Co / Ni / C composite reinforced anti-electromagnetic interference nylon material and preparation method thereof

Abstract

The invention discloses a Co / Ni / C composite reinforced anti-electromagnetic interference nylon material and a preparation method thereof, and belongs to the technical field of polymer functional composite materials. The material is prepared by taking PA6 nylon as a matrix, taking Co / Ni / C composite microspheres as a functional reinforcing filler and supplementing with a compound processing aid. The preparation method comprises the following steps: preparing a cobalt-nickel bimetal Prussian blue cyano precursor through a room-temperature chemical precipitation method, calcining the precursor in an inert atmosphere at 550-700 DEG C to obtain Co / Ni / C composite microspheres with the particle size of 400-500nm, uniformly distributing Co / Ni / C phases, and carrying out melt blending and extrusion molding on the Co / Ni / C composite microspheres, PA6 and an auxiliary agent. The problems that filler of a traditional electromagnetic shielding nylon material is prone to agglomeration, and shielding and mechanical properties are difficult to cooperate are solved, the obtained material has excellent electromagnetic shielding performance and mechanical strength, and meanwhile the tensile property and wear resistance are improved.

Description

Technical Field

[0001] This invention belongs to the field of polymer functional composite materials technology, specifically relating to a Co / Ni / C composite reinforced anti-electromagnetic interference nylon material and its preparation method. Background Technology

[0002] Nylon (polyamide), as a general-purpose engineering plastic with excellent comprehensive performance, possesses good mechanical strength, wear resistance, chemical corrosion resistance, electrical insulation, and easy processing and molding. Due to its cost-effectiveness, it is widely used in high-end manufacturing fields such as electronic appliance housings, communication equipment components, automotive electronic components, and aerospace cable sheaths. With the rapid development of industries such as 5G communication, smart homes, and new energy vehicles, electronic components are gradually iterating towards higher frequencies, integration, miniaturization, and thinner designs. The high-frequency electromagnetic radiation and electromagnetic crosstalk generated during equipment operation are becoming increasingly serious problems. These not only cause signal distortion and malfunctions in internal electronic components but also create electromagnetic pollution, potentially impacting surrounding equipment and human health. Traditional pure nylon used in the electronics and electrical fields only possesses basic insulation properties and lacks any electromagnetic shielding capabilities, failing to meet the demands of today's complex electromagnetic environments. Therefore, developing nylon composite materials that combine structural mechanical load-bearing capacity with highly efficient electromagnetic interference protection has become a core direction for industry research and application.

[0003] Currently, most commercially available electromagnetic interference (EMI) resistant nylon modified materials employ physical blending to add single-function fillers for electromagnetic shielding. These fillers are mainly divided into two categories: carbon-based fillers and metal-based fillers. However, both have some problems. For example, single carbon-based fillers (carbon black, graphite, carbon fiber, carbon nanotubes) rely solely on dielectric loss to attenuate electromagnetic waves, resulting in limited electromagnetic shielding effectiveness. Furthermore, carbon fillers have high surface energy and poor compatibility with the nylon matrix interface, making them prone to agglomeration. Adding them significantly reduces the toughness and processing fluidity of nylon. While single metal-based fillers (iron powder, copper powder, nickel powder) possess certain magnetic loss and conductivity properties, their high density and the difficulty in achieving nanoscale size and uniform dispersion with conventional metal fillers lead to particle agglomeration and weak interfacial bonding at high filler levels. This not only significantly increases the weight of the composite material but also causes a sharp decline in the material's mechanical properties. It is impossible to achieve efficient electromagnetic shielding while maintaining the structural strength of the nylon matrix; that is, it is difficult to synergistically improve electromagnetic shielding performance and mechanical properties. Summary of the Invention

[0004] To address the technical problems of existing electromagnetic interference (EMI) shielding nylon materials, such as insufficient electromagnetic shielding effectiveness, easy agglomeration of functional fillers, and the inability to synergistically improve mechanical and shielding performance, this invention provides a Co / Ni / C composite reinforced EMI shielding nylon material and its preparation method. A cobalt-nickel bimetallic Prussian blue cyano-based precursor with regular morphology and uniform composition is prepared by room temperature chemical precipitation. After calcination in an inert atmosphere, Co / Ni / C composite microspheres with controllable particle size are obtained. The Co / Ni / C phase is uniformly distributed. When used as a multifunctional reinforcing filler and melt-blended with nylon resin, it can fully utilize the multiple effects of the metallic phase magnetic loss, the carbon phase dielectric loss, and synergistic reinforcement, significantly improving the EMI shielding effectiveness of the nylon material while effectively improving the mechanical strength of the composite material.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A Co / Ni / C composite reinforced electromagnetic interference nylon material is disclosed, which uses PA6 nylon as the continuous phase matrix and Co / Ni / C composite microspheres as the dispersed phase functional reinforcing filler, supplemented with silane coupling agents, antioxidants, lubricants and other processing aids; the Co / Ni / C composite microspheres are prepared by calcining cobalt-nickel bimetallic Prussian blue cyano precursor in an inert atmosphere at 550~700℃, with a particle size of 400~500nm, and all elements are uniformly dispersed in the Co / Ni / C composite microspheres.

[0006] A method for preparing a Co / Ni / C composite reinforced electromagnetic interference nylon material specifically includes the following steps: S1. Preparation of cobalt-nickel bimetallic Prussian blue cyano precursor: By mass, 0.5-1.5 parts of nickel nitrate hexahydrate (Ni(NO3)2·6H2O) were dispersed in a mixed solvent of 100-160 parts of anhydrous ethanol and 45-70 parts of deionized water. The mixture was stirred continuously at 300-500 r / min for 20-30 min until the metal salt was completely dissolved, resulting in a homogeneous and transparent solution A. Under continuous stirring, 6-9 parts of a 0.2-0.3 mol / L potassium hexacyanocobalaminate aqueous solution (K3Co(CN)6) were slowly added dropwise to solution A. The mixture was then aged at room temperature and under sealed conditions for 6-10 h to obtain a cobalt-nickel bimetallic Prussian blue cyano precursor precipitate.

[0007] S2. Preparation of porous Co / Ni / C composite microspheres: The precipitate was centrifuged, washed 3-5 times with anhydrous ethanol, and dried at 70-80℃. The precursor was placed in a tube furnace, and N2 atmosphere was introduced. The temperature was increased to 550-700℃ at 3-5℃ / min, and calcined at a constant temperature for 3-5h. The furnace was then cooled to obtain Co / Ni / C composite microspheres.

[0008] S3, Melt blending and molding of nylon composite materials: Accurately weigh the following raw materials according to mass percentages: 75-92 parts nylon body, 20-30 parts Co / Ni / C composite microspheres, and 3-3.6 parts processing aids; wherein the processing aids consist of silane coupling agent KH-550, antioxidant 1010, and stearic acid lubricant, with a mass ratio of 1:1:1; the nylon body is PA6; The silane coupling agent KH-550 was diluted and activated with anhydrous ethanol (volume ratio 1:10), and then added together with Co / Ni / C composite microspheres into a high-speed mixer. The mixture was stirred to ensure the coupling agent uniformly coated the surface of the microspheres. The ethanol was then evaporated to remove the ethanol, improving the interfacial compatibility between the microspheres and the nylon matrix. Subsequently, the weighed nylon matrix, antioxidant 1010, and stearic acid lubricant were added, and the stirring speed was adjusted to 600-800 r / min. Mixing continued at room temperature for 8-15 min to ensure thorough and uniform dispersion of all components. To avoid filler agglomeration, the mixed material is fed into a twin-screw extruder, and the temperature of each section of the extruder is controlled as follows: Zone 1 temperature 200~210℃, Zone 2 temperature 210~220℃, Zone 3 temperature 220~230℃, Zone 4 temperature 230~240℃, Zone 5 temperature 240~250℃, Zone 6 temperature 250~260℃, and the main engine speed is 200~300r / min. After melt blending and screw extrusion, the final Co / Ni / C composite reinforced anti-electromagnetic interference nylon material is obtained.

[0009] The beneficial effects of this invention are as follows: (1) By controlling the preparation and calcination process of cobalt-nickel bimetallic Prussian blue cyano precursor, this invention achieves the final Co / Ni / C composite microsphere size in the range of 400~500nm, with complete microsphere structure and uniform distribution of Co / Ni / C elements, while avoiding defects such as stress concentration and easy breakage of composite materials caused by excessive size.

[0010] (2) The prepared Co / Ni / C composite microspheres have good compatibility with the nylon matrix and are evenly dispersed, which improves the electromagnetic interference resistance of nylon materials.

[0011] (3) Co / Ni / C composite microspheres can be used as highly efficient reinforcing fillers to improve the scratch resistance of nylon materials and enhance the tensile strength of nylon materials. This allows the composite material to maintain good mechanical properties while possessing excellent electromagnetic interference protection performance, thus achieving a synergistic improvement in electromagnetic interference protection performance and mechanical properties. Attached Figure Description

[0012] Figure 1 This is a TEM transmission electron microscope image of the Co / Ni / C composite microspheres obtained in Example 1; Figure 2 The image shows the EDS elemental distribution of the Co / Ni / C composite microspheres obtained in Example 1. Figure 3 Microscopic images of the surface of the nylon material obtained in Example 1; Figure 4 This is a comparison chart of the electromagnetic shielding effectiveness of nylon materials in Example 1 and Comparative Example 1 in the 8-12GHz frequency band. Figure 5 The strain curves of the nylon materials in Example 1 and Comparative Examples 1-3 are shown. Figure 6 The surface morphology of the nylon materials after wear resistance testing in Examples 1 and Comparative Examples 1-3 is shown. Detailed Implementation

[0013] To make the above-mentioned objectives, features, and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to examples. The following content is merely illustrative and explanatory of the concept of the present invention. Those skilled in the art can make various modifications or additions to the described specific embodiments or use similar methods to replace them, as long as they do not deviate from the inventive concept, all of which should fall within the protection scope of the present invention. The preparation method of the present invention will be described below through specific embodiments. Example 1

[0014] A method for preparing a Co / Ni / C composite reinforced anti-electromagnetic interference nylon material, comprising the following steps: S1. Preparation of cobalt-nickel bimetallic Prussian blue cyano precursor: 0.5 parts of nickel nitrate hexahydrate were dispersed in a mixed solvent of 100 parts anhydrous ethanol and 45 parts deionized water, and stirred continuously at 300 r / min for 20 min until the metal salt was completely dissolved, resulting in a uniform and transparent solution A. Under continuous stirring, 6 parts of 0.2 mol / L potassium hexacyanocobalaminate aqueous solution were slowly added dropwise to solution A, and then allowed to stand and age for 6 h at room temperature and under sealed conditions to obtain a cobalt-nickel bimetallic Prussian blue cyano precursor precipitate.

[0015] S2. Preparation of Co / Ni / C composite microspheres: The precipitate was centrifuged, washed three times with anhydrous ethanol, and dried at 70°C. The precursor was placed in a tube furnace, and a N2 atmosphere was introduced. The temperature was increased to 550°C at 3°C / min, and calcined at a constant temperature for 3 hours. The furnace was then cooled to obtain Co / Ni / C composite microspheres.

[0016] S3, Melt blending and molding of nylon composite materials: Weigh the raw materials according to the following mass percentages: 92 parts PA6 nylon, 30 parts Co / Ni / C composite microspheres, and 3.6 parts processing aids; the processing aids are silane coupling agent KH-550, antioxidant 1010, and stearic acid lubricant in a mass ratio of 1:1:1.

[0017] The silane coupling agent KH-550 was diluted and activated with anhydrous ethanol (volume ratio 1:10), and then added together with Co / Ni / C composite microspheres into a high-speed mixer. After stirring, the ethanol was evaporated to remove the ethanol. PA6 nylon, antioxidant 1010, and stearic acid lubricant were then added, and the mixture was stirred at room temperature for 8 minutes at a speed of 600 r / min. The material was fed into a twin-screw extruder with zone temperatures of 200℃ in zone 1, 210℃ in zone 2, 220℃ in zone 3, 230℃ in zone 4, 240℃ in zone 5, and 250℃ in zone 6. The main extruder speed was 200 r / min. The mixture was melt-blended and extruded to obtain an electromagnetic interference-resistant nylon material.

[0018] Figure 1 The image shows a TEM transmission electron microscope image of the Co / Ni / C composite microspheres obtained in Example 1. It can be seen that the microspheres exhibit a uniform microsphere structure of 400-500 nm, without obvious breakage or large agglomeration.

[0019] Figure 2 The image shows the EDS elemental distribution of the Co / Ni / C composite microspheres obtained in Example 1. It reveals that Co, Ni, C, and N are uniformly distributed throughout the microspheres without elemental segregation. This indicates that the bimetallic Prussian blue precursor possesses atomic-level mixing characteristics and maintains compositional homogeneity after calcination, providing a structural basis for the synergistic effect of magnetic and dielectric losses.

[0020] Figure 3 The image shows a surface microscope image of the nylon material obtained in Example 1. It can be seen that the Co / Ni / C microspheres in the nylon matrix exhibit no obvious agglomeration or porosity defects. This indicates that the filler has good interfacial compatibility with PA6, does not disrupt the matrix continuity, and provides structural assurance for the simultaneous improvement of mechanical and shielding performance. Example 2

[0021] A method for preparing a Co / Ni / C composite reinforced anti-electromagnetic interference nylon material, comprising the following steps: S1. Preparation of cobalt-nickel bimetallic Prussian blue cyano precursor: One part of nickel nitrate hexahydrate was dispersed in a mixed solvent of 130 parts anhydrous ethanol and 58 parts deionized water, and stirred continuously at 400 r / min for 25 min until the metal salt was completely dissolved, resulting in a uniform and transparent solution A. Under continuous stirring, 7.5 parts of a 0.25 mol / L potassium hexacyanocobalaminate aqueous solution were slowly added dropwise to solution A, and then allowed to stand and age for 8 h at room temperature under sealed conditions to obtain a cobalt-nickel bimetallic Prussian blue cyano precursor precipitate.

[0022] S2. Preparation of Co / Ni / C composite microspheres: The precipitate was centrifuged, washed four times with anhydrous ethanol, and dried at 75°C. The precursor was placed in a tube furnace, and a N2 atmosphere was introduced. The temperature was increased to 620°C at 4°C / min, and calcined at a constant temperature for 4 hours. The furnace was then cooled to obtain Co / Ni / C composite microspheres.

[0023] S3, Melt blending and molding of nylon composite materials: The raw materials were weighed according to the following mass percentages: 84 parts PA6 nylon, 25 parts Co / Ni / C composite microspheres, and 3.3 parts processing aids. The processing aids were silane coupling agent KH-550, antioxidant 1010, and stearic acid lubricant in a mass ratio of 1:1:1.

[0024] The silane coupling agent KH-550 was diluted and activated with anhydrous ethanol (volume ratio 1:10), and then added together with Co / Ni / C composite microspheres into a high-speed mixer. After stirring, the ethanol was evaporated to remove the ethanol. PA6 nylon, antioxidant 1010, and stearic acid lubricant were then added, and the mixture was mixed at room temperature for 12 minutes at a speed of 700 r / min. The material was fed into a twin-screw extruder with the following temperatures set: zone 1: 205℃, zone 2: 215℃, zone 3: 225℃, zone 4: 235℃, zone 5: 245℃, and zone 6: 255℃. The main extruder speed was 250 r / min. The mixture was melt-blended and extruded to obtain an electromagnetic interference-resistant nylon material. Example 3

[0025] A method for preparing a Co / Ni / C composite reinforced anti-electromagnetic interference nylon material, comprising the following steps: S1. Preparation of cobalt-nickel bimetallic Prussian blue cyano precursor: 1.5 parts of nickel nitrate hexahydrate were dispersed in a mixed solvent of 160 parts anhydrous ethanol and 70 parts deionized water, and stirred continuously at 500 r / min for 30 min until the metal salt was completely dissolved, resulting in a uniform and transparent solution A. Under continuous stirring, 9 parts of 0.3 mol / L potassium hexacyanocobalaminate aqueous solution were slowly added dropwise to solution A, and then allowed to stand and age for 10 h at room temperature and under sealed conditions to obtain a cobalt-nickel bimetallic Prussian blue cyano precursor precipitate.

[0026] S2. Preparation of Co / Ni / C composite microspheres: The precipitate was centrifuged, washed five times with anhydrous ethanol, and dried at 80°C. The precursor was placed in a tube furnace, and a N2 atmosphere was introduced. The temperature was increased to 700°C at 5°C / min, and calcined at a constant temperature for 5 hours. The furnace was then cooled to obtain Co / Ni / C composite microspheres.

[0027] S3, Melt blending and molding of nylon composite materials: Weigh the raw materials according to the following mass percentages: 75 parts PA6 nylon, 20 parts Co / Ni / C composite microspheres, and 3 parts processing aids; the processing aids are silane coupling agent KH-550, antioxidant 1010, and stearic acid lubricant in a mass ratio of 1:1:1.

[0028] The silane coupling agent KH-550 was diluted and activated with anhydrous ethanol (volume ratio 1:10), and then added together with Co / Ni / C composite microspheres into a high-speed mixer. After stirring, the ethanol was evaporated to remove the ethanol. PA6 nylon, antioxidant 1010, and stearic acid lubricant were then added, and the mixture was mixed at room temperature for 15 minutes at a speed of 800 r / min. The material was fed into a twin-screw extruder with the following temperatures in each section: zone 1 210℃, zone 2 220℃, zone 3 230℃, zone 4 240℃, zone 5 250℃, and zone 6 260℃. The main extruder speed was 300 r / min. The mixture was melt-blended and extruded to obtain an electromagnetic interference-resistant nylon material.

[0029] Comparative Example 1 Without adding Co / Ni / C composite microspheres, and otherwise identical to Example 1, pure PA6 nylon material was obtained by melt extrusion.

[0030] Comparative Example 2 S1. Preparation of cobalt-nickel bimetallic Prussian blue cyano precursor: 2.0 parts of nickel nitrate hexahydrate were dispersed in a mixed solvent of 250 parts of anhydrous ethanol and 100 parts of deionized water, and stirred continuously at 200 r / min for 25 min until the metal salt was completely dissolved to obtain solution A. Under continuous stirring, 15 parts of 0.12 mol / L potassium hexacyanocobalaminate aqueous solution were rapidly added to solution A in one go, and then allowed to stand and age at room temperature for 4 h to obtain the cobalt-nickel bimetallic Prussian blue cyano precursor precipitate.

[0031] S2. Preparation of Co / Ni / C composite microspheres: The precipitate was centrifuged, washed four times with anhydrous ethanol, and dried at 75°C. The precursor was placed in a tube furnace, and an N2 atmosphere was introduced. The temperature was increased to 620°C at 4°C / min, and calcined at a constant temperature for 4 hours. The furnace was then cooled to obtain Co / Ni / C composite microspheres. The measured particle size of the microspheres was approximately 1000 nm, which is far beyond the optimized range of this invention.

[0032] S3, Melt blending and molding of nylon composite materials: The raw material ratio, subsequent mixing and extrusion process parameters were exactly the same as in Example 1, and large-sized microsphere-filled nylon material was obtained.

[0033] Comparative Example 3 Steps S1 and S2 are the same as in Example 1.

[0034] S3, Melt blending and molding of nylon composite materials: Compared with Example 1, the silane coupling agent KH-550 was not diluted and activated with anhydrous ethanol, but was directly dry-mixed with Co / Ni / C composite microspheres. The other raw material ratios, stirring parameters, and extrusion processes were the same as in Example 1, and nylon materials were obtained.

[0035] Figure 4 This is a comparison of the electromagnetic shielding effectiveness of nylon materials in Example 1 and Comparative Example 1 in the 8-12 GHz frequency band. Comparative Example 1 (pure PA6): almost no shielding capability, EMI SE close to 0 dB. Example 1: exhibits highly efficient electromagnetic shielding effectiveness in the 8-12 GHz band, with EMI SE of 30~40 dB, significantly higher than pure nylon.

[0036] Figure 5 The strain curves for nylon materials in Examples 1 and Comparative Examples 1-3 are shown. Comparative Example 1 (pure PA6): Typical yield plateau, high elongation at break, but average strength. Example 1: Yield strength and modulus significantly improved, while maintaining good elongation and no obvious embrittlement. Comparative Example 2 (microsphere particle size ≈ 1000 nm, too large): The curve shows fluctuations in the early stage, with a significant decrease in elongation, indicating easy brittle fracture. This shows that excessively large particle size (1 μm) causes stress concentration and interfacial debonding, leading to a significant decrease in toughness. Comparative Example 3: Because the silane coupling agent was not diluted and activated with ethanol, it could not be uniformly coated on the microsphere surface, resulting in poor dispersion of the microspheres in the PA6 matrix. Tensile strength and elongation at break both decreased significantly, and the material brittleness increased. This indicates that KH-550, after being diluted and activated with anhydrous ethanol and then mixed with microspheres, plays a crucial role in improving interfacial compatibility, enhancing dispersion uniformity, and synergistically achieving excellent shielding and mechanical properties.

[0037] Figure 6 The images show the surface morphology of the nylon materials after wear resistance tests in Examples 1 and 1-3. Example 1: Shallow wear marks, intact surface, significantly improved scratch resistance. Comparative Example 1: Pure PA6 showed severe wear, deep surface scratches, and obvious peeling. Comparative Example 2: Localized peeling pits appeared due to large particle agglomeration. Co / Ni / C microspheres, as a hard wear-resistant phase, can enhance surface hardness and wear resistance when uniformly dispersed. Comparative Example 3: Wear resistance deteriorated, with deep surface wear marks, obvious filler detachment, and pores.

Claims

1. A Co / Ni / C composite reinforced anti-electromagnetic interference nylon material, characterized in that: PA6 nylon was used as the continuous phase matrix, and Co / Ni / C composite microspheres were used as the dispersed phase functional enhancer filler, supplemented with silane coupling agent, antioxidant and stearic acid lubricant processing aid; the Co / Ni / C composite microspheres were prepared by calcining cobalt-nickel bimetallic Prussian blue cyano precursor in an inert atmosphere at 550~700℃, with a particle size of 400~500nm, and the Co / Ni / C phase was uniformly distributed without obvious particle agglomeration; The nylon material is prepared through the following steps: S1. Preparation of cobalt-nickel bimetallic Prussian blue cyano precursor: Nickel nitrate hexahydrate was dispersed in a mixed solvent of anhydrous ethanol and deionized water. After stirring and dissolving, potassium hexacyanocobaltate aqueous solution was added dropwise. The mixture was allowed to stand and age under room temperature and closed conditions to obtain cobalt-nickel bimetallic Prussian blue cyano precursor precipitate. S2. Preparation of porous Co / Ni / C composite microspheres: After centrifugation, washing and drying, the precipitate is placed in a tube furnace, N2 atmosphere is introduced, the temperature is programmed to rise to the calcination temperature, and after constant temperature calcination, it is cooled with the furnace to obtain Co / Ni / C composite microspheres with a particle size of 400~500nm. S3. Melt blending and molding of nylon composite materials: By mass, silane coupling agent KH-550 and anhydrous ethanol are diluted and activated at a volume ratio of 1:

10. After being mixed and stirred with Co / Ni / C composite microspheres and the ethanol is evaporated, PA6 nylon, antioxidant and stearic acid lubricant are added and mixed evenly. The mixture is fed into a twin-screw extruder, melt blended and extruded and granulated to obtain Co / Ni / C composite reinforced anti-electromagnetic interference nylon material.

2. The nylon material according to claim 1, characterized in that, The amount of nickel nitrate hexahydrate added in S1 is 0.5-1.5 parts, the amount of anhydrous ethanol is 100-160 parts, and the amount of deionized water is 45-70 parts.

3. The nylon material according to claim 1, characterized in that, In S1, the stirring speed is 300~500 r / min and the stirring time is 20~30 min.

4. The nylon material according to claim 1, characterized in that, The concentration of potassium hexacyanocobaltate aqueous solution in S1 is 0.2~0.3mol / L, the amount added is 6~9 parts, and the aging time is 6~10h.

5. The nylon material according to claim 1, characterized in that, The heating rate of the tube furnace in S2 is 3~5℃ / min, the calcination temperature is 550~700℃, and the isothermal calcination time is 3~5h.

6. The nylon material according to claim 1, characterized in that, The mass fractions of each raw material in S3 are: 75-92 parts PA6 nylon, 20-30 parts Co / Ni / C composite microspheres, and 3-3.6 parts processing aids.

7. The nylon material according to claim 1, characterized in that, The processing aid consists of silane coupling agent KH-550, antioxidant 1010 and stearic acid lubricant, with a mass ratio of 1:1:

1.

8. The nylon material according to claim 1, characterized in that, The melt blending temperatures of the twin-screw extruder in S3 are: Zone 1: 200~210℃, Zone 2: 210~220℃, Zone 3: 220~230℃, Zone 4: 230~240℃, Zone 5: 240~250℃, Zone 6: 250~260℃, and the main extruder speed is 200~300 r / min.

9. The nylon material according to claim 1, characterized in that, The precipitate in S2 is washed 3-5 times with anhydrous ethanol and dried at a temperature of 70-80℃.

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