JPH01321905A - Antistatic garment - Google Patents

Abstract

PURPOSE:To simplify the production of an antistatic working garment having excellent antistaticity and durability by laying a garment part composed of a fabric having conductive layer on an antistatic garment in such a manner as to contact the conductive layer with the conductive yarn of the antistatic garment. CONSTITUTION:A conductive coating produced e.g. by dispersing electrically conductive substance in a two-pack type polyether polyol-modified polyurethane resin, melamine derivative, etc., is applied to at least a surface of a fabric and solidified to form a garment part such as wristguard or apron having an electrically conductive layer. The objective antistatic garment is produced by contacting said conductive layer through a button, etc., to an electrically conductive yarn 1 arranged in the antistatic garment and having an electric resistance of preferably <=10<9>OMEGA/cm.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides antistatic properties suitable for use as work clothing for workers who work in environments where fires and explosions are likely to occur, and workers who handle electrical components. Regarding clothes.

[Prior art] Synthesis I! The fabric made of miscellaneous materials is natural! Compared to fabrics made of fibers, they generally have superior strength and durability, generate less fiber waste, and dry quickly after washing, making them suitable for work clothing and currently widely used. In particular, fabrics using filament yarns generate almost no fiber waste, so they are suitable for clothing in workplaces where a clean environment is required.

However, fabrics made of synthetic fibers have the disadvantage of being easily electrostatically charged, and because of this disadvantage, synthetic l! There is a problem in that clothing made of iH fabric is unsuitable as work clothing. on the other hand,
Fabrics made of natural m fibers have fewer drawbacks due to static electricity, but I! There was a problem in that clothing made of natural fibers could not be used as work clothes in workplaces where a clean environment was required, as litter was likely to be generated. In recent years, clothes suitable for the clean rooms required in semiconductor manufacturing factories are required to be free of static electricity and do not generate textile waste. It's not completed yet.

Methods of imparting antistatic properties to clothing made of synthetic Il fibers include blending synthetic fibers with hydrophilic polymers, etc.
Method using modified fibers with hydrophilic groups introduced, ■ Method of attaching water-absorbing substances such as hydrophilic polymers to synthetic navy blue or fabric through post-processing, ■ Conductive fibers such as conductive threads, metal strings, carbon fibers, etc. or yarns made of this yarn and yarns made of synthetic fibers or natural fibers, or twisted yarns,
Conductive fibers obtained by chemical treatments such as mixed spinning, composite spinning, coating methods, and electroless plating are mixed with conductive substances such as metals, conductive metal compounds, carbon black, and conductive metals. A method of weaving or knitting yarns made of conductive synthetic fibers attached side-by-side or around the entire circumference, or yarns made of yarns made of this yarn and yarns made of synthetic fibers or natural fibers, or yarns made of twisted yarns at appropriate intervals. ■Fabric Apply conductive layer paint to
There are methods of bonding conductive films together or providing a coating of metal or the like by vapor deposition or sputtering. Among these methods, the method (■) can provide some antistatic properties in a high humidity atmosphere of 50% R1+, but no antistatic effect can be obtained in a low humidity atmosphere of 30% R1+ or less.The method (■) ■
Similar to the method described above, there is also the problem that the antistatic effect cannot be obtained in a low-humidity atmosphere, and the antistatic property is likely to deteriorate due to repeated washing or the like. Method (2) has the disadvantage that conductive fibers and conductive fibers lack flexibility compared to synthetic fibers, etc., making them unsuitable as fibers for use in clothing, as well as being expensive. If the amount of fiber used is low, there is a problem that sufficient antistatic properties cannot be obtained. In method (2), durability becomes a problem because a coating layer of metal, etc. is provided, and the fabric does not have breathability, so the clothes cannot absorb stuffiness and human body dust when worn, creating new problems. .

[Object of the Invention] The object of the present invention is to improve such conventional drawbacks, and to improve antistatic properties,
Another object of the present invention is to propose antistatic clothing that has excellent durability and can be easily obtained.

[Structure of the Invention] The present invention provides an antistatic garment made of a fabric woven and knitted with conductive threads arranged at appropriate intervals. The antistatic garment is characterized in that the conductive thread and the conductive layer of the partial garment are stacked so as to have a contacting portion.

The conductive thread used in the present invention preferably has an electrical resistance per cm of 10 9 Ω/cm or less. Such conductive threads include those obtained by coating the surface of synthetic l11M with carbon or metal powder together with resin, those obtained by composite spinning containing polymers containing carbon and metal powder, and those obtained by composite spinning containing polymers containing carbon and metal powder, and those obtained by coating the inside of the fiber with metal by diffusion of metal ions. Those in which a complex is formed, those in which the inside of the fiber is impregnated with cupric iodide, etc. can be suitably used.

The electrical resistance value is a value measured by fixing both ends of wXH to aluminum foil using electrically conductive paste to serve as electrodes, with a sample length of 2 cm and an applied voltage of 1 oov.

In addition, the conductive thread is aligned with the threads constituting the fabric,
Although the conductive yarn is used by twisting or mixing, the conductive yarn may be used alone. Further, the conductive threads are arranged in a striped or lattice pattern at appropriate intervals in the fabric. FIGS. 1 and 2 are rear views showing examples of antistatic clothing (only the top is shown) used in the present invention, respectively.
The figure shows an example in which a fabric is used in which conductive threads are arranged in stripes, and FIG. 2 shows a fabric in which conductive threads are arranged in a lattice pattern. Antistatic clothing is usually used not only as an upper garment but also as a lower garment. In FIGS. 1 and 2, 1 indicates a conductive thread.

In the fabric used for the antistatic clothing, filaments of polyester or polyamide, which are synthetic fibers, are preferably used as threads other than the conductive yarn, and in particular antistatic polyester filaments made of fibers modified by the method (2). Yarn or antistatic polyamide yarn is preferably used. Antistatic clothing using such a fabric is produced by a known method.

Next, the fabric on which the conductive layer used in the present invention is formed will be explained. In order to form a conductive layer on at least one side of the fabric, the method (2) above is used, and among them, (a) a resin composition consisting of a two-component polyether polyol-modified polyurethane resin, a melamine derivative, an organic polyisocyanate, and a crosslinking catalyst. A preferred example is a method in which a conductive paint consisting of an electrically conductive substance dispersed therein is applied to a fabric and solidified. iii) A method of laminating a conductive film on a fabric, which is obtained by thinning a conductive paint made by adding a conductive substance to a one-component moisture-permeable polyurethane resin and subjecting it to crosslinking treatment. , can be obtained by a method using a material whose electrical resistance is much smaller than that of an array of conductive threads.

A fabric with such a conductive layer formed thereon is used to create partial clothing, and the partial clothing referred to here includes so-called armless clothing that covers the cuffs, zara, and apron-type partial clothing that covers the chest and abdomen. is exemplified. In the partial garment, the conductive layer is made to be placed on the outside of the garment, while the conductive layer of the partial garment is required to be in contact with the conductive yarn of the antistatic garment. . For this reason, the antistatic garment is constructed by overlapping a partial garment, but an example is one in which the antistatic garment and the partial garment are sewn separately and fastened with a known fastener. As the fastener, buttons, zippers, Velcro, strings, etc. can be used as appropriate. Further, in order to bring the conductive thread and the conductive layer into contact as described above, when the conductive layer is formed only on one side, it is preferable to fold back the end portion of the partial fabric.

[Example] An example of an antistatic garment is shown in which the antistatic garment (upper garment) shown in FIG. 1 is paired with a lower garment made of a fabric in which conductive threads are arranged in stripes.

The garment shown in Fig. 1 uses a fabric in which conductive yarns are arranged in stripes, and the fabric uses polyester processed yarn (75de/72fil) for the warp and weft.
Conductive carbon coated nylon seven filament yarn (22de) and polyester processed yarn (75d)
e/72f i l) (number of twists: 2001/m)
The fabric was sewn by a known method using a plain woven fabric made by arranging conductive threads of 8 mm in the warp at intervals of 8 mm.

The fabric on which the conductive layer used for the partial garment is formed is a one-component moisture-permeable polyurethane; a polyurethane solution containing 100 parts of Chrisbon 3314 [manufactured by Dainippon Ink & Chemicals Co., Ltd.] and 380 parts of conductive carbon paste; Eltic EC801. Using a comma coater on polypropylene coated paper, the solid content is 8! Coat it so that it becomes II/m1
The conductive layer film is formed by heating and drying at 00°C for 2 minutes. Separately, 20 parts of polyethylene glycol with an average molecular weight of 1500, 80 parts of polybutylene adipate diol with an average molecular weight of 2000, and 1 tolylene diisocyanate.
5 parts of trimethylolmelamine were reacted in 173 parts of a mixed solvent of 105 parts of toluene and 68 parts of dimethylformamide to obtain a two-part polyether polyol-modified polyurethane resin solution with a resin concentration of 40%.
87% of the liquid type polyether polyol-modified polyurethane resin) was added, and 15 parts of hexamethylene diisocyanate, 0.5 parts of pt-luenesulfonic acid, and 05 parts of dibutyltin dilaurate were added to form a two-component polyether. A polyol-modified polyurethane resin was obtained. This was applied as an adhesive onto the conductive film obtained previously so that the adhesive solid content was 18 g/'rIi, and dried for 30 seconds to obtain a conductive layer film with an adhesive layer. In addition, polyethylene terephthalate filament yarn (
After dyeing a plain fabric woven using 75de/72fi l) using a conventional method, this fabric and an adhesive layer of a conductive film with an adhesive layer were layered and pasted together by passing through a heated roll at a temperature of 120°C. After aging the product for 2 days, the polypropylene coated release paper was peeled off to obtain a fabric having a conductive layer.

Using this fabric, a partial garment (8) covering the cuffs shown in FIG. 3 and a partial garment (B) covering the chest and abdomen shown in FIG. 4 were created. (Figures 3 and 4 are perspective views illustrating the partial garment used in the present invention) The antistatic garment of the present invention is used in combination with the antistatic garment (upper and lower) obtained in this way and the partial garment. The electrostatic voltage was measured while wearing sex clothing. The electrostatic voltage was measured by a subject wearing the antistatic clothing of the present invention, wearing a conductive layer, at a temperature of 20°C and a humidity of 3.
The electrostatic voltage on the surface of the outer garment -10 when performing arm swing walking movements (10 times) in an environment of 0% RH was measured at the armpits and cuffs using a static electricity meter (Model 5V-8) manufactured by Nippon Statex. Measurements were taken at three locations: the buttocks and the flanks. The results are shown in Table 1.

Table 1 In Table 1, No. 41 to No. 083 show examples, and No. 14 shows comparative examples.

As shown in Nos. 1 to 003, the armpits, cuffs, and armpits showed low charging voltage and excellent antistatic effect, while the comparative example shown in No. 14 showed excellent antistatic effect. It was inferior to the example.

[Brief explanation of the drawing]

FIGS. 1 and 2 are rear views of antistatic clothing used in the present invention, and FIGS. 3 and 4 are perspective views showing examples of partial clothing used in the present invention.

Claims (1)

[Claims] In an antistatic garment made of a fabric woven and knitted with conductive threads arranged at appropriate intervals, a partial garment made of a fabric with a conductive layer formed on at least one side is combined with the conductive yarn of the antistatic garment and the conductive layer of the partial garment. 1. An antistatic garment characterized by being constructed by overlapping the two parts so as to have a contacting part.