JP4148620B2 - Absorbent articles - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an absorbent article having excellent leakage prevention properties and excellent wearing feeling.
[0002]
[Prior art and problems to be solved by the invention]
Conventionally, in order to improve leakage prevention properties, various absorbent articles in which a leak-proof groove is formed in a liquid-retaining absorbent layer have been proposed (Japanese Patent Laid-Open No. 9-108262, etc.).
However, in the absorbent article having such a conventionally proposed leak-proof groove, it may appear that there is no groove, and there may be no sense of security because it appears to be ineffective. In addition, there is a problem that the leakage groove is crushed and leaks during wearing.
[0003]
Therefore, the object of the present invention is to have good visibility of the leak-proof groove, there is a sense of effectiveness and security, and the leak-proof groove is not crushed even when worn, and the absorbency is excellent in leak-proof property. To provide an article.
[0004]
[Means for Solving the Problems]
The present invention has a liquid-retaining absorbent layer and a liquid-impermeable leak-proof layer, and in a substantially vertically long absorbent article, the skin contact surface side of the absorbent layer is on both sides in the longitudinal direction. A pair of leak-proof grooves along the width direction and a width-direction leak-proof groove along the width direction are formed, and the width of the leak-proof groove is wider than the width of the width-direction leak-proof layer. The object is achieved by providing an article.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a preferred embodiment of the present invention will be described.
As shown in FIG. 1, the sanitary napkin as the absorbent article according to the first embodiment has a liquid-retaining absorbent layer 2 and a liquid-impermeable leak-proof layer 3, and is substantially vertically long. .
[0006]
In the sanitary napkin 1 of the present embodiment, the absorption layer 2 includes a liquid-permeable top sheet 21 and a liquid-retaining absorbent body 22.
Moreover, the left and right both sides of the surface sheet 21 are wound around the back surface side of the first absorber 23.
The leak-proof layer 3 includes a liquid-impervious leak-proof sheet 31.
The absorption layer 2 and the leak-proof layer 3 are bonded via an adhesive.
[0007]
In the sanitary napkin 1 of the present embodiment, a pair of left and right flaps 8 formed by extending the leak-proof layer 3 outward in the width direction are biased toward the front side. Moreover, although not shown in figure, the adhesive agent is apply | coated to the back surface side of the leak prevention layer 3 to which the back surface side of the flap 8 and the absorption layer 2 were adhere | attached, and the article fixing | fixed part is formed.
[0008]
Thus, in the sanitary napkin 1 of the present embodiment, on the skin contact surface side of the absorbent layer 2, a pair of leak-proof grooves 61 along the longitudinal direction and a width-direction leak-proof groove 64 along the width direction, 64 'is formed, and the width of the leak-proof groove 61 is wider than the width of the width-direction leak-proof grooves 64, 64'. Specifically, the leak-proof groove 61 is preferably 3-15 cm, more preferably 3-10 cm, and still more preferably 5-8 cm in the longitudinal direction around the excretion point during use in the absorbent article. Is preferably wider than the width of the end portion of the width direction leakage preventing groove 64.
The leak-proof groove in the conventional absorbent article makes it easy for the excreted liquid to move because the side portions of the groove contact or approach at the upper position or the center position in the depth direction of the groove due to the pressure during use. In some cases, the liquid stop effect of the groove may not be sufficiently exhibited, and the impression of the leakage prevention effect of the leakage prevention groove may be weaker than that of the width direction leakage prevention groove. However, in the present embodiment, since the width of the leak-proof groove 61 is wider than the width of the width-direction leak-proof groove 64, the leak-proof groove 61 is excellent in leak-proof property, the visibility of the leak-proof groove 61 is increased, and the sense of security is improved. In addition, by improving the rigidity by each leak-proof groove, the balance of rigidity in the front, rear, left and right becomes good and the wearability is excellent. Such effects are such that the thickness of the absorbent structure composed of hydrophilic fibers such as pulp and rayon, absorbent polymers, hydrophilized synthetic fibers, foams / aggregates, etc. is thick or has a high basis weight. More effective in some cases.
[0009]
Moreover, it is preferable that the width of the leak-proof groove 61 gradually changes from a wide portion to a narrow portion, or the narrow portion has a constant width. And in this embodiment, the magnitude | size of a width | variety is not restrict | limited in parts other than this. Thus, the entire leakproof groove 61 does not have to be wider than the end width of the widthwise leakproof groove 64, and a part of the leakproof groove 61 only needs to be wide.
[0010]
Specifically, the maximum width of the leakage prevention groove 61 (the width of the widest portion) is preferably 2 to 12 mm, more preferably 4 to 8 mm, and the width of the width direction leakage prevention groove 64. Is preferably 1 to 8 mm, and more preferably 2 to 4 mm. Moreover, it is preferable that the difference between the maximum width of the leakage preventing groove 61 and the width of the width direction leakage preventing groove 64 is 1 to 6 mm.
By setting the maximum width to 2 to 12 mm, a liquid stop effect by the groove can be obtained, and a sufficient sense of security can be given to the user. By setting the width of the width direction leakage preventing groove 64 to 1 to 8 mm, the leakage preventing effect in the front-rear direction is further improved. By setting the difference to 1 to 6 mm, the side / front-and-rear direction liquid stop effect is further improved, and there is no hindrance to fit due to the formation of the flexible shaft.
Moreover, the leak-proof groove 61 is formed so as to have the maximum width in the wearer's excretory part contact region. Here, the excretion part contact region means a part designed to contact the excretion part of the wearer. In the present embodiment, the absorbent layer 2 corresponding to the portion where the flap 8 exists and the portion in the vicinity in the front-rear direction correspond to the absorbent layer 2.
[0011]
In the present embodiment, the two leak-proof grooves 61 are curved in a U-shape along the both sides in the longitudinal direction on the inner side of the sanitary napkin at the portions where the flaps 8 are located on both sides in the longitudinal direction. Has been formed.
Further, the width direction leakage preventing groove 64 ′ on the front side is located in the vicinity of the curved bending point of the leakage preventing groove 61 and is curved so as not to be connected. The direction leakage preventing groove 64 is curved so as to connect the end portions 61 a and 61 a on the rear portion side of the leakage preventing groove 61. That is, the width direction leak-proof groove 64 in the rear part is connected to the leak-proof groove 61.
Thus, by providing the width direction leakage prevention grooves 64 and 64 ′, the rigidity in the width direction can be increased to prevent twisting. Moreover, it is preferable from a leak-proof viewpoint to connect the leak-proof groove 61 and the width direction leak-proof groove 64.
Here, the leak-proof groove 61 means a portion of the groove formed along the longitudinal direction of the absorbent article. Specifically, the angle formed by the longitudinal center line and the tangent of the groove is less than 45 °. The width direction leak-proof groove 64 means a groove having an angle of 45 ° or more between the longitudinal center line and the tangent line of the groove.
[0012]
As shown in FIGS. 1 to 3, each of the leak-proof groove 61 and the width-direction leak-proof groove 64 has a large number of recesses 62 and 65 (for convenience of illustration, FIG. (Shown in the figure) are arranged in a linear manner, and the ratio (interval) between the intervals T1, T2 between the recesses 62, 65 and the lengths L1, L2 of the recesses 62, 65 in the linear direction. / Length) is 0.1 to 0.9, preferably 0.2 to 0.7, from the viewpoint of leakage prevention effect and fit.
As in this embodiment, a large number of recesses are formed in the leak-proof groove, so that the leak-proof property is improved by the liquid diffusion preventing effect of the recesses, and an appropriate rigidity can be obtained. improves.
[0013]
The length L1 in the linear direction of each recess 62 of the leak-proof groove 61 is preferably larger than the length L2 in the linear direction of each recess 65 of the width-direction leak-proof groove 64. By making L1 larger than L2, the balance of the rigidity of the sanitary napkin as a whole is good, and the fit and wearing feeling become good.
In addition, the length L1 is preferably set to 0.5 to 6 mm from the viewpoint of improvement in fit due to leakage prevention and appropriate bendability.
The length L2 is preferably 0.2 to 4 mm from the viewpoints of leakage prevention, prevention of twist due to rigidity in the width direction, and the feeling of the user's skin.
[0014]
In addition, from the viewpoint of leakage prevention and moderate flexibility, the interval T1 between the recesses 62 in the leakage prevention groove 61 is preferably 0.5 to 6 mm, more preferably 1 to 4 mm. The interval T2 between the recesses 65 in the width direction leakage preventing 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 recesses 62 in the leak-proof groove 61 and the interval T2 between the recesses 65 in the width direction leak-proof groove 64 is preferably 0.3 to 3 mm.
Further, the interval T1 between the recesses 62 in the leakage preventing groove 61 is preferably larger than the interval T2 between the recesses 65 in the width direction leakage preventing groove 64.
[0015]
As shown in FIGS. 2 and 3, the recesses 62 and 65 are formed in parallel to the length direction of the leakage prevention groove 61 and the width direction leakage prevention groove 64, respectively.
Each of the recesses 62 and 65 is formed in a direction parallel to the length direction of the leakage prevention groove 61 and the width direction leakage prevention groove 64. That is, each of the recesses 62 and 65 has a rectangular side shape.
Further, the gaps 63 and 66 positioned between the recesses 62 and 65 are rectangular like the recesses 62 and 65, respectively.
Moreover, it is preferable that the depth of the recessed part 62 and the recessed part 65 is 1-10 mm.
Furthermore, it is preferable that the gaps 63 and 66 are also recessed as compared with portions other than the leakage prevention groove and the width direction leakage prevention groove.
In addition, although the length and width of each recessed part and the space | interval of a recessed part may be measured using a ruler etc. with the naked eye, Preferably, it measures using an optical microscope. In this embodiment, a Sony CCD camera (trade name “CCD-IRIS”) is connected to an optical microscope (trade name “SZH10”) manufactured by OLYMPUS, and magnified to about 10 to 20 times. Measurement was performed from a photograph printed by connecting a video printer (trade name “UP-5100A”).
Here, the length and width of the recess are measured at the bottom surface of the recess of the leak-proof groove. The interval between the recesses is a length measured from the end of the bottom surface of the recess to the end of the bottom surface of the adjacent recess along the linear direction of the leak-proof groove. The depth of the leak-proof groove is obtained by measuring the cross-section of the leak-proof groove with the above-described apparatus.
[0016]
Each component of the sanitary napkin of this embodiment can be formed using the same forming material as a normal sanitary napkin.
[0017]
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 visibility of a leak-proof groove is good, there exists an effect and a feeling of relief, and even if it wears, a leak-proof groove is crushed. No leakage and excellent leakage prevention.
[0018]
The sanitary napkin according to this embodiment is formed by forming the absorbent layer 2 and the leak-proof layer 3 according to a conventional method, and then bonding them together, and then embossing from the surface side of the absorbent layer 2. It can be manufactured by forming the leakage groove 61 and the width direction leakage prevention groove 64.
[0019]
In addition, the absorbent article of this invention is not restrict | limited to the above-mentioned embodiment, It can change variously in the range which does not deviate from the meaning of this invention.
For example, in addition to sanitary napkins, it can be applied to disposable diapers, incontinence pads, and the like.
Further, in the above-described embodiment, it has been described that a part of the leak-proof groove 61 needs to be wider than a part of the width-direction leak-proof groove 64. The width may be wider than the entire width of the width direction leakage prevention groove 64.
[0020]
Moreover, it can also be set as a form as shown in FIG.
That is, the leak-proof groove and the width-direction leak-proof groove each have a large number of intermittently formed recesses 61b, and the leak-proof groove 61 has the maximum width in the wearer's excretory part contact region. It is formed as follows.
The recesses 61b are each formed in a heart-shaped pattern.
In the present embodiment, in addition to the effect obtained by having the recess formed in the leak-proof groove in the embodiment shown in FIGS. Since the visibility of the concave portion is improved, it is effective when the leakage preventing grooves are provided on both sides of the excretory portion contact region. Further, in the present invention, since the leak-proof groove is wider than the width-direction leak-proof groove, formation and visual recognition of the concave portion are further facilitated. In addition, in this embodiment, the shape of the recessed part which is the pattern in a groove | channel is not limited to this, It can be set as shapes, such as a star shape and a diamond shape, and various forms, such as putting in multiple rows, etc. Can be adopted.
[0021]
【The invention's effect】
The absorbent article of the present invention has good visibility of the leak-proof groove, is effective and secure, and the leak-proof groove is not crushed even when worn, and has excellent leak-proof properties. is there.
[Brief description of the drawings]
FIG. 1 is a partially broken plan view showing a sanitary napkin as one embodiment of an absorbent article of the present invention.
FIG. 2 is an enlarged view of a portion 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]
1 Sanitary napkin (absorbent article)
2 Absorbing layer 21 Top sheet 22 Absorber 3 Leak-proofing layer 31 Leak-proofing sheet 32 Skin contact sheet 61 Leak-proofing groove 62 Recessed part 63 Gap part 64 Width direction leak-proof groove 65 Recessed part 66 Gap part 8 Flap

Claims (3)

In an absorbent article that has a liquid-retaining absorbent layer and a liquid-impermeable leak-proof layer and is substantially vertically long,
On the skin contact surface side of the absorbent layer, a pair of leakage prevention grooves along the longitudinal direction and a width direction leakage prevention groove along the width direction are formed,
The width of the leakage prevention groove is formed wider than the width of the width direction leakage prevention groove ,
The leakage prevention groove and the width direction leakage prevention groove are each formed by disposing a large number of recesses intermittently in a linear shape, and the length of each recess of the leakage prevention groove in the linear direction is: An absorbent article that is larger than the length of each of the recesses in the width direction in the linear direction .   The absorbent article according to claim 1, wherein the leak-proof groove in the width direction is connected to the leak-proof groove.   The absorbent article according to claim 1, wherein the leak-proof groove is formed to have a maximum width in a wearer's excretory part contact region.

Images