JPH01221547A - Woven fabric for dust-free garment - Google Patents

Abstract

PURPOSE:To obtain the subject dust-free garment resistant to abrasion, by disposing an electrically conductive yarn having an electric resistance smaller than a specific level in a woven fabric of synthetic fiber multifilaments free from electrical conductivity in a specific state. CONSTITUTION:The objective dust-free garment is produced by weaving electrically conductive yarns 2 having electric resistance of <=10<8>/cm and synthetic fiber multifilament yarns 1, 1', 3 free from electrical conductivity. A part of the electrically conductive yarns 2 are disposed on the surface of the woven fabric and is always positioned at the inner side of the fabric relative to the plane P connecting the tip ends of the protrusions of the surface unevenness formed of the synthetic fiber multifilament yarns 1, 1', 3 and below the surface of the plane P.

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a dust-free clothing fabric.

(Prior art) In recent years, problems caused by dust and static electricity have become a problem in industrial fields such as electronic equipment, precision instruments, and film manufacturing, and in these industrial fields, antistatic dust-free clothing is worn in clean rooms. And work is being done. In order to prevent dust from being generated from clothes, woven fabrics made of strong synthetic multifilament fibers without fiber ends are often used as fabrics for dust-free clothing. In addition, in order to prevent static electricity damage caused by dust-free clothing, conductive threads are woven into the fabric to prevent the generation of static electricity, and to quickly attenuate the generated static electricity by leaking it through the conductive threads. is often used.

Conductive threads are those coated with conductive metal, carbon, etc. on the fiber surface, or those formed inside the fibers (generally called sheath core fibers), or those dispersed within the fibers. is called a blend, and is sometimes referred to as an antistatic yarn, but in the present invention, it is often used as a conductive yarn). In such conventional technology, dust-free clothing that satisfies dustproof performance and antistatic performance is provided in the early stage when the number of times the clothes are washed (the number of times they are washed) is small.

However, the biggest drawback of conventional dust-free clothing is that as the number of washings (number of times it is worn) increases, its dust-proofing performance and power-training performance deteriorate, and it loses its function as a dust-free clothing.

The cause of this performance decline is the conductive fine particles used to manufacture the conductive yarn. That is, the durability of the coating of the conductive fine particles is low, and it is easily damaged by wear due to friction caused by washing or the like. When broken, the broken pieces scatter and become a source of dust.

Particularly when conductive dust adheres to electronic components, the damage is extremely serious. When the conductive thread is damaged in this way, its conductivity disappears and it not only ceases to function, but also causes serious problems.

(Objective of the present invention) The object of the present invention is to eliminate these conventional drawbacks and to propose a wear-resistant, durable, antistatic, dust-free garment.

(Structure of the present invention) The present invention is a woven fabric using a conductive yarn having an electrical resistance of 108Ω/Cm or less and a synthetic fiber multifilament yarn having no conductivity, wherein the conductive yarn is a woven fabric. The conductive thread is necessarily present on the outside of the surface formed by the synthetic fiber multifilament yarn on the surface connecting the convex ends of the convex portions of the surface irregularities that are arranged on the surface and formed by the intersection of the warp and the weft. A dust-free clothing fabric characterized by being arranged so as not to cause dust.

The present invention will be explained with reference to the drawings.

FIG. 1 is a plan view schematically showing the surface of an example of the dust-free clothing fabric of the present invention. In Figure 1, 1.1',
3 is a synthetic fiber multifilament, 1.1° is the warp yarn of the fabric, and 3 is the weft yarn. 2 is a conductive yarn, and in the example shown in FIG. 1, 1° is a synthetic fiber multifilament yarn woven parallel to and in the same structure as the conductive yarn 2.

In the present invention, as shown in FIG.
It is important that a portion of the fabric be exposed on the surface of the fabric. Exposure here refers to a state in which the front and back surfaces of the fabric are visually visible (including when viewed under magnification with a microscope, etc.).

Figure 2 is a cross-sectional view of the fabric in Figure 1 taken along line A-A';
FIG. 3 is a cross-sectional view of the fabric shown in FIG. 1 taken along line BB'.

In the present invention, as shown in FIG. 2 and FIG. , it is important that it is always on the inside side of the fabric and at a position lower than the convex end surface.

Preferred examples of the synthetic fiber multifilament yarn of the present invention include polyester, nylon, etc., which have high strength and excellent durability. Note that the synthetic fiber multifilament may be a processed yarn as long as it is a long fiber. It is necessary that the electrical resistance of the conductive yarn of the present invention is 10 8 Ω/cm or less.

Preferred examples of such conductive threads having an electrical resistance of 10 8 /cm or less include those whose fiber surfaces are coated with conductive metal, carbon, or the like.

The denier of the conductive yarn used in the present invention is preferably 40% or less of the denier of the synthetic fiber multifilament, and more preferably 30% or less. In general, it is preferable that the conductive yarn has a higher clean water shrinkage rate than the synthetic fiber multifilament yarn. This is because the fabric shrinks due to heat during the dyeing process after weaving, but if the fresh water shrinkage rate of the conductive yarn is higher than that of the synthetic fiber multifilament yarn, then the conductive yarn can be used as a synthetic fiber multifilament yarn. The configuration of the present invention in which the yarn is disposed at a position lower in the interior of the fabric than the yarn can be easily achieved.

Next, other methods of making a woven structure such as that of the present invention will be described.

Preferred examples of the textile structure include plain weave and twill weave. As for the method of weaving the conductive yarn, as shown in FIG. 1, it is preferable to weave the conductive yarn 1° parallel to and in the same structure as the synthetic fiber multifilament yarn, a method generally called pulling.

It is also possible to use a method of using the conductive yarn 2 alone, which is generally referred to as a single yarn method, but it is also possible to use a method of using the conductive yarn 2 alone, but it is also possible to use a method in which a synthetic fiber multifilament yarn is wound around the conductive yarn. , it can be used as a wall twist in which a part of the conductive yarn is exposed.

In addition, the electrical resistance referred to in the present invention is 90% between 2cm of conductive thread.
The electric current was measured when a voltage of V was applied, and the electrical resistance was calculated from the following formula.

■ R = - ■ R: Electrical resistance V; Voltage I; Current water shrinkage rate is JIS-L-1013, 7, 15 eight methods (JIS L-1013, 7, 15 eight method if synthetic fiber multifilament is processed yarn)
1090, 5. This refers to the value tested using boiling water using the IOA method.

(Actions of the Invention) Since the dust-free clothing fabric according to the present invention has a special structure as explained above, it has the following effects.

have an effect.

(1) Since a part of the conductive threads of the fabric of the present invention are exposed on the surface of the fabric, when a conductive body (such as a human body) comes into contact with the fabric with a pressure above a certain level, the conductive threads The strips easily contact conductors and conduct electricity, leaking and attenuating the static electricity charged in the synthetic fiber multifilament yarn. If the conductive thread is not exposed, it cannot contact the conductor, and since there is a non-conductive synthetic fiber multifilament thread between the conductor and the conductive thread, no electricity will be applied, and the synthetic fiber multifilament thread will be charged. The static electricity generated is difficult to leak.

In this way, the conductive threads are arranged on the surface of the fabric and exposed, which is effective in improving antistatic properties.

(2) Since the conductive yarn used in the fabric of the present invention is always located at a lower position than the convex end surface of the synthetic fiber multifilament yarn, when the fabric is washed, the conductive yarn is protected from the frictional effect during washing. guard against wear and tear.

In other words, the present invention provides (1) a higher level of training ability, and (2)
) has the effect of obtaining high washing durability.

(Example) The present invention will be specifically explained below using Examples.

As a synthetic fiber multifilament yarn, "I"
JM polyester multifilament yarn 100 denier 48 filaments and polyester multifilament yarn 40 denier 24 filaments were used. The desired clean water shrinkage rate of the polyester filament yarn was 19 by changing the stretching ratio and setting temperature. As the conductive yarn, "Metarian" 20 denier 1 filament made by Teijin ((3)) was used.The woven fabric is plain weave coarse weave, and the warp thread density is 50 threads/C.
m, the weft yarn density is 35 threads/cm, and the conductive yarns are woven by pulling, single yarn, and intertwisting (Z twist 200 T).
/m), using wall twisted yarn (conductive yarn covered with 100 denier 48 filament polyester filament yarn and used as wall twist), each conductive yarn was woven as a warp yarn at 1 cm intervals. .

The fabric thus obtained was dyed at 130'C for 30 minutes and then heat-cut to a size im x lm (to prevent fraying). Table 1 shows the results of performance tests for each fabric.

The exposure of the conductive yarn and the height of the conductive yarn were determined by microscopic observation, and the height is the height from the inside of the fabric to the outside.

As shown in Figure 1, the breakage rate of conductive yarn is calculated as the breakage in 100 units, where the conductive yarn crosses from one weft to the next weft to the next weft. The breakage rate (%) was determined by microscopic evaluation.

Frictional charging voltage was tested according to JIS L-1094B method (20°C, 40% R11). Naori. has not been washed.

1-100 is obtained by washing according to JIS L 0217-103 method repeatedly ioo times.

As is clear from the test results in Table 1, Example A, which has the structure of the present invention, does not cause damage to the conductive threads when washed, does not change the frictional charging voltage, is high-interest type, and has high durability. I understand.

In Comparative Example B, the denier ratio of the conductive yarn is high, so the conductive yarn is located at a higher position than the polyester filament, and a part of the conductive yarn is damaged by washing, resulting in poor charging voltage. Become.

In Comparative Example C, the fresh water shrinkage rate of the conductive yarn is higher than the fresh water shrinkage rate of the polyester filament, so the conductive yarn is positioned higher than the polyester filament, and is damaged by washing, resulting in poor friction charging voltage.

As a comparative example, in E, the conductive threads were improperly woven in, so the conductive threads were placed higher than the polyester filaments, and were damaged by washing, resulting in poor frictional charging voltage.

In Comparative Example F, since the conductive yarn is covered, there are few exposed parts, and the frictional charging voltage is poor even in the initial stage without washing.

[Brief explanation of the drawing]

FIG. 1 is a plan view schematically illustrating the surface of an example of the dust-free clothing fabric of the present invention, and FIG. 2 is a plan view of the fabric shown in FIG.
Figure 3 is a cross-sectional view taken along the line B--
FIG. 3 is a cross-sectional view taken along line B'. 1.1°, 3...Synthetic fiber multifilament yarn 2.
...Conductive thread P...Connects the convex ends of the convex parts

Claims (1)

[Claims] 1. A conductive thread with an electrical resistance of 10^8 Ω/cm or less,
A woven fabric using a non-conductive synthetic fiber multifilament yarn, the conductive yarn is arranged on the surface of the woven fabric, and the convex end of the convex part of the surface unevenness formed by the intersection of the warp and weft. A woven fabric for dust-free clothing, characterized in that the conductive yarn is arranged so that it does not exist on the outside of the surface formed by the synthetic fiber multifilament yarn on the tying surface.