JPH0738866B2 - Absorber surface sheet and absorbent product - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Industrial field of application The present invention relates to a disposable diaper, a napkin, a paper towel, a paper rag, a paper waste, a puff, a perfume mat, a paper mask, a water absorbing mat for inserting a tray (food container), The present invention relates to an absorbent product such as a water absorption mat for replenishing water and chemicals.

○ Prior Art In Japanese Utility Model Publication No. Sho 62-20194 "Sanitary surface material", a cotton body containing heat-sealing fibers is covered with a nonwoven fabric on both sides to form a three-layer structure,
Disclosed is an absorber in which a large number of through holes are formed by heating and pressing a concave roller and a convex roller (heat roller).

[Problems to be Solved by the Invention] In the above-mentioned known technique, a plurality of recesses are formed to improve the dryness (drying property) of the absorber surface and to improve the feel of the skin, but a through hole is formed. Therefore, there is a problem that absorption of body fluid or the like is concentrated in the vicinity of the through hole and the body fluid or the like is not diffused into the absorber as a whole.

Also, since the absorber is exposed due to the presence of the through holes,
There is a problem that body fluid or the like flows back and leaks to the surface of the absorber, giving a feeling of wetting to the user.

Therefore, the present invention, in the absorbent surface sheet having a porous surface by forming a large number of recesses on the surface of the absorbent surface sheet,
To increase the diffusivity of body fluid and the like to the absorber on the back surface side of the absorbent body surface sheet, to uniformly guide the body fluid and the like to the absorbent body, and to prevent backflow of body fluid and the like from the absorbent body to the absorbent body surface sheet. It is an issue.

○ Means for Solving the Problem The first invention of the present application is a three-layer structure in which a heat-bonding nonwoven fabric is arranged on both sides of a defibrating pulp containing heat-bonding fibers and the heat-bonding defibrating pulp is covered with the nonwoven fabric. As a structure, a large number of recesses are formed on the surface by heat embossing from above the nonwoven fabric, the bottom surface of the recesses is located in the defibrating pulp layer, and between the bottom surface of the recess and the nonwoven fabric below. Presence of defibrated pulp.

The second invention of the present application is, regarding the recess in the first invention, by bonding the upper nonwoven fabric and the lower nonwoven fabric at the bottom surface of the recess, there is no defibrated pulp between the upper nonwoven fabric and the lower nonwoven fabric. And

The third invention of the present application constitutes an absorbent product by stacking the absorbent top sheet of the first invention, an absorbent pad, and a waterproof backsheet.

A fourth invention of the present application constitutes an absorbent product by laminating the absorbent top sheet of the second invention, an absorbent pad, and a waterproof backsheet.

Examples Examples will be described below based on the examples shown in the drawings.

FIG. 1 and FIG. 2 show an absorbent body surface sheet A1 according to the first invention of the present application, in which a heat-fusible pulp 2 which has been defibrated
Is wrapped with a heat-fusible nonwoven fabric 1 from above and a heat-fusible nonwoven fabric 3 from below, and a large number of recesses 4 are formed on the surface side to form a porous surface C.

The non-woven fabrics 1 and 3 can be heat-sealed (heat-bonded) such as a heat fusion type, an adhesive type, an adhesive type (containing a hot melt adhesive), a spunbond method, and a direct spinning method. The structure includes heat-sealing fibers (in the embodiment, the heat-sealing fibers are 15% to 50%).

The recess 4 is a heat embossing device (a heating means is provided inside the embossing roller having a large number of convex patterns formed on its peripheral surface) from the non-woven fabric side with respect to the above heat-fusible pulp 2 and heat-bonding non-woven fabric 1. A heat-fusing stamping device), which is formed by being pressed by a pressing die while being heated, and is formed by fusing fusible fibers in pulp 2 as shown in FIG.
The non-woven fabric 1 and the pulp 2 are fixed and integrated by the thermal adhesiveness between the 2a and the non-woven fabric 1. Further, the nonwoven fabric 3 on the back side is also fused and integrated by the thermal adhesiveness of the fused pulp 2a and the nonwoven fabric 3.

FIG. 3 shows an embodiment of the second invention of the present application, in which the depth of the recess 4 is increased and the non-woven fabric 1 on the front surface side and the non-woven fabric 3 on the back surface side are brought closer to each other through the molten pulp 2a. Glued,
The strength of the absorber topsheet A1 is increased.

The front side nonwoven fabric 1 and the back side nonwoven fabric 3 may be made of the same material or different materials. In particular,
The non-woven fabric 3 on the back side does not cause a skin feel problem unlike the non-woven fabric 1 on the front side, so a thick one is used to enhance the absorbency, or a material with high burst strength including materials such as pulp and chips. It is possible to select arbitrary material characteristics such as

FIGS. 4 and 5 show the case where the third invention of the present application is applied to a napkin, and the absorbent body topsheet A1 of the first invention of the present application is shown.
The absorbent pad 7 is wrapped between the waterproof backsheet 6 and the waterproof backsheet 6, and the absorbent napkin is the absorbent topsheet of the first invention of the present application in a known napkin. .

In FIG. 4, 8 indicates an end heat seal portion,
In the present invention, the upper absorbent sheet and the lower waterproof back sheet (PE sheet) can be heat-bonded by the fused pulp 2a even with the pulp 2 interposed.

As shown in FIG. 6, the absorbent top sheet of the present invention has a structure in which body fluids and the like are guided in the direction of the arrow due to the presence of the recesses, the diffusivity is enhanced, and the back surface side non-woven fabric 3 quickly absorbs the absorbent pad. As a result, the drying property of the surface of the absorbent body surface sheet is improved, and the napkin, disposable diaper and the like have a good feeling of use. Further, since the bottom surface of the recess does not penetrate, body fluid or the like does not flow back to the surface side of the absorbent body surface sheet.

Effect of the Invention The absorbent top sheet of the first invention of the present application has absorptive and diffusive properties due to the formation of the porous surface by a large number of recesses and the three-layer structure of the non-woven fabric on the front side and the non-woven fabric on the back side. It is possible to improve the dryness of the surface of the absorbent top sheet by increasing the absorption rate and also because the pulp layer has an absorbing power, it is possible to use only the surface sheet as an absorbent product for absorbing various chemicals and liquids. Although it is possible, since the bottom surface of the recess does not penetrate the nonwoven fabric on the back surface side, it does not flow out directly from the recess to the back surface side. Since the peripheral surface of the formed recess is porous and has good permeability and evenly penetrates into the defibrated pulp, body fluid does not concentrate near the recess and absorbs and diffuses body fluid. However, due to the recesses that penetrate the bottom surface, Compared with a well-known three-layer structure absorbent surface sheet having a pore surface, the absorbent body has good absorbency of body fluid and there is no risk of backflow of body fluid or the like.

Since the absorbent top sheet of the second invention of the present application is the recess of the first invention, the upper nonwoven fabric and the lower nonwoven fabric are bonded to each other at the bottom surface of the recess, so that there is no through hole in the bottom surface of the recess. 1 In addition to having the same effect as the invention,
Since the peripheral surface area of the recess is large, the permeation into the defibrated pulp is better than that of the peripheral surface of the recess, and the absorption and diffusibility of body fluid etc. into the three-layer absorbent surface sheet are good. .

The third invention and the fourth invention of the present application form an absorbent product by stacking the absorbent top sheet, the absorbent pad, and the waterproof backsheet of the first invention and the second invention of the present application, respectively, to thereby absorb the absorbent product. Bodily fluids etc. flow out from the body surface sheet to the absorbent pad more uniformly to improve the drying property of the absorbent body surface, so that when applied to napkins, disposable diapers, etc., the skin feel can be improved. .

Furthermore, since there is no through hole in the bottom surface of the recess, there is a recess in the absorbent surface sheet, but the absorbent pad is not exposed and backflow of body fluid etc. from the absorbent to the absorbent surface sheet is prevented. Be blocked. Therefore, it is possible to solve the problem in the known art in which the body fluid or the like flows backward and leaks to the surface of the absorbent product to give the user a wet feeling.

[Brief description of drawings]

FIG. 1 is a perspective view of an absorbent top sheet showing an embodiment of the first invention of the present application, FIG. 2 is a sectional view of the same, and FIG. 3 is a sectional view showing an embodiment of the second invention. 4 and 5 show a napkin showing an embodiment of the third invention of the present application, FIG. 4 is a perspective view, and FIG. 5 is a sectional view. FIG. 6 is an explanatory view of the operation of the present invention. 1,3 …… Nonwoven fabric 2 …… Pulp 2a …… Molten pulp A1 …… Absorber surface sheet C …… Porous surface

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical display area A61F 13/54 D04H 1/54 Q 7199-3B D06C 23/04 B A41B 13/02 E

Claims (4)

[Claims] 1. A three-layer structure in which a heat-adhesive non-woven fabric is placed on both sides of a defibrated pulp containing heat-fusible fibers to cover the heat-fusible defibrated pulp with a non-woven fabric, and heat embossing is performed from above the non-woven fabric. It is characterized by forming a number of recesses whose bottom surface is located in the defibrated pulp layer on the surface by processing and making the surface side a porous surface, and the defibrated pulp is present between the bottom surface of the recess and the lower nonwoven fabric. And an absorber topsheet. 2. A heat-adhesive non-woven fabric is disposed on both sides of a defibrated pulp containing heat-fusible fibers to form a three-layer structure in which the heat-fusible defibrated pulp is covered with the non-woven fabric, and heat embossing is performed from above the non-woven fabric. A large number of recesses are formed on the surface by processing so that the surface side is a porous surface and the bottom surface of the recess is a position reaching the lower nonwoven fabric, and the upper nonwoven fabric and the lower woven fabric are bonded to each other at the bottom surface of the recess. An absorber surface sheet characterized by the above. 3. A heat-bonding non-woven fabric is disposed on both sides of a defibrating pulp containing heat-fusible fibers to form a three-layer structure in which the heat-fusible defibrating pulp is covered with a non-woven fabric, and heat embossing is performed from above the non-woven fabric. Absorber surface sheet in which defibrated pulp exists between the bottom surface of the recess and the nonwoven fabric below by forming a number of recesses whose bottom surface is located in the defibrated pulp layer on the surface by processing and making the surface side a porous surface An absorbent product, which is configured by laminating an absorbent pad between the waterproof sheet and the waterproof back sheet. 4. A three-layer structure in which a heat-adhesive non-woven fabric is disposed on both sides of a defibrated pulp containing heat-fusible fibers to cover the heat-fusible defibrated pulp with a non-woven fabric, and heat embossing is performed from above the non-woven fabric. By forming a number of recesses on the surface by processing and making the surface side a porous surface and making the bottom surface of the recess a position to reach the lower nonwoven fabric, the upper nonwoven fabric and the lower woven fabric are bonded to each other at the bottom surface of the recesses. An absorbent product comprising an absorbent pad laminated between an absorbent top sheet and a waterproof back sheet.