JP2015119759A - Disposable diaper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve fit between itself and the legs of a wearer and significantly exert leakage prevention properties at leg opening parts in a tape type diaper.SOLUTION: In a disposable diaper 1, an end part E2 of a crotch gather 22 at a back side B in a product longitudinal direction L is disposed at the back side B in the product longitudinal direction L with respect to an extension line L2 that is formed by connecting an outer edge 4E1 of a back-side side flap part 4 in a product width direction W, an end part EL1 of a line L1 crossing with a fastening tape 5 at a ventral side F in the product longitudinal direction L, and an end part E1 of a leg gather 21 at the back side B in the product longitudinal direction L. The end part E1 of the leg gather 21 at the back side B in the product longitudinal direction L is disposed at the back side B in the product longitudinal direction L with respect to an end part 4E2 of the back-side side flap part 4 at the ventral side F in the product longitudinal direction L.

Description

  The present invention relates to a disposable diaper.

  Conventionally, a tape-type diaper having a side flap portion, a fastening tape (fastening member), a leg gather (first stretchable member), a leg standing gather (leak barrier), and a crotch gather (second stretchable member) is known. (See Patent Document 1).

  Here, in the tape-type diaper described in Patent Document 1, a leak-proof leg standing gather (leak-proof wall) is formed in the main body (diaper main body), and an area in the vicinity of the fixed end of the leg standing gather. The crotch gathers (third stretchable member) that are stretched along the longitudinal direction of the product are arranged so that the absorbent body can be lifted in a direction to fit the wearer's skin.

JP 2013-052307 A

  However, in the tape-type diaper described in the above-mentioned Patent Document 1, when a large amount of urine is absorbed, the force to pull up the side flap portion cannot be transmitted to the leg gather, the leg standing gather, or the inseam gather. The absorbent body hangs down due to the weight of the urine, creating a gap between the wearer's skin and the leg gather and leg standing gather, and the fit between the wearer's legs and the tape-type diaper is reduced. There has been a problem that there is a possibility that the leakage preventing property at the leg opening portion may not be sufficiently exhibited.

  Accordingly, the present invention has been made in view of the above-described problems, and can improve the fit between the wearer's leg and sufficiently exhibit the leak-proof property at the opening around the leg. The object is to provide a disposable disposable diaper.

  The first feature of the present invention has a product longitudinal direction and a product width direction orthogonal to each other, and has a back side and an abdomen side, a main body portion including an absorber, and a main body portion on the back side A side flap portion extending in the product width direction, a fastening tape extending from the side flap portion in the product width direction, and a pair of expansion and contraction leak-proof extending along the product longitudinal direction in the main body portion Sex leg standing gathers, a pair of stretchable leg gathers extending along the product longitudinal direction outside the leg standing gathers of the main body portion in the product width direction, and at the free ends of the leg standing gathers A pair of elastic members that extend along the longitudinal direction of the product and a fixed end of the leg standing gather A pair of stretchable crotch gathers extending along the product longitudinal direction in an inner region in the product width direction and in an outer region in the product width direction than an end in the product width direction of the absorber. The product-longitudinal direction of the product in the product longitudinal direction of the crotch gathers is the product longitudinal direction of the line where the outer edge of the product width direction of the side flap portion and the fastening tape intersect It is arranged on the back side in the product longitudinal direction rather than an extension line connecting the abdomen end portion of the leg gather and the back end portion in the product longitudinal direction of the leg gather, and the leg gather The gist of the invention is that the back end portion in the product longitudinal direction is arranged on the back side in the product longitudinal direction with respect to the abdomen end portion in the product longitudinal direction of the side flap portion.

  As described above, according to the present invention, it is possible to provide a tape-type disposable diaper that can improve the fit between a wearer's leg and sufficiently exhibit the leak-proof property at the opening around the leg. can do.

It is the top view seen from the skin contact surface side of the disposable diaper which concerns on the 1st Embodiment of this invention. It is an enlarged view of the area | region A in FIG. It is XX sectional drawing in Drawing 1 at the time of wearing of a disposable diaper concerning a 1st embodiment of the present invention. It is XX sectional drawing in Drawing 1 at the time of wearing of a disposable diaper concerning a 1st embodiment of the present invention. It is a figure for demonstrating the effect implement | achieved by the disposable diaper which concerns on the 1st Embodiment of this invention. It is the top view seen from the skin contact surface side of the disposable diaper which concerns on the modification 1 of this invention. It is an enlarged view of the area | region A in the top view seen from the skin contact surface side of the disposable diaper which concerns on the modification 2 of this invention.

  With reference to FIG. 1 thru | or FIG. 5, the disposable diaper 1 which concerns on the 1st Embodiment of this invention is demonstrated.

  In the following description of the drawings, the same or similar parts are denoted by the same or similar reference numerals. However, it should be noted that the drawings are schematic and ratios of dimensions and the like are different from actual ones.

  Therefore, specific dimensions and the like should be determined in consideration of the following description. Moreover, the part from which the relationship and ratio of a mutual dimension differ also in between drawings may be contained.

  FIG. 1 is a plan view (a state in which the disposable diaper 1 according to this embodiment is viewed from the skin contact surface side (a state where the diaper has been stretched to the extent that wrinkles disappear)), and FIG. 2 is an enlarged view of a region A in FIG. 3 and 4 are sectional views taken along the line XX in FIG. 1 when the disposable diaper 1 according to this embodiment is mounted, and FIG. 5 explains the effects realized by the disposable diaper 1 according to this embodiment. It is a figure for doing.

  As shown in FIG. 1, the disposable diaper 1 which concerns on this embodiment has the product longitudinal direction L and the product width direction W which are mutually orthogonally crossed. In addition, as shown in FIG. 1, the product longitudinal direction L has a ventral side F and a back side B.

  Moreover, the disposable diaper 1 which concerns on this embodiment is a tape type | mold which comprises the main-body part 2 containing the absorber 13, and the back side side flap part 4 extended in the product width direction W in the main-body part 2 in the back side B. A diaper.

  As shown in FIG. 1, the disposable diaper 1 according to the present embodiment further includes a ventral side flap portion 3 extending in the product width direction W in the main body portion 2 on the ventral side F, so-called 3P. A tape-type diaper having a (Piece) structure may be used.

  The ventral side flap portion 3 and the back side flap portion 4 are composed of a hydrophobic nonwoven fabric, a moisture permeable or moisture permeable film, or a composite sheet obtained by bonding a hydrophobic nonwoven fabric and a moisture permeable or moisture permeable film. Become. A film mainly composed of polyethylene, polypropylene, the like, a breathable resin film, a spunbond, or a sheet in which a breathable resin film is bonded to a nonwoven fabric such as spunlace can be used.

  Moreover, as shown in FIG. 1, the disposable diaper 1 which concerns on this embodiment is equipped with the fastening tape 5 extended in the product width direction W from the back side flap part 4. As shown in FIG. Here, a target tape (not shown) that can be locked to the fastening tape 5 may be provided on the non-skin contact surface side of the ventral side flap portion 3.

  For example, the fastening tape 5 is a male member of a so-called surface fastener, and the target tape is a female member.

The fastening tape 5 is formed with an engaging surface having a plurality of hook-shaped projection groups (called hooks). Examples of the material of the fastening tape 5 include PPSB (polypropylene spunbonded nonwoven fabric). For example, it is preferable to use PPSB with a basis weight of 80 g / m ² . The basis weight of such a hook is preferably 100 g / m ² .

  As shown in FIG. 1, the disposable diaper 1 according to the present embodiment includes a pair of leak-proof leg standing gathers (three-dimensional gathers or cuffs) 6 that extend along the product longitudinal direction L in the main body 2. It has. Here, as shown in FIG. 1, the leg standing gather 6 is joined to the extensible free end 6 </ b> A extending in the product longitudinal direction L and outside the product width direction W from the region where the absorber 13 exists. And a fixed end 6B extending in the product longitudinal direction L.

  Furthermore, as shown in FIG. 1, the disposable diaper 1 according to the present embodiment includes a pair of stretchable leg gathers 21 that extend along the product longitudinal direction L outside the leg standing gathers 6 in the product width direction W, Along the product longitudinal direction L in a region inside the product width direction W from the fixed end 6B of the leg standing gather 6 and a region outside the product width direction W of the end portion 13E of the absorbent body 13 in the product width direction W. A pair of stretchable crotch gathers 22 that extend and a pair of stretchable elastic members 23 that extend along the product longitudinal direction L at the free end 6A of the leg standing gathers 6 are provided.

  As shown in FIG. 2, the end portion E <b> 2 on the back side B in the product longitudinal direction L of the crotch gather 22 is the product on the line L <b> 1 where the outer edge portion 4 </ b> E <b> 1 in the product width direction W of the back side flap portion 4 and the fastening tape 5 intersect. It is arranged on the back side B in the product longitudinal direction L than the extension line L2 connecting the end EL1 on the ventral side F in the longitudinal direction L and the end E1 on the back side B in the product longitudinal direction L of the leg gather 21. .

  Further, as shown in FIG. 2, the end E1 on the back side B in the product longitudinal direction L of the leg gather 21 is more productive than the end 4E2 on the ventral side F in the product longitudinal direction L of the back side flap portion 4. It is arranged on the back side B in the longitudinal direction L.

  In addition, the area | region where the elastic member is not arrange | positioned is provided in the back side flap part 4 so that a wrinkle may not come to the back side flap part 4 at the time of mounting | wearing of the disposable diaper 1. FIG.

  For example, when the length in the product longitudinal direction L of the back side flap portion 4 is 80 mm or more, the end portion E2 of the back side B in the product longitudinal direction L of the crotch gather 22 and the product length of the back side flap portion 4 The distance between the end 4E3 on the back side B in the direction L is preferably 50 mm or more.

  Further, the distance between the end E2 on the back side B in the product longitudinal direction L of the crotch gather 22 and the end 4E2 on the ventral side F in the product longitudinal direction L of the back side flap portion 4 and the leg gather 21 The distance between the end E1 on the back side B in the product longitudinal direction L and the end 4E2 on the ventral side F in the product longitudinal direction L of the back side flap portion 4 is preferably 5 mm or more.

  As shown in FIG. 3, the disposable diaper 1 according to this embodiment includes a top sheet (liquid permeable sheet) 11, a back sheet (liquid impermeable sheet) 12, a top sheet 11 and a back sheet 12. And an absorber 13 disposed between the two.

  The top sheet 11 is not particularly limited as long as it is a sheet-like material having a structure that allows liquid to permeate, such as a nonwoven fabric, a woven fabric, a perforated plastic sheet, and a mesh sheet. Either natural fibers or chemical fibers can be used as the woven or non-woven material.

Examples of natural fibers include cellulose such as pulverized pulp and cotton. Examples of the chemical fiber include regenerated cellulose such as rayon and fibril rayon, semi-synthetic cellulose such as acetate and triacetate, thermoplastic hydrophobic chemical fiber, or thermoplastic hydrophobic chemical fiber subjected to hydrophilic treatment. Examples of thermoplastic hydrophobic chemical fibers include single fibers such as polyethylene (PE), polypropylene (PP), and polyethylene terephthalate (PET), fibers formed by graft polymerization of polyethylene and polypropylene, and composite fibers such as a core-sheath structure. Can be mentioned. For example, the top sheet 11 is a point bond nonwoven fabric having a basis weight of 18 g / m ² .

  As a method for producing the nonwoven fabric, any one of a dry method (a card method, a spun bond method, a melt blown method, an airlaid method, etc.) and a wet method can be used. A plurality of methods may be combined among the dry method and the wet method. Moreover, methods, such as thermal bonding, needle punching, and chemical bonding, are mentioned. The method for producing the nonwoven fabric is not limited to the above-described method.

The back sheet 12 is made of a liquid-impermeable and moisture-permeable or moisture-impermeable film. For example, the back sheet 12 is a non-breathable film having a basis weight of 16 g / m ² .

  The absorber 10 has a core wrap and an absorbent core that absorbs liquid. The absorbent core includes a hydrophilic fiber and a superabsorbent polymer. Examples of hydrophilic fibers include pulverized pulp, cellulose such as cotton, regenerated cellulose such as rayon and fibril rayon, semi-synthetic cellulose such as acetate and triacetate, particulate polymer, fibrous polymer, thermoplastic hydrophobic chemical fiber, or A thermoplastic hydrophobic chemical fiber or the like subjected to hydrophilic treatment can be used alone or in combination. Among these, it is preferable to use pulverized pulp in consideration of low cost and ease of forming the absorber. You may use what mixed the polymer absorber with the hydrophilic fiber.

The absorbent core is wrapped with a core wrap. For example, as the core wrap, various fiber nonwoven fabrics or tissue sheets having permeability at least at a part on the skin contact surface side, specifically, air-through fiber nonwoven fabric or spunbond having a basis weight of 10 to 30 g / m ² Nonwoven fabrics, SMS nonwoven fabrics, and tissue sheets can be used.

  As shown in FIG. 3, the disposable diaper 1 according to this embodiment includes a side sheet 14 that is joined to the skin contact surface side of the top sheet 11 and extends in the product width direction W of the top sheet 11. Yes.

  The above-mentioned leg standing gather 6 is constituted by such a side seat 14. For example, as the side sheet 14, an SMS nonwoven fabric of 15 gsm and a width of 168 mm can be used.

  As shown in FIG. 3, in the disposable diaper 1 according to this embodiment, a back film 15 may be provided between the absorber 13 and the back sheet 12.

  Here, the stretch rate of the leg gathers 21 may be configured to be larger than the stretch rate of the crotch gathers 22.

  For example, the expansion rate of the crotch gather 22 is 2.1 times, and the effective length of the crotch gather 22 in the product longitudinal direction L is 205 mm. Each of the pair of crotch gathers 22 may be composed of a single rubber of 780 dtex.

  Moreover, the expansion rate of the leg gather 21 is 2.3 times, and the effective length of the leg gather 21 in the product longitudinal direction L is 230 mm. Each of the pair of leg gathers 21 may be constituted by two rubbers of 620 dtex.

  When the disposable diaper 1 having the above-described configuration is expanded 93% of the length in the product longitudinal direction L, the stress of the crotch gather 22 is 0.29 N, and the stress of the leg gather 21 is 0.66 N. is there.

  Moreover, the expansion ratio of the elastic member 23 is 2.5 times, and each of the pair of elastic members 23 may be composed of one rubber of 620 dtex.

  Here, the stretch rate of the above-described elastic members (the elastic members constituting the leg gathers 21, the elastic members constituting the crotch gathers 22, and the elastic members 23) is measured as follows.

  First, the length of each elastic member in the natural state of the disposable diaper 1 is measured.

  2ndly, each elastic member is cut out from the disposable diaper 1, and the length of each cut-out elastic member is measured.

  3rdly, the expansion | extension rate of each elastic member is computed by ratio of the length of each elastic member in the natural state of the disposable diaper 1, and the length of each cut elastic member.

  If the stress of the inseam gather 22 is greater than the stress of the leg gather 21, the leg gather 21 is pulled downward when the disposable diaper 1 is worn, and the fit of the leg gather 21 to the wearer's leg is reduced. There was a problem. Therefore, by making the extension rate of the leg gather 21 larger than the extension rate of the crotch gather 22, the stress of the leg gather 21 is made larger than the stress of the crotch gather 22, and this problem can be solved.

  Moreover, as shown in FIG. 4, the absorber 13 may be subjected to lattice-like embossing.

  According to this configuration, the absorbent body 13 is bent by the pressing groove 13A generated by the above-described embossing.

  As a result, as shown in FIGS. 3 and 4, the angle α2 formed by the skin contact surfaces of the leg standing gather 6 and the top sheet 11 when such embossing is performed is not subjected to such embossing. The leg standing gather 6 and the skin contact surface of the top sheet 11 are larger than the angle α1.

  Further, according to such a configuration, the absorber 13 is subjected to lattice-shaped embossing to increase the rigidity of the absorber 13, so that the absorber 13 is deformed by the crotch gather 22 (formation of wrinkles and strains). ) Is suppressed.

  As a result, since the entire absorbent body 13 can be utilized by inducing liquid diffusion in the product longitudinal direction L, the absorbent body 13 can be prevented from sagging.

  Further, as shown in FIGS. 3 and 4, the distance h2 between the tip of the leg standing gather 6 and the absorber 13 when such embossing is performed is the case where such embossing is not performed. The distance h1 is longer than the distance h1 between the tip of the leg standing gather 6 and the absorber 13.

  According to such a configuration, by increasing the distance h2, the leakage of urine and feces to the outside can be prevented, and the leakproofness of the disposable diaper 1 can be further enhanced.

  As described above, according to the disposable diaper 1 according to the present embodiment, as shown in FIG. 5, the tension F is generated between the fastening tape 5, the leg gather 21, and the crotch gather 22, and the back side flaps are generated. The lifting effect of the leg gather 21 and the crotch gather 22 by the part 4 can be effectively transmitted to the crotch region of the disposable diaper 1.

  As a result, there is no gap between the leg gather 21 and the leg standing gather 6 and the skin surface of the wearer, the fit between the disposable diaper 1 and the wearer's leg is improved, and the leg of the disposable diaper 1 It is possible to realize sufficient leakage prevention at the opening.

(Modification 1)
Hereinafter, with reference to FIG. 6, the disposable diaper 1 which concerns on the modification 1 of this invention is demonstrated paying attention to difference with the disposable diaper 1 which concerns on the above-mentioned 1st Embodiment.

  As shown in FIG. 6, in the disposable diaper 1 according to the first modification example, the back side flap portion 4 extending to the left and right in the product width direction W in the main body portion 2 on the back side B is formed by the same sheet-like member. It is configured.

  Further, as shown in FIG. 6, the intersection point D1 between the end portion E3 on the back side B in the product longitudinal direction L of the elastic member 23 and the end portion 4E20 on the ventral side F in the product longitudinal direction L of the back side flap portion 4 is It arrange | positions in the back side B rather than the edge part 4E2 located in the most stomach side F of the product longitudinal direction L of the back side flap 4. FIG.

  That is, as shown in FIG. 6, in the disposable diaper 1 according to the first modification, in a part of the region where the back side flap 4 and the elastic member 23 overlap (region B in FIG. 6), the back side flap portion. 4 is configured to be removed.

  According to such a configuration, the effective range of the elastic member 23 can be expanded. Here, the effective range of the elastic member 23 is a range showing the effect as the elastic member 23, that is, a range in which the elastic member 23 can expand and contract and the leg standing gather 6 can stand up.

  As a result, the range in which the leg standing gathers 6 rise is widened, and the leakproof property of the disposable diaper 1 can be improved.

(Modification 2)
Hereinafter, with reference to FIG. 7, the disposable diaper 1 which concerns on the modification 2 of this invention is demonstrated paying attention to difference with the disposable diaper 1 which concerns on the above-mentioned 1st Embodiment.

  As shown in FIG. 7, in the disposable diaper 1 according to the second modification, the back side flap portion 4 is formed with an overlapping region T where the sheet members overlap. That is, in the disposable diaper 1 according to the second modification example, there are two sheet members in the overlapping region T of the back side flap portion 4.

  Here, the leg gather 21 is disposed at a position overlapping the overlapping region T. Note that the inseam gather 22 may also be disposed at a position overlapping the overlapping region T.

  According to such a feature, by stacking the sheet member at a location where a force is applied when the fastening tape 5 is pulled outside in the product width direction W, it is possible to obtain an effect that the strength of the location becomes strong and is not easily torn. .

  In addition, the overlapping region T is configured by folding back one sheet member so that two sheets overlap each other, and the disposable diaper according to claim 5 or 6.

  In addition, in the disposable diaper 1 which concerns on this modification 2, in the area | regions other than the duplication area | region T of the back side flap part 4, the sheet | seat member has not overlapped. That is, in the disposable diaper 1 according to the second modification, only one sheet member exists in the region other than the overlapping region T of the back side flap portion 4.

  According to this structure, while being able to simplify the manufacturing method of the disposable diaper 1, the material used for the disposable diaper 1 can be reduced and it can contribute to a cost reduction.

  Further, according to such a configuration, since only one sheet member is present in a region other than the overlapping region T of the back side flap portion 4, that is, a region that contacts the wearer's back, ventilation is performed. From the viewpoint of sex and feel, it is possible to give a comfortable wearing feeling for the wearer.

  Although the present invention has been described in detail using the above-described embodiments, it is obvious to those skilled in the art that the present invention is not limited to the embodiments described in this specification. The present invention can be implemented as modified and changed modes without departing from the spirit and scope of the present invention defined by the description of the scope of claims. Therefore, the description of the present specification is for illustrative purposes and does not have any limiting meaning to the present invention.

DESCRIPTION OF SYMBOLS 1 ... Disposable diaper 2 ... Main-body part 3 ... Abdominal side flap part 4 ... Dorsal side flap part 5 ... Fastening tape 6 ... Leg standing gather 6A ... Free end 6B ... Fixed end 11 ... Top sheet 12 ... Back sheet 13 ... Absorption Body 13A ... Pressing groove 14 ... Back film 15 ... Side sheet 21 ... Leg gather 22 ... Inseam gather 23 ... Elastic member

Claims (7)

It has a product longitudinal direction and a product width direction perpendicular to each other,
Have dorsal and ventral sides,
A main body including an absorbent body;
A back side flap portion extending in the product width direction in the body portion on the back side;
Fastening tape extending in the product width direction from the back side flap portion,
A pair of leak-proof leg standing gathers that can extend and contract along the longitudinal direction of the product in the main body,
A pair of stretchable leg gathers extending along the product longitudinal direction on the outer side in the product width direction than the leg standing gathers of the main body,
A pair of stretchable elastic members extending along the product longitudinal direction at the free ends of the leg standing gathers;
Expansion and contraction extending along the product longitudinal direction in a region inside the product width direction with respect to the fixed end of the leg standing gather and in a region outside the product width direction with respect to the end portion in the product width direction of the absorber. A disposable diaper comprising a pair of possible inseam gathers,
The back end of the crotch gather in the product longitudinal direction is the end on the ventral side in the product longitudinal direction of the line where the outer side edge of the product width direction of the back side flap portion and the fastening tape intersect. And an extension line connecting the end of the product in the longitudinal direction of the product of the leg gather with the back side in the product longitudinal direction,
The end of the leg gather in the product longitudinal direction of the leg gather is disposed on the back side in the product longitudinal direction of the back side flap portion than the abdomen end of the product longitudinal direction. A disposable diaper characterized by   The disposable diaper according to claim 1, wherein an extension rate of the leg gathers is configured to be larger than an extension rate of the crotch gathers.   The disposable diaper according to claim 1 or 2, wherein the absorbent body is subjected to lattice-like embossing. The back side flap portion extending to the left and right in the product width direction in the main body portion on the back side is constituted by the same sheet-like member,
The intersection of the back end portion of the elastic member in the product longitudinal direction and the back side end portion of the back side flap portion in the product longitudinal direction of the back side flap portion is the most abdomen in the product longitudinal direction of the sheet-like member. The disposable diaper according to any one of claims 1 to 3, wherein the disposable diaper is disposed on the back side with respect to an end portion located on the side. In the back side flap portion extending to the left and right in the product width direction in the main body portion on the back side, an overlapping region where the sheet member is overlapped is formed,
The disposable diaper according to any one of claims 1 to 3, wherein the leg gather is disposed at a position overlapping the overlapping region.   The disposable diaper according to claim 5, wherein the crotch gather is disposed at a position overlapping the overlapping region.   The disposable diaper according to claim 5 or 6, wherein the overlapping region is configured by folding back one sheet member so as to overlap two sheets.

Images