JP2008303477A - Antistatic woven fabric and dustproof clothes - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an antistatic woven fabric which has the excellent characteristics of polyester fibers, such as fiber strength, good washing durability, and excellent antistaticity and dust-collecting efficiency, and to provide a dustproof clothes. <P>SOLUTION: In the antistatic woven fabric in which composite yarns including moisture-absorbing synthetic fiber yarns A having an equilibrium moisture absorption coefficient of ≥1% in conditions having a temperature of 20°C and a humidity of 40% RH, and polyester fiber yarns B are blended in at least either of warps and wefts, the cover factor of the woven fabric is 2,000 to 3,800 defined by the following equation, and the air permeability of the woven fabric is ≤6 cc/cm<SP>2</SP>/sec, and the dustproof clothes uses the antistatic woven fabric. Therein, CF=(DWp/1.1)<SP>1/2</SP>×MWp+(DWf/1.1)<SP>1/2</SP>×MWf [wherein DWp is a warp total fineness(dtex); MWp is a warp woven density (warps/2.54 cm); DWf is a weft total fineness (dtex); and MWf is a warp woven density (warps/2.54 cm)]. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an antistatic fabric and a dust-proof garment having excellent antistatic properties and dust collecting properties with good washing durability.

  Conventionally, for textiles for work clothes worn at the manufacturing site or processing site of electronic devices, pharmaceuticals, medical devices, foods, etc., polyester fibers are used because they are excellent in form stability, mechanical strength, heat resistance, etc. Mainly used. However, since polyester fibers, which are hydrophobic synthetic fibers, have a low moisture absorption rate, fabrics composed of such fibers may have a problem of generation of static electricity under low humidity. In particular, a higher anti-static performance is required for a dust-proof garment worn in a manufacturing site (clean room) of precision equipment such as semiconductors and hard disk heads.

As a method of imparting antistatic performance to a woven or knitted fabric made of polyester fiber, a method of weaving a yarn containing conductive synthetic fibers into the woven fabric and coating the surface of the woven or knitted fabric with post-processing of antistatic resin is proposed. (For example, refer to Patent Document 1).
However, the fabric obtained by such a method does not have sufficient antistatic washing durability, and the antistatic resin coated on the surface of the fabric becomes a source of dust generation, and is used in a dustproof garment worn at the manufacturing site of precision equipment. There was a problem of being unsuitable.

  Patent Document 2 proposes that an antistatic woven or knitted fabric is obtained using a composite yarn composed of a hygroscopic synthetic fiber yarn and a polyester fiber yarn, and then a dustproof garment is produced using the woven or knitted fabric. However, such dust-proof clothing lacks dust collection efficiency, and dust generated from the surface of the human body passes through the dust-proof clothing and leaks into the clean room. It turned out to be sufficient.

JP 2001-164474 A JP 2006-328568 A

  The present invention has been made in view of the above-mentioned background, and its purpose is to combine the excellent characteristics of polyester fibers such as fiber strength, and to have antistatic properties with excellent washing durability and dust collection rate. It is to provide textiles and dust-proof clothing.

  As a result of intensive studies to achieve the above-described problems, the present inventors have obtained that a desired antistatic fabric can be obtained by obtaining a fabric with low air permeability using a hygroscopic synthetic fiber yarn and a polyester fiber yarn. By using yarns with fineness and a large number of filaments, and / or by adopting calendering, it has been found that such a low air permeability antistatic fabric can be obtained, and further investigations The present invention has been completed.

Thus, according to the present invention, “a composite yarn composed of a hygroscopic synthetic fiber yarn A having an equilibrium moisture absorption rate of 1% or more under the conditions of a temperature of 20 ° C. and a humidity of 40% RH and the polyester fiber yarn B, warp and weft A woven fabric arranged in at least one of them, the cover factor of the woven fabric defined by the following formula is in the range of 2000 to 3800, and the air permeability of the woven fabric is 6 cc / cm ² / An antistatic fabric characterized in that it is less than or equal to sec "is provided.
CF = (DWp / 1.1) ^1/2 × MWp + (DWf / 1.1) ^1/2 × MWf
[DWp is the total warp fineness (dtex), MWp is the warp weave density (main / 2.54 cm), DWf is the total weft fineness (dtex), and MWf is the weft weave density (main / 2.54 cm). ]

  At that time, the ratio DA / DB of the yarn length DA of the hygroscopic synthetic fiber yarn A and the yarn length DB of the polyester fiber yarn B contained in the composite yarn is preferably 0.7 or more. The hygroscopic synthetic fiber yarn A is preferably composed of hygroscopic polyether ester fibers made of a polyether ester elastomer having polybutylene terephthalate as a hard segment and polyoxyethylene glycol as a soft segment. On the other hand, it is preferable that the said polyester fiber yarn B is comprised with a polyethylene terephthalate fiber.

In the antistatic fabric of the present invention, the woven fabric is a polyester fiber yarn C in which the composite yarn is arranged only in one of warp and weft, and the other is a single yarn fineness of 1.0 dtex or less and a filament number of 50 or more. It is preferable that the woven fabric is woven. Moreover, it is preferable that the fabric is calendered. Moreover, it is preferable that the frictional voltage after 50 washings is 300 V or less. Moreover, it is preferable that the amount of dust generation of 0.5 micrometer or more after washing 50 times is 20 pieces / liter or less. Moreover, it is preferable that the collection efficiency of the dust of 0.3 micrometer or more measured by the method prescribed | regulated by IES-RP-3-001-1985 method is 70% or more.
Moreover, according to this invention, the dust-proof garment comprised with the said antistatic fabric is provided.

  ADVANTAGE OF THE INVENTION According to this invention, the antistatic textiles and dust-proof garment which have the outstanding characteristics of polyester fiber, such as fiber strength, have the antistatic property excellent in washing durability, and a dust collection rate are obtained.

Hereinafter, embodiments of the present invention will be described in detail.
First, the hygroscopic synthetic fiber yarn A used in the present invention needs to have an equilibrium moisture absorption rate of 1% or more (preferably 1 to 5%) under the conditions of a temperature of 20 ° C. and a humidity of 40% RH. If the equilibrium moisture absorption is less than 1%, sufficient antistatic performance cannot be obtained, which is not preferable. The higher the equilibrium moisture absorption rate, the better the antistatic performance. However, if the equilibrium moisture absorption rate is too high, it may be difficult to produce the fiber, so it may be 5% or less.

In addition, the equilibrium moisture absorption as used in the field of this invention is measured with the following method. That is, after collecting yarn and collecting a sample of about 10 g, the mass after absolutely dry is measured according to JIS 1013-1998. Next, after the sample is allowed to stand for 24 hours in an environment of a temperature of 20 ° C. and a humidity of 40% RH, the mass after moisture absorption is taken as the mass after moisture absorption, and the equilibrium moisture absorption rate is calculated by the following equation.
Equilibrium moisture absorption (%) = ((mass after moisture absorption) − (mass after absolute drying)) / (mass after absolute drying) × 100

  Examples of the fibers constituting the hygroscopic synthetic fiber yarn A include, for example, polyether ester fibers made of polyether ester elastomers having polybutylene terephthalate as a hard segment and polyoxyethylene glycol as a soft segment, and polyacrylic acid metal salts. Polyester fiber blended with polyacrylic acid and its copolymer, polymethacrylic acid and its copolymer, polyvinyl alcohol and its copolymer, polyacrylamide and its copolymer, polyoxyethylene-based polymer, 5- Examples thereof include polyester fibers copolymerized with a sulfoisophthalic acid component. Among these, polyether ester fibers made of a polyether ester elastomer having polybutylene terephthalate as a hard segment and polyoxyethylene glycol as a soft segment are preferable.

  The polybutylene terephthalate preferably contains at least 70 mol% of butylene terephthalate units. The content of butylene terephthalate is more preferably 80 mol% or more, and still more preferably 90 mol% or more. The acid component is mainly composed of terephthalic acid, but a small amount of other dicarboxylic acid components may be copolymerized. The glycol component is mainly composed of tetramethylene glycol, but other glycol components are copolymerized. It may be added as a component.

  Examples of dicarboxylic acids other than terephthalic acid include naphthalenedicarboxylic acid, isophthalic acid, diphenyldicarboxylic acid, diphenyloxyethanedicarboxylic acid, β-hydroxyethoxybenzoic acid, p-oxybenzoic acid, adipic acid, sebacic acid, and 1,4- Examples thereof include aromatic and aliphatic dicarboxylic acid components such as cyclohexanedicarboxylic acid. Further, a tricarboxylic or higher polycarboxylic acid such as trimellitic acid or pyromellitic acid may be used as a copolymerization component as long as the achievement of the object of the present invention is not substantially impaired.

  Examples of diol components other than tetramethylene glycol include aliphatic, alicyclic and aromatic diol compounds such as trimethylene glycol, ethylene glycol, cyclohexane-1,4-dimethanol, and neopentyl glycol. Can do. Furthermore, a trifunctional or higher functional polyol such as glycerin, trimethylolpropane, or pentaerythritol may be used as a copolymerization component as long as the achievement of the object of the present invention is not substantially impaired.

On the other hand, the polyoxyethylene glycol preferably contains at least 70 mol% or more of oxyethylene glycol units. The content of oxyethylene glycol is more preferably 80 mol% or more, and still more preferably 90 mol% or more. In addition to oxyethylene glycol, propylene glycol, tetramethylene glycol, glycerin and the like may be copolymerized within a range where the achievement of the object of the present invention is not substantially impaired.
The number average molecular weight of such polyoxyethylene glycol is preferably 400 to 8000, and particularly preferably 1000 to 6000.

  The polyether ester elastomer is obtained, for example, by subjecting a raw material containing dimethyl terephthalate, tetramethylene glycol and polyoxyethylene glycol to a transesterification reaction in the presence of a transesterification catalyst to produce bis (ω-hydroxybutyl) terephthalate and / or Alternatively, it can be obtained by forming an oligomer and then performing melt polycondensation under high temperature and reduced pressure in the presence of a polycondensation catalyst and a stabilizer.

The ratio of hard segment / soft segment is preferably 30/70 to 70/30 based on weight.
It is preferable that a known organic sulfonic acid metal salt is contained in such a polyether ester, since a further excellent antistatic property can be obtained.

  The polyether ester fiber is obtained by melting and extruding the polyether ester from a normal melt spinneret, and taking it out at a take-up speed of 300 to 1200 m / min (preferably 400 to 980 m / min). It can manufacture by winding at 1.0-1.2 (preferably 1.0-1.1) of taking-up speed.

  The total fineness, single yarn fineness, and number of filaments of the hygroscopic synthetic fiber yarn A are not particularly limited, but the total fineness is 30 to 200 dtex, the single yarn fineness is 0.6 to 100 dtex, and the number of filaments is 1 to 1 in terms of dust resistance and productivity. A range of 10 is preferred.

  In the present invention, examples of the polyester forming the polyester fiber yarn B include polyethylene terephthalate and polytrimethylene terephthalate. Such a polyester may contain a known organic sulfonic acid metal salt or may be copolymerized with isophthalic acid. The polyester fiber yarn B may be one obtained by spinning and stretching these polyester polymers by a conventional method. The polyester fiber yarn B preferably has an equilibrium moisture absorption rate of less than 1% under conditions of a temperature of 20 ° C. and a humidity of 40% RH.

  The total fineness, single yarn fineness, and the number of filaments of the polyester fiber yarn B are not particularly limited, but the total fineness is 20 to 300 dtex, the single yarn fineness is 0.3 to 10 dtex, and the number of filaments is 1 to 200 in terms of dust resistance, texture, and productivity. The book range is preferred. If the single yarn fineness is larger than the above, the texture of the fabric becomes hard and the dust collection efficiency may be reduced. On the other hand, if the thickness is smaller than the above, fluff is likely to occur due to friction, which may cause dust generation.

  In the hygroscopic synthetic fiber yarn A and the polyester fiber yarn B, the fiber form needs to be long fibers. These yarns may be subjected to normal false twist crimping. Further, the cross-sectional shape of the single yarn fiber constituting the hygroscopic synthetic fiber yarn A or the polyester fiber yarn B is not particularly limited, and a known cross-sectional shape such as a round shape, a triangular shape, a flat shape, a flat shape with a constriction, a petal, or a hollow shape can be adopted. .

  In the hygroscopic synthetic fiber yarn A and the polyester fiber yarn B, in the polymer forming the fiber, a fine pore forming agent, a cationic dye dyeing agent, and the like, as long as the object of the present invention is not impaired, One or more kinds of anti-coloring agent, heat stabilizer, fluorescent brightening agent, matting agent, coloring agent, hygroscopic agent and inorganic fine particles may be contained.

  In the present invention, the ratio DA / DB of the yarn length DA of the hygroscopic synthetic fiber yarn A and the yarn length DB of the polyester fiber yarn B contained in the composite yarn is 0.7 or more (preferably 0.8 to 1.4). And particularly preferably 0.8 to 1.2). When the ratio DA / DB is less than 0.7, the hygroscopic synthetic fiber yarn A is difficult to be exposed on the surface of the composite yarn, and sufficient antistatic property may not be obtained. On the contrary, when the ratio DA / DB is larger than 1.4, the processability when weaving and knitting may be deteriorated.

  In the composite yarn, as the weight ratio of the hygroscopic synthetic fiber yarn A and the polyester fiber yarn B, the weight of the hygroscopic synthetic fiber yarn A in an atmosphere of a temperature of 20 ° C. and a humidity of 65% RH is WA, while polyester When the weight of the fiber yarn B is WB, it is preferable that WA: WB is in the range of 70:30 to 5:95. If the weight of the hygroscopic synthetic fiber yarn A is smaller than the above range, sufficient antistatic property may not be obtained. Moreover, when the weight of the polyester fiber yarn B is smaller than the above range, the excellent properties of the polyester fiber such as fiber strength may be impaired.

  Examples of the composite method of the composite yarn include interlace air processing, covering processing, and even false false twist crimp processing. Of these, interlaced air processing or covering processing is particularly preferable in obtaining the yarn length difference as described above. In order to make the yarn length difference as described above, during the composite processing, after either one of the hygroscopic synthetic fiber yarn A and the non-hygroscopic synthetic fiber yarn B is stretched, the composite processing is performed by aligning with the other. Good. When such a composite yarn is twisted at a twist number of 100 times / m or more (preferably 300 to 1000 times / m), the hygroscopic synthetic fiber yarn A is easily exposed on the surface of the composite yarn, and has excellent control. Electricity is obtained, which is preferable.

  In the antistatic composite yarn of the present invention, the hygroscopic synthetic fiber yarn A and / or the polyester fiber yarn B is not limited to a single yarn, and may be a plurality of yarns. It should be noted that other yarns may be included as the third yarn as long as the main purpose of the present invention is not impaired.

  Next, the antistatic fabric of the present invention is a fabric woven by arranging the composite yarn on at least one of warp and weft. The structure of the woven or knitted fabric is not particularly limited, and may be woven by a normal weaving method. For example, Mihara organization such as plain weave, oblique weave, and satin weave, change organization, change organization such as change oblique weave, vertical double weave, single double organization such as weft double weave, vertical velvet, etc. Is done. The number of layers may be a single layer or a multilayer of two or more layers.

  Also, various functions that provide functions such as ordinary dyeing finish processing, weight loss processing, water repellent processing, brushed processing, UV shielding or antibacterial agents, deodorants, insect repellents, phosphorescent agents, retroreflective agents, negative ion generators, etc. Processing may be additionally applied. In particular, it is particularly preferable to perform calendering in order to obtain excellent dust collection efficiency. At that time, the calendering conditions are preferably a linear pressure of 392 to 784 N / cm (40 to 80 kgf / cm) and a hot roll temperature of 140 to 180 ° C.

In the woven fabric thus obtained, a cover factor in the range of 2000 to 3800 is important for obtaining excellent dust collection efficiency. When the cover factor is 2000 or less, the dust collection efficiency is low, which is not preferable for a dust-proof garment worn at the manufacturing site of precision equipment. When the cover factor is 3800 or more, the dust collection efficiency is excellent, but the texture and wearing comfort may be impaired. The cover factor CF in the present invention is represented by the following formula.
CF = (DWp / 1.1) ^1/2 × MWp + (DWf / 1.1) ^1/2 × MWf
[DWp is the total warp fineness (dtex), MWp is the warp weave density (main / 2.54 cm), DWf is the total weft fineness (dtex), and MWf is the weft weave density (main / 2.54 cm). ]

  The woven fabric preferably contains 5% or more (more preferably 40% or more, particularly preferably 100%) of the composite yarn with respect to the total weight of the woven fabric. In this case, for example, the composite yarn and the other yarn may be alternately arranged one by one or a plurality of other yarns. However, when the total amount of warp and / or the total amount of weft is the composite yarn, excellent antistatic It is preferable because of its good properties.

In the woven fabric of the present invention, the air permeability is 6 cc / cm ² / sec or less (preferably 1 to 5.5 cc / cm ² / sec), which is important for obtaining excellent dust collection efficiency. . When the air permeability is higher than 6 cc / cm ² / sec, when dust-proof clothing is obtained using the fabric, the dust collection efficiency is insufficient, and dust generated from the human body surface passes through the dust-proof clothing and is clean room. Since it leaks in, it is not preferable.

  In order to obtain such a low air permeability, the woven fabric is calendered as described above, and / or the composite yarn is arranged only in one of the warp and the weft, and the other is a single yarn. It is preferable that polyester fiber yarns C having a fineness of 1.0 dtex or less (preferably 0.1 to 0.9 dtex) and 50 or more filaments (preferably 50 to 200) are arranged and woven. When the polyester fiber yarn C is disposed in the woven fabric, the inter-structure void formed by the warp and the weft is reduced, and an excellent dust collection efficiency is obtained. Here, the total fineness of the polyester fiber yarn C is preferably in the range of 30 to 200 dtex. If the total fineness of the polyester fiber yarn C is less than 30 dtex, even if the cover factor of the fabric is increased, sufficient dust collection efficiency may not be obtained. On the contrary, if the total fineness of the polyester fiber yarn C is larger than 200 dtex, the thickness of the woven fabric becomes too large and the texture may be lowered. The polyester fiber yarn C is preferably a long fiber obtained by spinning and stretching a polyester polymer similar to the polyester fiber yarn B by a conventional method.

  Since the antistatic fabric of the present invention contains the above-described composite yarn, the antistatic property is imparted by the hygroscopic synthetic fiber yarn A included in the composite yarn. In particular, when the yarn length ratio between the hygroscopic synthetic fiber yarn A and the polyester fiber yarn B is in the above range, the hygroscopic synthetic fiber yarn A is exposed on the surface of the woven or knitted fabric, and excellent antistatic properties are obtained. In addition, since antistatic property is not imparted by so-called antistatic processing in which antistatic resin or the like is attached to the surface of the fabric by post-processing, it has excellent washing durability and low dust generation due to friction or the like. Here, the frictional voltage after 50 washings is preferably 300 V or less. Further, the amount of dust generation of 0.5 μm or more after 50 washings is preferably 20 pieces / liter or less.

Moreover, in the antistatic fabric of this invention, since air permeability is as low as 6 cc / cm < ² > / sec or less, it exhibits the outstanding dust collection efficiency. As such dust collection efficiency, it is preferable that the dust collection efficiency of 0.3 μm or more measured by the method defined by the IES-RP-3-001-1985 method is 70% or more.

  Next, the dust-proof garment of this invention is a dust-proof garment comprised with the said antistatic fabric. In particular, it can be suitably used as a dust-proof garment worn at the manufacturing site (clean room) of precision equipment such as semiconductors and hard disk heads. Since the dust-proof garment is generally washed periodically to remove the attached dust, the dust-proof garment of the present invention does not require frequent renewal, is efficient, and does not cost.

Next, although the Example and comparative example of this invention are explained in full detail, this invention is not limited by these. In addition, each measurement item in an Example was measured with the following method.
<Equilibrium moisture absorption rate>
After collecting the yarn and collecting a sample of about 10 g, the mass after absolute drying was measured according to JIS 1013-1998. Next, the sample was allowed to stand for 24 hours in an environment of a temperature of 20 ° C. and a humidity of 40% RH, and the mass after moisture absorption was taken as the mass after moisture absorption.
Equilibrium moisture absorption (%) = ((mass after moisture absorption) − (mass after absolute drying)) / (mass after absolute drying) × 100
<Cover factor (CF)>
It was calculated by the following formula.
CF = (DWp / 1.1) ^1/2 × MWp + (DWf / 1.1) ^1/2 × MWf
[DWp is the total warp fineness (dtex), MWp is the warp weave density (main / 2.54 cm), DWf is the total weft fineness (dtex), and MWf is the weft weave density (main / 2.54 cm). ]
<Measurement of yarn length>
After leaving the woven fabric in an atmosphere of temperature 20 ° C. and humidity 65% RH for 24 hours, the composite yarn is taken out from the woven fabric and cut into a length of 30 cm (n number = 5). Subsequently, the hygroscopic synthetic fiber yarn A and the polyester fiber yarn B are taken out one by one. In the case of an elastic yarn, a load of 0.0088 mN / dtex (1 mg / de) is applied. A load of 1.76 mN / dtex (200 mg / de) was applied to measure the yarn length DA (mm) of the hygroscopic synthetic fiber yarn A and the yarn length DB (mm) of the polyester fiber yarn B. Then, (average value of yarn length DA) / (average value of yarn length DB) is defined as DA / DB.
<Friction band voltage>
The frictional voltage (V) was measured by n number 3 by the method defined by JIS L 1094 B method. The measurement environment was a temperature of 20 ± 2 ° C. and a humidity of 40 ± 2% RH.
<Dust generation amount>
The generated dust of 0.5 μm or more was counted with a particle counter by the IES Helmke Drum method.
<Washing conditions>
It implemented by the method prescribed | regulated by JISL0217103 method. This was repeated 50 times.
<Air permeability>
The air permeability of the woven fabric was measured by a method defined by JIS L1096-90A method.
<Collection efficiency>
The textile collection efficiency was measured by the method prescribed by the IES-RP-3-001-1985 method, and the collection efficiency of dusts of 0.3 μm or more was 70% or more, which was regarded as acceptable.

[Example 1]
Polyetherene terephthalate (49.8 parts by weight) as a hard segment and polyether ester (50.2 parts by weight of polyoxyethylene glycol having a number average molecular weight of 4000 as a soft segment) are melted at 230 ° C. and discharged from a predetermined spinneret. Extruded at 3.05 g / min. The polymer was drawn through two godet rolls at 705 m / min, and further wound at 750 m / min (winding draft 1.06) to obtain 44 dtex / 1 filament hygroscopic polyetherester fiber (hygroscopic synthetic fiber). Yarn A) was obtained. The moisture absorption rate of this hygroscopic polyetherester fiber at a temperature of 20 ° C. and a humidity of 40% RH was 1.9%.
On the other hand, a multifilament yarn (56 dtex / 24 filament, single yarn fineness 2.3 dtex) made of ordinary polyethylene terephthalate was prepared as the polyester fiber yarn B.

Next, using an ordinary interlace processing machine, the hygroscopic polyether ester fiber is drawn to a draft rate of 105% (1.05 times) while being aligned with the polyester fiber yarn B, and the air pressure is set at 0. 0. Ordinary interlacing was performed at 21 MPa (2.1 kg / cm ² ) to obtain a composite yarn.
Next, a multifilament yarn (56 dtex / 72 filament, single yarn fineness 0.78 dtex) made of ordinary polyethylene terephthalate is used as the weft, using the yarn obtained by twisting the composite yarn at 600 times / m (S direction) as the weft. A twill-textured woven fabric machine was obtained by a normal weaving method at a weaving density of warp density of 145 / 2.54 cm and weft density of 99 / 2.54 cm. The fabric raw machine was subjected to a usual dyeing finish.
In the obtained woven fabric, the warp density was 207 / 2.54 cm, the weft density was 104 / 2.54 cm, the cover factor CF was 2641, DA / DB was 0.95, and the air permeability was 5 cc / cm ² / sec. there were. In addition, the frictional voltage was 50V, the repair efficiency was 75%, and after washing 50 times, respectively, 45V and 72%, respectively, and had excellent antistatic property and dust collecting property with good washing durability.

[Comparative Example 1]
The same procedure as in Example 1 was performed except that the warp yarn was changed to a multifilament yarn (56 dtex / 24 filament, single yarn fineness 2.33 dtex) made of ordinary polyethylene terephthalate. In the obtained woven fabric, the warp density was 207 / 2.54 cm, the weft density was 104 / 2.54 cm, the cover factor CF was 2641, DA / DB was 0.95, and the air permeability was 8 cc / cm ² / sec. It was. The frictional voltage was 50 V and the collection rate was 50%, and although the antistatic property was excellent, the collection efficiency was insufficient.

[Example 2]
In Comparative Example 1, the fabric raw machine was subjected to a usual dyeing finish, and then calendered with a thermal calender at a linear pressure of 588 N / cm (60 kgf / cm) and a hot roll temperature of 160 ° C.
In the obtained woven fabric, the warp density was 207 / 2.54 cm, the weft density was 104 / 2.54 cm, the cover factor CF was 2641, DA / DB was 0.95, and the air permeability was 5 cc / cm2 / sec. . In addition, the frictional voltage was 50V, the repair efficiency was 75%, and after washing 50 times, respectively, 45V and 72%, respectively, and had excellent antistatic property and dust collecting property with good washing durability.

  According to the present invention, there are provided an antistatic fabric and a dust-proof garment having excellent antistatic properties and good dust collection efficiency, which have excellent properties of polyester fibers such as fiber strength, and its industrial value. Is extremely large.

Claims (10)

A composite yarn composed of a hygroscopic synthetic fiber yarn A having an equilibrium moisture absorption rate of 1% or more and a polyester fiber yarn B under conditions of a temperature of 20 ° C. and a humidity of 40% RH is arranged on at least one of warp and weft. A woven fabric woven with a covering factor of 2000 to 3800 defined by the following formula, and an air permeability of the woven fabric of 6 cc / cm ² / sec or less. Anti-static fabric.
CF = (DWp / 1.1) ^1/2 × MWp + (DWf / 1.1) ^1/2 × MWf
[DWp is the total warp fineness (dtex), MWp is the warp weave density (main / 2.54 cm), DWf is the total weft fineness (dtex), and MWf is the weft weave density (main / 2.54 cm). ]   The antistatic fabric, wherein the ratio DA / DB of the yarn length DA of the hygroscopic synthetic fiber yarn A and the yarn length DB of the polyester fiber yarn B contained in the composite yarn is 0.7 or more.   The hygroscopic synthetic fiber yarn A is composed of hygroscopic polyether ester fibers made of a polyether ester elastomer having polybutylene terephthalate as a hard segment and polyoxyethylene glycol as a soft segment. The antistatic fabric described.   The antistatic fabric according to any one of claims 1 to 3, wherein the polyester fiber yarn B is composed of polyethylene terephthalate fibers.   A woven fabric in which the composite yarn is woven only in one of warp and weft, and on the other side, a polyester fiber yarn C having a single yarn fineness of 1.0 dtex or less and 50 or more filaments. The antistatic fabric according to any one of claims 1 to 4, wherein   The antistatic fabric according to any one of claims 1 to 5, wherein the fabric is calendered.   The antistatic fabric according to any one of claims 1 to 6, wherein the frictional voltage after 50 washings is 300 V or less.   The antistatic fabric according to any one of claims 1 to 7, wherein a dust generation amount of 0.5 µm or more after washing 50 times is 20 pieces / liter or less.   The antistatic fabric according to any one of claims 1 to 8, wherein the dust collection efficiency of dust of 0.3 µm or more measured by a method defined by the IES-RP-3-001-1985 method is 70% or more. .   A dust-proof garment comprising the antistatic fabric according to claim 1.