JPH10295721A - Absorbent articles - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide an absorbent article mainly capable of avoiding leakage from a rear portion in a favorable manner, and which does not reduce a feeling of wearing and does not adversely affect a wearer's skin. SOLUTION: A liquid-permeable top sheet 11, which is in contact with a wearer, a liquid-impermeable back layer 12, and the top sheet 1
An absorbent article 1 having a liquid-retentive absorbent layer 13 interposed between the topsheet 1 and the backside layer 12;
1 is folded at least in the rear part 1b of the absorbent article 1 to form a folded part 14 functioning as a leak-proof wall.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid-permeable top sheet to be in contact with a wearer, such as a sanitary napkin, a pad for incontinent persons, and a surgical pad, and a liquid-impermeable back layer. The present invention relates to an absorbent article having a liquid-retaining absorbent layer interposed between a topsheet and a backside layer, and more particularly, to an absorbent article that can favorably prevent leakage from a rear portion.

[0002]

2. Description of the Related Art Generally, as absorbent articles such as sanitary napkins, a liquid-permeable top sheet to be in contact with a wearer, a liquid-impermeable back layer,
Absorbent articles having a liquid-retentive absorbing layer interposed between the topsheet and the backside layer are well known. Such absorbent articles are required to be able to absorb and retain body fluids such as blood and urine without leakage.

[0003] As a technique for absorbing and retaining body fluids such as blood and urine without leakage, a conventional technique has been disclosed in Japanese Unexamined Utility Model Publication No. 7-243.
As described in JP-A-18, a water-repellent or non-water-permeable covering sheet is arranged on the peripheral edge of the skin contact surface, and an elastic band is fixed in an extended state in the length direction of the back surface of the covering sheet. BACKGROUND ART Absorbent articles and the like standing upright are known. However, the absorbent article as described above has a problem that the back leakage at the time of bedtime or the like cannot be sufficiently avoided. In addition, since the water-repellent or water-impermeable covering sheet is disposed on the skin contact surface, the feeling of wearing may not be good or the wearer's skin may be adversely affected. As a technique for avoiding back leakage, an absorbent article having a wide rear portion is known, but when the amount of liquid is large, back leakage may not be sufficiently avoided, and However, there are problems such as a poor fit feeling and a large amount of each member.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an absorbent article which can mainly prevent leakage from the rear part, and which does not reduce the feeling of wearing and does not adversely affect the wearer's skin. is there.

[0005]

According to the present invention, there is provided a liquid-permeable top sheet which is brought into contact with a wearer, a liquid-impermeable back layer, and an interposition between the top sheet and the back layer. An absorbent article having a liquid-retentive absorbent layer, wherein the topsheet is folded at least at a rear portion of the absorbent article to form a folded portion functioning as a leak-proof wall. The above object has been achieved by providing an absorbent article.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the absorbent article according to the present invention will be specifically described with reference to the drawings. here,
FIG. 1 is a perspective view showing a sanitary napkin as a first embodiment of the absorbent article of the present invention, and FIG. 2 is a cross-sectional view of the sanitary napkin of FIG. 1 taken along the line II.

[0007] The absorbent article (sanitary napkin) 1 of the present embodiment is a liquid-permeable topsheet 1 to be brought into contact with a wearer.
1. It has a back sheet 12 as a liquid-impermeable back layer, and an absorber 13 as a liquid-retentive absorbing layer interposed between the top sheet 11 and the back sheet 12.
Such a configuration is the same as in the related art.

In the sanitary napkin 1 of this embodiment, as shown in FIGS. 1 and 2, the topsheet 11 is folded at least at the rear portion 1b of the absorbent article 1 to prevent leakage. A folded portion 14 functioning as a wall is formed.

The sanitary napkin 1 of the present embodiment will be described in detail. The topsheet 11 is formed substantially vertically, and the rear portion 1b of the sanitary napkin 1
The sanitary napkin 1 is folded with the bent portion 11a positioned in the width direction, folded once to the center in the longitudinal direction, overlapped on the surface of the topsheet 11 on the absorber 13 side, and
The folded portion 14 is folded back toward b ′, and the folded portion 14 in which the topsheet 11 is laminated in three layers is formed. In the folded portion 14, the bent portion 11a is disposed on the rear end 1b 'side of the sanitary napkin 1, and in this state, the topsheet 1
1 and the back sheet 12 are adhered. Note that the folded portion in the present invention means a portion where the topsheet is laminated in three or more layers. In the sanitary napkin 1 of the present embodiment, the upper surface of the three-layered two-layer surface The sheet 11 functions as a leak-proof wall. In the sanitary napkin 1 of the present embodiment, the topsheet 11 is folded symmetrically with the rear part 1b at the front part 1a of the sanitary napkin 1, and a folded part 14 is also formed at the front part 1a. ing. The top sheet 11
As a forming material of, generally known materials can be used without any particular limitation.

The length L (see FIG. 1) of the folded portion 14 formed on the rear portion 1b in the longitudinal direction of the sanitary napkin 1 is preferably 1 to 5 cm. If it is less than 1 cm, the leakage prevention effect is reduced, and if it is more than 5 cm, the contact area with the wearer is large, and discomfort may be caused by the blocked body fluid. The height H (see FIG. 2) of the folded portion 14 from a portion other than the folded portion 14 is preferably 0.3 to 3 cm, more preferably 0.5 to 2 cm. 0.3cm
If it is less than 3 cm, the crimping force to the wearer is weak and it is difficult to obtain a sufficient leak-proof effect. If it exceeds 3 cm, the crimping force to the wearer is too large and the feeling of wearing tends to be reduced. The distance D (see FIG. 1) of the folded portion 14 from the rear end 1b ′ of the sanitary napkin 1 is:
Preferably it is 1 to 5 cm. If it is less than 1 cm, the function of drawing the blocked body fluid into the lower absorbent layer is reduced, and
If it exceeds cm, the leakage preventing effect at the end is weakened. In addition, if the specific numerical value of each said part in the sanitary napkin 1 of this embodiment is shown, the said length L of the said folded part 14 will be 2c.
m, the height H is 0.5 cm, and the distance D is 2 cm.

The values of the respective parts relating to the folded part 14 of the rear part 1b of the sanitary napkin 1 have been described above, but the values of the respective parts relating to the folded part 14 provided on the front part 1a of the sanitary napkin 1 of the present embodiment are described. The values (longitudinal length, height and distance from the tip 1a ') and their preferred numerical ranges are the same as for the rear fold 14.

The back sheet 12 and the absorber 13
Are each formed substantially vertically, and the top sheet 11 is disposed with the absorber 13 interposed between the top sheet 11 and the back sheet 12, and the side edges in the width direction thereof are on the side of the back sheet 12. And is bonded to the back sheet 12, and both ends in the longitudinal direction are bonded to the back sheet 12 by heat sealing as shown in FIGS.
As described above, the topsheet 11 and the backsheet 12 are adhered at the periphery of the absorber 13 to form the sanitary napkin 1 of the present embodiment. The side portion of the folded portion 14 is also wrapped around the back sheet 12 and fixed. As a material for forming the back sheet 12 and the absorber 13, a generally known material can be used without any particular limitation.

The sanitary napkin 1 of the present embodiment is mounted and used like a conventional sanitary napkin. In the sanitary napkin 1, the folded portion 14 (the upper two-layer surface sheet) slightly rises to serve as a leak-proof wall, and comes into contact with the wearer in the mounted state. Therefore, according to the sanitary napkin 1 of the present embodiment, both the bodily fluid that migrates backward on the surface of the sanitary napkin 1 and the bodily fluid that migrates along the body of the wearer are satisfactorily blocked and absorbed from the topsheet 11. Since absorption into the body 13 is promoted, leakage from the rear part 1b is well avoided. According to the sanitary napkin 1 of the present embodiment, since the entire surface of the skin contact surface is the topsheet 11, the feeling of wearing is not reduced and the wearer's skin is not adversely affected. According to the sanitary napkin 1 of the present embodiment, the folded portion 14 is also formed on the front portion 1a of the sanitary napkin 1, so that leakage from the front portion 1a can be avoided well.

FIG. 3 is a sectional view showing a sanitary napkin as a second embodiment of the absorbent article according to the present invention, and is a view corresponding to FIG. 2 in the first embodiment. still,
In the present embodiment, the same members as those in the first embodiment shown in FIGS. 1 and 2 are denoted by the same reference numerals, and description thereof will be omitted.

In the sanitary napkin 1 of the present embodiment, FIG.
As shown in FIG. 2, an absorbent sheet 13 'is used as the absorbent layer, and the absorbent sheet 13' is folded together with the top sheet 11, and the front part 1a and the rear part 1b have three layers of surface. The sheet 11 and the two layers of the absorbent sheet 13 ′ form a five-layer folded portion 14. As described above, the folded portion 14 may be formed from the top sheet and members other than the top sheet. In the sanitary napkin 1 of the present embodiment, the absorbent layer (absorbent sheet)
This is the same as the above-described first embodiment except that 13 ′ is folded together with the topsheet 11.

In the case where the absorbent layer is folded and the folded portion 14 is formed together with the topsheet 11 as in the present embodiment, the folded portion 14 is bent so as not to deteriorate the feeling of wearing. In addition, in order to stand up to such an extent that it comes into contact with the wearer at the time of wearing, it is preferable to include an absorbent sheet having a thickness of 0.3 to 3 mm, and to form the folded portion 14 by the absorbent sheet and the top sheet 11. In the present embodiment, the absorbing layer comprises only the absorbing sheet 13 '.

Examples of the absorbent sheet 13 'include sheets of absorbent paper, nonwoven fabric, pulp sheets in which fibers are sheeted with a binder or the like, fluff pulp, and sheets formed by mixing highly absorbent polymers with fibers. It is preferable to form a sheet by mixing a fiber with a highly absorbent polymer, from the viewpoint that processability and a good body fluid absorption amount can be obtained. In addition, as a sheet formed by mixing a superabsorbent polymer with a fiber, a sheet in which a superabsorbent polymer is dispersed between paper or nonwoven fabric, a mixture of a hydrophilic fiber, a superabsorbent polymer and a binder are used. Any of those formed into sheets may be used.

The preferred absorbent sheet 13 'includes:
The absorbent sheet 13 ′ is composed of a hydrophilic fiber and a hot-melt adhesive fiber or a paper-strength reinforcing agent, and a super-absorbent polymer. The superabsorbent polymer is dispersed and arranged inside the sheet, and is adhered and fixed to the hydrophilic fibers constituting the absorbent sheet 13 ′. The spraying basis weight of the superabsorbent polymer is 5 to 300 g / m ² , A high-absorbency sheet in which the thickness of the absorbent sheet is 0.3 to 1.5 mm is exemplified.
Further, as the more preferable absorbent sheet 13 ', a fiber structure formed of bulky hydrophilic fibers and hot-melt adhesive fibers or a paper reinforcing agent and superabsorbent polymer particles are used. The absorbent polymer particles are not present on the absorbent surface where the absorbent sheet 13 ′ absorbs the liquid, but are dispersed and fixed in the fibrous structure, and the spray basis weight of the highly absorbent polymer is 10 to 70 g / m ^2. And a high absorption sheet in which the thickness of the absorption sheet 13 'is 0.3 to 1.5 mm.

In such a superabsorbent sheet, since the superabsorbent polymer is three-dimensionally dispersed and fixed in one sheet, the absorbing ability of the superabsorbent polymer is effectively exhibited, Further, since gel blocking of the polymer is small, the body fluid can be easily transmitted through the absorbent sheet, and high absorbency can be obtained.

According to the sanitary napkin 1 of the present embodiment, the same operation and effect as those of the sanitary napkin 1 of the first embodiment can be obtained. In particular, according to the sanitary napkin 1 of the present embodiment, since the folded portion 14 is provided with the absorbent layer (absorbing sheet) 13 ′, the bodily fluid flows through the folded portion 1.
4, and the leakage from the rear part 1b and the front part 1a is further effectively avoided.

FIG. 4 is a sectional view showing a sanitary napkin as a third embodiment of the absorbent article according to the present invention, and is a view corresponding to FIG. 2 in the first embodiment. still,
In the present embodiment, the same members as those in the first embodiment shown in FIGS. 1 and 2 are denoted by the same reference numerals, and description thereof will be omitted.

In the sanitary napkin 1 of this embodiment, FIG.
As shown in the figure, a leak-proof sheet 15 is interposed between the topsheet 11 and the absorbent layer 13 at a rear portion of the sanitary napkin 1, and the leak-proof sheet 15 is provided together with the topsheet 11. It is folded to form the folded portion 14. In the sanitary napkin 1 of the present embodiment, the leak-proof sheet 15 is disposed and the leak-proof sheet 1 is disposed.
5 is the same as the above-described first embodiment, except that the top sheet 11 and the top sheet 11 form the folded portion 14.

The leak-proof sheet 15 is arranged from the front and rear edges of the sanitary napkin 1 to the bent portion 11 a of the topsheet 11. As the leak-proof sheet 15, a generally known one such as a polyethylene film or a polypropylene film can be used without any particular limitation.

According to the sanitary napkin 1 of this embodiment, the same operation and effect as those of the sanitary napkin of the first embodiment can be obtained. In particular, according to the sanitary napkin 1 of the present embodiment, the leak-proof sheet 1
5 are arranged, so that each of the folded portions 14
The transfer of the bodily fluid to the a side or the rear end 1b side is more reliably prevented, and leakage of the bodily fluid in the front part and the rear part can be more favorably avoided.

FIG. 5 is a sectional view showing a sanitary napkin as a fourth embodiment of the absorbent article according to the present invention, and is a view corresponding to FIG. 2 in the first embodiment. still,
In the present embodiment, the same members as those in the first embodiment shown in FIGS. 1 and 2 are denoted by the same reference numerals, and description thereof will be omitted.

In the sanitary napkin 1 of this embodiment, FIG.
As shown in the figure, the topsheet 11 is folded once toward the center in the longitudinal direction, overlapped on the surface of the topsheet 11 opposite to the absorber 13, and further folded toward the edge.
The bent portion 11a is arranged at the center in the longitudinal direction in the folded portion 14, and the top sheet 11 and the back sheet 12 are bonded in this state. In the sanitary napkin 1 of the present embodiment, each folded portion 14 has a length L ′.
Is 1 to 5 cm, and the distance D 'of the bent portion 11a from the edge (front end 1a' or rear end 1b ') of the sanitary napkin 1 is 1 to 5 cm.

With the sanitary napkin 1 of the present embodiment, the same functions and effects as those of the first embodiment can be obtained.

The present invention is not limited to the above-described embodiment, and specific shapes and dimensions of each member can be appropriately changed without departing from the gist of the present invention.
For example, by providing the elastic member 21 in the sanitary napkin 1 of each of the above embodiments, the leakage preventing effect of the folded portion 14 may be improved. As such an example, FIGS. 6 to 8 show examples in which the elastic member 21 is provided on the sanitary napkin 1 of the first embodiment. In FIG. 6, an elastic member 21 is provided along a side edge portion of the sanitary napkin 1, and the entire length of the sanitary napkin 1 is curved in the longitudinal direction. In FIG. 7, an elastic member 21 is provided along the side edge of the folded portion 14 of the sanitary napkin 1 so that the folded portion 14 stands upright. In FIG. 8, the sanitary napkin 1
The elastic member 21 extends along the bent portion 11a of the folded portion 14 of FIG.
Is provided to bend the folded portion 14 in the width direction.

The sanitary napkin 1 of each of the above embodiments
By providing the groove 31, the leakage preventing effect of the folded portion 14 may be assisted. As such an example, FIGS. 9 to 11 show examples in which the groove 31 is provided in the sanitary napkin 1 of the first embodiment. In FIG. 9, a groove 31 is provided in the folded portion 14 in the longitudinal direction from the surface on the absorber 13 side, and as shown in FIG.
It is held in a state of being lifted up to the skin contact surface side in a letter shape to improve the fit to the wearer. In FIG. 11, a groove 31 is provided in the width direction in front of the folded portion 14 so that the groove 31 is formed.
Thereby, the transfer of the body fluid in the longitudinal direction is prevented together with the folded portion 14. In each of the above embodiments, the folded portion 14 is not provided on the front portion 1a but the rear portion 1b is provided.
Even if it is only provided, leakage of the rear part 1b can be avoided well. In each of the above embodiments, the folded portion 14
In this case, the surface sheet 11 and the absorbing layer (absorbing sheet) 13 ′ may be formed by bending a larger number of times to form a multilayer.

In each of the above embodiments, the folded portion 14
Is not limited to the above-described embodiment. For example, as shown in FIG. 12, the topsheet 11 is folded with the two bent portions 11a 'and 11a' positioned in the width direction of the sanitary napkin 1. The folded portion 14 may be formed by overlapping. Also in this case, such a folded portion 14 may be provided only in the rear portion 11b, or may be provided in the rear portion 11b and the front portion.

In the second embodiment shown in FIG. 4, the absorbing layer 13 may include an absorber together with the absorbing sheet 13 '. In this case, the folded portion 14 is preferably formed by folding only the absorbent sheet and the top sheet, and the absorber is preferably not formed with the folded portion 14. In each of the above embodiments, the absorbing layer 13 and the back surface layer 12 may be integrally formed. In each of the above embodiments, the vicinity of the rear portion 1b may be formed wider to increase the absorption capacity so that leakage from the rear end 1b 'can be more reliably prevented. In each of the above embodiments, a sanitary napkin having a wing may be provided by extending the top sheet 11 and the back sheet 12 from the center in the longitudinal direction. In the above embodiment, the case of the sanitary napkin has been described. However, the same effect can be obtained with other absorbent articles such as incontinence pads and surgical pads.

[0032]

As described above, according to the absorbent article of the present invention, leakage from the rear part is well avoided, the feeling of wearing is not reduced, and no adverse effect on the wearer's skin occurs.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a sanitary napkin as a first embodiment of an absorbent article according to the present invention.

FIG. 2 is a cross-sectional view of the sanitary napkin of FIG. 1 taken along the line II.

FIG. 3 is a sectional view showing a sanitary napkin as a second embodiment of the absorbent article according to the present invention, and is a view corresponding to FIG. 2 in the first embodiment.

FIG. 4 is a sectional view showing a sanitary napkin as a third embodiment of the absorbent article according to the present invention, and is a view corresponding to FIG. 2 in the first embodiment.

FIG. 5 is a sectional view showing a sanitary napkin as a fourth embodiment of the absorbent article according to the present invention, and is a view corresponding to FIG. 2 in the first embodiment.

FIG. 6 is a plan view showing a sanitary napkin as another embodiment of the absorbent article according to the present invention.

FIG. 7 is a plan view showing a sanitary napkin as another embodiment of the absorbent article according to the present invention.

FIG. 8 is a plan view showing a sanitary napkin as another embodiment of the absorbent article according to the present invention.

FIG. 9 is a plan view showing a sanitary napkin as another embodiment of the absorbent article according to the present invention.

FIG. 10 is a side view of the sanitary napkin of FIG. 9 as viewed from the direction of the arrow in FIG. 9;

FIG. 11 is a plan view showing a sanitary napkin as another embodiment of the absorbent article according to the present invention.

FIG. 12 is a cross-sectional view showing a sanitary napkin as another embodiment of the absorbent article according to the present invention, and is a view corresponding to FIG. 2 in the first embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Sanitary napkin 1a Front part 1a 'front end 1b rear part 1b' rear end 11 Surface sheet 11a Bent part 12 Back sheet (back layer) 13 Absorbent (absorbing layer) 13 'Absorbing sheet (absorbing layer) 14 Folding part 15 Leakproof sheet 21 Elastic member 31 Groove

Claims (3)

[Claims] 1. A liquid-permeable top sheet that is in contact with a wearer, a liquid-impermeable back layer, and a liquid-retentive absorbing layer interposed between the top sheet and the back layer. In the absorbent article, the top sheet is folded at least at a rear portion of the absorbent article to form a folded portion functioning as a leak-proof wall. 2. The absorbent article according to claim 1, wherein the absorbent layer is folded together with the topsheet to form the folded portion. 3. A leakproof sheet is interposed between the topsheet and the absorbent layer at a rear portion of the absorbent article, and the leakproof sheet is folded together with the topsheet to form the folded portion. The absorbent article according to claim 1, wherein the absorbent article is formed.