JP2538253Y2 - Sanitary napkin - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION INDUSTRIAL APPLICABILITY The present invention relates to a sanitary napkin, which aims to enhance the absorption capacity of the napkin to obtain a smooth feel and prevent side leakage. is there.

2. Description of the Related Art Conventionally, sanitary napkins have a smaller area than a surface sheet and a leak-proof sheet between a water-permeable top sheet and a non-water-permeable leak-proof sheet for the purpose of gelling absorbed menstrual blood. And a thick absorbent layer made of pulp and a body fluid-absorbing polymer sheet.

The purpose of this conventional napkin is to absorb menstrual blood flowing out of the menstrual blood outflow part of the wearer with the absorbent layer and gel it with the polymer sheet.

However, in the above-mentioned conventional product, menstrual blood in contact with the topsheet is not quickly absorbed by the absorbent layer and the polymer sheet, and menstrual blood temporarily stays between the topsheet and the absorbent layer, causing a backflow. Or the like, the feeling of use is deteriorated.

In addition, because the absorption capacity of the polymer sheet is low and menstrual blood cannot be sufficiently absorbed, rapid absorption of menstrual blood is not performed,
Menstrual blood was diffused in the outer peripheral direction, and side leakage was likely to occur.

Problems to be Solved by the Invention The present invention is to solve the problems as described above, and the menstrual blood flowing out of the body of the wearer is not retained or refluxed, and is applied to the sanitary napkin. It is intended to absorb the blood quickly, prevent side leakage due to the diffusion of menstrual blood, and provide the wearer with a smooth feeling of use.

Means for Solving the Problems According to the present invention, in order to solve the problems as described above, a body fluid absorption having a smaller area than the surface sheet and the leak-proof sheet is provided between the water-permeable top sheet and the water-impermeable leak-proof sheet. When a waterproof polymer sheet is interposed, both sides of the leak-proof sheet are folded back on both sides of the topsheet to form side-leakage prevention pieces, which are fixed to the surface of the topsheet and between the sheet and the polymer sheet, the liquid permeability nonwoven fabric constituting the composite fibers produced by coating the surfaces of polypropylene with polyethylene at 50 wt% or more of the outer sheet to form a position as basis weight ^{8g / m 2 ~15g / m 2} , the 20 wt% rayon on the polymer sheet side of the outer sheet
% Hydrophilic fibers constituting at least, a basis weight ^{18g / m 2 ~40g / m 2} , which the intermediate sheet is formed located in a water needling process hydrophilic nonwoven fabric, a polymer sheet side of the intermediate sheet, the pulp 90wt /
% Hydrophilic fibers constituting at least, the inner sheet is formed position by nonwoven having spots absorbent and basis weight ^{30g / m 2 ~50g / m 2} , of the inner sheet to the polymer sheet side, of the polymer and the pulp An absorbent sheet made of a mixture is formed narrower than a polymer sheet.

Further, the absorbent sheet body, and the pulp layer of ^{30g / m 2 ~150g / m 2} , between the absorbent paper ^{13g / m 2 ~30g / m 2} , 10g / m 2 ~150g / m
It may be formed by laminating ^two polymers.

In addition, the absorbent sheet body has a width of 30 mm to 50 mm and a thickness of 1 mm to 5 m
m and a length of 80 mm to 150 mm.

In addition, the absorbent sheet body has one end located on the abdomen side and the other end located on the abdomen side of the polymer sheet formed at an interval of 15 mm to 80 mm, and the interval between both side edges and both side edges of the polymer sheet is 5 mm to It may be formed in 100 mm.

 Further, the absorbent sheet body may have a three-fold structure.

Further, the absorbent sheet may be formed in a flat shape without being folded.

Operation Since the present invention is configured as described above, when the napkin is worn on a local part of the wearer, the widthwise central portion of the napkin can be positioned at the outflow portion of menstrual blood.

The menstrual blood flowing out of the outlet flows through the topsheet and comes into contact with the outer sheet located on the inner surface of the topsheet. The outer sheet is made of a liquid-pervious nonwoven fabric composed of 50 wt /% or more of composite fibers in which the surface of polypropylene is coated with polyeletin, and the basis weight of this liquid-pervious nonwoven fabric is 8 g / m ^2.
It is the ~15g / m ^2. When formed in this manner, the outer sheet has a rough formation, has almost no absorbency, and has only liquid permeability. Therefore, the outer sheet does not accumulate menstrual blood, prevents backflow due to the accumulation of menstrual blood, and allows the menstrual blood to flow quickly to the intermediate sheet.

In addition, the liquid permeability of the outer sheet becomes poor if the composite fiber in which the surface of polypropylene is coated with polyeletin is less than 50 wt%. The outer sheet, if it is less than the basis weight is in the 8 g / m ^2, there is no effect of preventing wet-back,
^{On the other hand} , if it is more than 15 g / m ² , it will be noble and liquid permeability will be poor.

In addition, menstrual blood that has passed through the outer sheet comes into contact with an intermediate sheet located on the polymer sheet side of the outer sheet. This intermediate sheet uses a hydrophilic fiber composed of rayon at 20 wt /% or more, and has a basis weight of the hydrophilic nonwoven fabric of 18 g / m ² to 40 g / m ^2.
g / m ² , with small holes formed by water needling. For this reason, the intermediate sheet has higher hydrophilicity than the outer sheet, and enables quick suction of menstrual blood from the outer sheet. Even when menstrual blood is viscous, the intermediate sheet has small holes formed by water needling, so that menstrual blood can be passed through these small holes.
For this reason, it is difficult to cause a liquid passage failure due to clogging of menstrual blood and the like, and it becomes possible to pass the menstrual blood through the intermediate sheet.

If the rayon is less than 20% by weight, the liquid permeability of the intermediate sheet is poor. The intermediate sheet has a basis weight of 18
If less than g / m ^2, worsened feel is transmitted feeling of the laminate below with liquid permeability is deteriorated, and when it is more than 40 g / m ^2, the liquid permeability with wetback is often Deteriorate.

The menstrual blood that has passed through the intermediate sheet contacts the inner sheet located on the polymer sheet side of the intermediate sheet.
The inner sheet is made of a hydrophilic non-woven fabric composed of 90% by weight or more of pulp, and the basis weight of the hydrophilic non-woven fabric is 30 g / m ² or more.
It is set to 50g / m ^2. The inner sheet thus formed is
Higher spot absorption than outer sheet and intermediate sheet,
Menstrual blood that has passed through the intermediate sheet can be quickly absorbed. Further, since the inner sheet that has absorbed the menstrual blood has spot absorbability, the menstrual blood hardly diffuses in the outer peripheral direction, and absorbs the menstrual blood only in the polymer sheet direction.

If the pulp is less than 90% by weight, the inner sheet loses its spot absorbability. The inner sheet, if it is less than a basis weight to 30g / m ^2, there is no soft feeling, also
If it is more than 50 g / m ² , the higher the viscosity of the bodily fluid, the lower the fluid permeability, and the more likely it is to cause fluid impediment.

Also, menstrual blood that has passed through the inner sheet comes into contact with the absorbent sheet located on the polymer sheet side of the inner sheet. This absorbent sheet is formed of a mixture of a high-molecular polymer having sufficient adsorption capacity and pulp.

Therefore, the menstrual blood that has passed through the inner sheet is instantaneously absorbed by the absorbent sheet and gelled by the polymer, so that the menstrual blood does not diffuse in the outer peripheral direction, and lateral leakage due to the diffusion of menstrual blood can be prevented. In addition, menstrual blood absorbed by the absorbent sheet body gels with instantaneous absorption and does not flow back in the direction of the inner sheet, so it does not give the wearer's local feeling of dampness and is used smoothly It is possible to provide a feeling.

In addition, the absorbent sheet body can have a sufficient absorbing ability due to its structure, and if provided in correspondence with the menstrual blood outflow portion of the wearer, menstrual blood is almost diffused to other portions than the corresponding portion. It is possible to prevent lateral leakage.

In addition, since the polymer sheet is provided on the inner surface side of the absorbent sheet body, the outflow of menstrual blood is large, and even when the menstrual blood cannot be completely absorbed by the absorbent sheet alone, it is wider than the absorbent sheet body. Polymer sheet absorbs menstrual blood, and enables reliable menstrual blood absorption.

In addition, if the lateral leakage prevention piece is formed, even if menstrual blood flows out of the absorbent sheet body beyond the absorption capacity and spreads in the width direction of the napkin, the lateral leakage prevention piece fixed to both surfaces of the topsheet can be used. Prevents side leakage of menstrual blood and allows for sanitary mounting.

Further, the absorbent sheet, and the pulp layer of ^{30g / m 2 ~150g / m 2} , between the absorbent paper ^{13g / m 2 ~30g / m 2} , 10g / m 2 ~150g / m
^{If the two} polymers are formed by lamination, they can have an appropriate thickness and absorbency. The absorbent sheet body, forming pulp layer less than 30 g / m ^2, resulting insufficient rigidity of the sheet, also be formed in many pulp layer than 150 g / m ^2, prone to discomfort too thick. The absorbent sheet body, using absorbent paper less than 13 g / m ^2, the absorption is insufficient, also 30
If the absorbent paper is used in an amount of more than g / m ^{2, the} paper becomes thick and uncomfortable. In addition, if the absorbent sheet is formed of a polymer of less than 10 g / m ² , the absorption becomes insufficient, and if a polymer layer of more than 150 g / m ² is formed on the absorbent paper, the absorbent sheet becomes hard and easily discomfort.

In addition, the absorbent sheet body, width 30mm ~ 50mm, thickness 1mm ~ 5m
m, length 80mm-150mm, the absorbent sheet can be formed in conformity with the shape of the body fluid outflow part of the wearer, and the downsizing of the absorbent sheet enables production at low cost and rapid absorption of body fluid. It becomes possible. Further, if the absorbent sheet is formed with a width of less than 30 mm, the outflow portion of the bodily fluid protrudes and cannot be covered, and if the width is larger than 50 mm, motility is hindered and discomfort is easily caused. Further, if the absorbent sheet body is formed with a thickness of less than 1 mm, the absorbing power will be lost, and if the thickness is greater than 3 mm, the feeling of wearing will be poor. In addition, if the length of the absorbent sheet is less than 80 mm, it will not be possible to cover the outflow portion of bodily fluids, and if the length is more than 150 mm, discomfort will easily occur.

Further, the absorbent sheet body is formed such that one end located on the abdomen side and one end located on the abdomen side of the polymer sheet are formed with an interval of 15 mm to 80 mm, and the interval between both side edges and both side edges of the polymer sheet is 5 mm. When the length is formed to be about 100 mm, the absorbent sheet body can be made to correspond to the menstrual blood outflow portion of the wearer, so that menstrual blood can be absorbed accurately and quickly, and good wearing becomes possible. If the distance between the absorbent sheet and one end located on the abdomen side of the polymer sheet is smaller than 15 mm, the rear side of the menstrual blood outflow portion protrudes from the absorbent sheet and cannot be covered. Further, if the distance between the absorbent sheet body and one end located on the abdomen side of the polymer sheet is larger than 80 mm, the front side of the outflow portion of menstrual blood protrudes and cannot be covered. If the distance between the side edges of the polymer sheet is less than 5 mm, the width of the absorbent sheet becomes wider, and the feeling of wearing becomes worse. If the distance between the absorbent sheet body and both side edges of the polymer sheet is larger than 100 mm, both sides of the outflow portion of menstrual blood will protrude and cannot be covered.

Also, if the absorbent sheet body has a three-fold structure,
Even if the sheet is thinner than 0.5 mm, it is possible to form the absorbent sheet body by folding back, and it is possible to manufacture the absorbent sheet body more simply and inexpensively than in the case where the absorbent sheet body is formed thick without folding back.

Further, if the absorbent sheet is formed in a flat shape without being folded, although the manufacturing cost of the absorbent sheet is slightly increased, it becomes possible to absorb the body fluids reliably.

An embodiment of the present invention will be described below with reference to the drawings.
(1) is a body fluid absorbing polymer sheet, and on the back side,
As shown in FIG. 1, a water-impermeable leakproof sheet (2) wider than the polymer sheet (1) is formed. The leakproof sheet (2) is formed by laminating a waterproof polyethylene film on both sides of an absorbent sheet. Also,
Further, the outer surface of the leak-proof sheet (2) is coated with a water-repellent nonwoven covering sheet (3) wider than the leak-proof sheet (2).
To improve the feeling of contact with the skin. Further, on the outer surface of the covering sheet (3), an adhesive portion (4) for attaching to the inner surface of the shorts is provided. The sticking portion (4) is covered with a release paper (5) which is peeled off during use.

Further, the surface of the polymer sheet (1) is covered with a water-permeable surface sheet (6) wider than the polymer sheet (1). The topsheet (6) is formed of a polyethylene film or the like provided with small holes to make menstrual blood permeation good. Further, an outer peripheral flap (9) composed of the topsheet (6), the leak-proof sheet (2) and the covering sheet (3) protrudes to the outer periphery of the polymer sheet (1) and is folded back toward the topsheet (6). A lateral leakage prevention piece (7) is formed on both sides of the covering sheet (3), and the lateral leakage prevention piece (7) is formed.
Are fixed to both surfaces of the topsheet (6).

Further, although the cover sheet (3) is used for the lateral leakage prevention piece (7), the cover sheet (3) does not necessarily need to be used. In this case, instead of the covering sheet (3), both sides of the leak-proof sheet (2) are folded back toward the top sheet (6) to form a lateral leak-preventing piece (7). It is also possible to fix the side leakage preventing pieces (7) to both side surfaces of the topsheet (6).

An outer sheet (8) is located on the inner side of the top sheet (6). The outer sheet (8) is made of a liquid-permeable non-woven fabric composed of preferably 90% by weight or more of a composite fiber having a polypropylene surface coated with polyethylene, having a joint of 8 g / m ^{2 to} 15 g / m ² and a thickness of 0.1 g / m ² . It is formed with a thickness of 0.2 mm to 0.2 mm.

Further, the polymer sheet (1) of the outer sheet (8)
On the side is located the intermediate sheet (10). The intermediate sheet (10) is made of hydrophilic fibers composed of 20 wt% or more of rayon, to form a basis weight in the ^{18g / m 2 ~40g / m 2} , which is provided with comforter needling process to small holes I have.

Also, the polymer sheet (1) of the intermediate sheet (10)
On the side is located the inner seat (11). The inner sheet (11) is made of a hydrophilic fiber composed of 90% by weight or more of pulp, and has a basis weight of 30 g / m ^{2 to} 50 g / m ² and a thickness of 0.8 mm to 1.0 g.
By forming in mm, spot absorption performance is provided. Further, since the inner sheet (11) is formed to have a high basis weight and a large thickness, the inner sheet (11) can also have a function of concealing menstrual blood flowing through the polymer sheet (1).

Also, the polymer sheet (1) of the inner sheet (11)
On the side, an absorbent sheet (12) narrower than the polymer sheet (1) is formed. This absorbent sheet body (12)
As shown in FIG. 3, a hydrophilic sheet (13), a pulp layer (14) located on the inner surface side of the hydrophilic sheet (13), and a polymer layer (15) located on the inner surface side of the pulp layer (14). )
And are laminated. And hydrophilic sheet (13)
Are formed from hydrophilic fibers such as rayon.

Pulp layer (14) is formed by pulp ^{30g / m 2 ~150g / m 2} . This pulp layer (14)
10 g / m ^{2 to} 150 g / m2 between g / m ^{2 to} 30 g / m ² of absorbent paper (16)
Forming ² polymers. And this absorbent sheet body (12) is formed by folding it back into three, having a width of 30 mm to 50 mm,
It is formed with a thickness of 1 mm to 5 mm and a length of 80 mm to 150 mm.

In addition, the absorbent sheet body (12) has one end located on the abdomen side formed with a placement interval (19) in the length direction of 15 mm to 80 mm with one end located on the abdomen side of the polymer sheet (1). The absorbent sheet body (12) has a width-wise mounting interval (20) between both side edges and the side edges of the polymer sheet (1) of 5 mm to 100 mm.
mm.

In the product of the embodiment of the present invention thus formed, the thickness of the portion corresponding to the menstrual blood outflow portion is 4.0 mm to 4.5 mm, and the outer peripheral thickness of the corresponding portion is 2.0 mm to 2.5 mm.

Further, (17) in the drawing is a fastening portion provided by applying an adhesive such as hot melt.

In the above configuration, to attach the napkin (18), an adhesive portion (4) provided on the outer surface of the covering sheet (3) is attached to the inner surface of the shorts lowered to the inseam, By pulling up the shorts with the napkin (18) attached, the center of the napkin (18) in the width direction can be located at the outflow portion of menstrual blood.

The menstrual blood flowing out of the outlet flows through the topsheet (6) and comes into contact with the outer sheet (8) located on the inner surface of the topsheet (6). The outer sheet (8) has a rough texture, has almost no absorbency, and has only liquid permeability. For this reason, the outer sheet (8) does not accumulate menstrual blood, prevents backflow due to accumulating menstrual blood, and allows the menstrual blood to flow quickly to the intermediate sheet (10).

The menstrual blood that has passed through the outer sheet (8) comes into contact with the intermediate sheet (10). This intermediate sheet (10)
Because it is more hydrophilic than the outer sheet (8),
It allows quick suction of menstrual blood from the outer sheet (8). Even when menstrual blood is viscous, the intermediate sheet (10) has small holes formed by water needling, so that menstrual blood can be passed through these small holes. For this reason, it is unlikely that a fluid flow obstruction due to clogging of menstrual blood or the like will occur, and it becomes possible for the intermediate sheet (10) to have good menstrual blood flow.

The menstrual blood that has passed through the intermediate sheet (10) comes into contact with the inner sheet (11). The inner sheet (11) has higher spot absorbency than the outer sheet (8) and the intermediate sheet (10), and can quickly absorb menstrual blood that has passed through the intermediate sheet (10). Further, since the inner sheet (11) having absorbed the menstrual blood has spot absorbability, the menstrual blood hardly diffuses in the outer peripheral direction, and absorbs the menstrual blood only in the direction of the polymer sheet (1).

The menstrual blood that has passed through the inner sheet (11) comes into contact with the absorbent sheet (12). Since the absorbent sheet (12) is formed of a laminate of a high-molecular polymer and pulp or the like, it is possible to have a sufficient absorption capacity.

Therefore, the menstrual blood that has passed through the inner sheet (11) is instantaneously absorbed by the absorbent sheet body (12) and gelled with a polymer, so that the menstrual blood does not diffuse in the outer peripheral direction, and lateral leakage due to the diffusion of menstrual blood occurs. Can be prevented. Also, menstrual blood absorbed by the absorbent sheet body (12) gels with instantaneous absorption and does not flow back in the direction of the inner sheet (11). And a smooth feeling of use can be provided.

In addition, the absorbent sheet body (12) can have a sufficient absorption capacity due to its structure, and if provided in correspondence with the menstrual blood outflow part of the wearer, menstrual blood will be provided in other parts than the corresponding part. Almost no diffusion occurs, and lateral leakage can be prevented.

Further, if the polymer sheet (1) is used, a large amount of menstrual blood flows out, and even if the menstrual blood alone cannot be absorbed by the absorbent sheet body (12) alone, a polymer wider than the absorbent sheet body (12) can be used. The sheet (12) absorbs menstrual blood, and enables reliable menstrual blood absorption.

In addition, if the side leakage prevention piece (7) is formed, menstrual blood flows out of the absorbent sheet body (12) beyond the absorption capacity and spreads in the width direction of the napkin (18). )
The side leakage prevention pieces (7) fixed to both side surfaces of the 防止 prevent side leakage of menstrual blood, and can be mounted hygienically.

Further, in the above embodiment, the absorbing sheet body (12) has a three-fold structure, but in a different embodiment, the absorbing sheet body (12) is formed in a flat plate shape without being folded. Although the manufacturing cost of the sheet body (12) is slightly increased, it is possible to reliably absorb body fluid.

Effect of the Invention Since the present invention is configured as described above, the outer sheet does not accumulate menstrual blood, and allows the liquid to flow quickly to the intermediate sheet. And the intermediate sheet is highly hydrophilic,
Since the small holes are provided, the blood permeability of menstrual blood is improved, clogging is eliminated, and menstrual blood is rapidly passed through the inner sheet.
And the inner sheet has high spot absorbency, does not diffuse menstrual blood in the outer peripheral direction, absorbs menstrual blood only in the direction of the absorbent sheet body, prevents side leakage and eliminates stuffiness, and obtains a smooth feeling of use Can be.

In addition, since the absorbent sheet is composed of a mixture of high-molecular polymer and pulp, menstrual blood that has passed through the inner sheet is instantaneously absorbed and gelled, preventing lateral leakage and gelling and flowing backward. Therefore, it is possible to provide a smooth feeling of use to the local part of the wearer.

In addition, when the amount of outflow of menstrual blood is large and menstrual blood cannot be absorbed by the absorbent sheet alone, the polymer sheet wider than the absorbent sheet body absorbs menstrual blood in a supplementary manner, ensuring reliable menstrual blood absorption. Becomes possible.

Also, even in the event that menstrual blood is diffused in the width direction, the lateral leakage prevention pieces fixed to both side surfaces of the top sheet prevent lateral leakage of menstrual blood, enabling sanitary mounting. .

[Brief description of the drawings]

1 is an enlarged sectional view, FIG. 2 is a plan view, and FIG. 3 is an enlarged sectional view of an absorbent sheet body. (1) polymer sheet, (2) leak-proof sheet (6) top sheet, (7) side-leakage prevention piece (8) outer sheet, (10) intermediate sheet (11) ) Inner sheet, (12) Absorbent sheet (16) Absorbent paper

Claims (6)

(57) [Scope of request for utility model registration] 1. A sheet having a body fluid-absorbing polymer sheet having a smaller area than the surface sheet and the leak-proof sheet is interposed between the water-permeable top sheet and the water-impermeable leak-proof sheet. Both sides of the leakage sheet are folded back on both sides of the topsheet to form side leakage prevention pieces, and this side leakage prevention piece is fixed to the surface of the topsheet, and the surface of polypropylene is placed between the topsheet and the polymer sheet. in the coated liquid permeability nonwoven fabric composed of conjugate fibers 50 wt% or more of the outer sheet to form a position as basis weight ^{8g / m 2 ~15g / m 2} , the polymer sheet side of the outer sheet, rayon 20 wt%
The hydrophilic fibers constituting at least, a basis weight ^{18g / m 2 ~40g / m 2} , which the intermediate sheet is formed located in a water needling process hydrophilic nonwoven fabric, a polymer sheet side of the intermediate sheet, pulp 90wt % hydrophilic fibers constituting at least an inner sheet formation position by a nonwoven fabric having spots absorbent and basis weight ^{30g / m 2 ~50g / m 2} , the polymer sheet side of the inner sheet, a mixture of the polymer and the pulp A sanitary napkin characterized in that the absorbent sheet body made of is formed narrower than the polymer sheet. 2. The absorbent sheet body, and the pulp layer of ^{30g / m 2 ~150g / m 2} , between the absorbent paper ^{13g / m 2 ~30g / m 2} , 10g / m 2 ~15
Characterized by being formed by laminating 0 g / m ² polymer,
The sanitary napkin according to claim 1. 3. The absorbent sheet body has a width of 30 mm to 50 mm and a thickness of 1 mm.
The sanitary napkin according to claim 1, wherein the sanitary napkin is formed to have a length of about 5 mm and a length of about 80 mm to 150 mm. 4. The absorbent sheet body has one end located on the abdomen side and one end located on the abdomen side of the polymer sheet having a length of 15 mm to 80 mm.
2. The sanitary napkin according to claim 1, wherein the sanitary napkin is formed at a distance of 5 mm and a distance between both side edges of the polymer sheet is 5 mm to 100 mm. 5. The sanitary napkin according to claim 1, wherein the absorbent sheet has a three-fold structure. 6. The sanitary napkin according to claim 1, wherein the absorbent sheet is formed in a flat shape without being folded.