JP6199588B2 - Disposable diapers - Google Patents

Description

  The present invention relates to a disposable diaper.

  Patent Document 1 is provided with a pair of side flaps that can be extended and contracted so as to extend from the side edges in the product width direction of the absorbent body, and the side edges in the product width direction of each of the pair of side flaps. A disposable diaper in which a fastening tape (fastening tape) is provided so as to extend from is described.

  In such a disposable diaper, the tensile stress A in the tensile direction of the fastening tape at the side edge on the crotch region side of the side flap is the tensile stress B in the tensile direction of the fastening tape at the side edge on the rear waist region side of the side flap. It is comprised so that it may become larger.

JP 2011-160933 A

  However, the applicant has found the following problems with the disposable diaper described above.

  Patent Document 1 merely describes that the above-described disposable diaper is configured such that the extension stress B on the rear waistline region side is smaller than the extension stress A on the crotch region side. .

  Therefore, in the case of the above-mentioned disposable diaper where the extension stress B on the rear waistline region side is small and the fit property in the waistline direction is low, the end part on the rear waistline side turns over, so However, there is a problem that leakage of relatively loose stool such as the above cannot be suppressed and leakage cannot be prevented when a large amount of urine is excreted.

  Moreover, in the above-mentioned disposable diaper, since the interlocking property between the side flap and the absorbent body is low, there is a problem in that when a large amount of urine is excreted during wearing, the diaper is displaced downward.

  Therefore, the present invention has been made in view of the above-described problems, and is a disposable that can improve the interlocking between the side flap and the absorbent body, improve the fit in the waistline direction, and prevent displacement. The purpose is to provide diapers.

  The first feature of the present invention has a product longitudinal direction and a product width direction orthogonal to the product longitudinal direction, and is arranged between a top sheet, a back sheet, and the top sheet and the back sheet. The absorbent body includes a front waistline region, a back waistline region, a crotch region positioned between the front waistline region and the back waistline region. A pair of side flaps that can extend and contract so as to extend from the side edges of the absorbent body in the product width direction in the rear waistline region, A fastening tape is provided so as to extend from a side edge portion of each of the side flaps in the product width direction, and the length in the product longitudinal direction at the side edge portion of the side flap in the product width direction is Sidef It is configured to be shorter than the length in the product longitudinal direction at the base portion of the cup, and the end of the region around the rear waist of the region where the absorber is disposed is each of the fastening tape The gist is that it is arranged on the rear waistline region side rather than the straight line connecting the end portions on the rear waistline region side.

  As described above, according to the present invention, it is possible to provide a disposable diaper that can improve the interlocking between the side flap and the absorbent body, improve the fit in the waistline direction, and prevent displacement. it can.

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 AA sectional drawing in 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 a figure which shows the mode at the time of mounting | wearing of the disposable diaper which concerns on the 1st Embodiment of this invention. It is a figure which shows the mode at the time of mounting | wearing of the disposable diaper which concerns on the 1st Embodiment of this invention. It is an enlarged view of the area | region X in 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 the enlarged view of the area | region Y in the top view seen from the skin contact surface side of the disposable diaper which concerns on the 1st Embodiment of this invention.

  With reference to FIG. 1 thru | or FIG. 6, the absorbent article 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 of the disposable diaper 1 according to the present embodiment as viewed from the skin contact surface side. FIG. 2 is a cross-sectional view taken along the line AA in FIG. The mode at the time of mounting | wearing of the disposable diaper 1 which concerns on this embodiment is shown.

  As shown in FIG. 1, the disposable diaper 1 which concerns on this embodiment has a product longitudinal direction and the product width direction orthogonal to the said product longitudinal direction.

  As shown in FIG. 2, the disposable diaper 1 according to the present embodiment includes a top sheet 11, a back sheet 12, and an absorbent body 10 disposed between the top sheet 11 and the back sheet 12. It has the absorber main body 2 which does.

  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 23 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 absorbent body 10 is disposed between the top sheet 11 and the back sheet 12 and is disposed so as to extend over the crotch region 25 and into the front waistline region 20 and the rear waistline region 30.

  The absorbent body 10 has an absorbent core 10A that absorbs liquid and a core wrap 10B. The absorbent core 10A includes hydrophilic fibers 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.

  Absorbent core 10A is wrapped with core wrap 10B. For example, the core wrap 10B is a tissue.

  Here, as shown in FIG. 1, the absorbent body 2 has a front waistline region 20, a back waistline region 30, and a crotch region 25 located between the front waistline region 20 and the back waistline region 30. Yes.

  Here, the front waistline region 20 is a region assumed to contact the wearer's abdomen, and the crotch region 25 is a region assumed to contact the wearer's inseam, and the back waistline region 30. Is an area assumed to abut on the wearer's back.

  For example, in a tape-type diaper such as the disposable diaper 1 according to the present embodiment, as shown in FIG. 1, the front waistline region 20 has an end portion on the front waistline region 20 side of the absorbent body 2 in the product longitudinal direction L. It is a region between the end portion of the side flap 3 at the base portion B1 on the rear waistline region 30 side, and the rear waistline region 30 may be a region corresponding to the front waistline region 20 when worn.

  On the other hand, in the pants-type diaper, the front waistline region 20 and the back waistline region 30 may be regions where side edges in the product width direction W are joined.

  In the disposable diaper 1 according to the present embodiment, the leg gathers 5 are arranged in the absorbent body 2 so as to extend into the front waistline region 20 and the back waistline region 30 across the crotch region 25.

  Moreover, in the disposable diaper 1 which concerns on this embodiment, in the back waist area 30, the pair of side flap 3 which can be expanded-contracted so that it may extend from the side edge part S1 of the product width direction W of the absorber main body 2 is provided. Yes.

  The side flap 3 is made of a hydrophobic nonwoven fabric, a moisture-permeable or moisture-impermeable film, or a composite sheet obtained by bonding a hydrophobic nonwoven fabric and a moisture-permeable or moisture-impermeable film. 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.

  Furthermore, in the disposable diaper 1 which concerns on this embodiment, the fastening tape 4 is provided so that it may extend from the side edge part S2 of each product width direction W of this pair of side flaps 3. As shown in FIG. Here, a target tape that can be locked to the fastening tape 4 may be provided on the non-skin contact surface side of the front waistline region 20 of the absorbent body 2 (not shown).

  For example, the fastening tape 4 is a male member of a so-called surface fastener, and the target tape is a female member.

The fastening tape 4 is formed with an engagement surface having a plurality of hook-shaped projections (called hooks). Examples of the material of the fastening tape 4 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 .

The target tape to which the fastening tape 4 is locked is a non-woven fabric or a knitted fabric that can be engaged with a hook. A composite fiber having a core-sheath structure is used as the fibrous material constituting the nonwoven fabric. As the fibrous material, the core component / sheath component is, for example, a combination of PP (polypropylene) / PE (polyethylene), PP / low melting point PP, PET (polyethylene terephthalate) / low melting point PET, and PET / PE. You may mix fibers, such as polyamide, such as rayon, PET, PP, and nylon, acrylic, urethane, and cotton, with a fibrous material. For example, the basis weight of the female member is 38 g / m ² .

  Here, the length L1 in the product longitudinal direction at the side edge S2 in the product width direction W of the side flap 3 is configured to be shorter than the length L2 in the product longitudinal direction at the base portion B1 of the side flap 3. Yes.

  The extending direction of the end portion E3 on the crotch region 25 side of the side flap 3 needs to be different from the product width direction W and the product longitudinal direction L as shown in FIG. The extending direction of the end portion E4 on the 30 side may coincide with the product width direction W.

  The end portion E1 on the rear waistline region 30 side of the region where the absorber 10 is disposed is closer to the rear waistline region 30 side than the straight line D1 connecting the end portions E2 on the rear waistline region 30 side of each fastening tape 4. Has been placed.

  Generally, the disposable diaper 1 in which the extendable side flap 3 is used is easy to wear, but is easily displaced. Therefore, in order to enhance the fit in the wearer's back and suppress such a shift, a waist gather, a stretchable film, urethane, or the like is often mounted on the rear waist region 30 of the absorbent body 2. However, this results in an increase in cost.

  Here, by configuring as described above, when the disposable diaper 1 is worn, as shown in FIGS. 3 and 4, an extension line of the force F <b> 1 that the wear assistant pulls the fastening tape 4 outward in the product width direction W is shown. However, since it passes over the absorber 10, the force F1 is easily transmitted to the absorber 10, and the interlocking between the side flaps 3 and the absorber 10 is improved.

  As a result, it is possible to improve the fit in the wearer's back (in the waistline direction) without mounting waist gathers, stretchable films, urethane, etc., and to suppress the displacement of the disposable diaper 1 at low cost. .

  Moreover, according to the above-mentioned structure, since the fitting property in a wearer's back part (trunk circumference direction) can be improved, a clearance gap is made between the back waist area 30 of the absorber main body 2 and a wearer's back part. It becomes difficult, and liquid excrement such as urine and soft stool is difficult to leak from between the rear waist region 30 of the absorbent body 2 and the back part of the wearer.

  Moreover, according to the above-described configuration, when the disposable diaper 1 is worn, as shown in FIGS. 3 and 4, when the wearing assistant pulls the fastening tape 4 outward in the product width direction W, the absorbent body 10 is moved. It becomes easy to spread outside the product width direction W, the area of the absorber 10 can be increased, and the amount of absorption in the absorber 10 can be increased.

  Moreover, as shown in FIG. 1, the pressing groove 100 may be formed at least on the top sheet 11 side of the absorbent body 10.

  According to such a configuration, the absorbent core 10A and the core wrap 10B can be integrated by the compressed groove 100, and the rigidity of the absorbent body 10 can be increased.

  Further, when the core wrap 10B is a tissue, an HMA (Hot Melt Adhesive) type adhesive used for joining the absorbent body 10 and the back sheet 12 (or the top sheet 11) and a tissue constituting the core wrap 10B Therefore, even after the absorber 10 has absorbed urine or the like, the absorber 10 (that is, the core wrap 10B) and the back sheet 12 (or the top sheet 11) are hardly peeled off. Can play.

  Moreover, the effect that it is hard to peel off the absorber 10 and the core wrap 10B can also be show | played.

  In addition, from the viewpoint of the softness of the absorbent body, the compressed groove 100 may not be formed on the topsheet 11 side of the absorbent body 10.

  Here, as shown in FIG. 1, the compressed groove 100 may be a lattice-shaped compressed groove 100 having a linear shape or a broken line shape. Specifically, the extending direction of the compressed groove 100 is configured to be different from the product longitudinal direction L and the product width direction W.

  According to such a configuration, as shown in FIG. 5, the force F <b> 1 by which the wear assistant pulls the fastening tape 4 to the outside in the product width direction W is dispersed in the extending direction of the compressed groove 100, and thus the absorbent body 10 as a whole. Can be uniformly spread outside the product width direction W.

   Moreover, according to this feature, as shown in FIG. 5, the force F <b> 2 that contracts toward the center in the product longitudinal direction L applied to the absorbent body 2 by the leg gather 5 is dispersed in the extending direction of the compressed groove 100. Therefore, the length of the absorbent body 2 in the product longitudinal direction L can be maintained at a desired length, the disposable diaper 1 becomes difficult to slip, and the rear waistline region 30 of the absorbent body 2 and the wearer's Liquid excrement such as urine and loose stool is difficult to leak from between the back part.

  As shown in FIG. 1, the leg gathers 5 may be arranged on the extension line of the end E <b> 3 on the crotch region 25 side of the side flap 3.

  According to this configuration, as shown in FIG. 6, when the disposable diaper 1 is worn, the force F1 that the wear assistant pulls the fastening tape 4 to the outside in the product width direction W is transmitted to the leg gathers 5. And the interlocking | linkage of the leg gather 5 can be improved and the absorber main body 2 can be made to fit a wearer's crotch part firmly.

  Moreover, according to this structure, the interlocking | linkage of the side flap 3 and the leg gather 5 can be improved, and even if a large amount of urine etc. are excreted, the disposable diaper 1 will slip | deviate downward. Can be suppressed.

  Furthermore, according to this configuration, when the disposable diaper 1 is worn, the absorbent body 10 can be easily adapted to the wearer's body along the compressed groove 100, so that the fit between the absorbent body 10 and the wearer's body is improved. Can be made.

  The basis weight of the absorber 10 may be configured to be uniform, and the basis weight of the absorber 10 in the rear waistline region 30 is configured to be higher than the basis weight of the absorber 10 in the crotch region 25. May be.

  According to such a configuration, the rigidity of the absorbent body 10 at least in the rear waistline region 30 is increased, so that an effect that the interlocking with the side flap 3 is improved can be achieved.

  Here, the basis weight of the absorber 10 can be measured by, for example, the following measuring method.

  First, the folded absorbent article 1 is developed, and the thickness and area of the portion where the basis weight is measured are measured.

  2ndly, the part which measures a fabric weight is cut out from the absorbent article 1, and the weight of the cut-out part is measured.

  Third, parts other than the absorbent body 10 such as the top sheet 11 and the back sheet 12 are removed from the cut out part, and the weight of the absorbent body 10 is measured.

  4thly, the fabric weight of the absorber 10 is calculated based on the weight of the absorber 10, and the area of the part which measures a fabric weight.

  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 ... Absorber body 3 ... Side flap 4 ... Target tape 5 ... Leg gather 10 ... Absorber 11 ... Top sheet 12 ... Back sheet 20 ... Front waist area 25 ... Inseam area 30 ... Back waist area 100 ... Squeeze groove

Claims (7)

Having a product longitudinal direction and a product width direction orthogonal to the product longitudinal direction;
An absorbent body comprising a top sheet, a back sheet, and an absorbent body disposed between the top sheet and the back sheet;
The absorbent body is a disposable diaper having a front waistline region, a back waistline region, and a crotch region located between the front waistline region and the back waistline region,
In the rear waistline region, a pair of side flaps that can extend and contract so as to extend from the side edges of the absorbent body in the product width direction,
Fastening tape is provided so as to extend from the side edge of the product width direction of each of the pair of side flaps,
The length in the product longitudinal direction at the side edge portion in the product width direction of the side flap is configured to be shorter than the length in the product longitudinal direction at the root portion of the side flap,
The rear waistline side end of the region where the absorber is disposed is disposed closer to the rear waistline than the straight line connecting the rear waistline side ends of each of the fastening tapes. And
The absorbent body is provided with leg gathers,
The leg gather is arranged on an extension line of the end portion on the crotch region side of the side flap ,
The front end edge of the leg gather is located in front of the front end edge of the absorber,
The leg gather is located on the inner side in the product width direction than the region where the side flap and the absorber body overlap, and does not overlap the overlapping region,
On the top sheet side of the absorber, lattice-shaped pressing grooves are formed,
The disposable diaper characterized in that the extending direction of the compressed groove is different from the product longitudinal direction and the product width direction . The front end edge of the joined portion that joins the side flap and the absorber body is located on the front side of the rear end edge of the leg gather,
2. The disposable diaper according to claim 1, wherein a rear end edge of a joint portion that joins the side flap and the absorbent body is located on a rear side of a rear end edge of the leg gather. The disposable diaper according to claim 1 or 2, wherein the weight of the absorber is configured to be uniform. The disposable diaper according to claim 1 or 2 , wherein the basis weight of the absorbent body in the rear waistline region is configured to be higher than the basis weight of the absorbent body in the crotch region. The disposable diaper according to any one of claims 1 to 4, wherein the compressed groove has a linear shape or a broken line shape. The disposable diaper according to any one of claims 1 to 5 , wherein the core wrap constituting the absorbent body is made of a tissue.   The disposable diaper according to any one of claims 1 to 6, wherein a waist gather, an elastic film, and urethane are not disposed in the rear waistline region of the absorbent body.

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