JP5420943B2 - Absorbent articles - Google Patents

Description

  The present invention relates to an absorbent article such as a napkin, a panty liner, a cage sheet, and an incontinence pad that reduces a depressed mood during a period of menstruation or light incontinence.

  Conventionally, as an absorbent article N such as a sanitary napkin, a panty liner, a cage sheet, an incontinence pad, for example, as shown in FIG. 6, a back sheet 50 made of a polyethylene sheet or a polyethylene laminated nonwoven fabric, a nonwoven fabric or There is known one in which an absorbent body 52 made of cotton pulp or the like is interposed between a liquid-permeable surface sheet 51 made of a permeable plastic sheet or the like.

  In recent years, in the absorbent article N, not only the pursuit of functionality, but also the design has been devised to reduce the depressed mood during menstruation and light incontinence, and to camouflag menstrual blood etc. Has come to be made. For example, in Patent Document 1 below, a napkin body in which an absorbent body is provided between a liquid-permeable top sheet and a liquid-impermeable back sheet, and the napkin body is folded in a state in which the back sheet is outside and packaged. A packaging sanitary napkin comprising a packaged sanitary napkin has been proposed in which a pattern is provided on the back sheet. Moreover, in the following Patent Document 2, the wing peripheral portion of the wing napkin and the entire back surface portion are colored or patterned, and when the napkin is attached to the underwear, it is difficult to recognize the attachment of the napkin from the outside. A napkin has been proposed. Furthermore, in the following Patent Document 3, the body-contacting layer formed by a single material layer, the garment-contacting layer, the body-contacting layer, and the garment-contacting layer are disposed. An absorbent core having a core edge, the core edge defining a core region in the core edge, and the body contacting layer on a garment facing surface in the core region Light transmission having a printed graphic, wherein the body contacting layer is visible through the body contacting layer printed on the garment facing surface of the body contacting layer Absorbent articles having have been proposed.

JP 2003-199786 A Registered Utility Model Gazette No. 30212237 Japanese Patent No. 4195066

  The absorbent articles according to Patent Documents 1 to 3 are all designed with respect to the back side sheet so that the outer side of the back sheet, the top sheet, and the side nonwoven fabric can be seen through. With this, it is possible to camouflage menstrual blood, etc., make it difficult to recognize that you are wearing a napkin, and reduce the feeling of depression during the menstrual period. ing.

  However, body fluids such as menstrual blood and urine are actually absorbed by the absorber, and the wearer will see the absorbed body fluid directly at the time of replacement. Even if it is treated, the effect mentioned above is quite weak.

  Some wearers are accustomed to seeing colors such as menstrual blood, urine, and vaginal discharge for physical condition management, and it is necessary to make these body fluids visible directly. There is a case.

  Therefore, the main problem of the present invention is that the upper surface of the absorbent body is colored and designed to reduce the feeling of depression during menstruation and light incontinence, while menstrual blood, urine, etc. It is an object of the present invention to provide an absorbent article which can be used for the convenience of those who perform physical condition management with the color of the body fluid so that the body fluid can be visually recognized, and which can prevent the absorbed body fluid from returning.

In order to solve the above-mentioned problem, in the absorbent article in which an absorbent body is interposed between the liquid-permeable top sheet and the back sheet as the present invention according to claim 1,
The absorber has a two-layer structure of a lower layer absorber and an upper layer absorber, and the upper layer absorber has a smaller area than the lower layer absorber and is disposed at a site corresponding to the body fluid discharge part. ,
Between the lower layer absorber and the upper layer absorber, the hydrophilic non-woven fabric that is colored and / or designed so as to cover almost the entire surface of the lower layer absorber on the upper surface of the lower layer absorber and without design An absorbent article is provided in which a laminated sheet obtained by laminating a porous plastic sheet of a base material is disposed so that the hydrophilic nonwoven fabric is on the upper layer side .

In the present invention according to claim 1, the coloring and / or design is between the lower layer absorber and the upper layer absorber so as to cover almost the entire surface of the lower layer absorber on the upper surface of the lower layer absorber. A laminated sheet obtained by laminating an applied hydrophilic nonwoven fabric and a porous plastic sheet of a base without a design is disposed so that the hydrophilic nonwoven fabric is on the upper layer side . Therefore, the body fluid that permeates the laminated sheet and is absorbed by the lower layer absorbent body is concealed by a colored and / or designed hydrophilic nonwoven fabric , which reduces the feeling of depression during menstruation and light incontinence. can do. In addition, since the body fluid absorbed by the upper absorbent body can be seen directly, the physical condition can be managed by the color of the body fluid. Furthermore, the porous plastic can prevent the body fluid absorbed by the lower layer absorbent from returning.

Further, since a laminated sheet obtained by laminating a hydrophilic nonwoven fabric that has been colored and / or designed and a porous plastic sheet without a design is disposed such that the hydrophilic nonwoven fabric is on the upper layer side, the porous plastic The touch feeling on the surface is better than the sheet alone. In addition, the film-specific hardness can be reduced.

As the present invention according to claim 2 , in the laminated sheet obtained by laminating the hydrophilic nonwoven fabric with the coloring and / or design and the porous plastic sheet of the base without the design , 1 or 1 in the lower surface region of the upper absorbent body the absorbent article of claim 1 Symbol mounting a plurality of openings are formed is provided.

The present invention according to claim 2 is characterized in that in the “ laminated sheet obtained by laminating the hydrophilic nonwoven fabric with the coloring and / or the design and the porous plastic sheet of the base without the design” according to claim 1 , the upper layer absorption. One or a plurality of openings are formed in the lower surface region of the body. By this opening, the transfer of body fluid from the upper layer absorbent body to the lower layer absorbent body is performed quickly.

As this invention which concerns on Claim 3 , the said porous plastic sheet provides the absorptive article in any one of Claims 1-2 by which the deodorizer and / or the fragrance | flavor are mix | blended.

In the invention according to claim 3 , the odor of body fluid is suppressed by blending a deodorant and / or a fragrance with the porous plastic sheet.

  As described above in detail, according to the present invention, the upper surface of the absorbent body is colored and designed to camouflag the absorbed body fluid, thereby reducing the depressed mood during periods of menstruation and light incontinence. While camouflaging blood, urine, etc., it is possible to make it easier for those who are performing physical condition management with the color of the body fluid by making the absorbed body fluid visible. Furthermore, it is possible to prevent the absorbed body fluid from returning.

1 is a partially broken perspective view of an absorbent article 1 according to the present invention. It is the II-II arrow directional view of FIG. It is a top view (A) which shows an example of opening formation to porous plastic sheet 5. It is a schematic cross section which shows the modification of a layer structure. It is a schematic cross section of absorbent article 1 'according to the second embodiment. It is an expanded view of the conventional sanitary napkin N.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[First embodiment]
The absorbent article 1 is mainly used for applications such as panty liners, sanitary napkins, cage sheets, incontinence pads, etc., for example, as shown in FIG. Between the liquid-permeable surface sheet 3 (hereinafter also simply referred to as a surface sheet), an absorber 4 having a two-layer structure composed of a lower layer absorber 4A and an upper layer absorber 4B is interposed, and the lower layer absorber 4A. A porous plastic sheet 5 that is colored and / or designed so as to cover almost the entire surface of the lower layer absorber 4A is disposed between the upper layer absorber 4B and the upper layer absorber 4B. It has a structure. Around the absorber 4, the liquid-impervious back sheet 2 and the liquid-permeable top sheet 3 are bonded by an adhesive means such as a hot melt adhesive or heat seal. Each of the lower layer absorber 4A and the upper layer absorber 4B may be covered with crepe paper.

  Hereinafter, the absorbent article 1 will be described in detail.

  The liquid-impervious back sheet 2 is made of a sheet material having at least water shielding properties, such as polyethylene and polypropylene. In addition to this, a laminated nonwoven fabric obtained by laminating a nonwoven fabric on a polyethylene sheet or the like, and further a waterproof film interposed. After substantially ensuring liquid impermeability, a nonwoven fabric sheet (in this case, a waterproof film and a nonwoven fabric constitute a liquid impervious back sheet) or the like can be used. In recent years, those having moisture permeability tend to be suitably used from the viewpoint of preventing stuffiness. The water- and moisture-permeable sheet material is a microporous material obtained by melting and kneading an inorganic filler in an olefin-based resin such as polyethylene or polypropylene to form a sheet, and then stretching in a uniaxial or biaxial direction. A sheet is preferably used.

  As the surface sheet 3, a non-porous or perforated nonwoven fabric or a porous plastic sheet is used. The surface sheet suitably used for the sanitary napkin 1 is a porous plastic sheet between the absorbent bodies 4A and 4B. In view of the arrangement of 5, it is desirable to use a nonwoven fabric such as air-through or spunbond for the surface layer so as to soften the touch feeling.

  Examples of the material fibers constituting the non-woven fabric include synthetic fibers such as olefins such as polyethylene and polypropylene, polyesters and polyamides, recycled fibers such as rayon and cupra, and natural fibers such as cotton. In addition, composite fibers such as a core-sheath fiber, a side-by-side fiber, and a split fiber that have a fiber having a high melting point as a core and a fiber having a low melting point as a sheath can also be suitably used. As for the processing method, a nonwoven fabric obtained by an appropriate processing method such as an air-through method, a spunlace method, a spunbond method, a thermal bond method, a melt blown method, or a needle punch method can be used. Among these processing methods, the spunlace method is excellent in terms of flexibility and drapeability, and the air-through method and the thermal bond method are excellent in terms of being bulky and soft. Moreover, the nonwoven fabric which consists of synthetic fibers is used suitably at the point which is easy to give embossing.

The lower layer absorbent body 4A and the upper layer absorbent body 4B are composed of, for example, fluffy pulp and a water-absorbing polymer. The water-absorbing polymer is mixed in the pulp constituting the absorber, for example, as granular powder. Examples of the pulp include chemical fibers obtained from wood, cellulose fibers such as dissolving pulp, and artificial cellulose fibers such as rayon and acetate. It is preferably used in terms of price. As the absorbers 4A and 4B, a pulp sheet can be used in addition to the flap pulp. This pulp sheet is obtained by processing a pulp fiber mixed with a superabsorbent resin into a sheet shape in advance, a thickness of 1 to 3 mm, a composition of pulp fiber of 10 to 200 g / m ² , and a superabsorbent resin of 0 to 100 g / m. ^Two are preferably used.

  Examples of the superabsorbent resin include cross-linked polyacrylate, self-crosslinked polyacrylate, saponified acrylate-vinyl acetate copolymer cross-linked, isobutylene / maleic anhydride copolymer cross-linked, Examples include cross-linked polysulfonates, and partially cross-linked water-swellable polymers such as polyethylene oxide and polyacrylamide. Among these, those based on acrylic acid or acrylate that are excellent in water absorption and water absorption speed are preferred. In the production process of the highly water-absorbent resin having the water absorption performance, the water absorption force and the water absorption speed can be adjusted by adjusting the crosslinking density and the crosslinking density gradient. In addition, when the high water-absorbing resin content exceeds 50%, the entanglement between the pulp fibers is lost, the sheet strength is lowered, and tearing, cracking, and the like are likely to occur.

  The upper layer absorbent body 4B has a smaller area than the lower layer absorbent body 4A and is disposed at a site corresponding to the body fluid discharge portion. That is, in the plan view, the lower layer absorbent body 4A has a planar shape that forms the outer shape of the absorbent body, and the upper layer absorbent body 4B is disposed in a form that forms a middle-high portion at a site corresponding to the body fluid discharge portion. Temporarily, in this absorbent article 1, when the upper layer absorbent body 4B is only for visually recognizing body fluid for physical condition management, a thin and small sheet-shaped absorbent body may be used. These lower layer absorber 4A and upper layer absorber 4B are generally white.

  A porous plastic sheet that is colored and / or designed between the lower layer absorbent body 4A and the upper layer absorbent body 4B so as to cover almost the entire surface of the lower layer absorbent body 4A on the upper surface of the lower layer absorbent body 4A 5 is disposed. Arbitrary things, such as a character, a figure, a symbol, can be employ | adopted as said design, Preferably it is set as chromatic color or the combination of chromatic colors.

As a material for the porous plastic sheet 5, for example, an olefin resin such as polyethylene or polypropylene is preferably used, but a polyamide resin such as polyester or nylon, EVA, or the like can also be used. The diameter of the openings 5a, 5a ... of the porous plastic sheet 5 is 0.05 to 3.0 mm, preferably 0.1 to 2.0 mm, more preferably 0.5 to 1.5 mm, and the number of the openings Is about 100 to 500 / cm ² , preferably about 200 to 400 / cm ² . In order to form the openings 5a, the synthetic resin sheet is softened near the softening temperature and is positioned on the upper surface of the support having a large number of openings, and is sucked from below the support, There are a method of pressurizing air pressure from the upper surface of the sheet, a method of drawing a large number of slits in the synthetic resin sheet material, and then stretching and opening the sheet material, and it can be formed by an appropriate method.

Further, in the case of the porous plastic sheet 5, although depending on the diameter of the opening, there is a case where a phenomenon in which it is difficult to move from the opening to the lower layer absorbent body 4 </ b> A due to its hydrophobicity may be seen. It is desirable to apply a surfactant to the side with a basis weight of 1.20 g / m ² or more so that the body fluid can easily migrate from the opening 5a to the lower layer absorbent body 4A.

  In the porous plastic sheet 5, as shown in FIG. 3, in order to promote the movement from the upper layer absorber 4B to the lower layer absorber 4A, one or more in the lower surface region of the upper layer absorber 4B. It is desirable that an opening be formed. The example shown in FIG. 3 (A) is an example in which one large opening 5b is formed in the arrangement region line 7 of the upper-layer absorber 4B indicated by a chain line, and the example shown in FIG. In this example, four openings 5c, 5c,... Are formed in the arrangement region line 7 of the upper-layer absorber 4B.

  In the upper layer absorbent body 4B, in order to quickly move the body fluid to the lower layer absorbent body 4A side, an olefin resin such as polyethylene or polypropylene, a polyamide resin such as polyester or nylon, or a chemical fiber such as EVA resin is contained. You may do it. The chemical fiber content is preferably 10 to 70% by weight based on the total weight of the upper absorbent body 4B. Moreover, as shown in FIG. 4, a non-woven fabric (so-called second sheet) 8 may be disposed between the upper absorbent body 4 </ b> B and the top sheet 3. The second sheet 8 is preferably made of a hydrophilic non-woven fabric and is made of a non-woven fabric having a fineness and a basis weight higher than those of the top sheet 3 so that the body fluid on the top sheet 3 can be quickly sucked by the density difference.

[Second embodiment]
Next, the absorbent article 1 ′ according to the second embodiment will be described in detail based on FIG.

  In the first embodiment, the porous plastic sheet 5 that has been colored and / or designed is disposed on the upper surface of the lower layer absorbent body 4A. However, in the second embodiment, as shown in FIG. As shown in the figure, a hydrophilic nonwoven fabric 9 colored and / or designed and a porous plastic sheet (no design) 10 are arranged in a laminated state. In the illustrated example, the hydrophilic nonwoven fabric 9 is arranged on the upper layer side and the porous plastic sheet (no design: substrate) 10 is arranged on the lower layer side, but the reverse may be possible. However, in order to improve the feeling of touch on the top sheet 3, it is desirable to dispose the hydrophilic nonwoven fabric 9 on the upper layer side. As the hydrophilic non-woven fabric 9, a non-woven fabric using a regenerated fiber such as rayon or cupra, a natural fiber such as cotton, or a non-woven fabric made of synthetic fiber such as polyethylene or polypropylene such as olefin, polyester or polyamide, is hydrophilized. Use what you did.

  Since other modifications are the same as those in the first embodiment, description thereof will be omitted.

[Other examples]
(1) In the first and second embodiments, in order to reduce the odor of body fluid, a deodorant and / or a fragrance is blended (internally or externally) into the porous plastic sheets 5 and 10. May be. In this case, if a lavender pattern is applied, the scent may be lavender, or if it is a leaf pattern, a green tea deodorant component may be added.

  DESCRIPTION OF SYMBOLS 1 ... Absorbent article, 2 ... Impervious back sheet, 3 ... Liquid permeable surface sheet, 4A ... Lower layer absorber, 4B ... Upper layer absorber, 5 ... Porous plastic sheet (with design), 8 ... Second sheet, 9 ... hydrophilic non-woven fabric (with design), 10 ... porous plastic sheet (no design)

Claims (3)

In the absorbent article in which an absorbent body is interposed between the liquid-permeable top sheet and the back sheet,
The absorber has a two-layer structure of a lower layer absorber and an upper layer absorber, and the upper layer absorber has a smaller area than the lower layer absorber and is disposed at a site corresponding to the body fluid discharge part. ,
Between the lower layer absorber and the upper layer absorber, the hydrophilic non-woven fabric that is colored and / or designed so as to cover almost the entire surface of the lower layer absorber on the upper surface of the lower layer absorber and without design An absorbent article, characterized in that a laminated sheet obtained by laminating a porous plastic sheet as a base is disposed so that the hydrophilic nonwoven fabric is on the upper layer side . In the laminated sheet obtained by laminating the hydrophilic nonwoven fabric that has been colored and / or designed and the porous plastic sheet of the base without design , one or more openings are formed in the lower surface region of the upper absorbent body. the absorbent article of claim 1 Symbol placement. The porous plastic sheet, the absorbent article according to claim 1-2 or the deodorant and / or fragrance is blended.

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