JP2015104529A - Absorbent article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an absorbent article having favorable fit properties to the private parts and not being bulky to carry about.SOLUTION: The absorbent article includes a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorber disposed between the top sheet and the back sheet, and has a front part, an internal part and a back part in the longitudinal direction. The front part includes an odd number of continuing crests so as to alternately form apex parts and trough parts. The intermediate part has the width narrower than that of the front part. The back part has the width wider than a central part and narrower than the front part and includes at least one virtual embossed line extending into a substantially U shape from a trough part via the front part, the intermediate part, and the back, to another trough part.

Description

  The present invention relates to an absorbent article.

  In recent years, there has been an increase in middle-aged and older people causing stress urinary incontinence that occurs when coughing or sneezing, holding a heavy object, or urinary incontinence due to prostatic hypertrophy. In the case of urinary incontinence, even if it is a small amount, it is often not absorbed into the underwear, and it may cause stains on the bottoms and underwear, and odors may leak. A characteristic article will be attached.

  Such absorbent articles often have the same shape as absorbent articles such as sanitary napkins, that is, substantially rectangular and flat (see, for example, Patent Document 1). On the other hand, absorbent articles have been developed based on local structural differences between men and women. For example, Patent Document 2 includes a cup-shaped exterior body formed by thermoforming a nonwoven fabric sheet, a liquid-permeable top sheet, and an absorbent layer disposed between the exterior body and the top sheet. A male urine collecting body, the longitudinal center of the exterior body being narrower than its adjacent portion, and a flat portion that is in contact with the user's skin at the side edge of the exterior body An invention of a urine collecting body is disclosed.

JP 2009-148441 A JP 2011-62225 A

  However, a substantially rectangular and flat absorbent article, especially for men, has a tendency to change urination position, and it is difficult to obtain a local fit, so when urinary incontinence occurs, side leakage occurs. There was a problem that it was easy.

  Further, the dome-shaped absorbent article has a problem that it is bulky and inconvenient to carry because of its three-dimensional shape.

  This invention is made | formed in view of this point, and it aims at providing the absorbent article which has good local fit property and is not bulky to carry.

In order to achieve such an object, the present invention is grasped by the following configuration.
(1) One aspect of the present invention is as follows:
A liquid-permeable topsheet;
A liquid-impermeable backsheet;
Comprising an absorber disposed between the top sheet and the back sheet;
An absorbent article having a front part, an intermediate part, and a rear part in the longitudinal direction,
The front portion is provided with an odd number of chevron shapes at the front end so that the top and valley portions are alternately formed,
The middle part has a narrower width than the front part,
The rear part is wider than the middle part and narrower than the front part,
Provided is an absorbent article in which at least one embossed imaginary line extends in a substantially U shape from a valley portion to another valley portion via a front portion, an intermediate portion, and a rear portion.

(2) In the absorbent article as described in (1) above,
The embossing may be a continuous embossing at least in the rear part.

(3) In the absorbent article according to (1) or (2) above,
Furthermore, a width embossing that traverses in the width direction may be formed at or near the boundary between the front portion and the intermediate portion.

(4) In the absorbent article according to any one of (1) to (3) above,
The ratio (La / Lb / Lc) of the longitudinal length (La) of the front portion, the longitudinal length (Lb) of the intermediate portion and the longitudinal length (Lc) of the rear portion is 4/3/3. Or it may be 5/3/2.

(5) In the absorbent article according to any one of (1) to (4) above,
It may have a thickness of 4 mm or less.

(6) In the absorbent article according to any one of (1) to (5) above,
The front part has 3 or 5 mountain shapes,
The chevron provided at the center may have a wider width direction than the chevron provided at other than the center.

(7) In the absorbent article according to any one of (1) to (6) above,
The front part has 5 chevron shapes,
Two substantially U-shaped embosses may be formed.

  According to the present invention, it is possible to provide an absorbent article that has good local fit and is not bulky to carry.

(A) is a schematic block diagram of an absorbent article having three chevrons according to the present invention, and (b) is a schematic block diagram showing an absorbent article having five chevrons according to the present invention. It is XX sectional drawing in the absorptive article shown in Drawing 1 (a). It is an attachment figure to underwear of an absorptive article concerning the present invention. (A) is a perspective view showing a three-dimensional form of an absorbent article having three chevrons according to the present invention, and (b) is a three-dimensional form of an absorbent article having five chevrons according to the present invention. The perspective view shown, (c) is a perspective view showing another three-dimensional formation mode of the absorbent article having three chevrons according to the present invention, and (d) is the absorbent having five chevrons according to the present invention. It is a perspective view which shows another three-dimensional formation aspect of articles | goods. It is a rear view of the absorptive article concerning the present invention.

  In order to solve the above problems, a preferred embodiment (hereinafter referred to as “embodiment”) of the absorbent article of the present invention will be described in detail below with reference to the accompanying drawings. In the description of the embodiments, the same numbers are assigned to the same elements throughout. Moreover, among the terms of the present invention, the “longitudinal direction” refers to the up and down direction (direction along the long side of the absorbent article) in FIG. 1A, and the “width direction” refers to the left and right direction (perpendicular to the longitudinal direction). Direction).

  FIG. 1A is a schematic configuration diagram of an absorbent article having three chevron shapes, and FIG. 1B is a schematic configuration diagram showing an absorbent article having five chevron shapes. Moreover, FIG. 2 is XX sectional drawing in the absorbent article shown to Fig.1 (a). As shown in FIG. 2, the absorbent article 1 includes a liquid-permeable top sheet 11, an absorber 13, and a liquid-impermeable back sheet 12 in order from the side in contact with the skin. Moreover, the absorbent article 1 can include a liquid diffusable sheet 18 and an adhesive portion 20. The top sheet 11 and the back sheet 12 are laminated such that the absorber 13 is sandwiched between the top and bottom, and the periphery thereof is partially or entirely fixed by a hot melt adhesive (not shown).

  As shown in FIG. 1 (b), the length L in the longitudinal direction of the absorbent article 1 is preferably 250 mm or more and 400 mm or less, more preferably 300 mm or more and 400 mm or less, from the viewpoint of the balance between prevention of side leakage and fit. . Moreover, the discomfort which generate | occur | produces when a user wears by reducing the thickness of the absorbent article 1 to 4 mm or less can be reduced.

  The absorbent article 1 has a front part A, an intermediate part B, and a rear part C, and the side edges of the front part A, the intermediate part B, and the rear part C are connected by a curve that is concave inward. Yes. Here, the front part A means a part located on the abdomen side of the user and ahead of the intermediate part B when wearing the absorbent article 1. The rear part C means a part located on the back side of the user and behind the intermediate part B when the absorbent article 1 is worn.

  FIG. 3 is a view of the absorbent article according to the present invention attached to the underwear. The front part A is attached so as to be bent on the inner surface of the front part of the underwear, and the intermediate part B is located in the crotch part of the user. The rear part C is located behind the crotch part.

  The ratio (La / Lb / Lc) of the length (La) in the longitudinal direction of the front part A, the length (Lb) in the longitudinal direction of the intermediate part B and the length (Lc) in the longitudinal direction of the rear part C is fit. 4/3/3 to 5/3/2 is preferable from the viewpoint of safety and leakage prevention.

  The length Wa in the width direction of the front part A is preferably 100 mm or more and 300 mm or less, more preferably 150 mm or more and 240 mm or less from the viewpoint of widening the range that can be covered and improving the formability to the three-dimensional shape shown above. . In addition, the width Wb of the intermediate part B has a width narrower than the length Wa of the front part A in the width direction. From the viewpoint of attachment to underwear, the minimum width is 30 mm or more and 100 mm or less. Preferably, it is 50 mm or more and 80 mm or less. Further, the length Wc in the width direction of the rear portion C is wider than the length Wb in the width direction of the central portion B and narrower than the length Wa in the width direction of the front portion A. From the viewpoint of fit from the back of the thigh to the buttocks, the maximum width is preferably 70 mm to 120 mm, and more preferably 60 mm to 100 mm.

  The ratio (Wa / Wb / Wc) of the maximum width (Wa) of the front part A, the minimum width (Wb) of the intermediate part B and the maximum width (Wc) of the rear part C is to prevent side leakage and from the local area to the hip part. From the viewpoint of the fit property, (10-30) / (3-10) / (7-12) is preferable.

  The front portion A is provided with an odd number of mountain shapes 16 at the front end so that the top portions 14 and the valley portions 15 are alternately formed. 1 (a) and 1 (b), an imaginary line 171 to which at least one emboss is applied passes from the valley portion 15 through the front portion A, the intermediate portion B, and the rear portion C. Extending to another valley 15 in a substantially U-shape. As long as the substantially U-shaped emboss 17 passes through the front part A, the intermediate part B, and the rear part C, the end point may be anywhere in the region of the front part A. For example, as shown in FIG. Thus, when embossing the absorbent article 1, it is good also considering the front-end part of the absorber 13 as an end point from a viewpoint which prevents the drag between the top sheet 11 and the absorber 13, and tearing. Moreover, as shown in FIG.1 (b), it is good also considering the valley part 15 as an end point from a viewpoint of strengthening the bonding between the top sheet 11 and the absorber 13. FIG. Here, the shape of the substantially U-shaped emboss 17 refers to a U-shape or a shape similar to this, for example, a shape that is folded back into a curved surface like a C-shape, or a V-shape. Thus, a shape that folds linearly is also included. The substantially U-shaped emboss 17 can efficiently diffuse into the absorber 13 while guiding body fluid from the front part A to the rear part C.

  4A is a perspective view showing a three-dimensional form of the absorbent article 1 having three chevron 16, and FIG. 4B shows a three-dimensional form of the absorbent article 1 having five chevron 16. 4 (c) is a perspective view showing another three-dimensional form of the absorbent article having three chevron shapes, and FIG. 4 (d) is another view of the absorbent article having five chevron shapes. It is a perspective view which shows a solid formation aspect. As shown in FIG. 4A and FIG. 4B, the substantially U-shaped emboss 17 makes it easy to fold the absorbent article 1 and take a three-dimensional shape. You can make it easier to remember. And by taking this solid shape, the absorbent article 1 can prevent side leakage. On the other hand, as shown in FIGS. 4 (c) and 4 (d), the front portion A can be bent into a cup shape by bending the absorbent article 1 deeper along the substantially U-shaped emboss 17. This will prevent leakage. In particular, the absorbent article 1 is preferably used for men because it has a shape that wraps around the local area of men. Further, the absorbent article 1 is provided with at least two valley portions 15 in the front portion A, so that the material (top sheet 11, absorbent body 13, back sheet 12) at the time of bending is eliminated, and three-dimensional formation is achieved. This makes it easier to wear, reduces discomfort when worn, and improves fit.

  For example, as shown in FIG. 1A, when there are three mountain shapes, there are three top portions 14 and two valley portions 15, and one emboss 17 having a substantially U shape can be formed. it can. In addition, as shown in FIG. 1B, when there are five chevron shapes, there are five top portions 14 and four valley portions 15, and one or two substantially U-shaped embosses 17 are formed. can do. By forming two substantially U-shaped embosses 17, the three-dimensional formability and body fluid diffusibility of the front portion A can be improved. In the case where the number of the chevron 16 is five or more, a pair of support embosses that support three-dimensional formation may be provided in the vicinity of the valley portion 15 that does not include the substantially U-shaped emboss 17 along the longitudinal direction.

  As shown in FIG. 1 (b), when forming the front portion A into a three-dimensional shape, the width emboss 17w that crosses the width direction between the front portion A and the intermediate portion from the viewpoint of facilitating the wrapping of the local area. It can be formed at or near the boundary of the part B. Moreover, the width | variety embossing 17w can prevent the shift | offset | difference of the mounting position of the absorbent article 1, and can exhibit the absorption performance of the absorbent article 1 effectively by becoming a standard of the position mounted | worn with underwear. When packaging the absorbent article 1 individually, from the viewpoint of forming a crease, a width emboss 17w that traverses in the width direction can also be formed at or near the boundary between the intermediate portion B and the rear portion C (not shown). .)

  The shape of the emboss 17 is not particularly limited, such as a dot-shaped or broken-line embossed interval or a continuous one including a grid-like hatching. From the viewpoint of preventing leakage to the back side, at least the rear portion C may be a continuous emboss.

  When the front part A includes three or five chevron shapes 16, the chevron shape 16 provided at the center in the width direction is formed to have a width in the width direction wider than the chevron shape 16 provided at other than the center in the width direction. be able to. Here, as shown in FIG. 1 (b), the width W 16 of the chevron 16 is the longitudinal direction from the inflection point and valley 15 forming the chevron 16 in the chevron 16 at both ends in the width direction. The distance between the two points drawn in parallel to the width direction is shown as a vertical line, and in the mountain shape 16 other than both ends in the width direction, it is perpendicular to the longitudinal direction from the valleys 15 and 15 forming the mountain shape 16. The distance between the two points drawn by extending the line and parallel to the width direction is shown. Since the chevron 16 provided at the center has a wider width than the chevron 16 provided at other than the center, the chevron 16 provided at the center in the width direction firmly fixes the local area, and the chevron 16 provided at other than the center in the width direction. It will envelop the local area. In the case where the front portion A includes three chevron shapes 16, the ratio of the maximum width of the chevron shape 16 provided at the center other than the chevron shape 16 provided at the center and the chevron shape 16 provided at the center other than the side leakage prevention, 2: 6: 2 to 3: 4: 3 are preferred.

  Although there is no restriction | limiting in particular as the absorbent article 1 of this invention, For example, a disposable paper diaper, a sanitary napkin, a panty liner, a light incontinence pad, a liner etc. can be mention | raise | lifted.

  The top sheet 11 of the present embodiment only needs to have liquid permeability so that excrement such as urine can penetrate into the absorbent body 13. For example, a nonwoven fabric such as a thermal bond nonwoven fabric and a thermal bond / spun bond are laminated. It is formed using a material such as a composite nonwoven fabric, a foamed film such as an open polyethylene film, a polyethylene foam, a urethane foam, or a composite sheet obtained by laminating these. Further, when the absorbent article 1 is mounted, the absorbent body 13 in the vicinity of the front portion A is arranged to be inclined with respect to gravity, so that the body fluid runs on the surface of the top sheet 11 and is absorbed by the absorbent body 13. In some cases, leakage may occur. Therefore, the top sheet 11 is preferably a so-called mesh sheet having a large number of holes in the base material from the viewpoint of dryness and leakage prevention.

Furthermore, in order to reduce irritation to the skin, the top sheet 11 preferably contains a lotion, an antioxidant, an anti-inflammatory component, a pH adjuster, an antibacterial agent, a moisturizing agent and the like. Furthermore, from the viewpoint of strength and workability, the basis weight of the top sheet 11 is preferably 10 g / m ² or more and 50 g / m ² or less, more preferably 15 g / m ² or more and 30 g / m ² or less.

The back sheet 12 of the present embodiment may have a liquid impermeability so that the bodily fluid held by the absorbent body 13 does not ooze out or leak into the underwear, such as a nonwoven fabric, a resin film, or these. A material such as a laminated composite sheet is formed as a base material. Such a nonwoven fabric is not particularly limited in its production method, and examples thereof include spunbond and meltblown nonwoven fabrics, or composite nonwoven fabrics in which spunbond / meltblown, spunbond / meltblown / spunbond are laminated, and composite materials thereof. Examples of the resin film include polyester, polyvinyl alcohol, polyethylene, polypropylene, and a composite film of polyethylene and polypropylene. From the viewpoint of strength and workability, the basis weight of the back sheet 12 is preferably 15 g / m ² or more and 40 g / m ² or less. Further, it is preferable that the back sheet 12 has moisture permeability in order to prevent stuffiness at the time of wearing. In order to provide moisture permeability, for example, a filler is blended in the resin film of the base material, and the back sheet 12 is embossed. An example of the filler is calcium carbonate, and the processing method thereof can be a known method without limitation.

  FIG. 5 is a rear view of the absorbent article. The absorbent article 1 can be provided with the adhesive part 20 in the region of the non-skin contact surface of the back sheet 12 from the viewpoint of preventing slippage when the absorbent article 1 is attached to the underwear. The shape of the adhesive portion 20 can be selected without particular limitation, such as a substantially rectangular shape, a circular shape, or an oval shape. For example, as shown in FIG. 5, the shape may be within the range of the central portion in the width direction from the viewpoint of making the front portion A easily form a three-dimensional shape. As the pressure-sensitive adhesive forming the pressure-sensitive adhesive portion 20, a known material can be used without particular limitation. Furthermore, when the absorbent article 1 is individually packaged, a release paper for protecting the adhesive portion 20 can be provided.

  The absorbent body 13 of the present embodiment is preferably made of a base material and a super absorbent resin (SAP) from the viewpoint of absorbability. The substrate is not particularly limited as long as it has liquid absorbency, liquid conductivity, and adhesiveness to SAP, and examples thereof include fluff pulp and hydrophilic sheets. Examples of such fluff pulp include those obtained by defibrating wood pulp and synthetic fibers into cotton, and examples of the hydrophilic sheet include tissue, absorbent paper, and hydrophilic nonwoven fabric.

The absorber 13 is comprised by the sheet | seat form of single layer or multiple layers using said material. From the viewpoint of securing the amount of absorption, preferred is a fluff pulp web formed by mixing a hydrophilic fiber matrix of a fluff pulp web with SAP, or an SAP sheet obtained by applying SAP to a hydrophilic sheet. Further, from the viewpoint of preventing SAP leakage and stabilizing the shape of the absorbent body 13, it is preferable to wrap the absorbent body 13 in a hydrophilic carrier sheet such as tissue. From the viewpoint of the balance between the absorption rate of the substrate and the SAP, water retention, and liquid returnability, the basis weight of SAP in the absorbent body 13 is preferably 150 g / m ² or more and 500 g / m ² or less.

  There is no restriction | limiting in particular as a shape of the absorber 13, For example, the thing along the external shape of the absorbent article 1, a rectangular shape, an hourglass shape, I shape etc. can be mention | raise | lifted.

  The absorbent body 13 is preferably formed with a compressed groove (not shown) extending in the longitudinal direction along the longitudinal center of the absorbent body 13. By this compressed groove, the absorbent article 1 can be easily bent in the longitudinal direction, and a local fit feeling can be improved during wearing. Further, it is preferable to emboss the surface of the absorbent body 13 to control the diffusion of excrement such as urine and to easily deform the absorbent body 13 according to the body shape of the user.

In order to promote diffusion of body fluid to the upper surface of the absorbent body 13, a liquid diffusable sheet 18 can be provided between the top sheet 11 and the absorbent body 13. Examples of the liquid diffusive sheet 18 include an air-through nonwoven fabric, a point bond nonwoven fabric, and a spunbond nonwoven fabric. The thickness of the liquid diffusable sheet 18 is preferably 0.1 mm or more, and the basis weight thereof is preferably 15 g / m ² or more. If the thickness is less than 0.1 mm or the basis weight is less than 15 g / m ² , the liquid is not sufficiently diffused over the entire upper surface of the absorber 13, which is not preferable. The shape of the liquid diffusive sheet 18 is not particularly limited, but is preferably a shape that can completely cover the surface of the absorbent body 13 so that body fluid diffuses throughout the absorbent body 13.

  As mentioned above, although this invention was demonstrated using embodiment, it cannot be overemphasized that the technical scope of this invention is not limited to the range as described in the said embodiment. It will be apparent to those skilled in the art that various modifications or improvements can be made to the above embodiment. Further, it is apparent from the description of the scope of claims that the embodiment added with such changes or improvements can be included in the technical scope of the present invention.

DESCRIPTION OF SYMBOLS 1 Absorbent article 11 Top sheet 12 Back sheet 13 Absorber 14 Top part 15 Valley part 16 Mountain shape 17 U-shaped emboss 171 Virtual line 17w Width emboss 18 Liquid diffusive sheet 19 Inflection point 20 Adhesive part A Front part B Intermediate portion C Rear portion Wa Front portion width direction length Wb Intermediate portion width direction length Wc Rear portion width direction length W16 Mountain shape 16 width direction length L Longitudinal length La Longitudinal length Lb of the front part Longitudinal length Lc of the intermediate part Longitudinal length of the rear part

Claims (7)

A liquid-permeable topsheet;
A liquid-impermeable backsheet;
Comprising an absorbent body disposed between the top sheet and the back sheet;
An absorbent article having a front part, an intermediate part, and a rear part in the longitudinal direction,
The front part is provided with an odd number of chevron shapes at the front end so that the top and valley portions are alternately formed,
The intermediate portion has a narrower width than the front portion,
The rear portion is wider than the intermediate portion and narrower than the front portion,
An imaginary line on which at least one emboss is applied extends in a substantially U shape from the valley portion to another valley portion via the front portion, the intermediate portion, and the rear portion. Absorbent article.   The absorbent article according to claim 1, wherein the emboss is a continuous emboss at least in the rear portion.   Furthermore, the width | variety embossing crossed in the width direction is formed in the boundary of the said front part and the said intermediate part, or its vicinity, The absorbent article of Claim 1 or 2 characterized by the above-mentioned.   The ratio (La / Lb / Lc) of the longitudinal length (La) of the front portion, the longitudinal length (Lb) of the intermediate portion, and the longitudinal length (Lc) of the rear portion is 4 /. The absorbent article according to any one of claims 1 to 3, wherein the absorbent article is 3/3 to 5/3/2.   The absorbent article according to any one of claims 1 to 4, wherein the absorbent article has a thickness of 4 mm or less. The front portion includes three or five chevron shapes,
The absorbent article according to any one of claims 1 to 5, wherein the chevron provided at the center has a width in the width direction wider than the chevron provided at other than the center. The front portion includes five chevron shapes,
The absorbent article according to claim 1, wherein two substantially U-shaped embosses are formed.

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