JPH07136212A - Absorbent articles and production thereof - Google Patents

Abstract

PURPOSE:To dam up the body fluid rolling on a surface sheet or the body fluid transferring on a user's body, to surely prevent lateral leakage and bring the gathers into tight contact with the user's skin so as to assure wearing of a good fit by forming the gathers rising to a V shape on both sides of the absorbent articles. CONSTITUTION:Sheets consisting of water repellent or water impermeable materials are laminated and plural elastic materials 3 are fixed in parallel in the longitudinal direction of the inside surfaces of the laminated parts, by which a pair of both-side leakproof pieces 4 are formed. A pair of these both- side leakproof pieces 4 are placed via a body fluid absorbing spacing 6 on both surface sides of the surface sheet 5 of the absorbent article body and thereafter, the elastic materials 3 of the both-side leakproof pieces 4 are fixed to the surface sheet 5 the both-side leakproof pieces 4 are risen to the V shape to both sides of the surface sheet 5 by the contraction force of the elastic materials 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an absorbent article such as a sanitary napkin and a sheet for exclusive use of a garment and a method for manufacturing the same, which prevents lateral leakage of body fluid at the time of wearing and gives a good wearing feeling. Is what you are trying to do.

[0002]

2. Description of the Related Art Conventionally, absorbent articles such as sanitary napkins and sheets for exclusive use of clothes have been disclosed in, for example, Japanese Patent Laid-Open No. 5-22019.
The invention described in Japanese Patent No. 1 is known. The above invention, on both sides of the napkin body, fixing both side pieces with elastic bodies attached,
It has been attempted to raise these both side pieces either inward or outward of the surface sheet.

By raising both side pieces inward, a pocket-like space for temporarily retaining body fluid can be formed between the both side pieces and the surface sheet. Therefore, even if the body fluid discharged from the user has surface tension or the like and easily rolls on the surface sheet, both side pieces can prevent the body fluid from leaking laterally on the surface sheet. .

[0004]

However, the method of raising both side pieces inward of the topsheet is capable of stopping the body fluid on the topsheet, but lateral leakage of the body fluid transmitted through the body of the user. It was difficult to prevent. That is,
If the width of the both side pieces is made large and the both side pieces are raised to a high level, the skin of the user and the both side pieces are brought into close contact with each other, and it becomes possible to stop the bodily fluids transmitted through the body of the user. However, when this method is performed, the area where both side pieces cover the surface sheet becomes large, the body fluid absorption interval between the both side pieces becomes narrow, and it becomes difficult to bring the body fluid into contact with the surface sheet. There was a risk that side leakage would occur along the surface.

In contrast to the above method of raising both side pieces inside the top sheet, the method of raising both side pieces outside the top sheet has a large forming width for both side pieces.
There was no risk of covering the top sheet, and both side pieces that were raised up were in close contact with the user's skin, and were able to stop the bodily fluids that were transmitted to the user's body.

However, in the method of raising both side pieces to the outside of the topsheet, since no pocket-like space is formed between the both side pieces and the topsheet, body fluid rolling on the topsheet is stopped. Can not be retained,
Lateral leakage was likely to occur.

The present invention is intended to solve the above-mentioned problems, and in absorbent articles such as sanitary napkins and sheets for exclusive use of clothes, gathers rising in a V-shape are formed on both sides of the surface sheet. By forming it, the body fluid that tries to roll on the surface sheet and the body fluid that is transmitted to the body of the user are stopped, and the side leakage is surely prevented.

[0008]

In order to solve the above-mentioned problems, the present invention laminates a water-repellent or water-impermeable sheet, and a plurality of elastic bodies are stretched in the longitudinal direction on the inner surface of the laminated part. A pair of both side leak preventive pieces are formed by fixing in parallel, and the pair of both side leak preventive pieces are provided on both sides of the surface sheet having an absorbent layer between the leak preventive sheet and a body fluid absorbing space. The leak preventive pieces on both sides are fixed to the surface sheet between the parallel elastic bodies, and the contractile force of the elastic body raises the leak preventive pieces on both sides of the surface sheet in a V shape. .

As a method for embodying the above invention, an adhesive is applied to the surface of a water-repellent or water-impermeable sheet, and at least four elastic bodies are provided at regular intervals in the adhesive application portion. After fixing and fixing in parallel in the lengthwise direction via the sheet, both sides of the sheet are folded back to the front side to cover the elastic body, and then the center portion in the width direction of the folded sheet is cut in the lengthwise direction. A pair of both-sided leak-proof pieces for mounting two or more elastic bodies in parallel with each other with a constant space therebetween, and the both-sided leak-proof pieces should be provided with an absorbent layer between them. Place on both sides of the surface sheet through the bodily fluid absorption space, fix between the parallel elastic bodies of the leak preventive pieces on the surface sheet, and then fix the surface sheet and the leak preventive sheet protruding from the outer periphery of the absorbent layer by heat welding. Then, after starting up in a V-shape, set both ends and both sides of this heat-welded part to the target shape. It is characterized in that carried out by Tsu door.

Further, the absorbing layer may have narrow cut portions on both sides in the lengthwise direction.

Further, the absorption layer may be formed so that both sides in the length direction are parallel to each other.

Further, the elastic body of the leak preventive pieces on both sides may strengthen the contraction force on the side of the bodily fluid absorption interval in the state of being fixed to the surface sheet.

[0013]

Since the present invention is configured as described above, since the leak preventive pieces on both sides form gathers that rise inward of the surface sheet and gathers that rise outward,
Due to the contracting force of the elastic body, it rises in a V shape on both sides of the topsheet.

The body fluid discharged from the user is absorbed by the absorbent layer side from the body fluid absorbing space between the leak-proof pieces on both sides.

Further, the leak preventive pieces on both sides form a pocket-like body fluid absorbing space between the gathers on the inner side and the surface sheet. Therefore, even when the body fluid has surface tension or the like and easily rolls on the surface sheet, the body fluid is absorbed by the absorbent layer side by being stopped by the both side leak preventive pieces forming the pocket-shaped body fluid absorbing space.

Further, the leak preventer on both sides raises the gather on the outer side on the side opposite to the bodily fluid absorption interval, and this gather on the outer side does not cover the bodily fluid absorption interval. The rising height is not restricted, and the gather that rises greatly adheres to the user's skin. Therefore, the gathers on the outer side stop the body fluid that is transmitted through the body of the user, and side leakage is prevented.

In this manner, the absorbent article is V-shaped by fixing the gathers on the inner side and the gathers on the outer side by fixing the elastic bodies of the leak-proof pieces on both sides to the surface sheet. Stand up. Therefore, body fluid that easily rolls on the surface sheet,
The leak-proof pieces on both sides stop the bodily fluids flowing through the user's body.
For this reason, compared to the conventional method of forming gathers on one of the inward and outward sides of the topsheet, the effect of preventing lateral leakage is high and hygienic mounting is possible. In addition, since the leak-proof pieces on both sides are in close contact with the user's skin and the fit is improved,
Good usability.

Further, if the absorbent layer is formed with narrowed narrowed portions on both sides in the lengthwise direction, the narrowed portions are aligned with the shape of the inner crotch of the user, and twisting is less likely to occur, resulting in side leakage. It is easy to prevent.

If the absorption layer is formed so that both sides in the length direction are parallel to each other, the shape can be simplified and simple molding can be performed.

Further, the elastic body of the leak preventive pieces on both sides can reduce the inclination of the surface sheet toward the bodily fluid absorption interval side by increasing the contraction force on the bodily fluid absorption interval side in the fixed state to the top sheet. Since it rises at a steep angle, the distance between the gather on the inner side and the surface sheet can be increased, and the side leakage prevention effect is high. Further, by raising the gathers on the inner side to a high level, it is possible to form a large bodily fluid absorption interval, so that it is possible to smoothly absorb bodily fluid to the absorbent layer side.

[0021]

EXAMPLES Examples of the present invention will be described below with reference to the drawings. (1) is a water-repellent or water-impermeable sheet, a water-repellent non-woven fabric, or a water-impermeable film such as polyethylene. Etc. can be formed. Also, sheet (1)
When formed of a water-impermeable material, the body fluid does not permeate even when the user wears it for a long time, and it is possible to reliably prevent lateral leakage of the body fluid.

When the sheet (1) is formed of a water repellent non-woven fabric, it repels body fluids, prevents side leakage and is less likely to cause stuffiness, and the excellent feel of the non-woven fabric makes it possible to obtain a soft feeling of use. Become.

Further, as shown in FIG. 3, the sheet (1) is coated with an adhesive in the lengthwise direction to form an adhesive application portion (2). This adhesive application part (2) may be formed over the entire area of the sheet (1), but if it is applied over half the area of the sheet (1), the amount of adhesive used is small and economical. Can be formed.

Further, as shown in FIG. 3, an elastic body (3) made of raw rubber, urethane rubber, thermoplastic elastomer or the like is fixed and fixed to the adhesive applying section (2) in an expanded state. This elastic body (3) is fixed with four or more elastic bodies.
(3) is fixed in parallel to the length direction with a constant interval.
Further, in this case, the elastic body near the center of the adhesive application part (2)
By increasing the distance between the elastic body (3) on the central side and the elastic bodies (3) on both sides by reducing the distance between (3), it is possible to form a large rise.

Next, both sides of the sheet (1) are folded back to the front side as shown in FIG. 4 and laminated to cover the elastic body (3).
Then, the sheet (1) is cut in the lengthwise direction by a cutter or the like as shown by a broken line to form a pair of both side leak preventive pieces (4). In this embodiment, the two leak preventive pieces (4) are equipped with three elastic bodies (3) arranged in parallel on the folded side, and a fixed distance is provided from the folded elastic body (3). Through this, one elastic body (3) is attached to the overlapped end side.

Further, the pair of both side leak preventive pieces (4) are shown in FIG.
As shown in (3), the water-permeable top sheet (5) is placed in parallel on both sides with a body fluid absorbing space (6). This surface sheet
For (5), a perforated film, a non-woven fabric or the like can be used. In addition, the leak preventive pieces (4) on both sides are folded portions (7) of the leak preventive pieces (4) so that body fluid does not permeate from the overlapped end portions.
Is performed on the side of the bodily fluid absorption interval (6) as shown in FIG.

Then, the parallel elastic bodies (3) of the leak preventive pieces (4) on both sides are heat-welded and fixed to the surface sheet (5) through the fixing portions (10). Further, an adhesive or the like can be used for this fixing method. When fixed in this way, the leakproof pieces on both sides
(4) forms an inner gather (11) on the inner side of the fixed portion (10) and an outer gather (12) on the outer side of the fixed portion (10).

The leak preventive pieces (4) on both sides are the surface sheet (5).
The elastic body (3) on the bodily fluid absorption interval (6) side can be changed by changing the number of elastic bodies (3) or changing the expansion rate in the state of being fixed to
When the contracting force of is increased, the inclination of the inner gathers (11) toward the body fluid absorption interval (6) side can be reduced and the steep angle can be raised, making it easy to stop body fluids. Further, by raising the inner gathers (11) at a steep angle, the bodily fluid absorption interval (6) can be increased, and the bodily fluids can be smoothly absorbed into the absorbent layer (14) side.

Further, this surface sheet (5) is shown in FIGS.
As shown in (3), it is placed on the body fluid-absorbing absorbent layer (14) laminated on the leak-proof sheet (13). The absorbent layer (14) is made of cotton, pulp, absorbent polymer or the like.

Further, if the absorbing layer (14) is formed in parallel without forming a dented portion on both sides, the shape is simplified and simple molding is possible. Further, as shown in FIG. 11, the absorbing layer (14) can be formed into a gourd shape by forming a concave portion (21) on a part of both sides in the length direction. When formed in this way, a gourd-shaped neck part
The position of (21) coincides with the shape of the inner crotch, the absorbent layer (14) is less likely to be twisted, and side leakage is easily prevented.

A leak-proof sheet having an absorbent layer (14) laminated thereon
(13) is made of water impermeable polyethylene or the like.
As shown in FIG. 7, the leak-proof sheet (13) is coated with hot melt or the like on the outer surface side in the mounted state to form a fastening portion (15) to the inner surface of the shorts. (15)
It is covered with a release paper 16 coated with silicone or the like and peeled off until use.

Next, in the state where the leakproof sheet (13), the absorbent layer (14) and the surface sheet (5) are laminated, the surface sheet (5) and the leakproof sheet (5) protruding from the outer periphery of the absorbent layer (14). 1
3) is heat-welded and fixed, and a heat-welded portion (17) is formed on the outer periphery of the absorption layer (14) as shown in FIG.

Further, as shown in FIG. 9, the pair of double-sided leak preventive pieces (4) may have outer gathers (12) protruding to both sides of the absorbent layer (14), or may have outer gathers (12). Alternatively, as shown in FIG. 10, they may be located inside both sides of the absorbent layer (14).

Then, the outer gather (12) is connected to the absorption layer (1
If it protrudes to the outside of 4), this outside gather (12)
As shown in FIG. 8, the outer periphery of the absorbent layer (14) is heat-welded and fixed while being folded back toward the inner gather (11). In this case, the lengthwise ends of the leak preventive pieces (4) protruding from the absorbent layer (14) are not fixed by heat welding. When done in this way, the outer gathers (12) will have a surface sheet on the outside.
It is possible to stand up without sticking to (5).

Further, as shown in FIG. 10, the double-sided leak preventive piece (4) has the outer gather (12) when the outer gather (12) is located inward of both sides of the absorbent layer (14). Even if the outer periphery of the absorbent layer (14) is heat-welded and fixed without folding back, there is no risk that the outer side of the outer gather (12) will be fixed to the surface sheet (5), and the length of the leak preventive pieces (4) on both sides will not increase. Surface sheet (5)
At the same time, it can be fixed by heat welding.

Further, both ends and both sides of the heat-welded portion (17) are cut into a target shape along the two-dot chain line shown in FIG. Further, the heat-welding part (17) is provided with a part of both sides bulged outward, and the wing part folded back to the outer surface of the shorts.
(18) can be formed.

In the structure as described above, the leak preventive pieces (4) on both sides form the inner gathers (11) and the outer gathers (12), so that the elastic body (3) is contracted by the contracting force. , V-shaped on both sides of the surface sheet (5).

The body fluid discharged from the user is absorbed from the body fluid absorbing space (6) between the leak preventive pieces (4) to the side of the absorbent layer (14).

The leak preventive pieces (4) on both sides are inward gathers.
Between the (11) and the surface sheet (5), a pocket-shaped retention space (20) is formed as shown in FIG. Therefore, even when the body fluid has a surface tension or the like and easily rolls on the surface sheet (5), the body fluid is stopped by the inner gather (11) forming the pocket-shaped retention interval (20), Absorption layer
Absorb on the (14) side.

Further, the leak preventive pieces (4) on both sides are arranged at intervals of absorbing body fluid.
The outer gather (12) is raised on the side opposite to (6), and since this outer gather (12) does not cover the bodily fluid absorption interval (6), this outer gather (12) stands up. The rising height is not restricted, and the outside gathers stand up greatly
(12) adheres to the user's skin. Therefore, the outer gathers (12) stop the body fluid transmitted through the body of the user and prevent side leakage.

[0041]

EFFECTS OF THE INVENTION Since the present invention is constructed as described above, in absorbent articles such as sanitary napkins and sheets for exclusive use of a vaginal discharge, the absorbent articles are gathered on the inner side and on the outer side. By forming a gather, it rises in a V shape. Therefore, the leak-proof pieces on both sides stop the body fluid that easily rolls on the surface sheet and the body fluid that is transmitted to the body of the user. For this reason, compared to the conventional method of forming gathers on one of the inward and outward sides of the topsheet, the effect of preventing lateral leakage is high and hygienic mounting is possible. Also, the leak-proof pieces on both sides are
Since it is in close contact with the user's skin and the fit is improved, it is possible to wear it with a good feeling of use.

[Brief description of drawings]

FIG. 1 is a perspective view of an absorbent article showing a state in which leakproof pieces on both sides are raised by contraction of an elastic body.

FIG. 2 is an end view taken along the line AA of FIG.

FIG. 3 is a plan view showing a state in which a plurality of elastic bodies are placed in parallel on a sheet.

FIG. 4 is a plan view showing a state in which both sides of the sheet are folded back inward and laminated.

FIG. 5 is an enlarged cross-sectional view showing a state in which a pair of both side leak preventive pieces are fixed to both sides of the surface sheet via a body fluid absorbing space.

FIG. 6 is a plan view showing a state in which a surface sheet having both leak-proof pieces fixed thereon is placed on an absorbent layer and a leak-proof sheet.

FIG. 7 is an enlarged end view taken along line BB of FIG.

FIG. 8 is an enlarged end view of the absorbent article showing a state in which the outer gathers are folded back toward the inner gathers.

FIG. 9 is a plan view showing an expanded state of an absorbent article provided with two-sided leak-proof pieces protruding from the absorbent layer.

FIG. 10 is a plan view showing an expanded state of an absorbent article in which the leakproof pieces on both sides are located inward of the absorbent layer.

FIG. 11 is a plan view showing an expanded state of an absorbent article in which a cut portion is provided on both sides of an absorbent layer.

[Explanation of symbols]

 1 sheet 2 adhesive application part 3 elastic body 4 both sides leak preventive piece 5 surface sheet 6 bodily fluid absorption interval 13 leak preventive sheet 14 absorption layer 17 heat welded part 21 crimped part

Claims (8)

[Claims] 1. A pair of both-side leak-proofing pieces are formed by laminating a water-repellent or water-impermeable sheet and fixing a plurality of elastic bodies to the inner surface of the laminated portion in a stretched state in parallel in the lengthwise direction. , A pair of both side leak preventive pieces are located between both sides of a surface sheet having an absorbent layer interposed between the leak preventive sheet and a body fluid absorbing space, and between the two side leak preventive pieces, which are parallel to each other. Is fixed to the surface sheet, and the leakproof pieces on both sides are raised in a V shape on both sides of the surface sheet by the contraction force of the elastic body. 2. An adhesive is applied to the surface of a water-repellent or water-impermeable sheet, and four or more elastic bodies are stretched in parallel in the lengthwise direction at regular intervals in the adhesive-applied portion. After fixing and fixing, both sides of the sheet are folded back to the surface side to cover the elastic body, and then the center portion in the width direction of the folded sheet is cut in the length direction to keep two or more elastic bodies constant. Form a pair of both sides leak preventive pieces to be installed in parallel through the gap of, the both sides of the leak preventive piece, through the bodily fluid absorption interval on both sides of the surface sheet that should have an absorbent layer between the leak preventive sheet After fixing the space between the elastic bodies of the leakproof pieces on both sides of the absorbent sheet to start up in a V shape, after fixing the surface sheet and the leakproof sheet protruding from the outer periphery of the absorbent layer by heat welding, Absorbent article manufacturing method characterized in that both ends and both sides of the heat-welded portion are cut into a desired shape. Law. 3. The absorbent article according to claim 1, wherein the absorbent layer has narrow cut portions formed on both sides in the lengthwise direction. 4. The method for manufacturing an absorbent article according to claim 2, wherein the absorbent layer has narrow cut portions formed on a part of both sides in the length direction. 5. The absorbent article according to claim 1, wherein the absorbent layer is formed so that both sides thereof in the length direction are parallel to each other. 6. The method for manufacturing an absorbent article according to claim 2, wherein the absorbent layer is formed so that both sides thereof in the length direction are parallel to each other. 7. The absorbent article according to claim 1, wherein the elastic body of the leak preventive pieces on both sides has a strong contraction force on the side of the bodily fluid absorption interval in a state of being fixed to the surface sheet. 8. The absorbent article according to claim 2, wherein the elastic body of the leak preventive pieces on both sides has a strong contracting force on the side of the bodily fluid absorption interval in a state of being fixed to the surface sheet. Production method.