JPH05181Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention relates to improvement of sanitary napkins.

[Prior Art] Conventional sanitary napkins have been pasted with double-sided tape, hot melt, or urethane foam on the non-use side of the napkin to prevent them from slipping or twisting during use.

[Problem that the invention aims to solve] In the conventional sanitary napkins with double-sided tape attached as described above, in order to cut the double-sided tape (width 40 mm) into 10 mm pieces and attach it continuously to the non-use side of the napkin, This method requires complicated equipment, leading to problems such as high machine costs including maintenance costs, reduced manufacturing speed, and high cost of the double-sided tape itself. Therefore, recently, hot-melt type sanitary napkins are replacing double-sided tape-attached sanitary napkins.

Hot melt is made by melting a butadiene copolymer resin, placing the resin on an engraved roll, transferring it to the non-use side of a napkin, and forming a release paper on this. In this case, since the molten resin at a temperature close to 170 degrees to 180 degrees is transferred to the non-use side of the napkin, the resin is also fixed to the waterproof layer of the napkin. Therefore, with hot-melt type sanitary napkins, they are fixed to the shorts to prevent leakage due to movement, but as mentioned above, the waterproof layer is damaged because it is also attached to the waterproof layer, and vice versa. There was a problem that leakage was encouraged.

Furthermore, sanitary napkins with foam urethane applied have physical friction to suppress movement, but this alone is not sufficient, so urethane foam is applied by transferring hot melt resin to the entire non-use surface of the napkin and making holes on it. are pasted together and molded. In this state, the friction of the urethane will prevent movement, and the resin in the hole will also be adhesively fixed. Therefore, as mentioned above, there was a problem in that sufficient effects could not be obtained using urethane foam alone.

This invention was made to solve these problems, and to provide a sanitary napkin that can prevent slippage and twisting during use without using double-sided tape, hot melt, foamed urethane, etc., and also has a waterproof effect. With the goal.

[Means for Solving the Problems] In order to achieve the above object, the sanitary napkin according to this invention has a sheet-like aggregate made of ultra-fine fibers of polypropylene and/or polyester on the non-use side of the napkin. It is placed on the side.

[Function] In this invention, if the sheet-like aggregate is placed on the non-use surface of the napkin, each ultra-fine fiber will become intertwined with the fabric fibers of the shorts during use, resulting in a high degree of friction. Adhesive effect can be obtained.

[Example] An example of this invention will be described with reference to FIGS. 1 and 2. FIG. 1 is a partially cutaway front view, and FIG. 2 is a longitudinal side view. In the figure, 1 is an absorption layer, 2
3 is an outer covering (nonwoven fabric), and 3 is a nonwoven fabric placed on the non-use side of the napkin, which is a sheet-like aggregate made of ultrafine fibers of polypropylene and/or polyester. Reference numeral 4 denotes a heat-melting adhesive portion that joins the outer cover 2 and the nonwoven fabric 3.

Normally, nonwoven fabrics are manufactured using fibers with a thickness of 1.5 to 5 denier, whereas the fiber thickness of nonwoven fabric 3, which is an aggregate of ultra-fine fibers, is 0.04 to 0.1 denier. It is extremely thin.

When the non-woven fabric 3, which is made up of an accumulation of each of these ultra-fine fibers, is placed on the non-use side of the napkin and in direct contact with the shorts, each of the ultra-fine fibers will interact with the fabric fibers of the shorts. This creates a mutual entanglement between the napkins and prevents the sanitary napkin from moving, which is its original purpose.

The nonwoven fabric 3 is made by melting a polypropylene and/or polyester resin and, when discharging this resin, contacting the molten resin with high-pressure steam heated to a high temperature at the discharge part, and then spraying and laminating it onto a wire mesh provided at the bottom. Moreover, since it is an aggregate of many fibers, the inter-fiber density is high and it is breathable, but since these fibers are hydrophobic, they also achieve a waterproof effect due to the phenomenon of mutual surface tension. I will do it. Furthermore, since the waterproof layer is made by laminating a thin layer of polyethylene onto waterproof paper, it has no air permeability at all, and this has caused the problem of rashes due to stuffiness during use. However, this aggregate 3 of ultra-fine fibers can achieve breathability while achieving a waterproof effect.

[Effects of the invention] As described above, according to this invention, it is possible to prevent shifting and twisting during use, and also to have a waterproof effect, and also to obtain the following effects.

Double-sided tape to prevent shifting and twisting during use.
No need for hot melt, urethane foam, etc.

The waterproof layer of polyethylene laminate paper is no longer required.

In connection with the above, since a tape application device or a resin melting device (melt coater) is not required, equipment costs can be reduced.

Since the waterproof layer is breathable, rashes due to stuffiness are reduced.

There is no need to worry about adhesive resin remaining on the shot.

Machine speed can be increased and production costs can be reduced.

Eliminates the need to remove the tape (release paper) during use.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway front view showing an embodiment of this invention, and FIG. 2 is a longitudinal side view. In the figure, 1 is an absorbent layer, 2 is an outer cover, and 3 is a sheet-like aggregate. Note that the same reference numerals in each figure indicate the same or corresponding parts.

Claims (1)

[Scope of utility model registration request] A sanitary napkin characterized in that a sheet-like aggregate made of ultrafine fibers of polypropylene and/or polyester is arranged on the non-use side of the napkin.