JPS6034273Y2 - sanitary napkin - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a sanitary napkin that is easily deformed regularly when worn.

When this type of napkin is worn, it is compressed between the wearer's crotch, so the width of the central region becomes narrow, and from there to the rear end region, the napkin deforms into a mountain shape. The central region receives the most concentrated deformation stress, so
There are various deformations, and as a result, the absorbent surface in the central region has poor adhesion to the genitals of the wearer, causing leakage of menstrual blood.

In conventional napkins, no particular consideration has been taken to effectively solve this problem.

In view of the above-mentioned problems, the purpose of the present invention is to provide a sanitary napkin that is structured so that when worn, it deforms regularly and comes into close contact with the genitals of the wearer to absorb menstrual blood. To achieve this purpose, the main structure of the present invention is that a vertically flat shape-retaining piece that is water-permeable and easy to bend toward the absorbent surface is placed in the central part of the inside of the napkin. A sanitary napkin characterized in that:

FIG. 1 is a longitudinal cross-sectional view of a napkin to which the present invention is applied and schematically shows its structure, and FIG. 2 is a cross-sectional view of the napkin taken along line A--A in FIG.

Inside the absorbent body 2 located inside the napkin 1, a longitudinally flat shape-retaining piece 3 is disposed which is water permeable and easily bendable toward the absorbent surface 1a.

The position in the thickness direction of the absorbent body 2 is preferably the upper half layer, but may be the lower half layer or even the lower surface depending on the case.

Various materials can be used for the holding piece 3, but as shown in FIG. 3A, the upper layer 4 is made of a material with low rigidity, such as a nonwoven fabric, and the lower layer 5 is made of a material with high rigidity and resilience. , for example, an elastic continuous foam sheet, preferably a polyethylene sheet, is provided, and these are integrated into a composite,
Alternatively, as shown in FIG. 3B, grooves 7 are carved on the upper surface of the polyethylene sheet 6 at required intervals.

When the foam sheet is used, hematopoietic holes are formed as necessary.

The bending resistance of the holding piece 3 is 1 to 50 f-cm, preferably 5 to 50 f-cm.
It has a bending moment of 459*an, more preferably 20 to 40 f-cm.

If the bending moment is less than 1 g-0, there will be no shape retention function, and if the bending moment is more than 50 g cm, the napkin will become too hard in the area where the shape retention piece 3 is located, making it difficult to bend easily when worn. decreases, giving the wearer a feeling of a foreign body.

The thickness of the holding piece 3 depends on its material, but is generally preferably 5TrrIn or less, and if it is more than that, the amount of material of the conventional absorbent body 2 will decrease, which is not preferable.

As shown in FIG. 3, the shape retaining piece 3 has a vertical L□ of 50 to 50.
90Tra1 preferably 70~8-・Horizontal W1 is 20~4
It has a contour size formed with each length of 0 mm, preferably 25 to 35 mm, and is disposed in the lateral center of the napkin 1 so as to be biased toward the front end side.

Further, the preferable position thereof depends on the size of the napkin 1, but considering the size generally used in practical use, the distance from the front end 7 of the napkin 1 to the front end of the shape-retaining piece 3 is 25 to 35. The kite is preferably around 30 mm, and the distance L3 from the rear end 8 of the napkin 1 to the rear end of the shape-retaining piece 3 is 6.
0-9-1 Preferably around 70 mm, distance W2 from side edge 9 of napkin 1 to side wall of shape-retaining piece 3 is 10-25 mm
, preferably around 20 cabinets.

As described above, in this invention, the central area inside the napkin, which is the most important area for absorbing menstrual blood and where deformation stress is concentrated when worn, has the necessary stiffness and bendability to the absorption surface. Since the vertically flat shape-retaining pieces 3 having restoring elasticity are arranged in a flat shape, the absorbent surface in the central region is less likely to deform irregularly, and a relatively flat absorbent surface is maintained when worn. Napkins that are folded in packaging generally have relatively large wrinkles on the used surface, but when the napkin is opened flat, the shape-retaining pieces inside Due to the restoring elasticity of No. 3, most of the large wrinkles are eliminated, and as a result, the cause of menstrual blood leakage can be reduced.

Moreover, since the shape-retaining piece 3 having the required bending resistance is present at the above-mentioned position, a difference in bending resistance occurs between the area where the form-retaining piece 3 is located and the other areas, especially There is also the effect that when the both side regions of the shape-retaining piece 3 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 the drawing]

Fig. 1 is a partially cutaway vertical sectional view of a napkin showing an embodiment of the present invention, Fig. 2 is a sectional view taken along line A-A, Figs. FIG. 5 is a plan view showing the size and position of the shape-retaining piece in the napkin. 1... Napkin, 2... Absorber, 3.
...Model retaining piece.

Claims (1)

[Scope of utility model registration request] A sanitary napkin in which a longitudinally flat shape-retaining piece that is water-permeable and has easy bendability toward the absorbent surface is arranged in a flat shape in the center of the napkin, wherein the shape-retaining piece is made of open foam that has at least restoring elasticity. The shape-retaining piece is made of a sheet, the size of the shape-retaining piece is 50 to 90 mm in length, 20 to 40 mm in width, and 5 mm or more in thickness, and is located biased toward the front end of the napkin, and the shape-retaining piece has a bending resistance. A sanitary napkin characterized by having a bending moment of 1 to 50 g·cm.