JP2511442Y2 - Surface sheet of worn article - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a topsheet for a worn article for treating body fluids.

[0002]

2. Description of the Related Art A liquid-permeable topsheet that wraps an absorbent body is usually used for a body fluid treatment wearing article such as a sanitary napkin and a disposable diaper. There is a technique of using a perforated plastic film or a plastic film provided with a liquid guiding tube in the perforation as the surface sheet, and these techniques are disclosed, for example, in Japanese Patent Publication No. 57-17081.
No. 25, etc.

[0003]

As is apparent from the above-mentioned publicly known documents, there are some examples of the shape of the liquid guiding tube of the surface sheet, such as a tapered capillary tube which is tapered toward the tip direction thereof, a cylinder and the like. When the shape of each of these liquid guide tubes is maintained normally, the body fluid can be efficiently transferred to the absorber by utilizing the capillary phenomenon. However, when the wearing article is actually used, the liquid guiding tube is subject to body pressure in its height direction, for example, causing buckling, other deformation and crushing, which easily causes a closed state, and the body fluid does not transfer well to the absorbent body. There is a drawback that.

In view of this, the present invention has an object to bend the first pipe wall and the second pipe wall of the liquid guiding pipe to make it difficult for the liquid guiding pipe to be crushed, thereby eliminating the drawbacks of the prior art. I am trying.

[0005]

The gist of the present invention to solve the above problems is as follows.

The present invention is premised on a topsheet of a body fluid treatment wearing article having a liquid-permeable topsheet, a liquid-impervious backsheet, and an absorber interposed therebetween.

The surface sheet has an upper surface opening on the upper surface side, and a liquid guiding tube extends from the upper surface opening toward the lower surface side of the surface sheet, and the tip of the liquid guiding tube becomes a lower surface opening. ing.

This liquid guiding tube has a first tube wall whose cross section in the height direction of the tube wall is connected to the upper surface in the entire circumference of the peripheral edge of the upper surface opening or in a range over a length of ½ or more thereof. The second pipe wall extends from one pipe wall to the lower surface opening.

In one of the preferred embodiments, the topsheet is provided with corrugated structures along the perimeter of the top aperture. In another preferred embodiment, the liquid guiding tube is provided with a corrugated structure in its circumferential direction.

[0010]

In the surface sheet having the above structure, when the liquid guiding tube is subjected to body pressure acting in its height direction, the first tube wall portion is first deformed to prevent the liquid guiding tube from easily buckling. can do.

The corrugated structure provided on the surface sheet or the liquid guiding tube more effectively prevents the liquid guiding tube from being deformed quickly when the liquid guiding tube is subjected to body pressure, and the liquid guiding tube is crushed and blocked. be able to.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a perspective view of a sanitary napkin 2 using a surface sheet 1 according to the present invention, a part of which is cut away. The napkin 2 has a liquid-permeable top sheet 1, a liquid-impermeable back sheet 3, and an absorber 4 interposed therebetween. The topsheet 1 is used to enclose the absorber 4 and the backsheet 3, and is sealed by seal lines 5 at the front and rear ends of the napkin. The topsheet 1 has a large number of openings 6, and the excreted body fluid permeates into the absorbent body 4 through the openings 6. However, body fluid does not penetrate the back sheet 3.

FIG. 2 is an enlarged sectional view showing the opening 6. The opening 6 is formed on the upper surface side of the topsheet 1 by an upper surface opening 6A.
And the liquid guiding tube 7 extending from the opening 6A to the lower surface side of the sheet 1.
And the free end of the liquid guiding tube 7 is the lower surface opening 6B. The liquid guiding tube 7 has a cross-sectional tube wall composed of a first tube wall 8 connected to the surface sheet 1 with a taper α °, and a second tube wall 9 that is bent from the first tube wall 8 and extends to the lower surface opening 6B. It is composed by. In the illustrated example, the extension line of the second tube wall 9 makes an angle of about 90 ° with the upper surface of the topsheet 1. When the napkin 2 is worn and the body pressure P acts in the height direction of the liquid guiding pipe 7, the liquid guiding pipe 7 is prevented from buckling and closing due to deformation of the first pipe wall 8 as shown by a chain line 8 '. It can be avoided.

FIG. 3 shows the corrugated structure 1 on the top sheet 1.
It is sectional drawing which simplifies and shows the case where 1 is provided. In FIG. 3A, the corrugated structure 11 is provided along the periphery of the upper surface opening 6A. In FIG. 3B, the first of the liquid guiding tube 7
A corrugated structure 11 having a groove extending in the circumferential direction of the tube wall 8 is provided. In FIG. 3C, the corrugated structure 11 is provided on the second pipe wall 9. In any case, the liquid guiding tube 7 that has received the body pressure P is first deformed in the portion of the corrugated structure 11, and it is possible to avoid buckling or blockage of the liquid guiding tube 7.

4A and 4B are perspective views illustrating the case where the first tube wall 8 of the liquid guiding tube 7 is present only at a part of the peripheral edge of the upper surface opening 6A and its X-. It is an X-ray sectional view. It is not always necessary that the first tube wall 8 exists on the entire circumference of the upper surface opening 6A, and if the first tube wall 8 exists in the range L over the length of ½ or more of the peripheral edge of the upper surface opening 6A, the intended purpose is achieved. can do. In the figure, one of the tube wall cross sections is constituted only by the second tube wall 9.

When the body pressure is lightly received in the liquid guiding tube 7 illustrated in FIGS. 2 to 4, the first tube wall 8 and the corrugated structure 11 are gently deformed to exhibit a cushioning effect. Therefore, the topsheet 1 according to the present invention is light and comfortable to the touch.

The shape of the opening of the liquid guiding tube 7 can be an ellipse or an appropriate polygon other than a circle.

The above-mentioned topsheet 1 is used such that the upper surface opening 6A contacts the human body and the lower surface opening 6B contacts the absorber 4. The topsheet 1 can be obtained by vacuum forming a polyethylene film or another plastic film. Known materials may be used for the back sheet 3 and the absorber 4.

[0020]

EFFECTS OF THE INVENTION Since the liquid guide tube to which body pressure is applied can be prevented from buckling and closing due to the deformation of the first tube wall, the transfer of body fluid to the absorber is hindered by the deformation of the liquid guide tube. Never.

If a corrugated structure is provided in the liquid guiding tube or its periphery, the deformation of the liquid guiding tube can be concentrated here, and the blocking of the liquid guiding tube can be more effectively avoided.

[Brief description of drawings]

FIG. 1 is a perspective view showing a sanitary napkin with a part thereof cut away.

FIG. 2 is an enlarged sectional view of a liquid guide tube.

FIG. 3 is a side view of a liquid guiding tube having a corrugated structure.

FIG. 4 is a cross-sectional view of a liquid guiding tube having a first tube wall only in a part of an upper surface opening.

[Explanation of symbols]

 1 Top Sheet 3 Back Sheet 4 Absorber 6A Upper Surface Opening 6B Lower Surface Opening 7 Liquid Conducting Tube 8 First Pipe Wall 9 Second Pipe Wall 11 Corrugated Structure

Claims (4)

(57) [Scope of utility model registration request] 1. A surface sheet of a body fluid treatment wearing article having a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorber interposed therebetween, wherein the top sheet is An upper surface opening is provided on the upper surface side, and a liquid guiding tube extends from the upper surface opening toward the lower surface side of the surface sheet,
The leading end of the liquid guiding tube is a lower surface opening, and the liquid guiding tube has a first tube wall whose cross section in the height direction of the tube wall is connected to the upper surface and a lower surface opening which is bent from the first tube wall. The above-mentioned surface sheet, which is constituted by a second pipe wall extending into the hole. 2. The first pipe wall is 1 / of the peripheral edge of the upper surface opening.
The surface sheet according to claim 1, wherein the surface sheet is provided in a range of two or more lengths. 3. The surface sheet according to claim 1, wherein the surface sheet is provided with a corrugated structure along the periphery of the upper surface opening. 4. The surface sheet according to claim 1, wherein the liquid guiding tube is provided with a corrugated structure in a circumferential direction thereof.