JP2018166936A - Absorbent article - Google Patents

Abstract

To provide an absorbent article where a bending shape can be easily formed, and the formed bending shape is easily retained.SOLUTION: An absorbent article according to the present invention has a longitudinal direction and a width direction perpendicular to the longitudinal direction, and includes an absorber, a core wrap sheet laminated at least on a skin non-facing surface of the absorber, a sheet-shaped skin facing surface side member positioned on a skin facing surface side with respect to the absorber, and a sheet-shaped skin non-facing surface side member positioned on a skin non-facing surface side with respect to the core wrap sheet. The absorber has a pair of bending grooves in the longitudinal direction, and at least a part of the core wrap sheet laminated on the skin non-facing surface of the absorber has extensibility in the width direction.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an absorbent article.

  Absorbent articles such as sanitary napkins and disposable diapers absorb excretion fluid such as urine with an absorber. In a general absorbent article, an absorbent body composed of absorbent fibers and a super absorbent polymer (SAP) is provided between a liquid-permeable top sheet and a liquid-impermeable back sheet. Yes. Such an absorbent article has a configuration in which the skin-facing surface of the absorber is covered with a top sheet, and the non-skin-facing surface of the absorber is covered with a back sheet. For this reason, the liquid such as urine excreted by the wearer passes through the top sheet and is absorbed and held by the absorber. In addition, the liquid held in the absorber is prevented from leaking to the outside by a liquid-impermeable back sheet disposed on the back side of the absorber.

  The absorbent body in the absorbent article is a member that is easily affected by the movement of the wearer's body. For this reason, depending on how the wearer moves, the absorbent body may be twisted or broken, and the excretory fluid may leak. Moreover, since an absorber is a member with strong rigidity among the members which comprise an absorbent article, when a wearer wears an absorbent article, the discomfort by the rigidity of an absorber may be felt. For this reason, in the absorbent article, studies have been made for preventing leakage of excretory fluid and improving the wearer's wearing feeling.

  For example, Patent Document 1 discloses a disposable diaper in which three bent portions are formed along the length direction of the absorber. In such a disposable diaper, the peripheral portion of each slit is bent when worn, and the central peripheral portion of the slit is convex toward the wearer's excretion opening. Further, the side peripheral portion of the slit is convex on the side opposite to the central slit peripheral portion. That is, the cross-sectional shape of the absorber along the width direction of the absorber is deformed into a W shape. Thus, it has been studied that the shape of the absorbent body is deformed when the absorbent article is worn, thereby preventing leakage of excretory fluid and further improving the wearing feeling.

Japanese Patent No. 5486348

  However, in the disposable diaper of patent document 1, although an absorber bends along three bending parts, the member arrange | positioned on the skin non-opposing surface side rather than an absorber stretches in the direction which returns a bent shape. For this reason, it has been clarified by the present inventors that the bent shape is difficult to maintain.

  Therefore, in order to solve the problems of the prior art, the present inventors proceeded with studies for the purpose of providing an absorbent article that can easily form a bent shape and that can maintain the formed bent shape. It was.

As a result of earnest studies to solve the above problems, the present inventors have obtained an absorbent body, a core wrap sheet laminated on at least the non-skin facing surface of the absorbent body, a sheet-like skin facing surface side member, And a sheet-shaped non-facing surface side member, wherein a pair of bending grooves are formed along the longitudinal direction of the absorbent body, and at least a part of the core wrap sheet is stretchable in the width direction. It has been found that an absorbent article can be obtained that is easy to form a bent shape and can maintain the formed bent shape.
Specifically, the present invention has the following configuration.

[1] It has a longitudinal direction and a width direction orthogonal to the longitudinal direction,
An absorber,
A core wrap sheet laminated on at least the skin non-facing surface of the absorber;
A sheet-like skin-facing surface side member located on the skin-facing surface side from the absorbent body;
A sheet-like skin non-facing surface side member located on the skin non-facing surface side of the core wrap sheet,
The absorber has a pair of bent grooves along the longitudinal direction,
At least a part of the core wrap sheet laminated on the skin non-facing surface of the absorbent body is an absorbent article having extensibility in the width direction.
[2] The absorbent article according to [1], wherein the core wrap sheet is directly laminated on at least the non-skin facing surface of the absorbent body.
[3] The core wrap sheet laminated on at least the non-skin-facing surface of the absorbent body has at least a stretched portion having extensibility in the width direction, and the stretched portion overlaps the bending groove [1] or The absorbent article as described in [2].
[4] The absorbent article according to any one of [1] to [3], wherein the core wrap sheet laminated on the non-skin facing surface of the absorbent body is a nonwoven fabric having extensibility.
[5] The absorbent article according to any one of [1] to [4], wherein at least a part of the skin non-facing surface side member has extensibility.
[6] The absorbent article according to any one of [1] to [5], in which the contact surface between the absorbent body and the core wrap sheet is joined at least partially.
[7] The absorbent article according to any one of [1] to [6], wherein the absorbent body and the core wrap sheet are not joined on the skin non-facing surface side of the bent groove.
[8] The absorbent article has a pair of support elastic members extending in the longitudinal direction,
The absorbent article according to any one of [1] to [7], wherein the support elastic member is superimposed on an absorber-side end region on the outer side in the width direction of the pair of bending grooves.
[9] The absorbent article according to [8], wherein the longitudinal length of the support elastic member is longer than the longitudinal length of the bent groove.
[10] The absorbent article according to [8] or [9], wherein the support elastic member is provided on the skin non-facing surface side of the absorbent body.
[11] The absorbent article according to any one of [1] to [10], wherein the absorber further includes a diffusion groove in a non-bent region.

  ADVANTAGE OF THE INVENTION According to this invention, the absorbent article which is easy to form a bending shape and is easy to maintain the bending shape formed can be obtained.

FIG. 1 is a plan view showing an example of an absorbent article. FIG. 2 is a cross-sectional view showing an example of an absorbent article. FIG. 3 is a cross-sectional view showing an example of an absorbent article. FIG. 4 is an exploded view in which the absorbent body having the core wrap sheet is exploded. FIG. 5 is a cross-sectional view showing an absorbent article having a W-shaped bent shape. FIG. 6 is a plan view showing an example of an absorbent article. FIG. 7 is an exploded view in which the absorbent article is exploded. FIG. 8 is a plan view showing an example of an absorbent article.

  Hereinafter, the present invention will be described in detail. The description of the constituent elements described below may be made based on representative embodiments and specific examples, but the present invention is not limited to such embodiments.

In the present specification, the “longitudinal direction” means a direction in the absorbent article that connects the front body located on the wearer's abdomen side and the back body located on the wearer's back side. The “width direction” means a direction perpendicular to the longitudinal direction of the absorbent article.
Moreover, in this specification, a "skin opposing surface" means the surface which opposes a wearer's skin at the time of wear of an absorbent article. The “non-skin facing surface” means a surface that does not face the wearer's skin when the absorbent article is worn. In the present specification, “A to B” means “A or more and B or less”.

  The present invention has a longitudinal direction and a width direction orthogonal to the longitudinal direction, the absorbent body, a core wrap sheet laminated on at least the skin non-facing surface of the absorbent body, and positioned on the skin facing surface side of the absorbent body. It is related with an absorbent article provided with the sheet-like skin opposing surface side member to perform, and the sheet-like skin non-facing surface side member located in the skin non-opposing surface side rather than a core wrap sheet. Here, the absorber has a pair of bent grooves along the longitudinal direction. And at least one part of the core wrap sheet | seat laminated | stacked on the skin non-opposing surface of an absorber has a stretching property in the width direction. In this specification, the core wrap sheet having extensibility is a state in which the core wrap sheet in a natural state (unstretched state) does not overlap and is not in a crease shape, and has a width when pulled outward in the width direction. It stretches in the direction. Further, the stretchability includes both stretchability and stretchability, and the core wrap sheet having stretchability may have a property capable of stretching or shrinking, or may have a property of plastic deformation. Good. Among these, the core wrap sheet having extensibility is preferably a sheet that undergoes plastic deformation from the viewpoint of maintaining a bent shape.

  In addition, in this specification, when at least one part of a core wrap sheet | seat expand | extends in the width direction, the core wrap sheet laminated | stacked on the skin non-facing surface of an absorber extends | stretches at least 1.1 times or more in the width direction. Specifically, the length in the width direction (the length in the width direction of the unstretched core wrap sheet) before applying a force in the width direction to the core wrap sheet laminated on the non-skin facing surface of the absorber is P and In this case, the length in the width direction (length in the width direction of the stretched core wrap sheet) is 1.1 P or more when the left and right ends of the core wrap sheet are gripped and pulled outward in the width direction. It is preferably 3P or more. That is, the stretch rate of the core wrap sheet laminated on the non-skin facing surface of the absorber is preferably 110% or more, and more preferably 130% or more.

  The core wrap sheet laminated on the non-skin-facing surface of the absorbent body preferably has all extensible properties, but for example, only the side edges and the central portion of the core wrap sheet have extensible properties. May be. In the present invention, even in such a core wrap sheet that is partially extensible, the length in the width direction when pulled outward in the width direction is 1.1 times or more.

  The form of the absorbent article of the present invention is not particularly limited, but the absorbent article may be an absorbent pad. Examples of such an absorbent pad include sanitary napkins and urine. Take paddles. Moreover, the absorbent article of this invention may be related to a disposable diaper.

  FIG. 1 is a plan view showing an embodiment of an absorbent article 100 according to the present invention. As shown in FIG. 1, the absorbent article 100 includes a front body 1 located on the wearer's abdomen side, a back body 2 located on the wearer's back side, and a crotch 3 located therebetween. And can be divided in the longitudinal direction. The front body 1, the crotch part 3, and the back body 2 can also be made into each area | region when an absorbent article is divided into 3 equal to a longitudinal direction. Moreover, when the absorber 31 has the area | region narrowed in the width direction, the part containing the area | region is made into the crotch part 3, and the area | region adjacent to the longitudinal direction of the crotch part 3 is made into the front body 1 and the back body 2, respectively. You can also. An absorbent body 31 for absorbing and holding a liquid such as urine is disposed from the back body 2 to the front body 1 with the crotch 3 as a center. The absorber 31 is a sheet-like skin-facing surface side member 32 positioned on the skin-opposing surface side of the absorber 31 and a sheet-shaped skin-non-facing surface side member positioned on the skin-non-facing surface side of the absorber 31. 33. Excreted fluid such as urine passes through the skin facing surface side member 32 and is absorbed and held by the absorbent body 31, and leakage to the outside is prevented by the skin non-facing surface side member 33. In addition, the core wrap sheet | seat 35 is laminated | stacked on the skin non-opposing surface of the absorber 31 at least. The core wrap sheet 35 may be laminated on the skin facing surface of the absorbent body 31, and the core wrap sheet 35 may be a member that encapsulates the entire absorbent body 31.

  In FIG. 1, the width direction of the absorbent article 100 is drawn as the same width in all regions, but the front body 1 and the back body 2 of the absorbent article 100 are portions extending to the left and right outer sides in the width direction. Side flaps may be provided. For example, when the absorbent article 100 is a tape-type disposable diaper, the shape of the side flaps may be changed as necessary. Further, when the absorbent article 100 is a tape-type disposable diaper, a fastening tape is attached so as to extend from the left and right side edges of the side flaps of the back body 2, and the fastening tape is fixed to the front body 1. You may attach the front patch for attaching. By setting it as such a structure, the absorbent article 100 is the fastening tape attached to the back body 2 in the state which applied the back body 2 to the wearer's back part, and applied the front body 1 to the wearer's abdomen. Can be attached to the wearer's body by fastening to the front patch provided on the front body 1.

  FIG. 2 is a cross-sectional view schematically showing a cross-sectional structure of the absorbent article 100 along the line XX shown in FIG. As shown in FIG. 2, the absorbent article 100 basically includes a skin facing surface side member 32, a skin non-facing surface side member 33, and an absorbent body 31 sandwiched therebetween. Moreover, it is preferable that the core wrap sheet | seat 35 is laminated | stacked on the skin non-opposing surface at least of the absorber 31, and the core wrap sheet | seat 35 is laminated | stacked directly on the skin non-opposing surface of the absorber 31 directly. The core wrap sheet 35 is preferably laminated directly on both surfaces of the absorbent body 31, and the absorbent body 31 is more preferably encapsulated in the core wrap sheet 35.

  The core wrap sheet 35 is preferably laminated directly on at least the non-skin facing surface of the absorbent body 31, but another sheet may be sandwiched between the absorbent body 31 and the core wrap sheet 35. Such a sheet may exhibit a function of improving the absorption rate and diffusion rate of the excretory fluid and preventing the absorber 31 from being out of shape. Examples of the material constituting the other sheet include a woven fabric, a nonwoven fabric, and 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. Examples of the nonwoven fabric include air-through nonwoven fabric, point bond nonwoven fabric, spunbond nonwoven fabric, and melt blown nonwoven fabric.

  In the cross-sectional view of FIG. 2, in the central region in the width direction of the absorbent article 100, from the skin facing surface side, the skin facing surface side member 32, the absorbent body 31 encapsulated in the core wrap sheet 35 and the skin non-facing surface. The side members 33 are stacked in this order. As shown in FIGS. 1 and 2, at least a part of the skin facing surface side member 32 and the skin non-facing surface side member 33 are joined to each other around the absorber 31. Thereby, the absorber 31 is surrounded by the joint portion between the skin facing surface side member 32 and the skin non-facing surface side member 33.

  The skin facing surface side member 32 is a member laminated on the skin facing surface side with respect to the absorbent body 31. When the absorbent body 31 also has the core wrap sheet 35 on the skin facing surface side, the skin facing surface side member 32 is a member that is laminated closer to the skin facing surface side than the core wrap sheet 35 on the skin facing surface side. is there. The skin facing surface side member 32 is preferably a sheet-like member, and may be a single-layer sheet-like member or a two-layer or more sheet-like member. Examples of the skin facing surface side member 32 include a liquid permeable top sheet 32a. Examples of the liquid permeable material constituting the top sheet include a woven fabric, a nonwoven fabric, and 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. Examples of the nonwoven fabric include air-through nonwoven fabric, point bond nonwoven fabric, spunbond nonwoven fabric, and melt blown nonwoven fabric.

  The skin non-facing surface side member 33 is a member laminated on the skin non-facing surface side of the absorbent body 31, and on the skin non-facing surface side of the core wrap sheet 35 laminated on the skin non-facing surface side of the absorbent body 31. It is a member to be laminated. The skin non-facing surface side member 33 is preferably a sheet-like member, and may be a single-layer sheet-like member or a two-layer or more sheet-like member. Examples of the skin non-facing surface side member 33 include a liquid-impermeable back sheet 33a and / or a cover sheet 33b.

  The back sheet 33 a is a member for preventing the liquid that has passed through the top sheet 32 a and absorbed by the absorber 31 from leaking to the outside of the absorbent article 100. For this reason, the back sheet 33a is made of a liquid-impermeable material. The back sheet 33a covers the absorber 31 from the skin non-facing surface side in order to prevent liquid leakage from the bottom surface of the absorber 31. An example of the impermeable material constituting the back sheet 33a is a liquid impermeable film made of polyethylene resin. However, in order to ensure air permeability, it is preferable to use a microporous polyethylene film in which a plurality of fine pores of 0.1 to 4 μm are formed.

  The cover sheet 33b is a sheet that covers the outer surfaces of the front body 1, the crotch part 3, and the back body 2, and is a member that reinforces the back sheet 33a and improves its feel. The cover sheet 33b is bonded to the skin non-facing surface side of the back sheet 33a. As a material constituting the cover sheet 33b, a woven fabric or a non-woven fabric is used. In particular, it is preferable to use a nonwoven fabric or a wet nonwoven fabric made of a thermoplastic resin such as polyethylene, polypropylene, or polyester as a material constituting the cover sheet 33b.

  The absorber 31 is made of an absorbent material in order to absorb and hold the wearer's urine and body fluid. As the absorbent material, for example, fluff pulp, super absorbent polymer (“SAP”), a hydrophilic sheet or the like can be used. An example of fluff pulp is a defibrated wood pulp or non-wood pulp. An example of a superabsorbent polymer is sodium polyacrylate. As the hydrophilic sheet, for example, tissue, absorbent paper, or a nonwoven fabric subjected to a hydrophilic treatment can be used. As the absorbent material, one type of fluff pulp, super absorbent polymer, or hydrophilic sheet may be used alone, or two or more types may be used in combination.

  The absorber 31 has a pair of bending grooves 60 along the longitudinal direction. The bending groove 60 may be a pair of grooves extending along the longitudinal direction. In the present specification, the bent groove 60 refers to a part or all of which is constituted by a recess.

The bent groove 60 is preferably arranged in parallel to the longitudinal direction. The bent grooves 60 are preferably formed so as to be paired with the center line C in the width direction of the absorber 31 interposed therebetween, and the pair of bent grooves 60 are symmetrical with respect to the center line C in the width direction of the absorber 31. It is preferable that they are arranged symmetrically about the axis.
The bending groove 60 may be disposed so that the midpoint of the bending groove 60 is closer to the front body 1 side than the longitudinal center line of the absorber 31, but is bent on the longitudinal center line of the absorber 31. It is preferable that the grooves 60 are disposed so that the midpoints in the longitudinal direction come. That is, the bent groove 60 is preferably disposed in a region centered on the crotch 3.

  The length of the bending groove 60 in the longitudinal direction is preferably 10% or more, more preferably 20% or more, and further preferably 30% or more with respect to the total length in the longitudinal direction of the absorber. The longitudinal length of the bent groove 60 is preferably 70% or less, more preferably 60% or less, and further preferably 50% or less with respect to the total length in the longitudinal direction of the absorber. .

  The width of the bending groove 60 is preferably 1 to 10 mm, and more preferably 1 to 5 mm. The width of the bending groove 60 may be the same width in the depth direction of the bending groove 60, or the width may be narrowed along the depth direction of the bending groove 60. When the width is narrow along the depth direction of the bent groove 60, the width of the bent groove 60 is the maximum width of the bent groove 60.

  The bent grooves 60 are preferably a total of two bent grooves that are paired one by one, but may be a pair of bent grooves arranged in plural. For example, the bending groove 60 may be a total of four bending grooves 60 in which two pairs form a pair and the pair forms a pair. The number of the bent grooves is preferably 2 or more and 6 or less.

  In the absorber 31, when the shortest distance in the width direction of the region where the bent groove 60 is formed is Lmm, the distance in the width direction between the bent grooves 60 constituting the pair is 0.2 × Lmm to 0.8 × Lmm. It is preferable that it is 0.2 * Lmm-0.5 * Lmm. When each of the pairs is configured by a plurality of bent grooves 60, the distance in the width direction between the bent grooves 60 is the distance between the bent grooves 60 located on the outermost side in the width direction of the absorber 31. By setting the distance in the width direction between the bent grooves 60 within the above range, a bent shape can be easily formed, and the wearing feeling can be further enhanced.

  The bent groove 60 is preferably a linear groove extending in the longitudinal direction. However, as long as the absorbent article 100 can be bent along the bending groove 60, it may have a bow shape or may meander.

  The bent groove 60 may be formed only in the absorbent body 31 or may be formed in both the absorbent body 31 and the skin facing surface side member 32. For example, the bending groove 60 may be obtained by forming a recess in the absorbent core 31 and the core wrap sheet 35 laminated on the skin facing surface of the absorbent body 31, as shown in FIG. . Moreover, the bending groove | channel 60 is obtained by forming a recessed part in the core wrap sheet | seat 35 laminated | stacked on the skin opposing surface side rather than the absorber 31, and the top sheet 32a, as FIG. 3 shows. May be used.

  The bent groove 60 can be formed by reducing the basis weight of the absorber in the bent groove portion or by embossing (squeezing) the absorber 31. When the basis weight of the absorbent body in the bent groove 60 portion is reduced, the forming drum used in the step of forming the absorbent material constituting the absorbent body 31 into a sheet shape having a predetermined shape is an uneven surface corresponding to the shape of the bent groove 60. Is preferably provided on the outer periphery of the drum. In the forming drum, since suction is performed toward the inside of the drum, the absorber 31 in which the bent groove 60 is formed along the uneven surface on the outer periphery of the drum is obtained. Thereafter, a core wrap sheet 35 is laminated on the absorbent body 31, and the absorbent body 31 having the core wrap sheet 35 is sandwiched between the skin facing surface side member 32 and the skin non-facing surface side member 33.

  When the bending groove 60 is formed by embossing (squeezing) the absorbent body 31, the embossing may be performed from the skin facing surface side, the skin non-facing surface side, or the both surface side of the absorbent body 31. In this case, the embossing is preferably performed in a state where the core wrap sheet 35 is laminated on the absorbent body 31. The embossing roll has irregularities corresponding to the shape of the bending groove 60, and the bending groove 60 can be formed in the absorber 31 by pressing the embossing roll while rotating from the skin facing surface side. In addition, embossing may be given in the state which laminated | stacked the skin opposing surface side member 32 (top sheet 32a), and even if it adhere | attaches the skin opposing surface side member 32 and the absorber 31 simultaneously in an embossing process. Good. Moreover, in the embossing process, you may adhere | attach the skin non-facing surface side member 33 and the absorber 31 simultaneously.

  In the present invention, the bent groove 60 is preferably formed by embossing. In the bent groove 60 formed in this way, the density of the absorbent material on the skin non-facing surface side of the bent groove 60 is increased, so that the absorbent article 100 is easily bent along the bent groove 60. That is, it becomes possible to bend accurately at a predetermined position. Such embossing is preferably performed from the skin facing surface side of the absorbent body 31. That is, the bending groove 60 is preferably present on the skin facing surface side.

  At least a part of the core wrap sheet 35 laminated on the skin non-facing surface of the absorbent body 31 is extensible. The core wrap sheet 35 laminated on the skin non-facing surface is preferably entirely stretchable, but a part of the core wrap sheet 35 laminated on the skin non-facing surface has stretchability. Also good. In this case, it is preferable that the core wrap sheet laminated on at least the non-skin-facing surface of the absorbent body has at least a stretch portion having extensibility in the width direction, and the stretch portion overlaps the bending groove 60. The extending portion may be provided in a region other than the region overlapping the bent groove 60.

  In the case where the entire core wrap sheet 35 laminated on the skin non-facing surface is extensible, the core wrap sheet 35 on the skin non-facing surface is preferably a series of stretch sheets. Examples of the extensible sheet include a non-woven fabric having extensibility, a film having extensibility, and a composite sheet including an elastic material having extensibility. Examples of the nonwoven fabric having extensibility include a nonwoven fabric composed of crimped fibers obtained by melting and spinning a thermoplastic synthetic resin such as polyurethane, polypropylene, polyethylene, and polyester. Examples of the stretchable film include thermoplastic synthetic resin films such as polyurethane, polypropylene, polyethylene, and polyester. Among these, the extensible sheet is preferably a non-woven fabric having extensibility.

  When a part of the core wrap sheet 35 laminated on the skin non-facing surface has stretchability, the core wrap sheet 35 on the skin non-facing surface becomes a sheet having an extending portion in a part in the width direction. A sheet having an extending portion in a part in the width direction can be manufactured by, for example, partially bonding an elastic member or joining the expandable sheet into a single sheet. Further, it can also be manufactured by processing a part of a sheet that can be stretched entirely so as not to be stretched except for a stretching function.

  As the core wrap sheet 35 laminated on the skin non-facing surface, one of the above-described extensible sheets may be used alone, or a laminate of two or more may be used. In addition, when the core wrap sheet 35 laminated | stacked on a skin opposing surface is a thing which does not have a stretching property, as such a core wrap sheet 35, tissue paper, an absorbent paper, the nonwoven fabric which performed the hydrophilic treatment, etc., for example Can be used as appropriate.

  In FIG. 2, the core wrap sheet 35 on the skin non-facing surface side having extensibility is shown in black. In addition, in FIG. 2, although the embodiment in case only the core wrap sheet | seat of the skin non-opposing surface side has a stretching property is drawn, the core wrap sheet | seat 35 is also on the skin opposing surface side of the absorber 31. When present or when the core wrap sheet 35 encapsulates the absorber 31, not only the core wrap sheet on the skin non-facing surface side but also the core wrap sheet on the skin facing surface side or the entire core wrap sheet is stretched. It may have sex. In such a case, it is preferable that the core-wrap sheet on the skin facing surface side or the entire core-wrap sheet is configured from the above-described extensible sheet.

FIG. 4 is an exploded view in which the absorber 31 having the core wrap sheet 35 is exploded. FIG. 4 is an exploded view before the absorbent body 31 is sandwiched between the two core wrap sheets 35. The absorber 31 is formed with the bent groove 60 as described above. Further, the core wrap sheet 35 on the non-facing surface side is entirely extensible. In addition, in FIG. 4, although the core wrap sheet | seat 35 of the skin opposing surface side has shown the embodiment in case it does not have a stretching property, the core wrap sheet | seat 35 of the skin opposing surface side is also the skin non-opposing surface side. Similar to the core wrap sheet 35, it may have extensibility. When the respective constituent members are overlapped and joined, they are laminated and joined so that the center lines (C _{1 to} C ₃ ) represented by the one-dot chain line in FIG. In this way, the absorbent body 31 having the core wrap sheet 35 is obtained. It is preferable to make the absorbent body 31 having the core wrap sheet 35 by laminating and bonding the core wrap sheet 35 on the skin facing surface side, the absorbent body 31, and the core wrap sheet 35 on the skin non-facing surface side. .

  In the present invention, not only the core wrap sheet 35 on the skin non-facing surface side but also at least a part of the skin non-facing surface side member 33 may have extensibility. For example, at least a part of at least one selected from the back sheet 33a and the cover sheet 33b may be extensible. In addition, at least one selected from the back sheet 33a and the cover sheet 33b is preferably an extensible sheet, and both the back sheet 33a and the cover sheet 33b are more preferably extensible sheets.

At the time of mounting, the absorbent article 100 is bent along the pair of bending grooves 60. At that time, the cross-sectional shape in the width direction of the absorbent article 100 may be deformed to be W-shaped, or the cross-sectional shape in the width direction of the absorbent article 100 may be deformed to be concave. . When the cross-sectional shape in the width direction of the absorbent article 100 is a concave shape, the region sandwiched between the bent grooves 60 is linear. In the present invention, the absorbent body 31 has a pair of bending grooves 60, and at least a part of the core wrap sheet 35 laminated on the non-skin-facing surface of the absorbent body 31 is extensible, as described above. A bent shape is easily formed, and the formed bent shape is easily maintained. This is because when the absorbent article 100 is worn, the core wrap sheet 35 on the skin non-facing surface side easily follows the shape change of the absorbent body 31 when the absorbent article 100 is worn. Therefore, the absorber 31 can easily form a bent shape, and the formed bent shape is difficult to be eliminated. Thereby, the bent shape formed in the absorber 31 is easily maintained. Further, the core wrap sheet 35 on the skin non-facing surface side preferably has an extensibility that causes plastic deformation, whereby the tension of the core wrap sheet 35 that works in the direction of canceling the bent shape can be weakened. The shape is easily maintained. In addition, the said effect becomes more remarkable by providing an extensible property also to at least one part of the skin non-facing surface side member 33. FIG.
As described above, when the absorbent article 100 is worn, the shape of the absorbent body 31 can be easily bent and the bent shape can be maintained, thereby effectively preventing leakage of excretory fluid. Moreover, even if it is a case where excretion liquid is absorbed in multiple times by maintaining a bending shape, excretion liquid can be absorbed reliably. Furthermore, the feeling of wearing at the time of wearing is not impaired by maintaining the bent shape.

  In particular, as shown in FIG. 5, the absorbent article 100 is preferably bent along a pair of bending grooves 60 and deformed so that the cross-sectional shape in the width direction of the absorbent article 100 becomes a W shape. . In this case, since the absorbent article 100 has the pair of bent grooves 60, the peripheral portions of the bent grooves 60 are bent so as to be convex toward the skin non-opposing surface side. The central region in the width direction of 100 becomes convex toward the wearer's excretion opening. Thus, when the absorbent article 100 is bent in a W shape, the central region can easily adhere to the excretion opening of the wearer, and the leakage of excretory fluid can be more effectively prevented. Furthermore, by maintaining the W-shaped bent shape, it is possible to further enhance the feeling of fitting and fit during wearing. In the present specification, the central region in the width direction of the absorbent article 100 is a region sandwiched between a pair of bent grooves 60.

  Around the absorber 31, at least a part of the skin facing surface side member 32 and the skin non-facing surface side member 33 are joined to each other. Moreover, when the core wrap sheet | seat 35 is laminated | stacked on the absorber 31, the contact surface of the absorber 31 and the core wrap sheet | seat 35 is joined at least partially. And each contact surface between each member which exists between the skin opposing surface side member 32 and the absorber 31 is joined at least partially, and it is between the skin non-opposing surface side member 33 and the absorber 31. Each contact surface between each existing member is joined at least partially. The bonding method may be, for example, adhesion using a hot melt adhesive or other highly fluid adhesive, or may be welding by heat, ultrasonic waves, or the like such as heat sealing.

  When the core wrap sheet 35 is laminated on the absorbent body 31, the contact surfaces of the absorbent body 31 and the core wrap sheet 35 may be joined in the entire contact area. On the other hand, a non-joining region may be provided in a specific region between the absorber 31 and the core wrap sheet 35. For example, it is also a preferable aspect to provide a non-joining region where the absorbent body 31 and the core wrap sheet 35 are not joined to the skin non-facing surface side of the bending groove 60 of the absorbent body 31. By providing the non-bonded region in this manner, the absorbent article 100 can easily form a bent shape and can easily maintain the formed bent shape.

  It is preferable that each contact surface between each member which exists between the skin opposing surface side member 32 and the absorber 31 is joined in the whole region which contacts. Moreover, although it is preferable that each contact surface between each member which exists between the skin non-opposing surface side member 33 and the absorber 31 is also joined in all the areas which contact, There may be a non-bonded region between the members existing between the absorbent bodies 31. As described above, a non-joined region where the absorbent body 31 and the core wrap sheet 35 are not joined may be provided on the skin non-facing surface side of the curved groove 60 of the absorbent body 31, or the curved groove 60 of the absorbent body 31. A non-joining region where the core wrap sheet 35 and the skin non-facing surface side member 33 are not joined may be provided on the skin non-facing surface side. The skin non-facing surface side of the bending groove 60 is a region located below the bending groove 60 in the cross-sectional view of FIG. 2 and the like, and is a portion overlapping the cross-sectional area of the bending groove 60 in the thickness direction. The cross-sectional area of the bent groove 60 refers to a cross-sectional area where the width of the bent groove is maximized.

When a non-joining region exists between members on the skin non-facing surface side of the bending groove 60, the non-joining region may be present at least at a part of the lower portion of the bending groove 60. That is, the area of the non-joining region may be smaller than the cross-sectional area of the bent groove 60. On the other hand, the entire region below the bent groove 60 may be a non-joined region. For example, the area of the non-bonded region may be the same as the cross-sectional area of the bent groove 60, and the non-bonded region and the bent groove may overlap in the thickness direction. Further, the area of the non-bonded region may be larger than the cross-sectional area of the bent groove 60.
In the present specification, the non-joining region refers to a region where adjacent members are not joined. Even if adjacent members are in contact with each other in the non-bonded region, the region is referred to as a non-bonded region when there is no physical bonding such as adhesion between the members.

  In this invention, it is preferable that each contact surface between each member which exists between the skin opposing surface side member 32 and the absorber 31 is joined in all the area | regions which contact. Especially, it is preferable that each contact surface between each member which exists between the skin opposing surface side member 32 and the absorber 31 is joined in the skin opposing surface side of the bending groove 60. FIG. Here, the skin facing surface of the bending groove 60 is a surface constituted by the side wall and the bottom wall of the bending groove 60. In addition, the cross-sectional shape of the thickness direction of the bending groove 60 may be a square shape, and in this case, the skin facing surface of the bending groove 60 in the absorber 31 is a surface formed of a side wall. In other words, on the inner side (inner wall) of the concave portion of the bent groove 60, it is preferable that the contact surfaces between the members existing between the skin facing surface side member 32 and the absorber 31 are joined.

  When the core wrap sheet 35 is laminated on the skin facing surface of the absorbent body 31, as shown in FIG. 2, the absorbent body 31 and the core wrap sheet 35 are joined on the skin facing surface side of the bending groove 60. It is preferable. As shown in FIG. 2, the top sheet 32 a that is the skin facing surface side member 32 is not joined to the core wrap sheet 35 on the skin facing surface side of the bending groove 60, and the concave inner wall of the bending groove 60 There may be a gap between the top sheets 32a. Moreover, when the core wrap sheet | seat 35 is laminated | stacked on the skin opposing surface of the absorber 31, as shown in FIG. 3, on the skin opposing surface side of the bending groove 60, all the skin opposing surface side members 32 are absorbers. 31 is preferably joined directly or indirectly. Specifically, the absorbent body 31 and the core wrap sheet 35 are joined on the skin facing surface side of the bending groove 60, and the top sheet 32a is joined on the core wrap sheet 35 in the joining region. As shown in FIG. 3, on the skin facing surface side of the bending groove 60, the respective contact surfaces between the members existing between the skin facing surface side member 32 and the absorber 31 are joined, whereby the absorber 31. Can be more effectively improved, and the accuracy of the bending position can be increased. Moreover, the skin facing surface side member 32 is not intended by joining the contact surfaces between the members existing between the skin facing surface side member 32 and the absorber 31 on the skin facing surface side of the bending groove 60. Occurrence of wrinkles and the like can be suppressed.

  In the present invention, the central region of the absorbent body 31 sandwiched between the pair of bending grooves 60, the core wrap sheet 35 laminated on the central region of the absorbent body 31, the skin facing surface side member 32, and the skin non-facing surface side member 33. The contact surfaces are preferably joined at least partially, and more preferably joined at a region including the center line C in the width direction of the absorber. The central region of the absorbent body 31 sandwiched between the pair of bending grooves 60 is a region including the center line C in the width direction of the absorbent body, and is a portion that is convex toward the wearer's excretion opening. In this central region, it is preferable that at least part of the skin facing surface side member 32, the absorbent body 31 having the core wrap sheet 35, and the skin non-facing surface side member 33 are all joined together. In addition, the skin facing surface side member 32, the absorbent body 31 having the core wrap sheet 35, and the skin non-facing surface side member 33 are joined to each other in all regions of the central region sandwiched between the pair of bending grooves 60. However, the skin facing surface side member 32, the absorbent body 31 having the core wrap sheet 35, and the skin non-facing surface side member 33 may be joined to each other in a partial region of the central region. For example, the skin facing surface side member 32, the absorbent body 31 having the core wrap sheet 35, and the skin non-facing surface side only in the peripheral region of the center line in the width direction among the center region sandwiched between the pair of bending grooves 60 The members 33 may be joined to each other, and intermittently face the skin facing surface side member 32, the absorbent body 31 having the core wrap sheet 35 in the longitudinal direction of the central region sandwiched between the pair of bending grooves 60, and the skin non-facing A joint portion of the surface side member 33 may be provided.

  In the present invention, the absorbent article 100 may have another groove structure different from the above-described bent groove in the center region in the width direction of the absorbent article 100.

  The absorbent article 100 of the present invention preferably has a pair of support elastic members 50 extending in the longitudinal direction. As the support elastic member 50, for example, rubber made of an elastic material such as natural rubber or synthetic rubber (urethane rubber or the like), a stretchable net, a stretchable film, or a stretchable foam (urethane foam or the like) can be employed. The support elastic member is fixed to other constituent members of the absorbent article 100 by an adhesive or other means. The fixing method may be, for example, adhesion using a hot melt adhesive or other highly fluid adhesive, or may be welding by heat, ultrasonic waves, or the like such as heat sealing. Further, the support elastic member 50 may be fixed to other constituent members of the absorbent article 100 by sewing.

  FIG. 6 is a development view showing an embodiment of the absorbent article 100 having the support elastic member 50. In FIG. 6, the support elastic member 50 that is not originally visually recognized is indicated by a two-dot chain line. It is preferable that at least a part of the support elastic member 50 overlaps the absorber 31. The state in which at least a part of the support elastic member 50 is overlapped with the absorbent body 31 means that at least a part of the support elastic member 50 in the thickness direction when the absorbent article 100 is expanded as shown in FIG. Exists in the region of the absorber 31. As shown in FIG. 6, it is more preferable that the entire support elastic member 50 overlaps with the absorber 31. In addition, as shown in FIG. 6, the support elastic member 50 is preferably superimposed on the side end region of the absorber 31 on the outer side in the width direction of the pair of bending grooves 60. By superimposing the support elastic member 50 on the side end region of the absorber 31, it becomes easier to maintain the bent shape.

  The support elastic member 50 is a member extending in the longitudinal direction in the absorbent article 100, and the component member to which the support elastic member 50 is fixed is not particularly limited. For example, the support elastic member 50 may be provided between the absorber 31 and the top sheet 32a, or may be provided between the absorber 31 and the back sheet 33a. Further, the support elastic member 50 may be provided between the back sheet 33a and the cover sheet 33b. Especially, it is preferable that the support elastic member 50 is provided in the skin non-facing surface side rather than the absorber 31. FIG. However, it is preferable that the support elastic member 50 is not exposed to the outer surface. That is, the support elastic member 50 is preferably disposed between the cover sheet 33b and the absorber 31, and is particularly preferably disposed between the cover sheet 33b and the back sheet 33a. Thereby, the support elastic member 50 can easily support the bent shape of the absorber 31 by lifting the absorber 31 to the skin surface side in the mounted state.

FIG. 7 is an exploded view in which the absorbent article 100 of the present invention is exploded. As shown in FIG. 7, the absorbent article 100 according to this embodiment is formed by sequentially joining a cover sheet 33 b, a back sheet 33 a, an absorber 31, and a top sheet 32 a that touches the wearer's skin in order from the outside. It is a thing. In FIG. 7, the absorber 31 shows a state of being encapsulated by the core wrap sheet 35. When the constituent members are overlapped and joined, they are laminated and joined so that the center lines (C _{11 to} C ₁₄ ) represented by the alternate long and short dash line in FIG. 7 overlap each other. In FIG. 7, the support elastic member 50 is provided between the back sheet 33a and the cover sheet 33b, and the support elastic member 50 is fixed to the cover sheet 33b.

  In the present invention, in the fixed region of the support elastic member 50, it is preferable that the contact surfaces of the members located between the skin facing surface side member and the skin non-facing surface side member are joined. Here, the fixed region of the support elastic member 50 refers to the maximum range of the region in which the support elastic member 50 is fixed to other constituent members of the absorbent article 100. For example, when the support elastic member 50 is fixed to the cover sheet 33b, the fixed region of the support elastic member 50 refers to the maximum range of the region where the support elastic member 50 is fixed to the cover sheet 33b. In addition, when the support elastic member 50 and the cover sheet 33b are intermittently fixed, the area | region located between the extreme ends of the fixing | fixed part of both ends is called a fixed area | region. When each of the pair of support elastic members 50 is composed of two or more elastic members, the region between the outermost and innermost elastic members among the two or more elastic members is a fixed region. That's it. In the present invention, in the fixing region of the support elastic member 50, the contact surfaces of the skin facing surface side member 32, the absorbent body 31 having the core wrap sheet 35, and the skin non-facing surface side member 33 are joined. The support elastic member 50 becomes easier to support the bent shape of the absorber 31.

  When the support elastic member 50 is fixed to another constituent member, the support elastic member 50 is fixed to the other constituent member in a stretched state. At this time, at least a part of the support elastic member 50 is fixed. After being fixed, the support elastic member 50 contracts, and a crease (gather) is formed at that time. In this specification, the heel (gather) formed when the support elastic member 50 contracts is called a support gather. A support gather raises absorber 31 to a wearer's skin side by applying force in the direction which makes absorber 31 contract in a longitudinal direction, and supports absorber 31.

  The longitudinal length of the fixing region of the support elastic member 50 is preferably 30% or more, more preferably 40% or more, and more preferably 50% or more with respect to the total length in the longitudinal direction of the absorber. Further preferred. Further, the length in the longitudinal direction of the fixing region of the support elastic member 50 is preferably 99% or less, more preferably 90% or less, and more preferably 80% or less with respect to the total length in the longitudinal direction of the absorber. Is more preferable, and it is especially preferable that it is 75% or less.

  The longitudinal length of the support elastic member 50 is preferably longer than the longitudinal length of the bent groove 60. In addition, the length in the longitudinal direction of the fixed region of the support elastic member 50 is more preferably longer than the length in the longitudinal direction of the bent groove 60. For example, when the longitudinal length of the fixed region of the support elastic member 50 is S and the longitudinal length of the bent groove 60 is T, the value of S / T is preferably 1.2 or more. It is more preferably 5 or more, and further preferably 2.0 or more.

  The support elastic member 50 is a pair of members extending in the longitudinal direction, and is preferably disposed in parallel to the longitudinal direction. However, the support elastic member 50 is not necessarily arranged parallel to the longitudinal direction as long as it can exert a contraction force so as to form the support gather as described above, and may be meandering, There may be.

  The support elastic members 50 may be a total of two elastic members that are paired one by one, but are preferably a pair of elastic members that are arranged in pairs. For example, the support elastic members 50 may be a total of four elastic members in which two pairs form a pair, and the pair may form a pair, and a total of six pairs in which the three pairs form a pair. It may be an elastic member of a book. The number of the total elastic members is preferably 2 or more and 20 or less, and more preferably 2 or more and 10 or less.

  The absorbent article 100 of the present invention may further include a diffusion groove 65, and preferably further includes a diffusion groove 65 in a non-bent region of the absorbent body 31. Here, the non-bending region in the longitudinal direction of the absorber 31 is a region from the longitudinal end of the bending groove 60 of the absorber 31 to the longitudinal end of the absorber 31, and the non-bending region is the absorber. There are two areas at 31. Note that the non-bending region is a region where the bending groove 60 does not extend, but a bending shape formed along the bending groove 60 may also be formed in the non-bending region.

  In the non-bent region in the longitudinal direction of the absorber 31, the region other than the diffusion groove 65 can be called a flat portion. The diffusion groove means a part or all of which is constituted by a recess.

  The diffusion groove 65 functions as a flow path for excretory fluid in the absorber 31. That is, the diffusion groove 65 can also be called a liquid channel. By providing such a diffusion groove 65 in the absorber 31, the diffusion groove 65 can exert a capillary force. Here, the capillary force is a force that can distribute the excretory fluid along the diffusion groove 65. Thereby, the absorber 31 can diffuse the excretory fluid along the flow path, and can rapidly absorb the excreted fluid excreted in a large amount in a wide area of the absorber 31. Moreover, the absorption of excretory fluid by the absorbent material can be efficiently performed without biasing the excretion of excretory fluid to only a part of the absorbent material constituting the absorber 31.

  In addition, by providing the diffusion groove 65 in the non-bent region of the absorber 31, it is possible to reduce the uncomfortable feeling caused by the rigidity of the absorber itself. In particular, by providing the groove portion in the non-bending region of the absorbent body 31, it is possible to reduce the uncomfortable feeling of the absorbent body in the abdomen and back. In addition, since the contact area between the absorbent body 31 and the skin can be reduced in the abdomen and the back, it is possible to eliminate stickiness and a sense of discomfort associated therewith. Furthermore, since the diffusion groove 65 also acts as a ventilation groove, the stuffiness when the absorbent body is mounted can be reduced.

  FIG. 8 is a plan view for explaining an example of a configuration pattern of the diffusion grooves 65 included in the absorber 31. The diffusion groove 65 is formed intermittently or connected in the longitudinal direction of the absorber 31. In FIG. 8, a plurality of linear diffusion grooves 65 are provided, and a lattice-shaped flat portion surrounded by the outer periphery of the diffusion grooves 65 is formed. In FIG. 8, the diffusion groove 65 is formed to be connected in the longitudinal direction of the absorber 31.

  The absorbent article 100 may be an absorbent pad, and examples of such an absorbent pad include a sanitary napkin and a urine pad. Moreover, the absorbent article 100 of the present invention may relate to a disposable diaper. Moreover, it is also possible to use an absorbent pad superimposed on the inner surface side of a pants-type or tape-type disposable diaper.

Disposable diapers are roughly classified into pants-type disposable diapers and tape-type disposable diapers. The pants-type disposable diaper is a disposable diaper having a structure in which both sides of a front body and a back body are joined in advance. The pants-type disposable diaper may be a cross-linked type having a configuration in which the absorbent main body cross-links between the front body exterior body and the back body exterior body formed separately. Moreover, the pants-type disposable diaper is an integral type in which the absorbent body is fixed around the crotch part to an exterior body that is integrally formed by hanging from the front part through the crotch part to the back part. Also good. The tape-type disposable diaper is a disposable diaper in which a joining tape is attached to both sides of the front body or the back body, and the front body and the back body are joined using the joining tape when worn.
When the absorbent article 100 is a disposable diaper or the like, a known configuration can be appropriately adopted as the other component members.

DESCRIPTION OF SYMBOLS 1 Front body 2 Back body 3 Crotch part 31 Absorber 32 Skin facing surface side member 32a Top sheet 33 Skin non-facing surface side member 33a Back sheet 33b Cover sheet 35 Core wrap sheet 50 Support elastic member 60 Bending groove 65 Diffusion groove 100 Absorption Sex goods

Claims (11)

Having a longitudinal direction and a width direction orthogonal to the longitudinal direction,
An absorber,
A core wrap sheet laminated on at least the skin non-facing surface of the absorber;
A sheet-like skin-facing surface side member located on the skin-facing surface side of the absorbent body;
A sheet-like skin non-facing surface side member located on the skin non-facing surface side of the core wrap sheet,
The absorber has a pair of bent grooves along the longitudinal direction,
At least a part of the core wrap sheet laminated on the skin non-facing surface of the absorbent body is an absorbent article having extensibility in the width direction.   The absorbent article according to claim 1, wherein the core wrap sheet is directly laminated on at least a non-skin facing surface of the absorbent body.   The core wrap sheet laminated on at least a non-skin-facing surface of the absorbent body has at least a stretch portion having extensibility in the width direction, and the stretch portion overlaps the bending groove. Or the absorbent article of 2.   The absorbent article according to any one of claims 1 to 3, wherein the core wrap sheet laminated on the non-skin facing surface of the absorbent body is a nonwoven fabric having extensibility.   The absorbent article according to claim 1, wherein at least a part of the skin non-facing surface side member has extensibility.   The absorbent article according to any one of claims 1 to 5, wherein a contact surface between the absorbent body and the core wrap sheet is joined at least partially.   The absorbent article according to any one of claims 1 to 6, wherein the absorbent body and the core wrap sheet are not joined on the skin non-facing surface side of the bent groove. The absorbent article has a pair of support elastic members extending in the longitudinal direction,
The absorbent article according to any one of claims 1 to 7, wherein the support elastic member is superimposed on an absorber-side end region on the outer side in the width direction of the pair of bent grooves.   The absorbent article according to claim 8, wherein a longitudinal length of the support elastic member is longer than a longitudinal length of the bent groove.   The absorptive article according to claim 8 or 9 in which said support elastic member is provided in the skin non-opposing surface side rather than said absorber.   The absorbent article according to any one of claims 1 to 10, wherein the absorbent body further includes a diffusion groove in a non-bent region.

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