JPH05159511A - Liner for floppy disc jacket - Google Patents

Abstract

PURPOSE:To obtain a liner for floppy disc jacket having excellent cleaning performance for catching duct, scratched off the disc surface, positively in the liner. CONSTITUTION:A non-woven linear comprises an outer layer part mainly arranged with non-thermoplastic fibers and an inner layer part containing thermoadhesive synthetic fibers wherein other synthetic fibers charged electrostatically are contained, together with the thermoadhesive fibers, in the inner layer part or the thermoadhesive synthetic fibers themselves are charged electrostatically.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to an improved liner for a floppy disk jacket.

[0002]

2. Description of the Related Art The exterior of a floppy disk is generally called a jacket and is made of vinyl chloride or ABS resin, and a non-woven liner is attached to the inside thereof. The liner wipes the floppy disc and blocks direct contact with the jacket to prevent damage to the floppy disc. Therefore, the performance required as a liner for a floppy disc jacket is the cleaning property and the protective property of the floppy disc, and various liners have been conventionally proposed for the purpose of improving them.

For example, Japanese Patent Application Laid-Open No. 58-7705 describes a liner made of a nonwoven fabric of polyester fiber, and Japanese Patent Application Laid-Open No. 54-49115 describes a liner made of a nonwoven fabric of polypropylene fiber. Actual Kaisho 5
No. 7-71280 describes a liner made of a non-woven fabric of recycled fibrous fibers, and these all use thermo-adhesive fibers to stabilize the shape of the liner. The method of thermally adhering is adopted.

[0004]

However, although the above-mentioned conventional liner scrapes off dust connected to the soft error from the disk surface once, it cannot be trapped inside the liner and returned to the disk surface again. Because
There was a problem in terms of cleanability.

The present invention solves the above-mentioned conventional problems and provides a liner for a floppy disk jacket having excellent cleaning properties, which enables dusts scraped from the disk surface to be firmly captured in the liner. The purpose is.

[0006]

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, in which a non-thermoplastic fiber is mainly arranged in an outer layer part and a heat-adhesive synthetic fiber is contained in an inner layer part. In a non-woven fabric, a floppy disk characterized in that the inner layer part contains other synthetic fibers that are electrostatically charged together with the thermoadhesive synthetic fibers, or the thermoadhesive synthetic fibers themselves are electrostatically charged. The gist is a liner for a jacket.

The present invention will be described in more detail. Since the outer layer portion of the liner according to the present invention is the portion that directly contacts the disc, only non-thermoplastic fibers, particularly rayon fibers having excellent flexibility are used. It is most preferable to be composed of, but other fibers may be contained to the extent that they do not adversely affect the disc.

The inner layer forming the basis of the present invention has heat-adhesive fibers for maintaining its shape as a liner and static electricity for firmly capturing dust scraped from the disk surface inside the liner. The presence of a synthetic fiber that is electrically charged to the inner surface is indispensable, but if the heat-adhesive fiber itself is charged with sufficient static electricity to firmly trap the dust inside the liner, another electrostatic charging composition Fiber is not particularly necessary.

The inner layer may contain other fibers in addition to the above heat-adhesive fibers and electrostatically charged fibers, but conductive fibers must be avoided.

As the electrostatically charged synthetic fibers, fibers having a large surface electric resistance such as polypropylene, polyethylene and polyester are preferably used.

As the heat-adhesive fiber, a heat-adhesive core-sheath type composite fiber having a low melting point component in the sheath and a high melting point component in the core is preferably used. But it doesn't matter.

The electrostatically charged synthetic fibers can be easily formed by subjecting a nonwoven fabric containing the above-mentioned synthetic fibers which are easily charged with static electricity to the inner layer portion, to a charging treatment such as corona discharge. And this electrostatically charged synthetic fiber is
The dust scraped from the disk surface is attracted to the inside of the liner by the coulomb force of the charged dust and the inductive force of the uncharged dust.

[0013]

EXAMPLES The present invention will be described in more detail with reference to the following examples.

(Example 1) Rayon fibers (1.5 denier x 51 mm) were used as the base fibers, and polypropylene fibers (1.5 denier) were used as the heat-adhesive fibers (also serving as electrostatically charged fibers). X 51 mm) was used to form a five-layer web having a basis weight of 27 g / m ^{2 with} a card machine in which five units were arranged in series. The structure of this five-layer web is such that the first and fifth layers are made of 100% rayon fiber, and the second, third and fourth layers are made of 70% rayon fiber and 30% polypropylene fiber. It was a web. The obtained five-layer web is embossed with an embossing roller having a surface temperature of 220 ° C., partially thermocompressed, and then applied with a voltage of −25 KV to 15 needle electrodes placed about 10 cm above. The charging process was performed using corona. Dust generated by ultrasonically vibrating the cut end of the obtained liner was collected, and the number was measured by an air particle counter. The results are shown in Table 1.

(Comparative Example 1) Rayon fiber (1.5 denier x 51 mm) was used as the base fiber, polyethylene terephthalate was used as the core and the melting point was 200 as the sheath as the thermally adhesive fiber.
Core-sheath type composite fiber (1.5 ° C low melting point polyester)
Car with 5 units arranged in series using denier × 51 mm)
A five-layer web having a basis weight of 35 g / m ² was formed using a dough machine. The structure of this five-layer web is that the first layer and the fifth layer are layers.
Rayon fiber 100%, the second and fourth layers are rayon fiber 70
% And a core-sheath type composite fiber 30% as a mixed web,
The layer was a mixed web of 50% rayon fiber and 50% core-sheath type composite fiber. The resulting 5-layer web was embossed in the same manner as in Example 1 to form a liner, and the number of dusts was measured. The results are shown in Table 1.

(Comparative Example 2)

In Example 1, the liner was formed under the same conditions except that the charging treatment was not performed, and the number of dusts was measured under the same conditions. The results are shown in Table 1.

[0018]

[Table 1]

[0019]

According to the present invention configured as described above,
Since there are electrostatically charged synthetic fibers in the inner layer, the liner
It prevents the dust that had previously adhered to the surface of the constituent fibers from falling off, and also firmly captures the dust scraped from the disk surface inside the liner to prevent the dust from falling off, thus exhibiting excellent cleaning performance. There are advantages.

Claims (1)

[Claims] 1. A non-woven fabric in which non-thermoplastic fibers are mainly arranged in the outer layer portion and heat-adhesive synthetic fibers are contained in the inner layer portion, and the inner layer portion is charged with static electricity together with the heat-adhesive synthetic fibers. A liner for a floppy disk jacket, characterized in that it contains synthetic fibers or the thermoadhesive synthetic fibers themselves are electrostatically charged.