Polyethylene antistatic flame-retardant double-resistant master batch and preparation method thereof

Abstract

The invention relates to the technical field of high polymer materials, in particular to a polyethylene antistatic flame-retardant double-resistant master batch and a preparation method of the polyethylene antistatic flame-retardant double-resistant master batch. Comprising the following raw materials: 50-60 parts of polyethylene, 30-35 parts of a flame retardant, 9-11 parts of modified carbon black, 0.6-1 part of a lubricant and 0.3-0.5 part of an antioxidant. The polyethylene master batch prepared by the invention has the advantages of high flame retardance, good antistatic property and excellent mechanical properties.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of high polymer materials, and particularly relates to a polyethylene antistatic flame-retardant double-resistant master batch and a preparation method thereof. BACKGROUND

[0002] Polyethylene (PE) is a kind of general-purpose thermoplastic polymer material, which is widely used in packaging film, electronic component shell, wire and cable insulation layer, automotive interior parts and many other fields due to its excellent chemical stability, impact resistance and processing fluidity. However, the polyethylene molecular structure lacks polar groups, and the surface resistance is high. In the process of processing and use, static electricity is easily accumulated due to friction, induction and other effects. These static charges not only attract dust and impurities in the environment, affecting the appearance and cleanliness of the product, but also may produce electric sparks when discharging, especially in flammable and explosive scenes such as electronic manufacturing and petrochemical industry, which may cause fire and explosion.

[0003] At present, there are related researches on the flame-retardant modification of polyethylene in the industry. For example, patent CN116903962B discloses a composite flame-retardant master batch and its application. The composite flame-retardant master batch contains the following components by mass: base resin 50-80 parts, modified flame retardant 10-30 parts, modified silicon dioxide 5-20 parts, dispersant 0.5-3 parts. The composite flame-retardant master batch provided by the application not only has good flame-retardant performance, but also has good tensile strength and excellent mechanical properties under the condition of maintaining good haze and high light transmittance. Patent CN117363031B discloses a phosphorus-containing flame-retardant master batch and a preparation method thereof. The phosphorus-containing flame-retardant master batch is composed of modified polyalphaolefin, auxiliary additive, flame-retardant additive and crosslinking agent in a use amount ratio of 10g:2g:8g:1.5g. The invention prepares a phosphorus-containing flame-retardant master batch with synergistic effect by blending modified polyalphaolefin, auxiliary additive, flame-retardant additive and crosslinking agent. The phosphorus-containing flame-retardant master batch is applied in polypropylene material, which can effectively improve the thermal decomposition temperature and flame-retardant performance of the polypropylene material, and can also improve the mechanical properties of the polypropylene material. The prepared phosphorus-containing flame-retardant master batch is more suitable for improving the flame-retardant performance and mechanical properties of polypropylene. However, there are relatively few studies on the combination of antistatic performance and flame-retardant performance. The antistatic agent and the flame-retardant agent are directly compounded and added to the polyethylene matrix. However, due to the large difference in chemical properties and polarity between the antistatic agent and the flame-retardant agent, the two are prone to uneven dispersion and mutual repulsion in the polyethylene matrix. Not only can the antistatic and flame-retardant properties not be synergistically improved, but the mechanical properties and processing properties of the material may be further deteriorated due to the adverse interaction between the components.

[0004] Therefore, there is an urgent need in the market to develop a polyethylene master batch with excellent antistatic and flame-retardant properties. SUMMARY

[0005] In view of the problems in the prior art, the purpose of the present application is to obtain a polyethylene masterbatch with excellent mechanical properties, flame retardance and antistatic property.

[0006] In order to achieve the above-mentioned purpose, the technical scheme adopted by the present application is as follows: The present application provides a polyethylene antistatic flame-retardant double-resistant masterbatch, which comprises the following raw materials in parts by weight: polyethylene 50-60 parts, flame retardant 30-35 parts, modified carbon black 9-11 parts, lubricant 0.6-1 part, and antioxidant 0.3-0.5 part.

[0007] In some embodiments, the structural formula of the flame retardant is as follows: ; Wherein, x is an integer from 1 to 5, and y is an integer from 1 to 3.

[0008] In some embodiments, the preparation method of the flame retardant comprises the following steps: (1) Add pentaerythritol phosphate, triethylamine into tetrahydrofuran, and then add 5-chloropentanal under the condition of 0-5℃, stir for 1-2h, then warm up to 20-30℃, continue to stir for 2-3h, and then obtain product 1 through vacuum distillation, extraction, washing and drying; (2) Add product 1 obtained in step (1) into DMF, stir for 30-60min at room temperature, then add catalyst and 4-chloro-1,2-benzenediamine, continue to stir for 30-60min, then warm up to 70-80℃, extract, wash and dry to obtain product 2; (3) Add product 2 obtained in step (2) and triethylamine into tetrahydrofuran, and then add 4-penten-1-ol under the condition of 0-5℃, stir for 1-2h, then warm up to 20-30℃, continue to stir for 2-3h, and then obtain product 3 through vacuum distillation, extraction, washing and drying; (4) Under the atmosphere of nitrogen, add 3-isocyanate propyl triethoxysilane and 3-butene-1-amine into acetone, stir for 1-2h at 40-50℃, wash and dry to obtain a compound; add the obtained compound, product 3 obtained in step (3) and initiator into dichloromethane, warm up to 65-75℃, stir for 2-3h, and then dry to obtain the flame retardant.

[0009] The application prepares a flame retardant which utilizes the synergistic effect of multiple flame retardant mechanisms, has high efficient flame retardancy and anti-dripping performance, has good compatibility with various polymer matrices, is not easy to migrate and precipitate, can reduce the influence on the mechanical properties of the material, and the possible reason is that during combustion, on the one hand, the phosphorus component can promote the formation of a dense and stable carbon layer on the surface of the material, and on the other hand, the silane group can migrate to the surface of the material during combustion to form a Si-O-C or Si-C crosslinking network, further enhancing the strength, density and thermal stability of the carbon layer; in addition, the nitrogen component decomposes to produce non-combustible gases (such as NH3 and N2) upon heating, which dilutes oxygen and combustible gases, and can expand the carbon layer (gas phase flame retardant and intumescent flame retardant), both of which synergistically improve the flame retardant efficiency. In addition, the flame-retardant elements are chemically bonded to the segments of the polymer, effectively avoiding the problem of easy migration and precipitation of small molecule flame retardants, and can provide more persistent and stable flame-retardant effect.

[0010] In some embodiments, the catalyst is sodium persulfate.

[0011] In some embodiments, the molar ratio of the catalyst to product 1 is 1: (0.1-0.3).

[0012] In some embodiments, the molar ratio of the pentaerythritol phosphate to 5-chloropentanal is 1: (1-1.4).

[0013] In some embodiments, the mass ratio of product 1 to 4-chloro-1,2-benzenediamine in step (2) is 1: (1-1.2).

[0014] In some embodiments, the mass ratio of product 2 to 4-penten-1-ol in step (3) is 1: (1-1.2).

[0015] In some embodiments, the preparation method of the modified carbon black comprises the following steps: The carbon black and γ-methacryloyloxypropyltrimethoxysilane are added into an ethanol solution and stirred for 40-60 min, washed and dried to obtain the modified carbon black.

[0016] In some embodiments, the mass ratio of the carbon black to γ-methacryloyloxypropyltrimethoxysilane is 1: (0.3-0.8).

[0017] In some embodiments, the lubricant is any one or several of polyethylene wax, calcium stearate or polysiloxane.

[0018] Preferably, the lubricant is calcium stearate.

[0019] In some embodiments, the antioxidant is any one or several of antioxidant 168, antioxidant 1010 or antioxidant 1135.

[0020] Preferably, the antioxidant is antioxidant 1010.

[0021] The second aspect of the present application provides a preparation method of a polyethylene antistatic flame-retardant double-resist master batch, comprising the following steps: The polyethylene, the flame retardant, the modified carbon black, the lubricant and the antioxidant are added into a kneader, and kneaded at a rotating speed of 90-110 rpm for 30-40 min; after the temperature of the materials in the kneader reaches 100-110 DEG C, the materials are added into a double-screw extruder, extruded and granulated to obtain the polyethylene antistatic flame-retardant double-resist master batch; the temperature of each section of the double-screw extruder is as follows: the first section is 120-140 DEG C, the second section is 150-180 DEG C, the third section is 180-210 DEG C, and the temperature of the die head is 180-210 DEG C.

[0022] Compared with the prior art, the present application has the following beneficial effects: (1) The polyethylene master batch prepared by blending polyethylene, a flame retardant, modified carbon black, a lubricant and an antioxidant has high flame retardancy, good antistatic property and excellent mechanical properties.

[0023] (2) The flame retardant prepared by the present application utilizes the synergistic effect of multiple flame-retardant mechanisms; during combustion, the phosphorus-based component can promote the formation of a dense and stable carbon layer on the surface of the material, and the silane groups can migrate to the surface of the material during combustion to form a crosslinked network, further enhancing the strength, density and thermal stability of the carbon layer, thereby improving the flame-retardant effect. (3) The nitrogen-based component in the flame retardant prepared by the present application can produce non-combustible gases upon heating, which can dilute oxygen and combustible gases and expand the carbon layer; the two components synergistically improve the flame-retardant efficiency, have good compatibility with multiple polymer matrices, are not prone to migration and precipitation, can provide more durable and stable flame-retardant effect, and avoid the influence of conventional flame retardants on the mechanical properties of materials. DETAILED DESCRIPTION

[0024] The present application will be described in detail below with reference to specific embodiments. It should be noted that the following examples are only used to illustrate the present application, and are not intended to limit the present application. Other combinations and various modifications within the concept of the present application can be made without departing from the spirit or scope of the present application.

[0025] In the following examples and comparative examples, the compounds and related reagents used except for the flame retardant can be purchased from the market, wherein the polyethylene has a brand of DGDB2480, and the carbon black has a brand of #3400B.

[0026] The following post-treatment steps such as "washing", "drying", "extraction", "reduced pressure distillation" and the preparation method of the sample, if not otherwise specified, are the routine operations of those skilled in the art, which can be selected by the actual operation.

[0027] Preparation Example 1 The preparation method of the flame retardant-1 comprises the following steps: (1) 1 mol of pentaerythritol phosphate, 1 mol of triethylamine are added into 5 mol of tetrahydrofuran, 1.2 mol of 5-chloropentanal is added at 3°C, stirred for 1.5 h, then warmed to 25°C, continue to stir for 2.5 h, reduced pressure distillation, extraction, washing and drying to obtain product 1, the structural formula of which is as follows: ; (2) 1 mol of product 1 obtained in step (1) is added into 2 mol of DMF, stirred at room temperature for 45 min, then 0.2 mol of sodium persulfate and 1.1 mol of 4-chloro-1,2-benzenediamine are added, continue to stir for 45 min, then warmed to 75°C, extracted, washed and dried to obtain product 2, the structural formula of which is as follows: ; (3) 1 mol of product 2 obtained in step (2), 1 mol of triethylamine are added into 5 mol of tetrahydrofuran, 1.1 mol of 4-penten-1-ol is added at 3°C, stirred for 1.5 h, then warmed to 25°C, continue to stir for 2.5 h, reduced pressure distillation, extraction, washing and drying to obtain product 3, the structural formula of which is as follows: ; (4) 1 mol of 3-isocyanate propyl triethoxysilane and 1.1 mol of 3-butene-1-amine are added into 1 mol of acetone under nitrogen atmosphere, stirred at 45°C for 1.5 h, washed and dried to obtain a compound; 2 mol of the obtained compound, 4 mol of product 3 obtained in step (3) and 0.5 mol of azobisisobutyronitrile are added into 2 mol of dichloromethane, warmed to 70°C, stirred for 2.5 h, and dried to obtain the flame retardant-1, the structural formula of which is as follows: ; Wherein, x = 4, y = 2.

[0028] Preparation Example 2 The preparation method of the flame retardant-2 is the same as that of the preparation example 1, except that the addition amount of the compound in step (4) is 4 mol, wherein x = 4, y = 4.

[0029] Preparation Example 3 The preparation method of flame retardant-3 is the same as that of preparation example 1, except that the amount of product 3 added in step (4) is 6 mol, wherein x = 6 and y = 4.

[0030] Preparation example 4 The preparation method of flame retardant-4 is the same as that of preparation example 1, except that the pentaerythritol phosphate in step (1) is replaced by diphenyl phosphate in equal amount.

[0031] Preparation example 5 The preparation method of flame retardant-5 is the same as that of preparation example 1, except that the 5-chloropentanal in step (1) is replaced by p-chlorobenzaldehyde in equal amount.

[0032] Preparation example 6 The preparation method of flame retardant-6 is the same as that of preparation example 1, except that the 4-penten-1-ol in step (3) is replaced by 6-hepten-1-ol in equal amount.

[0033] Preparation example 7 The preparation method of flame retardant-7 comprises the following steps: (1) 1 mol of pentaerythritol phosphate and 1 mol of triethylamine are added to 5 mol of tetrahydrofuran, and then 1.2 mol of 5-chloropentanal is added at 3°C, stirred for 1.5 h, and then warmed to 25°C and continued to stir for 2.5 h. After distillation under reduced pressure, extraction, washing and drying, product 1 is obtained; (2) 1 mol of product 1 obtained in step (1) is added to 2 mol of DMF, stirred at room temperature for 45 min, and then 0.2 mol of sodium persulfate and 1.1 mol of 4-chloro-1,2-benzenediamine are added and continued to stir for 45 min. After warming to 75°C, extraction, washing and drying, product 2 is obtained; (3) 1 mol of product 2 obtained in step (2) and 1 mol of triethylamine are added to 5 mol of tetrahydrofuran, and then 1.1 mol of 4-penten-1-ol is added at 3°C, stirred for 1.5 h, and then warmed to 25°C and continued to stir for 2.5 h. After distillation under reduced pressure, extraction, washing and drying, product 3 is obtained; (4) 1 mol of 3-isocyanatepropyltriethoxysilane and 1.1 mol of 3-butene-1-amine are added to 1 mol of acetone under nitrogen atmosphere, stirred at 45°C for 1.5 h, washed and dried to obtain a compound. 2 mol of the obtained compound and 4 mol of product 3 obtained in step (3) are added to 2 mol of dichloromethane, warmed to 70°C and stirred for 2.5 h, and then dried to obtain flame retardant-7.

[0034] Preparation example 8 The preparation method of modified carbon black comprises the following steps: 10 g of carbon black and 5 g of γ-methacryloxypropyltrimethoxysilane were added into 100 ml of 95 wt% ethanol solution and stirred for 50 min, and then washed and dried to obtain modified carbon black.

[0035] Example 1 A polyethylene antistatic flame-retardant double-resistant master batch comprises, by weight, the following raw materials: 55 parts of polyethylene, 33 parts of flame retardant-1, 10 parts of modified carbon black, 0.8 parts of calcium stearate, and 0.4 parts of antioxidant 1010.

[0036] The preparation method of the polyethylene antistatic flame-retardant double-resistant master batch comprises the following steps: The polyethylene, the flame retardant-1, the modified carbon black, the calcium stearate, and the antioxidant 1010 were added into a kneader and kneaded at a speed of 100 rpm for 35 min, and then added into a double-screw extruder after the temperature of the materials in the kneader reached 105 ℃, and then extruded and granulated to obtain the polyethylene antistatic flame-retardant double-resistant master batch. The temperature of each section of the double-screw extruder was as follows: 130 ℃ for the first section, 165 ℃ for the second section, 200 ℃ for the third section, and 200 ℃ for the die head.

[0037] Example 2 A polyethylene antistatic flame-retardant double-resistant master batch comprises, by weight, the following raw materials: 50 parts of polyethylene, 30 parts of flame retardant-1, 9 parts of modified carbon black, 0.6 parts of calcium stearate, and 0.3 parts of antioxidant 1010.

[0038] The preparation method of the polyethylene antistatic flame-retardant double-resistant master batch comprises the following steps: The polyethylene, the flame retardant-1, the modified carbon black, the calcium stearate, and the antioxidant 1010 were added into a kneader and kneaded at a speed of 90 rpm for 40 min, and then added into a double-screw extruder after the temperature of the materials in the kneader reached 100 ℃, and then extruded and granulated to obtain the polyethylene antistatic flame-retardant double-resistant master batch. The temperature of each section of the double-screw extruder was as follows: 120 ℃ for the first section, 150 ℃ for the second section, 180 ℃ for the third section, and 180 ℃ for the die head.

[0039] Example 3 A polyethylene antistatic flame-retardant double-resistant master batch comprises, by weight, the following raw materials: 60 parts of polyethylene, 35 parts of flame retardant-1, 11 parts of modified carbon black, 1 part of calcium stearate, and 0.5 parts of antioxidant 1010.

[0040] The preparation method of the polyethylene antistatic flame-retardant double-resistant master batch comprises the following steps: The polyethylene, flame retardant-1, modified carbon black, calcium stearate, antioxidant 1010 were added into a kneader, and kneaded at a speed of 110 rpm for 30 min. After the temperature of the materials in the kneader reached 110℃, they were added into a twin-screw extruder, and extruded and granulated to obtain a polyethylene antistatic flame-retardant double-resistant masterbatch. The temperature of each section of the twin-screw extruder was as follows: 140℃ for the first section, 180℃ for the second section, 210℃ for the third section, and 210℃ for the die head.

[0041] Example 4 A polyethylene antistatic flame-retardant double-resistant masterbatch and a preparation method thereof, the specific implementation manner being the same as that of Example 1, and the difference being that the flame retardant-1 is replaced by an equal amount of flame retardant-2.

[0042] Example 5 A polyethylene antistatic flame-retardant double-resistant masterbatch and a preparation method thereof, the specific implementation manner being the same as that of Example 1, and the difference being that the flame retardant-1 is replaced by an equal amount of flame retardant-3.

[0043] Example 6 A polyethylene antistatic flame-retardant double-resistant masterbatch and a preparation method thereof, the specific implementation manner being the same as that of Example 1, and the difference being that the flame retardant-1 is replaced by an equal amount of flame retardant-4.

[0044] Example 7 A polyethylene antistatic flame-retardant double-resistant masterbatch and a preparation method thereof, the specific implementation manner being the same as that of Example 1, and the difference being that the flame retardant-1 is replaced by an equal amount of flame retardant-5.

[0045] Example 8 A polyethylene antistatic flame-retardant double-resistant masterbatch and a preparation method thereof, the specific implementation manner being the same as that of Example 1, and the difference being that the flame retardant-1 is replaced by an equal amount of flame retardant-6.

[0046] Example 9 A polyethylene antistatic flame-retardant double-resistant masterbatch and a preparation method thereof, the specific implementation manner being the same as that of Example 1, and the difference being that the flame retardant-1 is replaced by an equal amount of flame retardant-7.

[0047] Example 10 A polyethylene antistatic flame-retardant double-resistant masterbatch and a preparation method thereof, the specific implementation manner being the same as that of Example 1, and the difference being that the flame retardant-1 is replaced by an equal amount of antimony trioxide.

[0048] Comparative Example 1 A polyethylene antistatic flame-retardant double-resistant masterbatch and a preparation method thereof, the specific implementation manner being the same as that of Example 1, and the difference being that the modified carbon black-1 is replaced by an equal amount of carbon black.

[0049] Performance test The polyethylene masterbatch obtained from each example and the comparative example was blended with polyethylene according to a mass ratio of 45:55, and a sample was prepared according to a relevant standard, and the following tests were performed.

[0050] Tensile strength: according to standard GB / T1040 Performance detection was performed in 2006; Surface resistance: performance detection was performed according to standard MT558.1-2005; Flame retardancy: detection was performed according to standard MT558.1-2005.

[0051] The test results are shown in Table 1: Table 1

[0052] As shown by the data in Table 1, the polyethylene antistatic flame-retardant double-resistant masterbatch of Examples 1-3 has excellent mechanical properties, antistatic property and flame retardancy. As shown by the comparison of the data of Examples 4 and 5 with that of Example 1, changing the ratio of the compound and product 3 can change the polymerization degree of the polymer, increase the molecular chain, and cause difficulty in uniform dispersion, thereby causing the mechanical properties of the material to decrease and the flame-retardant efficiency to decrease. As shown by the comparison of Examples 6 and 7 with Example 1, replacing the pentaerythritol phosphate with diphenyl phosphate or replacing 5-chloropentanal with p-chlorobenzaldehyde in equal amounts can cause the flame retardant to have limited carbonization promotion in the condensed phase due to poor compatibility with polyethylene, thereby causing the mechanical properties and the flame retardancy of the sample to decrease. As shown by the comparison of Example 8 with Example 1, replacing 4-penten-1-ol with 6-heptene-1-ol in equal amounts can change the length of the branched chain of the flame retardant, affect the crystallinity of the polyethylene, and cause the mechanical properties of the sample to decrease. As shown by the comparison of Example 9 with Example 1, directly using product 3 and the compound as the flame retardant can cause the chemical structure of the polymer matrix to be greatly different, thereby causing poor compatibility and migration, and causing the mechanical properties and the flame retardancy of the sample to decrease. As shown by the comparison of Example 10 with Example 1, using antimony trioxide as the flame retardant can cause the mechanical properties and the flame retardancy of the sample to decrease. As shown by the comparison of Comparative Example 1 with Example 1, directly adding carbon black can cause poor dispersibility, and can cause the mechanical properties and the antistatic property of the sample to decrease.

[0053] The above embodiments are only for illustrating the technical concept and characteristics of the present application, and the purpose is to enable those skilled in the art to understand the content of the present application and implement it, and cannot limit the protection scope of the present application. Any equivalent changes or modifications made according to the spirit and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A polyethylene antistatic and flame-retardant masterbatch, characterized in that, By weight, it includes the following raw materials: 50-60 parts polyethylene, 30-35 parts flame retardant, 9-11 parts modified carbon black, 0.6-1 parts lubricant, and 0.3-0.5 parts antioxidant.

2. The polyethylene antistatic and flame-retardant masterbatch according to claim 1, characterized in that, The structural formula of the flame retardant is as follows: ； Where x = integers from 1 to 5, and y = integers from 1 to 3.

3. The polyethylene antistatic and flame-retardant masterbatch according to claim 2, characterized in that, The method for preparing the flame retardant includes the following steps: (1) Add pentaerythritol phosphate and triethylamine to tetrahydrofuran, add 5-chloropentanal at 0-5℃, stir for 1-2h, then raise the temperature to 20-30℃ and continue stirring for 2-3h, distill under reduced pressure, extract, wash and dry to obtain product 1. (2) Add the product 1 obtained in step (1) to DMF, stir at room temperature for 30-60 min, then add the catalyst and 4-chloro-1,2-phenylenediamine and continue stirring for 30-60 min. Then heat to 70-80℃, extract, wash and dry to obtain product 2. (3) Add the product 2 obtained in step (2) and triethylamine to tetrahydrofuran, add 4-penten-1-ol at 0-5℃, stir for 1-2h, then raise the temperature to 20-30℃ and continue stirring for 2-3h, then distill under reduced pressure, extract, wash and dry to obtain product 3. (4) Under a nitrogen atmosphere, 3-isocyanate-propyltriethoxysilane and 3-buten-1-amine were added to acetone and stirred at 40-50°C for 1-2 hours. The mixture was washed and dried to obtain the compound. The obtained compound, product 3 obtained in step (3), and initiator were added to dichloromethane and heated to 65-75°C for 2-3 hours. The mixture was then dried to obtain the flame retardant.

4. The polyethylene antistatic and flame-retardant masterbatch according to claim 3, characterized in that, The molar ratio of pentaerythritol phosphate to 5-chloropentanal is 1:(1-1.4).

5. The polyethylene antistatic and flame-retardant masterbatch according to claim 3, characterized in that, The mass ratio of product 1 to 4-chloro-1,2-phenylenediamine in step (2) is 1:(1-1.2).

6. The polyethylene antistatic and flame-retardant masterbatch according to claim 3, characterized in that, The mass ratio of product 2 to 4-penten-1-ol in step (3) is 1:(1-1.2).

7. The polyethylene antistatic and flame-retardant masterbatch according to claim 1, characterized in that, The method for preparing the modified carbon black includes the following steps: Carbon black and γ-methacryloxypropyltrimethoxysilane were added to an ethanol solution and stirred for 40-60 minutes. The mixture was then washed and dried to obtain modified carbon black.

8. The polyethylene antistatic and flame-retardant masterbatch according to claim 1, characterized in that, The lubricant is any one or more of polyethylene wax, calcium stearate, or polysiloxane.

9. The polyethylene antistatic and flame-retardant masterbatch according to claim 1, characterized in that, The antioxidant is any one or more of antioxidant 168, antioxidant 1010, or antioxidant 1135.

10. A method for preparing a polyethylene antistatic and flame-retardant masterbatch according to any one of claims 1-9, characterized in that, Includes the following steps: Polyethylene, flame retardant, modified carbon black, lubricant, and antioxidant are added to a kneader and kneaded at 90-110 rpm for 30-40 minutes. After the material temperature in the kneader reaches 100-110℃, it is fed into a twin-screw extruder for extrusion and granulation to obtain a polyethylene antistatic and flame-retardant masterbatch. The temperatures of each section of the twin-screw extruder are: section 1 120-140℃, section 2 150-180℃, section 3 180-210℃, and the die head temperature is 180-210℃.

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