Nylon 6 for bulked textured filaments and preparation method thereof

Abstract

The invention relates to the technical field of nylon 6 materials, in particular to nylon 6 for bulked textured filaments and a preparation method of the nylon 6. The nylon 6 for the expanded textured filament is prepared from the following raw materials in parts by mass: 80 to 100 parts of caprolactam, 1 to 2 parts of ethoxylated alkylamine, 0.5 to 1 part of silicone master batch, 2 to 6 parts of carbon fiber, 1 to 2 parts of graphene oxide, 1 to 5 parts of nano silicon dioxide, 1 to 2 parts of dispersing agent, 1 to 5 parts of thermotropic liquid crystal polymer, 1 to 3 parts of polyether block amide, 1 to 2 parts of compatilizer and 0.5 to 1.5 parts of sorbitol surfactant. 0.5-1 part of talcum powder, 1-2 parts of stearic acid, 1-2 parts of a silane coupling agent and 1-2 parts of an antioxidant. While the original electrical insulation and chemical stability of nylon 6 are maintained, the heat conduction, toughness and spinnability are synchronously improved, and the preparation method is simple and suitable for large-scale popularization and application.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of nylon 6 materials, in particular to a nylon 6 for bulking and texturing filaments and a preparation method thereof. BACKGROUND

[0002] Nylon 6 is a material with excellent performance, with outstanding mechanical properties, electrical properties, processing properties, and chemical stability, good electrical insulation under low temperature and dry conditions, extremely low thermal conductivity, and good stability to salt water, bacteria, and mold. Nylon 6 bulking and texturing filaments are made of nylon 6 as raw material, and are made through the processes of spinning, stretching, texturing, networking, and winding. By imparting a stable three-dimensional crimp structure to the fiber, the elasticity and loftiness are improved, and it is widely used in the fields of clothing, luggage, and curtain fabric.

[0003] However, there are still many problems in the practical application of nylon 6 materials. Currently, the thermal conductivity of nylon 6 materials is poor, which limits its application in electronic devices, thermal management materials, and other fields that require efficient heat dissipation. At the same time, the elongation at break of nylon 6 materials is low, and when subjected to impact or external force, brittle fracture easily occurs, affecting the service life and reliability of the material. In addition, the spinnability of nylon 6 materials is poor, and problems such as broken filaments and lint easily occur during the spinning process, resulting in reduced production efficiency and unstable product quality.

[0004] These problems currently restrict the expansion of the application of nylon 6 materials to some extent. Therefore, how to effectively improve the thermal conductivity, elongation at break, and spinnability of nylon 6 materials has become a technical problem that needs to be solved urgently. SUMMARY

[0005] The purpose of the present application is to solve the shortcomings in the prior art and provide a nylon 6 for bulking and texturing filaments and a preparation method thereof.

[0006] A nylon 6 for bulking and texturing filaments, the raw materials of which include, by mass fraction: caprolactam 80-100 parts, ethoxylated alkyl amine 1-2 parts, silicone master batch 0.5-1 part, carbon fiber 2-6 parts, graphene oxide 1-2 parts, nano-silicon dioxide 1-5 parts, dispersing agent 1-2 parts, thermotropic liquid crystal polymer 1-5 parts, polyether block amide 1-3 parts, compatibilizer 1-2 parts, sorbitol surfactant 0.5-1.5 parts, talc 0.5-1 part, stearic acid 1-2 parts, silane coupling agent 1-2 parts, and antioxidant 1-2 parts.

[0007] Preferably, the aspect ratio of the carbon fiber is 5-10:1000-6000.

[0008] Preferably, the dispersing agent is sodium dodecyl sulfate.

[0009] Preferably, the compatibilizer is a titanate coupling agent TMC311.

[0010] Preferably, the sorbitol surfactant is sorbitan monooleate.

[0011] Preferably, the silane coupling agent is a KH-570 coupling agent.

[0012] Preferably, the antioxidant is antioxidant 1076 or / and antioxidant 1010.

[0013] The preparation method of the nylon 6 for the bulking deformed filament comprises the following steps: S1, the carbon fiber is treated by low temperature plasma for 5-10 min, graphene oxide, nano silicon dioxide and dispersant are mixed and ground for 2-5 min to obtain a heat-conducting filler; S2, the thermotropic liquid crystal polymer, polyether block amide, compatibilizer and caprolactam are mixed, stirred at 120-150 DEG C for 5-10 min, the heat-conducting filler is added under stirring, reacted at 220-260 DEG C under nitrogen protection for 1-2 h, the vacuum degree is adjusted to-0.06~ -0.08 MPa, reacted for 2-3 h, water-cooled to 40-50 DEG C, and granulated to obtain a composite base material; S3, the composite base material is dried for 1-2 h, the sorbitol surfactant, talcum powder, stearic acid, silane coupling agent, antioxidant, ethoxylated alkyl amine and silicone master batch are uniformly mixed, extruded, cooled and dried.

[0014] Preferably, in S1, the low temperature plasma treatment power is 300-500 W, the low temperature plasma treatment working gas is air, and the working gas flow rate is 100-150 mL / min.

[0015] Preferably, in S2, during the reaction at 220-260 DEG C under nitrogen protection, the reaction pressure is maintained at 1-2 MPa.

[0016] Beneficial effects: The present application adopts carbon fiber and graphene oxide compound, uses carbon fiber as the main heat conduction channel, uses its high length-diameter ratio to form a continuous heat conduction path, and uses graphene oxide as a branch structure to expand the heat conduction network through interface contact; the low temperature plasma pretreatment enhances the surface activity of the carbon fiber, cooperates with the dispersant to ensure uniform dispersion of the filler and prevent agglomeration, and adds nano silicon dioxide to further fill the matrix gap, reduce the interface thermal resistance, form a heat conduction skeleton, and significantly improve the heat diffusion efficiency.

[0017] The present application utilizes the interaction between the thermotropic liquid crystal polymer and nylon 6, and introduces polyether block amide to further regulate the molecular chain movement ability, absorbs energy through chain segment slipping when stressed, inhibits brittle fracture, so that the product maintains strength while obtaining excellent flexibility, and the elongation effect is excellent.

[0018] The sorbitol derivative, the silicone master batch, talc and stearic acid are used in cooperation to make the spinning process more controllable, the melt flowability is effectively improved by adding talc and stearic acid, the risk of broken yarn is reduced, the interface bonding force between the filler and the matrix is enhanced by the silane coupling agent, the generation of loose yarn is avoided, the melt rheological property is further stabilized by the introduction of the ethoxylated alkyl amine, and the continuous and stable spinning process is ensured.

[0019] The nylon 6 material prepared by the method has the original electrical insulation and chemical stability of nylon 6, realizes synchronous improvement of thermal conductivity, toughness and spinnability, and has a simple preparation method and is suitable for large-scale popularization and application. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 The tensile strength and notched impact strength of the nylon 6 materials obtained in Example 5 and Comparative Examples 1-2 are compared.

[0021] Figure 2 The thermal conductivity and thermal decomposition temperature of the nylon 6 materials obtained in Example 5 and Comparative Examples 1-2 are compared. DETAILED DESCRIPTION

[0022] The application will be further described below in combination with specific embodiments.

[0023] The thermotropic liquid crystal polymer used below is derived from Japan Toray, and the model number is Laperos® E473i, and the vicat softening point is 193℃. The polyether block amide used below is derived from France Arkema, and the model number is Pebax ® 6333 SA 01. The carbon fiber used below is derived from Toray New Materials, and the diameter is 7μm, and the length is 1mm.

[0024] Example 1 A nylon 6 for bulking and texturing filaments, raw materials of which include: 800g of caprolactam, 10g of ethoxylated alkyl amine, 5g of silicone master batch, 20g of carbon fiber, 10g of graphene oxide, 10g of nanosilica, 10g of sodium dodecyl sulfate, 10g of thermotropic liquid crystal polymer, 10g of polyether block amide, 10g of titanate coupling agent TMC311, 5g of Span 80, 5g of talc, 10g of stearic acid, 10g of KH-570 coupling agent, and 10g of antioxidant 1010.

[0025] The preparation method of the nylon 6 for bulking and texturing filaments includes the following steps: S1, the carbon fiber is treated by low temperature plasma for 5 minutes, the low temperature plasma treatment power is 300 W, the low temperature plasma treatment working gas is air, and the working gas flow rate is 100 mL / min; then add graphene oxide, nano silicon dioxide and sodium dodecyl sulfate, mix and grind at a speed of 1000 r / min for 2 minutes to obtain a heat-conducting filler; S2, the thermotropic liquid crystal polymer, polyether block amide, titanate coupling agent TMC311 and caprolactam are mixed, stirred at a temperature of 120 DEG C for 5 minutes at a stirring speed of 350 r / min, the heat-conducting filler is added under stirring, added in 3 times and dispersed uniformly, reacted under nitrogen protection at a temperature of 220 DEG C for 1 h, the reaction pressure is 1 MPa, reacted under a vacuum degree of-0.06 MPa for 2 h, water-cooled to 40 DEG C, and granulated to obtain a composite base material; S3, the composite base material is dried at a temperature of 100 DEG C for 1 h, and the following are mixed uniformly: Span 80, talcum powder, stearic acid, KH-570 coupling agent, antioxidant 1010, ethoxylated alkyl amine and silicone master batch, extruded by a double screw extruder, the extruder barrel temperature is 260 DEG C, the main machine screw rotation speed is 180 r / min, the material strip is sent into a pelletizer under the traction of a traction machine, cooled and dried.

[0026] Example 2 A nylon 6 for bulking and texturing filament, raw materials of which include: 1000 g of caprolactam, 20 g of ethoxylated alkyl amine, 10 g of silicone master batch, 60 g of carbon fiber, 20 g of graphene oxide, 50 g of nano silicon dioxide, 20 g of sodium dodecyl sulfate, 50 g of thermotropic liquid crystal polymer, 30 g of polyether block amide, 20 g of titanate coupling agent TMC311, 15 g of Span 80, 10 g of talcum powder, 20 g of stearic acid, 20 g of KH-570 coupling agent and 20 g of antioxidant 1010.

[0027] The preparation method of the above-mentioned nylon 6 for bulking and texturing filament, comprising the following steps: S1, the carbon fiber is treated by low temperature plasma for 10 minutes, the low temperature plasma treatment power is 500 W, the low temperature plasma treatment working gas is air, and the working gas flow rate is 150 mL / min; then add graphene oxide, nano silicon dioxide and sodium dodecyl sulfate, mix and grind at a speed of 1200 r / min for 5 minutes to obtain a heat-conducting filler; S2, the thermotropic liquid crystal polymer, polyether block amide, titanate coupling agent TMC311 and caprolactam are mixed, stirred at a temperature of 150 DEG C for 10 minutes at a stirring speed of 450 r / min, the heat-conducting filler is added under stirring, added in 6 times and dispersed uniformly, reacted under nitrogen protection at a temperature of 240 DEG C for 2 h, the reaction pressure is 2 MPa, reacted under a vacuum degree of-0.08 MPa for 3 h, water-cooled to 50 DEG C, and granulated to obtain a composite base material; S3, the composite base is dried at a temperature of 110°C for 2h, and the following are added and uniformly mixed: Span 80, talcum powder, stearic acid, KH-570 coupling agent, antioxidant 1010, ethoxylated alkyl amine, and silicone masterbatch; the mixture is extruded using a double-screw extruder, the barrel temperature of the extruder is 280°C, the main screw rotation speed is 280r / min, the material strip is sent into a granulator under the traction of a traction machine, and then cooled and dried.

[0028] Example 3 A nylon 6 for bulking and texturing filaments, raw materials of which include: caprolactam 850g, ethoxylated alkyl amine 17g, silicone masterbatch 7g, carbon fiber 50g, graphene oxide 13g, nanosilica 40g, sodium dodecyl sulfate 12g, thermotropic liquid crystal polymer 40g, polyether block amide 15g, titanate coupling agent TMC311 18g, Span 80 8g, talcum powder 9g, stearic acid 13g, KH-570 coupling agent 18g, and antioxidant 1076 12g.

[0029] The preparation method of the nylon 6 for bulking and texturing filaments includes the following steps: S1, the carbon fiber is treated by low-temperature plasma for 9min, the low-temperature plasma treatment power is 350W, the low-temperature plasma treatment working gas is air, and the working gas flow rate is 130mL / min; then the graphene oxide, nanosilica, and sodium dodecyl sulfate are added and mixed and ground at a speed of 1050r / min for 4min to obtain a heat-conducting filler; S2, the thermotropic liquid crystal polymer, polyether block amide, titanate coupling agent TMC311, and caprolactam are mixed and stirred at a temperature of 130°C for 9min at a stirring speed of 380r / min, the heat-conducting filler is added and uniformly dispersed in the mixture in 5 times, and the mixture is reacted at a temperature of 250°C for 100min under nitrogen protection, the reaction pressure is 1.2MPa, the reaction is carried out at a vacuum degree of -0.075MPa for 140min, and the mixture is water-cooled to 48°C and granulated to obtain a composite base; S3, the composite base is dried at a temperature of 102°C for 100min, and the following are added and uniformly mixed: Span 80, talcum powder, stearic acid, KH-570 coupling agent, antioxidant 1076, ethoxylated alkyl amine, and silicone masterbatch; the mixture is extruded using a double-screw extruder, the barrel temperature of the extruder is 265°C, the main screw rotation speed is 240r / min, the material strip is sent into a granulator under the traction of a traction machine, and then cooled and dried.

[0030] Example 4 A kind of nylon 6 for bulking texturing filament, raw materials include: caprolactam 950g, ethoxylated alkyl amine 13g, silicone master particle 9g, carbon fiber 30g, graphene oxide 17g, nano silicon dioxide 20g, sodium dodecyl sulfate 18g, thermotropic liquid crystal polymer 20g, polyether block amide 25g, titanate coupling agent TMC311 12g, Span 80 12g, talc 7g, stearic acid 17g, KH-570 coupling agent 12g, antioxidant 1076 18g.

[0031] The preparation method of the above-mentioned nylon 6 for bulking texturing filament includes the following steps: S1, carbon fiber is treated by low temperature plasma for 7min, the low temperature plasma treatment power is 450W, the low temperature plasma treatment working gas is air, and the working gas flow rate is 110mL / min;Then add graphene oxide, nano silicon dioxide, sodium dodecyl sulfate, mix and grind at a speed of 1150r / min for 3min to obtain a heat-conducting filler; S2, thermotropic liquid crystal polymer, polyether block amide, titanate coupling agent TMC311 and caprolactam are mixed, stirred at a temperature of 140℃ for 7min, the stirring speed is 420r / min, the heat-conducting filler is added under stirring, and is added and dispersed uniformly in 4 times, reacts under nitrogen protection at a temperature of 250℃ for 80min, the reaction pressure is 1.8MPa, reacts at a vacuum degree of-0.065MPa for 160min, water-cooled to 42℃, and granulated to obtain a composite base material; S3, the composite base material is dried at a temperature of 108℃ for 80min, Span 80, talc, stearic acid, KH-570 coupling agent, antioxidant 1076, ethoxylated alkyl amine and silicone master particle are mixed uniformly, extruded by using a double screw extruder, the extruder barrel temperature is 275℃, the main machine screw rotation speed is 200r / min, the material strip is sent into the granulator under the traction of the traction machine, cooled and dried.

[0032] Example 5 A kind of nylon 6 for bulking texturing filament, raw materials include: caprolactam 900g, ethoxylated alkyl amine 15g, silicone master particle 8g, carbon fiber 40g, graphene oxide 15g, nano silicon dioxide 30g, sodium dodecyl sulfate 15g, thermotropic liquid crystal polymer 30g, polyether block amide 20g, titanate coupling agent TMC311 15g, Span 80 10g, talc 8g, stearic acid 15g, KH-570 coupling agent 15g, antioxidant 1076 15g.

[0033] The preparation method of the above-mentioned nylon 6 for bulking texturing filament includes the following steps: S1, the carbon fiber is treated by low temperature plasma for 8 minutes, the low temperature plasma treatment power is 400 W, the low temperature plasma treatment working gas is air, and the working gas flow rate is 120 mL / min;Then add graphene oxide, nano silicon dioxide, and sodium dodecyl sulfate, mix and grind at a speed of 1100 r / min for 3.5 min to obtain a heat-conducting filler; S2, the thermotropic liquid crystal polymer, polyether block amide, titanate coupling agent TMC311 and caprolactam are mixed, stirred at a temperature of 135 DEG C for 8 min, the stirring speed is 400 r / min, the heat-conducting filler is added under stirring, and is uniformly dispersed by 6 times, and is reacted under nitrogen protection at a temperature of 245 DEG C for 90 min, the reaction pressure is 1.5 MPa, the vacuum degree is-0.07 MPa, and the reaction time is 150 min, and the water is cooled to 45 DEG C, and the granulation is obtained to obtain a composite base material; S3, the composite base material is dried at a temperature of 105 DEG C for 90 min, and the silicone master batch, span 80, talcum powder, stearic acid, KH-570 coupling agent, antioxidant 1076, ethoxylated alkyl amine and silicone master batch are uniformly mixed, and are extruded by a double screw extruder, the barrel temperature of the extruder is 265 DEG C, the main screw rotation speed is 220 r / min, the material strip is sent into the pelletizer under the traction of the traction machine, and is cooled and dried.

[0034] Comparative example 1 A nylon 6 for bulking and texturing filament, which comprises: caprolactam 900 g, ethoxylated alkyl amine 15 g, silicone master batch 8 g, carbon fiber 40 g, graphene oxide 15 g, nano silicon dioxide 30 g, sodium dodecyl sulfate 15 g, thermotropic liquid crystal polymer 30 g, polyether block amide 20 g, titanate coupling agent TMC311 15 g, span 80 10 g, talcum powder 8 g, stearic acid 15 g, KH-570 coupling agent 15 g, and antioxidant 1076 15 g.

[0035] The preparation method of the above-mentioned nylon 6 for bulking and texturing filament comprises the following steps: S1, the thermotropic liquid crystal polymer, polyether block amide, titanate coupling agent TMC311 and caprolactam are mixed, stirred at a temperature of 135 DEG C for 8 min, the stirring speed is 400 r / min, the heat-conducting filler is added under stirring, and is uniformly dispersed by 6 times, and is reacted under nitrogen protection at a temperature of 245 DEG C for 90 min, the reaction pressure is 1.5 MPa, the vacuum degree is-0.07 MPa, and the reaction time is 150 min, and the water is cooled to 45 DEG C, and the granulation is obtained to obtain a composite base material; S2, the composite base is dried at a temperature of 105℃ for 90 min, and the following are added and uniformly mixed: Span 80, talcum powder, stearic acid, KH-570 coupling agent, antioxidant 1076, ethoxylated alkyl amine, and silicone master batch; the mixture is extruded using a double-screw extruder, the barrel temperature of the extruder is 265℃, the main screw rotation speed is 220 r / min, the material strip is sent into a granulator under the traction of a traction machine, and then cooled and dried.

[0036] Comparative Example 2 A nylon 6 for bulking and texturing filaments, raw materials of which include: 900 g of caprolactam, 15 g of ethoxylated alkyl amine, 8 g of silicone master batch, 40 g of carbon fiber, 15 g of graphene oxide, 30 g of nano-silicon dioxide, 15 g of sodium dodecyl sulfate, 30 g of thermotropic liquid crystal polymer, 20 g of polyether block amide, 15 g of titanate coupling agent TMC311, 10 g of Span 80, 8 g of talcum powder, 15 g of stearic acid, 15 g of KH-570 coupling agent, and 15 g of antioxidant 1076.

[0037] The method for preparing the nylon 6 for bulking and texturing filaments includes the following steps: S1, the carbon fiber is treated by low-temperature plasma for 8 min, the low-temperature plasma treatment power is 400 W, the low-temperature plasma treatment working gas is air, and the working gas flow rate is 120 mL / min; then the graphene oxide and sodium dodecyl sulfate are added and mixed and ground at a speed of 1100 r / min for 3.5 min to obtain a heat-conducting filler; S2, the thermotropic liquid crystal polymer, the polyether block amide, the titanate coupling agent TMC311, and the caprolactam are mixed and stirred at a temperature of 135℃ for 8 min at a stirring speed of 400 r / min, the heat-conducting filler is added and uniformly dispersed in the mixture in 6 times, and the mixture is reacted under nitrogen protection at a temperature of 245℃ for 90 min under a reaction pressure of 1.5 MPa, reacted under a vacuum degree of -0.07 MPa for 150 min, and then water-cooled to 45℃ to obtain a composite base after granulation; S3, the composite base is dried at a temperature of 105℃ for 90 min, and the following are added and uniformly mixed: Span 80, nano-silicon dioxide, talcum powder, stearic acid, KH-570 coupling agent, antioxidant 1076, ethoxylated alkyl amine, and silicone master batch; the mixture is extruded using a double-screw extruder, the barrel temperature of the extruder is 265℃, the main screw rotation speed is 220 r / min, the material strip is sent into a granulator under the traction of a traction machine, and then cooled and dried.

[0038] The nylon 6 materials obtained in Example 5 and Comparative Examples 1-2 are subjected to spinning (melt spinning / electrospinning) test, and the results show that the nylon 6 materials in each group can be easily spun.

[0039] The nylon 6 material obtained in Example 5 and Comparative Examples 1-2 was injection molded, and the tensile strength of each of the injection molded samples was determined according to ASTM D638, with a tensile speed of 5 mm / min. The notched Izod impact strength of the nylon 6 material obtained in Example 5 and Comparative Examples 1-2 was determined according to ASTM D256, with a sample size of 127 mm x 13 mm x 3.2 mm, a V-shaped notch, and a notch depth of 1 / 5.

[0040] As shown in Table 1, the tensile strength and notched Izod impact strength of the nylon 6 material obtained in Example 5 were the largest, and were significantly better than those of the comparative examples. Figure 1

[0041] The thermal conductivity of the nylon 6 material obtained in Example 5 and Comparative Examples 1-2 was determined according to ASTM C177.

[0042] 5 mg of the nylon 6 material obtained in Example 5 and Comparative Examples 1-2 was taken, and thermal performance testing was performed in a thermal gravimetric analyzer, with nitrogen as the testing atmosphere, a temperature increase rate of 10°C / min, and the temperature at which 5% mass loss was taken as the thermal decomposition temperature.

[0043] As shown in Table 1, the thermal conductivity and thermal decomposition temperature of the nylon 6 material obtained in Example 5 were the largest, and were significantly better than those of the comparative examples. Figure 2

[0044] The above merely describes preferred specific embodiments of the present application, but the protection scope of the present application is not limited thereto, and any person of ordinary skill in the art, according to the technical solution and inventive concept of the present application, can make equivalent replacements or changes within the technical range disclosed by the present application, which should be encompassed within the protection scope of the present application.​​

Claims

1. A type of nylon 6 for expanded textured filaments, characterized in that, The raw materials, by weight, include: 80-100 parts caprolactam, 1-2 parts ethoxylated alkylamine, 0.5-1 parts silicone masterbatch, 2-6 parts carbon fiber, 1-2 parts graphene oxide, 1-5 parts nano silica, 1-2 parts dispersant, 1-5 parts thermotropic liquid crystal polymer, 1-3 parts polyether block amide, 1-2 parts compatibilizer, 0.5-1.5 parts sorbitol surfactant, 0.5-1 part talc, 1-2 parts stearic acid, 1-2 parts silane coupling agent, and 1-2 parts antioxidant.

2. The nylon 6 for expanded textured filaments according to claim 1, characterized in that, The aspect ratio of carbon fiber is 5-10:1000-6000.

3. The nylon 6 for expanded textured filaments according to claim 1, characterized in that, The dispersant is sodium dodecyl sulfate.

4. The nylon 6 for expanded textured filaments according to claim 1, characterized in that, The compatibilizer is titanate coupling agent TMC311.

5. The nylon 6 for expanded textured filaments according to claim 1, characterized in that, Sorbitol surfactants are sorbitan monooleate.

6. The nylon 6 for expanded textured filaments according to claim 1, characterized in that, The silane coupling agent is KH-570 coupling agent.

7. The nylon 6 for expanded textured filaments according to claim 1, characterized in that, The antioxidant is antioxidant 1076 or / and antioxidant 1010.

8. A method for preparing nylon 6 for expanded textured filaments as described in any one of claims 1-7, characterized in that, Includes the following steps: S1. The carbon fiber is subjected to low-temperature plasma treatment for 5-10 minutes, and then graphene oxide, nano-silica and dispersant are added and mixed and ground for 2-5 minutes to obtain a thermally conductive filler. S2. Mix the thermotropic liquid crystal polymer, polyether block amide, compatibilizer, and caprolactam, stir at 120-150℃ for 5-10 min, add the thermally conductive filler while stirring, react at 220-260℃ for 1-2 h under nitrogen protection, adjust the vacuum to -0.06~-0.08MPa and react for 2-3 h, cool with water to 40-50℃, and granulate to obtain the composite matrix. S3. Dry the composite base material for 1-2 hours, add sorbitol surfactant, talc, stearic acid, silane coupling agent, antioxidant, ethoxylated alkylamine, and silicone masterbatch, mix evenly, extrude, cool, and dry.

9. The method for preparing nylon 6 for expanded textured filaments according to claim 8, characterized in that, In S1, the power of the low-temperature plasma treatment is 300-500W, the working gas for the low-temperature plasma treatment is air, and the working gas flow rate is 100-150mL / min.

10. The method for preparing nylon 6 for expanded textured filaments according to claim 8, characterized in that, In S2, during the reaction at 220-260℃ under nitrogen protection, the reaction pressure is maintained at 1-2 MPa.

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