JP2006161190A - Conductive synthetic resin filament - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a conductive synthetic resin filament satisfying durability and conductivity at the same time. <P>SOLUTION: The conductive synthetic resin filament comprises a core layer comprising a synthetic resin monofilament or multifilament and a conductive cover layer melt-covered on the surface of the core layer, wherein the the conducive cover layer contains at least a thermoplastic elastomer and the core layer is not exposed after flexing abrasion test corresponding to JIS L-1095-7.10.2B. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a conductive synthetic resin filament that simultaneously satisfies durability and conductivity.

  Conductive filaments are conventionally used in various industrial fields. For example, dry moisture and organic solvents when manufacturing sanitary products such as powder sieving filters such as wheat flour, paper diapers, and sanitary products for the purpose of preventing damage caused by charging during use, and when drying fabrics. Are widely used in applications such as hair brushes and industrial brushes, or at least a part of warps and / or wefts of industrial fabrics such as dryer belts and dryer canvas of paper machines.

  As a conventional conductive filament, a conductive resin obtained by blending conductive carbon black with a synthetic resin as a main raw material is melt-extruded, cooled and hot-drawn into a filament, or one of a sheath component and a core component. A composite filament whose part is a conductive resin has been mainly known.

  However, since these conventional conductive filaments are stretched after melt extrusion, the chain structure of carbon black is destroyed, so that sufficient conductivity cannot be obtained in any case, which is fatal in the manufacturing process. There was a problem.

  As a technique for solving this problem, a technique relating to a conductive synthetic resin filament in which a conductive resin is melt-coated on the surface of a core layer made of a synthetic resin monofilament or multifilament (for example, see Patent Document 1) is known. It has been. However, in this case, since the conductive resin is only coated on the core layer and is not stretched, a conductive filament having good conductive performance can be obtained, but the coating layer is unstretched, that is, not oriented. The structure is very fragile due to being in a state of failure, and the coating layer is scraped off during the weaving process, or the durability against friction is insufficient when repeatedly used as a textile product. As a result, there has been a new problem that the conductive performance of the textile product is lowered.

Therefore, a conductive filament that satisfies both durability and conductivity is demanded in various applications, but has not yet reached the technical problem.
JP 2002-339240 A

  The object of the present invention is to solve the above-mentioned problems in the prior art, that is, to provide a conductive synthetic resin filament that satisfies both durability and conductivity.

  In order to achieve the above object, according to the present invention, there is provided a conductive synthetic resin filament comprising a core layer made of synthetic resin monofilament or multifilament, and a conductive coating layer melt-coated on the surface of the core layer, Provided is a conductive synthetic resin filament, wherein the conductive coating layer contains at least a thermoplastic elastomer, and the core layer is not exposed after a bending wear test according to JIS L-1095-7.10.2B. The

  In the conductive synthetic resin filament of the present invention, the thermoplastic elastomer is an olefin-based elastomer, and the content of the thermoplastic elastomer is 5 to 50% by weight with respect to the entire conductive coating layer. The volume resistivity is less than 1000 Ω · cm, the resin of the core layer and the resin other than the thermoplastic elastomer of the conductive coating layer are composed of the same kind of polymer resin, and the same kind of polymer resin. Is preferably polyethylene terephthalate.

  According to the present invention, as described below, a conductive synthetic resin filament that satisfies both durability and conductivity can be obtained.

  Hereinafter, the present invention will be described in detail.

  The conductive synthetic resin filament of the present invention comprises a core layer made of synthetic resin monofilament or multifilament, and a conductive coating layer that is melt-coated on the surface of the core layer. JIS L-1095-7.10.2B It is characterized in that the core layer is not exposed after the bending wear test according to the above.

  In the conductive synthetic resin filament of the present invention, the polymer resin that forms the core layer is not particularly limited. For example, polyolefins such as polyethylene and polypropylene, polyvinyl chloride, polyvinylidene chloride, 6 nylon, 66 nylon, 610 nylon, Polyamide resins such as 612 nylon and 6/66 copolymer or copolymers thereof, polyethylene terephthalate (hereinafter referred to as PET), polybutylene terephthalate (hereinafter referred to as PBT), polyethylene naphthalate, polycyclohexanedimethylene terephthalate, and other polyesters Or copolymers thereof, fluororesins such as polyvinylidene fluoride, ethylene / tetrafluoroethylene copolymer, tetrafluoroethylene / hexafluoropropylene / vinylidene fluoride copolymer, etc. , Polycarbonates, polyphenylene sulfide (hereinafter, referred to as PPS), polysulfone, acrylate polymer, polyetherimide, polyethersulfone, polyether ether ketone, polyamideimide, polyimide, polyallyl ether nitrile, a liquid crystal polyester.

  Furthermore, the above PET and PBT are a part of the dicarboxylic acid component terephthalic acid, isophthalic acid, 2,6-naphthalenedicarboxylic acid, 1,4-cyclohexanedicarboxylic acid, adipic acid, sebacic acid, dimer acid and sulfone. It may be replaced with an acid metal salt-substituted isophthalic acid or the like, and a part of ethylene glycol or 1,4-butanediol as a glycol component may be diethylene glycol, neopentyl glycol, 1,4-cyclohexanediol, 1 , 4-cyclohexanedimethanol and polyalkylene glycol may be substituted. These may be used as a single component or as a blend of a plurality of components.

  The monofilament or multifilament that forms the core layer is formed by melt-extruding a polymer resin using a kneading extruder such as an extruder or a melt spinning machine such as a pressure melter type, and then cooling, hot-drawing, and heat-setting. The

  In addition, although the monofilament cross-sectional diameter in case a core layer is a monofilament can be suitably selected according to a use, the range of 0.05-3 mm is most used, and in the case of a multifilament, this can be used as a twisted yarn. .

  Moreover, the monofilament or multifilament cross-sectional shape of the monofilament or multifilament forming the core layer is not particularly limited, and for example, a circle, a square, a flat, an ellipse, a half moon, a triangle, a polygon having five or more corners, and a multileaf shape It can be formed into a saddle shape, a hollow shape or the like, but the irregular cross-sectional shape other than the circular shape is preferably a trilobal shape or more in order to improve the adhesion of the conductive polymer resin forming the coating layer. .

  On the other hand, as the conductive polymer resin for forming the conductive coating layer, a polymer resin composition in which carbon black is blended at a high concentration is used. For the polymer resin as the main component, the core layer is formed. Resins similar to those exemplified as the polymer resin can be used.

  Here, the core layer and the conductive coating layer may be different types of polymer resin or the same type of polymer resin, but the same type of polymer resin may be used for the interfacial adhesion between the core layer and the conductive coating layer. This is more preferable because the resistance to bending and wear resistance are improved. Further, when the conductive synthetic resin filament of the present invention is used for industrial textiles such as a dryer belt or a dryer canvas of a paper machine, it is necessary to pass through a heat setting process. The better the dimensional stability, the more the interfacial adhesion between the core layer and the conductive coating layer is maintained. From this viewpoint, the same kind of polymer resin is more preferably polyethylene terephthalate which is a resin having relatively excellent dimensional stability.

  The conductive synthetic resin filament of the present invention is characterized in that the core layer is not exposed after the bending wear test according to JIS L-1095-7.10.2B. When this conductive synthetic resin filament is used, Due to its excellent resistance to bending and abrasion, it is possible to achieve extremely superior durability against friction and impact received by the filament when repeatedly used as a weaving process or a textile product.

  The conductive synthetic resin filament of the present invention includes particles, matting agents, plasticizers, lubricants, flame retardants, deodorants, antibacterial agents, in addition to the synthetic resin and conductive components that are the main raw materials for the conductive coating layer. Additives such as antioxidants, heat resistance agents, light resistance agents, ultraviolet absorbers, color pigments, other functional additives and various modifiers may be included as required.

  In particular, from the viewpoint of improving the durability of the conductive synthetic resin filament, it is necessary to blend a thermoplastic elastomer with the conductive coating layer, and it is particularly preferable to blend an olefin-based elastomer. Although this mechanism is not clear at present, blending a thermoplastic elastomer gives rubber-like flexibility to a non-oriented, brittle and electrically conductive coating layer, especially during friction in a bent state. In addition, the stress concentration on the conductive coating layer is relaxed via the elastomer, so that the entire conductive coating layer is modified to a structure that is less susceptible to wear, resulting in the durability of the conductive synthetic resin filament. Is estimated to improve. Among them, the reason why the olefin-based elastomer is preferable is that the wear property of the elastomer itself is excellent and the blendability with the conductive component is excellent.

  Examples of thermoplastic elastomers include styrene, vinyl chloride, olefin, urethane, polyester, nitrile, polyamide, fluorine, chlorinated polyethylene, 1.2 polybutadiene, transformer 1 / 4IR, silicone, Although a chlorinated ethylene copolymer crosslinked alloy etc. are mentioned, it does not specifically limit, A conventionally well-known thing can be used, For example, it describes in "the chemical product of 12093" (pages 977-980) of a chemical industry daily publication company publication. The thermoplastic elastomer etc. which can be used can also be used. Specific examples of the olefin-based elastomer include, for example, “Miralastomer” manufactured by Mitsui Chemicals, “Santoprene”, “Geolast”, “Trefshin” manufactured by AES Japan, “Sumitomo TPE” manufactured by Sumitomo Chemical, and “Thermoran” manufactured by Mitsubishi Chemical. "Zeras", Nippon Polyolefin "Oreflex", Apco "Miraplane" "Thermo Run", Toyobo "Surlink", Chisso "Newcon", Plus Tech "Amzel", Riken Technos “Multi-use dress tomer” manufactured by Idemitsu Co., Ltd. “Idemitsu TPO” manufactured by Idemitsu Petrochemical Co., Ltd. and the like can be exemplified.

  A thermoplastic elastomer can be added in the range which does not affect the electroconductivity of the electroconductive synthetic resin filament of this invention, and the process passage property in a melt-coating process. In particular, in the case of an olefin-based elastomer, the addition of 5 to 50% by weight, more preferably 15 to 35% by weight, with respect to the entire conductive coating layer, improves durability and process passability in the melt coating process. This is preferable because both can be achieved. When the blend amount of the thermoplastic elastomer is out of the above range, durability and / or process passability tends to be inhibited, which is not preferable.

  In addition, the conductive synthetic resin filament of the present invention has a specific volume resistivity of less than 1000 Ω · cm, especially when a sieving product such as a powder sieving filter such as flour, drying fabric, paper diapers or sanitary products is used. Excellent static resistance when used in warp and / or weft yarns of industrial fabrics such as dryer belts for drying organic solvents and dryer canvas of paper machines, or hair brushes and industrial brushes. It is preferable because an antistatic effect is exhibited. From the same viewpoint, it is preferable that the volume specific resistance value is less than 500 Ω · cm because the electrical conductivity of the product is further improved.

  Moreover, as electroconductive curve black contained in the polymer resin which forms an electroconductive coating layer, the highly conductive carbon black whose DBP oil supply amount (9g method) is 340 ml / 100g or more is preferable. As such carbon black, “Ketjen Black” (trademark) EC and “Ketjen Black” (trademark) EC600JD manufactured by Ketjen Black International are known. Other acetylene blacks are also known.

  The conductive synthetic resin filament of the present invention is obtained by melt-extruding a polymer resin and melt-coating the polymer resin containing conductive carbon black on the surface of the monofilament or multifilament of the core layer that has been cooled, hot-drawn, and heat-set. Therefore, as the polymer resin composition of the conductive coating layer, one containing conductive carbon black at a high concentration of 6 to 30% by weight can be used, and the volume occupied by the conductive polymer resin is small. However, excellent electrical conductivity is exhibited, and a filament excellent in roundness and wire diameter unevenness can be obtained. However, if the carbon black concentration is lower than that, sufficient conductivity cannot be obtained, and if the carbon black concentration is higher than that, the fluidity of the polymer resin is remarkably lowered, and abnormal pressure increase may occur in the die during coating. Arise.

  The polymer resin containing conductive carbon black used as a coating component of the conductive synthetic resin filament of the present invention is obtained by kneading under heating by a known method, for example, a twin-screw kneading extruder or a dough mixer. Can do. At this time, if necessary, functional additives such as thermoplastic elastomers and various modifiers can be kneaded. Alternatively, a functional additive and various modifiers can be dry blended with a polymer resin containing conductive carbon black and directly provided to a melt coating apparatus described later.

  When producing the conductive synthetic resin filament of the present invention, no special method is required for production of the monofilament or multifilament for forming the core layer, and it can be carried out by a known spinning method. Then, the surface of the monofilament or multifilament formed by hot drawing and heat setting is melt coated with a polymer resin containing conductive carbon black by a melt coating apparatus. The melt coating equipment includes an outer diameter detector that measures the wall thickness and outer diameter of the coated polymer resin, feeds back the results automatically, and a feeder and dancer roller that feeds at a constant speed and tension. It is desirable to be equipped.

  In the conductive synthetic resin filament thus obtained, the ratio of the conductive coating layer to the total cross-sectional area is preferably 3 to 60%. When the cross-sectional area ratio of the conductive coating layer is increased, the conductivity is improved, but not only the strength of the yarn is decreased, but also the conductive coating layer is thickened and the wire diameter unevenness is increased, which is not preferable. On the other hand, a small cross-sectional area ratio is not preferable because the conductivity tends to decrease.

  The conductive synthetic resin filament of the present invention having such a configuration has small wire diameter unevenness, and when used as an industrial fabric, for example, a fabric having no weave unevenness and excellent flatness can be obtained.

  Moreover, although the tensile strength of the conductive synthetic resin filament of the present invention varies depending on the use of the yarn, it is particularly preferably 3.0 cN / dtex or more when used as an industrial fabric.

  As described above, the conductive synthetic resin filament of the present invention is an unprecedented new functional filament that satisfies both durability and conductivity at the same time. At least part of warp and / or weft of industrial textiles such as dryer belts and paper machine dryer canvas that dries moisture and organic solvents when manufacturing sanitary products such as filters, fabrics, sanitary products such as paper diapers and physiological products, or hairbrushes and industrial It can be suitably used for each application such as a brush for use.

  Next, the present invention will be specifically described by way of examples. First, the physical properties and performance evaluation methods performed in the examples and comparative examples will be described.

[Cross sectional area ratio]
The conductive synthetic resin filament sample was cut into a thickness of 15 μm with a microtome, and the cross section of the slice was measured using the area measurement function of a digital HD microscope “VH-7000” manufactured by KEYENCE. The area of the irregular cross section was obtained by approximating a polygon with a triangle shape or more.

[Flexible wear resistance]
The conductive synthetic resin filament sample was subjected to a bending wear test according to JIS L-1095-7.10.2B, and the bending wear resistance was evaluated by the following method.

  First, two free rollers provided with a sample contacted on a fixed φ1.0 mm friction element (hard steel wire (SWP-SF)) at an angle of 55 degrees to the left and right of the friction element ( The distance between the rollers was set to 70 mm), and a load of 0.196 cN / dtex was applied to one end of the sample via another free roller. Next, the sample was subjected to 100 contact reciprocating frictions on the friction element under conditions of a contact reciprocation speed of 105 times / minute and a reciprocating stroke of 25 mm.

The cross section of the sample after the bending wear test was observed with a microscope, and the bending wear resistance of the sample was evaluated from the cross-sectional state according to the following criteria.
A: There is almost no wear of the conductive coating layer. (Extremely good bending resistance)
○: Less wear of the conductive coating layer. (Good bending resistance)
Δ: The conductive coating layer is worn, but the core layer is not exposed. (Bend resistance to bending)
X: The conductive coating layer is severely worn and the core layer is exposed. (Poor bending wear resistance).

[Volume resistivity]
Measurement was performed by the following method using a super-insulation meter “SM-10 type” manufactured by Toa Denpa Kogyo Co., Ltd.

After applying dotite to both ends of 5 cm of conductive synthetic resin filament sample and drying for 1 hour, both ends of the sample are sufficiently grasped with crimps (electrodes) with extremely low electrical resistance and applied to measure the resistance value of the sample. The volume resistivity value was obtained by the following formula. The ambient conditions during the measurement were a temperature of 20 ° C. and a humidity of 65%.
Volume resistivity (Ω · cm) = Measured resistance (Ω) × Thread cross-sectional area (cm ² ) / Distance between electrodes (cm)

[durability]
The woven fabric using the conductive synthetic resin filament was evaluated according to the following criteria from the state of the conductive synthetic resin filament in the woven fabric after being continuously used at 400 m / min for 30 days as a dryer belt.
A: No change from before use. (Excellent durability)
◯: The conductive coating layer is slightly scraped. (Good durability)
Δ: Slight scraping or peeling of the conductive coating layer. (Durable)
X: The conductive coating layer has a lot of shaving and peeling, and a lot of the shavings adhere to the surface of the belt. (Poor durability).

[Antistatic]
Using a digital electrostatic potential measuring device “KSD-0103” manufactured by Kasuga Denki Co., Ltd., the electrostatic potential at a position of 10 cm from the dryer belt running at 400 m / min and 2 cm from the brush was measured and evaluated according to the following criteria. The measurement time was immediately after the start of running and 30 days later.
A: Less than 10 kV (very good antistatic property)
○: 10 kV or more and less than 30 kV (good antistatic property)
Δ: 30 kV or more and less than 50 kV (less antistatic)
X: 50 kV or more (anti-static property).

[Example 1]
47% by weight of PET resin (“T750M” manufactured by Toray Industries, Inc.), 22% by weight of high molecular weight saturated copolymerized polyester resin (“Chemit Q-1500” manufactured by Toray Industries, Inc.), olefin elastomer (“Idemitsu TPO (R110E) manufactured by Idemitsu Petrochemical Co., Ltd.) ) ") 20% by weight, carbon black (CB) (" Ketjen Black ^TM EC "manufactured by Ketjen Black International Co., Ltd.) 11% by weight, mixed with a diameter of 37 mm having a vent, L / D of 38.9, This was supplied to a biaxial kneading and extruding machine (Toshiba Machine Co., Ltd. “TEM35B”) rotated in the same direction and kneaded, extruded, cooled and cut to obtain a conductive PET resin composition (pellet). Subsequently, this resin composition was dried at 120 ° C. for 10 hours under reduced pressure of 6.7 × 10 ² Pa or less, and used as the conductive coating layer 2.

  On the other hand, a PET resin (“T750M” manufactured by Toray Industries, Inc.) was melt-extruded with a 40 mmφ extruder melt spinning machine, cooled and solidified with hot water at 70 ° C., and then stretched 5.0 times in a hot air bath at 180 ° C. A monofilament having an irregular cross section, an outer diameter of 500 μm, an inner diameter of 360 μm, and a strength of 3.0 cN / dtex was prepared and used as the core layer 1.

  A conductive synthetic resin monofilament having a diameter of 610 μm was prepared by melt-coating the conductive coating layer 2 on the core layer 1 using a horizontal molding apparatus “HT-65C” manufactured by Pla Giken. The physical property evaluation results are shown in Table 1.

  Moreover, the cross-sectional photograph of the sample after a bending abrasion test is shown in FIG. As is apparent from FIG. 1, a portion 3 of the conductive coating layer 2 scraped by the bending wear test was observed, but the core layer 1 was not exposed.

  Using the obtained conductive synthetic resin monofilament as an example of industrial fabric, a plain weave fabric (density: 20/20 (pieces / 2.54 cm)) is used as a part of the weft at a ratio of 1 out of 4 Table 1 shows the results of performance evaluation of the fabric.

[Example 2]
A conductive synthetic resin monofilament having a strength of 3.6 cN / dtex was produced in substantially the same manner as in Example 1 except that the thickness of the conductive coating layer was changed. A woven fabric was produced from the obtained conductive synthetic resin monofilament in substantially the same manner as in Example 1. These evaluation results are shown in Table 1.

[Example 3]
The coating layer 2 is made of 57% by weight of PET resin (“T750M” manufactured by Toray Industries, Inc.), 22% by weight of high-molecular-weight saturated copolymerized polyester resin (“Chemit Q-1500” manufactured by Toray Industries, Inc.), and olefin elastomer (manufactured by Idemitsu Petrochemical Co., Ltd.). Example 1 except that the composition was changed to a composition comprising 13% by weight of “Idemitsu TPO (R110E)” and 8% by weight of carbon black (CB) (“Ketjen Black ^™ EC” manufactured by Ketjen Black International). A conductive synthetic resin monofilament was produced in substantially the same manner as described above. A woven fabric was produced from the obtained conductive synthetic resin monofilament in substantially the same manner as in Example 1. These evaluation results are shown in Table 1.

[Example 4]
The coating layer 2 was made of 60% by weight of 6 nylon (N6) (“M1021T” manufactured by Toray Industries, Inc.), 20% by weight of olefin elastomer (“Idemitsu TPO (R110E)” manufactured by Idemitsu Petrochemical Co., Ltd.), carbon black (CB) (Ketjen) A conductive synthetic resin monofilament was produced in substantially the same manner as in Example 1 except that the composition was changed to a composition comprising 20% by weight of “Ketjen Black ^™ EC” manufactured by Black International. A woven fabric was produced from the obtained conductive synthetic resin monofilament in substantially the same manner as in Example 1. These evaluation results are shown in Table 1.

[Example 5]
PPS resin (“E2080” manufactured by Toray Industries, Inc.) was melt-extruded with a 40 mmφ extruder melt spinning machine, cooled and solidified with hot water at 85 ° C., and then 4.5 times in a steam bath at 101 ° C. and a hot air bath at 160 ° C. Stretched to produce a monofilament having a circular cross section and a diameter of 500 μm.

  A conductive synthetic resin monofilament was produced in substantially the same manner as in Example 1 except that the core layer 1 and the conductive coating layer 2 of Example 4 were used. A woven fabric was produced from the obtained conductive synthetic resin monofilament in substantially the same manner as in Example 1. These evaluation results are shown in Table 1.

[Example 6]
A multifilament of 1400 dtex 66 nylon (N66) ("M3001" manufactured by Toray Industries, Inc.) is twisted at 642 t / 127 cm, and then further twisted at 323 t / 127 cm to produce a twisted yarn having an equivalent diameter of 590 μm. This was used as the core layer 1.

  A conductive synthetic resin monofilament was produced in substantially the same manner as in Example 1 except that the core layer 1 and the conductive coating layer 2 of Example 4 were used. A woven fabric was produced from the obtained conductive synthetic resin monofilament in substantially the same manner as in Example 1. These evaluation results are shown in Table 1.

[Comparative Example 1]
The coating layer 2 is made of 67% by weight of PET resin (“T750M” manufactured by Toray Industries, Inc.), 22% by weight of high molecular weight saturated copolymerized polyester resin (“Chemit Q-1500” manufactured by Toray Industries, Inc.), carbon black (CB) (Ketjen Black) A conductive synthetic resin monofilament was produced in substantially the same manner as in Example 1 except that the composition was changed to 11% by weight (“Ketjen Black ^™ EC” manufactured by International Corporation). The physical property evaluation results are shown in Table 1.

  Moreover, the cross-sectional photograph of the sample after a bending abrasion test is shown in FIG. As is apparent from FIG. 2, the conductive coating layer 2 was found to have a portion 3 scraped by a bending wear test, and the core layer 1 was exposed from this portion 3.

  A woven fabric was produced from the obtained conductive synthetic resin monofilament in substantially the same manner as in Example 1. The performance evaluation results of this fabric are shown in Table 1.

[Comparative Example 2]
A conductive synthetic resin monofilament was produced in substantially the same manner as in Comparative Example 1 except that the thickness of the conductive coating layer was changed. A woven fabric was produced from the obtained conductive synthetic resin monofilament in substantially the same manner as in Example 1. These evaluation results are shown in Table 1.

[Comparative Example 3]
The coating layer 2 was changed to a composition composed of 80% by weight of 6 nylon (“M1021T” manufactured by Toray Industries, Inc.) and 20% by weight of carbon black (CB) (“Ketjen Black ^™ EC” manufactured by Ketjen Black International). Except for this, a conductive synthetic resin monofilament was produced in substantially the same manner as in Example 1. A woven fabric was produced from the obtained conductive synthetic resin monofilament in substantially the same manner as in Example 1. These evaluation results are shown in Table 1.

  Since the conductive synthetic resin filament of the present invention is an unprecedented functional filament that simultaneously satisfies both durability and conductivity, a powder sieving filter such as wheat flour, drying of a fabric, At least part of the warp and / or weft of industrial fabrics such as dryer belts and dryer canvas for paper machines to dry moisture and organic solvents when manufacturing sanitary products such as disposable diapers and sanitary products, hair brushes, industrial brushes, etc. Can be suitably used.

The cross-sectional photograph after the bending abrasion test of the conductive synthetic resin monofilament obtained in Example 1 is shown. The cross-sectional photograph after the bending abrasion test of the conductive synthetic resin monofilament obtained by the comparative example 1 is shown.

Explanation of symbols

1: Core layer 2: Conductive coating layer 3: Part removed by bending abrasion test

Claims (6)

A conductive synthetic resin filament comprising a core layer made of synthetic resin monofilament or multifilament and a conductive coating layer melt-coated on the surface of the core layer, wherein the conductive coating layer contains at least a thermoplastic elastomer. A conductive synthetic resin filament, wherein the core layer is not exposed after a bending wear test according to JIS L-1095-7.10.2B. The conductive synthetic resin filament according to claim 1, wherein the thermoplastic elastomer is an olefin elastomer. 3. The conductive synthetic resin filament according to claim 1, wherein the content of the thermoplastic elastomer is 5 to 50% by weight with respect to the entire conductive coating layer. The conductive synthetic resin filament according to any one of claims 1 to 3, wherein the volume resistivity value is less than 1000 Ω · cm. The conductive synthetic resin according to any one of claims 1 to 4, wherein the resin of the core layer and the resin other than the thermoplastic elastomer of the conductive coating layer are made of the same kind of polymer resin. filament. 6. The conductive synthetic resin filament according to claim 5, wherein the same kind of polymer resin is polyethylene terephthalate.

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