Long-acting antibacterial nylon material and preparation method thereof

Abstract

The invention relates to a long-acting antibacterial nylon material and a preparation method thereof, and belongs to the technical field of high polymer materials. The preparation method comprises the following steps: firstly, carrying out amino modification on glass fibers, and then carrying out Schiff base reaction on the amino modified glass fibers and aldehyde groups in 2-trifluoromethylpyridine-4-formaldehyde bromide, so that a large amount of Schiff bases, indolone structures and trifluoromethylpyridine structures are grafted on the surfaces of the glass fibers; the Schiff base, the indolone structure and the trifluoromethylpyridine structure not only can effectively improve the affinity of the glass fiber to nylon and the dispersion uniformity of the glass fiber in a nylon matrix, but also can play a synergistic role, so that the antibacterial effect and the long-acting antibacterial property of the material are improved. Maleic anhydride grafted polyethylene is adopted as a toughening agent, the toughness of the material can be improved, acid anhydride can react with secondary amine in an indolone structure grafted to the surfaces of the glass fibers in the melt extrusion process, and the combination compactness, fastness and long-acting antibacterial property of the glass fibers in a material matrix are improved.

Description

TECHNICAL FIELD

[0001] The application relates to a long-acting antibacterial nylon material and a preparation method thereof, and belongs to the technical field of high polymer materials. BACKGROUND

[0002] Nylon is a general term of thermoplastic resins containing repeating amide groups [-NHCO] in the molecular main chain. The molecular chain of nylon 6 contains amide groups and terminal groups of carboxyl and amino groups. Nylon 6 has the following characteristics: excellent wear resistance and self-lubricity; nylon 6 has a small friction coefficient and good self-lubricity; high mechanical strength, large intermolecular force, high mechanical strength and elastic modulus; excellent chemical resistance, good chemical stability of nylon 6, especially good oil resistance; good heat resistance and electrical insulation, and high resistivity of nylon 6, and excellent heat resistance. At present, nylon 6 is mainly applied to the chemical fiber industry and the engineering plastic industry.

[0003] With the rapid development of miniaturization and greenization of automobiles and high performance of electronic and electrical equipment, nylon is widely used in the automobile field as a main structural material. In addition, in recent years, with the rapid development of new energy vehicles, the application of nylon in new energy batteries, connectors, charging devices and other components has also rapidly increased. In order to better meet the needs of the development of the automobile industry, relevant scholars and experts have proposed that the future development trend of the nylon material for vehicles is to increase the flowability, heat resistance, high-pressure marking resistance and halogen-free flame retardant properties of the nylon material. However, for automobile interior parts, in addition to the strength and toughness of the material, with the increasing emphasis on health, the antibacterial property of the material has also been paid more and more attention.

[0004] At present, the antibacterial property of nylon material is mainly improved by adding an antibacterial agent, but this method can only ensure that the nylon material has a certain antibacterial property in the short term. With the aging of the material, the compatibility of the antibacterial agent in the nylon material becomes poor, decomposition occurs, and the long-acting antibacterial property is poor. SUMMARY

[0005] The application aims to provide a long-acting antibacterial nylon material and a preparation method thereof, so as to solve the problem that the antibacterial property of the current antibacterial nylon material is easily poor after aging.

[0006] The application provides a long-acting antibacterial nylon material, which comprises nylon, Schiff base modified glass fiber and maleic anhydride grafted polyethylene; the Schiff base modified glass fiber is prepared by Schiff base reaction of amino modified glass fiber and 2-trifluoromethylpyridine-4-formaldehyde bromide, and the 2-trifluoromethylpyridine-4-formaldehyde bromide is prepared by quaternary ammonium salt reaction of pyridine nitrogen atoms in 2-trifluoromethylpyridine-4-formaldehyde and bromine atoms in 4-(2-bromoethyl)-2-indole ketone.

[0007] Preferably, the preparation method of the amino-modified glass fiber is as follows: glass fiber, γ-aminopropyltrimethoxysilane, ethanol and water are mixed and heated to react, thereby obtaining amino-modified glass fiber.

[0008] Preferably, the mass ratio of the glass fiber, γ-aminopropyltrimethoxysilane, ethanol and water is 1:0.7~0.9:60~70:5~8; the temperature of the mixed heating reaction is 95~100℃ and the time is 10~12h.

[0009] Preferably, the molar ratio of 2-trifluoromethylpyridine-4-carboxaldehyde and 4-(2-bromoethyl)-2-indolone is 1:1.

[0010] Preferably, the quaternary ammonium salt reaction is carried out at a temperature of 75-80°C for 6-8 hours.

[0011] Preferably, the mass ratio of the amino-modified glass fiber to 2-trifluoromethylpyridine-4-carboxaldehyde bromide is 1:1.2~1.5.

[0012] Preferably, triethylamine is used as a catalyst in the Schiff base reaction, and the mass ratio of amino-modified glass fiber, 2-trifluoromethylpyridine-4-carboxaldehyde bromide and triethylamine is 1:1.2~1.5:0.03~0.05.

[0013] Preferably, ethanol is used as the solvent for the Schiff base reaction, and the reaction is carried out under reflux conditions for 12-15 hours.

[0014] Preferably, the long-lasting antibacterial nylon material comprises the following components in parts by weight: 55-65 parts nylon, 28-32 parts Schiff base modified glass fiber, and 8-10 parts maleic anhydride grafted polyethylene.

[0015] A method for preparing a long-lasting antibacterial nylon material as described above includes the following steps: mixing nylon, Schiff base modified glass fiber and maleic anhydride grafted polyethylene in a certain proportion and then performing melt extrusion to obtain the long-lasting antibacterial nylon material.

[0016] The beneficial effects of this invention are as follows: (1) The present invention first modifies the glass fiber with amino groups, and then reacts the amino-modified glass fiber with the aldehyde group in 2-trifluoromethylpyridine-4-carboxaldehyde bromide with a Schiff base reaction, thereby grafting a large number of Schiff base, indole ketone and trifluoromethylpyridine structures onto the surface of the glass fiber. The Schiff base, indole ketone and trifluoromethylpyridine structures can not only effectively improve the affinity of the glass fiber to nylon and the uniformity of dispersion in the nylon matrix, but also play a synergistic role to improve the antibacterial effect and long-lasting antibacterial properties of the material.

[0017] (2) In this invention, amino-modified glass fiber and 2-trifluoromethylpyridine-4-carboxaldehyde bromide are subjected to a Schiff base reaction in a solvent, which can effectively improve the conversion rate of the reaction and avoid the occurrence of side reactions caused by directly melting and extruding amino-modified glass fiber and 2-trifluoromethylpyridine-4-carboxaldehyde bromide.

[0018] (3) The present invention uses maleic anhydride-grafted polyethylene as a toughening agent, which can not only improve the toughness of the material, but also the anhydride group therein can react with the secondary amine in the indole ketone structure grafted on the surface of the glass fiber during the melt extrusion process, thereby improving the bonding tightness and strength of the glass fiber in the material matrix, and thus improving the long-term antibacterial properties of the material.

[0019] (4) In addition to having good antibacterial properties and long-lasting antibacterial properties, the long-lasting antibacterial nylon material of the present invention also has good mechanical properties and good market application prospects. Detailed Implementation

[0020] The following examples are intended to further illustrate the content of the present invention, rather than to limit the scope of protection of the present invention.

[0021] The commercially available PA6 used in the following examples and comparative examples is from the same batch of products manufactured by the same company. Example 1

[0022] The long-lasting antibacterial nylon material of this embodiment comprises the following components in parts by weight: 55 parts nylon, 28 parts Schiff base modified glass fiber, and 8 parts maleic anhydride grafted polyethylene.

[0023] The nylon used is commercially available PA6. The preparation method of Schiff base modified glass fiber is as follows: Glass fiber, γ-aminopropyltrimethoxysilane, ethanol, and deionized water in a mass ratio of 1:0.7:60:5 are added to a reaction vessel, then heated to 95°C and stirred under reflux for 10 hours. After cooling to room temperature, the mixture is filtered, and the filter cake is washed with acetone and deionized water and dried to obtain amino-modified glass fiber. Then, amino-modified glass fiber, 2-trifluoromethylpyridine-4-carboxaldehyde bromide, triethylamine, and anhydrous ethanol in a mass ratio of 1:1.2:0.03:55 are added to a reaction vessel, heated to reflux, and stirred under reflux for 1 hour. After cooling to room temperature for 2 hours, the mixture was filtered. The filter cake was washed successively with acetone, ethanol, and deionized water, and dried to obtain Schiff base modified glass fiber. The preparation method of 2-trifluoromethylpyridine-4-carboxaldehyde bromide is as follows: 2-trifluoromethylpyridine-4-carboxaldehyde and 4-(2-bromoethyl)-2-indolone were added to a reaction vessel in a molar ratio of 1:1. Then, methyl isobutyl ketone (the mass of methyl isobutyl ketone was 7 times the mass of 2-trifluoromethylpyridine-4-carboxaldehyde) was added. Nitrogen gas was introduced into the reaction vessel, and after stirring evenly, the mixture was heated to 75°C and stirred for 6 hours. The solvent was removed by vacuum distillation to obtain 2-trifluoromethylpyridine-4-carboxaldehyde bromide. Example 2

[0024] The long-lasting antibacterial nylon material of this embodiment comprises the following components in parts by weight: 60 parts nylon, 30 parts Schiff base modified glass fiber, and 9 parts maleic anhydride grafted polyethylene.

[0025] The nylon used is commercially available PA6. The preparation method of Schiff base modified glass fiber is as follows: Glass fiber, γ-aminopropyltrimethoxysilane, ethanol, and deionized water in a mass ratio of 1:0.8:65:7 are added to a reaction vessel, then heated to 98℃ and stirred under reflux for 11 hours. After cooling to room temperature, the mixture is filtered, and the filter cake is washed with acetone and deionized water and dried to obtain amino-modified glass fiber. Then, amino-modified glass fiber, 2-trifluoromethylpyridine-4-carboxaldehyde bromide, triethylamine, and anhydrous ethanol in a mass ratio of 1:1.3:0.04:58 are added to a reaction vessel, heated to reflux, and stirred under reflux for 1 hour. After cooling to room temperature for 3 hours, the mixture was filtered. The filter cake was washed successively with acetone, ethanol, and deionized water, and dried to obtain Schiff base modified glass fiber. The preparation method of 2-trifluoromethylpyridine-4-carboxaldehyde bromide is as follows: 2-trifluoromethylpyridine-4-carboxaldehyde and 4-(2-bromoethyl)-2-indolone were added to a reaction vessel in a molar ratio of 1:1. Then, methyl isobutyl ketone (the mass of methyl isobutyl ketone was 8 times the mass of 2-trifluoromethylpyridine-4-carboxaldehyde) was added. Nitrogen gas was introduced into the reaction vessel, and after stirring evenly, the mixture was heated to 78°C and stirred for 7 hours. The solvent was removed by vacuum distillation to obtain 2-trifluoromethylpyridine-4-carboxaldehyde bromide. Example 3

[0026] The long-lasting antibacterial nylon material of this embodiment comprises the following components in parts by weight: 65 parts nylon, 32 parts Schiff base modified glass fiber, and 10 parts maleic anhydride grafted polyethylene.

[0027] The nylon used is commercially available PA6. The preparation method of Schiff base modified glass fiber is as follows: Glass fiber, γ-aminopropyltrimethoxysilane, ethanol, and deionized water in a mass ratio of 1:0.9:70:8 are added to a reaction vessel, then heated to 100℃ and stirred under reflux for 12 hours. After cooling to room temperature, the mixture is filtered, and the filter cake is washed with acetone and deionized water and dried to obtain amino-modified glass fiber. Then, amino-modified glass fiber, 2-trifluoromethylpyridine-4-carboxaldehyde bromide, triethylamine, and anhydrous ethanol in a mass ratio of 1:1.5:0.05:60 are added to the reaction vessel, heated to reflux, and stirred under reflux conditions. After 15 hours, the mixture was cooled to room temperature and filtered. The filter cake was washed successively with acetone, ethanol, and deionized water, and dried to obtain Schiff base modified glass fiber. The preparation method of 2-trifluoromethylpyridine-4-carboxaldehyde bromide is as follows: 2-trifluoromethylpyridine-4-carboxaldehyde and 4-(2-bromoethyl)-2-indolone were added to a reaction vessel in a molar ratio of 1:1. Then, methyl isobutyl ketone (the mass of methyl isobutyl ketone was 9 times the mass of 2-trifluoromethylpyridine-4-carboxaldehyde) was added. Nitrogen gas was introduced into the reaction vessel, and after stirring evenly, the mixture was heated to 80°C and stirred for 8 hours. The solvent was removed by vacuum distillation to obtain 2-trifluoromethylpyridine-4-carboxaldehyde bromide.

[0028] Comparative Example 1 The only difference between the long-lasting antibacterial nylon material in this comparative example and the long-lasting antibacterial nylon material in Example 1 is that the preparation method of 2-trifluoromethylpyridine-4-carboxaldehyde bromide used in this comparative example is as follows: 2-trifluoromethylpyridine-4-carboxaldehyde and bromobutane in a molar ratio of 1:1 are added to a reaction vessel, and then methyl isobutyl ketone (the mass of methyl isobutyl ketone is 7 times the mass of 2-trifluoromethylpyridine-4-carboxaldehyde) is added. Nitrogen gas is introduced into the reaction vessel, and after stirring evenly, it is heated to 75°C and stirred for 6 hours. The solvent is removed by vacuum distillation to obtain 2-trifluoromethylpyridine-4-carboxaldehyde bromide.

[0029] Comparative Example 2 The only difference between the long-lasting antibacterial nylon material in this comparative example and the long-lasting antibacterial nylon material in Example 1 is that the preparation method of 2-trifluoromethylpyridine-4-carboxaldehyde bromide used in this comparative example is as follows: 2-trifluoromethylpyridine-4-carboxaldehyde and 1-(2-bromoethyl)pyrrole in a molar ratio of 1:1 are added to a reaction vessel, and then methyl isobutyl ketone (the mass of methyl isobutyl ketone is 7 times the mass of 2-trifluoromethylpyridine-4-carboxaldehyde) is added. Nitrogen gas is introduced into the reaction vessel, and after stirring evenly, it is heated to 75°C and stirred for 6 hours. The solvent is removed by vacuum distillation to obtain 2-trifluoromethylpyridine-4-carboxaldehyde bromide.

[0030] Comparative Example 3 The only difference between the long-lasting antibacterial nylon material in this comparative example and the long-lasting antibacterial nylon material in Example 1 is that the preparation method of 2-trifluoromethylpyridine-4-carboxaldehyde bromide used in this comparative example is as follows: 2-trifluoromethylpyridine-4-carboxaldehyde and 2-(4-bromophenyl)pyrrolidine in a molar ratio of 1:1 are added to a reaction vessel, and then methyl isobutyl ketone (the mass of methyl isobutyl ketone is 7 times the mass of 2-trifluoromethylpyridine-4-carboxaldehyde) is added. Nitrogen gas is introduced into the reaction vessel, and after stirring evenly, it is heated to 75°C and stirred for 6 hours. The solvent is removed by vacuum distillation to obtain 2-trifluoromethylpyridine-4-carboxaldehyde bromide.

[0031] Comparative Example 4 The only difference between the long-lasting antibacterial nylon material in this comparative example and the long-lasting antibacterial nylon material in Example 1 is that the preparation method of 2-trifluoromethylpyridine-4-carboxaldehyde bromide used in this comparative example is as follows: 2-trifluoromethylpyridine-4-carboxaldehyde and 2-(2-bromoethyl)benzimidazole in a molar ratio of 1:1 are added to a reaction vessel, and then methyl isobutyl ketone (the mass of methyl isobutyl ketone is 7 times the mass of 2-trifluoromethylpyridine-4-carboxaldehyde) is added. Nitrogen gas is introduced into the reaction vessel, and after stirring evenly, it is heated to 75°C and stirred for 6 hours. The solvent is removed by vacuum distillation to obtain 2-trifluoromethylpyridine-4-carboxaldehyde bromide.

[0032] Comparative Example 5 The only difference between the long-lasting antibacterial nylon material in this comparative example and the long-lasting antibacterial nylon material in Example 1 is that the preparation method of 2-trifluoromethylpyridine-4-carboxaldehyde bromide used in this comparative example is as follows: 2-trifluoromethylpyridine-4-carboxaldehyde and 3-(2-bromoethyl)indole in a molar ratio of 1:1 are added to a reaction vessel, and then methyl isobutyl ketone (the mass of methyl isobutyl ketone is 7 times the mass of 2-trifluoromethylpyridine-4-carboxaldehyde) is added. Nitrogen gas is introduced into the reaction vessel, and after stirring evenly, it is heated to 75°C and stirred for 6 hours. The solvent is removed by vacuum distillation to obtain 2-trifluoromethylpyridine-4-carboxaldehyde bromide.

[0033] Comparative Example 6 The only difference between the long-lasting antibacterial nylon material in this comparative example and the long-lasting antibacterial nylon material in Example 1 is that 2-trifluoromethylpyridine-4-carboxaldehyde bromide is replaced with 4-pyridinecarboxaldehyde bromide in this comparative example. The preparation method of 4-pyridinecarboxaldehyde bromide is as follows: 4-pyridinecarboxaldehyde and 4-(2-bromoethyl)-2-indolone in a molar ratio of 1:1 are added to a reaction vessel, and then methyl isobutyl ketone (the mass of methyl isobutyl ketone is 7 times the mass of 4-pyridinecarboxaldehyde) is added. Nitrogen gas is introduced into the reaction vessel, and after stirring evenly, it is heated to 75°C and stirred for 6 hours. The solvent is removed by vacuum distillation to obtain 4-pyridinecarboxaldehyde bromide.

[0034] Comparative Example 7 The only difference between the long-lasting antibacterial nylon material in this comparative example and the long-lasting antibacterial nylon material in Example 1 is that the Schiff base modified glass fiber in this comparative example is replaced with a composition of amino modified glass fiber and 2-trifluoromethylpyridine-4-carboxaldehyde bromide in a mass ratio of 1:0.5.

[0035] Comparative Example 8 The only difference between the long-lasting antibacterial nylon material in this comparative example and the long-lasting antibacterial nylon material in Example 1 is that maleic anhydride-grafted polyethylene is replaced with maleic anhydride-grafted EPDM rubber as a toughening agent in the long-lasting antibacterial nylon material in this comparative example.

[0036] Example of effect To evaluate the comprehensive performance of the antibacterial nylon materials in each embodiment and comparative example, the raw materials were added to a twin-screw extruder according to the composition ratio of the long-lasting antibacterial nylon materials in each embodiment and comparative example, and melt-extruded at 260°C to obtain the antibacterial nylon materials. Then, the tensile strength was tested according to the method in standard ISO 527, the elongation at break was tested according to the method in standard ISO 527-2, the notched impact strength of a simply supported beam was tested according to the method in standard ISO 179-1, and the antibacterial property was tested according to the method in standard QB / T2591-2003, with Escherichia coli as the test strain. Finally, the prepared antibacterial nylon materials were cut into samples of the same size and then placed in an artificial ultraviolet aging chamber for aging. When the aging time reached the set value, they were taken out and then the antibacterial rate was tested according to the method in standard QB / T2591-2003, with Escherichia coli as the test strain. The antibacterial long-lasting effect of the antibacterial nylon materials after aging was evaluated by the antibacterial rate of the antibacterial nylon materials. The tensile strength, elongation at break, notched impact strength of simply supported beam, antibacterial properties, and antibacterial long-term effects of the antibacterial nylon materials in each embodiment and comparative example are shown in Table 1.

[0037] Table 1 Tensile strength and fracture strength of antibacterial nylon materials Elongation at break, impact strength, antibacterial properties and long-lasting antibacterial effect

[0038] As shown in Table 1, the long-lasting antibacterial nylon material of the present invention has good mechanical properties, antibacterial effect and long-lasting antibacterial properties, which can meet the requirements of the automotive materials field.

[0039] As shown in Example 1 and Comparative Examples 1-5, the structure of the brominated compound used in the preparation of 2-trifluoromethylpyridine-4-carboxaldehyde bromide affects the performance of Schiff base-modified glass fibers and the final antibacterial nylon material. When 4-(2-bromoethyl)-2-indolone is used as the bromide to prepare 2-trifluoromethylpyridine-4-carboxaldehyde bromide, both Schiff base and indolone structures can be introduced onto the surface of the Schiff base-modified glass fiber. These structures not only improve the oleophilicity of the glass fiber surface and its compatibility with nylon, but also work synergistically to enhance the antibacterial effect and long-lasting antibacterial properties of the material. However, when the indolone structure is replaced with butyl, pyrrole, phenylpyrrolidine, benzimidazole, or indole structures, the compatibility of the modified glass fiber with the nylon matrix, its dispersion uniformity within the nylon matrix, and its antibacterial effect all deteriorate.

[0040] As can be seen from Example 1 and Comparative Example 6, after removing the trifluoromethyl group from 2-trifluoromethylpyridine-4-carboxaldehyde bromide, the mechanical properties, antibacterial effect, and long-lasting antibacterial properties of the material deteriorate. This indicates that the trifluoromethyl group can work together with the Schiff base structure and the indole ketone structure to improve the oleophilicity of the glass fiber surface, the compatibility with nylon, and the antibacterial effect.

[0041] As can be seen from Example 1 and Comparative Example 7, when Schiff base modified glass fiber is replaced with a composition of amino modified glass fiber and 2-trifluoromethylpyridine-4-carboxaldehyde bromide, although the amino modified glass fiber and 2-trifluoromethylpyridine-4-carboxaldehyde bromide in the composition can undergo Schiff base reaction during melt extrusion, the system is a solid-phase reaction and has a large number of components, which easily leads to incomplete reaction and side reactions, resulting in poor modification effect of glass fiber.

[0042] As can be seen from Example 1 and Comparative Example 8, when maleic anhydride-grafted polyethylene is replaced with maleic anhydride-grafted EPDM rubber as a toughening agent, the antibacterial nylon material lacks polyethylene segments while increasing EPDM rubber segments. However, the EPDM rubber segments contain unsaturated double bonds, which may have a conjugation effect with the Schiff base structure on the surface of the Schiff base-modified glass fiber, leading to entanglement and aggregation of the glass fiber and EPDM rubber segments, resulting in a decrease in material performance.

Claims

1. A long-lasting antimicrobial nylon material, characterized in that, The long-acting antibacterial nylon material comprises nylon, Schiff base modified glass fiber and maleic anhydride grafted polyethylene; the Schiff base modified glass fiber is prepared by Schiff base reaction of amino modified glass fiber and 2-trifluoromethylpyridine-4-formaldehyde bromide, and the 2-trifluoromethylpyridine-4-formaldehyde bromide is prepared by quaternary ammonium salt reaction of pyridine nitrogen atoms in 2-trifluoromethylpyridine-4-formaldehyde and bromine atoms in 4-(2-bromoethyl)-2-indole ketone.

2. The long-lasting antimicrobial nylon material of claim 1, wherein, The preparation method of the amino modified glass fiber is as follows: the glass fiber, gamma-aminopropyltrimethoxysilane, ethanol and water are mixed and heated to react to obtain the amino modified glass fiber.

3. The long-lasting antimicrobial nylon material of claim 1, wherein, The mass ratio of the glass fiber, gamma-aminopropyltrimethoxysilane, ethanol and water is 1:0.7-0.9:60-70:5-8; the temperature of the mixed heating reaction is 95-100 DEG C, and the time is 10-12 h.

4. The long-lasting antimicrobial nylon material of claim 1, wherein, The molar ratio of the 2-trifluoromethylpyridine-4-formaldehyde and 4-(2-bromoethyl)-2-indole ketone is 1:

1.

5. The long-lasting antimicrobial nylon material of claim 1, wherein, The temperature of the quaternary ammonium salt reaction is 75-80 DEG C, and the time is 6-8 h.

6. The long-lasting antimicrobial nylon material of claim 1, wherein, The mass ratio of the amino modified glass fiber and 2-trifluoromethylpyridine-4-formaldehyde bromide is 1:1.2-1.

5.

7. The long-lasting antimicrobial nylon material of claim 1, wherein, Triethylamine is used as a catalyst in the Schiff base reaction, and the mass ratio of the amino modified glass fiber, 2-trifluoromethylpyridine-4-formaldehyde bromide and triethylamine is 1:1.2-1.5:0.03-0.

05.

8. The long-lasting antimicrobial nylon material of claim 1, wherein, Ethanol is used as a solvent in the Schiff base reaction, and the reaction is carried out under refluxing condition, and the time is 12-15 h.

9. The long-lasting antimicrobial nylon material of claim 1, wherein, The long-acting antibacterial nylon material comprises the following components in mass fraction: nylon 55-65 parts, Schiff base modified glass fiber 28-32 parts and maleic anhydride grafted polyethylene 8-10 parts.

10. A method of preparing the long-lasting antimicrobial nylon material according to any one of claims 1-9, characterized in that, The long-acting antibacterial nylon material is obtained by melt extrusion after mixing the nylon, Schiff base modified glass fiber and maleic anhydride grafted polyethylene according to the proportion.

Images