JPS5925372Y2 - sanitary napkins - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sanitary napkin featuring an internal absorbent body.

The absorbent material of conventional napkins is made by laminating cotton-like pulp, multiple sheets of thin absorbent paper, or cotton-like valve seats, or water-absorbing papers that overlap in the center parallel to the napkin's longitudinal direction. It had a trifold structure.

Napkins with this type of structure have equal thickness on both sides and the center, or are thicker in the center than both sides, so they are not suitable for the female private parts, and are not suitable for use as absorbents. When the material used in the napkin becomes wet with menstrual blood, it does not lose its strength and bulk as a sheet, and the napkin as a whole does not lose its elasticity, causing the napkin to become undone while being worn.

Even if the napkin were slightly twisted in this manner, a conventional napkin having a thickness of 5 mm or more, for example, could sufficiently function as a napkin.

However, with the recent development of super absorbent materials, it is no longer necessary to use large quantities of cotton pulp and absorbent paper as in the past.
When the thickness of the napkin is, for example, 5 mm or less, twisting during wearing becomes a major problem, and the napkin cannot function as a napkin.

Furthermore, conventional napkins have a width of 70 mm or more, whereas the average distance between the legs of a female body is 60 to 65 mm.
And when the legs are closed, it is 50 mm or less.

Therefore, when a conventional napkin having a width of 70 mm or more is worn, the napkin is pinched between the legs and crushed, resulting in a convex central portion.

This is not a particular problem if the napkin is 5 mm or more thick, but if the napkin is less than 5 mm thick and the width is slightly narrower than 70 mm, the center part tends to become convex. is large, and so-called lateral leakage of menstrual blood is likely to occur.

The purpose of this invention is to have the same elasticity as conventional napkins even if the thickness is thinner, to not lose elasticity or twist even when wet with menstrual blood, and to have both sides thicker than the center. The purpose of the present invention is to provide a sanitary napkin that has advantages such as good compatibility with the private parts of the female body, and the configuration for achieving this purpose is explained below based on the illustrated embodiment. .

The absorbent body 1 of the napkin of the present invention is made of a sheet 2 of hydrophilic nonwoven fabric or hydrophilic foam (preferably one with open cells) having a wet strength and a width of 3W+α. It is constructed by bending both sides inward and downward, leaving a width of 2W, and then bending both sides in the same direction as the beginning, leaving a width W inside the center (0 < α × W).

In the absorbent body 1 constructed in this manner, a concave groove 3 is formed in the longitudinal direction of the central portion, the central bent portions 4 of the lower surface are parallel to the longitudinal direction and touch each other, and the new bent portions 5 on both sides are made of a quadruple layer. It has become.

Such an absorbent body 1 is used alone or together with an appropriate absorbent material. For example, as shown in FIG. The napkin is constructed by positioning the transparent sheet 6, surrounding the whole with a water-permeable sheet 7, and joining both lengthwise ends 8 by means such as thermocompression bonding.

As mentioned above, the present invention uses a hydrophilic nonwoven fabric or a hydrophilic foam sheet 2 with wet strength as the material for the absorbent body 1, so when it becomes wet with menstrual blood, the strength and bulk of the sheet decrease. In addition, since both sides of the absorbent body 1 are folded to form a quadruple layer, even if the napkin is thinner than a conventional napkin, elasticity is imparted to the napkin as a whole. There is no twisting while wearing it.

In addition, since the concave groove 3 is provided in the longitudinal direction of the central part of the absorbent body 1, the central part of the skin-contacting surface of the napkin becomes a concave surface, which improves the adaptability of the napkin to the private parts of the female body and prevents leakage of menstrual blood. This does not occur and is extremely useful for practical use.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a napkin using an absorbent body according to an embodiment of the present invention, with the approximate center section cut away, and FIG. 2 is an explanatory diagram showing the order of folding sheets to construct the absorbent body. DESCRIPTION OF SYMBOLS 1...Absorber, 2...Nonwoven fabric or sheet, 3...Concave groove, 5...Both sides.

Claims (1)

[Scope of utility model registration request] Width 3W 10α where the absorber has the wet strength of at least one sheet
It is made of a hydrophilic non-woven fabric or a hydrophilic foam sheet, and both sides of the sheet are bent inward and downward, leaving a width of 2 W at the center of the sheet, and furthermore, a width of W is left at the center of the sheet. Both sides of the sheet are bent inward and downward, so that
A concave groove is formed in the longitudinal direction of the central part of the sheet, and
A sanitary napkin characterized in that the central bent portions of the lower surface of the sheet touch each other parallel to the longitudinal direction, and the bent portions on both sides of the sheet form a four-layer structure.