JPS607491B2 - sanitary product absorber - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the structure of absorbent articles for sanitary products such as sanitary napkins and disposable diapers.

Conventionally, this type of absorbent material has been made of a superabsorbent sheet made of a film of a water-insoluble polymeric material that has absorbent swelling properties inside or on the lower surface of an expanded pulp layer, or containing powder of the material. The one with this position is in practical use.

The reason why the superabsorbent sheet is placed in the defibrated pulp layer is that the superabsorbent sheet absorbs, diffuses, and retains body fluids absorbed in the defibrated pulp layer. However, in conventional absorbent bodies, the scale-woven pulp layer and the superabsorbent sheet are simply layered, so body fluids absorbed into the defibrated pulp layer have a weak ability to transfer to the superabsorbent sheet.
There is a strong tendency to remain in the twill pulp layer, and as a result, it bleeds onto the skin and causes the surface to become sticky, causing discomfort to the wearer. The effect was not achieved sufficiently. On the other hand, conventionally, ``weaving pulp'' is often used as an absorbent material for sanitary products because it is inexpensive and has excellent flexibility and elasticity, but it has the disadvantage of low diffusivity, so the entire defibrated pulp layer is Products that are pressed in a straight line or partially pressed into a linear shape are used in practice.

However, since such an absorbent body is pressed as described above, the absorbent body as a whole becomes hard and has the disadvantage that the flexibility and elasticity, which are the advantages of defibrated pulp, are lost. The purpose of the present invention is to eliminate the above-mentioned drawbacks.
The structure of the present invention for achieving the object will be described below using the illustrated embodiments as an example.

As shown in FIGS. 1A and 1B, an absorbent body 1 according to the present invention includes a mat-like defibrated pulp layer 2 and a superabsorbent sheet 3.

The defibrated pulp layer 2 has its both sides 4 bent inwardly, and in the case shown in FIG. The both side parts 4 are stacked one on top of the other.

Although not shown, at least one side of the defibrated pulp layer 2 may be coated with pulp as required, as is generally done when defibrated pulp is formed into an absorbent material such as a sanitary napkin or a disposable diaper. , a water-permeable sheet made of rayon fiber or the like may be placed. The superabsorbent sheet 3 is most preferably one in which a powder of a water-insoluble polymeric substance having absorbing and swelling properties is integrally deposited between absorbent sheets in the form of a sandwich; A film of the substance, an absorbent sheet on at least one side of the film of the substance; It is made of at least one kind of laminated with a fiberglass material, and both end portions 5 are made of a defibrated pulp layer 2.
It is located inside the defibrated pulp layer 2 without contacting the both-side bent ends 6 formed by the folding of the both-side parts 4.

Furthermore, as shown in FIGS. 2 and 3 A and B, the absorber 1 is
With the superabsorbent sheet 3 superimposed on the central part of the defibrated pulp layer 2, embossing is applied to the entire area so that there are press parts 7 that are not continuous with each other and non-press parts 8 that are continuous with each other. This embossing integrates the woven pulp layer 2 and the superabsorbent sheet 3.The absorbent body 1 shown in FIG. 3A has unevenness on one side, and the absorbent body 1' shown in FIG. 3B has unevenness on both sides. However, the embossing integrates the de-twilled pulp layer 2 and the superabsorbent sheet 3, and creates pressed parts 7 that are not continuous with each other and non-pressed parts 8 that are continuous with each other. Any of the absorbent bodies 1 shown in Fig. 3 A and B may be used as long as the absorbent body 1 is in the state shown in Fig. 4.
As shown in the figure, the shape pattern of the embossing consisting of the pressed part 7 and the non-pressed part 8 is various and not limited, but the occupied ratio of the pressed part 7 to almost the entire upper surface of the absorbent body 1 is 15 to 60. %. If it is less than 15%, the desired diffusivity, shape retention, etc. cannot be obtained, and if it is more than 60%, the whole becomes hard. The absorbent body 1 constitutes a sanitary product by, for example, placing a water-impermeable sheet on at least its lower surface and covering the whole with a water-permeable sheet for exterior use. This relates to the structure of the absorbent body 1 itself, and does not concern the structure of the sanitary product as a whole.

According to the present invention, the defibrated pulp layer 2 and the superabsorbent sheet 3 constituting the absorbent body 1 are stacked on top of each other and are integrated, so that body fluids absorbed by the defibrated pulp layer 2 are highly absorbent. As a result, the amount of body fluid that is absorbed and remains in the defibrated pulp layer 2 that is in contact with the skin is reduced, and the residual body fluid that comes into contact with the skin is absorbed and retained. Stickiness is eliminated.

In addition, the embosses of the absorbent body 1 are arranged in a press part 7 that does not disturb each other.
and non-pressed parts 8 that are continuous with each other, the flexibility of the absorbent body 1 as a whole is not impaired, and each of the pressed parts 7 that are not continuous with each other has the function of sucking body fluid between them. This will increase the diffusion of body fluids. Furthermore, when the embossing is applied with the highly absorbent sheet 3 superimposed on the defibrated pulp layer 2, compared to the case where the embossing is applied only to the defibrated pulp layer 2, "highly absorbent" The embossing press pressure in the portion where the superabsorbent sheets 3 are stacked is greater than that in other portions by the thickness of the superabsorbent sheet 3.

Therefore, if the superabsorbent sheet 3 is also overlaid on both bent ends 6 of the dewoven pulp layer 2, which corresponds to the inner thigh when wearing sanitary products, the flexibility of that part will be reduced. Since the superabsorbent sheet 3 is not located at the bent ends 6 on both sides, the flexibility of that part does not decrease. In addition, the parts where the press pressure is high have a stronger ability to absorb and diffuse body fluids than other parts, so body fluids can be absorbed over the length of the superabsorbent sheet 3 before diffusing to the sides of the dewoven pulp layer 2. The property of spreading in the horizontal direction is strengthened, thus eliminating so-called side leakage from the sides of the sanitary product. Furthermore, the key woven pulp layer 2 and the superabsorbent sheet 3 are stacked and embossing is applied, and both sides 4 of the defibrated pulp layer 3 are bent, so that the entire absorbent body 1 is It is possible to prevent the wearer from losing its shape, and the curved surfaces and elasticity of the bent end portions 6 on both sides formed by the bending can also improve the feeling of pressure against the inner thigh.

[Brief explanation of drawings]

The drawings show embodiments of the absorbent body of the present invention, and FIG.
, B is a cross-sectional view of the absorber in the thickness direction with the embossing removed,
Figure 2 is a partial plan development view of the absorbent body, Figures 3 A and B are partial enlarged sectional views in the thickness direction of the absorbent body showing the embossed structure, and Figures 4 A, B, C, and D show the embossed pattern. FIG. 1...Absorber, 2...Defibrated pulp layer, 3...
...Highly absorbent sheet, 4...Both sides, 5
. . . both ends, 6 . . . both bent ends, 7 . . . non-continuous pressed portion, 8 . . . continuous non-pressed portion. Figure 1 Figure 2 Figure 3 Figure 4

Claims (1)

[Scope of Claims] 1. The absorbent body is composed of a defibrated pulp layer and a superabsorbent sheet, and the superabsorbent sheet is stacked in the center of the defibrated pulp layer, and the defibrated pulp layer and the superabsorbent sheet Almost the entire area of the flexible sheet is embossed to create press areas that are not continuous and non-press areas that are continuous, and the defibrated pulp layer and the superabsorbent sheet are integrated by the embossment. An absorbent body for sanitary goods, characterized in that both sides of the defibrated pulp layer are folded inwardly so that the superabsorbent sheet is located inside the defibrated pulp layer. 2. An absorbent sanitary product according to claim 1, characterized in that both side ends of the superabsorbent sheet are not in contact with both side bent ends formed by folding both sides of the defibrated pulp layer. body. 3. The absorbent body for sanitary goods according to claim 1, wherein the superabsorbent sheet is made of a water-insoluble polymeric substance that has absorption-swelling properties, or contains powder of the substance. 4 A superabsorbent sheet in which a powder of a polymeric substance that is water-insoluble and has absorption-swelling properties is integrally sandwiched between the absorbent sheets in a sandwich-like manner, and the powder of the substance is integrally formed on at least one side of the absorbent sheet. A mixture of powder of the substance and defibrated pulp in an appropriate ratio and compression molded into a sheet, a film of the substance, and a film of the substance laminated on at least one side with an absorbent sheet. The sanitary article absorbent according to claim 3, characterized in that the sanitary article absorbent comprises one type of absorbent article. 5 Occupancy ratio of press parts that are not consecutive to each other is 15 to 60%
An absorbent body for sanitary goods according to claim 1, characterized in that: