JPS6041224Y2 - sanitary napkins - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sanitary napkin characterized by the structure of the fastening portion for wearing shorts.

In conventional sanitary napkins that have been put into practical use, in order to prevent the napkins from slipping when worn, adhesive fixing parts are provided on the non-absorbing surface of menstrual blood, that is, the non-contact surface.

The position, shape, and size of this fastening part on the non-absorbent surface vary, but in conventional napkins, no particular consideration has been given to the bending resistance of this fastening part, and this fastening part The bending resistance of the adhesive layer itself is 1g-
It has a bending moment of less than cm.

On the other hand, the nonwoven fabric that is generally used as the surface material of napkins is of low age for reasons such as economic efficiency, so the fastening area provided thereon also has low bending resistance. .

If the fastening part with low bending resistance is provided in the front end region or the rear end region where deformation stress does not occur much when the napkin is worn, there is no problem in separately installing it, If the napkin is provided in the central region, which is most important for securing the napkin to the shorts, the central region is the area where deformation stress is most concentrated when the napkin is compressed between the wearer's crotch. As a result, the fastening portion may also be deformed or creases may develop, resulting in decreased adhesion to the shorts, and the napkin may slip from the shorts.

In order to effectively solve this problem, it is necessary to consider not only the bending strength scale of the fastening part, but also the performance of the adhesive constituting the fastening part and the material such as non-woven fabric for the non-absorbent surface of the napkin on which it should be installed. There must be.

However, according to the research conducted by the present inventors, the bending resistance of the fastening part is the most important and indispensable factor in effectively solving the above problem when it is provided in the central region of the napkin. It was found that this is a requirement.

In addition, the position, form, and size of the fastening portion should also be determined.
It has also been found that this is an important and essential requirement for ensuring stable adhesion of the napkin to the shorts worn.

Therefore, the gist of the present invention is a sanitary napkin in which the non-absorbent surface is provided with a fastening part made of an adhesive material, and the fastening part is 50 to 90771771 in length and 10 in width.
The adhesive layer has a surface area formed with a length of ~3ONn, is located in the lateral center of the napkin and is biased toward the front end, and has a rigidity of the adhesive layer constituting the fastening part. Softness is 5-5
The object of the present invention is to provide one having a bending moment of 0 g·0.

Further, the present invention will be explained based on the illustrated embodiments.
It is as follows.

1 and 2 are perspective views of the sanitary napkin cut in the transverse direction, omitting the internal structure of the sanitary napkin.

The surface of the napkin 1 is covered with a nonwoven fabric, similar to napkins that are generally known and are in practical use.

In the embodiment shown in FIGS. 1 and 2, a fastening portion is provided on the non-absorbent surface of the napkin 1.

The fastening part 2 in the embodiment shown in FIG. 1 is constituted by an adhesive layer formed by applying an adhesive 4 to both sides of a high-quality paper 3 as a base material of the tape, and the fastening part 2 in the embodiment shown in FIG. The attachment part 2 is constituted by an adhesive layer formed by directly applying a hot-melt adhesive 5 to the nonwoven fabric.

This fastening part 2 is composed of the adhesive layer itself,
That is, a layer consisting of a tape base material 3 and an adhesive 4, particularly a layer consisting of the base material itself, and a layer consisting of a hot melt adhesive 5,
The bending resistance of the adhesive layer excluding the nonwoven fabric and the release Q-Pro applied to the fastening part 2 to protect it is preferably 5 to 45 g-al, more preferably 20 to 40 g-c.
It has a bending moment of m, 59-Cy7
When the bending moment is 1 or less, the bending strength is not much different from the fastening part of conventional napkins, and it is 50 g cm.
If the bending moment exceeds the above, the napkin 1 in the area where the fastening portion 2 is located becomes hard and cannot deform naturally when worn.

As shown in FIG. 3, the fastening portion 2 has a length L1 of 50 to 50
90TIUn1 preferably 70-81Ib-lateral W1 is 1
It has a surface area formed with a length of 0 to 30 yrvn, preferably 15 to 25 yrvn, and is located at the lateral center of the napkin 1 and offset toward the front end 7 side. There is.

Further, as for the preferable position, the distance L2 from the front end 7 of the napkin 1 to the front end of the fastening part 2 is 25 to 35 mm, depending on the size of the napkin 1, but considering the size generally used in practical use. Me, preferably around 3ONrL,
The distance from the rear end 8 of the napkin 1 to the rear end of the fastening part 2 is 60 to 90 TIrIIL1, preferably around 70 m+n,
Distance W2 from side edge 9 of napkin 1 to side edge of fastening part 2
is between 20 and 307rrfn1, preferably around 257rIJn.

As mentioned above, in the present invention, the most important area for fixing the shorts is the absorption area for menstrual blood.
Since the fastening part 2 having the required bending resistance is provided in the central region where deformation stress is concentrated when worn, the drawbacks seen in the conventional napkins mentioned above can be reduced.

Moreover, since the fastening part 2 having the required bending resistance is present at the above position, there is a difference in bending resistance between the area where the fastening part 2 is located and the other areas, especially There is also the effect that when the both side areas of the fastening part 2 are pressed between the wearer's crotch, they are easily deformed regularly and the wearing condition is maintained in a good condition.

Thus, according to the present invention, excellent practical effects can be achieved using extremely simple means.

[Brief explanation of drawings]

1 and 2 are cross-sectional perspective views of a napkin showing each embodiment of the present invention, and FIG. 3 is a plan view showing the size and position of the fastening portion of the napkin. 1... Napkin, 2... Fastening part, 3.
...Tape base material, 4...Adhesive, 5...
...Hot melt adhesive, 6...Release tape.

Claims (3)

[Scope of utility model registration request] (1) In a sanitary napkin in which the non-absorbent surface is provided with a fastening part made of an adhesive material, the fastening part is 50 to 9 degrees in length.
An adhesive layer having a surface area formed by each length of 10 to 3 horizontal lengths, located in the lateral center of the napkin and biased toward the front end side, and constituting the fastening part. The bending resistance of
Said napkin, characterized in that it has a bending moment of ~50'iI-cm. (2) The sanitary napkin according to claim 1, wherein the adhesive layer is constituted by a tape base material and an adhesive coated on both sides of the tape base material. (3) The sanitary napkin according to claim 1, wherein the adhesive layer is made of a hot-melt adhesive.