion 43 has a joint portion 43a which is detachably or non-detachably joined to the intermediate portion 43. A part facing either or both of the surface facing the skin surface side and the surface facing the skin side surface. Further, the intermediate portion 43 is bonded not only to the portion facing the skin surface side but also to the portion facing the skin surface side in the joint region 43a. Moreover, the joint region 43a may cover the entire region of the intermediate portion 43, but in this case, the joint region 43a releasably joins the intermediate portion 43 to its facing portion (i.e., temporary joint). Further, the joint region 43a may also join the intermediate portion 43 to the facing portion thereof in a non-releasable manner, but in this case, the joint region 43a is partially disposed in the intermediate portion 43. Further, when the joint region 43a is provided at a portion of the intermediate portion 43, the other regions are referred to as the non-joining region 43b. Further, in the pant-type disposable diaper, the so-called side seal portion 4 functions as a joint region 43a as referred to herein.

According to the present invention, in the disposable diaper which is separated into the front body exterior body, the rear body exterior body, and the absorbent body, the air permeability of the active pleat formation portion can be improved.

1‧‧‧Predecessor

2‧‧‧ Back body

3‧‧‧Lower Department

4‧‧‧Side sealing department

5‧‧‧Lumbar opening

6‧‧‧ leg opening

10‧‧‧Predecessor body

11‧‧‧Inner film

12‧‧‧ External film

13‧‧‧Lumbar telescopic member

20‧‧‧Back body

21‧‧‧ inner film

22‧‧‧ outside film

23‧‧‧Lumbar telescopic member

30‧‧‧Absorbable ontology

30a‧‧‧non-joined parts

30b‧‧‧ joints

31‧‧‧Acceptor

32‧‧‧Upper film

33‧‧‧ Back film

34‧‧‧ Cover

35‧‧‧ side film

35a‧‧‧Outside retraction

35b‧‧‧Fixed Department

35c‧‧‧Inside retraction

36‧‧‧Three-dimensional pleated telescopic members

37‧‧‧ leg flexure members

40‧‧‧Connecting Department

40A‧‧‧ front side joint member

40B‧‧‧Back side joint member

41‧‧‧Upward folding

42‧‧‧Folding section

43‧‧‧Intermediate area

43a‧‧‧ joint area

43b‧‧‧non-joined area

44‧‧‧ inside area

44a‧‧‧ joints

45‧‧‧Outer area

45a‧‧‧ joints

46‧‧‧Connecting section telescopic members

47‧‧‧lower abdomen expansion member

51‧‧‧ leakproof film

52‧‧‧Outer film

100‧‧‧Disposable diapers

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

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

Fig. 3 is a longitudinal sectional view showing a disposable diaper according to an embodiment of the present invention.

Fig. 4 is a view schematically showing a state in which the live pleats are unfolded from the state shown in Fig. 3.

Fig. 5 is an external perspective view showing a state in which a live pleat is unfolded from the state shown in Fig. 1.

Fig. 6 is an enlarged longitudinal sectional view showing the essential part of the longitudinal section of Fig. 3 in an enlarged manner.

Fig. 7(a) is a plan view of the absorbent body, and Fig. 7(b) is a longitudinal cross-sectional structural view of the absorptive body taken along the line VII-VII.

Fig. 8 is a cross-sectional structural view of an absorbent body taken along line VIII-VIII of Fig. 7(a).

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 be appropriately changed from the following aspects in view of the above-described embodiments.

In the present specification, the term "longitudinal direction" refers to the front-rear direction of the disposable diaper, and refers to the direction in which the front and back of the disposable diaper are connected. Further, the term "width direction" means a direction orthogonal to the longitudinal direction on a plane. In the illustration of the present case, 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 "face to face" refers to the face of the wearer's skin in the wearing state of the disposable diaper. In addition, the term "non-facing to the skin" means that the surface of the disposable diaper is not facing the surface of the wearer's skin, that is, the side opposite to the surface facing the skin.

In the present specification, the term "A to B" means "A or more B or less".

[outer body and absorbent body]

Fig. 1 is a perspective view showing the appearance of a disposable diaper according to an embodiment of the present invention. 2 is a developed view of the disposable diaper shown in FIG. 1, which shows a state in which the diaper is viewed from the side facing the skin surface. 3 is a longitudinal cross-sectional view of the disposable diaper shown in FIG. 1, which is a cross-sectional structure taken along line III-III of FIG. In the present specification, the description of the present invention will be made by taking the case where the present invention is applied to a pant-type disposable diaper. However, the present invention is not limited to the use of a pant type disposable diaper, and can also be applied to a belt type disposable diaper.

As shown in FIGS. 1 to 3, the disposable diaper 100 of the present invention is divided into a front body 1 that contacts the wearer's abdomen, a back body 2 that contacts the back of the wearer, and a front body in the longitudinal direction (Y-axis direction). 1 and the lower jaw 3 between the back body 2. In the present embodiment, the front body exterior body 10 is located in the front body 1, and the rear body exterior body 20 is located in the back body 2. Further, the absorbent body 30 is located at the lower jaw portion 3. The absorbent body 30 extends in the longitudinal direction by joining the front body 1 and the back body 2 with the crotch portion 3 as a center. Therefore, in the absorbent body 30, the end portion on the side of the front body 1 is overlapped with the front outer body 10 in the thickness direction. On the other hand, the end portion on the side of the back body 2 is overlapped with the rear body exterior body 20 in the thickness direction. In the present invention, the front body exterior body 10, the rear body exterior body 20, and the absorbent body 30 are basically constituted by separate bodies. In the present embodiment, each of the exterior bodies 10 and 20 is formed in a substantially rectangular shape having a long width in a plan view. Further, the absorbent body 30 is formed in a substantially rectangular shape having a long longitudinal direction in plan view. However, each of the exterior bodies 10, 20 and the absorbent article The shape of the body 30 is not limited to the illustrated form, and can be appropriately changed within a range in which the function of the present invention can be exerted.

Further, the front end outer casing 10 and the left and right end portions of the rear outer casing 20 in the width direction (X-axis direction) are provided with side surface sealing portions 4. In the side seal portion 4, the portions facing the left and right ends of the front outer casing 10 and the rear outer casing 20 are joined to each other. The bonding method may be, for example, a conventional method such as heat sealing, ultrasonic sealing, or adhesion using a hot melt adhesive or the like. As shown in Fig. 1, the front outer casing 10 and the rear outer casing 20 are joined to each other at the side sealing portion 4, and the outer casings 10, 20 are connected in a ring shape. Further, the waist opening portion 5 is defined by the front outer casing 10 and the upper edge of the rear body exterior body 20. Further, from the lower end portion of the front outer casing 10 to the lower end portion of the rear outer casing 20, the absorbent main body 30 is disposed to be laid. Therefore, the right and left leg opening portions 6 can be defined by the left and right side edges of the absorbent body 30 and the lower edges of the outer casings 10, 20. The wearer can wear the pant-type disposable diaper 100 by penetrating the two legs from the waist opening portion 5 and extending one foot from the left and right leg opening portions 6.

As shown in Fig. 3, each of the exterior bodies 10, 20 includes: inner sheets 11, 21 on the skin-facing side; outer sheets 12, 22 on the non-facing side; and between the inner and outer sheets One or more waist elastic members 13, 23. When the plurality of the waist elastic members 13 and 23 are plural, they are arranged to be spaced apart from each other by a predetermined interval in the longitudinal direction. Each of the waist elastic members 13 and 23 is sandwiched and fixed between the inner sheets 11 and 21 and the outer sheets 12 and 22 while being stretched in the diaper width direction. For example, a hot melt adhesive or the like is directly applied to the stretched waist elastic members 13 and 23, and the member coated with the adhesive is disposed on the inner sheets 11, 21 and the outer sheets 12, 22. Just between. In this way, when the waist elastic members 13 and 23 are contracted, the inner sheets 11, 21 and the outer sheets 12, 22 are wrinkled to form a plurality of fine wrinkles (waist gathers). The number of the arrangement of the waist elastic members 13 and 23 is not particularly limited, but is preferably, for example, 3 to 20 or 4 to 15.

The sheet member forming the inner sheets 11 and 21 and the outer sheets 12 and 22 can be made of a conventional product, and is not particularly limited, but is preferably formed of a non-woven fabric having a good touch. Examples of the non-woven fabric include hot air non-woven fabric, point fusion non-woven fabric, non-woven fabric nonwoven fabric, air-flow non-woven fabric, melt-blown non-woven fabric, SMS non-woven fabric, and SMMS non-woven fabric. Further, the waist elastic members 13 and 23 can utilize a conventional elastically stretchable member, but are preferably applied, for example, as a thread-like elastic rubber. As such a rubber material, a styrene rubber, an olefin rubber, an urethane rubber, an ester rubber, a polyurethane, a polyethylene, a polystyrene, a styrene butadiene, an anthrone, or the like may be used. Polyester and other materials.

Further, as shown in FIG. 3, the outer sheets 12, 22 may be extended upward in the longitudinal direction from the inner sheets 11, 21, and the extended portion may be folded back toward the end edge of the waist opening portion 5. Skin side, and Engaged on the skin facing surface of the inner sheets 11, 21. In this way, the skin of the waist opening 5 can be softened.

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 covering of the absorbent body 31. A liquid-impermeable back sheet 33 that is not facing the skin. The upper piece 32 and the back piece 33 are joined to each other at the peripheral edge portion of the absorber 31. The bodily fluid discharged from the wearer's lower jaw passes through the upper sheet 32 to the absorbent body 31, and is prevented from leaking to the outside by the back sheet 33.

The absorber 31 is an element for absorbing body fluid such as urine and holding the absorbed body fluid. The absorber 31 is usually formed by coating an absorbent material with a chip coated on a face paper or the like. The absorbent material constituting the absorbent body 31 can be a conventional material. The absorbent material may be, for example, a fluff pulp, a superabsorbent polymer, or a hydrophilic sheet. In addition, the absorbent material may be used alone or in combination of two or more kinds in the fluff pulp, the superabsorbent polymer, or the hydrophilic sheet. Absorbent materials are generally useful as mat-like articles that form a single or multiple layers. The shape of the absorbent body 31 can be appropriately designed in accordance with the shape, size, and use of the disposable diaper. For example, the shape of the absorbent body 31 may be an hourglass type as shown in Fig. 2, or may be a rectangular shape, a circular shape, or a gourd type which is generally used.

The upper sheet 32 is an element that directly contacts the skin of the wearer's lower jaw, thereby allowing body fluid such as urine to penetrate into the absorbent body 31. Therefore, the upper sheet 32 is made of a highly flexible liquid permeable material. In addition, in the present specification, the term "liquid permeability" means, for example, a property in which water is permeable when less than 1 minute of pouring water of 5 ml of normal temperature on a sample under standard atmospheric pressure. Further, examples of the liquid permeable material constituting the top sheet 32 are woven fabric, non-woven fabric, or porous film. Further, for example, a fiber of a thermoplastic resin such as polypropylene or polyethylene, polyester, or nylon may be subjected to a hydrophilization treatment to obtain a nonwoven fabric.

The back sheet 33 is an element that prevents body fluid that has passed through the upper sheet 32 and is absorbed by the absorber 31 from leaking to the outside. Therefore, the back sheet 33 is composed of a liquid-impermeable material. In the present specification, the term "liquid-impermeable property" means, for example, a property in which water is not impregnated even when subjected to a bath of 5 ml of normal temperature at a standard atmospheric pressure for 1 minute or more. An example of the liquid-impermeable material constituting the back sheet 33 is a plastic film made of a polyethylene resin or the like. In particular, the back sheet 33 is preferably a microporous polyethylene film formed with a plurality of fine pores of 0.1 to 4 μm.

Further, in addition to the above configuration, the absorbent body 30 also has a cover sheet 34 on the non-facing side of the back sheet 33. In order to cover the back sheet 33 and improve its hand, the cover sheet 34 is attached to the back sheet 33. Non-facing to the skin. The material constituting the cover sheet 34 may be a woven cloth or a non-woven fabric. In particular, the material constituting the cover sheet 34 is preferably a non-woven fabric or a wet non-woven fabric made of a thermoplastic resin such as polyethylene, polypropylene or polyester.

Further, in addition to the above configuration, the absorbent body 30 further has members for constituting the three-dimensional gathers. The three-dimensional pleats are a pair of side panels 35 disposed along the left and right side edges of the absorbent body 31 and having water repellency, and one or more three-dimensional pleated telescopic members disposed at the inner end edges of the side panels 35 in the width direction. 36 constitutes. The side panel 35 has a fixing portion that is fixed to the skin-facing surface of the upper sheet 32 in the longitudinal direction, and a free end portion that is located further inside than the fixing portion in the width direction and that is not fixed to the upper sheet 32. Further, the free end portion of the side panel 35 is fixed to the three-dimensional gather elastic member 36 in an elongated state in the longitudinal direction. Therefore, when the three-dimensional pleated telescopic member 36 is contracted, the free end portion of the side panel 35 is erected to form a three-dimensional gather due to its contraction force. The three-dimensional gathers formed in this manner are erected along both side edges of the absorbent body 31, and function as a leakage preventing wall for preventing lateral leakage of body fluid excreted by the wearer.

Further, in addition to the above configuration, the absorbent body 30 further has a leg stretch member 37 along the left and right side edges in the width direction of the absorbent body 30. The leg stretchable member 37 is fixed to the non-facing surface of the side panel 35, for example, in a state of being elongated in the longitudinal direction. When the leg stretch member 37 is contracted, the side panel 35 is wrinkled to form a plurality of fine pleats (leg gathers).

[Link Department]

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

Further, as shown in the cross-sectional view of Fig. 3, in the present embodiment, the front side connecting member 40A, the front body exterior body 10, and the absorbent body 30 are separate body members. Similarly, the rear side connecting member 40B, the rear body outer body 20, and the absorbent body 30 are also separate body 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, and similarly, the rear side connecting member 40B (connecting portion 40) may be formed outside the back body. The body 20 is a one-piece member.

As shown in FIG. 2 and FIG. 3, the respective connecting members 40A and 40B on the front side and the rear side are disposed on the non-facing surface side of each of the exterior bodies 10 and 20 and the absorbent main body 30, and are formed in the width direction. The bodies 10, 20 have substantially the same width. In the present embodiment, each of the connecting members 40A and 40B is formed in a substantially rectangular shape that is long in the width direction in plan view. Each of the connecting members 40A and 40B overlaps with a part of each of the exterior bodies 10 and 20 in the longitudinal direction, and the both ends of the connecting members 40A and 40B in the width direction are applied to the portions other than the overlapping portion. Side sealing. In other words, the left and right end portions in the width direction of each of the connecting members 40A and 40B are provided with side sealing portions 4 at portions other than the outer casings 10 and 20 and the overlapping portions. Further, in the both end portions in the width direction of each of the exterior bodies 10 and 20, portions other than the respective connecting members 40A and 40B and the overlapping portion are used as the side sealing portion 4, and the front side connecting member 40A and the rear side are provided. The connecting member 40B is joined to the right and left side sealing portions 4 to form a pant type.

As shown in FIG. 3, each of the connecting members 40A and 40B is folded into a substantially N-shaped cross section, and the region facing the skin surface side is joined to each of the exterior bodies 10 and 20 at the upper end of each of the connecting members 40A and 40B. In the lower end of each of the connection members 40A and 40B, the region facing the skin surface side is joined to the absorbent body 30. Specifically, the connecting members 40A and 40B have an upwardly folded portion 41 that is convex upward in the wearing state, and a downwardly folded portion 42 that is convex downward in the wearing state. In the present embodiment, when the upwardly folded portion 41 is compared with the downwardly folded portion 42, the opposing portion is formed, the upwardly folded portion 41 is positioned on the non-facing surface side, and the downwardly folded portion 42 is positioned on the skin facing side. The upwardly folded portion 41 and the downwardly folded portion 42 linearly extend in the width direction of each of the coupling members 40A and 40B. Therefore, by folding along the upwardly folded portion 41 and the folded down portion 42, the respective connecting members 40A and 40B have a substantially N-shaped cross section, and are formed to include a portion laminated in three layers. In the present specification, the structure of each of the connecting members 40A and 40B that can be folded along the upwardly folded portion 41 and the folded down portion 42 is referred to as "live pleats". In the present embodiment, each of the connecting members 40A and 40B has a substantially N-shaped cross section. However, the present invention is not limited thereto, and may have a structure in which the cross section is substantially inverted N-shaped or has a plurality of pleats.

Further, as shown in FIG. 3, each of the coupling members 40A and 40B is divided into an intermediate portion 43, an inner region 44, and an outer region 45 with the upwardly folded portion 41 and the downwardly folded portion 42 as boundary lines. The intermediate portion 43 is located in a region between the upwardly folded portion 41 and the downwardly folded portion 42. Further, the inner region 44 extends from the downwardly folded portion 42 to the outer casings 10 and 20 to the upper side, and has a region joined to the non-surface-facing joint portion 44a of the outer casing. Further, in the example of Fig. 3, the entire area of the inner region 44 is formed as the joint portion 44a, but the inner portion 44 may be joined to each of the outer casings 10, 20 by at least a portion. Further, the outer region 45 is a region that extends from the upwardly folded portion 41 toward the absorbent body 30 side and has a joint portion 45a that is joined to the non-facing surface side of the absorbent body 30. In addition, the example of Figure 3 The outer region 45 is a portion of the lower end side (the lower jaw side) as the joint portion 45a, but the outer portion 45 may be joined to the absorbent body 30 over the entire area. Each of the joint portions 44a and 45a described herein can be realized by a conventional adhesive such as a hot-melt adhesive, and the joint portion 45a of the outer region 45 overlaps with the joint portion 30b of the absorbent body 30 to be described later.

In the example shown in FIG. 3, the inner region 44 of each of the connecting members 40A and 40B is joined to the non-facing surface of the lower end portion of each of the exterior bodies 10 and 20 in the longitudinal direction. Further, the outer region 45 of each of the coupling members 40A and 40B is joined to the non-facing surface of the upper end portion of the absorbent body 30 in the longitudinal direction. In this manner, each of the connecting members 40A and 40B functions to connect the outer casings 10 and 20 and the absorbent body 30. Here, an example in which the inner region 44 of each of the coupling members 40A and 40B is joined to the lower end side of each of the exterior bodies 10 and 20 is shown. However, the inner region 44 may be joined to the upper end sides of the outer casings 10, 20. The inner region 44 is to be joined to the non-facing surface of each of the outer casings 10, 20, and is freely designed to some extent.

In addition, referring back to FIG. 2, each of the coupling members 40A and 40B is folded in a state in which the upwardly folded portion 41 and the downwardly folded portion 42 are folded. In this state, the intermediate portion 43 has at least a portion of the entire width direction region having the joint portion 43a which is releasably joined to the portion of the intermediate portion 43 facing the skin-facing side. Further, in the example shown in Fig. 2, the joint region 43a is partially formed in the intermediate portion 43, and a portion other than the portion is used as the non-joining region 43b. For example, when the description is made 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 at least the intermediate region 43 is joined to the inner region 44 in the joint region 43a shown in FIG. Further, in the joint region 43a, the intermediate portion 43 may be substituted for the outer region 45 or the absorbent body 30 on the non-facing side thereof, or the intermediate portion 43 may be joined together with the inner region 44. The outer region 45 facing the skin side or the absorbent body 30. In this manner, in the joint region 43a, each of the joint members 40A, 40B is fixed in a folded state to restrict inadvertent unfolding thereof. By separating the joint region 43a, the joint members 40A and 40B can be developed. and also. Fig. 3 is a longitudinal sectional view showing a portion of the non-joining region 43b.

In Fig. 2, a mesh bottom is schematically applied to the joint area 43a for display. In the example shown here, the joint region 43a is disposed in a region in which the respective joint members 40A and 40B and the exterior bodies 10 and 20 are overlapped in the thickness direction, and the joint region 43a is provided in the region where the absorbent body 30 is located. The left and right sides of the width direction do not overlap with the absorbent body 30. That is, in the plan view, each of the exterior bodies (10, 20), the respective connection members (40A, 40B), and the overlapping portion of the absorbent body 30 in the longitudinal direction range is the non-joining region 43b. In this manner, the joint region 43a can also be defined as not overlapping the absorbent body 30. In the range, an area having a certain width in the width direction. However, in the pull-on diaper, the side seal portion 4 itself functions as the joint region 43a. Therefore, in the pull-on diaper, it is not necessary to bond the connecting members 40A and 40B to the outer casings 10 and 20 by a hot-melt adhesive or the like in addition to the side seal portion 4. That is, the joint region 43a displayed in the bottom of the mesh in Fig. 2 can be omitted.

According to the above configuration, the joint portion 40 is provided between the absorbent body 30 and the exterior bodies 10 and 20 by separate body members to form the pleats, and the spreadability of the pleats is improved. That is, when the absorbent main body 30 is stretched, the connecting portion 40 expands the active pleats in accordance with the movement, so that it can be said that the active pleats are easily spread. Then, when the pleats are unfolded, the pleats can be played by clothes worn by the wearer, etc., and the functions of the pleats can be exerted, and the effect of discharging the moisture remaining in the diaper can be expected. Further, when the outer casings 10 and 20 are connected to the absorbent main body 30 by the respective connecting members 40A and 40B, when the respective connecting members 40A and 40B constituting the flaps are unfolded, the outer casings 10 and 20 are caused to be The absorbent body 30 is separated in the longitudinal direction and is elongated toward the longitudinal direction of the disposable diaper. 4 and 5 are schematic views showing that the joint members 43A and 40B are unfolded by peeling off the joint region 43a, and the defined space is expanded by the joint members, and the outer casings 10 are 20 is separate from the absorbent body 30. In this manner, by forming a structure in which the pleats of the respective connecting members 40A and 40B can be expanded as needed, the outer casings 10 and 20 or the absorbent body 30 can be adjusted in accordance with the movement of the wearer, so that Effectively prevent gaps between the wearer's skin and the diaper. Moreover, since the diaper improves the fit of the wearer's skin, the wearing feeling is enhanced. In the case where the joint region 43a is a peelable person, the joint members 43A and 40B can be developed as shown in FIGS. 4 and 5 by peeling the joint region 43a.

Further, as shown in FIG. 2, in a state in which the respective coupling members 40A, 40B are completely folded along the upwardly folded portion 41 and the downwardly folded portion 42, the outer casings 10, 20 cover the longitudinal end portions of the absorbent body 30. It is better for the skin. That is, by the upwardly folded portion 41 (refer to FIG. 3) of each of the joint members 40A, 40B extending in the width direction, the edge of the joint region 43a extending in the longitudinal direction, the intermediate portion 43, and the outer region 45, it is possible to define The space of the downward opening. Further, the longitudinal end portion of the absorbent body 30 can be accommodated in the space. Further, although not shown in the drawings, the longitudinal end portion of the absorbent body 31 constituting the absorbent body 30 may be housed in the space defined herein. According to this configuration, the body fluid or the soft fluid flowing in the longitudinal direction of the absorbent body 30 can be accommodated in the space and can be prevented from leaking to the outside.

Further, the intermediate portion 43 may be joined to the inner region 44 or the outer region 45 in a non-releasable manner at the joint region 43a. In this case, since the intermediate portion 43 is not joined to the portion facing the skin surface side and the non-facing surface side in the non-joining region 43b, each of the connecting members 40A, 40B can be Need to expand freely. In this case, for example, when the wearer starts moving, the pleats of the respective joint members 40A, 40B are unfolded in the non-joining region 43b. When the non-expanded state and the unfolded state of the respective connecting members 40A and 40B are repeatedly presented by the movement of the wearer, the space defined by each of the connecting members is reduced as time passes, and the pleating of each connecting member is made. Part of the function is like a pump, so that the air trapped in the space is continuously discharged. By using the development of the pleats in this manner, it is easy to discharge the moisture remaining in the space of each of the connection members 40A and 40B, and the air permeability of the pleat formation portion can be improved. Further, in the left and right end portions of the connecting members 40A and 40B in the width direction, the overlapping portion and the outer casing may be provided by the side surface sealing except for the portion overlapping the outer casings 10 and 20. 10, 20 together with the side seal synthetic peelable or non-peelable. When the overlapping portion is sealed to the side surface together with the exterior bodies 10 and 20, the joint region 43a can be omitted. Further, the entire lengthwise left and right end portions of the connecting members 40A and 40B in the width direction may be additionally sealed with the outer casings 10 and 20 in a non-detachable side surface.

In this manner, the intermediate portion 43 and the joint region 43a joining the facing portions thereof may be either a peelable temporary joint or a non-peelable joint. The peelable temporary bonding and the non-peelable bonding of the bonding region 43a described herein can be realized by a conventional adhesive such as a hot-melt adhesive, as long as the coating amount or adhesion of the adhesive is adjusted. Releasable or non-peelable. The peelable joint state means that, for example, when peeling is desired in advance, both of them can be peeled off without causing the intermediate portion 43 or the sheet member constituting the facing portion to be cracked or broken. In contrast, the term "non-peelable joint state" means that, for example, if peeling is not previously contemplated, if the peeling is to be performed, the sheet member in the intermediate portion 43 or the facing portion thereof may be cracked or broken. Engaged state. Further, the joint region 43a may cover the entire region of the intermediate portion 43, but in this case, the joint region 43a releasably joins (i.e., temporarily engages) the intermediate portion 43 to the facing portion thereof. Further, the joint region 43a may be joined to the portion facing the intermediate portion 43 in a non-releasable manner, but in this case, the joint region 43a is partially provided in the width direction of the intermediate portion 43.

[Sheet laminated structure of joint portion]

Next, a structure of a sheet member or the like constituting the connecting portion 40 (the connecting members 40A and 40B) will be described with reference to Fig. 6 . Fig. 6 is a view showing an enlarged view of the periphery of the rear side connecting member 40B shown in Fig. 3. Hereinafter, the structure of the rear side connecting member 40B will be described as an example, but the structure of the rear side connecting member 40B described here is also applicable to the front side connecting member 40A.

As shown in FIG. 6, the rear side connecting member 40B has a structure in which at least two members are stacked in the thickness direction. That is, in the example shown in FIG. 6, the rear side connecting member 40B has the leakage preventing sheet 51 and the outer sheet 52 which is bonded to the non-surface-facing side. The leakage preventing sheet 51 is directly joined to the rear body exterior body and the absorbent body 30, and the outer sheet 52 is joined to the non-facing surface of the leakage preventing sheet 51.

The leakage preventing sheet 51 is a liquid-impermeable sheet member and is disposed for the purpose of preventing leakage of body fluid from the rear-side connecting member 40B. Similarly to the back sheet 33, the leakage preventing sheet 51 is preferably a plastic film such as a polyethylene resin. In particular, in order to ensure the air permeability of the rear side connecting member 40B, it is preferable to use a microporous polyethylene film having a plurality of fine pores of 0.1 to 4 μm as the leakage preventing sheet 51. By forming the leakage preventing sheet 51 by the sheet member having air permeability and liquid impermeability, it is possible to prevent the body fluid from reaching the rear side connecting member 40B from leaking, and it is possible to suppress the occurrence of wetness in the portion.

The outer sheet 52 is a sheet member mainly composed of a non-woven fabric, and is disposed for the purpose of improving the feel of the leakage preventing sheet 51 not facing the skin surface. The nonwoven fabric used herein is not particularly limited, and examples thereof include materials such as hot air non-woven fabric, point fusion non-woven fabric, non-woven fabric nonwoven fabric, air-flow non-woven fabric, melt-blown nonwoven fabric, SMS non-woven fabric, and SMMS non-woven fabric. Basically, a sheet member having liquid permeability and air permeability and having a good hand can be used as the outer sheet 52.

Further, as shown in FIGS. 3 to 6, in the present embodiment, each of the connecting members 40A and 40B on the front side and the rear side (the front side and the rear side of the disposable diaper) preferably has one piece disposed along the upward folded portion 41 or A plurality of connecting portion expansion and contraction members 46. The connecting portion telescopic member 46 is an elastically stretchable member such as a wire-like elastic rubber, and is disposed in an upwardly folded portion 41 in an extended state along the width direction of the disposable diaper. As described above, since each of the connecting members 40A and 40B is formed by laminating the leakage preventing sheet 51 and the outer sheet 52, the connecting portion expansion and contraction member 46 may be fixed between the leakage preventing sheet 51 and the outer sheet 52. When the connecting portion expansion and contraction member 46 is disposed along the upwardly folded portion 41, the intermediate portion 43 of each of the connecting members 40A and 40B and the outer casings 10 and 20 are not easily separated by the contraction action of the connecting portion expansion and contraction member 46. A gap is created. Therefore, the appearance of the diaper is improved and the fit is improved.

In addition, as shown in FIG. 1 and FIG. 2, in each of the connection members 40A and 40B, a plurality of tummy extensions extending in the width direction are arranged at predetermined intervals in the longitudinal direction (the longitudinal direction of the disposable diaper). Member 47. The lower abdominal elastic member 47 is fixed to each of the coupling members 40A and 40B in a state of being stretched in the width direction (the width direction of the disposable diaper). However, the lower abdomen telescopic member 47 is not disposed at the center in the width direction of each of the connection members 40A and 40B, or is partially cut so as not to exhibit stretchability. That is, the lower abdomen telescopic member 47 is substantially located at the width of the absorbent body 30. Degrees on both sides. Further, the lower abdomen telescopic member 47 may partially overlap both ends in the width direction of the absorbent body 30. Similarly to the above-described connecting portion telescopic member 46, each of the lower abdomen telescopic members 47 may be fixed between the leakage preventing sheet 51 and the outer sheet 52. When the lower abdomen expansion and contraction member 47 is contracted, the connection members 40A and 40B are contracted to form a plurality of fine pleats (lower abdomen pleats).

[Joining structure of the joint portion and the absorbent body]

Next, the joint structure of the joint portion 40 (the front side joint member 40A, the rear side joint member 40B) and the absorbent body 30 will be described in more detail with reference to FIGS. 6 to 8 . The cross-sectional view of Fig. 6 shows the joint structure of the rear side connecting member 40B and the absorbent body 30. 7(a) is a plan view of the absorbent body 30, and FIG. 7(b) is a longitudinal cross-sectional view of the absorbent body 30 taken along the line VII-VII. In addition, FIG. 8 is a cross-sectional view of the absorbent body 30 taken along line VIII-VIII.

As shown in FIG. 6 and FIG. 7(b), the absorbent body 30 has a non-joining portion 30a that is not joined to the skin-facing surface of each of the connecting members 40A and 40B at the end portion on the side of the waist opening portion 5 in the longitudinal direction. In other words, the non-joining portion 30a of the absorbent main body 30 provided at the end portion in the longitudinal direction is not joined to each of the connecting members 40A and 40B, but is in a separated state. The non-joining portion 30a of the absorbent body 30 may be formed not only in the entire width direction region of the end portion of the absorbent body 30 but only in a portion in the width direction, but in the entire width direction region formed at the end portion of the absorbent body 30. It is better. In this case, the longitudinal end portions of the absorbent body 30 are not joined to the respective exterior bodies 40A, 40B in the entire width direction region. Further, in Fig. 6, in the region of the non-joining portion 30a, the outer sheet 52, the leakage preventing sheet 51, the cover sheet 34, the back sheet 33, the absorbent body 31, and the upper surface are formed from the non-facing surface side to the skin facing side. The sheet 32 is sequentially formed (the front end portion of the absorbent body 31 reaches the non-joining portion 30a region), but the front end portion of the absorbent body 31 from the lower jaw portion 3 side toward the coupling portion 40 side may not reach the non-joining portion 30a. . In other words, the non-joining portion 30a may have a configuration in which the outer sheet 52, the leakage preventing sheet 51, the cover sheet 34, the back sheet 33, and the upper sheet 32 are sequentially present from the non-facing surface side to the skin facing side.

On the other hand, the absorbent main body 30 has a joint portion 30b that is joined to the skin surface of each of the connection members 40A and 40B in a comprehensive or partial manner on the lower crotch portion 3 side in the longitudinal direction of the non-joining portion 30a. The joint portion 30b is preferably formed not only in the entire width direction region of the end portion of the absorbent core 30 but also in a portion in the width direction, but is preferably formed in the entire width direction region of the absorbent body 30. Further, as shown in FIG. 6, among the regions in which the thickness direction absorbent main body 30 overlaps with the respective coupling members 40A and 40B, the regions other than the non-joining portions 30a are integrally joined to the respective connecting members. 40A, 40B is better. In this manner, the absorbent body 30 is partially separated from the connecting portion 40 at the end portion on the side of the waist opening portion 5 in the longitudinal direction, and the other portion is joined to the connecting portion 40. The joint portion 30b of the absorbent body 30 described herein can be realized by a known adhesive such as a hot melt adhesive. Further, the range of the joint portion 30b of the absorbent main body 30 overlaps with the range of the joint portion 45a of the outer side region 45 of each of the joint members 40A and 40B. Further, in Fig. 6, in the region of the joint portion 30b, from the non-facing surface side to the skin facing side, the outer sheet 52, the leakage preventing sheet 51, the joint portion 30b, the cover sheet 34, the back sheet 33, and the absorbent body are formed. 31 and the upper sheet 32 are sequentially arranged (stacked) (the front end portion of the absorber 31 reaches the joint portion 30b), but the front end portion of the absorber 31 from the lower jaw portion 3 side toward the joint portion 40 side may not be joined. The area of the portion 30b. That is, the region of the joint portion 30b may be the outer sheet 52, the leakage preventing sheet 51, the joint portion 30b, the cover sheet 34, the back sheet 33, and the upper sheet 32 in order from the non-facing surface side to the skin facing side. Composition. Further, the distal end portion of the absorbent body 31 can reach the region of the joint portion 30b, and the distal end portion of the absorber 31 from the side of the lower jaw portion 3 toward the side of the joint portion 40 can be positioned in the region of the joint portion 30b.

In FIG. 7(b), the length in which the absorbent main body 30 and the rear side connecting member 40B are overlapped in the thickness direction is indicated by the symbol L1. Further, the length of the non-joining portion 30a of the rear-side connecting member 40B that is not coupled to the absorbent body 30 is indicated by the symbol L2, and the length of the joint portion 30b of the absorbent body 30 that is joined to the rear-side connecting member 40B is indicated by the symbol L3. For example, the ratio (L2/L1) of the length L2 of the non-joining portion 30a to the length L1 of the overlapping range is preferably 1% or more, for example, preferably 1 to 50%, more preferably 5 to 45%, and 10 to 40% is especially good. When expressed by a specific numerical value, the length L2 of the non-joining portion 30a is preferably 1 mm or more, for example, preferably 3 to 100 mm, more preferably 5 to 30 mm, still more preferably 10 to 25 mm, and particularly preferably 10 to 20 mm. . Further, the length L3 of the joint portion 30b may be obtained by subtracting the length L2 of the non-joining portion 30a from the overlap range length L1. Here, although the lengths of the non-joining portion 30a and the joint portion 30b of the absorbent body 30 are described with respect to the rear side connecting member 40B, the description herein is also applicable to the non-joining portion of the absorbent body 30. The length of the 30a and the joint portion 30b with respect to the front side joint member 40A. However, the length of the non-joining portion 30a and the joint portion 30b with respect to the rear side connecting member 40B and the length of the non-joining portion 30a and the joint portion 30b with respect to the front side connecting member 40A may be the same or different.

As described above, in the disposable diaper 100 of the present embodiment, since the respective connecting members 40A and 40B are formed with the active pleats, the air permeability of the pleat forming portion is higher than that of the general disposable diaper in which the pleats are not formed. Slightly worse. Therefore, in the above-described configuration, the end portion of the absorbent body 30 is separated from the connecting portion 40 by the end portion in the longitudinal direction of the absorbent main body 30 away from each of the connecting members 40A and 40B. The gap is easily generated, so the ventilation near the live pleats is improved. According to this configuration, even when a configuration in which the pleats are formed in the joint portion 40 and can be deployed as needed, moisture accumulated in the vicinity of the live pleats can be efficiently discharged, and the occurrence of wetness in the portion can be suppressed. . That is, the non-joining portion 30a of the absorbent body 30 has an effect of improving the air permeability.

Further, as shown in Fig. 7 (a) and Fig. 8, the absorbent main body 30 has a pair of left and right three-dimensional gathers formed by the three-dimensional gather elastic member 36, and a pair of right and left legs formed by the leg stretch member 37. Pleated. As shown in Fig. 8, in the present embodiment, the three-dimensional gathers and the leg gathers are formed by shrinking a single sheet member (side sheet 35) by the three-dimensional gather elastic member 36 and the leg stretch member 37, respectively. Specifically, as shown in FIG. 8, a part of the side panel 35 is fixed to the back surface of the back sheet 33 (not facing the skin surface). Further, a part of the side piece 35 fixed to the back surface of the back sheet 33 is along the longitudinal direction of the absorbent body 31, and is outwardly directed to the inner side of the absorbent body 3 in the width direction from the joint position of the upper piece 32 and the back piece 33. The outer folded portion 35a is formed by folding back. Further, a part of the side sheets 35 which are folded back by the outer folded portion 35a are fixed to the surface (surface facing surface) of the upper sheet 32 so as to sandwich the upper sheet 32 and the back sheet 33. Further, the side piece 35 also extends inward in the width direction from the fixing portion 35b fixed to the upper piece 32. The term "fixed portion" as used herein refers to a boundary line between a portion where the side sheet 35 is fixed to the upper sheet 32 and a portion where the side sheet 35 is not fixed to the upper sheet 32 and is in a free state. In addition, the portion extending inward in the width direction from the fixing portion 35b of the side sheet 35 is folded back toward the inner side in the width direction or the outer side in the width direction of the absorbent body 31 to form the inner folded portion 35c. Then, the inner folded portion 35c of the side panel 35 is fixed with the three-dimensional gather elastic member 36 in the longitudinal direction of the disposable diaper. Similarly, the leg stretchable member 37 is fixed to the outer folded portion 35a of the side panel 35 in the longitudinal direction of the disposable diaper. Further, the leg stretch member 37 may be fixed between the side panel 35 and the back sheet 33. With this configuration, the three-dimensional gather elastic member 36 forms a three-dimensional gather when it is contracted, and the leg gathers 37 form a leg gather when it is contracted.

As shown in FIG. 7( a ), the three-dimensional gather elastic member 36 and the leg stretch member 37 extend not only to the lower jaw portion 3 of the absorbent body 30 but also to the front body side and the back body side, and reach the absorbent body 30. The length edge of the length. That is, the three-dimensional gather elastic member 36 and the leg stretch member 37 are fixed to the side sheet 35 in substantially the entire area in the longitudinal direction of the absorbent body 30.

As shown in Fig. 7(a), the three-dimensional gather elastic member 36 and the leg stretch member 37 have a length from the lower jaw portion 3 of the absorbent body 30 beyond the joint portion 30b to the non-joining portion 30a. In this manner, when either or both of the three-dimensional gather elastic member 36 and the leg stretch member 37 are positioned in the non-joining portion 30a, the non-joined portions 30a are each contracted by the respective portions Connecting member 36, 37 pulled and stood up. The case where the non-joining portion 30a of the absorbent body 30 stands up is exemplified in Fig. 7(b). In this manner, the non-joining portion 30a of the absorbent body 30 rises by the contraction force of the three-dimensional gather elastic member 36 or the leg stretch member 37, and the end portion of the absorbent body 30 and the respective joint members 40A, 40B The gap between them can be maintained. Thereby, the air permeability in the vicinity of the end portion of the absorbent body 30 can be improved.

Further, as shown in FIG. 7(a), in the case where the three-dimensional gather elastic member 36 is fixed to the entire longitudinal direction region of the absorbent body 30 in an elongated state, the joint portion 30b may have a three-dimensional gather elastic member. The expansion and contraction force of 36 becomes invalid and the failure portion 36a becomes invalid. Similarly, in the leg stretchable member 37, the joint portion 30b may have a failure portion 37a for making the expansion and contraction force invalid. That is, each of the telescopic members 36 and 37 is subjected to treatment in the failure portions 36a and 37a shown in Fig. 7(a) so that the stretchability cannot be exhibited. For example, by cutting the respective telescopic members 36 and 37 in the failing portions 36a and 37a and cutting them, the expansion and contraction force can be invalidated. Further, for example, in the failure portions 36a and 37a, the respective telescopic members 36 and 37 are fixed to the side sheets 35 in a non-stretched state, and the expansion and contraction force can be made ineffective. The failure portions 36a and 37a of the respective telescopic members 36 and 37 are only required to be provided at the joint portion 30b of the absorbent body 30, but are particularly preferably provided in the vicinity of the boundary between the joint portion 30b and the non-joining portion 30a. Specifically, at least a part of the failure portions 36a and 37a of each of the telescopic members 36 and 37 is preferably in the range of 10 mm from the boundary between the self-joining portion 30b and the non-joining portion 30a. In this manner, by locally disabling the stretching force of each of the telescopic members 36, 37 at the joint portion 30b of the absorbent body 30, the absorbent body 30 can be prevented from being greatly deflected by the contraction force of each of the telescopic members 36, 37. Or shrinking phenomenon. By this design, the fit of the absorbent body 30 to the wearer's skin can be maintained.

Further, here, an example in which both the three-dimensional gather elastic member 36 and the leg stretch member 37 are present in the non-joining portion 30a of the absorbent body 30 is disclosed. However, any one of the three-dimensional gather elastic member 36 and the leg stretch member 37 may be located at the non-joining portion 30a of the absorbent body 30.

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 modifications or improvements that can be derived from those skilled in the art based on the matters described in the present specification are also included.

[Industrial availability]

The present invention can be applied to a disposable diaper such as a panty type or a belt type. Thus, the present invention is well suited for use in disposable diaper manufacturing.

10‧‧‧Predecessor body

11‧‧‧Inner film

12‧‧‧ External film

13‧‧‧Lumbar telescopic member

20‧‧‧Back body

21‧‧‧ inner film

22‧‧‧ outside film

23‧‧‧Lumbar telescopic member

30‧‧‧Absorbable ontology

30a‧‧‧non-joined parts

30b‧‧‧ joints

31‧‧‧Acceptor

32‧‧‧Upper film

33‧‧‧ Back film

34‧‧‧ Cover

40‧‧‧Connecting Department

40A‧‧‧ front side joint member

40B‧‧‧Back side joint member

41‧‧‧Upward folding

42‧‧‧Folding section

43‧‧‧Intermediate area

44‧‧‧ inside area

44a‧‧‧ joints

45‧‧‧Outer area

45a‧‧‧ joints

46‧‧‧Connecting section telescopic members

51‧‧‧ leakproof film

52‧‧‧Outer film

100‧‧‧Disposable diapers

Claims (3)

A disposable diaper comprising: a front outer body (10) on a wearer's abdomen side; a rear body outer body (20) on a wearer's back side; and an absorbent body on the wearer's lower jaw (30) characterized in that the absorbent body (30) is connected via a connecting portion (40) having an upward folded portion (41) and a folded down portion (42) extending in a width direction of the disposable diaper. In the outer casing of the front body outer casing (10) and the rear body outer casing (20), the absorbent body (30) has a non-joining portion (30a), which is discarded in the foregoing The longitudinal end of the diaper is not joined to the skin-facing surface of the connecting portion (40); and the joint portion (30b) is joined to the lower portion of the non-joining portion (30a) in the longitudinal direction. The surface of the connecting portion (40) faces the skin. The disposable diaper according to claim 1, wherein the absorbent body (30) has an elastically stretchable member that is fixed in an elongated state along the longitudinal direction, and the elastically stretchable member is from the non-joining The portion (30a) extends to the aforementioned joint portion (30b). The disposable diaper according to claim 1 or 2, wherein the connecting portion (40) has an intermediate portion between the upward folded portion (41) and the downward folded portion (42). The connecting portion (40) is in a state in which the upwardly folded portion (41) and the downwardly folded portion (42) are folded, and the intermediate portion (43) is detachably or non-detachably joined to the intermediate portion ( 43) A joint region (43a) facing the skin-facing side and the portion facing the skin-facing side.