JP2576149Y2 - Sanitary napkin - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sanitary napkin, which aims to prevent body fluid from leaking sideways when worn and to obtain a good feeling of use.

[0002]

2. Description of the Related Art Conventionally, a sanitary napkin has one or more thread-like elastic bodies stretched on both sides of a napkin body in a stretched state so as to prevent lateral leakage of body fluid in a mounted state. There is one that attempts to form a napkin three-dimensionally by utilizing the restoring contraction force of this elastic body.

[0003]

However, since the conventional napkin uses a thin thread-like elastic body, in manufacturing, the elastic body is cut in an attempt to expand the elastic body.
There was a drawback that the contraction force could not be obtained or the contraction force was reduced. In addition, when applying hot melt to the napkin body, it involves advanced coating technology,
The application place and the like are limited. If the application amount of the hot melt varies, the fixing of the elastic body tends to be poor, and the napkin has a drawback that it does not become three-dimensional.

Further, in the conventional napkin, since the range of the application portion, the application place, and the like are limited as described above, the shrinkage range in which the elastic body is generated is long, and the napkin is too strong and has a long warp. And it was difficult to match the napkin to the body shape of the wearer.

The present invention is intended to solve the above-mentioned problems, and forms a sanitary napkin three-dimensionally in accordance with the body shape of a user and unnecessarily strengthens this three-dimensional deformation. It is possible to improve the feeling of use without causing any trouble and only at necessary places. It is another object of the present invention to easily manufacture the three-dimensional napkin.

[0006]

According to the present invention, in order to solve the above-mentioned problems, a narrower than the surface sheet and the leak-proof sheet is provided between the water-permeable top sheet and the water-impermeable leak-proof sheet. A napkin body is formed with a body fluid absorbing layer interposed, and the thermoplastic elastic bands located on both sides in the length direction of the napkin body are stretched 1.2 to 2.0 times before being positioned on the napkin body. In the state, both ends in the length direction are heated and plastically deformed to make it an inelastic part, and the middle part in the length direction of the thermoplastic elastic band is 30% of the total length of the napkin body to be formed
It is formed as an elastic part with a length of up to 90%, and this thermoplastic elastic band is fixed by heat welding both ends and the outside in the length direction to both sides of the napkin body, and urges the elastic part in the contraction direction. And characterized in that thermoplastic elastic bands are set up on both sides of the absorbent layer.

In a second aspect of the present invention, a body fluid absorbing layer narrower than the surface sheet and the leak-proof sheet is interposed between the water-permeable top sheet and the water-impermeable leak-proof sheet. A napkin body is formed, and on both sides of the napkin body in the longitudinal direction, a thermoplastic elastic band having an elongation rate of 1.2 to 2.0 times is located in the longitudinal direction. The inelastic parts plastically deformed by heat welding at both ends are fixed to the napkin body, and at the middle part in the length direction, elastic at 30% to 90% of the total length of the napkin body to be formed A portion is provided, and the outside of the elastic portion is heat-welded and fixed to the napkin main body, and the elastic portion of the thermoplastic elastic band is urged in the contracting direction to rise up on both sides of the absorbent layer.

[0008] The thermoplastic elastic band may be formed of a thermoplastic elastomer film.

The outer surface of the thermoplastic elastic band may be covered and fixed with a nonwoven fabric.

[0010]

The present invention is constructed as described above. The napkin is provided with a thermoplastic elastic band having an elongation of 1.2 to 2.0 times at both ends in the longitudinal direction and the outer side on both sides in the longitudinal direction of the napkin body. It is fixed by heat welding. Further, the thermoplastic elastic band is heated at both ends in the longitudinal direction and plastically deformed before being positioned on the napkin main body, thereby forming an inelastic portion. Also,
An intermediate portion in the length direction of the thermoplastic elastic band is formed as an elastic portion with a length of 30% to 90% of the entire length of the napkin body to be formed.

[0011] Therefore, the thermoplastic elastic band shrinks in the area of the elastic portion and rises on both sides of the absorbent layer. This rising height is the largest at the portion where the elastic portion is located. Then, when the napkin is brought into contact with the local part of the user, the absorbent layer is located at the local part via the topsheet. Most of the body fluid discharged from the user is absorbed by the absorbent layer.

Further, the thermoplastic elastic belt has both ends and the outside in the length direction fixed to both sides of the napkin main body, and the elastic portion and the non-elastic portion rise up above the absorbent layer. The rising portion is formed in a pocket shape. Therefore, the amount of discharged body fluid is large, and even if the body fluid is diffused in the width direction of the absorbent layer, since the pocket-shaped rising portions are located on both sides of the absorbent layer, the reliable lateral leakage of the bodily fluid is prevented, Sanitary mounting is possible.

[0013] Further, the napkin is formed by heating both ends in the longitudinal direction in advance and plastically deforming the thermoplastic elastic band before positioning the thermoplastic elastic band on the napkin main body, thereby forming an inelastic portion. For this reason, even if the thermoplastic elastic band is formed with a long pocket-shaped rising portion, the length of the elastic portion can be freely formed within the range of the length of the rising portion. Adjustment becomes easy.

In a second aspect of the present invention, a thermoplastic elastic band having an elongation of 1.2 to 2.0 times is positioned on both sides in the longitudinal direction of the napkin main body, and the thermoplastic elastic band is formed as a long belt. Inelastic portions that are thermally welded and plastically deformed at both ends in the length direction are fixed to the napkin body. The thermoplastic elastic band is provided with an elastic portion in the middle of the length direction at a length of 30% to 90% of the entire length of the napkin body to be formed, and the outside of the elastic portion is thermally welded to the napkin. It is fixed to the body.

Therefore, the thermoplastic elastic band makes the thermally welded inelastic portion non-shrinkable and performs retraction and shrinkage in the range of the unfixed elastic portion. Become. Also, since this elastic part rises higher than the absorbent layer in the part where the body fluid is strongly diffused,
It is possible to prevent lateral leakage of bodily fluids. In addition, since the napkin fixes the thermoplastic elastic band to the napkin main body by a simple method, the manufacturing process is simplified, and inexpensive manufacturing becomes possible.

Further, since the thermoplastic elastic band has a band-like shape, it has excellent stretching resistance as compared with a thread-like elastic body and does not break during production. In addition, one thermoplastic elastic band is more than the case where a plurality of thread-like elastic bodies are used,
Workability is good, fixation to the napkin body is easy, and simple manufacture is possible.

The thermoplastic elastic band has an elongation of 1.2 to 1.2.
It is fixed as 2.0 times. When formed in this manner, the thermoplastic elastic band can obtain an appropriate contraction force, and can start up appropriately. Further, when the thermoplastic elastic band is fixed at an elongation ratio of less than 1.2, the contraction force is insufficient, and the starting amount is insufficient. If the elongation rate is fixed to more than 2.0 times, the contraction force becomes large, and the warping of the napkin body becomes too large.

The thermoplastic elastic band has an elastic portion having a length of 30% to 90% of the entire length of the napkin body to be formed. With this configuration, the contraction range of the thermoplastic elastic band is optimized with respect to the entire length of the napkin main body, and the napkin can be formed three-dimensionally according to the user's body shape. Also, if the elastic portion is formed with less than 30% of the entire length of the napkin main body for molding, the contraction range of the thermoplastic elastic band becomes short, and the napkin can be three-dimensionally adapted to the body shape of the user. It is difficult to form them in a uniform manner. In addition, if the thermoplastic elastic band is formed so that the length of the elastic portion or the non-fixed portion exceeds 90% of the entire length of the napkin main body for molding, the shrinkage range is too large and the napkin warpage becomes excessively strong. , Worsens the usability.

Further, if the thermoplastic elastic band is formed of a thermoplastic elastomer film, a sufficient shrinking force can be obtained and the fixation to the napkin body by heat welding becomes strong, so that a high quality napkin can be manufactured. .

If the outer surface of the thermoplastic elastic band is covered and fixed with a nonwoven fabric, the feel is good and the contact with the skin is also flexible, so that the usability can be improved.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS. 1 to 3. (1) is a surface sheet formed of a water-permeable mesh sheet or the like, and a polyethylene film or the like on the back side. Of the non-permeable leak-proof sheet (2). Further, an absorbent layer (3) narrower than the topsheet (1) and the leakproof sheet (2) is interposed between the topsheet (1) and the leakproof sheet (2). This absorbing layer (3) can be formed of a bodily fluid absorbing material such as cotton or pulp.

Further, the topsheet (1) and the leak-proof sheet (2) located on the outer periphery of the absorbing layer (3) are heat-welded to form the absorbing layer (3).
An outer peripheral flap (4) having a constant width is projected on the outer periphery of the napkin to form a napkin body (5). Also, this napkin body (5)
The outer surface of the leak-proof sheet (2) may be provided with a fastening portion (not shown) to the inner surface of the shorts.

The napkin body (5) has a width of 5 mm.
A thermoplastic elastic band (6) of about 25 mm is located on both sides in the length direction. This thermoplastic elastic band (6) is a napkin body
Before being located in (5), it is stretched at an extension rate of 1.2 to 2.0 times, and in this stretched state, both ends in the length direction are heated and plastically deformed,
It is an inelastic part (7). In addition, thermoplastic elastic band (6)
The napkin body (5) for the purpose of forming the middle part in the length direction
The elastic portion (8) has a length of 30% to 90% of the entire length of the elastic member (8).

The thermoplastic elastic band (6) has both ends in the longitudinal direction and the outer side welded to both sides of the napkin body (5) and is fixed in a pocket shape. When formed in this way,
The elastic portion (8) of the thermoplastic elastic band (6) is urged in the contraction direction, and the thermoplastic elastic band (6) rises three-dimensionally on both sides of the absorbent layer (3). In this case, the thermoplastic elastic band (6)
As shown in FIG. 1, not only the elastic part (8) but also the non-elastic part (7) rises while being fixed to the outer peripheral flap (4) located on the outer periphery of the absorbent layer (3). The length (11) is long, and it is possible to widely cover both sides of the absorption layer (3).

Further, if a thermoplastic elastomer film is used for the thermoplastic elastic band (6), a sufficient shrinkage force can be obtained, and the fixing to the napkin body (5) by heat welding becomes strong.

In the above-described construction, the thermoplastic elastic band (6) undergoes retraction and contraction at the elastic portion (8), and the elastic portions (8) on both sides of the absorbent layer (3). And the inelastic portion (7) rises. This rise height is the elastic part
The portion where (8) is located is the largest. And
When the napkin (12) comes into contact with the local part of the user, the absorbent layer (3) is located at the local part via the topsheet (1). Most of the body fluid discharged from the user is absorbed by the absorbing layer (3).

The napkin (12) is a thermoplastic elastic band.
Before positioning (6) on the napkin body (5), both ends in the longitudinal direction are preliminarily heated and plastically deformed to form an inelastic portion (7). For this reason, even if the thermoplastic elastic band (6) has a long pocket-shaped rising portion, the rising length (11)
It is possible to freely form the length of the elastic portion (8) within the range described above, and it is easy to adjust the contraction force.

The thermoplastic elastic band (6) has both ends and the outside in the longitudinal direction fixed to both sides of the napkin body (5),
The elastic part (8) and the non-elastic part (7) are located higher than the absorbing layer (3). Further, since the rising portion has a pocket shape, a large amount of body fluid is discharged, and even if diffusion of the body fluid occurs in the width direction of the absorbent layer (3), there is no possibility that the body fluid will cross the rising portion, and the body fluid will not flow. To prevent side leakage.
Sanitary mounting is possible.

Further, since the thermoplastic elastic band (6) forms the elastic portion (8) with a length of 30% to 90% of the total length of the napkin main body (5), Thermoplastic elastic belt
The contraction range of (6) is optimized, and the napkin (12) can be formed three-dimensionally according to the body shape of the user.

Further, the thermoplastic elastic band (6) has a belt-like shape, so that it has better stretch resistance than a thread-like elastic body, and does not break during production. In addition, one thermoplastic elastic band (6) has better workability than the case where a plurality of thread-like elastic bodies are used, is easily fixed to the napkin body (5), and can be manufactured easily. Becomes

In the first embodiment, before the thermoplastic elastic band (6) is fixed to both sides of the napkin body (5), both ends of the thermoplastic elastic band (6) in the longitudinal direction are previously formed. Was heated and plastically deformed to provide an inelastic portion (7). However, in the second embodiment, the thermoplastic elastic band (6) has the inelastic portion (7) formed at the same time as the fixing to the napkin body (5).

As shown in FIGS. 4 and 5, the napkin (12) has both ends in the longitudinal direction of the thermoplastic elastic band (6) having an elongation of 1.2 to 2.0 times welded to the napkin body (5). And then fixed. In addition, the thermoplastic elastic band (6)
Causes plastic deformation at both ends in the longitudinal direction,
(7).

Further, the thermoplastic elastic band (6) is formed at an intermediate portion in the longitudinal direction at 30% of the total length of the napkin body (5) to be formed.
% To 90% of elastic part (8), thermoplastic elastic band
The outside of (6) is fixed to the napkin body (5) by heat welding.

When formed in this manner, the thermoplastic elastic belt
In (6), the thermally welded inelastic portion (7) is made non-shrinkable, and is restored and contracted in the range of the unfixed elastic portion (8). For this reason, the elastic part (8) rises on both sides of the absorbing layer (3),
It is formed in a pocket shape. Further, since the elastic portion (8) rises higher than the absorbing layer (3) in a portion where the body fluid is strongly diffused, lateral leakage of the body fluid can be prevented. In this case, the rising length (11) is the same as the formation length of the elastic portion (8).

For this reason, the napkin (12) is provided with an elastic portion (8).
Only the napkin can be started up, but the thermoplastic elastic band (6) is fixed to the napkin body (5) by a simple method, so that the manufacturing process is simplified and inexpensive manufacturing becomes possible.

In the above embodiment, the thermoplastic elastic band is used.
(6) exposes the outer surface without coating, but in a different embodiment, the thermoplastic elastic band (6) is fixed by coating the outer surface with a nonwoven fabric (13) as shown in FIG. I have. When formed in this way, the feeling of touch is good, the contact with the skin is soft, and the feeling of use can be improved as compared with the case where the thermoplastic elastic band (6) is left exposed. In this case, the type of the non-woven fabric (13) is not limited, but if the non-woven fabric (13) has an extensibility corresponding to an appropriate tensile force, the elastic portion of the thermoplastic elastic band (6) can be used.
The contraction force of (8) is not greatly reduced.

The thermoplastic elastic band (6) and the nonwoven fabric
Before fixing the thermoplastic elastic band (6) on both sides of the napkin body (5), the thermoplastic elastic band in the stretched state is fixed with (13).
The nonwoven fabric (13) is fixed to (6) with a hot melt (14).
However, in this case, when the hot melt (14) is applied to the entire surface, the contraction of the thermoplastic elastic band (6) is prevented, so that the hot melt (14) is linearly formed at regular intervals as shown in FIG. It is applied by applying it in a polka dot shape as shown in FIG. When formed in this manner, the thermoplastic elastic band (6)
Forms a contraction interval (15) with the non-woven fabric (13), and as shown in FIG. 7, can be easily restored and contracted.

[0038]

[Effects of the Invention] The present invention is configured as described above, and the napkin extends the thermoplastic elastic band at an elongation of 1.2 to 2.0 times before positioning the thermoplastic elastic band on the napkin body. Heating and plastic deformation occurs at both ends in the vertical direction to form an inelastic portion. Further, the thermoplastic elastic band is fixed by heat welding both ends and the outside in the length direction to both sides in the length direction of the napkin body. In addition, the middle part in the length direction of the thermoplastic elastic band is set to 30% of the total length of the napkin body to be formed.
The elastic part is 90% long.

For this reason, the thermoplastic elastic belt is positioned so that the elastic portion and the non-elastic portion rise higher than the absorbing layer, and the rising portion has a pocket shape. For this reason, the discharge amount of the body fluid is large, and even if the diffusion of the body fluid occurs in the width direction of the absorption layer, the pocket-shaped rising portions are located on both sides of the absorption layer,
Sanitary mounting can be achieved by reliably preventing lateral leakage of bodily fluids.

Before the thermoplastic elastic band is positioned on the napkin main body, both ends in the longitudinal direction of the napkin are preliminarily heated and plastically deformed to form an inelastic portion. For this reason, even if the thermoplastic elastic band is formed with a long pocket-shaped rising portion, the length of the elastic portion can be freely formed within the range of the length of the rising portion. Adjustment becomes easy.

In a second aspect, the thermoplastic elastic band is
The inelastic portion is formed on the napkin body at the same time as the inelastic portion is fixed. When formed in this manner, the thermoplastic elastic band makes the thermally welded inelastic portion inconsistent, and performs retraction and contraction in the range of the elastic portion that is not fixed. For this reason, the elastic portion rises on both sides of the absorbing layer and is formed in a pocket shape. In addition, this elastic part is a part where body fluid spreads sharply,
Since it rises higher than the absorption layer, lateral leakage of body fluid can be prevented. In addition, since the napkin fixes the thermoplastic elastic band to the napkin main body by a simple method, the manufacturing process is simplified, and inexpensive manufacturing becomes possible.

Further, since the thermoplastic elastic band has a band-like shape, the thermoplastic elastic band is excellent in elongation resistance as compared with the thread-like elastic body and does not break during production. In addition, one thermoplastic elastic band is more than the case where a plurality of thread-like elastic bodies are used,
Workability is good, fixation to the napkin body is easy, and simple manufacture is possible.

The thermoplastic elastic belt has an elongation of 1.2 to 1.2.
It is fixed as 2.0 times. When formed in this manner, the thermoplastic elastic band can obtain an appropriate contraction force, and can start up appropriately.

Further, the elastic portion of the thermoplastic elastic band is provided with an elastic portion having a length of 30% to 90% of the entire length of the napkin main body to be formed. With this configuration, the contraction range of the thermoplastic elastic band is optimized with respect to the entire length of the napkin main body, and the napkin can be formed three-dimensionally according to the body shape of the user.

[Brief description of the drawings]

FIG. 1 is a perspective view of a napkin according to a first embodiment.

FIG. 2 is a plan view showing an extended state of the napkin of the first embodiment.

FIG. 3 is an enlarged end view taken along the line AA of FIG. 2;

FIG. 4 is a perspective view of a napkin according to a second embodiment.

FIG. 5 is an expanded state of the napkin of the second embodiment.

FIG. 6 is an end view of a different embodiment in which a thermoplastic elastic band is covered and fixed with a nonwoven fabric.

FIG. 7 is a partial sectional view showing a fixed state of the thermoplastic elastic band and the nonwoven fabric in a contracted state.

FIG. 8 is a plan view showing a state in which a hot melt is linearly applied to a thermoplastic elastic band at regular intervals.

FIG. 9 is a plan view showing a state in which hot melt is applied to a thermoplastic elastic belt in a polka dot shape.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Top sheet 2 Leak-proof sheet 3 Absorption layer 5 Napkin main body 6 Thermoplastic elastic band 7 Inelastic part 8 Elastic part 13 Nonwoven fabric

Claims (4)

(57) [Scope of request for utility model registration] 1. A napkin body is formed between a water-permeable top sheet and a water-impermeable leak-proof sheet with a body fluid absorbing layer narrower than the top sheet and the leak-proof sheet. Before placing the thermoplastic elastic bands located on both sides in the length direction of the napkin body,
Heats both ends in the length direction in a 1.2-2.0 times state and plastically deforms it to make it an inelastic part, and makes the middle part of the thermoplastic elastic band in the length direction 30% of the total length of the napkin body to be formed ~
It is formed as an elastic part with a length of 90%, and this thermoplastic elastic band is fixed by heat welding both ends and the outside in the longitudinal direction to both sides of the napkin body, and urges the elastic part in the contraction direction. A sanitary napkin characterized in that thermoplastic elastic bands are set up on both sides of the absorbent layer. 2. A napkin body is formed between a water-permeable topsheet and a water-impermeable leakproof sheet with a body fluid absorbing layer narrower than the topsheet and the leakproof sheet. The extension rate is 1. on both sides of this napkin body in the longitudinal direction.
A 2- to 2.0-fold thermoplastic elastic band is positioned in the length direction, and the thermoplastic elastic band is heat-welded at both ends in the length direction and the plastically deformed inelastic portion is fixed to the napkin body. In the middle part of the length direction, the total length of the napkin body to be formed is
An elastic part is provided with a length of 30% to 90%, and the outside of this elastic part is heat-welded and fixed to the napkin body, and the elastic part of the thermoplastic elastic band is urged in the contraction direction so as to be on both sides of the absorbent layer. A sanitary napkin characterized by being launched. 3. The thermoplastic elastic band is formed of a thermoplastic elastomer film.
Sanitary napkin. 4. The sanitary napkin according to claim 1, wherein the thermoplastic elastic belt has an outer surface covered and fixed with a nonwoven fabric.