TWI494091B - Absorbent items - Google Patents

Description

Absorbent article

The present invention relates to a functional absorbent body which is provided in a central portion of an absorbent article corresponding to a body fluid outflow from a user, absorbs body fluids from a user, and contains at least a functional material that provides an additional function. Absorbent items.

Conventionally, an absorbent article such as a sanitary napkin or a sanitary pad generally includes a liquid-permeable surface sheet provided on the user side, and a liquid-impermeable back sheet provided on a non-user side; Between the surface sheet and the inner sheet, the body absorbing sheet from the user's body fluid is absorbed.

Such an absorbent article not only has a water retaining function from a user's body fluid, but also requires an additional function such as a deodorizing function or an antibacterial function, an aromatic function, and a heat retaining function. For example, in order to impart a deodorizing function, an absorbent article having a functional absorbent body of a granular material in which a functional material such as a deodorant is wrapped with a pulp sheet is provided between the surface sheet and the main body absorbent sheet (for example, refer to the patent) Document 1).

The functional material of the powder and granules, generally black or brown, yellow and other colored granules, and by color, the user can identify the additional function of the product from the external color of the product. That is, the user can confirm which product is given an additional function by recognizing the color of the area of the powder or granule provided with the functional material.

[Patent Document 1] JP-A-2002-272769 (pages 2-3, 1 and 2)

However, the above conventional absorbent article has the following problems. That is, the body fluid from the user is absorbed by the functional absorbent body and the body absorbent sheet through the surface sheet, but by applying pressure (for example, body pressure) to the absorbent article, there is a functional material. The case where the body fluid mixed with the powder and granules leaks from the surface sheet. Specifically, when the body fluid absorbed by the functional absorbent body and the main body absorbent sheet adheres to the skin of the user, it is called so-called rewetting.

In particular, when the powder or granule of the functional material has a color, the surface sheet is dirty by the occurrence of rewetting, which may cause discomfort to the user.

Further, in order to suppress rewetting, it is considered to make the pulp sheet of the granular material encapsulating the functional material thick. However, when the pulp sheet becomes thick, the body fluid from the user becomes less likely to penetrate into the powder or granule of the functional material, so that the additional function is not easily exhibited.

Accordingly, an object of the present invention is to provide an absorbent article which can provide an additional function and suppress rewetting when a functional material having an additional function such as a deodorizing function or an antibacterial function is provided.

In order to solve the above problems, the present invention has the following features. First, a first feature of the present invention is a liquid permeable surface sheet (surface sheet 10) provided on the user side, and an inner sheet (inner sheet 20) disposed closer to the non-user side than the surface sheet; a central portion of the absorbent article corresponding to the body fluid outflow from the user, and located between the surface sheet and the inner sheet, and comprising a function of at least an additional functional functional material (for example, a Chinese herbal medicine) The absorbent article (for example, the absorbent article 1) of the absorbent article (the functional absorbent body 310) is provided to be provided on the user side more than the functional absorbent body than the functional absorbent body. Further, the user-side absorbent body (the user-side absorbent body 320) covering the functional absorbent body has a diffusibility of the body fluid of the user-side absorbent body more than that of the functional fluid of the functional absorbent body. small.

According to the present invention, it is possible to provide an absorbent article which can provide an additional function and suppress rewetting when a functional material having an additional function such as a deodorizing function or an antibacterial function is provided.

[Best form for carrying out the invention]

[First Embodiment]

Hereinafter, the absorbent article 1 according to the first embodiment of the present invention will be described with reference to the drawings. Specifically, it is directed to: (1) the structure of the absorbent article; (2) the structure of the absorbent body; (3) the method for producing the absorbent article; (4) the action/effect; and (5) the modified example.

In the following description of the drawings, the same or similar parts are denoted by the same or the like. However, the drawing is a pattern diagram, and it must be noted that the ratio of each size is different from the actual item.

Therefore, the specific dimensions and the like must be judged by referring to the following description. And of course, even if the drawings are between each other, the dimensional relationship or ratio of each other contains different parts.

(1) Composition of absorbent articles

First, the configuration of the absorbent article 1 of the first embodiment will be described with reference to the drawings. Fig. 1 is a development view (plan view) of the upper surface of the absorbent article 1 according to the first embodiment. Fig. 2 is an exploded perspective view showing the absorbent article 1 of the first embodiment. Further, the absorbent article 1 of the first embodiment is a sanitary pad.

As shown in FIG. 1 and FIG. 2, the absorbent article 1 is provided with at least a liquid-permeable longitudinally long surface sheet 10; a liquid-permeable or liquid-impermeable longitudinally-shaped inner sheet 20; and a surface sheet 10 and Between the inner sheets 20, the elongated absorbent body 30 from the user's body fluid is absorbed.

Here, the absorbent article 1 is provided with a plurality of embossings 60, 61, and 62 that are joined by the compressed surface sheet 10 and a part of the user-side absorber 320 constituting the absorber 30 to be described later (first Joint). Further, the surface sheet 10 is joined to the inner sheet 20 by a hot melt adhesive or the like.

The plurality of embossments 60 are formed of dots. The embossments 61 are arranged in a ring shape along the outer shape of the absorbent article 1. The plurality of embossments 62 are arranged inside the region surrounded by the embossing 61 along the longitudinal direction LD of the absorbent article 1.

The surface sheet 10 allows bodily fluids from the user to pass through the absorber 30. The surface sheet 10 is provided on the user side more than the inner sheet 20 and the absorber 30. The surface sheet 10 is larger than the absorber 30 and is configured to cover the absorber 30. As the surface sheet 10, a spunlace nonwoven fabric having a cotton staple fiber of 100% and a fiber length of 15 to 40 mm can be exemplified.

The inner sheet 20 is preferably such that the absorbent body 30 does not absorb the body fluids from the user. The inner sheet 20 is disposed on the user side more than the surface sheet 10 and the absorber 30. The inner sheet 20 is preferably a material having excellent water leakage resistance such as excretion or the like which does not allow the absorbent body 30 to be absorbed into the underwear or the like. For example, the inner sheet 20 is a polyethylene film of 23 g/m ² .

(2) Composition of the absorber

Next, the configuration of the absorber 30 of the present invention will be described with reference to the drawings. Fig. 3 is a cross-sectional view of the absorbent article 1 of the first embodiment (cross-sectional view taken along line A-A in Fig. 1).

As shown in FIG. 3, the absorber 30 is provided with at least the functional absorber 310 and the user side absorber 320.

(2-1) Composition of functional absorber

The functional absorbent body 310 is an additional function of absorbing body fluids from a user and providing a deodorizing function or an antibacterial function, an aromatic function, a heat retention function, and the like. The functional absorbent body 310 is disposed at a central portion corresponding to the outflow of bodily fluids from the user. That is, the central portion refers to a plan view of the absorbent article 1 (see FIG. 1), and a longitudinal center LD of the absorbent article 1 and a substantially center of the width direction WD.

The functional absorber 310 is a sheet-like shape in which the mixture 311 is covered with two sheets of the exterior sheet 312, that is, after the mixture 311 is sandwiched between the two sheets of the exterior sheet 312, pressure is applied and at least a part of the sheet is joined by compression. . For example, as the pressure treatment, a plurality of embossments 63 in a dot shape (see FIG. 2) can be cited.

The mixture 311 is composed of a Chinese medicinal material and an absorbent pulp made of at least one type of colored (brown) functional material.

The basis weight of the Chinese medicinal material is, for example, 10 to 60 g/m ² . The Chinese medicinal material is uniformly disposed (that is, dispersed in the same manner) within the range covered by the exterior sheet 312 by mixing with the absorbent pulp.

In addition to the water retention function of the body fluid from the user, the Chinese herbal medicine provides other additional functions (such as deodorizing or antibacterial function, aromatic function, heat preservation function). Further, the Chinese medicinal material is selected in accordance with the functions required for the functional absorbent body 310, and is also considered from the viewpoint of manufacturing engineering. For example, the powder distribution or average powder diameter of Chinese herbal medicines is considered. That is, the ratio of the Chinese medicinal material and the absorbent pulp takes into consideration the harmony of the absorbability or productivity of the functional absorbent body 310 and the appearance of the product.

The Chinese medicinal material is at least one of the genus Ai Ye or the fragrant aconite and the Chinese angelica. For example, in Chinese herbal medicines, 10g/m ^{2 is} used for each of Xiangfuzi, Angelica and wormwood. Chinese herbal medicines are ideal for those who are twilight or brown or yellow. Especially the color of tea brown is ideal.

Here, the efficacy of Ai Ye can be as follows: warm body, increase appetite, promote bile secretion, hemostasis, abdominal pain, abdominal pain, heartburn, diarrhea, nosebleeds, hematuria, sputum, and the like. The color of the leaves is generally green to brown.

The efficacy of fragrant aconite can be exemplified by: menstruation, blood purification, analgesia, as a woman's disease, chronic gastritis, duodenal ulcer, neuropathic gastritis as a menstrual disorder, physiological pain, menopausal disorder, etc. The color of the fragrant aconite is generally brown.

The efficacy of Angelica can be exemplified by poor blood color, coldness, blood circulation, blood, strong, and analgesics as a woman's disease. The color of angelica is generally brown.

The basis weight of the absorbent pulp is, for example, 50 to 90 g/m ² . The absorbent pulp can be exemplified by NBKP (conifer bleached kraft pulp).

The exterior sheet 312 is a mixture 311 formed by sandwiching a Chinese medicinal material and an absorbent pulp as described above. The exterior sheet 312 may be liquid permeable. As the exterior sheet 312, a thin paper can be exemplified. For example, the outer sheet 312 is 23 g/m ² .

(2-2) Composition of the user side absorber

The user-side absorbent body 320 is provided on the user side more than the functional absorbent body 310, that is, between the functional absorbent body 310 and the surface sheet 10. The user-side absorbent body 320 is joined to the surface sheet 10 by a plurality of embossments 60 in a dot shape. The user-side absorbent body 320 and the functional absorbent body 310 are joined by a hot melt adhesive or the like.

Here, the interval S1 between the plurality of embossments 60 is wider than the interval S2 between the plurality of embossments 63 after the pressure treatment of the functional absorbent body 310 (functional material and exterior sheet) is applied. . That is, the ratio of the surface area of the plurality of embossments 60 (first joint portions) to the surface area of the user-side absorber 320 is larger than the plurality of embossments 63 (the second compression portion) with respect to the surface area of the functional absorber 310. The ratio of surface area is still small.

The user-side absorbent body 320 is larger than the functional absorbent body 310 and covers the functional absorbent body 310. That is, the user side absorbent body 320 is larger than the surface area of the functional absorbent body 310. Further, it is preferable that the user-side absorbent body 320 has a higher density than the surface sheet 10.

The diffusibility of the body fluid of the user-side absorber 320 is smaller than the diffusibility of the body fluid of the functional absorber 310. In particular, it is preferable that the diffusibility of the body fluid of the user-side absorber 320 is smaller than 120% of the body fluid diffusibility of the functional absorber 310.

The water retention of the user-side absorber 320 is greater than the water retention of the functional absorber 310. In particular, the water retention of the user-side absorber 320 is preferably greater than 120% of the water retention of the functional absorber 310.

The thickness of the user side absorber 320 is 1.5 mm. The basis weight of the user side absorbent body 320 is 70 g/m ² . The user-side absorbent body 320 may, for example, be an air-laid pulp composed of 60% of the same pulp as the absorbent pulp; 30% of the PE/PET core-sheath structure fiber; and a vinyl acetate resin 10.

(3) Method of manufacturing an absorbent article

Next, a method of manufacturing the absorbent article 1 according to the first embodiment will be described with reference to the drawings. Fig. 4 is a view showing a method of manufacturing the absorbent article 1 of the first embodiment.

The method for producing the absorbent article 1 includes: a member forming process; a first joining process; a second joining process; a third joining process; and a fourth joining process.

(3-1) Forming of each component

The surface sheet 10 or the inner sheet 20 and the absorber 30 are formed in each member forming process. For example, when the functional absorber 310 is formed, the functional absorber 310 is formed by sandwiching the mixture 311 (Chinese herbal medicine and absorbent pulp) with two sheets of the exterior sheet 312. Further, in the state in which the functional absorbent body 310 is sandwiched by the exterior sheet 312, a predetermined pressure (so-called embossing 63) is applied and compressed, and the sheet is formed into a predetermined thickness. For example, the predetermined pressure is preferably 2.0 to 3.3 MPa.

(3-2) The first joint project

As shown in FIG. 4(a), in the first joining process, the surface sheet 10 and the user-side absorber 320 are joined by a plurality of dot-shaped embossments 60. Specifically, a part of the surface of the surface sheet 10 on the side of the user-side absorber 320 is joined to a part of the surface of the user-side absorber 320 on the side of the surface sheet 10 .

Further, the interval S1 between the bonding surface sheet 10 and the plurality of embossments 60 of the user-side absorber 320 is preferably wider than the interval S2 (see FIG. 2) between the plurality of embossments 63 described above. That is, the ratio of the surface area of the plurality of embossments 60 with respect to the surface area of the user-side absorber 320 is preferably smaller than the ratio of the surface area of the plurality of embossments 63 with respect to the surface area of the functional absorber 310.

(3-3) The second joint project

As shown in FIG. 4(b), in the second joining process, the inner sheet 20 and the functional absorber 310 are intermittently joined by a hot melt adhesive or the like. Specifically, a part of the surface of the inner sheet 20 on the side of the functional absorbent body 310 and a part of the surface of the functional absorbent body 310 (the outer sheet 312) on the side of the back sheet 20 are intermittently joined.

Further, the indirect property means that not all of the joined surfaces and the surfaces are joined, but are formed in a dot shape, a dotted line shape, a linear shape, a spiral shape, or the like, and the joint surface and the surface are provided with a region that is not joined.

(3-4) The third joint project

As shown in FIG. 4(c), in the third joining process, the functional absorbent body 310 and the user-side absorbent body 320 are intermittently joined by a hot melt adhesive or the like. Specifically, a part of the surface of the functional absorber 310 (outer sheet 312) on the side of the user-side absorber 320 is intermittently joined to a part of the surface of the user-side absorber 320 on the side of the functional absorber 310. .

(3-5) The fourth joint project

As shown in FIG. 4(d), in the fourth joining process, the surface sheet 10, the functional absorbent body 310, and the back sheet 20 are intermittently joined by a hot-melt adhesive or the like. Specifically, a part of the surface of the surface sheet 10 and the functional absorber 310 on the side of the back sheet 20 and a part of the surface of the back sheet 20 on the side of the sheet 10 are intermittently joined.

(4) Action / effect

According to the first embodiment, the functional absorbent body 310 is provided at a central portion of the absorbent article 1 corresponding to the body fluid outflow from the user. Thereby, the body fluid from the user is easily absorbed. Therefore, it is possible to surely perform an additional function such as a deodorizing function, an aromatic function, an antibacterial function, and a heat retention function.

The user-side absorbent body 320 is larger than the functional absorbent body 310 and covers the functional absorbent body 310. That is, the user-side absorber 320 has a surface area that absorbs body fluids that is wider than the functional absorber 310. Further, the diffusibility of the body fluid of the user-side absorber 320 is smaller than the diffusibility of the body fluid of the functional absorber 310. According to this, the user-side absorbent body 320 can absorb the body fluid in the functional absorbent body 310 while suppressing the diffusion of the body fluid on the user-side absorbent body 320. Therefore, it is possible to surely exhibit an additional function, and a region capable of absorbing body fluid (hereinafter referred to as an absorption possible region) remains on the user-side absorbent body 320 as compared with the functional absorbent body 310.

However, when the functional absorbent body 310 is saturated, the body fluid once absorbed in the functional absorbent body 310 returns from the functional absorbent body 310 to the side of the user-side absorbent body 320 (that is, liquid bleed occurs). However, even in the case where liquid back osmosis occurs, as described above, since the absorption possible area remains on the user side absorbent body 320, the body fluid after liquid back rewet can be absorbed by the user side absorbent body 320. Therefore, it is possible to suppress the re-wetting of the body fluid once absorbed in the functional absorbent body 310 to the skin of the user.

According to the first embodiment, it is preferable that the diffusibility of the body fluid of the user-side absorber 320 is smaller than 120% of the diffusivity of the body fluid of the functional absorber 310. Further, when the diffusibility of the body fluid of the user-side absorber 320 is greater than 120% of the diffusivity of the body fluid of the functional absorber 310, the body fluid from the user diffuses on the user-side absorber 320, and the body fluid Since the absorption of the wide area of the user-side absorbent body 320 is performed, the body fluid does not easily move to the functional absorbent body 310, and the additional function is not easily exhibited.

According to the first embodiment, the water retention of the body fluid of the user-side absorber 320 is larger than the water retention of the body fluid of the functional absorber 310. According to this, in the state where the user-side absorbent body 320 remains in a large absorption area which is not used for body fluid absorption, since the body fluid moves to the functional absorbent body 310, even if liquid back-infiltration occurs, the user side can be used. The absorbent body 320 does absorb the body fluid after the liquid is back oozing.

According to the first embodiment, it is preferable that the water retention capacity of the user-side absorber 320 is larger than the water retention of the functional absorber 310 by 120%. Further, the water retention capacity of the user-side absorbent body 320 is smaller than 120% of the water retention capacity of the functional absorbent body 310, and even if the liquid back-reacting occurs, the user-side absorbent body 320 may become less likely to absorb liquid back-flux. body fluid.

According to the first embodiment, the functional absorbent body 310 and the user-side absorbent body 320 are joined by a hot melt adhesive. When the diffusibility of the body fluid of the user-side absorbent body 320 is smaller than the diffusibility of the body fluid of the functional absorbent body 310, at least a part of the functional absorbent body 310 and the user-side absorbent body 320 are compressed ( When the embossing is joined, for example, the body fluid is easily collected to the portion to be compressed and joined, and when the liquid rewet occurs, the body fluid easily leaks from the portion to be compressed and joined to the surface sheet 10 side. However, the functional absorbent body 310 and the user-side absorbent body 320 are joined by the hot melt adhesive, so that the diffusibility of the body fluid of the user-side absorbent body 320 does not approach the body fluid of the functional absorbent body 310. The diffusibility, the diffusibility of the body fluid of the user-side absorber 320 can be maintained to be smaller than that of the body fluid of the functional absorber 310. Therefore, since the absorption possible area of the user-side absorbent body 320 remains, the body-side absorbent body 320 can absorb the liquid liquid after the liquid is rewet, even when liquid back-reaction occurs.

According to the first embodiment, the functional absorber 310 has a functional material and an absorbent pulp. Accordingly, it is easy to uniformly arrange functional materials (ie, Chinese herbal medicines). That is, the functional materials are equally dispersed. Therefore, the color tone of the functional absorbent body 310 is not biased, and the appearance of the absorbent article 1 is not damaged, and the functional absorbent body 310 as a whole can surely exhibit an additional function of providing a Chinese herbal medicine.

According to the first embodiment, the interval S1 between the plurality of embossments 60 of the joint surface sheet 10 and the user-side absorber 320 is wider than the interval S2 between the plurality of embossments 63 after the pressure treatment of the functional absorber 310 is applied. . That is, the ratio of the surface area of the plurality of embossments 60 relative to the surface area of the user-side absorber 320 is smaller than the ratio of the surface area of the plurality of embossments 63 relative to the surface area of the functional absorber 310. As a result, the thickness of the entire functional absorbent body 310 is reduced, and the density of the entire functional absorbent body 310 is increased. Therefore, the diffusibility of the body fluid of the functional absorber 310 is greater than the diffusivity of the body fluid of the user-side absorber 320.

For example, the same compression is applied to the entire functional absorbent body 310 by a smooth roller or the like, and the compression by the roller or the like having the dot-like convex portion increases the pressure applied to each point, so that the function is high. The absorbing body 310, that is, the bonding force between the mixture 311 and the exterior sheet 312 becomes high, and the movement of the functional material (that is, the Chinese medicinal material) can be restricted, and the functional materials can be further uniformly disposed. On the other hand, by making the diffusibility of the body fluid of the user-side absorber 320 smaller than the diffusibility of the body fluid of the functional absorber 310, it is possible to surely exhibit an additional function and to suppress rewetting.

(5) Change example

The absorbent article 1 according to the first embodiment described above may be modified as described below. Fig. 5 is a cross-sectional view showing the absorbent article 1A according to a modification. In the same manner as the absorbent article 1 of the above-described first embodiment, the same reference numerals will be given to the same portions, and the different portions will be mainly described.

In the absorbent article 1 according to the first embodiment described above, the absorbent body 30 has the functional absorbent body 310 and the user-side absorbent body 320. On the other hand, in the absorbent article 1A of the modified example, the absorbent body 30 has the non-user-side absorbent body 330 in addition to the functional absorbent body 310 and the user-side absorbent body 320.

Specifically, as shown in FIG. 5( a ), the non-user-side absorber 330 is a body fluid that is absorbed by the functional absorber 310 . The non-user-side absorber 330 is disposed on the non-user side of the functional absorbent body 310, that is, disposed between the inner sheet 20 and the functional absorbent body 310.

The non-user side absorber 330 is intermittently joined to the functional absorber 310 by a hot melt adhesive or the like. Further, the non-user side absorber 330 is intermittently joined to the inner sheet 20 by a hot melt adhesive or the like.

The non-user side absorbent body 330 is formed by a flow molding paper similar to the user side absorbent body 320 or a sheet formed of a wet pulp non-woven fabric or the like.

Air-formed pulp is made up of: NBKP (conifer bleached kraft pulp) in a weight ratio of 20-90%, PE/PP or PE/PET core-sheath fiber (or side-by-side fiber) 0-70%, adhesive resin/vinyl acetate resin Or 2 to 30% of a synthetic rubber such as a styrene-based thermoplastic elastomer (for example, SBS or SEBS). Further, a pulp sheet was formed on the non-user side absorbent body 330 using a gas flow having a basis weight of 40 g/m ² and a thickness of 0.7 mm. The thickness of the air-laid pulp sheet is preferably 0.2 mm to 2.0 mm, and particularly preferably 0.4 mm to 1.6 mm.

The weight ratio of the wet pulp non-woven NBKP pulp is 20 to 90%, the polyethylene short fiber SWP is 0 to 50%, and the short fiber (1.1 to 2.2 dtex fiber length is 3 to 10 mm) is 0 to 50%, paper The force enhancer (cationized starch, etc.) is 0.5 to 4%. Further, the wet pulp non-woven fabric has an overall basis weight of 20 to 120 g/m ² , particularly preferably 25 to 100 g/m ² .

According to the absorbent article 1A of the modified example, in addition to the functional absorbent body 310 and the user-side absorbent body 320, the absorbent article 1A has a non-user-side absorbent body 330, whereby the non-user-side absorbent body 330 can be more effectively absorbed. The body fluid after passing through the functional absorber 310 is passed.

Here, the non-user-side absorber 330 does not have to be intermittently joined to the functional absorber 310 by a hot-melt adhesive or the like, for example, as shown in FIG. 5(b), or by at least a part of compression. The plurality of embossments 65 that are joined are intermittently joined to the functional absorbent body 310.

According to this, since the non-user-side absorber 330 and the functional absorber 310 are joined by a plurality of embossments 65, the joint strength is increased as compared with the case where they are joined by a hot-melt adhesive or the like. The connectivity of the body fluid of the user-side absorber 320 to the non-user-side absorber 330 is improved (that is, the body fluid is easily moved to the non-user-side absorber 330), and the non-user-side absorber 330 can be more efficiently Absorb body fluids from the user.

[Second Embodiment]

Hereinafter, the absorbent article 100 according to the second embodiment of the present invention will be described with reference to the drawings. Specifically, the description will be given of (1) the configuration of the absorbent article, (2) the configuration of the absorbent body, (3) the method for producing the absorbent article, and (4) the action and effect. In the same portions as those of the absorbent article 1 of the above-described first embodiment, the same reference numerals will be given to the same portions, and the different portions will be mainly described.

(1) Composition of absorbent articles

First, the configuration of the absorbent article 100 according to the second embodiment of the present invention will be described with reference to the drawings. Fig. 6 is a development view (plan view) of the upper surface of the absorbent article 100 according to the second embodiment. Fig. 7 is an exploded perspective view showing the absorbent article 100 of the second embodiment. Further, the absorbent article 100 of the present embodiment is a sanitary napkin.

As shown in FIG. 6 and FIG. 7 , the absorbent article 100 includes a surface sheet 10, a surface sheet 10, and an absorber 30, and further includes side sheets 40 disposed on both sides of the side surface of the surface sheet 10.

Here, in the absorbent article 100, the absorption region 50 along the longitudinal direction LD is provided slightly in the center in the width direction WD of the absorbent article 100. The absorption region 50 is composed of the surface sheet 10 and the absorber 30. A plurality of embossments 66A and 66B joined by the compressed surface sheet 10 and a part of the functional absorber 310 and the non-user side absorber 330 are provided in the absorption region 50.

On both sides of the side portion of the absorbent article 100, wing portions 70L and 70R extending outward in the width direction WD are formed. The wings 70L, 70R are formed by the side sheets 40 and the inner sheet 20.

The surface sheet 10 can be exemplified by a fiber composed of a polyethylene/polypropylene core sheath structure (hereinafter PE/PP core sheath structure fiber) 70%; a core sheath structure made of polyethylene/polyethylene terephthalate A hot air non-woven fabric composed of 30% of the fibers (hereinafter, PE/PET core sheath structural fibers). For example, the surface sheet 10 is 30 g/m ² .

The side sheet 40 is connected to the surface sheet 10 outside the width direction WD of the surface sheet 10. Specifically, the side sheets 40 are formed at substantially equal intervals along the longitudinal direction LD, and a plurality of embossments 67 joined by compressing at least a part are joined to the surface sheet 10. The side sheet 40 is preferably a material having excellent water repellency.

(2) Composition of the absorber

Next, the configuration of the absorber 30 of the present invention will be described with reference to the drawings. Fig. 8 is a cross-sectional view (cross-sectional view taken along line B-B of Fig. 6) of the absorbent article 100 according to the second embodiment.

As shown in FIG. 8, the absorber 30 is provided with the functional absorber 310, the user side absorber 320, and the non-user side absorber 330.

(2-1) Functional absorber

In the functional absorbent body 310, as in the first embodiment, the mixture 311 is sandwiched between the two outer sheets 312, and pressure is applied to form a sheet. The basis weight of the exterior sheet 312 is, for example, 13 to 16 g/m ² .

(2-2) User side absorber

The user-side absorbent body 320 can be exemplified by: 80% of the same pulp as the absorbent pulp; 7 mm of the fiber length; 17% of the PE/PET core-sheath construction fiber having a fineness of 1.7 dtex; and crepe paper composed of 3% of the cationized starch. . For example, the user-side absorbent body 320 has a basis weight of 30 g/m ² .

(2-3) Non-user side absorber

The non-user side absorbent body 330 absorbs body fluid from the user and holds it (so-called body absorbent sheet). The non-user-side absorber 330 is disposed on the non-user side of the functional absorber 310 and the user-side absorber 320, that is, disposed between the back sheet 20 and the functional absorber 310. The non-user side absorbent body 330 is joined to the surface sheet 10 by a plurality of embossments 66A, 66B joined by at least a part of compression. Further, the non-user side absorber 330 is joined to the inner sheet 20 by a hot melt adhesive or the like.

The density of the non-user side absorber 330 is preferably 3.0 to 5.5 g/m ³ , particularly preferably 0.6 to 2.0 g/m ³ . The non-user side absorbent body 330 is a pulverized pulp 331 in which a high absorption polymer is mixed with a wrapping sheet 332.

The thickness of the pulverized pulp 331 is preferably 0.15 to 0.7 mm, particularly preferably 0.2 to 0.6 mm. The basis weight of the pulverized pulp 331 is 300 to 500 g/m ² in the arrangement area of the functional absorbent body 310. Further, the pulverized pulp 331 may be subjected to a collapse treatment or the like. The pulverized pulp 331 may be an air-laid pulp or a wet pulp non-woven fabric similar to the absorbent pulp.

The basis weight of the wrapping sheet 332 is, for example, 15 g/m ² . Further, the basis weight of the region other than the region in which the functional absorber 310 of the non-user-side absorber 330 is disposed is 180 to 250 g/m ² , and particularly preferably 190 to 210 g/m ² . For example, the wrapping sheet 332 may be a hot air non-woven fabric, a dot-bonded non-woven fabric, a thin paper or the like.

(3) Method of manufacturing an absorbent article

Next, a method of manufacturing the absorbent article 100 according to the second embodiment will be described with reference to the drawings. Fig. 9 is a view showing a method of manufacturing the absorbent article 100 according to the second embodiment.

The manufacturing method of the absorbent article 100 includes: a member forming process; a first joining process; a second joining process; a third joining process; a fourth joining process; a fifth joining process; and a sixth joining process.

(3-1) Forming of each component

The surface sheet 10 or the side sheet 40, the back sheet 20, and the absorber 30 are formed in each member forming process. For example, when the non-user-side absorber 330 is formed, the non-user-side absorber 330 is formed such that the wrapping sheet 332 wraps the pulverized pulp 331.

(3-2) The first joint project

As shown in FIG. 9(a), in the first joining process, the surface sheet 10 and the user-side absorber 320 are joined by a plurality of embossments 60 in a dot shape. Specifically, a part of the surface of the surface sheet 10 on the side of the user-side absorber 320 is joined to a part of the surface of the user-side absorber 320 on the side of the surface sheet 10 .

Further, the interval S1 between the bonding surface sheet 10 and the plurality of embossings 60 of the user-side absorber 320 is compared with the plurality of embossings after the pressure treatment of the functional absorber 310 (functional material and exterior sheet) The interval S2 of 63 (see Figure 7) is still large. That is, the ratio of the surface area of the plurality of embossments 60 to the surface area of the user-side absorber 320 is preferably smaller than the ratio of the surface area of the plurality of embossments 63 with respect to the surface area of the functional absorber 310.

(3-3) The second joint project

As shown in FIG. 9(b), in the second joining process, the surface sheet 10 and the side sheet 40 are joined by a plurality of embossments 67. Specifically, a part of the surface of the surface sheet 10 on the side of the side sheet 40 and a part of the surface of the side sheet 40 on the side of the surface sheet 10 are joined.

Further, the surface sheet 10 and the side sheet 40 do not have to be joined by a plurality of embossments 67, and may be intermittently joined by, for example, a hot-melt joint material.

(3-4) The third joint project

As shown in FIG. 9(c), in the third joining process, the functional absorbent body 310 and the non-user side absorbent body 330 are joined by a plurality of embossments 68. Specifically, a part of the surface of the functional absorbent body 310 (outer sheet 312) on the side of the non-user-side absorber 330 is joined to a part of the surface of the non-user-side absorber 330 on the side of the functional absorber 310.

Further, the functional absorbent body 310 and the non-user side absorbent body 330 do not have to be joined by a plurality of embossments 68, and may be intermittently joined by, for example, a hot melt adhesive.

(3-5) The fourth joint project

As shown in FIG. 9(d), in the fourth joining process, the functional absorbent body 310 and the user-side absorbent body 320 are joined by a hot melt adhesive or the like. Specifically, a part of the surface of the functional absorbent body 310 (outer sheet 312) on the side of the user-side absorbent body 320 is joined to a part of the surface of the user-side absorbent body 320 on the side of the functional absorbent body 310.

(3-6) The fifth joint project

As shown in Fig. 9(e), in the fifth joining process, the surface sheet 10 and the non-user side absorber 330 are joined by the above-described plurality of embossments 66A and 66B. Specifically, a part of the surface of the surface sheet 10 on the side of the non-user-side absorber 330 and the surface of the surface sheet 10 on the side of the non-user-side absorber 330 of the user-side absorber 320 and the user-side absorber 320 are joined. A part is joined. Further, a plurality of embossments 66A, 66B are formed at positions other than the arrangement area of the functional absorber 310.

(3-7) 6th joint project

As shown in Fig. 9 (f), in the sixth joining process, the side portion of the surface sheet 10 and the non-user side absorbent body 330 and the back sheet 20 are joined by a hot melt adhesive or the like. Specifically, a part of the surface of the surface sheet 10 and the non-user-side absorber 330 on the side of the back sheet 20 and a part of the surface of the surface sheet 10 of the back sheet 20 are joined.

(Effect)

According to the absorbent article 100 of the second embodiment, similarly to the action and effect of the first embodiment, when a functional material that provides an additional function such as a deodorizing function or an antibacterial function is provided, it is possible to surely exhibit an additional function and suppress Get wet again.

[Other embodiments]

As described above, the content of the present invention is disclosed by the embodiments of the present invention, and it should be understood that the present invention is not limited to the scope of the present invention. The practitioners will thus be able to clarify the modalities, embodiments and techniques of the various alternative embodiments.

For example, the embodiment of the present invention may have the following changes. Specifically, although the surface sheet 10 is a sheet larger than the absorber 30, the present invention is not limited thereto, and may of course be the same size as the user-side absorber 320.

Although the functional material is described as a Chinese medicinal material, it is not limited thereto, and the additional function is not particularly limited as long as it has a material (for example, a deodorizing function, an antibacterial function, an aromatic function, or a heat insulating function). For example, as a functional material, a material obtained by drying wormwood, motherwort, tea, star anise, perilla, pepper, turmeric, lavender, thyme, tea tree, aloe, or the like, or a natural plant may be mentioned. In addition, examples of the functional material include organic or inorganic compound particles having antibacterial properties such as benzalkonium chloride and cetylpyridinium chloride (CPC).

Although the functional absorber 310 is described as being formed by sandwiching the mixture 311 with the exterior sheet 312, the present invention is not limited thereto, and the exterior sheet 312 may be formed to surround the mixture 311. At this time, it is preferable that the end portions of the outer sheet 312 in the width direction WD are set to overlap each other on the non-user side absorber 330 side. Further, in the functional absorbent body 310, the mixed body 311 may be disposed on the outer sheet 312, and the outer sheet 312 may be covered. For example, the mixed body 311 may be disposed on the exterior sheet 312 in a strip shape or a dot shape, and the exterior sheet 312 may be covered. Further, the functional absorbent body 310 may of course be a sheet formed by saturating a predetermined sheet into a functional material (Chinese herbal medicine) and drying it.

Regarding the method for producing the absorbent articles 1 and 100, as long as the production of the absorbent articles 1 and 100 of the present invention is possible, the order of the absorbent articles 1 and 100 is not particularly limited.

The absorbent body 30 (particularly, the functional absorbent body 310 or the user-side absorbent body 320) is described as being provided in a sanitary pad or a sanitary napkin, but is not limited thereto, and is used for diapers for adults and children. It can be applied to a wide variety of items that absorb liquids. For example, the absorbent body 30 can of course also be provided on a cloth sanitary napkin.

Therefore, it is understood that the present invention naturally includes various embodiments and the like which are not described herein. Therefore, the scope of the technology of the present invention is limited to the specific matters of the invention as set forth in the appended claims.

[comparative assessment]

Hereinafter, in order to clarify the effects of the present invention, the test results performed using the absorbent articles of the following comparative examples and examples will be described. Specifically, it is explained for (1) diffusivity evaluation, (2) water retention evaluation, (3) liquid back-pressure evaluation, and (4) total evaluation.

Here, the configurations of the articles of the comparative examples 1 and 2 and the examples 1 and 2 are as shown in Table 1. Moreover, the invention is not limited by such examples.

(1) Diffusion assessment

The diffusion property evaluation was carried out under the conditions of Comparative Examples 1 and 2 and Examples 1 and 2 shown in Table 1, and 3 samples of 25 mm × 150 mm were prepared, and it was prescribed in accordance with JIS-L1906 "Test method for water absorption of fibrous products". The diffusibility of each absorbent article measured by the water absorption speed (Byreck method).

Specifically, as shown in Fig. 10, each sample was immersed in a petri dish filled with a liquid (so-called artificial urine). In addition, the liquid is formed by: tap water, physiological saline (0.9% NaCl), edible oil, and coloring agent (oil; oil red, water; edible cyan).

The liquid height H1 which rises in the longitudinal direction LD of each absorbent article shown in Fig. 10 (a) and the liquid height which rises to the width direction WD of each absorbent article shown in Fig. 10 (b) are measured for each absorbent article. H2. Further, the rising height of the liquid described above was measured every 10 seconds up to 60 seconds, and then measured every 30 seconds until 300 seconds.

As a result, as shown in Table 2, in the absorbent article of Examples 1 and 2, compared with the absorbent article of Comparative Example 1 in which only the functional absorbent was used, since the numerical value was small, the diffusibility was small. Further, the absorbent article of Comparative Example 2 was too diffuse as compared with other absorbent articles.

(2) Water retention assessment

The water retention evaluation was carried out under the conditions of Comparative Examples 1 and 2 and Examples 1 and 2 shown in Table 1, and each sample of 60 mm × 60 mm was prepared, and the weight of each sample was measured. Then, each sample was placed on a mesh-shaped copper mesh, and immersed in a liquid placed in a tray (so-called artificial urine) for 3 minutes. Pick up each sample of the copper mesh and gently remove the liquid from each sample and let stand for 5 minutes. Thereafter, the weight of the copper mesh and the sample, and the weight of the copper mesh were measured. Further, each sample was placed on a sample stage, and a weight of 840 g was placed and placed for 3 minutes. The weight of each sample before the test and the weight after the test were then compared.

As a result, as shown in Table 3, the absorbent article of Example 1 was superior to the absorbent articles of Comparative Examples 1 and 2 in that the weight of the absorbent body was heavy, so that the water retention property was excellent. Further, it is understood that the absorbent article of Example 2 is water repellent equivalent to Comparative Example 1 in which only the functional absorbent is used.

(3) Evaluation of liquid rewet

The wetness evaluation was carried out under the conditions of Comparative Example 2 and Example 1 shown in Table 1, and each sample was prepared by hot-melt bonding a functional absorbent body of 60 mm × 30 mm and a user-side absorbent body of 150 mm × 70 mm. As shown in Fig. 11, a liquid (so-called artificial blood (1.0 mm)) was dropped on the center of the user-side absorbent body, and left for 3 minutes. Then, the size of the liquid after diffusion (hereinafter referred to as the diffusion size) on the non-user side absorber and the user side absorber was measured from the side where the liquid was dropped. In addition, the liquid is formed from tap water and physiological saline (0.9% NaCl).

Thereafter, the filter paper was stacked on each sample, and pressurized with a copper scale (20 g/cm ² ) for 3 minutes (pressure). Then, the diffusion size of the non-user-side absorber and the user-side absorber after pressurization for 3 minutes was measured.

As a result, as shown in Table 4, before and after the application of the scale, in the absorbent article of Example 1, the individual diffusion sizes of the user-side absorbent body and the functional absorbent body did not change. On the other hand, in the absorbent article of Comparative Example 2, the diffusion size of the user-side absorbent body increased. Therefore, it is understood that the absorbent article of Example 1 has a smaller amount of liquid rewet from the functional absorbent body to the user-side absorbent body than the absorbent article of Comparative Example 2.

(4) Total assessment

As described above, in the absorbent articles of Examples 1 and 2, compared with the absorbent articles of Comparative Examples 1 and 2, the non-user-side absorbent body has a small diffusibility and a large water retention property, and it is understood that liquid back-flow is less likely to occur.

Further, since the absorbent article of Comparative Example 1 is not provided with the user-side absorbent body, even when liquid back-infiltration occurs, the liquid cannot be absorbed. Further, in the absorbent article of Comparative Example 2, although the diffusibility is small, since the water retention property is also small, even when the liquid rewet occurs, it is understood that the absorbent on the user side cannot absorb the liquid.

1, 1A, 100. . . Absorbent article

10. . . Surface sheet

20. . . Inside sheet

30. . . Absorber

40. . . Side sheet

50. . . Absorption area

60 to 63, 65 to 68. . . Embossing

70L, 70R. . . Wing

310. . . Functional absorber

311. . . Mixture

312. . . Outer sheet

320. . . User side absorber

330. . . Non-user side absorber

331. . . Crushing pulp

332. . . Wrap sheet

Fig. 1 is a developed top view (plan view) of the absorbent article 1 according to the first embodiment.

Fig. 2 is an exploded perspective view showing the absorbent article 1 of the first embodiment.

Fig. 3 is a cross-sectional view of the absorbent article 1 of the first embodiment (a cross-sectional view of Fig. 1A-A).

Fig. 4 is a view showing a method of manufacturing the absorbent article 1 of the first embodiment.

Fig. 5 is a cross-sectional view showing an absorbent article 1A according to a modification.

Fig. 6 is a development view (plan view) of the upper surface of the absorbent article 100 according to the second embodiment.

Fig. 7 is an exploded perspective view showing the absorbent article 100 of the second embodiment.

Fig. 8 is a cross-sectional view (cross-sectional view of Fig. 6B-B) showing the absorbent article 100 of the second embodiment.

Fig. 9 is a view showing a method of manufacturing the absorbent article 100 according to the second embodiment.

[Fig. 10] A diagram for explaining the water retention evaluation in the comparative evaluation.

[Fig. 11] In the comparative evaluation, a map for rewetting evaluation will be described.

10. . . Surface sheet

30. . . Absorber

320. . . User side absorber

310. . . Functional absorber

63. . . Embossing

S2. . . interval

20. . . Inside sheet

Claims (8)

An absorbent article comprising: a liquid permeable surface sheet disposed on a user side; an inner sheet disposed on the non-user side than the surface sheet; and a body fluid outflow corresponding to the user from the user a central portion of the absorbent article, and an absorbent article positioned between the aforementioned surface sheet and the inner sheet and comprising at least a functional absorbent functional material providing an additional function, characterized in that it is provided in a ratio The functional absorbent body is further located on the user side and larger than the functional absorbent body, and covers the user-side absorbent body of the functional absorbent body, and the diffusing property of the body fluid of the user-side absorbent body is The surface liquid sheet and the user-side absorber are joined by a plurality of first joint portions that are joined by compression at least a part of the functional absorbent body, and the functional absorbent body is bonded to the functional absorbent body. a plurality of second compression portions joined by compressing at least a portion, and the interval between the first joint portions is a ratio of Compressing the second portion is wider spaced from each other, the additional function, a deodorizing function, antibacterial function, insulation function or an aromatic function. The absorbent article according to claim 1, wherein the functional absorbent body is coated with the functional material after the outer sheet is coated A sheet is applied by applying pressure and compressing at least a portion. The absorbent article according to claim 1 or 2, wherein the water retention capacity of the user-side absorbent body is larger than the water retention capacity of the functional absorbent body. The absorbent article according to claim 1 or 2, further comprising: a non-user side provided on the functional absorbent body, and absorbing non-use of the body fluid from the functional absorbent body Side absorber. The absorbent article according to the first or second aspect of the invention, wherein the functional absorbent body and the user-side absorbent body are joined by a hot melt adhesive. The absorbent article according to the first or second aspect of the invention, wherein the functional absorbent body comprises the functional material and the absorbent pulp. The absorbent article according to the first or second aspect of the invention, wherein at least one of the leaves containing the crude drug, the scented sage, or the angelica is used as the functional material. For example, in the absorbent article according to the first or second aspect of the patent application, a material obtained by drying wormwood, motherwort, tea, star anise, perilla, chili, turmeric, lavender, thyme, tea tree, aloe vera, and natural plants is used. Or an organic or inorganic compound particle having antibacterial properties as the functional material.