JP2001178768A - Absorbent article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an absorbent article with sufficient flexibility and rigidity granted to necessary portions, ensuring good suitability and satisfactory oozing control of a liquid. SOLUTION: This absorbent article 1 having a liquid retainable absorbing layer 2 and a liquid-nonpermeable leak preventing layer 3 and being substantially rectangular is provided with a leak preventing groove 61 formed with a number of recessed portions 62 discontinuously and linearly arranged along the longitudinal direction of a napkin 1. The length L1 of the recessed portion 62 in the linear direction is greater than a space T1 between the recessed portion 62.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an absorbent article which is excellent in leak prevention and also has a good feeling of wearing.

[0002]

2. Description of the Related Art Various absorbent articles having a liquid-retentive absorbing layer formed with a leakage-preventing groove in order to improve leakage-preventing properties have been proposed. For example, Japanese Patent Application Laid-Open No. 9-108262 proposes an absorbent article in which low pressure parts and high pressure parts are alternately arranged in parallel to form leak-proof grooves. However, in such conventionally proposed absorbent articles having leak-proof grooves, the parts to be supple are not flexible or the parts requiring rigidity do not have sufficient rigidity, There is a problem that the fitting property is not sufficient and the bleeding property of the liquid cannot be sufficiently controlled.

Accordingly, an object of the present invention is to provide an absorbent article which is sufficiently imparted to a site where flexibility and rigidity are required, has good fitting properties, and can sufficiently control liquid bleeding properties. It is in.

[0004]

SUMMARY OF THE INVENTION The present invention relates to a substantially vertically absorbent article having a liquid-retentive absorbing layer and a liquid-impermeable leak-proof layer. A plurality of recesses are provided intermittently in a linear manner along the leak preventing groove, and the length of the recess in the linear direction is longer than the interval between the recesses. The object has been achieved by providing an absorbent article.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a preferred embodiment of the present invention will be described. A sanitary napkin 1 as an absorbent article according to the first embodiment has a liquid-retaining absorbent layer 2 and a liquid-impermeable leakproof layer 3 as shown in FIG. is there.

In the sanitary napkin 1 of this embodiment, the absorbent layer 2 has a liquid-permeable topsheet 21 and a liquid-retentive absorbent body 22.
Consists of The left and right sides of the top sheet 21 are wrapped around the back surface of the first absorber 23. The leak-proof layer 3 is made of a liquid-impermeable leak-proof sheet 31. The absorption layer 2 and the leakage prevention layer 3 are adhered via an adhesive.

Further, the sanitary napkin 1 of the present embodiment comprises:
A pair of left and right flaps 8 formed by extending the leakage prevention layer 3 outward in the width direction are biased toward the front. Although not shown, an adhesive is applied to the back side of the flap 8 and the back side of the leak-proof layer 3 to which the absorbent layer 2 is adhered to form an article fixing portion.

Thus, the sanitary napkin 1 of the present embodiment
As shown in FIGS. 1 and 2, a number of recesses 62 (for convenience of illustration,
1 (not shown in the enlarged view of FIG. 2) is provided intermittently in a linear manner, and a leakage prevention groove 61 is provided. , Are formed longer than the interval T1 between the concave portions 62. This allows
The leakage preventing effect and the effect of improving the fitting property by forming a structure that is easily bent in the longitudinal direction and the flexible shaft in the width direction can be obtained in a well-balanced manner.

More specifically, the ratio of the interval T1 between the concave portions 62 and the length L1 of the concave portions 62 in the linear direction (interval / length)
Is from 0.1 to 0.
9, and more preferably 0.2 to 0.1.
7

Further, a large number of recesses are intermittently arranged linearly in the width direction of the sanitary napkin 1 so that the width direction leakage preventing grooves 64, 6 are formed.
4 'is formed. As shown in the enlarged view of the width direction leakage prevention groove 64 in FIG. 3, also in the width direction leakage prevention groove 64, similarly to the leakage prevention groove 61, the length L2 of the concave portion is formed longer than the interval T2. It is preferable in terms of leakproofness and fit. In the present embodiment, the two leak-proof grooves 61 are curved in a V-shape on the inner side of the sanitary napkin at the positions where the flaps 8 are located along both sides in the longitudinal direction. Has been formed. Further, the front-side width direction leakage prevention groove 64 ′ has an end located near the curved bending point of the leakage prevention groove 61, and is curved so as not to be connected. The direction-preventing groove 64 is
1 to connect the rear end portions 61a, 61a,
It is curved. As described above, the width direction leakage prevention groove 64,
By providing 64 ', rigidity in the width direction can be increased to prevent twisting. In addition, it is preferable to connect the leakage preventing groove 61 and the width direction leakage preventing groove 64 from the viewpoint of leakage prevention. Here, the leak-proof groove 61 means a portion of the groove formed along the longitudinal direction of the absorbent article, and specifically, the angle between the longitudinal center line and the tangent to the groove is less than 45 °. The width direction leakage prevention groove 64 means a groove in which the angle between the longitudinal center line and the tangent to the groove is 45 ° or more.

It is preferable that the length L1 in the linear direction of each concave portion 62 of the leakage preventing groove 61 is larger than the linear length L2 of each concave portion 65 of the width direction leakage preventing groove 64. By making L1 larger than L2, the rigidity of the entire sanitary napkin is well-balanced, and the fit and the wearing feeling are improved. Also,
The length L1 is preferably set to 0.5 to 6 mm from the viewpoint of improving the leak-proof property and the fitting property by appropriate bending property. The length L2 is preferably 0.2 to 4 mm from the viewpoints of leakproofness, prevention of twisting due to rigidity in the width direction, and feeling of the user's skin.

Further, from the viewpoint of leakproofness and appropriate flexibility, the interval T1 between the recesses 62 in the leakproof groove 61 is
It is preferably 0.5 to 6 mm, more preferably 1 to 6 mm.
The gap T2 between the concave portions 65 in the width direction leakage prevention groove 64 is preferably 0.2 to 4 mm, and more preferably 0.5 to 3 mm. The difference between the interval T1 between the concave portions 62 in the leakage preventing groove 61 and the interval T2 between the concave portions 65 in the width direction leakage preventing groove 64 is preferably 0.3 to 3 mm.

As shown in FIGS. 2 and 3, the recesses 62 and 65 are formed in parallel with the length direction of the leakage preventing groove 61 and the width direction of the leakage preventing groove 64, respectively. Each recess 62, 6
5 is formed in a direction parallel to the length direction of the leakage preventing groove 61 and the width direction leakage preventing groove 64. That is, each recess 6
Reference numerals 2 and 65 each have a rectangular shape. Also, gaps 63, 66 located between the recesses 62, 65
Have a rectangular shape, similarly to the concave portions 62 and 65, respectively. The depth of the concave portion 62 and the concave portion 65 is 1 to 10 mm.
It is preferred that Further, it is preferable that the gaps 63 and 66 are also depressed as compared with portions other than the leakage preventing groove and the width direction leakage preventing groove. The length and width of each recess and the interval between the recesses may be measured with the naked eye using a ruler or the like, but is preferably measured using an optical microscope. In the present embodiment, an optical microscope manufactured by OLYMPUS (trade name “SZH1
0 ”) and a SONY CCD camera (trade name“ CCD-I
RIS ") and connect it to a 10-20x magnification,
Furthermore, a SONY color video printer (product name "UP
−5100A ”) was connected to the printed photo. Here, the length and width of the concave portion are measured on the bottom surface of the concave portion of the leakage preventing groove. The interval between the concave portions is obtained by measuring the length from the end of the bottom surface of the concave portion to the end of the bottom surface of the adjacent concave portion along the linear direction of the leakage preventing groove. Further, the depth of the leak preventing groove is obtained by measuring the cross section of the leak preventing groove by the above-described device.

In the present embodiment, the width of the leakage preventing groove 61 is wider than the width of the leakage preventing groove 64 in the width direction. Specifically, it is preferably 3 to 15 cm, more preferably 3 to 10 cm in the longitudinal direction around the excretion point at the time of use in the absorbent article,
More preferably, the width of the leakage prevention groove 61 located in the region of 5 to 8 cm is preferably wider than the width of the end of the width direction leakage prevention groove 64. It is preferable that the width of the leakage preventing groove 61 gradually changes from a wide portion to a narrow portion, or that the narrow portion has a constant width. In the present embodiment, the size of the width is not limited in other portions. As described above, the entire width of the leakage prevention groove 61 does not need to be wider than the end width of the width direction leakage prevention groove 64, and only a part of the width is sufficient. By making the width of the leak preventing groove 61 larger than the width of the width direction leak preventing groove 64, both sides of the groove contact or approach each other at the upper position or the central position of the groove at the time of use, and the excreted liquid Does not easily move, and the liquid stopping effect of the groove is sufficiently exhibited. Further, the impression of the leakage preventing effect of the leakage preventing groove 61 is not weakened as compared with the width direction leakage preventing groove 64. Such an effect is obtained when the absorption structure composed of hydrophilic fibers such as pulp and rayon, absorbent polymers, synthetic fibers subjected to hydrophilic treatment, foams / aggregates, etc. is thick or has a high basis weight. Is more noticeable.

The width of the leak preventing groove 61 and the width direction of the leak preventing groove 64 means the width at the bottom of the groove. Specifically, the maximum width of the leak preventing groove 61 is preferably 2 to 12 mm. Preferably, the width is 4 to 8 mm, and the width direction leakage prevention groove 64 is 1 to 8 mm.
And more preferably 2 to 4 mm. Also,
The difference between the width of the leak preventing groove 61 and the width of the width direction leak preventing groove 64 is 1 to
It is preferably 6 mm. From the viewpoints of the liquid stopping effect, the feeling of wearing, and the visual impression of these effects to the user, it is preferable to be within the above range. In addition, the excretion point differs depending on the size and use of the absorbent article, but is generally used by those skilled in the art. Often formed to fit.

Each constituent member of the sanitary napkin of the present embodiment is formed using the same forming material as a normal sanitary napkin.
Can be formed.

The sanitary napkin of this embodiment can be used in the same manner as a normal sanitary napkin. And since the sanitary napkin of this embodiment is comprised as mentioned above, the part which should be flexible can be made flexible and sufficient rigidity can be provided to the part which needs rigidity. For this reason, the sanitary napkin of the present embodiment is provided with sufficient flexibility and stiffness to a site where flexibility and rigidity are required, has a good fit, and can sufficiently control fluid bleeding.

In the sanitary napkin of the present embodiment, the absorbent layer 2 and the leak-proof layer 3 are formed according to a conventional method, then the two layers are bonded together, and then embossed from the surface side of the absorbent layer 2. Thus, it can be manufactured by forming the leakage preventing groove 61 and the width direction leakage preventing groove 64, or the like.

The absorbent article of the present invention is not limited to the above-described embodiment, but can be variously modified without departing from the spirit of the present invention. For example, the present invention is applicable to disposable diapers, incontinence pads, and the like, in addition to sanitary napkins. Further, in the above-described embodiment, an example in which the entirety of the leak preventing groove 61 and the width direction leak preventing groove 64 are formed with the above-described ratio has been described by way of example. However, the present invention is not limited thereto. It is sufficient that the ratio is satisfied in at least a part of the width direction leakage prevention groove 64. Further, the widthwise leakage prevention groove 64 does not need to be connected to the leakage prevention groove 61, and may be provided so that both ends are located at positions near each other.

Further, as shown in FIG.
It can also be one of one. In this case, as shown in FIG. 4, it is preferable that the width of the groove is in the range of 2 to 15 mm. In addition, the central portion 6 of the leakage preventing groove 61 is more than the end portion 61a.
It is preferable that 1b (the portion having the maximum width) be wider. That is, it is preferable that the width of the leakage prevention groove is increased from the end 61a toward the center 61b. In this case, it is preferable that the widest position is located at a position having a length of 8 to 15 cm from the front edge of the absorbent article. Part 61a
Is preferably 2 to 6 mm thicker than the width. It is preferable that the front end 61a is located at a position 3 to 10 cm from the front end of the absorbent article.

[0021]

Industrial Applicability The sanitary napkin of the present invention is provided with sufficient flexibility and / or rigidity at a site where it is required, has good fit, and can sufficiently control fluid bleeding. .

[Brief description of the drawings]

FIG. 1 is a partially broken plan view showing a sanitary napkin as one embodiment of an absorbent article according to the present invention.

FIG. 2 is an enlarged view of a part X in FIG. 1;

FIG. 3 is an enlarged view of a Y part in FIG. 1;

FIG. 4 is a plan view showing another embodiment of the absorbent article of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Sanitary napkin (absorbent article) 2 Absorbing layer 21 Surface sheet 22 Absorber 3 Leakproof layer 31 Leakproof sheet 32 Skin contact sheet 61 Leakproof groove 62 Depression 63 Gap 64 Width direction leakproof groove 65 Depression 66 Gap 8 flap

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) A61F 5/44 (72) Inventor Harumi Tezuka 2606 Kabane-cho, Akabanai, Haga-gun, Tochigi Pref. ) Inventor: Mutsumi Kuroda 2606, Kabashi-cho, Akaga-cho, Haga-gun, Tochigi Pref. (72) Inventor Minoru Minato 2606, Akabane, Kaga-cho, Haga-gun, Tochigi Pref. AA01 CA01 4C098 AA09 CC05 CC07

Claims (5)

[Claims] 1. A substantially vertically absorbent article having a liquid-retentive absorbent layer and a liquid-impermeable leakproof layer, wherein a number of recesses are intermittently formed along the longitudinal direction of the absorbent article. An absorbent article, wherein a leakage-preventing groove formed in a line is provided on the surface of the absorbent article, and a length of the recess in the linear direction is longer than an interval between the recesses. 2. The absorbent article according to claim 1, wherein a ratio (interval / length) of an interval between the concave portions and a length in a linear direction of each concave portion is 0.1 to 0.9. 3. The absorbent article according to claim 1, further comprising a widthwise leak-proof groove formed by intermittently arranging a large number of recesses in the widthwise direction of the absorbent article. Absorbent articles. 4. The absorbent article according to claim 3, wherein the length of each of the recesses of the leak-proof groove in the linear direction is larger than the length of each of the recesses of the width-direction leak-proof groove in the linear direction. 5. The absorbent article according to claim 3, wherein said width direction leakage preventing groove is connected to said leakage preventing groove.