TW201735883A - Disposable diaper - Google Patents

Abstract

[Problem] 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. [Solution] 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) has an absorbing part (31), a liquid-permeable top-sheet (32), and a liquid-impermeable back-sheet (33) that covers; the absorbent body (30) is connected, via a connecting part (40) having a peak fold and a valley fold that extend in the widthwise direction of the diaper, to the front panel outer body (10) and/or the rear panel outer body (20); and the absorbing part (31) has recesses (38) formed therein that recess in the thickness direction of the absorbing part (31) or through-holes formed therein which pass therethrough in the thickness direction in at least an end section thereof where the connecting part (40) is positioned on the front panel outer body (10) side and/or on the rear panel outer body (20) side.

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 wearer's lower jaw and being relaxed in the vicinity of the lower jaw, and it is possible to prevent the wearer's back from being exposed due to insufficient length of the rear identity, or to abandon A gap occurs between the 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. Users bring a sense of unhappiness. 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. Here, the "upward folded portion" refers to a folded portion that is convex upward in the wearing state, and the "folded downward 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.

Further, by forming the pleats formed by the upwardly folded portion 41 and the downwardly folded portion 42 in the joint portion 40, a space is created between the upwardly folded portion 41 and the wearer's skin. The space inside the pleat has an effect of diffusing moisture retained in the disposable diaper in the wearing state. That is, when moisture is introduced into the space inside the living pleats, the moisture spreads along the space inside the live pleats toward the width of the disposable diaper. Therefore, by forming the live pleats in the joint portion 40, the air permeability of the diaper is improved, and the comfort in the wearing state can be improved.

However, in the wearing state of the disposable diaper, the live pleats are flattened in the thickness direction by the clothes, and it is difficult to create a space between the pleats and the wearer's skin, and there is a concern that moisture is retained therein. Therefore, in the present invention, the absorbent body 31 is at least located on both the front outer body 10 side and the rear outer body 20 side of the joint portion 40. The end portion of either of the concave portions 38 that are recessed in the thickness direction of the absorbent body 31 or a penetration portion that penetrates the thickness direction of the absorbent body 31. In addition, the "recessed portion" herein may be a groove formed by compressing an absorbent material constituting the absorbent body 31. Further, the "recessed portion" may have a recessed portion in a part of a region smaller than a large portion of the surface of the absorber 31, and the recessed portion may be formed by the smaller portion, or may be a portion of the surface of the specific absorber 31. A small portion of the area is in a convex shape, and most of the surface constitutes a "concave portion". The "through portion" is a region where no absorbent material or other material is present in the thickness direction of the absorber 31. The penetration portion may be a through hole or a slit.

According to the above configuration, the concave portion 38 or the penetration portion is formed at the end portion of the absorbent body 31 on the side where the connection portion 40 is provided in the longitudinal direction, whereby the gap between the live pleats and the wearer's skin can be ensured by the concave portion 38 or the penetration portion. . According to this configuration, the air permeability of the connecting portion 40 in the folded state can be improved. Further, even when the pleats of the connecting portion 40 are crushed by the clothes, since the concave portion 38 or the penetrating portion is formed at the end portion of the absorbent body 31, a gap can be generated between the pleats and the wearer's skin. Prevent moisture from staying there. In the present invention, when the length of the absorbent body 31 in the longitudinal direction is 100%, the end portion of the absorbent body 31 in the longitudinal direction may be, for example, 30% in the center direction from each end edge in the longitudinal direction. The length is the same as the width of the absorbent body 31. The recess 38 may be formed not only at the end but also over the entire area of the absorber 31. Further, as will be described later, the concave portion 38 may be formed on the opposite side of the wearer side opposite to the wearer side to improve air permeability. Further, when the absorbent body 31 has the concave portion 38, the concave portion 38 is preferably formed such that its depth is shallower from the central portion in the longitudinal direction of the disposable diaper to the end portion.

In 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 connecting portion 40 is folded in the upward folded portion 41 and the downward folded portion 42, the intermediate portion 43 preferably has a thickness direction overlapping with a concave portion 38 of the absorbent body 31 or a region formed by the penetrating portion. According to this configuration, the end portion of the absorber 31 is inserted into the space formed by the pleats of the joint portion 40. By this action, the body fluid or the soft stool flowing in the longitudinal direction of the absorbent body 31 can be introduced into the inner space of the living pleats, and the body fluid or the soft stool can be absorbed by the absorbent body 31, thereby preventing leakage of the body fluid. Further, even when the end portion of the absorbent body 31 overlaps the active pleats, the concave portion 38 or the penetration portion is formed at the end portion thereof, so that the air permeability of the portion can be ensured.

In the present invention, the intermediate portion 43 of the coupling portion 40 preferably has an engagement portion 43a which is detachable or non-detachable in a state in which the coupling portion 40 is folded in the upwardly folded portion 41 and the downwardly folded portion 42. Engaged in the portion of the intermediate portion 43 facing the skin-facing side and facing the non-facing muscle The location of either or both of the sites on the skin side. Further, the intermediate portion 43 is joined 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. In this case, the joint region 43a is preferably located in a region where the intermediate portion 43 of the joint portion 40 does not overlap the absorbent body 31 in the thickness direction. In this manner, when the connecting portion 40 can be joined to the opposing portion by the peelable joining region 43a, the joining portion 40 can be unfolded in the longitudinal direction of the disposable diaper by peeling the joining region 43a as needed. Further, when the connecting portion 40 is partially joined to the opposing portion by the non-detachable joining region 43a, the connecting portion 40 can be developed in the longitudinal direction of the disposable diaper in the non-joining region 43b as needed. Further, in the pull-on disposable diaper, the side seal portion 4 can also be construed as functioning as a joint region 43a as referred to herein.

In the present invention, the absorbent body 31 of the absorbent body 30 may be folded back at the upwardly folded portion 41 of the joint portion 40. That is, the absorber 31 of the absorbent body 30 is elongated in the longitudinal direction beyond the upwardly folded portion 41 of the joint portion 40, so that a part of the absorbent body 31 is folded back along the upward folded portion 41, and a double layer is formed in the thickness direction. overlapping. Further, in the present invention, the folding back is not limited to being completely N-shaped, and may be reversed in the longitudinal direction. For example, the upwardly folded portion 41 and the downwardly folded portion 42 are also formed by a U-shaped folded portion and an inverted U-shaped folded portion.

According to the above configuration, by returning a part of the absorber 31 along the upwardly folded portion 41 of the joint portion 40, the space inside the flap can be surely maintained by the rigidity of the absorber 31. Therefore, even if an external force is received from the outer side of the disposable diaper in the thickness direction, the space inside the living pleat is not easily crushed. Therefore, the moisture retained in the disposable diaper is introduced into the space inside the living pleat, and then spreads along the space in the width direction of the diaper, and is easily discharged to the outside. As a result, the air permeability inside the diaper can be improved, and the comfort of the diaper can be improved.

In the present invention, the absorbent body 31 preferably has a thin layer region 39 or a low basis weight region at the end portions of the front outer casing 10 side and the rear outer casing 20 side, and the thin layer is preferably formed. The thickness of the absorbent body 31 in the region 39 is thinner than the thickness of the absorbent body 31 in the central portion in the longitudinal direction of the disposable diaper, and the weight per unit area of the absorbent body 31 in the low basis weight region is in the disposable diaper length. The absorber 31 of the central portion of the direction has a small basis weight. The thin layer region 39 is a portion where the thickness of the absorber 31 is thinner than the central portion in the longitudinal direction, and is located at the end portion of the absorber 31 in the longitudinal direction. The low basis weight region means that the weight per unit area of the absorbent body 31 is smaller than the central portion in the longitudinal direction, and is located at the end portion of the absorbent body 31 in the longitudinal direction. The absorbent body 31 is in contact with the wearer by the outer casing of the disposable diaper (the front outer casing 10 and the rear outer casing 20), but the disposable diaper does not A step difference occurs between the region having the absorber and the region having the absorber. In the state of a step, when the wearer sits down or lies down, there is a pressure locally acting on the wearer's skin due to the step, and there is a situation of pain or discomfort or discomfort. By thinning the contour (end portion) or the weight per unit area of the absorbent body 31, it is possible to prevent the skin from being partially stressed due to the step. For the same reason, when the absorber 31 has the concave portion 38 or the penetration portion, the peripheral portion of the concave portion 38 and the penetration portion may be a thin layer region 39 or a low basis weight region, so as to prevent the concave portion 38 and the penetration portion from being different from each other. Part of the difference causes the pressure to act locally on the wearer's skin.

According to the above configuration, by making the thickness of the end portion of the absorber 31 in the longitudinal direction thinner or reducing the weight per unit area of the end portion, the air permeability in the vicinity of the end portion can be improved. In particular, as described above, in the form in which the end portion of the absorbent body 31 is folded back along the upwardly folded portion 41 of the joint portion 40, the folded portion of the absorbent body 31 is set as a thin layer region 39 or a low unit area. The weight area is effective for improving ventilation. The thickness of the central portion in the longitudinal direction of the absorbent body 31 is usually 3 to 6 mm, preferably 4 to 5 mm. In this case, the thickness of the thin layer region 39 is preferably from 1 to 4 mm. By setting the thickness of the thin layer region 39 within this range, the absorber 31 is less likely to undergo a shape change. In the case where the absorber 31 has a low basis weight region at the end, the unit weight of the low basis weight region is preferably 10 to 80, assuming that the basis weight of the absorbent body 31 in the central portion in the longitudinal direction is 100%. %, more preferably 20 to 75%, and even more 30 to 70%.

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

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

31‧‧‧Acceptor

31a‧‧‧Return Department

32‧‧‧Upper film

33‧‧‧ Back film

34‧‧‧ Cover

35‧‧‧ side film

36‧‧‧Three-dimensional pleated telescopic members

37‧‧‧ leg flexure members

38‧‧‧ recess

39‧‧‧Thin layer area

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

43c‧‧‧ joints

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 longitudinal sectional view showing a state in which a live pleat is 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 an enlarged main body portion of the longitudinal cross-sectional view of Fig. 3;

Fig. 7 is a cross-sectional view showing a variation of the disposable diaper of the present invention corresponding to Fig. 6.

[Embodiment of the Invention]

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 to those skilled in the art.

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

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 front body 1 side overlaps with the front body exterior body 10 in the thickness direction. On the other hand, the end portion on the side of the back body 2 overlaps 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. Moreover, the absorbent body 30 is In plan view, it is formed into a substantially rectangular shape having a long length direction. However, the shape of each of the exterior bodies 10 and 20 and the absorbent 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 can 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. Further, as shown in FIG. 2, the absorber 31 is formed with a concave portion 38 at its end portion in the longitudinal direction. In FIG. 2, although the formation form of the recessed part 38 is shown, the penetration part may be formed in the same position. The detailed configuration of the recess 38 will be described in detail later.

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 the present specification, the term "liquid permeability" means, for example, a property in which water is permeable to less than one minute when 5 ml of water at normal temperature is poured 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 permeable even when subjected to a bath of 5 ml of normal temperature water 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 the hand feeling, the cover sheet 34 is attached to the non-facing surface of the back sheet 33. 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 (the connecting portion 40) may be formed integrally with the front body exterior body 10. The member may be formed as an integral member with the absorbent body 30. Similarly, the rear connecting member 40B (the connecting portion 40) may be formed as an integral member with the rear body casing 20, or may be formed as an absorbent body. 30 is a one-piece component.

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. 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. Further, in the example of FIG. 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 region 45 may be joined to the absorbent body 30 over the entire region. Each of the joint portions 44a and 45a described herein can be realized by a conventional adhesive such as a hot melt adhesive.

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 such that the joint region 43a is disposed in the region where the absorbent body 30 is located in a region where the respective joint members 40A and 40B overlap with the outer casings 10 and 20 in the thickness direction. The left and right sides of the width direction do not overlap with the absorbent body 30. In other words, in the plan view, the length direction of each of the outer casings (10, 20), the respective connecting members (40A, 40B), and the overlapping portion of the absorbent body 30 is non-contact. Combination area 43b. In this manner, the joint region 43a can also be defined as a region having a certain width in the width direction in a range not overlapping the absorbent body 30. 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 active pleats are pushed out, the pleats are pushed by the clothes worn by the wearer or the like, 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. When the joint region 43a is a peelable one, 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 FIGS. 2 and 3, in a state in which the respective connecting members 40A and 40B are completely folded along the upwardly folded portion 41 and the folded down portion 42, the absorbent members are preferably covered by the respective connecting members 40A and 40B. The end portion of the body 30 in the longitudinal direction faces the skin surface. In other words, in a state in which the respective connecting members 40A and 40B are folded, it is preferable that the intermediate portion 43 of the connecting portion 40 and the absorber 31 of the absorbent body 30 are overlapped in the thickness direction. In this case, as shown in FIG. 3, the outer casing (10, 20), the outer region 44 of the joint member, the intermediate portion 43 of the joint member, the absorbent body 31 of the absorbent body, and the outer region 45 of the joint member are provided. It overlaps in the thickness direction from the side facing the skin. With this configuration, the end portion of the absorbent body 31 in the longitudinal direction of the absorbent body is housed in the inner space of the pleat formed in each of the coupling members 40A and 40B. In addition, the "folded inner space" herein means a space that opens downward between the intermediate portion 43 and the outer region 45 of each of the coupling members 40A and 40B toward the lower side of the upper folded portion 41. and, The end portion of the absorbent body 31 constituting the absorbent body 30 in the longitudinal direction is preferably housed in such a living space of the pleats. With this configuration, body fluid or soft stool flowing along the longitudinal direction of the absorbent body 30 can be accommodated in the space to prevent leakage to the outside.

Further, when the respective connecting members 40A and 40B are in the folded state, the moisture permeable to the inside of the disposable diaper can be introduced into the space in the wearing state through the forming space. Moreover, the space inside the pleats expands in the width direction of the disposable diaper. Therefore, the moisture introduced into the space can be diffused toward the width direction of the disposable diaper. As a result, in particular, the air permeability in the vicinity of the end portion of the absorbent body 30 in the longitudinal direction is improved, and the inside of the disposable diaper is less likely to be wet.

Further, as shown in FIG. 2, when the joint region 43 is provided on the right and left sides in the width direction of the absorbent main body 30, the upwardly folded portion 41 of each of the joint members 40A and 40B extending in the width direction (see FIG. 3) The edge of the joint region 43a extending in the longitudinal direction, the intermediate portion 43, and the outer region 45 may define a space having a downward opening. Therefore, the end portion of the absorbent body 30 in the longitudinal direction can be accommodated in the space. In particular, it is preferable that the end portion of the absorbent body 31 constituting the absorbent body 30 in the longitudinal direction is housed in a space defined herein.

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, the respective connecting members 40A and 40B can be freely deployed as needed. 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 opposite portions thereof may be either a peelable temporary joint or a non-peelable joint. Strippable joint area 43a described herein Both the temporary temporary bonding and the non-peelable bonding can be realized by a conventional adhesive such as a hot-melt adhesive, and the peelable or non-peelable type is selected as long as the coating amount or adhesive force of the adhesive is adjusted. The peelable joining state means that, for example, when peeling is desired in advance, both can be peeled off without causing the intermediate portion 43 or the sheet member constituting the opposite portion to be broken or broken. On the other hand, the non-peelable joining state means that, for example, if peeling is not intended in advance, if the peeling is to be performed, the intermediate member 43 or the sheet member constituting the opposite portion thereof may be cracked or broken. . Further, although the joint region 43a may cover the entire region of the intermediate portion 43, in this case, the joint region 43a releasably joins (i.e., temporarily engages) the intermediate portion 43 to the opposite 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 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 of the disposable diaper preferably has one or a plurality of connecting portion telescopic members disposed along the upward folding portion 41. 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.

Further, as shown in FIG. 1 and FIG. 2, in each of the connecting members 40A and 40B, a plurality of tummy telescopic members 47 extending in the width direction are disposed at predetermined intervals in the longitudinal direction of the disposable diaper. 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 of the disposable diaper. However, the lower abdominal stretchable member 47 is not disposed at the central portion in the width direction of each of the joint members 40A and 40B, or is partially cut so as not to exhibit stretchability. That is, the lower abdomen telescopic members 47 are basically located on both sides in the width direction of the absorbent body 30. 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).

[recess of the absorber]

The concave portion 38 formed in the absorbent body 31 of the absorbent body 30 will be described with reference to Figs. 2 to 6 . The absorber 31 is recessed in the thickness direction at the concave portion 38 in comparison with the adjacent peripheral portion. For example, the concave portion 38 is a groove-like portion which can be formed by compressing the absorbent material constituting the absorbent body 31. Alternatively, the absorber 31 may be formed with the concave portion 38 in advance. Further, the absorber 31 may have a penetration portion penetrating in the thickness direction instead of the recess portion 38. Examples of the penetration portion include a through hole or a slit. When the concave portion 38 has a groove shape, it is preferable that the surface of the absorbent body 31 is recessed toward the skin surface. However, the non-facing surface of the absorbent body 31 may be recessed, or the skin surface and the non-facing surface may be faced. It is sunken on both sides. In the absorbent body, since air can pass through the thickness direction, even if there is a concave portion on the back side of the absorbent body 31, once the moisture passes through the thickness direction, it is present through the absorbent body and the back. The recess between the sheets flows to the end of the absorber and reaches the joint. Therefore, even if the concave portion 38 is formed on the opposite side of the wearer, the effect of preventing moisture retention can be exhibited. When the recessed portion 38 is in the form of a groove, the thickness of the absorber 31 at the portion where the recessed portion 38 is formed is assumed to be 10 to 90%, 15 when the thickness of the absorber 31 in the portion where the recess 38 is not formed is 100%. Up to 80%, or 20 to 70%.

Further, the concave portion 38 is formed at an end portion of the absorbent body 31 in the longitudinal direction. Specifically, the recessed portion 38 is preferably formed in a range in which the absorber 31 and the respective connecting members 40A and 40B and the outer casings 10 and 20 overlap each other (the range of the front body 1 and the back body 2 shown in FIG. 2 ). In particular, it is preferable that the concave portion 38 is formed at least in a range in which the absorbent body 31 overlaps with each of the exterior bodies 10 and 20. In the example shown in FIG. 2, the connection members 40A and 40B are provided in both the front body 1 and the back body 2. Therefore, it is preferable that the concave portion 38 of the absorbent body 31 is formed at both ends of the end portion on the side of the front body 1 and the end portion on the side of the back body 2 . However, the concave portion 38 of the absorber 31 may be formed at least at the end on the side where the connecting members 40A and 40B are provided. Therefore, it is not necessary to form the recesses 38 at the ends on both sides in the longitudinal direction of the absorber 31.

In the example shown in FIG. 2, the concave portion 38 is formed in a line shape, and the plurality of linear concave portions 38 are intersected in a lattice pattern. Specifically, in the example of FIG. 2, a plurality of linear recesses 38 form a diagonal square lattice pattern. Here, the "skewed square lattice pattern" is a plan view in which a plurality of linear concave portions 38 extending in a direction oblique to the longitudinal direction and the width direction (that is, obliquely) intersect and are divided into a rhombic shape (diamond shape). In terms of the pattern of the non-recessed area. In addition, the non-recessed area means a region in which the concave portion 38 is not formed in the absorbent body 31. Further, although not shown in the drawings, a plurality of linear recesses 38 may be formed by a square lattice pattern. In the plan view, a plurality of linear recesses 38 extending in the longitudinal direction in parallel and a plurality of linear recesses 38 extending in the width direction intersect with each other to form a square (tetragonal). The pattern of the non-recessed area. In this manner, by forming the plurality of concave portions 38 into a lattice pattern such as a square lattice shape or a square lattice shape, the skin feel and air permeability of the absorbent main body 30 can be improved. However, the shape of the concave portion 38 is not limited to the above-described lattice pattern. For example, the concave portion 38 may be a straight line extending in the longitudinal direction, or may be a plurality of straight lines extending in parallel in the longitudinal direction. In any of the patterns, it is preferable that the recess 38 includes a pattern that reaches the longitudinal end edge of the absorber 31. That is, it is preferable that the end surface in the longitudinal direction of the absorber 31 is formed with the concave portion 38.

The disposable diaper of the present invention improves air permeability by introducing air in the diaper into the pleat inner space formed in each of the joint members 40A and 40B. However, it is also considered that in the wearing state of the disposable diaper, the live pleats are crushed by the clothes in the thickness direction, so that the live pleats are less likely to be generated between the wear pleats and the wearer's skin. Space, where moisture is retained. Therefore, as described above, by forming one or a plurality of recesses 38 at the end portions of the absorber 31 in the longitudinal direction, air can be introduced into the pleat inner space via the recesses 38 even in the wearing state. Therefore, the recess 38 has the function of a venting groove. In this manner, by forming the concave portion 38 at the end portion in the longitudinal direction of the absorbent body 31 on the side where the connecting portion 40 is provided, the recess portion 38 can secure the gap between the absorbent body and the wearer's skin, thereby improving the joint portion 40. Ventilation when folded. Further, in the wearing state of the disposable diaper, even if the pleats of the connecting portion 40 are crushed by the clothes, the concave portion 38 is formed at the end portion of the absorbent body 31, and the pleats are worn between the pleats and the wearer's skin. A gap is created to prevent moisture from escaping. Similarly to the recessed portion 38, the penetration portion has an effect of preventing moisture retention, and is advantageous in improving the air permeability.

[variation]

Next, a modification of the disposable diaper of the present invention will be described with reference to Fig. 7 . Fig. 7 is an enlarged view of the cross-sectional structure of the back body 2 side, but the back body 2 side structure described here is also applicable to the front body 1 side.

In the example shown in Fig. 7, the absorbent body 30 is elongated in the longitudinal direction as compared with the example shown in Fig. 6. That is, as shown in FIG. 7, the absorbent body 30 is joined to the skin-facing surface of the rear side connecting member 40B, but the absorbent body 30 extends beyond the upward folded portion 41 of the rear side connecting member 40B and extends to the intermediate portion. 43. Therefore, the absorbent body 30 is joined not only to the outer region 45 of the rear side connecting member 40B but also to the skin facing surface of the intermediate portion 43. In other words, the rear side connecting member 40B has the joint portion 45a where the outer region 45 joins the absorbent body 30, and the intermediate portion 43 also has the joint portion 43c that joins the absorbent body 30. Further, the longitudinal end edge of the absorbent body 30 is preferably located in the intermediate portion 43 of the rear side connecting member 40B. That is, the length of the absorbent body 30 is preferably not to exceed the downwardly folded portion 42 of the rear side connecting member 40B.

Further, in the example shown in FIG. 7, the absorbent body 31 of the absorbent body 30 extends beyond the upwardly folded portion 41 of the rear side connecting member 40B and extends to the intermediate portion 43. Therefore, the absorber 31 has the return portion 31a which is folded back toward the skin surface side along the upwardly folded portion 41 of the rear side connecting member 40B. Therefore, the absorber 31 is formed to overlap the two layers in the thickness direction at the portion where the folded portion 31a is formed. Since the absorbent body 31 is made of an absorbent material such as fluff pulp and has a predetermined thickness, when the absorbent body 31 is folded back by the upwardly folded portion 41, the pleats are made by the rigidity of the absorbent body 31. The internal space is expanded. In particular, the absorbing body 31 is folded back in the upwardly folded portion 41, and even when the pleats are pressed from the outside, the internal space of the pleats is hard to collapse. Therefore, in the variation shown in Fig. 7, since the internal space of the live pleats can be maintained wider, the air permeability in the vicinity of the live pleats is improved.

Further, in the example shown in FIG. 7, the absorber 31 of the absorbent body 30 has a thin layer region 39 at the end portion in the longitudinal direction. The thin layer region 39 means a portion where the thickness of the absorbent body 31 is at least thinner than the thickness of the absorbent body 31 at the central portion in the longitudinal direction of the disposable diaper. The thin layer region 39 can be formed, for example, by compressing an absorbent material constituting the absorbent body 31. The thin layer region 39 is located at the end portion of the absorbent body 31 in the longitudinal direction, and is preferably a strip-shaped region extending over the entire width direction region of the absorbent body 31. In the thickness of the absorber 31 of the thin layer region 39, assuming that the thickness of the absorber 31 in the central portion in the longitudinal direction is 100%, the thickness of the absorber 31 is set to be 10 to 80%, 20 to 75%, or 30 to 70% can be. In addition, the thin layer region 39 can also form the aforementioned recess 38.

The thin layer region 39 may be provided at an end portion of either or both of the front outer body 10 side and the rear body outer body 20 side of the absorber 31. In particular, the thin layer region 39 is preferably provided at the end on the side where the joint members 40A, 40B are provided. In this manner, by providing the thin layer region 39 at the end portion on the side where the connecting members 40 and 40B are provided, the partial thickness of the absorber 31 can be made thinner, and the air permeability of the end portion can be improved.

Further, as shown in FIG. 7, the thin layer region 39 is preferably formed in the end portion of the absorber 31 and is folded back along the upwardly folded portion 41 of the rear side connecting member 40B. Specifically, it is preferable that a thin layer region 39 is formed in the folded portion 31a of the absorbent body 31, and in a state in which the absorbent body 31 is folded back along the upward folded portion 41, in a state of facing the folded portion 31a. It is preferable that the portion (overlapping portion) forms the thin layer region 39. In this manner, by providing the portion of the absorbent body 31 located near the upwardly folded portion 41 as the thin layer region 39, it is easier to fold the absorbent body 31 along the upward folded portion 41. Further, by providing the folded portion 31a of the absorbent body 31 and the opposite portion thereof as the thin layer region 39, when the end portion of the absorbent body 31 is folded back along the upward folded portion 41, the thickness thereof can be prevented from becoming excessive. Therefore, even when the absorbent body 31 is folded back, it is possible to avoid damaging the wearing feeling.

In the above-described example of Fig. 7, although the absorbent body 31 has a thin layer region 39, the absorbent body 31 may have a low basis weight region instead of the thin layer region 39, which has a low basis weight region. The basis weight is smaller than the basis weight of the absorbent body (31) at the central portion in the longitudinal direction of the disposable diaper. By having a low basis weight region, as in the case where the absorber 31 has the thin layer region 39, the ease of returning and the wearing feeling of the absorber 31 can be improved. The low basis weight region can be formed by, for example, reducing the density of the absorber at the end of the absorber. Assuming that the weight per unit area of the absorbent body 31 at the central portion in the longitudinal direction is 100%, the low basis weight region may have a basis weight of 50 to 80%, 20 to 75%, or 30 to 70%. Low unit area weight area suction The thickness of the body 31 may be the same as or different from the thickness of the absorber 31 in the central portion in the longitudinal direction. The low basis weight region is located at the end portion of the absorbent body 31 in the longitudinal direction, and is preferably a strip-shaped region extending over the entire width direction region of the absorbent body 31. Other preferred embodiments of the thin layer region 39 are also applicable to low basis weight regions. The absorbent body 31 may also have both a thin layer region 39 and a low basis weight region.

Regarding the modification shown in Fig. 7, other configurations may be the same as those of the embodiment described with reference to Figs. 1 to 6 .

In the above description, in order to present 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 includes morphological changes or morphological improvements that can be derived by those skilled in the art based on the matters contained in the present specification.

[Industrial availability]

The present invention can be applied to a disposable diaper such as a pant type or a belt type. Thus, the present invention is applicable to the manufacture of disposable diapers.

1‧‧‧Predecessor

2‧‧‧ Back body

3‧‧‧Lower Department

4‧‧‧Side sealing department

10‧‧‧Predecessor body

13‧‧‧Lumbar telescopic member

20‧‧‧Back body

23‧‧‧Lumbar telescopic member

30‧‧‧Absorbable ontology

31‧‧‧Acceptor

32‧‧‧Upper film

33‧‧‧ Back film

34‧‧‧ Cover

35‧‧‧ side film

36‧‧‧Three-dimensional pleated telescopic members

37‧‧‧ leg flexure members

38‧‧‧ recess

40‧‧‧Connecting Department

40A‧‧‧ front side joint member

40B‧‧‧Back side joint member

43a‧‧‧ joint area

43b‧‧‧non-joined area

47‧‧‧lower abdomen expansion member

100‧‧‧Disposable diapers

Claims (5)

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) comprises: an absorbent body (31); a liquid-permeable top sheet (32) covering the skin-facing surface of the absorbent body (31); and a coating of the absorbent body ( 31) a liquid-impermeable back sheet (33) that is not facing the skin surface, wherein the absorbent body (30) is via an upwardly folded portion (41) and a downwardly folded portion (having a width direction extending from the disposable diaper) The connecting portion (40) of 42) is connected to an outer casing of either or both of the front outer casing (10) and the rear outer casing (20), and the absorber (31) is at least The end portion of the front body outer casing (10) side and the rear body outer casing (20) side at the position where the connecting portion (40) is located has a recessed in the thickness direction of the absorber (31). The recessed portion (38) or a through portion penetrating the thickness direction of the absorber (31). The disposable diaper according to claim 1, wherein the connecting portion (40) has an intermediate portion (43) 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, wherein the intermediate portion (43) is formed with the concave portion (38) of the absorbent body (31) or the aforementioned The regions formed by the penetration portions overlap in the thickness direction. The disposable diaper according to claim 2, wherein the intermediate portion (43) has a joint region (43a), and the joint portion (40) is in the upward folded portion (41) and the downward folded portion ( 42) In a folded state, the joint region (43a) is detachably or non-releasably joined to both the skin-facing side surface portion of the intermediate portion (43) and the non-facing skin side portion. In one portion, the joint region (43a) is located in a region where the intermediate portion (43) and the absorbent body (31) do not overlap in the thickness direction. The disposable diaper according to claim 2, wherein the absorbent body (31) of the absorbent body (30) is applied along the upwardly folded portion (41) of the joint portion (40). Fold back. The disposable diaper according to any one of claims 1 to 4, wherein the absorbent body (31) is on the side of the front outer casing (10) and the rear outer casing (20) side. The ends of either or both have a thin layer region (39) or a low basis weight region, and the thickness of the absorbent body (31) of the thin layer region (39) is greater than the central portion of the length of the disposable diaper. The thickness of the absorber (31) is thin, and the basis weight ratio of the absorber (31) in the low basis weight region is the unit weight of the absorber (31) at the central portion in the longitudinal direction of the disposable diaper. small.