JPS604496Y2 - sanitary napkin - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a novel sanitary napkin.

More specifically, the present invention relates to a sanitary napkin that eliminates the putrid odor of menstrual blood and has improved absorbency.

Conventionally, as a method of removing the putrid odor of menstrual blood occluded in sanitary napkins, activated carbon-containing paper, in which activated carbon is inserted into a part of the absorbent material, or chlorophyllin paper, in which chlorophyllin is contained in the paper, have been used. Methods of incorporating deodorizing materials are known.

However, in the case of activated carbon-containing paper, the adsorption function and deodorizing effect of activated carbon are significantly diminished because a large amount of water is used in the paper manufacturing process, and in the case of chlorophyllin paper, chlorophyllin is very expensive, so it is not economically viable. Another disadvantage is that the deodorizing material is only partially contained, so that the deodorizing agent cannot be sufficiently deodorized.

However, the inventor of the present invention has conducted various studies in order to provide a new sanitary napkin that eliminates the above drawbacks, prevents the occurrence of menstrual blood odor during and after wearing, and improves absorbency. As a result, we used a heat-treated mat containing heat-adhesive fibers and powdered activated carbon dispersed in pulp as an absorbent material, and applied a dry method nonwoven fabric mainly made of pulp on at least the menstrual blood absorption surface of the absorbent material. By stacking layers and providing brocade-like embossing grooves in the longitudinal direction of the absorbent body and nonwoven fabric on the menstrual blood absorption side, activated carbon can be manufactured without impairing its deodorizing function, has sufficient deodorizing ability, and is highly effective. The inventors discovered that it is possible to provide absorbent sanitary napkins and completed the present invention.

Hereinafter, the sanitary napkin of the present invention will be explained using the drawings.

FIG. 1 is a schematic perspective view showing an embodiment of the sanitary napkin of the present invention, and FIG. 2 is a sectional view taken along the line X--X in FIG. 1.

In Figures 1 and 2, 1 is an absorbent body, 2 is a dry nonwoven fabric mainly made of pulp that is laminated on the menstrual blood absorbing surface 1a of the absorbent body 1, and 3 is the entire surface of the absorbent body 1 excluding the menstrual blood absorbing surface 1a. 4 is a covering material that is integrally wound around the absorbent body 1, nonwoven fabric 2, and waterproof material 3; 5 is a embossed groove provided on the surface of the menstrual blood absorption surface 1a of the absorbent body 1 and the nonwoven fabric 2; It is.

The absorbent body 1 is made of pulp, heat-adhesive fibers, and activated carbon. The pulp used is pulverized pulp, which has been conventionally used as an absorbent material, and the heat-adhesive fibers are fibrillated polyethylene, polyethylene- Low melting point synthetic fibers such as polypropylene composite fibers are preferably used.

Activated carbon may be in any form such as powder, granules, and fibers.

The blending ratio of these is 5% of the heat-adhesive fibers based on the total amount of the absorbent material.
Preferably, the saliva content is ~3% and the activated carbon content is 5-2%.

These are dispersed and mixed and pressed with a roll, with a basis weight of 50~
After making a mat of 300g/rIl, this
Heat treatment is performed by blowing hot air at 160°C.

Through heat treatment, the heat-adhesive fibers or the heat-adhesive fibers and pulp fibers in the absorbent mat adhere to each other to form a net within the mat, and activated carbon, such as powder, is fixed by this net. Furthermore, the activated carbon is also fixed by directly thermally bonding the thermally adhesive fibers to the activated carbon.

In this way, activated carbon can be dispersed and fixed throughout the absorbent material, so during manufacturing and when used as sanitary napkins, activated carbon does not spill out, just like in conventional products where activated carbon is simply mixed into pulp. This makes handling easier.

In addition, if the absorbent body 1 is produced by similarly heat-molding a super absorbent resin mixed and dispersed in the pulp together with thermoadhesive fibers and activated carbon to form a mat, the super absorbent resin can be mixed into the absorbent body 1. Because it is dispersed and fixed throughout, the amount of absorption per unit weight increases throughout, making it possible to create a highly absorbent sanitary napkin.

Examples of super absorbent resins include starch-polyacrylate graft copolymers, crosslinked polyacrylates,
Vinyl alcohol-acrylate copolymers and the like can be suitably used.

The surface of the absorbent body thus obtained looks black through the coating material 4 due to the activated carbon, which makes the sanitary napkin look unhygienic.
A dry-processed nonwoven fabric mainly made of pulp is layered on a to eliminate dark spots on the surface.

Furthermore, in addition to the absorbent body and nonwoven fabric, cotton-like pulp or absorbent paper may be used on the lower surface of the absorbent body, on the upper surface of the nonwoven fabric, or between the absorbent body and the nonwoven fabric.

Further, the absorbent body 1 may be composed of only one heat-treated mat as shown in FIG. The absorbent body 1 having a thickness can be moved around.

Furthermore, in the present invention, a plurality of linear grooves 5 (usually 4 to 6) continuous in the longitudinal direction as shown in FIG. During pressure molding, menstrual blood absorbed into the absorbent body 1 spreads at a faster speed in the longitudinal direction, preventing leakage of menstrual blood from the width direction, and thus absorbing a large amount of water per volume and forming a linear shape. Due to the increased density of the grooves 5, a very advantageous sanitary napkin that does not easily lose its shape can be rolled.

Examples Pulverized pulp, synthetic pulp (swp-U manufactured by Mitsui Petrochemical Co., Ltd.)
I, -405), granular activated carbon and vinyl alcohol-sodium acrylate copolymer were dispersed and mixed in a weight ratio of 40: 15: 15: 30, respectively, and pressed with a roll, and the basis weight was 100 g/rft. A mat was obtained by blowing hot air onto the sheet at 140'C for 158P.

In this state, the activated carbon was firmly fixed within the mat.

Kino cloth with a basis weight of 50 g/d was arranged on the upper surface of the thus obtained mat to form an absorbent body, and four embossing grooves each having a width of 3 mm by roll press were formed on this absorbent body.

A laminate made of waterproof paper and polyethylene film was placed on the bottom as a waterproof material, and the whole was wrapped with nonwoven fabric to obtain a sanitary napkin.

The sanitary napkin thus obtained had excellent deodorizing properties, high absorbency, and excellent deformation resistance.

[Brief explanation of the drawing]

FIG. 1 is a schematic perspective view of the sanitary napkin of the present invention, and FIG. 2 is a sectional view taken along the line X--X in FIG. 1. Main symbols in the drawings, 1... Absorber, 2...
・Waterproof material, 4... Covering material, 5... Embossed groove.

Claims (1)

[Scope of utility model registration request] The pulp is blended with heat-adhesive fibers and powdered activated carbon,
Absorbent bodies made of heat-treated mats, dry-processed nonwoven fabrics mainly made of pulp layered on at least the menstrual blood-absorbing surface of the absorbent bodies, menstrual blood-absorbing side of absorbers and dry-processed nonwoven fabrics mainly made of pulp. A sanitary napkin consisting of cotton-like embossed grooves in the longitudinal direction.