WO2017159295A1 - 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 diapers

The present invention relates to a disposable diaper that is attached to a wearer's inseam and absorbs and holds a liquid such as urine.

Conventionally, disposable diapers having a plurality of tacks formed on the back are known. For example, in the disposable diaper disclosed in Patent Document 1, a tuck is formed by folding a sheet member constituting the back body along a mountain fold line and a valley fold line. For example, when the wearer tilts forward, the tack is developed in the vertical direction in accordance with the elongation of the wearer's back. Therefore, the back of the diaper can be prevented from slipping toward the wearer's crotch and sagging in the vicinity of the crotch. The back of the back of the diaper is too short and the back of the wearer protrudes, or the disposable diaper and the wearer It is possible to avoid a gap between the backs of the two.

JP 2012-239555 A

As mentioned above, by forming multiple tacks on the back of the disposable diaper, the diaper can be made to follow the wearer's body growth, thus improving the fit and wearing feeling of the diaper. it can. However, since this tack is formed by folding the sheet member constituting the back body, the breathability is reduced at the part where the sheet member overlaps, and moisture accumulates between the wearer's skin and the diaper, There was a risk of giving the wearer discomfort due to stuffiness. Further, when the number of tacks is plural, a decrease in air permeability becomes a more significant problem.

Therefore, an object of the present invention is to improve the air permeability of the part where the tack is formed in the disposable diaper separated into the front body exterior body, the back body exterior body, and the absorbent main body.

The present invention relates to a disposable diaper. The disposable diaper of the present invention includes a front body exterior body 10 located on the wearer's abdomen side, a rear body exterior body 20 located on the wearer's back side, and an absorbent main body 30 located on the wearer's crotch. Prepare. The absorbent main body 30 includes an absorbent body 31, a liquid-permeable top sheet 32 that covers the skin-facing surface of the absorbent body 31, and a liquid-impermeable back sheet that covers the skin-non-facing surface of the absorbent body 31. 33. The present invention can be applied to both a pants-type disposable diaper and a tape-type disposable diaper. The pants-type disposable diaper is connected in a substantially annular shape by joining the front body exterior body 10 and the back body exterior body 20 at the side seal portions provided on the left and right sides of the disposable diaper in the width direction. It is a diaper of the type in which a waist opening located around and a leg opening located around both legs of the wearer are formed. In the tape-type disposable diaper, a pair of right and left fastening tapes are attached to both end portions in the width direction of one of the outer bodies of the front body exterior body 10 and the back body exterior body 20, and the fastening tape is attached to the exterior. It is a type of diaper that is worn on the wearer's inseam by fastening to the other side of the body.

The absorptive main body 30 includes a connecting portion 40 having a mountain fold portion 41 and a valley fold portion 42 extending in the width direction of the disposable diaper with respect to both or any one of the front body exterior body 10 and the back body exterior body 20. Are connected through. The “mountain fold portion” referred to here is a folded portion that protrudes upward in a worn state, and the “valley fold portion” is a folded portion that protrudes downward in a worn state. The connecting portion 40 may be a separate independent member separated from the front body exterior body 10, the back body exterior body 20, and the absorbent main body 30, or a member integrated with the absorbent main body 30. It may be a member integrated with the exterior body. In the present specification, the term “exterior body” simply refers to both or either the front body exterior body 10 and the back body exterior body 20.

As in the above configuration, the connecting portion 40 is provided between the absorbent main body 30 and the exterior bodies 10 and 20, and the tack is formed on the connecting portion 40, thereby improving the air permeability of the portion where the tack is formed. Can do.

Further, by forming a tack made of the mountain fold 41 and the valley fold 42 in the connecting portion 40, a space is generated between the mountain fold 41 and the wearer's skin. Such a space inside the tack has an effect of diffusing moisture accumulated in the disposable diaper when worn. That is, when moisture is introduced into the space inside the tack, the moisture spreads in the width direction of the disposable diaper along the space inside the tack. For this reason, the air permeability of a diaper improves by forming a tack | tuck in the connection part 40, and the comfort of a wearing condition can be improved.

However, when the disposable diaper is worn, the tack is crushed in the thickness direction by the clothes, and it is difficult to create a space between the tack and the wearer's skin, and there is a concern that moisture may accumulate there. Therefore, in the present invention, the absorber 31 is at least in the thickness direction of the absorber 31 at the end of either the front body exterior body 10 side and the back body exterior body 20 side where the connecting portion 40 is located. A recessed portion 38 that is recessed in the groove, or a penetrating portion that penetrates in the thickness direction of the absorber 31. The “concave portion” referred to here may be a groove formed by squeezing the absorbent material constituting the absorbent body 31. In addition, the “concave portion” is a mode in which a small partial region is recessed as compared with a large portion of the surface of the absorber 31, and the small partial region may constitute a concave portion, or the absorber. In a mode in which a part of a small area is convex as compared with the most part of the surface of 31, most of the surface may constitute a “concave part”. The “penetrating portion” is a region where the absorbent material and other materials do not exist in the thickness direction of the absorber 31. The through portion may be a through hole or a slit.

As in the above-described configuration, by forming the concave portion 38 or the penetration portion at the longitudinal end portion of the absorbent body 31 on the side where the connecting portion 40 is provided, the concave portion 38 or the penetration portion allows the tack and the wearer to A gap can be secured between the skin. Thereby, the air permeability in the state in which the connecting portion 40 is folded can be improved. Moreover, even if the tack of the connecting portion 40 is in a state of being crushed by clothes, by forming the recess 38 or the penetration portion at the end of the absorbent body 31, the gap between the tack and the wearer's skin can be obtained. As a result, a gap is generated, so that moisture can be prevented from accumulating there. In the present invention, the end in the longitudinal direction of the absorber 31 is, for example, a length of 30% in the central direction from each edge in the longitudinal direction when the length in the longitudinal direction of the absorber 31 is 100%. Each region may have the same width as the entire width of the absorber 31. The recess 38 may be formed not only at the end but over the entire area of the absorber 31. Moreover, the recessed part 38 may be formed in the anti-wearer side surface on the opposite side to a wearer side surface so that air permeability can be improved so that it may mention later. Furthermore, when the absorber 31 has the recessed part 38, it is preferable that the recessed part 38 is formed so that a depth may become shallow toward an edge part from the center part of the longitudinal direction of a disposable diaper.

In the present invention, the connecting portion 40 has an intermediate region 43 located between the mountain fold portion 41 and the valley fold portion 42. The intermediate region 43 preferably overlaps in the thickness direction with the region where the concave portion 38 or the penetrating portion of the absorber 31 is formed in a state where the connecting portion 40 is folded at the mountain fold portion 41 and the valley fold portion 42. If it does in this way, it will be in the state where the edge part of absorber 31 is inserted in the space formed by the tack of connecting part 40. Thereby, the bodily fluid and soft stool that have flowed in the longitudinal direction of the absorbent body 31 can be introduced into the space inside the tack, and the bodily fluid and soft stool can be absorbed by the absorbent body 31, so that leakage of bodily fluid can be prevented. Further, even when the end portion of the absorber 31 overlaps with the tack as described above, since the concave portion 38 or the through portion is formed at the end portion, air permeability at the portion can be ensured. it can.

In the present invention, the intermediate region 43 of the connecting portion 40 is a portion that faces the skin facing surface side of the intermediate region 43 and the skin non-facing surface when the connecting portion 40 is folded at the mountain fold portion 41 and the valley fold portion 42. It is preferable to have the joining area | region 43a joined so that peeling or the non-peeling is possible with respect to both or any one site | part which faces the side. In addition, the intermediate | middle area | region 43 may be joined not only the site | part which faces the skin opposing surface side but the site | part which faces the skin non-opposing surface side in the joining area | region 43a. In this case, it is preferable that the joining area | region 43a is located in the area | region where the intermediate | middle area | region 43 and the absorptive main body 31 of the connection part 40 do not overlap in the thickness direction. Thus, when the connection part 40 is joined with the facing part by the joining area | region 43a which can peel, the connection part 40 is expand | deployed in the longitudinal direction of a disposable diaper by peeling this joining area | region 43a as needed. It becomes possible. Moreover, when the connection part 40 is partially joined with the facing part by the joining area | region 43a which cannot be peeled, it is possible to expand | deploy the connection part 40 in the longitudinal direction of a disposable diaper in the non-joining area | region 43b as needed. It becomes. In the pants-type disposable diaper, the so-called side seal portion 4 can also be interpreted as functioning as the joining region 43a.

In the present invention, the absorbent body 31 of the absorbent main body 30 may be folded back at the mountain folded portion 41 of the connecting portion 40. That is, the absorbent body 31 of the absorbent main body 30 extends long in the longitudinal direction beyond the mountain fold portion 41 of the connecting portion 40, and a part of the absorbent body 31 is folded back along the mountain fold portion 41, and the two in the thickness direction. It will overlap. In the present invention, being folded is not necessarily limited to being completely N-shaped, and it is sufficient that the surface is reversed along the longitudinal direction. For example, the mountain fold 41 and the valley fold 42 may be composed of a U-shaped folded portion and an inverted U-shaped folded portion.

As described above, a part of the absorber 31 is folded back along the mountain fold 41 of the connecting portion 40, so that the space inside the tack can be reliably held by the rigidity of the absorber 31. For this reason, even if it receives external force in the thickness direction from the outer surface side of a disposable diaper, the space inside a tack becomes difficult to be crushed. If it does so, the moisture collected in the disposable diaper will be introduced into the space inside the tack, and it will diffuse along the space in the width direction of the diaper and be easily discharged outside. As a result, the breathability inside the diaper is improved and the comfort of the diaper can be increased.

In this invention, the absorber 31 is more than the thickness of the said absorber 31 in the center part of the longitudinal direction of a disposable diaper in the front body exterior body 10 side and the back body exterior body 20 side both or any one edge part. It is preferable to have a thin-walled region 39 where the thickness of the absorber 31 is thin, or a low basis weight region where the basis weight of the absorber 31 is smaller than the basis weight of the absorber 31 at the center in the longitudinal direction of the disposable diaper. . The thin 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 in the longitudinal direction of the absorber 31. The low basis weight region is a portion where the basis weight of the absorbent body 31 is smaller than the central part in the longitudinal direction, and is located at the end part in the longitudinal direction of the absorbent body 31. The absorbent body 31 is brought into contact with the wearer by the exterior body of the disposable diaper (the front body exterior body 10 and the back body exterior body 20), but between the region where there is no absorbent body of the disposable diaper and a certain region. A step occurs. If the wearer sits down or sleeps in a state where there is a step, the step may locally apply pressure to the wearer's skin, which may cause pain, discomfort, or discomfort. When the outline (end part) of the absorber 31 is thin or the basis weight is small, it is possible to prevent local pressure from being applied to the skin due to the step. For the same reason, when the absorber 31 has the recess 38 or the through portion, the peripheral region of the recess 38 and the through portion may be a thin region 39 or a low basis weight region. It is because it can prevent that a wearer's skin is locally pressurized by the level | step difference of the recessed part 38 and a penetration part, and a part other than that.

As described above, the air permeability in the vicinity of the end can be improved by reducing the thickness of the end in the longitudinal direction of the absorber 31 or by reducing the basis weight of the end. In particular, as described above, when the end portion of the absorbent body 31 is folded along the mountain-folded portion 41 of the connecting portion 40, the folded portion of the absorbent body 31 is set as the thin region 39 or the low basis weight region. Is effective. The thickness of the central portion in the longitudinal direction of the absorber 31 is usually 3 to 6 mm, and preferably 4 to 5 mm. In this case, the thickness of the thin region 39 is preferably 1 to 4 mm. When the thickness of the thin region 39 is within this range, the absorber 31 is less likely to lose its shape. When the absorber 31 has a low basis weight region at the end, the basis weight of the low basis weight region is preferably 10 to 80% when the basis weight of the absorber 31 in the central portion in the longitudinal direction is 100%. More preferably, it is 20 to 75%, and further preferably 30 to 70%.

According to the present invention, in the disposable diaper separated into the front body exterior body, the back body exterior body, and the absorbent main body, it is possible to improve the air permeability of the portion where the tack is formed.

FIG. 1 is an external perspective view schematically showing a disposable diaper according to an embodiment of the present invention. FIG. 2 is a developed view showing 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 the tack is developed from the state shown in FIG. FIG. 5 is an external perspective view showing a state where the tack is unfolded from the state shown in FIG. 6 is an enlarged vertical cross-sectional view of a main part in which a rear body side of the vertical cross-sectional view shown in FIG. 3 is enlarged. FIG. 7 is a cross-sectional view corresponding to FIG. 6 showing a modification of the disposable diaper according to the present invention.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. This invention is not limited to the form demonstrated below, The thing suitably changed in the range obvious to those skilled in the art from the following forms is also included.

In the present specification, the “longitudinal direction” is the front-rear direction of the disposable diaper, and means the direction connecting the front body and the back body of the disposable diaper. The “width direction” means a direction orthogonal to the longitudinal direction in a plane. In the drawings of the present application, the “longitudinal direction” is indicated by the Y axis, and the “width direction” is indicated by the X axis.
In the specification of the present application, the “skin facing surface” means a surface facing the wearer's skin when the disposable diaper is worn. In addition, the “non-skin facing surface” means a surface that does not face the wearer's skin in a wearing state of the disposable diaper, that is, a surface opposite to the skin facing surface.
In the present specification, “A to B” means “A or more and B or less”.

[Exterior body and absorbent body]
FIG. 1 is an external perspective view of a disposable diaper according to an embodiment of the present invention. FIG. 2 is a development view of the disposable diaper shown in FIG. 1 and shows a state in which the diaper is viewed in plan from the skin facing surface side. 3 is a longitudinal sectional view of the disposable diaper shown in FIG. 1, and shows a sectional structure taken along the line III-III shown in FIG. In the present specification, the present invention will be described by taking as an example a case where the present invention is applied to a pants-type disposable diaper. However, the present invention is not limited to a pants-type disposable diaper, but can also be applied to a tape-type disposable diaper.

As shown in FIGS. 1 to 3, a disposable diaper 100 according to the present invention includes a front body 1 in contact with the wearer's abdomen, a back body 2 in contact with the wearer's back in the longitudinal direction (Y-axis direction), and The crotch part 3 is divided between the front body 1 and the back body 2. In the present embodiment, the front body exterior body 10 is positioned on the front body 1, and the back body exterior body 20 is positioned on the back body 2. In addition, an absorbent main body 30 is positioned in the crotch part 3, and the absorbent main body 30 extends in the longitudinal direction from the crotch part 3 to the front body 1 and the back body 2. For this reason, as for the absorptive main body 30, the edge part on the front body 1 side overlaps with the front body exterior body 10 in the thickness direction, and the edge part on the back body 2 side overlaps with the back body exterior body 20 in the thickness direction. In the present invention, the front body exterior body 10, the back body exterior body 20, and the absorbent main body 30 are basically configured as separate bodies. In this embodiment, each exterior body 10 and 20 is formed in the substantially rectangular shape long in the width direction in planar view. Moreover, the absorptive main body 30 is formed in the substantially rectangular shape long in a longitudinal direction in planar view. However, the shape of each exterior body 10 and 20 and the absorptive main body 30 is not restricted to what was illustrated, It can deform | transform suitably in the range which can exhibit the function of this invention.

Further, side seal portions 4 are provided at both left and right end portions in the width direction (X-axis direction) of the front body exterior body 10 and the rear body exterior body 20. In the side seal portion 4, the facing portions of the left and right ends of the front body exterior body 10 and the rear body exterior body 20 are joined to each other. As a joining method, for example, a known method such as heat sealing, ultrasonic sealing, or adhesion using a hot melt adhesive can be employed. As shown in FIG. 1, the front body exterior body 10 and the rear body exterior body 20 are joined at the side seal portion 4, so that the exterior bodies 10 and 20 are connected in a ring shape. The waist opening 5 is defined by the upper edges of the front body exterior body 10 and the rear body exterior body 20. Further, the absorbent main body 30 is disposed so as to be bridged from the lower end portion of the front body exterior body 10 to the lower end portion of the rear body exterior body 20. For this reason, the left and right leg openings 6 are defined by the left and right side edges of the absorbent main body 30 and the lower edges of the exterior bodies 10 and 20. The wearer can wear the pants-type disposable diaper 100 by inserting both legs from the waist opening 5 and taking out one leg from the left and right leg openings 6.

As shown in FIG. 3, each of the exterior bodies 10 and 20 includes inner sheets 11 and 21 located on the skin facing surface side, outer sheets 12 and 22 located on the skin non-facing surface side, an inner sheet and an outer sheet. 1 or a plurality of waist elastic members 13 and 23 located between. When there are a plurality of waist elastic members 13 and 23, they are arranged at predetermined intervals in the longitudinal direction. The waist elastic members 13 and 23 are sandwiched and fixed between the inner sheets 11 and 21 and the outer sheets 12 and 22 in a state of extending in the width direction of the diaper. For example, a hot melt adhesive or the like may be directly applied to the stretched waist elastic members 13 and 23, and the adhesive applied may be disposed between the inner sheets 11 and 21 and the outer sheets 12 and 22. . Thereby, when the waist elastic members 13 and 23 contract, the inner sheets 11 and 21 and the outer sheets 12 and 22 bend to form a plurality of fine wrinkles (waist gathers). The number of the waist elastic members 13 and 23 arranged is not particularly limited, but for example, 3 to 20 or 4 to 15 is preferable.

As the sheet members for forming the inner sheets 11 and 21 and the outer sheets 12 and 22, a known material can be used, and is not particularly limited, but is preferably formed of a non-woven fabric having a good touch. Examples of the nonwoven fabric include air-through nonwoven fabric, point bond nonwoven fabric, spunbond nonwoven fabric, airlaid nonwoven fabric, melt blown nonwoven fabric, SMS nonwoven fabric, and SMMS nonwoven fabric. Further, as the elastic members 13 and 23, known elastic elastic members can be used. For example, thread elastic rubber can be suitably used. As such a rubber material, materials such as styrene rubber, olefin rubber, urethane rubber, ester rubber, polyurethane, polyethylene, polystyrene, styrene butadiene, silicone, and polyester can be used.

Further, as shown in FIG. 3, the outer sheets 12, 22 are extended upward in the longitudinal direction from the inner sheets 11, 21, and the extended portions are skin facing surfaces at the edge of the waist opening 5. It may be folded back and joined to the skin facing surfaces of the inner sheets 11 and 21. By doing in this way, the touch of the waist opening part 5 can be made soft.

As shown in FIG. 3, the absorbent main body 30 basically includes an absorbent body 31 that absorbs and retains body fluid, a liquid-permeable top sheet 32 that covers the skin-facing surface of the absorbent body 31, and A liquid-impermeable back sheet 33 that covers the non-skin facing surface of the absorber 31 is provided. The top sheet 32 and the back sheet 33 are joined at the periphery of the absorber 31. The body fluid excreted from the wearer's crotch passes through the top sheet 32 and is guided to the absorber 31, and leakage to the outside is prevented by the back sheet 33.

The absorber 31 is a member for absorbing body fluid such as urine and holding the absorbed body fluid. The absorber 31 is normally configured by encapsulating an absorbent material with a core wrap sheet such as tissue paper. A well-known material can be employ | adopted for the absorptive material which comprises the absorber 31. FIG. As an absorptive material, it is good also as using a fluff pulp, a superabsorbent polymer, or a hydrophilic sheet, for example. In addition, as the absorbent material, one type of fluff pulp, superabsorbent polymer, or hydrophilic sheet may be used alone, or two or more types may be used in combination. As the absorbent material, a material formed in a single-layer or multi-layer mat shape is usually used. The shape of the absorber 31 can be appropriately designed according to the shape, size, and application of the disposable diaper. For example, the shape of the absorber 31 may be an hourglass shape as shown in FIG. 2, or may be a rectangular shape, an elliptical shape, or a gourd shape that is generally used. In addition, as shown in FIG. 2, the absorbent body 31 has a recess 38 formed at the end in the longitudinal direction. In FIG. 2, although the form in which the recessed part 38 was formed is shown, the penetration part may be formed in the same position. Details of the recess 38 will be described later.

The top sheet 32 is a member that is in direct contact with the skin of the wearer's crotch and allows body fluid such as urine to pass through the absorber 31. For this reason, the top sheet 32 is made of a liquid-permeable material having high flexibility. In the present specification, “liquid permeability” means, for example, the property of permeating water in a time of less than 1 minute when 5 ml of water at room temperature is placed thereon under standard atmospheric pressure. To do. Moreover, the example of the liquid-permeable material which comprises the top sheet 32 is a woven fabric, a nonwoven fabric, or a porous film. Further, for example, a thermoplastic resin fiber such as polypropylene, polyethylene, polyester, or nylon may be hydrophilized and further made into a nonwoven fabric.

The back sheet 33 prevents body fluid that has passed through the top sheet 32 and is absorbed by the absorber 31 from leaking to the outside. For this reason, the back sheet 33 is made of a liquid-impermeable material. In this specification, “liquid impermeability” means, for example, the property that, when 5 ml of room temperature water is placed thereon under standard atmospheric pressure, the water does not permeate even after 1 minute or more. means. An example of the liquid-impermeable material constituting the back sheet 33 is a plastic film made of polyethylene resin or the like. In particular, as the back sheet 33, it is preferable to use a microporous polyethylene film in which a plurality of fine pores of 0.1 to 4 μm are formed.

Further, the absorbent main body 30 has a cover sheet 34 on the skin non-facing surface side of the back sheet 33 in addition to the above configuration. The cover sheet 34 is bonded to the non-skin facing surface of the back sheet 33 in order to cover the back sheet 33 and improve its feel. As a material constituting the cover sheet 34, a woven fabric or a non-woven fabric may be used. In particular, as a material constituting the cover sheet 34, it is preferable to use a nonwoven fabric or a wet nonwoven fabric made of a thermoplastic resin such as polyethylene, polypropylene, or polyester.

Moreover, the absorptive main body 30 has the member for comprising a three-dimensional gather in addition to the said structure. The three-dimensional gather is a pair of side sheets 35 having water repellency arranged along the left and right side edges of the absorber 31 and one or a plurality of three-dimensional gathers arranged at the inner edge in the width direction of the side sheet 35. The elastic member 36 is used. The side sheet 35 has a fixed portion fixed along the longitudinal direction with respect to the skin-facing surface of the top sheet 32 and a free end portion that is positioned on the inner side in the width direction than the fixed portion and is not fixed to the top sheet 32. ing. And the three-dimensional gather expansion-contraction member 36 is being fixed to the free end part of this side seat | sheet 35 along the longitudinal direction in the expansion | extension state. For this reason, when the three-dimensional gather expansion / contraction member 36 contracts, the free end portion of the side seat 35 rises by receiving the contraction force to form a three-dimensional gather. The three-dimensional gather formed in this way stands along both side edges of the absorbent body 31 and functions as a leak-proof wall for preventing side leakage of body fluid excreted by the wearer.

Further, the absorbent main body 30 has leg elastic members 37 along the left and right side edges in the width direction of the absorbent main body 30 in addition to the above configuration. The leg elastic member 37 is fixed to the skin non-facing surface of the side sheet 35 in an extended state along the longitudinal direction, for example. When the leg elastic member 37 contracts, the side sheet 35 bends to form a plurality of fine wrinkles (leg gathers).

[Connecting part]
The disposable diaper 100 which concerns on this invention is further provided with the connection part 40 for connecting the absorptive main body 30 to both the front body exterior body 10, the back body exterior body 20, or any one exterior body. In the embodiment described in the present specification, as the connecting portion 40, the front side connecting member 40 </ b> A that connects the absorbent main body 30 and the front body exterior body 10, and the back after connecting the absorbent main body 30 and the rear body exterior body 20. A side connecting member 40B is provided. In addition, in this invention, the connection part 40 should just be provided in at least one of the front body 1 side and the back body 2 side. In particular, it is preferable that the connecting portion 40 is provided with at least one connecting the absorbent main body 30 and the back body exterior body 20.

As shown in the cross-sectional view of FIG. 3, in the present embodiment, the front side connecting member 40A is a separate member from the front body exterior body 10 and the absorbent main body 30, and similarly, the rear side connecting member 40B is a separate member from the back body exterior body 20 and the absorbent main body 30. However, although illustration is omitted, the front connecting member 40 </ b> A (the connecting portion 40) may be formed as a member integrated with the front body exterior body 10 or formed as a member integrated with the absorbent main body 30. Also good. Similarly, the rear side connecting member 40 </ b> B (the connecting portion 40) may be formed as a member integral with the back body exterior body 20, or may be formed as a member integral with the absorbent main body 30.

As shown in FIGS. 2 and 3, the front and rear connecting members 40A and 40B are arranged on the skin non-facing surface side of each of the exterior bodies 10 and 20 and the absorbent main body 30, and each exterior in the width direction. It is formed to have substantially the same width as the bodies 10 and 20. Each connecting member 40A, 40B overlaps with a part in the longitudinal direction of each exterior body 10, 20, and the width direction both ends of each connecting member 40A, 40B are side-sealed at a portion excluding the overlapping portion. That is, the side seal portions 4 are provided on the left and right ends in the width direction of the connecting members 40A and 40B at portions other than the exterior bodies 10 and 20 and the overlapping portion. Further, both end portions in the width direction of the exterior bodies 10 and 20 are side seal portions 4 except for the overlapping portions of the connecting members 40A and 40B. The front side connecting member 40A and the rear side connecting member 40B are joined to each other at the left and right side seal portions 4 to form a pants shape.

As shown in FIG. 3, each of the connecting members 40A and 40B is folded into a substantially cross-sectional N shape, and the skin facing surface side region at the upper end of each of the connecting members 40A and 40B is formed in each of the exterior bodies 10 and 20. The area | region of the skin opposing surface side is joined to the absorptive main body 30 in the lower end of each connection member 40A, 40B. If demonstrating it concretely, 40A, 40B will have the mountain fold part 41 which protrudes upwards in a wearing condition, and the valley fold part 42 which protrudes downward in a wearing condition. In the present embodiment, when the mountain fold 41 and the valley fold 42 are compared, the mountain fold 41 is relatively located on the skin non-facing surface and the valley fold 42 is located on the skin facing surface. These mountain folds 41 and valley folds 42 extend linearly along the width direction of the connecting members 40A and 40B. Therefore, by folding along the mountain fold portion 41 and the valley fold portion 42, each of the connecting members 40A and 40B has a substantially N-shaped cross section and includes 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 mountain fold 41 and the valley fold 42 is referred to as “tack”. In the present embodiment, each of the connecting members 40A and 40B has a substantially cross-sectional N-shape, but is not limited thereto, and may have a substantially cross-section inverted N-shape or a structure having a plurality of tacks.

Further, as shown in FIG. 3, each of the connecting members 40 </ b> A and 40 </ b> B can be divided into an intermediate region 43, an inner region 44, and an outer region 45 with the mountain fold 41 and the valley fold 42 as boundaries. it can. The intermediate region 43 is a region located between the mountain fold 41 and the valley fold 42. Moreover, the inner side area | region 44 is an area | region which has the joining site | part 44a extended upward toward the each exterior body 10 and 20 side from the valley fold part 42, and joined to the skin non-facing surface side of the said exterior body. In the example of FIG. 3, the entire inner region 44 is a joint portion 44 a, but it is only necessary that at least a part of the inner region 44 is joined to each of the exterior bodies 10 and 20. The outer region 45 is a region having a joint portion 45 a that extends downward from the mountain fold 41 toward the absorbent main body 30 and is joined to the skin non-facing surface side of the absorbent main body 30. In the example of FIG. 3, a part of the region on the lower end side (the crotch side) of the outer region 45 is a bonding portion 45 a, but the entire outer region 45 is bonded to the absorbent main body 30. Also good. Each joint part 44a and 45a demonstrated here is realizable using well-known adhesives, such as a hot-melt-adhesive.

In the example shown in FIG. 3, the inner regions 44 of the connecting members 40 </ b> A and 40 </ b> B are joined to the skin non-facing surfaces at the lower end portions in the longitudinal direction of the exterior bodies 10 and 20. Further, the outer region 45 of each of the connecting members 40 </ b> A and 40 </ b> B is joined to the skin non-facing surface of the upper end portion in the longitudinal direction of the absorbent main body 30. In this way, the connecting members 40A and 40B act to connect the exterior bodies 10 and 20 and the absorbent main body 30 together. Here, an example is shown in which the inner region 44 of each of the connecting members 40A and 40B is joined to the lower end side of each of the exterior bodies 10 and 20. However, the inner region 44 can be joined to the upper end side of each of the exterior bodies 10 and 20. The position where the inner region 44 is joined to the skin non-facing surface of each of the exterior bodies 10 and 20 can be designed freely to some extent.

Further, referring back to FIG. 2, the connecting members 40 </ b> A and 40 </ b> B are folded at the mountain fold 41 and the valley fold 42. In this state, the intermediate region 43 has a joint region 43a that is detachably joined to a portion facing the skin facing surface side in at least a part of the entire region in the width direction. In the example shown in FIG. 2, a joining region 43 a is partially formed in the intermediate region 43, and a portion other than that portion is a non-joining region 43 b. For example, referring to the example of FIG. 3, the inner region 44 is located on the skin facing surface side of the intermediate region 43, and at least the intermediate region 43 and the inner region are present in the bonding region 43 a shown in FIG. 2. 44 is joined. In addition, in the joining area | region 43a, it replaces with the inner side area | region 44, or the inner side area | region 44 may be joined with the outer side area | region 45 or the absorptive main body 30 located in the skin non-facing surface side with the inner side area | region 44. Thus, in the joining area | region 43a, each connection member 40A, 40B is fixed to the folded state, It is restrict | limited so that it may not expand | deploy carelessly. By peeling off the joining region 43a, the connecting members 40A and 40B can be developed. FIG. 3 shows a longitudinal sectional view of the non-bonding region 43b.

In FIG. 2, the joining region 43a is conceptually shaded. In the example shown here, the joining regions 43a are on the left and right sides in the width direction of the region where the absorbent main body 30 is located, in the region where the connecting members 40A and 40B and the exterior bodies 10 and 20 overlap in the thickness direction. It is provided and is arranged so as not to overlap with the absorbent main body 30. That is, in a plan view, a longitudinal range of a portion where each of the exterior bodies 10 and 20, each of the connecting members 40 </ b> A and 40 </ b> B, and the absorbent main body 30 overlaps is a non-joining region 43 b. As described above, the bonding region 43a may be defined as a region having a certain width in the width direction as long as it does not overlap the absorbent main body 30. However, in the pants-type diaper, the above-described side seal portion 4 itself functions as the joining region 43a. For this reason, in a pants-type diaper, it can be said that it is not always necessary to join the connecting members 40 </ b> A and 40 </ b> B and the exterior bodies 10 and 20 using a hot melt adhesive or the like separately from the side seal portion 4. That is, the joining region 43a shown by hatching in FIG. 2 can be omitted.

According to the above-described configuration, the deployability of the tack is improved by providing the connecting portion 40 separately between the absorbent main body 30 and the exterior bodies 10 and 20 to form a tack. That is, it can be said that when the absorbent main body 30 is pulled, the connecting portion 40 follows and the tack is developed, so that the tack is easily developed. And if a tack | tuck is expand | deployed, when a tack | tuck is pushed by the clothes etc. which a wearer wears, it will function like a pump and the effect which discharges the moisture accumulated in the inside of a diaper can also be anticipated. Further, by connecting the respective exterior bodies 10, 20 and the absorbent main body 30 by the respective connection members 40A, 40B, when the respective connection members 40A, 40B forming a tack are unfolded, the respective exterior bodies 10, 20 and the absorptive main body 30 can be spaced apart in the longitudinal direction and extended in the longitudinal direction of the disposable diaper. In FIGS. 4 and 5, the connecting members 40 </ b> A and 40 </ b> B are expanded by peeling off the joining region 43 a, and the space defined by these connecting members is expanded, and the exterior bodies 10 and 20 and the absorbent main body 30 are expanded. Conceptually shows the state of being separated from each other. Thus, it becomes the structure which can expand | deploy the connection members 40A and 40B as needed, so that each exterior body 10 and 20 and the absorptive main body 30 track according to a wearer's motion. Thus, it is possible to effectively prevent a gap from being generated between the wearer's skin and the diaper. Moreover, since the fitting property of the diaper with respect to a wearer's skin increases, a feeling of wear improves. When the joint region 43a described above is peelable in the longitudinal direction, the connecting members 40A and 40B can be developed as shown in FIGS. 4 and 5 by peeling the joint region 43a.

Moreover, as FIG.2 and FIG.3 shows, in the state which each connection member 40A, 40B was completely folded along the mountain fold part 41 and the valley fold part 42, each connection member 40A, 40B is the absorptive main body 30. It is preferable to cover the skin facing surface at the end in the longitudinal direction. That is, it is preferable that the intermediate region 43 of the connecting portion 40 overlaps the absorbent body 31 of the absorbent main body 30 in the thickness direction in a state where the connecting members 40A and 40B are folded. In this case, as shown in FIG. 3, in order from the skin facing surface side, the exterior bodies 10 and 20, the outer region 44 of the connecting member, the intermediate region 43 of the connecting member, the absorbent body 31 of the absorbent main body, and the outer side of the connecting member The region 45 is overlapped in the thickness direction. Thereby, it will be in the state where the longitudinal direction edge part of the absorber 31 of an absorptive main body was accommodated in the space inside the tack | tuck formed in each connection member 40A, 40B. Here, the “space inside the tack” is a space having a downward opening extending below the mountain-folded portion 41 between the intermediate region 43 and the outer region 45 of each connecting member 40A, 40B. And it is preferable that the longitudinal direction edge part of the absorber 31 which comprises the absorptive main body 30 is accommodated in the space inside such a tack | tuck. Thereby, it becomes possible to accommodate the bodily fluid and the soft stool which flowed along the longitudinal direction of the absorptive main body 30, and can prevent leaking outside.

Further, when the connecting members 40A and 40B are in the folded state, a space is formed, so that moisture accumulated inside the disposable diaper in the worn state is guided to this space. And the space inside this tack has spread in the width direction of a disposable diaper. For this reason, the moisture introduced into this space can be diffused in the width direction of the disposable diaper. As a result, the air permeability in the vicinity of the end portion in the longitudinal direction of the absorbent main body 30 is improved, and the inside of the disposable diaper is not easily stuffy.

As shown in FIG. 2, when joint regions 43 are provided on the left and right sides of the absorbent main body 30 in the width direction, the mountain folds 41 of the connecting members 40 </ b> A and 40 </ b> B extending along the width direction (see FIG. 3). ), The edge of the joining region 43a extending along the longitudinal direction, the intermediate region 43, and the outer region 45 define a space having a downward opening. And the edge part of the longitudinal direction of the absorptive main body 30 can be accommodated in this space. In particular, it is preferable that the longitudinal end portion of the absorbent body 31 constituting the absorbent main body 30 is accommodated in the space defined here.

The intermediate region 43 may be bonded to the inner region 44 or the outer region 45 in the bonding region 43a so as not to be peeled off. In this case, in the non-joining region 43b, since the intermediate region 43 is not joined to the part located on the skin facing surface side and the skin non-facing surface side, the connecting members 40A and 40B are provided as necessary. It is possible to develop freely. In this case, for example, when the wearer starts exercising, the tack of each of the connecting members 40A and 40B is developed in the non-joining region 43b. When the non-deployed state and the unfolded state of each connecting member 40A, 40B are repeated by the wearer's movement, the space defined by each connecting member expands or narrows. It functions like this and exhausts the air accumulated in this space. By utilizing the development of the tack in this manner, the moisture accumulated in the space of each connecting member 40A, 40B can be easily discharged, and the air permeability of the portion where the tack is formed can be enhanced. Moreover, although the side seal was carried out except the overlapping part with the exterior bodies 10 and 20 also at the left and right ends in the width direction of the connecting members 40A and 40B, the overlapping part can be peeled off together with the exterior bodies 10 and 20 or cannot be peeled off. A side seal may be used. When the overlapping portion is side-sealed together with the exterior bodies 10 and 20, the joining region 43a can be omitted. Further, the entire longitudinal direction of the left and right end portions of the connecting members 40A and 40B in the width direction may be side-sealed separately from the exterior bodies 10 and 20 so as not to be peeled off.

As described above, the joining region 43a for joining the intermediate region 43 and the facing portion thereof may be either a peelable temporary joint or a non-peelable joint. Both the detachable temporary bonding and the non-peelable bonding in the bonding region 43a described here can be realized by using a known adhesive such as a hot-melt adhesive, and the application amount and adhesion of the adhesive What is necessary is just to select what can peel and what cannot peel by adjusting force. The detachable joining state is assumed to be peeled in advance, for example, and can join both the intermediate region 43 and the sheet member constituting the facing portion without causing breakage or breakage. Means state. On the other hand, the non-peelable joining state is, for example, a joint that is not supposed to be peeled in advance, and tearing or breakage occurs in the sheet member constituting the intermediate region 43 or the facing portion when it is peeled off. Means state. The joining region 43a may extend over the entire width direction of the intermediate region 43. In this case, the joining region 43a joins the intermediate region 43 to the facing part so as to be peelable (that is, temporarily joined). It is. In addition, the joining region 43a may be one that joins the intermediate region 43 to the facing portion so as not to be peeled off. In that case, the joining region 43a is partially provided in the width direction of the intermediate region 43. It will be a thing.

[Sheet stacking structure of connecting part]
Then, with reference to FIG. 6, structures, such as a sheet member which comprises the connection part 40 ( connection member 40A, 40B), are demonstrated. FIG. 6 is an enlarged view of the periphery of the rear connecting member 40B shown in FIG. Hereinafter, the structure of the rear connection member 40B will be described as an example, but the structure of the rear connection member 40B described here can be applied to the front connection member 40A.

As shown in FIG. 6, the rear connecting member 40B has a structure in which at least two sheet members are laminated in the thickness direction. That is, in the example shown in FIG. 6, the rear connecting member 40 </ b> B has a leak-proof sheet 51 and an outer surface sheet 52 bonded to the skin non-facing surface side.

The leak-proof sheet 51 is a liquid-impermeable sheet member, and is disposed for the purpose of preventing body fluid from leaking from the rear connection member 40B. The leak-proof sheet 51 is preferably a plastic film made of polyethylene resin or the like, like the back sheet 33 described above. In particular, as the leakage preventing sheet 51, it is preferable to use a microporous polyethylene film in which a plurality of fine pores of 0.1 to 4 μm are formed in order to ensure the air permeability of the rear side connecting member 40B. Since the leak-proof sheet 51 is formed of a sheet member having air permeability and liquid impermeability, it is possible to prevent the body fluid from reaching the rear connection member 40B from being leaked and to suppress the occurrence of stuffiness. can do.

The outer surface 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 leak-proof sheet 51 on the non-skin facing surface. Although the nonwoven fabric used here is not specifically limited, An air through nonwoven fabric, a point bond nonwoven fabric, a spun bond nonwoven fabric, an airlaid nonwoven fabric, a melt blown nonwoven fabric, an SMS nonwoven fabric, an SMMS nonwoven fabric, etc. can be mentioned. Basically, as the outer sheet 52, a sheet member having liquid permeability and air permeability and good touch is adopted.

In addition, as shown in FIGS. 3 to 6, in the present embodiment, each of the connecting members 40 </ b> A and 40 </ b> B on the front side and the rear side of the disposable diaper is one or a plurality of connecting portion expansion / contractions arranged along the mountain folded portion 41. It is preferable to have the member 46. The connection part expansion / contraction member 46 is an elastic expansion / contraction member such as a thread elastic rubber, and is disposed in the mountain fold part 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 configured by laminating the leak-proof sheet 51 and the outer sheet 52, the connecting portion expansion / contraction member 46 is fixed between the leak-proof sheet 51 and the outer sheet 52. do it. By arranging the connecting portion expansion / contraction member 46 along the mountain-folded portion 41, the contracting action of the connecting portion expansion / contraction member 46 causes the intermediate region 43 of each connection member 40 </ b> A, 40 </ b> B and each exterior body 10, 20. It becomes difficult to produce a gap between them. For this reason, the appearance of the diaper is good and the fit is improved.

As shown in FIGS. 1 and 2, a plurality of tammy stretchable members 47 extending along the width direction are arranged in the connecting members 40 </ b> A and 40 </ b> B at predetermined intervals in the longitudinal direction of the disposable diaper. ing. The tammy expansion and contraction member 47 is fixed to the connecting members 40A and 40B in a state of extending along the width direction of the disposable diaper. However, the Tammy stretchable member 47 is not disposed at the center in the width direction of each of the connecting members 40A and 40B, or is partially cut so as not to exhibit stretchability. That is, the Tammy stretchable member 47 is basically located on both sides of the absorbent main body 30 in the width direction. In addition, the tammy stretchable member 47 may partially overlap the both ends of the absorbent main body 30 in the width direction. Each tammy elastic member 47 may be fixed between the leak-proof sheet 51 and the outer surface sheet 52 in the same manner as the connecting part elastic member 46 described above. When the tammy expansion and contraction member 47 contracts, the connecting members 40A and 40B are bent to form a plurality of fine wrinkles (tammy gathers).

[Concavity of absorber]
The recessed part 38 formed in the absorber 31 of the absorptive main body 30 is demonstrated with reference to FIGS. The absorbent body 31 is recessed in the thickness direction in the recess 38 as compared with the adjacent surrounding portions. For example, the recess 38 may be a groove formed by squeezing an absorbent material constituting the absorber 31. Or you may form the absorber 31 so that the absorber 31 may have the recessed part 38 previously. Further, the absorbent body 31 may have a penetrating portion penetrating in the thickness direction instead of the concave portion 38. An example of the through portion is a through hole or a slit. When the recess 38 is groove-shaped, it is preferable that the skin-facing surface of the absorber 31 is recessed, but the skin-non-facing surface of the absorber 31 may be recessed, What dented both the skin opposing surface and the skin non-opposing surface may be used. Since the absorbent main body allows air to pass through in the thickness direction, even if there is a recess on the back side of the absorber 31, moisture is once released in the thickness direction and then exists between the absorber and the backsheet. It can flow to the end of the absorber through the recessed portion to reach the connecting portion. Therefore, even if the recessed part 38 is formed in the anti-wearer surface side, the effect which prevents that moisture accumulates is exhibited. In the case where the recess 38 is groove-shaped, the thickness of the absorber 31 at the site where the recess 38 is formed is 10 to 10% when the thickness of the absorber 31 at the site where the recess 38 is not formed is 100%. It may be 90%, 15 to 80%, or 20 to 70%.

Also, the recess 38 is formed at the end of the absorber 31 in the longitudinal direction. Specifically, the recess 38 is formed in a range where the absorber 31 overlaps with each of the connecting members 40A and 40B and each of the exterior bodies 10 and 20 (within the range of the front body 1 and the back body 2 shown in FIG. 2). It is preferable. In particular, the recess 38 is preferably formed at least in a range where the absorbent body 31 overlaps each of the exterior bodies 10 and 20. In the example shown in FIG. 2, connecting members 40 </ b> A and 40 </ b> B are provided on both the front body 1 and the back body 2. For this reason, it is preferable that the recessed part 38 of the absorber 31 is also formed in both the edge part of the front body 1 side, and the edge part of the back body 2 side. However, the recessed part 38 of the absorber 31 should just be formed in the edge part by the side in which the connection members 40A and 40B are provided at least. For this reason, it is not always necessary to form the recesses 38 at both ends in the longitudinal direction of the absorber 31.

In the example shown in FIG. 2, the recesses 38 are formed in a linear shape, and a plurality of linear recesses 38 intersect to form a lattice pattern. More specifically, in the example of FIG. 2, a plurality of linear recesses 38 form a rhombic lattice pattern. The “rhombic grid pattern” as used herein refers to an oblique pattern in which a plurality of linear concave portions 38 extending in a direction inclined in the longitudinal direction and the width direction (that is, an oblique direction) intersect in a plan view. A pattern in which non-recessed regions having a shape (rhombus shape) are defined. The non-recessed area is an area where the recessed part 38 of the absorber 31 is not formed. Although not shown, the plurality of linear recesses 38 can be formed in a square lattice pattern. The “rectangular lattice pattern” referred to here means that, in plan view, a plurality of linear recesses 38 extending in parallel with the longitudinal direction intersect with a plurality of linear recesses 38 extending in parallel with the width direction. It refers to a pattern in which rectangular (rectangular) non-recessed areas are defined. Thus, by forming the plurality of concave portions 38 in a lattice pattern such as a rectangular lattice shape or a rectangular lattice shape, the touch and breathability of the absorbent main body 30 can be improved. However, the shape of the recess 38 is not limited to the lattice pattern described above. For example, the concave portion 38 may be one straight line extending along the longitudinal direction, or may be a plurality of straight lines extending in parallel along the longitudinal direction. In any pattern, it is preferable that the concave portion 38 includes a portion reaching the end edge in the longitudinal direction of the absorber 31. That is, it is preferable that the recess 38 is also formed on the end face of the absorbent body 31 in the longitudinal direction.

The disposable diaper of the present invention enhances the air permeability by introducing the air in the diaper into the space inside the tack formed in each connecting member 40A, 40B. However, in the wearing state of the disposable diaper, the tack is crushed in the thickness direction by clothes, and it is difficult to create a space between the tack and the wearer's skin, and there is a concern that moisture accumulates there. Therefore, as described above, by forming one or a plurality of recesses 38 at the end of the absorbent body 31 in the longitudinal direction, air is introduced into the space inside the tack through the recesses 38 even in a worn state. I am doing so. For this reason, this recessed part 38 functions as a ventilation groove. In this way, by forming the concave portion 38 at the longitudinal end portion of the absorbent body 31 on the side where the connecting portion 40 is provided, the concave portion 38 ensures a gap with the wearer's skin. Therefore, the air permeability in a state where the connecting portion 40 is folded can be improved. Moreover, even if the tack of the connecting part 40 is crushed by clothes in the wearing state of the disposable diaper, the tuck and the skin of the wearer are formed by forming the recess 38 at the end of the absorbent body 31. Since a gap is generated between them, moisture can be prevented from accumulating there. The penetration part has an effect of preventing moisture from accumulating similarly to the concave part 38, and contributes to improvement of air permeability.

[Modification]
Then, with reference to FIG. 7, the modification of the disposable diaper which concerns on this invention is demonstrated. FIG. 7 shows an enlarged cross-sectional structure of the back body 2 side, but the back body 2 side structure described here can also be applied to the front body 1 side.

In the example shown in FIG. 7, the absorbent main body 30 extends longer in the longitudinal direction than in the example shown in FIG. 6. That is, as shown in FIG. 7, the absorbent main body 30 is joined to the skin-facing surface of the rear connecting member 40B. It extends beyond the intermediate region 43. For this reason, the absorptive main body 30 is joined not only to the outer region 45 of the rear connection member 40B but also to the skin facing surface of the intermediate region 43. In other words, as for the back side connection member 40B, while the outer side area | region 45 has the junction part 45a with respect to the absorptive main body 30, the intermediate | middle area | region 43 also has the junction part 43c with respect to the absorptive main body 30. In addition, it is preferable that the edge of the longitudinal direction of the absorptive main body 30 is located in the intermediate | middle area | region 43 of the back side connection member 40B. That is, it is preferable that the absorptive main body 30 has a length that does not exceed the valley fold portion 42 of the rear connection member 40B.

In the example shown in FIG. 7, the absorbent body 31 of the absorbent main body 30 extends to the intermediate region 43 beyond the mountain-folded portion 41 of the rear connecting member 40B. For this reason, the absorber 31 has the folding | returning part 31a turned back toward the skin opposing surface side along the mountain fold part 41 of the back side connection member 40B. Therefore, the absorber 31 overlaps with two layers in the thickness direction at the site where the folded portion 31a is formed. Since the absorber 31 is a member having a predetermined thickness configured to include an absorbent material such as fluff pulp, when the absorbent 31 is folded back at the mountain fold 41, the internal space of the tack is reduced by the rigidity of the absorber 31. Will spread. In particular, since the absorber 31 is folded back at the mountain fold 41, the internal space of the tack is not easily crushed even when the tack is pressed from the outside. For this reason, in the modification shown in FIG. 7, since the internal space of the tack is maintained relatively wide, the air permeability in the vicinity of the tack can be enhanced.

Moreover, in the example shown in FIG. 7, the absorbent body 31 of the absorbent main body 30 has a thin region 39 at the end in the longitudinal direction. The thin region 39 is a portion where the thickness of the absorbent body 31 is thinner than the thickness of the absorbent body 31 at least in the central part of the disposable diaper in the longitudinal direction. The thin region 39 can be formed, for example, by squeezing the absorbent material constituting the absorber 31. The thin-walled region 39 is preferably a band-shaped region that is located at the end in the longitudinal direction of the absorber 31 and extends across the entire width of the absorber 31. The thickness of the absorber 31 in the thin-walled region 39 may be 10 to 80%, 20 to 75%, or 30 to 70%, where the thickness of the absorber 31 in the central portion in the longitudinal direction is 100%. Note that the above-described recess 38 can also be formed in the thin region 39.

The thin-walled region 39 can be provided in both or either one of the absorber 31 on the front body exterior body 10 side and the back body exterior body 20 side. In particular, the thin region 39 is preferably provided at the end on the side where the connecting members 40A and 40B are provided. Thus, by providing the thin region 39 at the end on the side where the connecting members 40 and 40B are provided and partially reducing the thickness of the absorber 31, the air permeability at this end can be improved. .

Further, as shown in FIG. 7, the thin region 39 is preferably formed in a portion of the end portion of the absorber 31 that is folded along the mountain-folded portion 41 of the rear connection member 40B. Specifically, it is preferable that a thin region 39 is formed in the folded portion 31a of the absorbent body 31. Further, in a state where the absorbent body 31 is folded along the mountain folded portion 41, the folded portion 31a faces the folded portion 31a. It is preferable that a thin region 39 is formed in a portion to be overlapped (overlapping portion). Thus, by making the portion of the absorber 31 located in the vicinity of the mountain fold 41 as the thin region 39, the absorber 31 can be easily folded along the mountain fold 41. Moreover, by making the folding | returning part 31a and the facing part of the absorber 31 into the thin area | region 39, when the edge part of the absorber 31 is folded along the mountain fold part 41, it can avoid that the thickness becomes large too much. . For this reason, even if it is a case where the absorber 31 is return | folded, it can avoid impairing a wear feeling.

In the example of FIG. 7 described above, the case where the absorber 31 has the thin region 39 is shown. However, the absorber 31 is replaced with the thin region 39 in the center in the longitudinal direction of the disposable diaper. You may have the low basic weight area | region where the basic weight of the said absorber (31) is smaller than the basic weight of an absorber (31). The presence of the low basis weight region improves the ease of folding of the absorbent body 31 and the feeling of wearing as in the case where the absorbent body 31 has the thin-walled region 39. A low basic weight area | region can be formed by making the density of the absorber in the edge part of an absorber low, for example. The low basis weight region may have a basis weight of 50 to 80%, 20 to 75%, or 30 to 70% when the basis weight of the absorbent body 31 in the central portion in the longitudinal direction is 100%. Good. The thickness of the absorber 31 in the low basis weight region 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 preferably a belt-like region located at the end of the absorbent body 31 in the longitudinal direction and extending over the entire width direction of the absorbent body 31. Other preferred embodiments of the thin region 39 can also be applied to the low basis weight region. The absorber 31 may have both the thin area | region 39 and the low basic weight area | region.

7 can adopt the same configuration as that of the embodiment described with reference to FIGS. 1 to 6 as the other configuration.

As mentioned above, in this specification, in order to express the content of the present invention, the embodiment of the present invention was described with reference to the drawings. However, the present invention is not limited to the above-described embodiment, but includes modifications and improvements obvious to those skilled in the art based on the matters described in the present specification.

The present invention can be applied to disposable diapers such as pants and tapes. Therefore, this invention can be utilized suitably in the manufacturing industry of a disposable diaper.

DESCRIPTION OF SYMBOLS 1 ... Front body 2 ... Back body 3 ... Crotch part 4 ... Side seal part 5 ... Waist opening 6 ... Leg opening part 10 ... Front body exterior body 11 ... Inner sheet 12 ... Outer sheet 13 ... Waist elastic member 20 ... Back body Exterior body 21 ... Inner sheet 22 ... Outer sheet 23 ... Waist elastic member 30 ... Absorptive main body 31 ... Absorber 31a ... Folding part 32 ... Top sheet 33 ... Back sheet 34 ... Cover sheet 35 ... Side sheet 36 ... Solid gather expansion / contraction member 37 ... Leg elastic member 38 ... Concave portion 39 ... Thin region 40 ... Connecting portion 40A ... Front side connecting member 40B ... Rear side connecting member 41 ... Mountain fold portion 42 ... Valley fold portion 43 ... Intermediate region 43a ... Joining region 43b ... Non-joining region 43c ... Junction part 44 ... Inside area 44 a ... joining part 45 ... outer side region 45a ... joining part 46 ... connecting part stretchable member 47 ... tammy stretchable member 51 ... leakproof sheet 52 ... outer surface sheet 100 ... disposable diaper

Claims (5)

1. A front body exterior body (10) positioned on the wearer's abdomen side, a back body exterior body (20) positioned on the wearer's back side, and an absorbent main body (30) positioned on the wearer's inseam ,
   The absorbent main body (30) includes an absorbent body (31), a liquid-permeable top sheet (32) that covers the skin-facing surface of the absorbent body (31), and the non-facing skin of the absorbent body (31). A disposable diaper having a liquid-impermeable backsheet (33) covering the surface,
   The absorbent main body (30) has a mountain fold (41) extending in the width direction of the disposable diaper with respect to both or any one of the front body exterior body (10) and the rear body exterior body (20). ) And a connecting part (40) having a valley fold part (42),
   The absorber (31) is at least at the end of either or either of the front body exterior body (10) side and the back body exterior body (20) side where the connecting portion (40) is located. A disposable diaper having a recess (38) recessed in the thickness direction of the absorbent body (31) or a through portion penetrating in the thickness direction of the absorbent body (31).
2. The connecting portion (40) has an intermediate region (43) located between the mountain fold (41) and the valley fold (42),
   The intermediate region (43) is formed in the state where the connecting portion (40) is folded at the mountain fold portion (41) and the valley fold portion (42). The disposable diaper of Claim 1. It overlaps with the area | region in which the penetration part was formed, and the thickness direction.
3. The intermediate region (43) faces the skin facing surface side of the intermediate region (43) in a state where the connecting portion (40) is folded at the mountain fold (41) and the valley fold (42). It has a joint region (43a) that is joined in a peelable or non-peelable manner to both or one of the parts facing the part and the skin non-facing surface side,
   The disposable diaper according to claim 2, wherein the joining region (43a) is located in a region where the intermediate region (43) and the absorbent main body (31) do not overlap in the thickness direction.
4. The disposable diaper according to claim 2 or 3, wherein the absorbent body (31) of the absorbent main body (30) is folded along the mountain fold (41) of the connecting portion (40).
5. The said absorber (31) is the said absorption in the center part of the longitudinal direction of the said disposable diaper in the one end part or both of the said front body exterior body (10) side and the said back body exterior body (20) side. Thin absorber region (39) where the thickness of the absorber (31) is thinner than the thickness of the body (31), or the basis weight of the absorber (31) in the longitudinal center of the disposable diaper The disposable diaper according to any one of claims 1 to 4, wherein the basis weight of (31) is a low basis weight region.

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