CN104963018B - Magnetic field induction auxiliary spinning forming device for conductive/magnetic conductive chemical fiber and production method thereof - Google Patents

Abstract

The invention discloses a magnetic field induction auxiliary spinning forming device of conductive/magnetic conductive chemical fibers and a production method thereof, which are characterized in that an electromagnetic coil (3) is vertically connected with a spinneret plate (2), the spinneret plate (2) is connected with a melt flow passage (1), the hollow part of the electromagnetic coil (3) is aligned to the center of the spinneret plate, so that strand silk (5) smoothly passes through the hollow part of the electromagnetic coil, and the coil is connected with a direct current power supply during spinning to generate magnetic lines of force (4); and then the magnetic powder, the dispersant, the antioxidant and the polymer are melted and blended, the mixed melt is extruded out from a spinneret orifice through a metering pump, under the action of a magnetic field of an electromagnetic coil, magnetic particles are arranged in the direction of magnetic lines of force to form a microfiber or a bead structure, strands are cooled and solidified, and then the finished product of the conductive/magnetic composite fiber is obtained through oiling, bundling, drafting and heat setting.

Description

Magnetic field induction assisted spinning forming device and its production of conductive/magnetic conductive chemical fiber method

technical field

The invention relates to a magnetic field-induced auxiliary spinning forming device for conductive/magnetic conductive chemical fibers and a production method thereof, belonging to the technical field of functional fiber production.

Background technique

With the continuous development of modern industry and electronic consumer industry, the hazards of static electricity and electromagnetic radiation are constantly emerging. Due to the improvement of industrial processing speed, the accidents caused by static electricity are increasing day by day. Due to the phenomenon of static electricity, chemical fiber not only makes spinning and weaving difficult, but also has poor wearing comfort. It can also cause electric shock and even cause serious disasters. Static electricity is one of the main factors causing fires, explosions and other accidents in industries such as pyrotechnics, chemicals, oil, and crushing processing. It is also one of the main factors that cause potential failure of sensitive electronic components and reduce the reliability of electronic products. In terms of electromagnetic radiation, the development of modern high-tech and the widespread use of electronic and electrical products have made electromagnetic radiation pollution the fourth largest public hazard after air pollution, water pollution, and noise pollution. According to incomplete statistics, long-term exposure to the electromagnetic radiation pollution environment will cause people to have adverse symptoms such as fatigue, memory loss, and physiological function decline. Preventing electromagnetic wave radiation pollution to protect the environment and human health, and preventing electromagnetic wave leakage to ensure information security have become urgent international issues. Therefore, it is of great practical significance to prepare conductive polypropylene fibers with antistatic and electromagnetic shielding functions.

Conductive fiber refers to the fiber whose volume specific resistivity is lower than 10 ⁸ Ω·cm under standard conditions (20°C, relative humidity 65%). Its conductive properties make the processed fabric have both antistatic and electromagnetic shielding functions. The common preparation methods of polymer-based conductive/magnetic fibers include post-finishing method and conductive powder/polymer blend spinning method. Chinese _{patent CN103590250 A} discloses a method for preparing a magnetic functional coated fabric by applying a magnetic material to an ordinary textile fabric after finishing _. The disadvantage is that Fe ₃ O ₄ particles are coated with conductive polypyrrole (PPY), and the obtained PPY/Fe ₃ O ₄ coated textile fabric has special functions such as electrical conductivity and magnetic conductivity. Chinese patent CN 102978738 A discloses a preparation method of conductive polypropylene fiber, which uses modified tetrapod-like zinc oxide whiskers, conductive potassium titanate whiskers, antimony-doped tin oxide conductive powder, and superconductive carbon black as conductive fibers. Powder, blended with polypropylene and melt-spun, the prepared fiber has low resistivity, high breaking strength, good conductivity and durability. With the general blending method, the fiber percolation threshold is high, and the addition of more conductive particles is prone to problems such as agglomeration, lower mechanical properties, and poor melt fluidity. Reducing the percolation threshold of the system has always been the key to the research and development of conductive fibers. one of the problems. Chinese patent CN103046157 A discloses a preparation method of carbon nanotube/polyurethane/polypropylene composite conductive fiber, by controlling the selective dispersion of conductive filler in the multi-phase high polymer blend system and the separation of two phases to reduce the Percolation threshold, fibers with higher mechanical properties and electrical conductivity were obtained.

Magnetic field-induced assisted processing technology is a new type of composite material preparation technology developed in recent years. In the process of forming magnetic powder/polymer composite materials, the magnetic field is used to induce the orientation of magnetic powder particles to form an orderly arrangement, forming a microfiber or bead structure in the polymer matrix. If the magnetic powder is conductive, it can form an excellent conductive network. The channel realizes the efficient transfer of charges in the matrix, improves the conductivity of the material, and reduces the percolation threshold. The conductive magnetic powder used in the preparation of conductive composite materials by magnetic field induction auxiliary processing needs to use ferromagnetic materials or paramagnetic/diamagnetic materials (under strong magnetic fields). The method of magnetic field induction can reduce the resistivity of composite materials by 3 to 5 An order of magnitude can effectively improve the conductivity of materials, reduce the amount of conductive powder, improve the mechanical properties of materials and reduce costs. Therefore, the magnetic field-induced assisted processing technology has great development potential and is one of the ideal technologies for preparing high-performance conductive fibers. Chinese patent CN 200910154049 discloses a method for magnetically inducing multi-walled carbon nanotubes to be ordered in a chitosan matrix. After a certain treatment, a magnetic multi-walled carbon nanotube/chitosan mixed solution is prepared, and then the mixed solution is injected into the In a mold with permanent magnets placed at both ends, this method is simple and low in cost, and realizes the parallel and orderly arrangement and uniform dispersion of multi-walled carbon nanotubes in the polymer. However, this method uses permanent magnets, and the controllability of the magnetic field strength is poor. Not conducive to industrialized production. Chinese patent CN 201010614797 discloses a method for preparing ordered carbon nanotube/epoxy resin composites induced by a weak magnetic field. Firstly, a carbon nanotube/epoxy resin mixture is prepared, a curing agent is added, and poured into a magnetic field. In the mould, the composite material is formed by reaction curing, and a composite material with excellent comprehensive properties is obtained. The electrical conductivity of the ordered carbon nanotube/epoxy resin composite material is greatly improved compared with the disordered carbon nanotube/epoxy resin composite material.

The above magnetic field-induced auxiliary processing technology is mainly used in the static processing of polymer molding, but for the processing of chemical fiber, which is completed under high-speed shear and tensile flow field, there is no related equipment and Methods Magnetic field-assisted induction molding was performed. Therefore, the present invention mainly aims at the deficiencies of the prior art, and proposes a magnetic field-induced assisted spinning forming device and a related method suitable for the chemical fiber forming process for preparing chemical fibers with conductive and electromagnetic shielding functions.

Contents of the invention

The object of the present invention is to provide a magnetic field induction assisted spinning forming device for conductive/magnetic conductive chemical fibers and its production method, which is characterized in that it utilizes the basic principle of magnetic field induction to design and manufacture a magnetic field induction device suitable for melt spinning forming, And a method for preparing magnetic powder/polymer composite conductive/magnetic conductive fibers by adopting a melt spinning machine equipped with a magnetic field induction device.

The purpose of the present invention is to adopt the following technical measures to achieve, wherein the parts of raw materials are parts by weight unless otherwise specified.

A magnetic field induction assisted spinning forming device for conductive/magnetic conductive chemical fibers, the device contains an electromagnetic coil, the electromagnetic coil is vertically connected to the spinneret, the spinneret is connected to the melt flow channel, and the hollow part of the electromagnetic coil is aligned with the nozzle. The center of the wire plate makes the filament pass through the hollow part of the electromagnetic coil smoothly. When spinning, the coil is connected to a DC power supply to generate magnetic lines of force. The direction of the magnetic force lines is parallel to the direction of movement of the filaments. Through the center of the electromagnetic coil, under the action of the magnetic field of the electromagnetic coil, the magnetic particles are arranged according to the direction of the magnetic force lines to form a microfiber or bead structure, and these microfiber and bead structures act as a conductive/magnetic network, thereby greatly reducing the conductivity / Percolation threshold of magnetic powder.

The inner diameter of the electromagnetic coil is matched and designed according to the specifications of the spinneret, and the magnetic field strength of the coil is adjusted by a DC power supply, and the magnetic field strength is controlled at 0.01-2T.

The production method of the magnetic field induction assisted spinning forming device of conductive/magnetic conductive chemical fibers comprises the following steps:

1-20 parts by weight of magnetic powder, 0.5-2 parts by weight of dispersant, 0.1-0.5 parts by weight of antioxidant, 77.5-98.4 parts by weight of polymer, and the materials are melt-blended, and the mixed melt is sprayed by a metering pump. Hole extrusion, the raw filaments that have not been completely solidified pass through the electromagnetic coil, so that the magnetic powder in it is arranged in the direction of the magnetic force lines under the induction of the magnetic field, the filaments are cooled and solidified, and then oiled, bundled, drawn and heat-set to obtain Finished conductive/magnetic composite fiber.

The magnetic powder is γ-Fe ₂ O ₃ , CoFe ₂ O ₄ , MnFe ₂ O ₄ , NiFe ₂ O ₄ , Zn Fe ₂ O ₄ , Fe ₃ O ₄ , Ni, Co, Fe, FeCo or NiFe powder any of the.

The dispersant is γ-aminopropyltriethoxysilane, γ-glycidyloxypropyltrimethoxysilane, γ-(methacryloyloxy)propyltrimethoxysilane, N-β-( Aminoethyl)-γ-aminopropylmethyldimethoxysilane, isopropyl triisostearate titanate, isopropyl tris(dioctylpyrophosphate acyloxy)titanate, polyethylene wax , at least one of maleic anhydride grafted polypropylene and maleic anhydride grafted polyethylene.

The antioxidant is tetrakis [β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate] pentaerythritol ester, β-(3,5-di-tert-butyl-4-hydroxyphenyl) propane Any one of n-octadecanyl acid, pentaerythritol distearyl diphosphite or 1,1,3-tris(2-methyl-4-hydroxy-5-tert-butylphenyl)butane.

The polymer is any one of polymers capable of melt spinning such as polyethylene, polypropylene, polyester, polyurethane, polyamide, polyphenylene sulfide, polyetheretherketone and the like.

The blending and melting method is that the magnetic powder, dispersant, antioxidant and part of the polymer are first made into a magnetic powder master batch and then blended and melted with the polymer.

Structural characterization and performance testing:

1. Use a fiber specific resistance meter to test the specific resistance of the fiber. See the example for details, the results show that: the specific resistance of the fiber is 10 ⁵ to 1.2×10 ⁷ Ω·cm, all of which are less than 10 ⁸ Ω·cm, which belongs to the conductive fiber.

2. Use a single fiber strength tester to test the breaking strength and elongation at break of the fiber. See the examples for details, the results show that the breaking strength of the fiber is 2.0-7.0cN/dtex, and the breaking elongation is 10-35%, which meet the basic requirements for use.

3. A scanning electron microscope (SEM) is used to test the cross section of the fiber to observe the dispersion of the magnetic particles in the matrix. See Figure 2 for details. The results show that the content of Ni powder is relatively high, and there is a certain amount of agglomeration in the polypropylene matrix. However, from the perspective of fiber specific resistance and mechanical properties, the performance of the fiber also meets the requirements for use.

The present invention has the following advantages:

1. Under the induction of the magnetic field, the magnetic conductive particles in the fiber are arranged into a microfiber or beaded structure, which greatly reduces the percolation threshold of the composite conductive fiber, and can greatly improve the conductivity of the fiber while reducing the amount of conductive powder added. At the same time, the low amount of conductive powder added enables the conductive composite fiber to maintain high mechanical properties.

2. Magnetic induction technology is a clean and safe auxiliary processing technology. Its equipment is simple in structure and easy to install. It only needs a small modification on the basis of existing spinning equipment to implement this technology, without affecting ordinary melt spinning.

3. The device is universal and can be processed in a wide range, and is suitable for various melt-spinnable polymers and different magnetic powders.

Description of drawings

Figure 1 is a schematic diagram of the structure of the magnetic field-induced assisted spinning forming device

1 is the spinning melt mixed with magnetic particles; 2 is the spinneret hole; 3 is the electromagnetic coil; 4 is the magnetic field line generated by the electromagnetic coil; 5 is the conductive/magnetic composite fiber formed by spinning.

Fig. 2 is the cross-section scanning electron micrograph picture of the Ni/polypropylene composite fiber that Ni powder content is 17.5%

Detailed ways

The present invention is specifically described below by examples, it is necessary to point out that the following examples are only used to further illustrate the present invention, and can not be interpreted as limiting the protection scope of the present invention, those skilled in the art can understand the present invention according to the contents of the present invention The invention makes some non-essential improvements and adjustments.

Example 1

A magnetic field induction auxiliary spinning forming device for conductive/magnetic conductive chemical fibers, the device contains an electromagnetic coil 3, the electromagnetic coil 3 is vertically connected to the spinneret 2, the spinneret 2 is connected to the melt flow channel 1, and the electromagnetic coil 3 The hollow part of the spinneret is aligned with the center of the spinneret, so that the thread 5 passes smoothly through the hollow part of the electromagnetic coil. When spinning, the coil is connected to a DC power supply to generate magnetic force lines 4. The direction of the magnetic force lines is parallel to the direction of the thread. The silk melt is ejected through the spinneret hole, and passes through the center of the electromagnetic coil. Under the action of the magnetic field of the electromagnetic coil, the magnetic particles are arranged according to the direction of the magnetic force line to form a microfiber or bead structure. The role of the network, thereby greatly reducing the percolation threshold of conductive/magnetic powder.

In this example, commonly used polypropylene is selected as the matrix, and reduced iron powder with high electrical conductivity and magnetic permeability is used as the magnetic powder.

Step 1: the preparation of conductive/magnetic polypropylene masterbatch, with 20 parts by weight Fe ₃ O ₄ powder, 68 parts by weight polypropylene chips, 5 parts by weight isopropyl titanate triisostearate, 5 parts by weight Malay Anhydride grafted polypropylene, 2 parts by weight of tetrakis [β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate] pentaerythritol ester are mixed evenly, then mixed by twin-screw extruder and extruded to granulate , the extrusion temperature is 170°C, and the conductive/magnetic polypropylene masterbatch is obtained.

Step 2: Preparation of conductive/magnetic polypropylene fibers. Blend and spin 5 parts by weight of the obtained polypropylene masterbatch and 95 parts by weight of polypropylene chips. The temperature of the screw is controlled at 195-230 °C, the magnetic field strength is 1T, and the specification of the metering pump is 0.6ml/r, metering pump rotation speed 10r/min, spinneret hole diameter 0.4mm, number of holes 18, winding speed 400m/min, after winding, the tow is subjected to 2 times hot drawing, and the content of reduced iron powder is 1.0 % conductive polypropylene fiber, the breaking strength is 5.5cN/dtex, the breaking elongation is 15%, and the specific resistance is 1.2×10 ⁷ Ω·cm.

Example 2

Conductive/magnetic polyethylene fibers were prepared according to the magnetic field-induced assisted spinning device for conductive/magnetic chemical fibers in Example 1. In this example, the commonly used thermoplastic resin polyethylene was selected as the matrix, and Ni powder was used as the magnetic powder.

Step 1: Preparation of conductive/magnetic polyethylene masterbatch, 30 parts by weight of Ni powder, 64 parts by weight of polyethylene chips, 3 parts by weight of isopropyl tris (dioctyl pyrophosphate acyloxy) titanate, 2 Parts by weight of polyethylene wax and 1 part by weight of tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid]pentaerythritol ester are mixed evenly and then mixed by a twin-screw extruder and extruded to granulate , the extrusion temperature is 200°C to obtain conductive/magnetic polyethylene masterbatch.

Step 2: Preparation of conductive/magnetic conductive vinyl fibers. Blend and spin 30 parts by weight of the obtained polyethylene masterbatch and 70 parts by weight of polyethylene chips. The screw temperature is controlled at 230-250°C, the magnetic field strength is 1.5T, and the metering pump specifications 0.6ml/r, metering pump rotation speed 10r/min, spinneret hole diameter 0.4mm, number of holes 18, winding speed 400m/min, after winding, the tow is subjected to 2 times hot drawing to obtain a Ni powder content of 9% The conductive polyethylene fiber has a breaking strength of 5.3cN/dtex, a breaking elongation of 18%, and a specific resistance of 6.0×10 ⁶ Ω·cm.

Example 3

Conductive/magnetic conductive polypropylene fibers were prepared according to the magnetic field induction assisted spinning forming device of conductive/magnetic conductive chemical fibers in Example 1. In this example, commonly used thermoplastic resin polypropylene was selected as the matrix, and Ni powder was used as the magnetic powder.

Step 1: Preparation of conductive/magnetic polypropylene masterbatch, grafting 35 parts by weight of Ni powder, 60 parts by weight of polypropylene chips, 1.0 parts by weight of γ-aminopropyltriethoxysilane, and 1.0 parts by weight of maleic anhydride Polyethylene, 2.0 parts by weight polyethylene wax, 1.0 parts by weight β-(3,5-di-tert-butyl-4-hydroxyphenyl) n-octadecanyl propionate are mixed evenly and then mixed by a twin-screw extruder And extrusion granulation, the extrusion temperature is 170 ° C, to obtain conductive / magnetic polypropylene masterbatch.

Step 2: Preparation of conductive/magnetic polypropylene fibers. Blend and spin 50 parts by weight of the obtained polypropylene masterbatch and 50 parts by weight of polypropylene chips. The temperature of the screw is controlled at 195-230°C, the magnetic field strength is 0.8T, and the metering pump The specification is 0.6ml/r, the rotation speed of the metering pump is 10r/min, the diameter of the spinneret hole is 0.4mm, the number of holes is 18, and the winding speed is 400m/min. % conductive polypropylene fiber, the breaking strength is 4.5cN/dtex, the breaking elongation is 12%, and the specific resistance is 7.2×10 ⁴ Ω·cm.

Example 4

Conductive/magnetic polyester fibers were prepared according to the magnetic field-induced assisted spinning device for conductive/magnetic chemical fibers in Example 1. In this example, polyester was selected as the matrix, and CoFe ₂ O ₄ was used as the magnetic powder.

Step 1: Preparation of conductive/magnetic polyester masterbatch, 25 parts by weight of CoFe ₂ O ₄ , 70 parts by weight of polyester chips, 2.0 parts by weight of isopropyl tris(dioctyl pyrophosphate acyloxy) titanate , 1.5 parts by weight of γ-(methacryloxy) propyl trimethoxysilane, 1.5 parts by weight of pentaerythritol distearyl diphosphite are mixed uniformly and then extruded and granulated by a twin-screw extruder, and the extrusion temperature at 270°C to obtain conductive/magnetic polyester masterbatches.

Step 2: Preparation of conductive/magnetic polyester fiber. Blend and spin 30 parts by weight of the obtained polyester masterbatch and 70 parts by weight of polyester chips. The temperature of the screw is controlled at 290-300°C, the magnetic field strength is 1T, and the specification of the metering pump 0.6ml/r, metering pump rotation speed 10r/min, spinneret hole diameter 0.4mm, number of holes 18, winding speed 400m/min, the tow after winding is carried out 2 times hot drawing, obtains CoFe ₂ O _The content is 7.5% conductive/magnetic polyester fiber, breaking strength 4.6cN/dtex, breaking elongation 20%, specific resistance 1.2×10 ⁶ Ω·cm.

Example 5

Conductive/magnetic conductive polyurethane fibers were prepared according to the magnetic field-induced assisted spinning device for conductive/magnetic conductive chemical fibers in Example 1. In this example, polyurethane was selected as the matrix, and FeCo was used as the magnetic powder.

Step 1: the preparation of conductive/magnetic polyurethane masterbatch, 20 parts by weight of FeCo, 78 parts by weight of polyester chips, 1.2 parts by weight of isopropyl triisostearate titanate, 1.8 parts by weight of N-β-(aminoethyl Base)-γ-aminopropylmethyldimethoxysilane, 1.0 parts by weight of antioxidant 1,1,3-tris(2-methyl-4-hydroxyl-5-tert-butylphenyl)butane mixed evenly Finally, extrude and granulate through a twin-screw extruder at an extrusion temperature of 180°C to obtain conductive/magnetic conductive polyurethane masterbatches.

Step 2: Preparation of conductive/magnetic polyurethane fiber. Blend and spin 30 parts by weight of the obtained polyurethane masterbatch and 70 parts by weight of polyurethane chips. The temperature of the screw is controlled at 210-220°C, the magnetic field strength is 0.5T, and the specification of the metering pump is 0.6ml /r, metering pump revolutions 10r/min, spinneret hole diameter 0.4mm, number of holes 18, winding speed 400m/min, after winding, the tow is subjected to 2 times hot drawing to obtain a conductive/ Magnetic conductive polyurethane fiber, breaking strength 5.3cN/dtex, breaking elongation 35%, specific resistance 8.0×10 ⁵ Ω·cm.

Example 6

Conductive/magnetic conductive polyamide fibers were prepared according to the magnetic field-induced assisted spinning device for conductive/magnetic conductive chemical fibers in Example 1. In this example, polyamide was selected as the matrix, and NiFe ₂ O ₄ was used as the magnetic powder.

Step 1: Preparation of conductive/magnetic polyamide masterbatch, 40 parts by weight of NiFe ₂ O ₄ , 55 parts by weight of polyamide slices, 2 parts by weight of γ-glycidyl etheroxypropyl trimethoxysilane, 2 parts by weight of three Isopropyl isostearate titanate and 1 part by weight of pentaerythritol distearyl diphosphite are uniformly mixed and then extruded and granulated by a twin-screw extruder at an extrusion temperature of 180°C to obtain a conductive/magnetic conductive polymer Amide masterbatch.

Step 2: Preparation of conductive/magnetic polyamide fibers, blending and spinning 50 parts by weight of the obtained polyamide masterbatch and 50 parts by weight of polyamide chips, controlling the screw temperature at 250-260 °C, the magnetic field strength is 2T, and the metering pump specifications 0.6ml/r, metering pump rotation speed 10r/min, spinneret hole diameter 0.4mm, number of holes 18, winding speed 400m/min, after winding the tow is carried out 2 times hot drawing, obtain NiFe ₂ O _The content is 20% conductive/magnetic polyamide fiber, breaking strength 3.5cN/dtex, breaking elongation 12%, specific resistance 7.5×10 ⁴ Ω·cm.

Example 7

Conductive/magnetic conductive polyphenylene sulfide fibers were prepared according to the magnetic field-induced assisted spinning device for conductive/magnetic conductive chemical fibers in Example 1. In this example, polyphenylene sulfide was selected as the matrix, and NiFe was used as the magnetic powder.

Step 1: Preparation of conductive/magnetic polyphenylene sulfide masterbatch, 25 parts by weight of NiFe, 72 parts by weight of polyphenylene sulfide chips, 2 parts by weight of N-β-(aminoethyl)-γ-aminopropyl methyl Dimethoxysilane and 1 part by weight of 1,1,3-tris(2-methyl-4-hydroxy-5-tert-butylphenyl)butane are uniformly mixed and then extruded and granulated by a twin-screw extruder , the extrusion temperature is 290°C, and the conductive/magnetic conductive polyphenylene sulfide masterbatch is obtained.

Step 2: Preparation of conductive/magnetic conductive polyphenylene sulfide fibers. Blend and spin 30 parts by weight of the obtained polyphenylene sulfide masterbatch and 70 parts by weight of polyphenylene sulfide chips. The temperature of the screw is controlled at 310-320 °C, and the magnetic field Strength 1.2T, metering pump specification 0.6ml/r, metering pump rotation speed 10r/min, spinneret hole diameter 0.4mm, number of holes 18, winding speed 400m/min, after winding, the tow is drawn twice hot, A conductive/magnetic polyphenylene sulfide fiber with a NiFe content of 7.5% was obtained, with a breaking strength of 3.1 cN/dtex, a breaking elongation of 22%, and a specific resistance of 8.6×10 ⁶ Ω·cm.

Example 8

Conductive/magnetic conductive polyether ether ketone fibers were prepared according to the magnetic field-induced assisted spinning device for conductive/magnetic conductive chemical fibers in Example 1. In this example, polyether ether ketone was selected as the matrix and FeCo was used as the magnetic powder.

Step 1: Preparation of conductive/magnetic polyether ether ketone, 20 parts by weight of FeCo, 76 parts by weight of polyphenylene sulfide chips, 1.5 parts by weight of isopropyl tris(dioctyl pyrophosphate acyloxy) titanate, 1.5 parts by weight of N-β-(aminoethyl)-γ-aminopropylmethyldimethoxysilane, 1 part by weight of tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propane Acid] pentaerythritol esters are mixed uniformly and then extruded and granulated by a twin-screw extruder at an extrusion temperature of 360°C to obtain conductive/magnetic conductive polyetheretherketone masterbatches.

Step 2: Preparation of conductive/magnetic polyether ether ketone fibers, blending and spinning 20 parts by weight of the obtained polyether ether ketone masterbatch and 80 parts by weight of polyether ether ketone chips, controlling the screw temperature at 370-380 °C, and using a magnetic field Intensity 1T, metering pump specification 0.6ml/r, metering pump rotation speed 10r/min, spinneret hole diameter 0.4mm, number of holes 18, winding speed 400m/min, after winding, the tow is subjected to 2 times thermal drawing to obtain The conductive/magnetic polyetheretherketone fiber with FeCo content of 4% has a breaking strength of 4.8cN/dtex, a breaking elongation of 19%, and a specific resistance of 2.6×10 ⁵ Ω·cm.

Claims (8)

1. A magnetic field-induced auxiliary spinning forming device for conductive/magnetic conductive chemical fibers, characterized in that the main body of the magnetic field-induced auxiliary spinning forming device is an electromagnetic coil (3), and the electromagnetic coil (3) is perpendicular to the spinneret (2) detachable connection, the spinneret (2) is connected with the melt flow channel (1), the hollow part of the electromagnetic coil (3) is aligned with the center of the spinneret, so that the filament (5) passes through the hollow part of the electromagnetic coil smoothly, When spinning, the coil is connected to a DC power supply to generate magnetic force lines (4). The direction of the magnetic force lines is parallel to the direction of movement of the filaments. The spinning melt mixed with magnetic particles is sprayed out through the spinneret hole, passes through the center of the electromagnetic coil, and passes through the center of the electromagnetic coil. Under the action of a magnetic field, the magnetic particles are arranged in the direction of the magnetic force lines to form a microfiber or bead structure. These microfiber and bead structures function as a conductive/magnetic network, thereby greatly reducing the percolation threshold of the conductive/magnetic powder. 2. according to the magnetic field induction auxiliary spinning forming device of the described conduction/magnetism chemical fiber of claim 1, it is characterized in that the inner diameter of the electromagnetic coil is matched and designed according to the spinneret specification, and the magnetic field strength of the coil is regulated by a DC power supply, and the magnetic field strength is controlled at 0.01～2T. 3. according to the production method of the magnetic field induction auxiliary spinning forming device of the conductive/magnetic chemical fiber described in claim 1, it is characterized in that the method comprises the following steps: 1-20 parts by weight of magnetic powder, 0.5-2 parts by weight of dispersant, 0.1-0.5 parts by weight of antioxidant, 77.5-98.4 parts by weight of polymer, and the materials are melt-blended, and the mixed melt is sprayed by a metering pump. Hole extrusion, the primary filaments that have not been completely solidified pass through the interior of the electromagnetic coil, so that the magnetic powder in it is arranged in the direction of the magnetic force lines under the induction of a magnetic field to form a microfiber or bead structure. The filaments are cooled and solidified, and then oiled, bundled, Drawing and heat setting to obtain the finished conductive/magnetic composite fiber. 4. According to claim 3, the production method of the magnetic field induction assisted spinning forming device of the conductive/magnetic conductive chemical fiber is characterized in that the magnetic powder is γ-Fe ₂ O ₃ , CoFe ₂ O ₄ , MnFe ₂ O ₄ , Any of NiFe ₂ O ₄ , ZnFe ₂ O ₄ , Fe ₃ O ₄ , Ni, Co, Fe, FeCo or NiFe powder. 5. according to the production method of the magnetic field induction auxiliary spinning forming device of the conductive/magnetic chemical fiber described in claim 3, it is characterized in that the dispersant is γ-aminopropyltriethoxysilane, γ-glycidyl ether oxypropylene Trimethoxysilane, γ-(methacryloyloxy)propyltrimethoxysilane, N-β-(aminoethyl)-γ-aminopropylmethyldimethoxysilane, triisostearic acid At least one of isopropyl titanate, isopropyl tris(dioctylpyrophosphate acyloxy) titanate, polyethylene wax, maleic anhydride grafted polypropylene and maleic anhydride grafted polyethylene. 6. according to the production method of the magnetic field induction auxiliary spinning forming device of the conductive/magnetic chemical fiber described in claim 3, it is characterized in that the antioxidant is tetrakis[β-(3,5-di-tert-butyl-4-hydroxybenzene base) propionate] pentaerythritol ester, β-(3,5-di-tert-butyl-4-hydroxyphenyl) n-octadecyl propionate, pentaerythritol distearyl diphosphite or 1,1,3 - any one of tris(2-methyl-4-hydroxy-5-tert-butylphenyl)butane. 7. The production method of the magnetic field induction assisted spinning forming device of the conductive/magnetic chemical fiber according to claim 3, wherein the polymer is polyethylene, polypropylene, polyester, polyurethane, polyamide, polyphenylene sulfide , Polyetheretherketone can be any of the polymers that can be melt-spun. 8. According to the production method of the magnetic field induction assisted spinning forming device of the conductive/magnetic conductive chemical fiber according to claim 3, it is characterized in that the blending and melting mode is magnetic powder and dispersant, anti-oxidant and part of the polymer. After forming the magnetic powder master batch, it is blended and melted with the polymer.