JP7685866B2 - Antistatic fabrics and antistatic clothing - Google Patents

Description

The present invention relates to antistatic fabrics and antistatic clothing suitable for work clothes, uniforms, etc.

Conductive clothing has been used to prevent static electricity dust collection in clean rooms and in workplaces where parts and chemicals that are a hindrance due to static electricity are handled. Conductive clothing has conductive threads woven into the fabric as a countermeasure against static electricity. For example, conductive threads are woven into stripes or lattices at regular intervals, and static electricity is neutralized by corona discharge to prevent static electricity dust collection. In recent years, the surface resistance value of conductive clothing has been stipulated in IEC (International Electrotechnical Commission) 61340-5-1 and 5-2 as a required characteristic for static electricity management, and surface conductivity is required throughout the entire garment. Patent Document 1 proposes a woven fabric using a yarn in which polyester filament yarn is double-covered with conductive thread and a yarn in which polyester filament yarn is single-covered with conductive thread. Patent Document 2 proposes a woven fabric for uniforms using a double-covered yarn in which polyethylene terephthalate yarn is arranged in the core and polybutylene terephthalate conductive yarn is arranged in the sheath.

Japanese Patent Application Publication No. 11-350296 JP 2010-285707 A

However, conventional antistatic fabrics had problems with sweat absorption, quick-drying, comfort, and wrinkle resistance, and improvements were needed.

To solve the above problems, the present invention provides an antistatic fabric and antistatic clothing that have a good balance of sweat absorption, quick-drying properties, comfort, and wrinkle resistance.

The antistatic fabric of the present invention includes conductive yarns and non-conductive yarns, and the conductive yarns are arranged at intervals between warp yarns and weft yarns,
The conductive yarn arranged in the warp is a core-sheath composite conductive yarn, the core being a yarn containing polyester fiber and cotton fiber, and the sheath being a conductive yarn;
The non-conductive warp yarns include a blend of polyester and cotton fibers;
The conductive yarn arranged in the weft is a core-sheath composite conductive yarn, the core being a polyester stretch fiber yarn and the sheath being a conductive yarn,
The non-conductive weft yarn is a polyester stretch fiber yarn,
The blend ratio of each material is 70-85 wt% polyester fiber, 13-25 wt% cotton fiber, and 1-4 wt% conductive thread.

The garment of the present invention is a garment that contains the above-mentioned antistatic fabric.

The present invention provides an antistatic fabric that includes conductive and non-conductive yarns and that is arranged at intervals in the warp and weft. At least the conductive yarns arranged in the warp are composite core-sheath conductive yarns, the core of which is a yarn containing polyester fibers and cellulose fibers, and the sheath of which is a conductive yarn. This makes it possible to provide an antistatic fabric and antistatic clothing that are well-balanced in terms of sweat absorption, quick-drying properties, comfort, and wrinkle resistance.

FIG. 1 is a schematic plan view of an antistatic fabric according to one embodiment of the present invention. FIG. 2A is a schematic cross-sectional view of a single-covered yarn according to one embodiment of the present invention, and FIG. 2B is a schematic cross-sectional view of a double-covered yarn according to the same embodiment.

The present invention is an antistatic fabric that includes conductive and nonconductive yarns, and that is arranged at intervals between the warp and weft yarns. Nonconductive yarns are arranged between the conductive yarns. At least the conductive yarns arranged in the warp yarns are core-sheath composite conductive yarns, with the core being a yarn containing polyester fiber and cellulose fiber, and the sheath being a conductive yarn. The core is preferably a blend of polyester and cotton. Since the sheath is a conductive yarn, the antistatic effect is high. Examples of conductive yarns used in the sheath include "Curacarbo" manufactured by Kuraray Co., Ltd. and "Belltron" manufactured by KB Seiren Co., Ltd., and core-sheath composite conductive yarns in which the conductive component is arranged on the surface side are preferred. Examples of nonconductive yarns include synthetic fibers and natural fibers, i.e., filament yarns or spun yarns of polyester, nylon, etc., blends of staples of polyester, nylon, etc. with rayon staples, cotton fibers, etc., and the like.

The non-conductive warp yarn is preferably a blend of polyester and cellulose fibers. Cellulosic fibers have good sweat absorption and comfort, while polyester fibers have good quick-drying properties, comfort and wrinkle resistance. The cellulose fiber is preferably cotton.

The conductive yarn arranged in the weft is preferably a core-sheath composite conductive yarn, with the core being a yarn containing polyester fiber and cellulose fiber, and the sheath being a conductive yarn. This results in a woven fabric with a good balance of antistatic properties, sweat absorption, quick-drying properties, comfort, and wrinkle resistance.

The conductive yarn arranged in the weft is preferably a core-sheath composite conductive yarn, with the core being polyester stretch fiber yarn and the sheath being conductive yarn. The non-conductive yarn in the weft is preferably polyester stretch fiber yarn. In the case of work trousers, arranging the stretch fiber yarn in the length direction of the lower body makes it easier to bend the knees and waist during work. In the case of a work jacket, arranging the stretch fiber yarn in the width direction of the body makes it easier to work with the shoulders and upper arms. Examples of stretch fiber yarn include false-twisted polyethylene terephthalate multifilament yarn and polyester conjugate multifilament yarn.

The antistatic fabric of the present invention preferably has a stretchability of 8% or more in the weft direction, as measured according to JIS L1096 Method B (constant load method). This facilitates the above-mentioned work operations. It is also preferable to apply existing water absorption processing. As for the blend ratio of each material, a well-balanced ratio of polyester fiber, cotton, and conductive yarn in the sheath is preferably 70 to 85 wt% polyester fiber, 13 to 25 wt% cotton, and 1 to 4 wt% conductive yarn.

It is preferable that the core-sheath composite conductive yarn is at least one selected from single-covered yarn and double-covered yarn. This results in a conductive yarn with high strength.

The antistatic fabric of the present invention has a two-point electrical resistance measured according to IEC (International Electrotechnical Commission) 61340-5-1 of preferably less than 1× ¹⁰ Ω, more preferably less than 1× ¹⁰ Ω, and even more preferably less than 1× ¹⁰ Ω, thereby providing a fabric with a high antistatic effect.

The antistatic clothing of the present invention includes the antistatic fabric described above. The clothing is preferably work clothing. Suitable work clothing includes tops such as shirts and jumpers, bottoms such as slacks and skirts, and overalls.

The antistatic fabric of the present invention may have any weave, but is preferably made of a plain weave. A plain weave fabric maintains good shape retention. The warp and weft threads constituting the plain weave fabric are preferably arranged such that one conductive thread is arranged for every 5 to 30 nonconductive threads. This allows the fabric to exhibit antistatic properties. The mass per unit area (basis weight) of the fabric is preferably 50 to 500 g/ ^m2 , more preferably 100 to 450 g/ ^m2 , and particularly preferably 140 to 300 g/ ^m2 .

The breathable fabric of the present invention will be described below with reference to the drawings. In the following description of the drawings, the same reference numerals indicate the same objects. FIG. 1 is a schematic plan view of an antistatic fabric 1 according to one embodiment of the present invention. In this antistatic fabric 1, the warp threads are composed of conductive yarns 2a and non-conductive yarns 2b, and the conductive yarns 2a are arranged one per 19 non-conductive yarns 2b. Similarly, the weft threads are composed of conductive yarns 3a and non-conductive yarns 3b, and the conductive yarns 3a are arranged one per 15 non-conductive yarns 3b. As an example, the conductive yarns 2a and 3a use the yarns described in the following FIG. 2A and FIG. 2B. The weave structure is a plain weave structure. As an example, the non-conductive yarns 2b and 3b are as follows:
・Blended yarn containing polyester staple fiber and cellulose staple fiber ・Spun cross-twisted yarn containing polyester staple fiber and cellulose staple fiber ・Spun cross-twisted yarn containing polyester filament fiber and cellulose staple fiber ・Interlaced yarn containing polyester filament fiber and cellulose filament fiber ・Polyester stretch fiber yarn (such as false twist multifilament yarn)

2A is a schematic cross-sectional view of a single covering yarn 4 according to one embodiment of the present invention. One conductive sheath yarn 6 is wound around a non-conductive core yarn 5. The twist factor K of the conductive sheath yarn 6 is preferably 500 to 600.
2B is a schematic cross-sectional view of a double covering yarn 7 according to one embodiment of the present invention. Two conductive sheath yarns 9, 10 are wound around a non-conductive core yarn 8 in the S and Z directions. The primary twist coefficient _K1 of the conductive sheath yarn 9 is preferably 500 to 600, and the secondary twist coefficient _K2 of the conductive yarn 10 is preferably 550 to 650. As an example, the core yarn and the sheath yarn are as follows.
(1) Core yarn, blended yarn containing polyester staple fiber and cellulose staple fiber, spun cross-twisted yarn containing polyester staple fiber and cellulose staple fiber, spun cross-twisted yarn containing polyester filament fiber and cellulose staple fiber, intertwined yarn containing polyester filament fiber and cellulose filament fiber, polyester stretch fiber yarn (such as false-twisted multifilament yarn)
(2) Conductive yarn made of sheath yarn and multifilament yarn

The present invention will be described in more detail below with reference to examples, although the present invention is not limited to the following examples.
The evaluations in the examples are as follows.
<Antistatic properties>
The two-point electrical resistance value specified in IEC (International Electrotechnical Commission) 61340-5-1 was measured. This measurement was requested and reported by a third-party organization, the Technology Association of Industrial Safety, a public interest corporation.
<Other physical properties>
Other physical properties were measured in accordance with the Japanese Industrial Standards (JIS) or measurements performed in the industry.

The materials used in the examples are as follows. In the following, unless otherwise specified, polyester is polyethylene terephthalate (PET).
<Conductive thread>
A1: A core-sheath composite conductive yarn having a core made of one blended yarn (cotton count 34) of 65% polyester staple fiber and 35% cotton by mass, and a sheath made of two double-covered "Curacarbo" (conductive filament yarn) manufactured by Kuraray.
A2: A core-sheath composite conductive yarn having a core made of one blended yarn (cotton count 16) of 65% polyester staple fiber and 35% cotton by mass, and a sheath made of two double-covered "Curacarbo" (conductive filament yarn) manufactured by Kuraray.
A3: A core-sheath composite conductive yarn consisting of one core of 165decitex polyester multifilament false twist yarn and two sheath strands of Kuraray's product name "Curacarbo" (conductive filament yarn) that are double covered.
A4: A core-sheath composite conductive yarn consisting of two 330 decitex polyester multifilament false twist yarns as the core and two double-covered "Curacarbo" (conductive filament yarn) strands as the sheath manufactured by Kuraray.
A5: A core-sheath composite conductive yarn having a core made of one blended yarn (cotton count 16) of 65% polyester staple fiber and 35% cotton by mass, and a sheath made of two single-covered "Curacarbo" (conductive filament yarn) manufactured by Kuraray.
A6: A core-sheath composite conductive yarn having a core made of one blended yarn (cotton count 16) of 65% polyester staple fiber and 35% cotton by mass, and a sheath made of three single-covered "Curacarbo" (conductive filament yarn) manufactured by Kuraray.
<Non-conductive yarn 1: Non-stretch material>
B1: 1 piece of blended yarn of 65% recycled PET staple fiber and 35% cotton (cotton count 34) B2: 1 piece of blended yarn of 65% commercially available regular polyester staple fiber and 35% cotton (cotton count 34) B3: 1 piece of blended yarn of 65% recycled PET staple fiber and 35% cotton (cotton count 20) B4: 1 piece of blended yarn of 65% recycled PET staple fiber and 35% cotton (cotton count 16) <Non-conductive yarn 2: Stretch material>
C1: Polyester multifilament pin-twist yarn (semi-dull) 165 decitex, 1 strand C2: Polyester multifilament pin-twist yarn (semi-dull) 330 decitex, 1 strand C3: Polyester multifilament false-twist woolly yarn 165 decitex, 1 strand C4: Polyester multifilament false-twist woolly yarn 165 decitex double yarn, 1 strand

(Example 1 , Reference Example )
Warp threads: 21 threads of the B2 type described above were continuously arranged as non-conductive threads, and one thread of the A1 type described above was arranged between them as a conductive thread.
Weft yarn: 15 C4 yarns were continuously arranged as non-conductive yarns, and one A2 yarn was arranged between them as a conductive yarn.
Fabric structure: Plain weave Fabrics were woven as described above. In Example 1, water absorption treatment was also performed.

(Examples 2 to 6 , Examples 2, 5 to 6 are reference examples )
The same procedure as in Example 1 was carried out except as shown in Table 1. The yarn used is also shown in Table 1 for Example 1, the blend ratio of each material is shown in Table 2, and the fabric evaluation is summarized in Table 3. Note that Examples 2 to 4 were subjected to a water-absorbent treatment.

As is clear from Tables 1 to 3, the woven fabrics of each embodiment of the present invention had good antistatic properties and good dimensional stability after washing. In addition, work clothes (jackets) were sewn using the woven fabrics of each embodiment of the present invention. These work clothes (jackets) had a good balance of sweat absorption, quick drying, comfort, and wrinkle resistance, could be washed at home, and were comfortable to wear. In addition, the woven fabrics of Examples 3 and 4 had good elasticity, making them work clothes that were easy to work in.

The breathable fabric of the present invention is suitable for work clothes, uniforms, tops, bottoms, coveralls, etc.

1 Antistatic fabric 2a Warp conductive yarn 2b Warp non-conductive yarn 3a Weft conductive yarn 3b Weft non-conductive yarn 4 Single covering yarn 5, 8 Non-conductive yarn
6, 9, 10 Conductive thread
7. Double covering thread

Claims (7)

An antistatic fabric comprising conductive yarns and non-conductive yarns, the conductive yarns being arranged at intervals between warp yarns and weft yarns,
The conductive yarn arranged in the warp is a core-sheath composite conductive yarn, the core being a yarn containing polyester fiber and cotton fiber, and the sheath being a conductive yarn;
The non-conductive warp yarns include a blend of polyester and cellulose fibers;
The conductive yarn arranged in the weft is a core-sheath composite conductive yarn, the core being a polyester stretch fiber yarn and the sheath being a conductive yarn,
The non-conductive weft yarn is a polyester stretch fiber yarn,
The antistatic fabric has a stretchability of 8% or more in the weft direction, as measured by JIS L1096 B method (constant load method);
The antistatic fabric is characterized in that the blend ratio of each material is 70 to 85 wt % polyester fiber, 13 to 25 wt % cotton fiber, and 1 to 4 wt % conductive thread. An antistatic fabric according to claim 1, wherein the nonconductive warp yarn is a blend of polyester and cellulose fibers. 3. The antistatic fabric according to claim 1 , wherein the nonconductive polyester stretch fiber yarn of the weft is a false twisted polyethylene terephthalate multifilament yarn or a polyester conjugate multifilament yarn . The antistatic fabric according to any one of claims 1 to 3 , wherein the core-sheath composite conductive yarn is at least one selected from a single-covered yarn and a double-covered yarn. 5. The antistatic fabric according to claim 1, wherein the two-point electric resistance of the antistatic fabric, as measured according to IEC (International Electrotechnical Commission) 61340-5-1, is less than 1×10 ¹¹ Ω. An antistatic garment comprising the antistatic fabric according to any one of claims 1 to 5 . 7. The antistatic garment according to claim 6 , wherein the garment is a work uniform.