JPS62223305A - Dustproof clothing - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to dustproof clothing that can be used in clean rooms and the like.

(Conventional technology) In the electronics and bio-industries, secretions from the human body, fine dust from underwear, bacteria, etc. are released from the openings of dust-proof clothing, contaminating the surrounding area, and preventing contamination from surrounding areas. Dust-proof clothing to protect the human body is also required.

For this reason, there is a method of attaching an electret sheet near the opening to allow the contaminants to adhere, but this method has the disadvantage that the surface charge density is attenuated by ionic substances in the air or how much dust is deposited, causing the effect to disappear quickly. there were. Also when washing (
Dry cleaning) also had the disadvantage of attenuating the charge.

(Problems to be Solved by the Invention) The object of the present invention is to eliminate the above-mentioned drawbacks and to provide a dustproof garment with -g good pollution prevention.

(Measures to solve problems) In order to achieve the above object, the present invention has the following configuration.

This dust-proof clothing is made by attaching the Electref 1 to sheet to at least the part constituting the opening of the dust-proof clothing, and covering the Electref 1 to sheet with another sheet.

The actual IM aspect of the present invention will be explained in detail below based on the drawings.

FIG. 1 is an example of an embodiment of the present invention.

The dust-proof garment 1 is composed of 14 pieces including a hood 2, an upper garment 3, and a lower garment 4.

Of these, in order to expose the hood 2, an electret sheet 5 is attached to the back surface of the back base fabric 6 along the periphery of the opening 2a as shown in the cross-sectional view of FIG.

J: Sea urchin sheet 7 covering the electret seams 1 to 5 is used as a backing fabric. Note that charges are induced on the surface of the other sheet 7. Therefore, when particles such as dust or bacteria pass nearby, the electric force forces them onto the surface.

The electret sheet is detachably attached by a chuck 8.

Also, regarding the jacket 3, the neck opening 3a, cuffs 3b, 3
It is also attached to b' in the same way.

Further, when the neck opening 3a of the jacket 3 is enlarged, it is as shown in Fig. 2.

The back base fabric 6 and the back base fabric 5 of the other sheet 7 form a base 1,
An electret sheet is inserted inside it as shown in FIG.

The internal electret sheet is attached and detached through the chuck 8.

Furthermore, electret sheets are attached to the hem openings 4a and 4a' of the lower garment 4 as shown in FIG.

In order to induce charges on the surface of the electret sheet and provide it with electric force, the electret sheet should have a resistance of 1 x 10-10 c/- or more, preferably 3 x 10-10 c/- or more.

In addition, the charge density on the surface of the other coated sheet is 3X10"
It is preferable that it is C/cd or more.

Since the electret sheet constantly exerts electric force inside and is covered with other sheets, there is less attenuation due to contamination and the effect can be provided for a long period of time.

Other sheet types that can be used include woven fabrics, nonwoven fabrics, knitted fabrics, paper 1, and films.

However, in order to eliminate the surface charge density, it is necessary to select and use an appropriate structure, basis weight, and thickness.

The yarn used in the woven or knitted fabric is preferably filament yarn rather than spun yarn. The materials used may be synthetic materials, natural materials, or inorganic materials.

Further, it can be used even if it contains a conductive material such as conductive fiber.

As the electret sheet, sheet-like materials such as knitted fabrics, nonwoven fabrics, paper, and films can be used.

The material is polyolefin, (polypropylene,
Synthesized materials such as polyethylene, polystyrene), polyester, fluorine resins, vinyl chloride resins, acrylonitrile, and polycarbonate, as well as inorganic materials, can be used as long as they have a volume resistivity of 1012 Ωcm or more.

The electret sheet can be attached to dust-proof clothing in areas other than the opening.

The attachment and detachment of the electret sheet takes into account the attachment and detachment of the electret sheet after washing or long-term use, and in addition to the exchange using a zipper, a method using a driver 1 to a button may be used.

Various backing fabrics can be used for dust-proof clothing, including conductive edge fabrics, coated fabrics, and non-antistatic general fabrics. It is also possible to select a base fabric that induces less charge on the surface.

For example, thick fabrics, fabrics made of spun yarn, etc.

The dust-proof clothing of the present invention captures pollutants by using the electric power of the electrets 1~, and is a dust-proof clothing that has little charge decay over a long period of time, and the electret sheet can be attached and removed during washing. be. For this reason, it is ideal as work clothing in a clean room.

The measurement method will be explained below.

Volume resistivity was measured according to J15-C-2318.

The surface charge density was measured by the method shown in FIG.

Metal plate 1 on which the fibrous sheet sample 19 to be measured is grounded
0, and another metal electrode (3 cm diameter) 11 is approached and brought into contact with the sample from above, and the electric charge existing on the surface of the sample 1 is generated on the total bending electrode 11 by the principle of electrostatic induction, and this electric charge is removed. The electric potential is accumulated in the capacitor 12, and the electric potential is measured by the electric potential meter 13, and the surface charge density is determined by the following formula.

surface charge density C/cnf=CXV/S C: Capacitor capacity (7 rad) V: Potential (volt) S: Electrode area (cnf) (Example) Example 1 A prototype dustproof garment without a hood was made as shown in Figure 1.

Table W, A5, polyethylene terephthalate yarn 100
D (multifilament) with a warp thread density of 112 pieces/in
An electrically conductive fabric was used, which had a plain weave with a weft yarn density of 88 wood/in, and had carbon-containing conductive yarns inserted between the warp yarns at intervals of 6r++m and a lattice-like membrane at intervals of 7 mm between the warp yarns.

For the other sheet, that is, the lining material, a woven fabric in which the conductive yarn of the backing fabric was not inserted was prepared.

An electret sheet made of polypropylene fabric was used.

The surface charge density of this sheet is 1,2 x 10-9C/
It was c4. The design of this fabric is a satin fabric using polypropylene and multifilament (500D> for the warp and weft yarns, with a warp yarn density of 80 yarns/in and a weft yarn density of 57 yarns/in).

This electret fabric was attached around the opening with a width of 3.5 cm.

Wear this dust-proof clothing while walking in a class 1 clean room, and then immediately measure the dust generated from the collar with a measuring tube near the collar and use a dust counter (manufactured by Hitachi) to collect dust of 0.17 μm or more. The number of particles was measured.

If electret fabric is not attached, 630 pieces/
f13, but when electret fabric was attached, the generated dust could be suppressed to 200 pieces/ft3.

In addition, the surface charge density of the front part of the dustproof clothing (other sheet side) was measured to be 1.2 x 10-10C/-.

Example 2 Using the dustproof clothing used in Example-1, a polypropylene film (220 μm
) was used.

Similarly, the number of particles generated by the collar was measured in a clean room.

If there is no electret film, 630 pieces/ff3
However, when the electret film was used, the number of generated particles could be suppressed to 152 particles/fr3.

In this case, the surface charge density of the Elek 1-Let film was 7.2×10 −9 C/−.

(Effects of the Invention) The dustproof clothing of the present invention protects against fine dust generated from the human body, under blows, etc.
It can suppress bacteria and can be worn in clean rooms.

[Brief explanation of drawings]

FIG. 1 is a front view of an example of dustproof clothing according to the present invention;
Fig. 2 is a perspective view of the collar opening of the dustproof clothing according to the present invention, Fig. 3 is a sectional view of the opening of the dustproof clothing according to the present invention, and Fig. 4 is a surface charge density measuring device. It is an explanatory diagram of a hailstorm. 1: Dust-proof garment 2: Hood 3: Upper garment 4: Lower garment 2a: Hood opening 3a: Upper garment opening 3b: Upper garment cuff 3C: Upper garment chuck section 4a: Pants hem opening 5: Erec 1 Het sheet 6: Back base fabric 7: Other sheet (back base A 5) 8: Chuck 9: I male sheet (measurement sample) 10: Earth electrode 11: Metal electrode 12: Capacitor 13: Electrometer patent applicant Toshi Co., Ltd. Figure 1 Figure 2 Figure 3 Figure 4

Claims (4)

[Claims] (1) A dust-proof garment comprising an electret sheet attached to at least a portion of the dust-proof garment constituting the opening, and the electret sheet covered with another sheet. (2) The surface charge density of the electret sheet is 1X10
^-^1^0C/cm^2 or more, the dust-proof clothing according to claim (1). (3) After covering the electret sheet with another sheet, the backside charge density on the coated surface is 3X10^-^1^1C/
The dustproof clothing according to claim (1), which has a diameter of cm^2 or more. (4) The dustproof clothing according to claim (1), wherein the electret sheet is removable.