JP3968204B2 - Body fluid absorbing articles - Google Patents

Description

[0001]
[Field of the Invention]
The present invention relates to a bodily fluid absorbing article such as a sanitary product, an incontinence sheet, and a disposable diaper, and more particularly to a bodily fluid absorbing article that eliminates odor of bodily fluid and prevents stuffiness during use.
[0002]
[Prior art]
Conventionally, as an article that absorbs bodily fluids such as menstrual blood, urine and the like, sanitary napkins in which absorbent bodies such as pulverized pulp are encapsulated between a body sheet-permeable surface sheet and a body fluid-impermeable back sheet, incontinence Body fluid absorbing articles such as sheets, disposable diapers, and cage sheets are known. As problems at the time of using such an article for absorbing body fluid, leakage of body fluid such as menstrual blood, generation of odor and stuffiness have been pointed out. The problem of leakage of body fluid has been improved to a nearly satisfactory state by proposals regarding the structure, material, etc. of the article. In addition, stuffiness during use can be solved by making the backsheet breathable, but the breathable backsheet is a film or non-woven fabric in which fine holes are formed that are impermeable to water but permeable to water vapor. Since it is comprised, when breathability is provided, odor will pass with water vapor | steam, Therefore It was difficult to make breathability provision and odor prevention compatible. In particular, in the case of a physiological odor, the user (female) has a particularly strong disgust with respect to the odor leaking to the outside, and therefore it has been difficult to impart breathability for the purpose of preventing stuffiness.
[0003]
[Problems to be solved by the invention]
This invention makes it a subject to provide the article | item for body fluid absorption which enabled it to make air permeability provision and the deodorizing effect for preventing stuffiness compatible.
[0004]
[Means for Solving the Problems]
In order to solve the above problems, the present invention adopts a body fluid absorbing article in which an absorbent body is disposed between a top sheet and a back sheet, wherein the back sheet includes calcium carbonate, ferrous sulfide, zinc white. An article for absorbing body fluid, comprising a breathable film obtained by mixing at least one deodorant and a non-woven fabric or paper blended with acrylic acid-containing fibers.
[0009]
The acrylic acid-containing fiber is a modified cellulose obtained by copolymerizing methacrylic acid on a cellulose fiber.
[0010]
The acrylic acid-containing fiber is a modified acrylic fiber into which a carboxyl group obtained by modifying a part of the acrylic fiber is introduced.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Preferred embodiments of the present invention will be described in detail below. The embodiments described below are directed to sanitary napkins, but are not limited to sanitary napkins, and are similar to various articles for absorbing other body fluids such as disposable diapers, incontinence sheets, and textile sheets. It can be applied to. The sanitary napkin includes a surface sheet that can permeate bodily fluids, a back sheet that is impermeable to bodily fluids that blocks permeation of bodily fluids, and an absorbent body that is included between the two sheets, and has a conventionally known structure. Yes. As the surface sheet, the back sheet, and the absorbent body, various materials, shapes, and structures conventionally used for this kind of article can be used, and are not particularly limited. The absorber is generally made of crushed pulp, but may be a mixture of body fluid-absorbing polymer particles.
[0012]
Since the surface sheet is in direct contact with the skin of the user, it is preferably formed of a surface material made of a skin-friendly resin film or non-woven fabric, which will be described later. However, the surface sheet is not limited to this. All surface materials used for articles for use can be used. As a skin-friendly resin film, it consists of a single-layer or double-layer structure containing an additive selected from cosmetic raw materials, and many small holes are formed to transfer body fluid from the surface side to the absorber side. Those having a perforated film structure are preferred. The single layer film resin is preferably polyethylene from the viewpoint of moldability to film, mechanical strength, flexibility, etc. In the case of two layers, the skin side film layer is made of polyethylene, and the absorber side film layer is made of polyethylene. A mixture of polyethylene and ethylene vinyl acetate copolymer is most suitable. In a film having a two-layer structure, an additive is blended in a film layer located on the skin side. The compounding of the ethylene vinyl acetate copolymer provides flexibility to the film and improves heat sealability and enables heat sealing at a low temperature. It becomes possible to prevent the influence.
[0013]
The additive is added to the resin film by means of kneading. In the case of a perforated film, when the hole diameter is small, it is difficult to smoothly transfer the liquid. Therefore, it is preferable to improve the transferability by adding a hydrophilic agent. Examples of the hydrophilic agent to be added include glycerin, glycerin fatty acid ester, lipophilic glyceryl monooleate, lipophilic glyceryl monostearate, polyethylene glycol, polyoxyethylene lauryl ether, sorbitan monooleate, sorbitan monostearate, monolauric acid Examples include polyethylene glycol. The nonwoven fabric is made of polyethylene, polypropylene or a polyethylene / polypropylene composite, and an additive is applied to the surface of the fiber by means of coating.
[0014]
The additive is preferably a compounding ingredient blended into cosmetics as a cosmetic raw material, particularly as a skin care material. As such compounding agents, macadamian nut oil cholesteryl derivatives, macadamian nut oil fatty acid phytosteryl, di (cholesteryl, octyldodecyl) N-lauroyl-L-glutamate and other moisturizers, calcium carbonate, zinc oxide and other powders Is mentioned. Furthermore, raw materials such as aloe extract, mugwort extract, chitosan, and silk powder can be used. Macadamian nut oil cholesteryl derivatives, macadamia nut oil fatty acid phytosteryl, di (cholesteryl, octyldodecyl) N-lauroyl-L-glutamate and other moisturizers, calcium carbonate, zinc oxide and other powders are heat resistant. In particular, it is suitable as an additive for resin films extruded at a high temperature of about 230 ° C., and powders such as zinc oxide and calcium carbonate are particularly excellent.
[0015]
The present invention is characterized in that a film, nonwoven fabric, or paper having air permeability and deodorizing effect is used as a back sheet. A film suitable as a back sheet is a film made by mixing and blending a large amount of calcium carbonate, ferrous sulfide, zinc white into a polyolefin such as polyethylene, and stretching the film creates voids at the interface between the polyolefin and the powder. What was made is preferable. Such a film has a function of not allowing water to pass through but allowing water vapor to pass therethrough, and has air permeability for preventing stuffiness required for a sanitary napkin, and a deodorizing function is added by a blended deodorant. The blending amount of the deodorant is 1 to 60% by weight, more preferably 40 to 50% by weight based on the film. Calcium carbonate has a high deodorizing effect on isovaleric acid, ferrous sulfide has an effect on trimethylamine, and zinc white has a deodorizing effect on isovaleric acid and ethyl mercaptan. Therefore, these deodorants may be blended individually, but by blending three types of deodorizers together, they will exert a deodorizing effect on isovaleric acid, ethyl mercaptan and trimethylamine. It is possible to substantially deodorize all odors generated during use of the sanitary napkin.
[0016]
FIG. 1 shows an example of a sanitary napkin using a back sheet made of a polyethylene film in which the above three kinds of deodorants are combined. In FIG. 1, (1) is a surface sheet, (2) is an absorbent body mainly made of crushed pulp, and (3) is arranged on the upper part of the absorbent body (2) so that the central part of the sanitary napkin has a medium-high structure. The second absorbent body (4) is a back sheet, and an absorbent paper (5) is disposed between the absorbent body (2) (3) and the top sheet (1) and back sheet (4). The
[0017]
The backsheet was a laminated nonwoven fabric or laminated paper in which a non-woven fabric or paper blended with acrylic acid-containing fibers was laminated on a breathable film blended with calcium carbonate instead of the polyolefin film blended with the deodorant. May be. A film having air permeability is a film in which calcium carbonate is blended with a polyolefin such as polyethylene to form a film and stretched to form a void at the interface between the polyolefin and the powder. As the acrylic acid-containing fiber, modified cellulose obtained by copolymerizing methacrylic acid on cellulose fiber, or modified acrylic fiber obtained by modifying a part of the acrylic fiber and introducing a carboxyl group is preferable. Such a laminated nonwoven fabric or laminated paper has air permeability that does not allow water to pass but allows water vapor to pass, and also has a deodorizing effect on alkaline odor (trimethylamine) caused by calcium carbonate blended in the film, and an acidic odor caused by modified acrylic fiber or modified cellulose. (Isovaleric acid)) has a deodorizing effect, and by combining materials having different odor spectra, it is possible to exert more various deodorizing effects, which is suitable as a sanitary napkin backsheet. Material.
[0018]
FIG. 2 shows an example of a sanitary napkin using a laminated nonwoven fabric as a back sheet. In the figure, (1) is a surface sheet, (2) and (3) are absorbent bodies, and (5) is an absorbent paper. The napkin for use has a medium-high structure as in FIG. FIG. 3 shows an example of a sanitary napkin using laminated paper as a back sheet. (1) is a surface sheet, (2) is an absorber, (5) is an absorbent paper, and the back sheet (4) Laminated paper blended with modified cellulose is used, and the absorbent body (2) is made of crushed pulp blended with the polymer absorbent body (6), and is different from FIGS. Is different.
[0019]
【The invention's effect】
According to this invention, since the back sheet has air permeability and a deodorizing effect, it is possible to prevent odor from leaking outside while effectively preventing stuffiness during use, such as a sanitary napkin An extremely excellent article for absorbing body fluid can be provided.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing one embodiment of the present invention. FIG. 2 is a cross-sectional view showing another embodiment. FIG. 3 is a cross-sectional view showing still another embodiment.
(1) Surface sheet
(2) Absorber
(3) Second absorber
(4) Back sheet
(5) Absorbent paper
(6) Polymer absorber

Claims (3)

In an article for absorbing body fluid in which an absorbent body is disposed between a top sheet and a back sheet, the back sheet is stretched by mixing at least one deodorant of calcium carbonate, ferrous sulfide, and zinc white. An article for absorbing body fluid, comprising a laminate of a nonwoven fabric or paper blended with acrylic acid-containing fibers on a film. 2. The article for absorbing body fluid according to claim 1, wherein the acrylic acid-containing fiber is a modified cellulose obtained by copolymerizing methacrylic acid with a cellulose fiber. 2. The body fluid absorbing article according to claim 1, wherein the acrylic acid-containing fiber is a modified acrylic fiber into which a carboxyl group obtained by modifying a part of the acrylic fiber is introduced.

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