JPH04197353A - Absorptive article - Google Patents

Abstract

PURPOSE:To simplify manufacturing process by omitting an exfoliation sheet and reduce the manufacturing cost by arranging an adhesive at the contact part with a reverse surface sheet of a waterproof sheet and forming the exfoliation processing part at the part of the reverse surface sheet in contact with the adhesive and permitting the reverse surface sheet to be exfoliated from the adhesive. CONSTITUTION:A plurality of adhesives 7 are arranged in the longitudinal direction, keeping each nearly equal interval, at the contact part with a reverse surface sheet 2 of a waterproof sheet 5. An exfoliation processing part 2A is formed at the contact part with each adhesive 7 of the reverse surface sheet 2, and further an exfoliation-enabled part 2B for exfoliation- removing the exfoliation processing part 2A from the reverses sheet 2 is installed. The exfoliation-enabled part 2B is constituted of the elliptical sewing machine perforation 2C formed on the reverse surface sheet 2 so as to surround the exfoliation processing part 2A. In the use of a sanitary napkin, the exfoliation-enabled part 2B is pulled out by holding the center part of the reverse surface sheet 2 by fingers, and then the reverse surface sheet 2 is broken along the sewing machine perforations 2C, and removed from the napkin, and the adhesive 7 on the waterproof sheet 5 is exposed. Then, the adhesive 7 is attached so as to contact the underwear, and pressed, and then the napkin is attached on the underwear, and can be fixed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to absorbent articles such as sanitary napkins and disposable diapers.

[Prior Art] Conventional absorbent articles such as sanitary napkins and disposable diapers generally include a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorbent body interposed between these two sheets. Many of them are configured so that they can be fixed to underwear such as shorts using an adhesive provided on the back sheet.

In addition, recently, menstrual blood once absorbed by an absorber,
In order to prevent urine etc. from leaking from the absorbent body, the absorbent body is often covered with a waterproof sheet. The adhesive on the back sheet of such an absorbent article is always bonded with a release sheet I for protecting the adhesive. Therefore,
When using conventional absorbent articles, the release sheet was peeled off from the adhesive and fixed to underwear.

[Problems to be Solved by the Invention] However, recent absorbent articles, especially sanitary napkins, tend to have a relatively wide range of adhesives.
As a result, the size of the release sheet also increases, resulting in a corresponding increase in the manufacturing cost of the absorbent article.

Furthermore, when manufacturing conventional absorbent articles, a trowel is required to attach and attach the release sheet to the adhesive on the backing sheet, which also increases the manufacturing cost of absorbent articles. Ta.

Therefore, an object of the present invention is to provide an absorbent article in which a release sheet can be omitted, the manufacturing process can be simplified, and the manufacturing cost can be reduced.

[Means to solve the problem]

As a result of various studies on the structure of absorbent articles, particularly absorbent articles covered with absorbent waterproof sheets, the inventors of the present invention have found that the above object can be achieved by making specific improvements to the back sheet. I found out.

The present invention was made based on the above findings, and includes a liquid-permeable top sheet, a liquid-impermeable back sheet, an absorbent body interposed between these two sheets, and at least the back side of the absorbent body. In an absorbent article comprising a waterproof sheet covering the sides, an adhesive is provided at a portion of the waterproof sheet that comes into contact with the back sheet, and a release treatment section is provided at a portion of the back sheet that comes into contact with the adhesive. The present invention also provides an absorbent article, characterized in that the back sheet is provided with a peelable portion for peeling the peel-treated portion from the adhesive.

[Effect]

According to the absorbent article of the present invention, when the absorbent article is used, when the separable part of the back sheet 1- is pinched with fingers and peeled off from the adhesive of the waterproof sheet, the adhesive provided on the waterproof sheet is removed. The absorbent article can be secured to the undergarment by pressing the absorbent article onto the undergarment so that the adhesive is exposed and adheres to the undergarment.

〔Example〕

The present invention will be explained below based on the embodiments shown in FIGS. 1 to 4. In each figure, FIG. 1 is a lateral sectional view showing the main parts of a sanitary napkin which is an embodiment of the absorbent article of the present invention, and FIG. 2 is a back side of the sanitary napkin shown in FIG. 1. 3 is a plan view showing a state in which the removable portion of the backsheet shown in FIG. 1 has been peeled off, and FIG. 4 is a sanitary napkin which is another embodiment of the absorbent article of the present invention. FIG. 3 is a diagram corresponding to FIG.

As shown in FIG. 1, the sanitary napkin of this embodiment has a liquid-permeable surface seam provided on the side that comes into contact with the skin.・1 and
Liquid-impermeable back seam provided on the side that contacts underwear
2, and an absorbent body 3 that is interposed between these two sheets 1-1.2 and absorbs and retains menstrual blood that has passed through the top sheet 1. Then, the top sheet 1 is attached to the absorbent body 3.
The back sheet 2 is formed to a size that covers only the front surface of the absorbent body 3, and the back sheet 2 is formed to cover the back surface of the absorbent core 3, the peripheral side surface, and the side edge of the top sheet 1.
The back sheet 2 is bonded in a bead shape with a hot melt adhesive or the like at the side edge to form a bonded portion 4. Further, the absorber 3 has a back surface, a peripheral surface, and a side edge of the front surface covered with a waterproof sheath 1 and 5. On the surface of the absorbent body 2, the extending edge of the waterproof sheet 5 is bonded to the back surface of the topsheet 1 in a bead shape using an adhesive to form a bonded portion 6.

Further, an adhesive 7 is provided on a portion (back surface) of the waterproof sheet 5 that comes into contact with the back sheet 2 . As shown in FIGS. 1 to 3, this adhesive 7 extends in the longitudinal direction,
A plurality of them (three in the drawing) are provided at approximately equal intervals in a direction perpendicular to the longitudinal direction (width direction of the back sheet 2).

Further, a peeling treatment section 2A (portion indicated by a thick line in FIG. 1) is provided at a portion of the back sheet 2 that comes into contact with each of the adhesives 7. Further, the back sheet 2 is provided with a peelable portion 2B that can peel and remove the peel processing portion 2A from the back sheet 2. This peelable portion 2B can be peeled off from the back sheet 2 through an oval perforation 2C (ellipse indicated by a broken line in FIG. 2) formed in the back sheet 2 so as to surround the peel-treated portion 2A. It is configured as follows. In FIG. 1, reference numeral 8 denotes an adhesive portion formed by bonding the back sheet 2 and the waterproof sheet 5 together in a bead shape using the adhesive.

When using the sanitary napkin of the above embodiment, grasp the center of the back sheet 1-2 with your fingers and remove the peelable part 2B.
When pulled, the back sheet 2 is torn at the perforation 2C and the removable portion 2B is removed from the sanitary napkin, exposing the adhesive 7 of the waterproof sheet 5 as shown in FIG. After that, when this sanitary napkin is brought into contact with the underwear so that the adhesive part 7 is in contact with the underwear and the sanitary napkin is pressed against the underwear, this sanitary napkin will be adhesively fixed to the underwear. .

As explained above, in the sanitary napkin of this embodiment, since the back sheet 2 also serves as a release sheet,
There is no need to prepare a release sheet independently, and the manufacturing cost 1- can be reduced accordingly. Therefore, economical sanitary napkins can be manufactured regardless of the recent expansion of the application range of adhesives and the accompanying increase in the size of release sheets. Of course, since the step of providing a release sheet can be omitted, manufacturing costs can also be reduced in this respect.

Further, FIG. 4 is a diagram showing a sanitary napkin as another embodiment of the absorbent article of the present invention.

As shown in the same figure, the sanitary napkin of this embodiment has the following features, except that a long sleeve-like perforation 2D is provided in the widthwise center and longitudinal direction of the peelable part 2B in the sanitary napkin shown in FIG. The structure is substantially the same as the sanitary napkin shown in FIG.

According to this embodiment, the peelable portion 2B is removed by grasping the peelable portion 2B and tearing the back seam 1 at the arc-shaped perforations 2C, 2C, and the longitudinal perforation 2D. It can be opened on both sides at the fold line portions 2C2, 2C2 on both sides. With the removable portion 2B open in this manner, when the adhesive 7 is brought into contact with the underwear and the sanitary napkin is pressed against the underwear, the sanitary napkin is adhesively fixed to the underwear. By folding the peelable parts 2B, 2B, which are open on both the left and right sides of the sanitary napkin, so as to surround the crotch part of the underwear, the sanitary napkin is more securely fixed to the underwear, and the position of the sanitary napkin is prevented. This can be reliably prevented.

That is, in the sanitary napkin of this example, the peelable part 2B
, 2B can be used as a flap part.

In addition, although the above-mentioned example explained only a sanitary napkin, the absorbent article of the present invention can be used in addition to sanitary napkins.
It can be appropriately applied to disposable diapers, absorbent articles for vaginal discharge, etc.

〔Effect of the invention〕

In the absorbent article of the present invention, a release sheet can be omitted, and the manufacturing process can be simplified, thereby reducing manufacturing costs.

[Brief explanation of the drawing]

FIG. 1 is a lateral sectional view showing the main parts of a sanitary napkin which is an embodiment of the absorbent article of the present invention, the second is a front view showing the back side of the sanitary napkin shown in FIG. Figure 3 is the first
FIG. 4 is a front view showing a state in which the peelable portion of the back sheet shown in the figure has been peeled off, and FIG. 4 is a view corresponding to FIG. 3 showing a sanitary napkin which is another embodiment of the absorbent article of the present invention. 1: Top sheet 2: Back sheet 2A; Peeling processing section 2Bi peelable section 2C12C+, 2D
; Perforation 3; Absorber 5; Waterproof sheet

Claims (3)

[Claims] (1) An absorbent article comprising a liquid-permeable top sheet, a liquid-impermeable back sheet, an absorbent body interposed between these two sheets, and a waterproof sheet covering at least the back side of the absorbent body. In this step, an adhesive is provided at a portion of the waterproof sheet that contacts the back sheet, a release treatment portion is provided at a portion of the back sheet that comes into contact with the adhesive, and the release treatment portion is attached to the back sheet with the adhesive. An absorbent article characterized by having a peelable part that can be peeled off from the absorbent article. (2) The removable portion is formed by providing a perforation in the back sheet surrounding the releasable portion, and is removable via the perforation.
) Absorbent article described. (3) The absorbent article according to claim 2, wherein the peelable portion is provided with a perforation at the center in the width direction and in the longitudinal direction, and can be opened both ways through the perforation.