CN108796643B - Special material with permanent antistatic property and melt direct spinning property for conductive fibers - Google Patents

Special material with permanent antistatic property and melt direct spinning property for conductive fibers Download PDF

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CN108796643B
CN108796643B CN201810535514.5A CN201810535514A CN108796643B CN 108796643 B CN108796643 B CN 108796643B CN 201810535514 A CN201810535514 A CN 201810535514A CN 108796643 B CN108796643 B CN 108796643B
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CN108796643A (en
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吴中心
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Zhejiang Xinyuan Technology Co ltd
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    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F1/00—General methods for the manufacture of artificial filaments or the like
    • D01F1/02—Addition of substances to the spinning solution or to the melt
    • D01F1/09—Addition of substances to the spinning solution or to the melt for making electroconductive or anti-static filaments
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/28—Formation of filaments, threads, or the like while mixing different spinning solutions or melts during the spinning operation; Spinnerette packs therefor
    • D01D5/30—Conjugate filaments; Spinnerette packs therefor
    • D01D5/34—Core-skin structure; Spinnerette packs therefor
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
    • D01F8/04—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers
    • D01F8/12—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one polyamide as constituent
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
    • D01F8/04—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers
    • D01F8/14—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one polyester as constituent
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
    • D01F8/04—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers
    • D01F8/16—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one other macromolecular compound obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds as constituent

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Artificial Filaments (AREA)
  • Polyamides (AREA)

Abstract

The invention relates to the field of high polymer materials, and discloses a special material for conductive fibers which has permanent antistatic property and can be directly spun by melting, which comprises the following components: 50-75% of a polybasic nylon prepolymer with the molecular weight of 1500-2500, 35-50% of dibasic acid-terminated polyester polyol or dibasic acid-terminated polyether polyol, 1-5% of ethoxy lauryl tyramine, 1-3% of an ionic surfactant, 0.3-0.5% of lithium bis (oxalato) borate and 3-5% of water, wherein the molecular weights of the polyester polyol and the polyether polyol are 200-3000. The material of the invention is polyester, polyether and amide block polymer, can be directly melt and directly spun into conductive fiber, and can also be used as antistatic master batch to be added into nylon or PET for co-spinning to prepare antistatic fiber. The antistatic agent has the characteristics of permanent antistatic capability and no need of additionally adding an antistatic synergist.

Description

Special material with permanent antistatic property and melt direct spinning property for conductive fibers
Technical Field
The invention relates to the field of high polymer materials, in particular to a special material for conductive fibers, which has permanent antistatic property and can be directly spun by melting.
Background
At present, most of antistatic fibers are obtained by taking nylon or PET as a raw material, adding an antistatic agent for modification and then spinning.
Patent application No. CN03141992.5 discloses an antistatic polypropylene fiber, which is composed of a composite antistatic agent and polypropylene, and comprises the following components in percentage by weight: 0.2-0.8% of composite antistatic agent and 99.2-99.8% of polypropylene. The composite antistatic agent consists of an antistatic agent A, an antistatic agent B and an antistatic agent C.
Patent application No. CN201610418708.8 discloses a flame-retardant antistatic polyester fiber, comprising: the flame-retardant antistatic polyester fiber comprises a polyester fiber main body and a flame retardant and an antistatic agent which are added into the polyester fiber main body, wherein the content of the polyester fiber main body is 85-90%, the content of the flame retardant is 9-12%, the content of the antistatic agent is 1-3%, the flame retardant and the antistatic agent are added into the polyester fiber main body according to the formula, and then the flame retardant and the antistatic agent are prepared through a melt spinning method.
The patent with application number 201210148719.0 discloses a nylon elastomer material with permanent antistatic property and a preparation method thereof, wherein the nylon elastomer material comprises 50-90 parts by weight of nylon elastomer, 10-30 parts by weight of permanent antistatic agent and 0.3-2 parts by weight of processing aid. The manufacture thereofThe preparation method comprises the steps of adding the components into a high-speed mixer according to the proportion, uniformly mixing, feeding the mixture into a double-screw extruder, and carrying out mixing, extrusion, bracing, cooling and grain cutting to obtain the high-performance rubber belt. The flame-retardant permanent antistatic nylon elastomer material prepared by the invention has excellent impact property and surface resistance of 107-1010W。
Although the material prepared by the method has an antistatic effect, the manufacturing process is complex and is not easy to control; and the antistatic effect is not ideal due to the compatibility of the antistatic agent with the fiber matrix. Patent 201210148719.0 discloses at the end of its specification: required surface resistance of 109When W is above, the functionalization of the nylon elastomer can be realized by directly adding the permanent antistatic agent; required surface resistance of 109When the W is less than the W, the extrusion is unstable due to the direct addition of the permanent antistatic agent, and the problem can be effectively solved by adding the antistatic synergist into the system. Therefore, when the surface resistance is required to be low, the antistatic agent cannot be directly added, an antistatic synergist must be added at the same time to solve the processing problem, and the permanent antistatic nylon elastomer material can only be added into a fiber master batch as an additive and cannot be directly melted and directly spun. Therefore, there is a need to develop a conductive fiber special material which has a permanent antistatic effect and can be directly spun by melting.
Disclosure of Invention
In order to solve the technical problems, the invention provides a conductive fiber special material which has permanent antistatic property and can be directly melt and spun, wherein the material is a polyester/polyether and amide block polymer, can be directly melt and directly spun into conductive fibers, and can also be used as an antistatic master batch to be added into nylon or PET for co-spinning to prepare the antistatic fiber. The antistatic agent has the characteristics of permanent antistatic capability and no need of additionally adding an antistatic synergist.
The specific technical scheme of the invention is as follows: the special material for the conductive fiber with permanent antistatic property and melt direct spinning comprises the following components in percentage by mass:
50-75% of multi-component nylon prepolymer with molecular weight of 1500-2500,
35-50% of dibasic acid-terminated polyester polyol or dibasic acid-terminated polyether polyol, wherein the molecular weight of the polyester polyol or the polyether polyol is 200-3000,
1 to 5 percent of ethoxy lauryl tyramine,
1 to 3 percent of ionic surfactant,
0.3 to 0.5 percent of lithium bis (oxalato) borate,
3-5% of water.
The invention adopts the nylon elastomer with hydrophilic polyester or polyether and amide block prepared by special polymerization process, when the material is directly melt and directly spun or blended and spun with other PET, nylon and the like without antistatic performance, a special core-shell structure can be formed, and the hydrophilic conductive material is distributed on the surface of the fiber in a fine rib shape to form a conductive surface layer and take the conductive surface layer as a passage to leak charges. The surface resistance of the material was 107Omega/sq, volume resistance 107Ω.cm。
In the formula, diacid-terminated polyester polyol or diacid-terminated polyether polyol is used as a specific material with hydrophilic conductivity.
The ethoxy lauryl tyramine is a surfactant with reactivity, and active groups are directionally arranged after polymerization to form a stable and continuous electrostatic charge discharge channel.
The lithium bis (oxalato) borate has the effect of complexing with metal Li, so that the lithium bis (oxalato) borate has reaction activity and can react with groups on an elastomer chain to be uniformly dispersed in a nylon elastomer and assist in releasing static electricity. The preparation method of the lithium bis (oxalato) borate comprises the following steps: mixing lithium hydroxide, oxalic acid and boric acid with water as medium, reacting at 40-80 deg.C, evaporating, and crystallizing.
Preferably, the ionic surfactant is a sulfonate having an HLB value of 14 to 16.
Preferably, the sulfonate is sodium dodecyl benzene sulfonate or sodium dodecyl benzene sulfonate.
Preferably, the multielement nylon prepolymer comprises the following raw materials in percentage by mass:
15-35% of two or more of laurolactam, caprolactam, nylon 66 salt, nylon 610 salt and nylon 1010 salt,
one or more C12And 5-15% of the following dibasic acid,
one or more C12And 5-15% of diamine,
0.0 to 0.5 percent of antioxidant,
30-60% of water,
0.01-0.05% of catalyst.
Preferably, the diacid-terminated polyester polyol and the diacid-terminated polyether polyol respectively comprise the following raw materials in percentage by mass:
65-75% of polyether polyol or polyester polyol with the molecular weight of 200-3000,
C12and 5-20% of the following dibasic acid,
0.1 to 0.8 percent of catalyst,
15-25% of water.
Preferably, the catalyst is one or more of p-toluenesulfonic acid and orthophosphoric acid ester.
The invention firstly reacts polyether polyol or polyester polyol with molecular weight of 200-3000 with specific dibasic acid under specific conditions to prepare an active block with a reactive carboxylic acid end cap, and then the active block and a polynary nylon prepolymer are polymerized in a reaction kettle by a specific catalyst.
Preferably, the dibasic acid is one or more selected from adipic acid, suberic acid, sebacic acid, dodecanedioic acid and p-toluic acid.
Preferably, the diamine is selected from one or more of butanediamine, hexanediamine, octanediamine, decanediamine, dodecadiamine and p-phenylenediamine.
Preferably, the preparation method of the special material for the conductive fiber comprises the following steps: adding the materials into a polymerization kettle according to the proportion, and reacting for 15-25h at the temperature of 200-320 ℃ and under the pressure of 0.5-2MPa to prepare the material.
Preferably, the preparation method of the multielement nylon prepolymer comprises the following steps: adding the raw materials into a reaction kettle according to the proportion, firstly heating to 100-180 ℃, preserving heat for 3-5h, then heating to 200-350 ℃, controlling the stirring speed at 50-250rpm in the process, maintaining the pressure in the kettle at 1-2.5MPa, and after reacting for 5-7h, releasing the pressure to prepare the polynary nylon prepolymer.
Preferably, the preparation method of the diacid-terminated polyester polyol and the diacid-terminated polyether polyol comprises the following steps: adding the raw materials into a reaction kettle according to the proportion, heating to 150-260 ℃, and carrying out vacuum reaction for 4-8h under 780-820mmHg to obtain the target substance.
Compared with the prior art, the invention has the beneficial effects that: the material of the invention is polyester/polyether and amide block polymer, can be directly melt and directly spun into conductive fiber, and can also be used as antistatic master batch to be added into nylon or PET for co-spinning to prepare antistatic fiber. The antistatic agent has the characteristics of permanent antistatic capability and no need of additionally adding an antistatic synergist.
Detailed Description
The present invention will be further described with reference to the following examples.
General examples
The special material for the conductive fiber with permanent antistatic property and melt direct spinning comprises the following components in percentage by mass:
50-75% of multi-component nylon prepolymer with molecular weight of 1500-2500,
35-50% of dibasic acid-terminated polyester polyol or dibasic acid-terminated polyether polyol, wherein the molecular weight of the polyester polyol or the polyether polyol is 200-3000,
1 to 5 percent of ethoxy lauryl tyramine,
1-3% of ionic surfactant (sulfonate with HLB value of 14-16),
0.3 to 0.5 percent of lithium bis (oxalato) borate,
3-5% of water.
Optionally, the multi-element nylon prepolymer comprises the following raw materials in percentage by mass:
15-35% of two or more of laurolactam, caprolactam, nylon 66 salt, nylon 610 salt and nylon 1010 salt,
one or more C12And 5-15% of the following dibasic acid,
one or more C12And the following diamines5-15％，
0.0 to 0.5 percent of antioxidant,
30-60% of water,
0.01-0.05% of catalyst.
Optionally, the preparation method of lithium bis (oxalato) borate comprises the following steps: mixing lithium hydroxide, oxalic acid and boric acid with water as medium, reacting at 40-80 deg.C, evaporating, and crystallizing.
Optionally, the diacid-terminated polyester polyol or the diacid-terminated polyether polyol respectively comprises the following raw materials in percentage by mass:
65-75% of polyether polyol or polyester polyol with the molecular weight of 200-3000,
C12and 5-20% of the following dibasic acid,
0.1 to 0.8 percent of catalyst,
15-25% of water.
Optionally, the catalyst is one or more of p-toluenesulfonic acid and orthophosphoric acid ester.
Optionally, the dibasic acid is selected from one or more of adipic acid, suberic acid, sebacic acid, dodecanedioic acid and p-toluic acid.
Optionally, the diamine is selected from one or more of butanediamine, hexanediamine, octanediamine, decanediamine, dodecadiamine and p-phenylenediamine.
Optionally, the preparation method of the material special for the conductive fiber comprises the following steps: adding the materials into a polymerization kettle according to the proportion, and reacting for 15-25h at the temperature of 200-320 ℃ and under the pressure of 0.5-2MPa to prepare the material.
Optionally, the preparation method of the polynary nylon prepolymer comprises the following steps: adding the raw materials into a reaction kettle according to the proportion, firstly heating to 100-180 ℃, preserving heat for 3-5h, then heating to 200-350 ℃, controlling the stirring speed at 50-250rpm in the process, maintaining the pressure in the kettle at 1-2.5MPa, and after reacting for 5-7h, releasing the pressure to prepare the polynary nylon prepolymer.
Optionally, the diacid-terminated polyester polyol and the diacid-terminated polyether polyol are prepared by the following method: adding the raw materials into a reaction kettle according to the proportion, heating to 150-260 ℃, and carrying out vacuum reaction for 4-8h under 780-820mmHg to obtain the target substance.
Example 1
Preparing a special material for the conductive fiber:
100g of nylon 6/66 prepolymer with the molecular weight of 1500-2500,
85g of dibasic acid terminated polyether polyol,
2g of ethoxy lauryl tyramine, 2g,
2.6g of sodium dodecyl benzene sulfonate, 2.6g,
0.5g of lithium bis (oxalato) borate,
15g of deionized water.
Adding the materials into a reaction kettle, and reacting for 20 hours at 270 ℃ and at a stirring speed of 50rpm to prepare the special material for the cable sheath.
The preparation method of the lithium bis (oxalato) borate comprises the following steps: mixing lithium hydroxide, oxalic acid and boric acid with water as a medium, reacting at 60 ℃, and evaporating and crystallizing to obtain the lithium iron phosphate.
The multielement nylon prepolymer comprises the following raw materials in percentage by mass:
10 percent of nylon 66 salt, 20 percent of nylon 610 salt,
15 percent of the dodecanedioic acid,
15 percent of dodecadiamine,
0.2 percent of antioxidant,
0.02 percent of orthophosphoric acid ester,
the balance of water.
The preparation method of the multielement nylon prepolymer comprises the following steps: adding the raw materials into a reaction kettle according to the proportion, firstly heating to 140 ℃, preserving heat for 4h, then heating to 280 ℃, controlling the stirring speed at 150rpm in the process, maintaining the pressure in the kettle at 2MPa, and after reacting for 6h, releasing the pressure to prepare the polynary nylon prepolymer.
Preparation of diacid-capped polyether polyol:
120g of polyether polyol with the molecular weight of 200-3000,
30g of adipic acid (adipic acid),
0.2g of p-toluenesulfonic acid,
35g of water.
Adding the materials into a reactor, heating to 220 ℃, controlling the stirring speed at about 150rpm, reacting for 3 hours, and vacuumizing to 800mmHg for reacting for 4 hours.
Example 2
Preparing a special material for the conductive fiber:
100g of nylon 6/66 prepolymer with the molecular weight of 1500-2500,
85g of dibasic acid-terminated polyester polyol,
2g of ethoxy lauryl tyramine, 2g,
2.6g of sodium octadecyl benzene sulfonate, 2.6g,
0.5g of lithium bis (oxalato) borate,
15g of deionized water.
The preparation method of the lithium bis (oxalato) borate comprises the following steps: mixing lithium hydroxide, oxalic acid and boric acid with water as a medium, reacting at 40 ℃, and evaporating and crystallizing to obtain the lithium iron phosphate.
The multielement nylon prepolymer comprises the following raw materials in percentage by mass:
10 percent of nylon 66 salt, 25 percent of nylon 610 salt,
20 percent of p-methyl benzoic acid,
20 percent of p-phenylenediamine,
0.5 percent of antioxidant,
0.05 percent of orthophosphoric acid ester,
the balance of water.
The preparation method of the multielement nylon prepolymer comprises the following steps: adding the raw materials into a reaction kettle according to the proportion, firstly heating to 100 ℃, preserving heat for 5h, then heating to 200 ℃, controlling the stirring speed at 250rpm in the process, maintaining the pressure in the kettle at 2.5MPa, and after reacting for 5h, releasing the pressure to prepare the multielement nylon prepolymer.
Preparation of dibasic acid end capped polyester polyol:
120g of polyester polyol with the molecular weight of 200-3000,
50g of sebacic acid (sebacic acid),
0.2g of p-toluenesulfonic acid,
32g of water.
Adding the materials into a reactor, heating to 220 ℃, controlling the stirring speed at about 150rpm, reacting for 3 hours, and then vacuumizing to 800mmHg to react for 4 hours.
Example 3
Preparing a special material for the conductive fiber:
110g of nylon 6/66 prepolymer with the molecular weight of 1500-,
80g of dibasic acid-terminated polyether polyol,
2g of ethoxy lauryl tyramine, 2g,
2.6g of sodium octadecyl benzene sulfonate, 2.6g,
0.5g of lithium bis (oxalato) borate,
15g of deionized water.
The preparation method of the lithium bis (oxalato) borate comprises the following steps: mixing lithium hydroxide, oxalic acid and boric acid with water as a medium, reacting at 80 ℃, and evaporating and crystallizing to obtain the lithium iron phosphate.
The multielement nylon prepolymer comprises the following raw materials in percentage by mass:
20 percent of nylon 66 salt, 10 percent of nylon 610 salt,
5 percent of adipic acid, 5 percent of suberic acid,
5 percent of hexamethylene diamine, 5 percent of octanediamine,
0.1 percent of antioxidant,
0.02 percent of orthophosphoric acid ester,
the balance of water.
The preparation method of the multielement nylon prepolymer comprises the following steps: adding the raw materials into a reaction kettle according to the proportion, firstly heating to 180 ℃, preserving heat for 3 hours, then heating to 350 ℃, controlling the stirring speed at 50rpm in the process, maintaining the pressure in the kettle at 1MPa, and after reacting for 5 hours, releasing the pressure to prepare the polynary nylon prepolymer.
Preparation of diacid-capped polyether polyol:
preparing raw materials:
120g of polyether polyol with the molecular weight of 200-3000,
20g of adipic acid, 20g of which,
15g of sebacic acid (sebacic acid),
0.2g of p-toluenesulfonic acid,
50g of water.
Adding the materials into a reactor, heating to 220 ℃, controlling the stirring speed at about 150rpm, reacting for 3 hours, and then vacuumizing to 800mmHg to react for 4 hours.
Example 4
The present embodiment is different from embodiment 1 in that:
the formula of the special material for the conductive fiber is as follows:
100g of nylon 6/66 prepolymer with the molecular weight of 1500-2500,
85g of dibasic acid terminated polyether polyol,
2g of ethoxy lauryl tyramine, 2g,
2.6g of sodium dodecyl benzene sulfonate, 2.6g,
0.5g of lithium bis (oxalato) borate,
1g of modified nano sepiolite powder,
15g of deionized water.
The preparation method of the modified nano sepiolite powder comprises the following steps: adding nano sepiolite powder and octadecyl trimethyl ammonium bromide into water according to the mass ratio of 1: 0.5, uniformly stirring, grinding for 2 hours at the temperature of 60 ℃, and then centrifuging, filtering, washing and drying to obtain the nano sepiolite/octadecyl trimethyl ammonium bromide water-based paint.
The sepiolite is used as an inorganic material, and can effectively improve the strength and the wear resistance of the fiber. In addition, the sepiolite has rich nano pores and good hygroscopicity, and can improve the antistatic performance of the fiber. However, the sepiolite has a structure of a tightly stacked lamellar structure, and thus, the sepiolite has poor dispersibility and is easily agglomerated when added to a solvent. According to the invention, the sepiolite is modified by using octadecyl trimethyl ammonium bromide, the octadecyl trimethyl ammonium bromide can perform ion exchange with the sepiolite, and the octadecyl trimethyl ammonium bromide and the sepiolite penetrate into the interlayer of the sepiolite to prop apart the adjacent lamella, so that the distance between the lamellas is increased, and the dispersibility of the sepiolite is improved. In the subsequent polymerization process, the prepolymers and the monomers can enter into the sepiolite layers to form an organic-inorganic three-dimensional interpenetrating network, so that the lamella spacing of the sepiolite is further increased under the severe reaction, and the single-layer sepiolite can be fixed in the grids of the network structure to further improve the dispersibility of the sepiolite.
Example 5
10 kg of the raw materials prepared in the example 1 are dried for 4 hours under the vacuum of 105 ℃, added into an extruder, extruded by a spinneret plate under the control of the extrusion temperature (195 ℃, 220 ℃ and 245 ℃), cooled in air, drawn and shaped, and packaged to prepare the conductive fiber yarn 1.
Example 6
2.5 kg of the raw material prepared in example 1 and 7.5 kg of nylon 6 chips with a relative viscosity of 2.8 were uniformly mixed in a high-speed mixer, dried at 105 ℃ in vacuum for 4 hours, added into an extruder, extruded through a spinneret plate at controlled extrusion temperature (195 ℃, 220 ℃ and 245 ℃), cooled in air, drawn, shaped, and packaged to prepare the conductive fiber 2.
The test results of the products obtained in examples 5 to 6 above are as follows:
Figure GDA0002992579930000081
Figure GDA0002992579930000091
from the test results, the conductive fiber prepared by the special material has excellent performance, eliminates the complex process of blending and spinning, and has the advantages of environment-friendly manufacturing process and low production cost.
The raw materials and equipment used in the invention are common raw materials and equipment in the field if not specified; the methods used in the present invention are conventional in the art unless otherwise specified.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and all simple modifications, alterations and equivalents of the above embodiments according to the technical spirit of the present invention are still within the protection scope of the technical solution of the present invention.

Claims (5)

1. The special material for the conductive fiber with permanent antistatic property and melt direct spinning property is characterized by comprising the following raw materials in percentage by mass:
50-75% of multi-component nylon prepolymer with molecular weight of 1500-2500,
35-50% of dibasic acid-terminated polyester polyol or dibasic acid-terminated polyether polyol, wherein the molecular weight of the polyester polyol or the polyether polyol is 200-3000,
1 to 5 percent of ethoxy lauryl tyramine,
1 to 3 percent of ionic surfactant,
0.3 to 0.5 percent of lithium bis (oxalato) borate,
3-5% of water;
the total amount of the raw materials is 100 percent;
the preparation method of the special material for the conductive fiber comprises the following steps: adding the raw materials into a polymerization kettle according to the proportion, and reacting for 15-25h at the temperature of 200-320 ℃ and under the pressure of 0.5-2MPa to prepare the material;
the multielement nylon prepolymer comprises the following raw materials in percentage by mass:
15-35% of two or more of laurolactam, caprolactam, nylon 66 salt, nylon 610 salt and nylon 1010 salt,
one or more C12And 5-15% of the following dibasic acid,
one or more C12And 5-15% of diamine,
0.0 to 0.5 percent of antioxidant,
30-60% of water,
0.01 to 0.05 percent of catalyst; the preparation method of the multielement nylon prepolymer comprises the following steps: adding the raw materials into a reaction kettle according to the proportion, firstly heating to 100-180 ℃ and preserving heat for 3-5h, then heating to 200-350 ℃, controlling the stirring speed at 50-250rpm in the process, maintaining the pressure in the kettle at 1-2.5MPa, and after reacting for 5-7h, releasing the pressure to prepare the polynary nylon prepolymer;
the dibasic acid-terminated polyester polyol or dibasic acid-terminated polyether polyol respectively comprises the following raw materials in percentage by mass:
65-75% of polyether polyol or polyester polyol with the molecular weight of 200-3000,
C12and 5-20% of the following dibasic acid,
0.1 to 0.8 percent of catalyst,
15-25% of water;
the preparation method of the dibasic acid-terminated polyester polyol or dibasic acid-terminated polyether polyol comprises the following steps: adding the raw materials into a reaction kettle according to the proportion, heating to 150-260 ℃, and carrying out vacuum reaction for 4-8h under 780-820mmHg to obtain the target substance.
2. The special material for conductive fiber with permanent antistatic property and direct-spinning melt property as claimed in claim 1, wherein: the preparation method of the lithium bis (oxalato) borate comprises the following steps: mixing lithium hydroxide, oxalic acid and boric acid by taking water as a medium, reacting at 40-80 ℃, and evaporating and crystallizing to obtain the lithium iron phosphate; the ionic surfactant is sulfonate with HLB value of 14-16.
3. The special material for the conductive fiber with permanent antistatic property and direct melt spinning property as claimed in claim 1, wherein the catalyst is one or more of p-toluenesulfonic acid and orthophosphoric acid ester.
4. The special material for conductive fiber with permanent antistatic property and direct melt spinning property as claimed in claim 1, wherein said dibasic acid is selected from one or more of adipic acid, suberic acid, sebacic acid and dodecanedioic acid.
5. The special material for conductive fiber with permanent antistatic property and direct melt spinning property as claimed in claim 1, wherein the diamine is selected from one or more of butanediamine, hexanediamine, octanediamine, decanediamine, dodecadiamine and p-phenylenediamine.
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Denomination of invention: A conductive fiber special material with permanent antistatic property and meltable direct spinning

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