JPH0539691Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a so-called sanitary napkin that absorbs and retains menstrual blood.

[Conventional technology and its issues]

Conventionally, in sanitary napkins, a fibrous layer or a hydrophobic net layer having a lower density than the top sheet is interposed between the water permeable top sheet on the menstrual blood absorbing surface and the upper surface of the absorbent core covered by the top sheet. something is known. This separates the top sheet and the upper surface of the core through the interposition of the fiber layer. In other words, the top sheet is floated from the upper surface of the core, and menstrual blood is quickly absorbed into the core via the top sheet in spots, while the core By reducing the backflow of menstrual blood absorbed by the wearer and oozing out into the core, the wet state of the top sheet is reduced, and once wet areas are quickly dried to avoid causing discomfort to the wearer. It is intended that

On the other hand, conventionally, in sanitary napkins, compressed grooves that function as bending guides when worn are provided in the laminate or core of the napkin's structural members in the length direction, or cuts that perform the same function are provided in the core. things are known. This napkin has compressed grooves or cuts to improve the fit and adhesion of the napkin to women's private parts.

However, the intended effect of the known technology is
Due to the above structure, this has not yet been fully achieved.

An object of the present invention is to provide a sanitary napkin that can further improve the above-mentioned effects by the means described below.

[Means to solve the problem]

To achieve the above object, the sanitary napkin of the present invention has a hydrophilic nonwoven fabric net interposed between the lower surface of the liquid permeable top sheet and the upper surface of the liquid absorbent core (referred to as the first means).

The sanitary napkin of the present invention further includes first compressed grooves extending in the length direction on both sides of the upper surface of the napkin and having narrower intervals at approximately the center thereof, and first compression grooves extending from the center of the lower surface of the napkin in the width direction. A second compression groove extending near the rear end in the length direction is provided (referred to as a second means).

[Effect]

According to the first means, menstrual blood excreted on the upper surface of a certain area of the top sheet passes through the pores of the nonwoven fabric net in that area and is rapidly permeated by the capillary action of the fiber bundles that define the pores. Absorbed into the core, ie rapidly spot absorbed. on the other hand,
Since the nonwoven fabric net forms a gap between the top sheet and the core, the menstrual blood absorbed into the core is less likely to flow back and leak into the top sheet.

According to the second means, when the napkin is worn, the central part of the napkin is raised in a so-called mountain shape toward the wearer's skin through the second compression grooves, and the napkin is raised through the first compression grooves into a mountain shape. Both side parts are bent toward the wearer's skin, and the whole is transformed into a substantially W-shaped three-dimensional structure. This modification enhances the fit of the napkin to the female private parts and minimizes leakage of menstrual blood.

〔Example〕

The napkin of the present invention will be explained as follows with reference to the drawings.

In FIGS. 1 to 3, the napkin consists of a vertically long mat-like absorbent core 1, a hydrophilic nonwoven fabric net 2 located on the upper surface of the core 1, and a hydrophilic nonwoven fabric net 2 placed on both sides of the nonwoven fabric net 2 from the bottom surface of the core 1. It consists of a liquid-impermeable back sheet 3 that covers the upper surface, and a liquid-permeable top sheet 4 that covers these laminates from the upper surface to the lower surface and overlaps them on the lower surface, and both longitudinal ends 5 of the top sheet 4 are bonded by thermocompression. It is sealed.

A napkin having such a configuration has compressed grooves 6 extending in the length direction on both sides of the upper surface and having narrower intervals at the center thereof, and a lower surface of the napkin where the compressed grooves 6' having narrower intervals are located. From the center in the width direction to the rear end (upper end) in the length direction
A compressed groove 7 extending to the vicinity is provided respectively. Furthermore, the compressed groove 7 on the lower surface of the napkin
Adhesive parts 8 for attaching to wearing shorts are provided on both sides of the napkin, extending from the longitudinal center of the napkin to near its front end (lower end).

By heating the compressed grooves 6, 6', and 7,
The back sheet 3 and top sheet 4 are welded together in that part, so that the back sheet 3 does not shift during handling or wearing of the napkin.

The core 1 is made of a mixture of flat pulp and highly absorbent polymer powder, the back sheet 3 is made of plastic film, and the top sheet 4 is made of nonwoven fabric. This non-woven fabric is the fifth
As shown in the figure, upper and lower layers 9 of hydrophobic fiber web,
The lower layer 10 has a lower density than the upper layer 9. The nonwoven fabric net 2 is made of hydrophilic fibers such as rayon, and has holes (eyes) 12 defined by fiber bundles 11, as shown in FIGS. 6 and 7. Such a nonwoven fabric net 2 is, for example,
It can be obtained by placing a fiber web on a support having a large number of protrusions on its surface or a net-like support, and rearranging and intertwining the fibers with a high-speed fluid from above. The basis weight is 10-60g/ ^m2 ,
It is preferable that the thickness is 0.2 to 1.5 mm, the porosity is 30 to 70%, and the area of one hole 12 is 0.2 to 3 mm ² . The adhesive portion 8 is provided by applying a hot melt adhesive.

The napkin of the present invention having the above-mentioned structure reduces stress from the wearer's thighs when worn with elastic shorts with the center portion between the narrowly spaced compressed grooves 6' being in contact with the female private parts. By receiving it, it transforms into a substantially W-shaped three-dimensional structure at the crotch, as shown in Figure 4, and fits tightly into the female private parts. That is,
The central part between the compressed grooves 6' protrudes in a chevron shape toward the wearer's skin via the compressed grooves 7, and both side portions bend toward the wearer's skin through the compressed grooves 6 and come into close contact with each other. It turns out.

[Effect of idea]

According to the napkin of the present invention having the above-described structure and function, since the hydrophilic nonwoven fabric net is interposed between the top sheet and the core, spot absorption from the top sheet to the core and absorption capacity due to capillary action are improved, and the top sheet The menstrual blood absorption port does not diffuse, and the feeling of moisture given to the wearer can be minimized.

In addition, since compression grooves are provided on both sides of the upper surface of the napkin and in the center of the lower surface, the napkin has a three-dimensional structure that fits tightly against the female private parts in the crotch of the wearer, and prevents menstrual blood from flowing from the napkin. So-called side leakage can be prevented.

[Brief explanation of the drawing]

The drawing shows an example of the napkin of the present invention.
Figure 1 is a top plan view, Figure 2 is a bottom plan view, and Figure 3 is a top plan view.
The figure is a cross-sectional view, FIG. 4 is a cross-sectional view in a deformed state, FIG. 5 is a partial cross-sectional view of the top sheet, FIG. 6 is a partial plan view of the non-woven fabric net, and FIG. 7 is a partial cross-sectional view of the top sheet. is an enlarged plan view of a portion of FIG. 6; DESCRIPTION OF SYMBOLS 1... Core, 2... Nonwoven fabric net, 3... Back sheet, 4... Top sheet, 5... Longitudinal end, 6, 6', 7... Pressed groove, 8... Adhesive portion.

Claims (1)

[Claims for Utility Model Registration] (1) A pine-like liquid-absorbing core, a liquid-impermeable back sheet located on the lower surface of the core and folded back to the upper surface of both lateral sides of the core, and at least the core. A sanitary napkin comprising an upper surface and a liquid-permeable top sheet positioned on the upper surface of the folded portion of the backsheet, and in which both ends of the top sheet in the longitudinal direction are sealed, between the lower surface of the top sheet and the upper surface of the core. The above-mentioned napkin is characterized in that a hydrophilic nonwoven fabric net is interposed therein. (2) The napkin according to claim 1, wherein the first compressed grooves extend in the length direction on both sides of the upper surface of the napkin and have narrower intervals at approximately the center thereof, and the widthwise center of the lower surface of the napkin. and a second compressed groove extending from the section to the vicinity of the rear end in the longitudinal direction.