JPH04152946A - Absorptive article - Google Patents

Abstract

PURPOSE:To prevent literal leakage by extending a couple of left and right elastic members close to both sides of the almost central region inside a surface material in its longitudinal direction, fixing both ends to the surface material and fixing the surface material to a sealing material close to both sides of the elastic members in their longitudinal directions along the elastic member. CONSTITUTION:A couple of elastic members 5 and 5 are provided close to the left and right sides of the almost central region in their longitudinal directions inside the surface of a surface material 2 in contact with the body. The member 5 is positioned between a sealing sheet 3 covering both side ends in the longitudinal direction of the surface of an absorbent 4 in contact with the body and the surface sheet 2. The elongated member 5 is fixed to the inner surface of the sheet 2 to form fixed points 5A and 5A, and the member 5 between the points 5A and 5A is not fixed and made free. Besides, the sheet 2 and the sealing sheet 3 are linearly bonded and fixed close to both sides in the longitudinal direction of the member 5 to form fixing lines 6 and 7. As a result, the lateral leakage from both side ends is surely prevented without being affected by the size of the wearing shorts.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to sanitary napkins, bats for incontinence, etc., which the user wears in the narrow crotch area along with underwear such as shorts (hereinafter referred to as "shorts"). The present invention relates to an absorbent article, and more particularly, to an absorbent article having a high degree of leak-proofing property.

[Prior art and problems to be solved by the invention] Conventional absorbent articles such as sanitary napkins and bats for incontinence have the following problems:
Basically, liquid-permeable surface material, liquid-retaining absorbent material,
and a liquid-impermeable leakage preventive material. In recent years, efforts have been made to improve absorption performance by introducing new materials into each component, such as absorbent polymers and hydrophobic surface materials.

However, even if new materials are introduced and each component has excellent performance in absorbent articles, there is still some leakage from the crotch and buttocks during actual use.
Overall, it could not be said that the original performance of the absorbent article was fully exhibited.

The main causes of such leakage are: ■ irregular forces applied to the worn absorbent article due to the user's activities, etc., causing the absorbent article to shift from its predetermined wearing position, and ■ failure of the absorbent article. This is caused by the regular deformation and twisting of the absorbent article, which creates a gap between the body and the absorbent article. In addition, the leakage caused by ■ and ■ is greatly affected by the shorts the user wears. For example, if the user wears loose shorts that do not fit tightly to the body, the influence is large, and the leakage mentioned above is This can easily occur even with low absorption capacity. On the other hand, when wearing shorts that closely fit the body, the user often has to endure discomfort such as a feeling of pressure and stuffiness.

Therefore, in order to solve these problems, many absorbent articles have been proposed in which a pair of flexible flaps each extend outward in the width direction from the central part on both sides of the absorbent article in the longitudinal direction. (Japanese Patent Application Laid-open No. 60-75058, Japanese Patent Application Laid-open No. 111002, etc.). In the case of these absorbent articles, each flap is wrapped around the shorts to secure the absorbent article to the shorts during use, thereby stabilizing the absorbent article and improving leak-proofing properties.

However, when these absorbent articles are worn in the correct position, they can effectively prevent the leakage caused by ■ and ■ mentioned above to some extent, but depending on the shorts worn, for example, they may not fit tightly against the body. When wearing shorts with weak elasticity or shorts whose crotch width is larger than the width of the absorbent material, even if the absorbent article is fixed to the crotch area with a flap, the flap may be caused by twisting of the absorbent article due to the user's movements. There was a problem in that the absorbent material rolled up and covered the surface of the absorbent article, and leakage could not necessarily be effectively prevented.

Furthermore, as absorbent articles whose shape is adapted to the user's crotch area, for example, absorbent articles that are substantially vertically long but have a concave center area (Japanese Utility Model Publication No. 60-25237) or a convex rear area. Absorbent article (Japanese Patent Application Laid-open No. 63-574
Publication No. 6) has been proposed. These absorbent articles are
If tight-fitting shorts are used, a certain degree of leakage prevention effect will be exhibited, but if shorts with poor tight-fitting properties are used, no effect will be exhibited.

In addition, since conventional absorbent articles are substantially vertically long,
The narrow width of the absorbent body leads to leakage, and leakage is overwhelmingly from the side edges.

For this reason, various proposals have been made, such as making the side edges of absorbent articles hydrophobic (Japanese Patent Publication No. 59-39134) and absorbent articles made discontinuous with nol (Japanese Patent Laid-Open No. 48-63071). In actual use, the mounting form cannot be defined due to twisting and misalignment, so the respective leakage prevention effects are not necessarily exhibited.

Therefore, an object of the present invention is to provide an absorbent article that can reliably prevent lateral leakage from both end portions, regardless of the size of the shorts worn.

[Failure to solve the problem]

As a result of various studies on absorbent articles that can effectively prevent leakage from the crotch and buttocks and provide a comfortable wearing experience no matter what type of shorts are worn, the inventors found that the surface of the absorbent articles It has been found that the above object can be achieved by applying specific measures to both sides in the longitudinal direction.

The present invention has been made based on the above findings, and includes a liquid-permeable surface material, a liquid-impermeable leakage preventive material, and a liquid-retaining absorbent body interposed between these two members, In an absorbent article formed in a vertically elongated manner, a pair of left and right elastic members are extended in the vicinity of both sides in a substantially central region in the longitudinal direction inside the surface material, and both ends of each are fixed to the surface material, The present invention provides an absorbent article characterized in that the above-mentioned surface material is fixed to the leakage preventive material along the elastic members near both sides in the longitudinal direction of the elastic members.

[Effect]

According to the present invention, when the shorts are worn after the absorbent article is fixed to the crotch portion of the shorts, the pair of elastic members of the absorbent article contract, and the portions fixed near both sides of the pair of elastic members contract. A pair of leak-proof walls are formed at positions 1 on both sides of the body fluid discharge area by lifting the surface material in the region, and even if the user does exercise after wearing it, the upper ends of the pair of leak-proof walls will not touch the elastic member. The pair of leak-proof walls can elastically adhere to the skin and prevent body fluids from leaking sideways.

[Example] The present invention will be described below based on the example shown in FIGS. 1 to 3. In addition, FIG. 1 is a perspective view showing the surface side that contacts the skin of an embodiment of the absorbent article of the present invention, FIG. The figure is a view corresponding to FIG. 1 showing another embodiment of the absorbent article of the present invention.

As shown in FIGS. 1 and 2, the absorbent article 1 of this embodiment includes a surface material (surface sheet) 2 having a liquid-permeable portion that contacts the skin and allows bodily fluids such as menstrual blood to pass through, and a pair of shorts. It is comprised of a leak-proof material (leak-proof notebook) 3 that comes into contact with the other to prevent the leakage of body fluids, and a liquid-retaining absorbent body 4 that is interposed between these two ports 2 and 3, and is formed substantially vertically. has been done.

As shown in FIG. 2, the surface channel 2 in this embodiment surrounds the entire surface of the absorbent body 4, and the liquid permeable portion 2A is directly opposed to the absorbent body 4 on the surface excluding the peripheral portion.
, and liquid impermeable portions 2B, 2B are formed on the outer sides of the liquid permeable portion 2A on both sides in the longitudinal direction, respectively. As the surface sheet 2, known materials such as a nonwoven fabric or a hydrophobic film having perforated nets or films can be used, and for example, those described in Japanese Patent Publication No. 1-119251 are preferred.

Further, although not shown, the liquid permeable portion 2A preferably has an uneven structure having a top portion, a bottom portion, and a wall portion connecting these two portions, and an opening portion is preferably provided only in at least a portion of the wall portion. . Such a liquid permeable part 2A allows body fluid to pass through the opening, prevents the body fluid from returning to other parts, and ensures shielding properties and a dry feeling after absorption. The above-mentioned openings are provided in consideration of the balance of body fluid permeability, body fluid return prevention property, and shielding property after absorption, but usually the size is 0.1 to 2 mm, and the density is It is preferable to set 10 to 100/4.

In addition, the top sheet 2 and the leak-proof sheet 3 in this embodiment are arranged so that the leak-proof sheet 3 prevents the leakage of liquid from the absorbent body 4. The peripheral edge on the side that comes into contact with the skin is covered, and the top sheet 2 further covers the entire surface of the leak-proof sheet 3 and the surface side of the absorber 4.

A pair of elastic members 5.5 are provided in the vicinity of both left and right sides of a substantially central region in the longitudinal direction on the inner side of the surface of the surface material 2 that contacts the skin.

Since these elastic members 5.5 each have the same configuration, one elastic member 5 will be described in detail below.

As shown in FIG. 2, the elastic member 5 is located between the leak-proofing channel 3 that covers both edges of the absorbent body 4 in the longitudinal direction on the side that contacts the skin, and the surface note 2. There is.

Both ends of the elastic member 5 are fixed to the inner surface of the topsheet 2 by means of adhesive or welding in the stretched state to form fixing points 5A, 5A, and the elastic member 5 has elastic properties between these fixing points 5A, 5A. The member 5 is not fixed and is in a free state.

Further, near both sides of the elastic member 5 in the longitudinal direction, the top sheet 2 and the leak-proof notebook 3 are linearly bonded and fixed to each other to form fixing lines 6 and 7, respectively. The fixing line 6 located inside the elastic member 5 is curved inward according to the shape of the groin area, as shown in FIG. It intersects with 5A.

By making the fixing line 6 intersect with both ends of the elastic member 5 in this way, the fixing points 5A, 5A can be formed at the same time as the fixing line. On the other hand, it is located outside the elastic member 5! The fixing line 7 is formed linearly in the longitudinal direction of the absorbent article 1. Therefore, an elongated space IA is formed between the surface note 2 and the leakage prevention note 3 by the pair of fixed wires 6.7, and the elastic member 5 is housed in the space IA. There is. Under such conditions, when the absorbent article 1 curves in the front-back direction, the elastic member 5 in the free state contracts and lifts the surface sort 2 in the space above from the other curved parts, as shown in FIG. A leak-proof wall IB is formed. Note that the fixed wire 6 is preferably joined by true-melt adhesive splitting, and the fixed wire 7 is preferably joined by heat sealing.

Therefore, the width W and length of the absorbent article 1 forming the leakage-preventing walls IB and IB can be set appropriately as necessary, but at the same time, Limited by the width of the crotch. That is, - for boat fishing, taking into account that the width of the crotch part is 60 to 80 m+ and the width of the wearer's crotch part is about 20 to 35 m, the distance between the upper ends of the leak-proof walls IB and IB is The convergence W1 is 30~
60 m is preferable, and 30 to 50 m is more preferable.

When the width W1 becomes 30 rm, the absorption area of the surface note 2 formed by the fixing line 6.6 becomes too narrow and cannot be stably positioned at the ejection part, and sometimes this area is not positioned from the ejection part. If the width W exceeds 60 mm, the absorption area of the top sheet 2 formed between the fixing lines 6 and 6 will become too wide and the leakage prevention wall IB, IB becomes higher and deforms in various ways, causing leakage walls IB, I
There is a possibility that the function B, that is, the ability to effectively prevent side leakage, may become impossible.

Further, the heights, h, of the leakage prevention walls IB, IB are appropriately set by the width W2 between the fixing lines 6.6 and the width W3 between the fixing lines 7.7 of each of the elastic members 5.5. can do. That is, the fixed line 6 that sets the height h
．． The width W between 7 is ((wt wz) + (wi
wt))/2, and this width W4 is 2 to 15■
is preferable, and 3 to 18 mace is more preferable. Width W is 2i
If it is less than n, the portion of the top sheet 2 in the spaces IA, IA is too narrow and the top sheet 2 in this portion cannot be lifted by the elastic member 5.5.
Leakage prevention walls] If the height h of each of B and 1B is too low and the shorts have weak adhesion, the leakage prevention walls IB and IB will not function properly, and if the width W4 exceeds 15 degrees, the leakage prevention walls will not work properly. Leaky wall IB
, IB become too high, causing discomfort when worn, and there is also a risk that the leak-proof walls IB, IB will be deformed in various ways and will not be able to perform their functions.

Further, it is preferable that both of the leak-proof walls IB, IB are inclined toward the outside of the absorbent article 1 in order to reduce discomfort and improve leak-proof properties. To do so, set each width to (wt wt
>< (wi wt), and it is preferable to set this difference to 2 to 6 m.

Further, the length i of the elastic member 5 is 4 when considering that the total length of the absorbent article 1 is usually 200 to 300 m.
0 to 80 is preferable 6 and the elastic member 5 is 4,
It is preferable for the absorbent article 1 to be mounted such that it is located offset approximately 20 to 40 meters forward from the center in the longitudinal direction of the absorbent article 1 .

Although not shown, the back side of the absorbent article 1, that is,
An adhesive part is formed in a part of the notebook 3, and the absorbent article 1 can be fixed to the crotch part of the shorts by this adhesive part.

For the top sheet 2, leak-proof notebook 3, absorbent body 4, and elastic member 5, known materials conventionally used in absorbent articles can be used. still,
As a means to control the liquid permeability and liquid return properties of the top sheet 2, the surface of the film is made hydrophilic by applying a surfactant, physical treatment such as plasma irradiation, or chemical treatment such as mineral acid treatment. On the other hand, there is also a method of making the surface of the film water repellent by applying a silicone-based or fluorine-based chemical. Further, the texture of the surface notebook 2 can be improved by calendering the film or embossing it with a fine pattern, if necessary. Furthermore, from the viewpoint of absorbency, particularly absorption rate, notebooks in which a film and a hydrophilized fiber aggregate are integrated, such as laminated nonwoven fabric, Lamie, -F paper, etc., are preferably used.

Next, Mr. B, who uses the absorbent part 1, will be explained.

First, when the absorbent article 1 is fixed to the crotch part of shorts with the surface sort 2 facing up, the absorbent article 1 curves in the front-rear direction according to the curvature of the crotch part in the front-rear direction. At this time, the left and right pair of elastic members 5.5 contract to release the topsheet 2 in the spaces IA and IA located between the respective fixing lines 6.7 from the curved surface of the absorbent article 1. A pair of leakage walls IB are lifted from other parts of the
, IB are formed on the left and right sides of the absorbent article 1.

After that, when the shorts are worn and the absorbent article 1 is brought into contact with the skin, the pair of leak-proof walls IB formed on the absorbent article 1,
The IB surrounds the discharge part from the vicinity of both sides, and the leakage prevention walls IB can reliably prevent body fluid from leaking sideways from the discharge part. At this time, since the upper ends of these leakage prevention walls 1B and IB are constituted by the elastic member 5.5, the upper ends elastically adhere to the shape of the wearer's groin area, preventing side leakage of body fluids. can be more reliably prevented.

Further, as shown in FIG. 3, an absorbent article 1 according to another embodiment of the present invention is the same as the above embodiment except that a pair of flaps IC1IC are extended outward in the width direction from both left and right edges in the longitudinal direction. are configured similarly. By extending the pair of left and right flaps IC1IC in this manner, the absorbent article 1 can be reliably fixed to the crotch portion of the shorts. That is, each flap IC1IC is formed by integrally extending outward in the width direction from both left and right edges of the portion corresponding to the elastic member 5.5 in a state in which the top sheet 2 and the leak-proof sheet 3 are superposed. It was formed. Moreover, each flap IC1IC may be molded as an independent member, and each of these independent flaps IC1IC may be attached to the main body of the absorbent article 1 as shown in FIG. In this embodiment as well, the same effects as in the above embodiment can be expected.

In addition, in the absorbent article of the present invention, a pair of left and right elastic members are extended in the vicinity of both sides in a substantially central area in the longitudinal direction inside the surface material, and both ends of the elastic members are fixed to the surface material. The present invention is not limited to the above embodiments as long as the surface material is fixed to the leakage preventive material along the elastic member in the vicinity of both longitudinal sides of the elastic member.

〔Effect of the invention〕

The absorbent article of the present invention can reliably prevent lateral leakage from both end portions, regardless of the size of the shorts worn.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing the surface side that contacts the skin of an embodiment of the absorbent article of the present invention, Fig. 2 is a sectional view taken along the line ■-■ showing the absorbent article of Fig. FIG. 2 is a view corresponding to FIG. 1 showing another embodiment of the absorbent article of the invention. l; Absorbent article 2; Surface sheet (surface material) 3; Leak-proof notebook (leak-proof material) 4; Absorbent body 5; Elastic member 6.7; Fixed line 5A; Fixed point patent applicant Kao Corporation

Claims (1)

[Claims] In an absorbent article having a liquid-permeable surface material, a liquid-impermeable leakage preventive material, and a liquid-retentive absorbent body interposed between these two members, and formed substantially vertically, the surface material A pair of left and right elastic members are extended in the vicinity of both sides in the approximate longitudinal center region of the inner side, and both ends of each elastic member are fixed to the above surface material, and the above surface material is An absorbent article characterized in that the absorbent article is fixed to the leakage preventive material along the elastic member.