JP2009299205A - Acrylic synthetic fiber and method for producing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a white acrylic synthetic fiber having excellent conductivity without impairing operability and processability during production of acrylic synthetic fiber. <P>SOLUTION: The acrylic synthetic fiber has a fiber surface in which a white conductive material-containing polyalkylene glycol-based polymer forms an island component in the fiber axis direction in a streak state and in a network structure in a sea component of an acrylic polymer and comprises 10 wt.%-35 wt.% of the white conductive material based on the fiber weight. The method for producing a conductive acrylic synthetic fiber includes subjecting an acrylic polymer and a white conductive material-containing polyalkylene glycol-based polymer to blend spinning. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an acrylic synthetic fiber excellent in electrical conductivity and a method for producing the same, and more specifically, is a basic characteristic of the fiber while maintaining good dyeability and texture, which are characteristics of the acrylic fiber. The present invention relates to an acrylic synthetic fiber that retains the strength and elongation of a single fiber and has excellent conductive performance, and a method for producing the same.

  Conventionally, methods for producing conductive acrylic synthetic fibers include a method of plating or coating a conductive material on the fiber surface (see Patent Document 1 and Patent Document 4), and a method of kneading a conductive material into a fiber (patent) There is known a method of compound spinning by joining three or more layers of conductive materials in the fiber axis direction (see Patent Document 5).

  In the methods proposed in Patent Document 1 and Patent Document 4, since the conductive material covers the fiber surface, the processability such as dyeability and spinnability is deteriorated, and it is liable to fall off due to friction and the like. However, in the methods proposed in Patent Document 2 and Patent Document 5, since the conductive substance is present inside the fiber, there is little concern that the durability and workability are greatly deteriorated.

On the other hand, carbon black is most often used as a conductive material. However, since it is black, the fiber becomes black although there is a difference depending on the amount and method of addition. Therefore, it was difficult to use for apparel applications where design is important, especially for outerwear.
In addition, some white metal compounds are used as a conductive material and are kneaded and mixed uniformly throughout the fiber. However, in order to obtain high conductivity, it is necessary to knead and mix a large amount, and the fiber physical properties such as strength are reduced. There is a problem.

  In order to prevent such a decrease in strength, a technique has been proposed in which a white conductive material is present only in the core portion of the core-sheath structure fiber (Patent Document 3).

  However, in this case, since a precise base such as a core-sheath base is used, the conductive material is likely to be clogged in the base, resulting in inferior operability, and a portion containing conductive fine particles is covered with an acrylic polymer. Therefore, there is a problem that it is inferior in conductivity (staticity removal).

  In addition, the method of making the conductive fine particles into a multilayer composite structure in the fiber axis direction as in Patent Document 5 tends to cause spots in the multilayer composite structure of the conductive fine particles in the fiber, resulting in a decrease in strength, a decrease in conductivity, etc. There are concerns.

JP 2001-40578 A JP 2002-138323 A JP-A-8-337925 JP 58-31168 A JP 2007-119992 A

  The present invention solves the problems of the prior art, i.e., acrylic synthetic fibers that are white and have excellent conductivity without impairing operability and processability during the production of acrylic synthetic fibers. It aims at providing the manufacturing method.

  In order to solve the above problems, the acrylic synthetic fiber of the present invention has the following configuration (1).

(1) On the fiber surface, a polyalkylene glycol polymer containing a white conductive material forms an island component in a streak-like and network structure along the fiber axis direction on the sea component of the acrylic polymer. An acrylic synthetic fiber, wherein the white conductive material is contained in an amount of 10% by weight to 35% by weight per fiber weight.

  In addition, the acrylic synthetic fiber of the present invention preferably has any one of the configurations (2) to (6) as a more specific configuration.

(2) The acrylic synthetic fiber according to the above (1), wherein the white conductive material has an amine on its surface.

(3) The above-mentioned (1) or the above-mentioned (1), wherein the white conductive material is obtained by making a white metal oxide conductive and adding an amine to the surface of the conductive white metal oxide. (2) The acrylic synthetic fiber as described.

(4) The acrylic synthetic fiber according to (3) above, wherein the white metal oxide is at least one selected from the group consisting of titanium oxide, tin oxide, zinc oxide, indium oxide and antimony oxide.

(5) The acrylic synthetic fiber according to the above (3), wherein the amines are provided using a coupling agent having an amino group as a surface treatment agent.

(6) The acrylic synthetic fiber according to the above (3), wherein the white metal oxide is a fine particle metal oxide in an amount of 20% by weight or more of the crystal forming the white metal oxide.

  Moreover, the manufacturing method of the acrylic synthetic fiber of this invention which achieves the objective mentioned above has the structure of the following (7).

(7) Mixing and spinning an acrylic polymer and a polyalkylene glycol polymer containing a white conductive material to obtain the conductive acrylic synthetic fiber according to any one of (1) to (6). It is the manufacturing method of the conductive acrylic synthetic fiber characterized.

  The acrylic synthetic fiber of the present invention is an acrylic polymer in which the white conductive material is continuously joined and disposed along the polyalkylene glycol polymer, and the island component containing the white conductive material is a nonconductor. Since it has an uncovered portion, the amount of white conductive material used is suppressed, and excellent conductivity that is unprecedented is exhibited, and its durability and workability are excellent.

  Moreover, according to the manufacturing method of the acrylic synthetic fiber of this invention, this acrylic synthetic fiber can be manufactured stably, without impairing operativity.

  Hereinafter, the acrylic synthetic fiber having excellent conductivity of the present invention and a method for producing the same will be described in more detail.

  The acrylic polymer used in the present invention is an acrylic polymer obtained by polymerizing 30% by weight or more of acrylonitrile (hereinafter referred to as AN) as a monomer, and may have fiber forming ability. Non-AN monomers include vinyl sulfonic acid in addition to vinyl compounds such as acrylic acid, methacrylic acid and their alkyl esters, itacones, acrylamide, methacrylamide, vinyl acetate, vinyl chloride, styrene, vinylidene chloride , Unsaturated sulfonic acids such as acrylic sulfonic acid, methacryl sulfonic acid, and parastyrene sulfonic acid, and salts thereof can be used.

  Examples of the polyalkylene glycol polymer used in the present invention include high molecular weight polyethylene glycol of 20,000 to 500,000, and polypropylene glycol and esters and derivatives thereof such as polyethylene adipate, polyethylene azelate, polyethylene sebacate, and polyethylene isoform. Examples thereof include polyesters such as phthalate, polybutylene adipate, and polybutylene azelate, and block polyester copolymers of these copolymerized polyesters and polyethylene glycol or polypropylene glycol. The polyalkylene glycol polymer used in the examples is a copolymer obtained by graft polymerization of a block polyester ether copolymer, acrylonitrile and a copolymer component containing one or more other copolymer components.

  The acrylic synthetic fiber of the present invention has an island-like structure in which a polyalkylene glycol polymer containing a white conductive material is streaked along the fiber axis direction and has a mesh structure on the surface of the fiber. It is what forms the component. That is, in the acrylic copolymer extending in the longitudinal direction of the fiber, the white conductive material is included in the polyalkylene glycol polymer along the longitudinal direction of the fiber in a streak-like and network structure Arranged in a shape.

  FIG. 1 shows a schematic diagram of a fiber side surface showing one embodiment of the acrylic synthetic fiber of the present invention.

  The acrylic compatible fiber of the present invention has a network structure in which the polyalkylene glycol polymer 11 containing a white conductive material is streaked in the fiber axis direction in the sea component of the acrylic polymer 12 on the fiber surface. In the form of an island component.

  In the present invention, “in a streak shape along the fiber axis direction” means a state of being elongated and continuous along the fiber axis direction and including a white conductive material on the side surface of the fiber surface. This means that coalescence exists. Further, “in a network structure” means that a polyalkylene glycol polymer containing a white conductive material is present on the side surface of the fiber in the form of a mesh pattern. And, “islets are formed in a streak and mesh structure” means that the island components are formed in the sea component in the state of the mesh pattern in a continuous manner along the fiber axis direction. It means that there is a polyalkylene glycol polymer containing a white conductive material on the side surface of the fiber surface. The acrylic synthetic fiber according to the present invention is an island-like structure in which the polyalkylene glycol-based polymer containing a white conductive material is streaked along the fiber axis direction and has a network structure on the surface of the fiber. Since the components are formed, the conductive material is difficult to drop off, and the conductive material is continuously joined in the fiber axis direction, so that it has excellent conductivity.

  Moreover, since the island component is exposed on the fiber surface, the conductivity can be enhanced without being insulated by the acrylic polymer which is a nonconductor. When the conductive material is covered with an acrylic polymer, the white conductive material is not included in the acrylic polymer because it does not cause a crosslinking reaction with the amine on the surface of the white conductive material, but the polyalkylene glycol polymer is covered. As a result, a cross-linking reaction with the amine on the surface of the white conductive material occurs, the white conductive material is included in the polyalkylene glycol polymer, and the white conductive material is continuously bonded into the fiber, resulting in excellent conductivity. Is obtained.

  In the present invention, the white conductive material needs to be contained in an amount of 10% to 35% by weight per fiber weight. If the content of the white conductive material is too small, such as less than 10% by weight, the conductivity will be insufficient, and if it is too much, if over 35% by weight, the fiber properties will be impaired, which is not preferable.

  In the present invention, the weight ratio between the polyalkylene glycol polymer containing the white conductive material and the acrylic polymer is 30 wt% to 40 wt% for the former and 70 wt% to 60 wt% for the latter. It is good to do. If the content of the polyalkylene glycol-based polymer containing a white conductive material is too small, such as less than 30% by weight, the conductive material tends to drop off, which is not preferable. On the other hand, if it is more than 70% by weight, the physical properties of the fiber are often impaired.

  The white conductive material preferably has an amine on its surface. The presence of amine on the surface of the white conductive material causes a crosslinking reaction between the ester compound in the polyalkylene glycol polymer and the amine, and the white conductive agent is included in the polyalkylene glycol polymer.

  As the white conductive material, a material obtained by making a white metal oxide conductive and treating the surface with an amine surface treatment agent to give amines is preferably used. Examples of the white metal oxide include titanium oxide, tin oxide, zinc oxide, indium oxide, and antimony oxide, and one or more of these can be used as appropriate.

  Specifically, the semiconductor is made conductive by doping with a different element, or the white metal oxide is coated with the semiconductor. As the surface treatment agent for amines, a coupling agent having an amino group is usually used. Specifically, as a coupling agent having an amino group, γ- (2-aminoethyl) aminopropyltrimethoxysilane is used. , Γ-aminopropyltriethoxysilane, isopropyltri (N-aminoethyl-aminoethyl) titanate, and the like.

  As for the white metal oxide, it is preferable that 20% by weight or more of the crystal forming the white metal oxide is a fine particle metal oxide. Thereby, the effect of making the white metal oxide conductive is produced.

  The white conductive material is generally used as a dispersion of a white conductive material dispersed in the same solvent as that used in the spinning solution described later.

  The white conductive material dispersion and the polyalkylene glycol polymer are mixed and stirred and mixed in a container using, for example, a homomixer or a propeller stirrer. After stirring and mixing, the uniformly dispersed liquid is preferably treated with a sand grinder (bead mill) so that the polyalkylene glycol polymer contains a white conductive material.

  Next, a method for obtaining the above-described acrylic synthetic fiber of the present invention will be described.

  The acrylic synthetic fiber of the present invention can be produced by mixing and spinning the above-described acrylic polymer and the polyalkylene glycol-based polymer containing the above-described white conductive material.

  The acrylic polymer to be used may be produced by any method such as suspension polymerization, solution polymerization, and emulsion polymerization. The acrylic polymer and the polyalkylene glycol polymer containing the white conductive material are each prepared as a solution dissolved in a solvent, but the solvent to be used may be any one that dissolves the acrylic polymer. Inorganic solvents such as organic solvents such as dimethyl sulfoxide (hereinafter referred to as DMSO), dimethylacetamide, dimethylformamide, and acetone, and aqueous inorganic salt solutions such as nitric acid, sodium rhodanate, and zinc chloride are preferably used. A first spinning solution in which a polyalkylene glycol polymer containing a white conductive material is dissolved in a solvent and a second spinning solution in which an acrylic polymer is dissolved in a solvent are prepared. The polymer concentration in the spinning solution is set to 10 to 30% by weight.

  In these spinning solutions, additives such as ultraviolet absorbers, dyes, and pigments may be incorporated within a range that does not impair fiber forming ability and operability.

  In the present invention, the second spinning solution usually does not contain a white conductive material. The concentration of the white conductive material in the first spinning solution is 10% by weight or more, preferably 15 to 25% by weight, although it depends on the conductivity of the white conductive material to be used, the required conductivity and the spinning conditions. Preferably it is 20 to 30 weight%. When the concentration is less than 10% by weight, high conductivity is often not obtained in the obtained fiber. The more white conductive material, the higher the conductivity can be given to the obtained fiber, but on the other hand, the operability is often deteriorated, such as the pressure of the base is easily increased, and the fiber strength is often lowered.

  A method of mixing and spinning the first spinning solution and the second spinning solution will be described with reference to FIG.

  FIG. 2 is a schematic plan view showing one embodiment of a mixing and spinning apparatus for producing the fiber of the present invention.

  The first spinning solution 1 and the second spinning solution 2 are respectively supplied to the mixing element 3 after passing through a filtration unit (not shown), and passed through a six-stage mixer in the mixing element. The spinning solution is kneaded to such an extent that it is not completely uniformly mixed. In other words, the first spinning solution 1 is kneaded by the mixing element 3 until a straight and network island is formed in the sea of the second spinning solution 2. After being kneaded as described above by the mixing element 3, it enters the die unit 4, flows out from the spinning hole 5, and is discharged as a filament group to the coagulation bath.

  As the mixing element 3, for example, a 6-stage mixer in the element of “High Mixer” (registered trademark) manufactured by Toray Engineering Co., Ltd. is preferably used.

  As the cross-sectional shape of the fiber, an arbitrary shape such as a round cross-section, a triangular cross-section, a C-shaped cross-section, or a flat cross-section can be selected depending on the shape of the spinning hole.

  As a coagulation method, it is important that the coagulation bath has a high coagulation rate, and it is preferable to use an organic solvent such as dimethylformamide, dimethylacetamide, or DMSO, which has a coagulation rate faster than that of an inorganic solvent, mixed with water.

  Among them, DMSO having a high solidification rate is preferably used. The composition of the coagulation bath is preferably 10 to 70% by weight of organic solvent / 90 to 30% by weight of water, more preferably 30 to 60% by weight of organic solvent / 70 to 40% by weight of water.

  Furthermore, the coagulation bath temperature is preferably maintained in the range of 5 to 60 ° C, more preferably 20 to 45 ° C. If the coagulation bath temperature is lower than 5 ° C., the spinnability, particularly the spinnability, tends to be lowered, and if the coagulation bath temperature is higher than 60 ° C., devitrification occurs in the resulting fiber, and the dyeability tends to be lowered.

  The coagulated yarn derived from the coagulation bath is subjected to a water washing treatment, a water washing simultaneously with a drawing treatment, a water washing treatment after drawing, a water washing treatment after drawing, or a water drawing treatment, and then, if necessary, provision of a primary oil, After the secondary oil is applied, mechanical crimps are applied, dried with hot air at 60 to 95 ° C., and then cut into a predetermined length to obtain the acrylic synthetic fiber of the present invention as a short fiber aggregate. be able to.

  Hereinafter, the present invention will be described more specifically with reference to examples. In the present invention, various characteristics are measured as follows.

1. Laundry treatment A washing agent of 0.2% by weight of neutral detergent ("Zab" (registered trademark): manufactured by Kao Corporation) is charged into a household washing machine (NAW-305: manufactured by Matsushita Electric Industrial Co., Ltd.) The temperature is 40 ° C ± 2 ° C, the bath ratio of the fiber bundle or woven / knitted fabric and the washing liquid is 1:50, and washing is performed by strong inversion for 5 minutes. This is one wash, and after 5 washes, it is dried.

2. Electric resistance / electric specific resistance Using a fiber assembly to be measured, a fiber bundle having a total fineness of 1100 dtex and a length of 10 cm is obtained. About the obtained fiber bundle, before and after the washing process described above, both ends of the fiber bundle are clamped in an atmosphere of 60% RH and 25 ° C., and an electric resistance R is measured by applying an applied voltage of 100V.
Next, the electrical resistivity ρ is obtained from the electrical resistance R by the following formula. When the electrical resistivity was 10 ⁸ Ω · cm or less, it was considered to be conductive.
ρ = (R × D) / (10 × L × SG) × 10 ⁻⁵ (Ω · cm)
In the above formula, R: electrical resistance value (Ω), D: total fineness (dtex), L: sample length (cm),
SG: Specific gravity of fiber

3. Friction band voltage of woven or knitted fabric JIS-L1094 (revised in 1997), 5.2 Friction band voltage is measured by the friction band voltage measurement method.

4). Observation of fiber surface state The surface of a single fiber was observed with a scanning electron microscope at a magnification of 1000 times.

Example 1
As the white conductive material and polyalkylene glycol polymer, those obtained as follows are used so that the concentration of the white conductive material is 40% by weight and the concentration of the polyalkylene glycol polymer is 60% by weight. A first spinning solution dissolved in DMSO was obtained.
As the white conductive material, a material obtained by making a white metal oxide conductive and adding a surface treatment agent of amines to the surface thereof is preferably used. Examples of the white metal oxide include titanium oxide, tin oxide, zinc oxide, indium oxide, and antimony oxide.
Specific examples of the coupling agent having an amino group using this white metal oxide include γ- (2-aminoethyl) aminopropyltrimethoxysilane, γ-aminopropyltriethoxysilane, isopropyltri ( N-aminoethyl-aminoethyl) titanate is used to make it semiconductive by doping different elements, or to coat white metal oxide with the semiconducting material, making it conductive and amine present on the surface A white conductive material was obtained. In the white metal oxide used, the size of the crystal is such that the fine particle metal oxide has a particle size of 0.03 μm to 0.06 μm, the acicular metal oxide has a major axis length of 1.7 μm to 5.2 μm, and a minor axis. It has a length of 0.13 μm to 0.27 μm, and is made of a white metal oxide in which 75% by weight of fine particle metal oxide and 25% by weight of acicular metal oxide are mixed.
A polyalkylene glycol polymer was obtained by subjecting polyethylene glycol to condensation polymerization to 40% by weight of ethylene glycol, 40% by weight of azelaic acid, and 20% by weight of adipic acid to obtain a block polyester copolymer. This block polyester copolymer is dissolved in a DMSO solvent so as to be 30% by weight, and then grafted with 9.7% by weight of AN and 2.3% by weight of methyl methacrylate using ammonium persulfate as a catalyst to obtain a polyalkylene glycol polymer. It was.
On the other hand, an acrylic polymer obtained by polymerizing AN 94 mol%, methyl acrylate 5.5 mol%, and methacrylic sulfonic acid soda 0.5 mol% is dissolved in DMSO to a polymer concentration of 25 wt%. A spinning solution of 2 was obtained.
The first spinning solution and the second spinning solution are adjusted in supply amount so that the white conductive material is 12% by weight with respect to the total weight of both, manufactured by Toray Engineering Co., Ltd. As shown in FIG. 2, it was fed to a “high mixer”, mixed using 6-stage elements, discharged into the coagulation bath from the spinning hole in the die unit, and coagulated to obtain a coagulated yarn. The coagulation bath was an aqueous solution having a DMSO concentration of 55% by weight and a temperature of 35 ° C. The spinning hole in the die unit was a round shape having a hole diameter of 0.055 mmφ. The coagulated yarn was stretched 5.5 times in hot water at 98 ° C., and the drawn yarn was sufficiently washed with warm water, and then dried and densified at 160 ° C. Next, the yarn was preheated at 75 ° C., mechanically crimped, and dried with hot air at 80 ° C. to obtain a fiber assembly having a single yarn fineness of 2.2 dtex.
When single fibers were collected from the obtained fiber assembly and the fiber surface state was observed, the white conductive material was arranged in a streaky and network structure on the fiber surface.
In addition, Table 1 shows the results of measuring electrical resistance and electrical resistivity using the obtained fiber assembly. The obtained fiber assembly had excellent conductivity.
Next, the obtained fiber assembly was cut into a length of 51 mm to obtain a short fiber assembly. The obtained short fiber aggregate and normal acrylic short fiber aggregate (short fiber length 51 mm cut product) are blended at a weight ratio of 5:95, and card, kneading and roving are performed by a conventional method. In the process, a twist of 360 turns / m was applied in the Z direction to form a 1 / 36th spun yarn, and the spun yarn was knitted into a tense structure to obtain a knitted fabric. When the obtained knitted fabric was subjected to a chargeability test, as shown in Table 2, it had an excellent frictional voltage.

Example 2
Except that the supply amounts of the first spinning solution and the second spinning solution supplied to the mixing element were changed to 18% by weight of the white conductive material with respect to the total weight of both, the same as in Example 1. Thus, a fiber assembly, a short fiber assembly and a knitted fabric were obtained. When single fibers were collected from the obtained fiber assembly and the fiber surface state was observed, the white conductive material was arranged in a streaky and network structure on the fiber surface.
In addition, Table 1 shows the results of measuring electrical resistance and electrical resistivity using the obtained fiber assembly. The obtained fiber assembly had excellent conductivity. Furthermore, when the obtained knitted fabric was subjected to a chargeability test, as shown in Table 1, it had an excellent frictional voltage.

Example 3
Except that the supply amounts of the first spinning solution and the second spinning solution supplied to the mixing element were changed so that the white conductive material was 22% by weight with respect to the total weight of both, the same as in Example 1. Thus, a fiber assembly, a short fiber assembly and a knitted fabric were obtained. When single fibers were collected from the obtained fiber assembly and the fiber surface state was observed, the white conductive material was arranged in a streaky and network structure on the fiber surface.
In addition, Table 1 shows the results of measuring electrical resistance and electrical resistivity using the obtained fiber assembly. The obtained fiber assembly had excellent conductivity. Furthermore, when the obtained knitted fabric was subjected to a chargeability test, as shown in Table 1, it had excellent friction withstand voltage.

Comparative Example 1
A fiber assembly, a short fiber assembly, and a knitted fabric were obtained in the same manner as in Example 1 except that the first spinning solution was not used and the mixing element was not used. Since single fibers were collected from the obtained fiber assembly and the first spinning solution was not used, the operability was good.
The results of measuring the electrical resistance and electrical resistivity using the obtained fiber assembly are shown in Table 1, and the results of conducting a chargeability test on the obtained knitted fabric are shown in Table 1. The obtained fiber was satisfactory in physical properties such as strength and elongation, but was not satisfactory because of its considerably low conductivity and frictional voltage.

Comparative Example 2
Except that the supply amounts of the first spinning solution and the second spinning solution supplied to the mixing element were changed to 1% by weight of the white conductive material with respect to the total weight of both, the same as in Example 1. Thus, a fiber assembly, a short fiber assembly and a knitted fabric were obtained. When single fibers were collected from the obtained fiber assembly and the fiber surface state was observed, the white conductive material was arranged in a streaky and network structure on the fiber surface.
In addition, Table 1 shows the results of measuring electrical resistance and electrical resistivity using the obtained fiber assembly. The obtained fiber assembly was not satisfactory because of its low electrical conductivity. Furthermore, when the obtained knitted fabric was subjected to a chargeability test, as shown in Table 1, the frictional voltage was low and was not satisfactory.

Comparative Example 3
Except that the supply amounts of the first spinning solution and the second spinning solution supplied to the mixing element were changed so that the white conductive material was 5% by weight with respect to the total weight of both, the same as in Example 1. Thus, a fiber assembly, a short fiber assembly and a knitted fabric were obtained. When single fibers were collected from the obtained fiber assembly and the fiber surface state was observed, the white conductive material was arranged in a streaky and network structure on the fiber surface.
In addition, Table 1 shows the results of measuring electrical resistance and electrical resistivity using the obtained fiber assembly. The obtained fiber assembly was not satisfactory because of its low electrical conductivity. Furthermore, when the obtained knitted fabric was subjected to a chargeability test, as shown in Table 1, the frictional voltage was low and was not satisfactory.

Comparative Example 4
Except that the supply amounts of the first spinning solution and the second spinning solution supplied to the mixing element were changed to 40% by weight of the white conductive material with respect to the total weight of both, the same as in Example 1. Thus, a fiber assembly and a short fiber assembly were obtained. Since the amount of the white conductive material added is too large, the pressure increase in the base is large, and frequent base replacement is necessary. When single fibers were collected from the obtained fiber assembly and the fiber surface state was observed, the white conductive material was arranged in a streaky and network structure on the fiber surface. In addition, Table 1 shows the results of measuring electrical resistance and electrical resistivity using the obtained fiber assembly. Although the obtained fiber assembly was satisfactory in electrical conductivity, a knitted fabric could not be produced due to poor physical properties such as strength and elongation.

FIG. 1 is a schematic view of a fiber side surface showing one embodiment of the acrylic synthetic fiber of the present invention. FIG. 2 is a schematic view of a mixed spinning apparatus that is preferably used for producing the acrylic synthetic fiber of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 1st spinning solution 2 2nd spinning solution 3 Mixing element 4 Cap unit 5 Spinning hole 11 Polyalkylene glycol polymer containing white conductive material 12 Acrylic polymer

Claims (7)

  Acrylic synthetic composition in which polyalkylene glycol-based polymer containing white conductive material forms island components in a streak-like and network structure along the fiber axis direction on the surface of the fiber. An acrylic synthetic fiber, wherein the white conductive material is contained in an amount of 10% to 35% by weight per fiber weight.   The acrylic synthetic fiber according to claim 1, wherein the white conductive material has an amine on its surface.   3. The acrylic according to claim 1 or 2, wherein the white conductive material is obtained by making a white metal oxide conductive and adding amines to the surface of the conductive white metal oxide. Synthetic fiber.   The acrylic synthetic fiber according to claim 3, wherein the white metal oxide is at least one selected from the group consisting of titanium oxide, tin oxide, zinc oxide, indium oxide and antimony oxide.   The acrylic synthetic fiber according to claim 3, wherein the amine is provided by using a coupling agent having an amino group as a surface treatment agent.   4. The acrylic synthetic fiber according to claim 3, wherein the white metal oxide is a fine particle metal oxide in an amount of 20% by weight or more of the crystal forming the white metal oxide.   The acrylic synthetic fiber according to any one of claims 1 to 6, wherein the acrylic synthetic fiber and the polyalkylene glycol polymer containing a white conductive material are mixed and spun to produce conductivity. A method for producing a conductive acrylic synthetic fiber.

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