JPS6340983Y2 - - Google Patents

Description

[Detailed explanation of the idea]

The present invention relates to a sanitary napkin, and more particularly to a sanitary napkin having an anti-slip material (slip-preventing tape) installed on the non-use surface to prevent slipping or twisting during use. Conventionally, sanitary napkins are made of an absorbent material made of pulp, absorbent paper, etc., a leak-proof sheet, generally called polylaminated waterproof paper, which is laminated with waterproof paper or polyethylene film for the purpose of preventing leaks, and the surface and outside are coated. Consists of surface material. The performance required for sanitary napkins is high absorption rate and absorption retention, and in order to achieve these objectives, in recent years, research has been conducted into surface materials and attempts have been made to apply superabsorbent polymers as absorbents. ing. The inventors of the present invention have also advanced the above idea and have already proposed absorbent materials (see JP-A-53-55260) and absorbent articles (see JP-A-54-107191). In this way, no matter how much the performance of the absorbent material improves, if the fit at the crotch during use or movement causes it to shift from its normal position, its performance will be completely meaningless. . Anti-slip tapes have been proposed to prevent such movement. Anti-slip tape for sanitary napkins was first introduced over 10 years ago and continues to this day. In the meantime, the material used is double-sided adhesive tape or hot melt type, and the shape is about 10 to 15 mm in length for adhesive tape and 40 to 50 mm in width, or 160 to 190 mm in length for hot melt. Width 3-5
The main products that have been provided are those that are pasted or coated on mm and the top surface is covered with release paper. However, with these conventional anti-slip tapes, it is difficult to determine the proper position during use and installation, which results in a loss of fit and a sense of discomfort. Also, basically the front of the groin and the buttocks move differently when walking or exercising, which can cause misalignment or the sanitary napkin itself to move, which is not sufficiently effective and often causes leakage when absorbing menstrual blood. . Needless to say, this not only fundamentally impairs the performance of the absorber, but also causes mental anxiety to the user. Therefore, the inventors of the present invention conducted extensive research in order to solve the problems of these conventional sanitary napkin slip prevention tapes, and as a result, they came up with the present invention. The purpose of the present invention is to provide a sanitary napkin that has an anti-slip material (slip-preventing tape) that makes it easy to determine the position to wear it during use, and that exhibits effective slip-preventing force against various movements of the crotch during use. It's about doing. The sanitary napkin of the present invention has a region on which an adhesive is provided and a region where fibers are raised, juxtaposed on one surface. Hereinafter, the present invention will be explained in more detail with reference to the drawings. FIG. 1 shows the shape of the anti-slip tape installed on the unused side of a conventional sanitary napkin. The one shown in FIG. 1a is a very common one, in which a double-sided adhesive tape 2 is provided at one location in the front of the sanitary napkin 1 in the lateral direction. Most of the tapes currently available on the market are called horizontal one-place tapes. This type has relatively few problems compared to others in terms of ease of installation, but it is said that its original purpose of preventing slipping, especially preventing lateral slipping on the buttock side (the side without slip-preventing tape), is weak. It has its drawbacks. On the other hand, Fig. 1b shows the case where hot melt is mainly used, and the hot melt adhesive 3 is the sanitary napkin 1.
It is long in the vertical direction and is called a vertical tape. Although this type is thought to have improved ability to prevent lateral slippage compared to the above-mentioned types, this effect is not achieved in practical terms, and on the contrary, it often causes slippage or gives a strange feeling. A possible cause of this is that when worn, the center portion of the anti-slip tape is bent at the crotch, forming a particular shape in the lateral direction and setting it. As a result, the effective adhesion area with the shorts is extremely reduced, exposing the drawbacks mentioned above. Further, FIG. 1c is also considered to be a shape proposed primarily for the purpose of improving the ability to prevent lateral slippage, and the double-sided adhesive tape 2 is provided in two places, at the front and back of the sanitary napkin 1, in the lateral direction. This horizontal double tape type basically has the same drawbacks as the vertical tape type. In other words, when it is installed, it is glued to the shorts and the vertical shape is determined at the same time, so there will be a difference in shape between it and the normal usage state. Therefore, it is difficult to install the device in consideration of this point, and even if efforts are made to do so, it will be extremely difficult. In addition, as a slip-prevention material, a material having a part 4 made of raised fibers of nylon, rayon, etc., as shown in Fig. 2, has been devised (Utility Model No. 50-44097,
Utility Model Application No. 50-44098, Utility Model Application No. 50-44099).
However, these devices have the disadvantage that they are difficult to set in the specified position when worn, and are set in a misaligned state, resulting in lateral leakage when walking or exercising. As mentioned above, conventional anti-slip materials are easy to install and effective in preventing slips (especially against lateral slips).
It is difficult to find something that satisfies both. The sanitary napkin of the present invention has improved the conventional drawbacks, and as shown in Figs. In particular, as shown in Figures 4 and 5, adhesive is provided in the front 1/3 of the area (above the X-X' line), and the remaining 2/3 is An excellent anti-slip effect can be achieved by providing a portion where the fibers are raised (below the line X-X'). The action for determining the position of the sanitary napkin according to the present invention is achieved by an adhesive such as double-sided adhesive tape 2 or hot melt adhesive 3 placed within about 1/3 of the front of the groin. In addition, in order to prevent lateral slippage during walking and other movements during practical use, the fibers installed on the groin and buttocks side are raised in the area 4.
The fine fibers closely engage with the inner surface of the underwear, providing an effective prevention effect. In addition, since the raised fibers themselves are not sticky, they can be worn along the body surface in the most comfortable shape. It is clear that this is also effective for absorption properties, especially against leakage. There are no particular limitations on the method for manufacturing the raised fiber part used in the present invention and the method for installing it on the sanitary napkin, and known methods can be used. Types of napped fibers used in the present invention include nylon, rayon, and the like. Further, the length of the fibers is preferably about 0.5 to 3 mm. or,
The thickness of the fibers is preferably about 50 microns or less. Next, the present invention will be explained in more detail with reference to Examples and Comparative Examples. Examples 1 to 12 Various sanitary napkins having the shapes shown in FIGS. 3 to 5 were manufactured and their performance was measured by the method shown below. The results are shown in Table 1. Measurement method - Lateral slippage value: Measured using a tensile tester - Fit when worn: The sample is worn 10 times, and the number of times without discomfort is displayed - Lateral leakage: A microtube is set in the groin area of the test subject. Pour the test liquid using a microtube pump and check for horizontal leakage. At that time, the subject performs walking movements. The test was carried out 10 times, and the number of leaks was indicated. Comparative Examples 1 to 6 Various sanitary napkins having the shapes shown in Figs. 1 and 2 were manufactured, and their performance was measured in the same manner as in the examples. The results are shown in Table 1.

[Table] From the above results, the measured value of lateral deviation and the fit when worn are important, and by juxtaposing the adhesive and the area where the fibers are raised as in the present invention, it is possible to By providing an adhesive inside and placing the remaining two-thirds of the area in which the fibers were raised, an excellent slip-preventing effect was demonstrated.

[Brief explanation of drawings]

FIGS. 1 and 2 are plan views showing an example of installing a conventional sanitary napkin anti-slip material, and FIGS. 3 to 5 are plan views showing an example of the sanitary napkin of the present invention. 1... Sanitary napkin, 2... Double-sided adhesive tape, 3... Hot melt adhesive, 4... Napped fiber.

Claims (1)

[Claims for Utility Model Registration] 1. On one surface of a substantially vertically long sanitary napkin, a region where an adhesive is provided and a region where fibers are raised are juxtaposed, and 1/3 from the front in the vertical direction
A sanitary napkin in which an adhesive is provided in the area, and a part with raised fibers is placed in the remaining two-thirds of the area. 2. The sanitary napkin according to claim 1, wherein the length of the raised fibers is 0.5 mm to 3 mm.