阅读说明：本技术 一种聚乙烯树脂的加工方法和由它制成的聚乙烯产品 (Processing method of polyethylene resin and polyethylene product prepared by processing method ) 是由 毛寅 于 2021-06-25 设计创作，主要内容包括：本发明涉及聚乙烯树脂技术领域,尤其为一种聚乙烯树脂的加工方法和由它制成的聚乙烯产品,包括高密度聚乙烯树脂、线性低密度聚乙烯树脂、抗氧化剂、卤素吸收剂、阻燃添加剂和液体改性剂,并且各成分按照重量比分别为：高密度聚乙烯树脂110～150份、线性低密度聚乙烯树脂75～95份、抗氧化剂20～25份、卤素吸收剂15～20份、流变改性剂5～15份和液体改性剂5～8份,本发明可以有效地解决了目前聚乙烯树脂的阻燃性能较差,由其制造出的聚乙烯树脂纤维的力学性能较差,从而导致适用范围受到限制的问题。(The invention relates to the technical field of polyethylene resin, in particular to a processing method of polyethylene resin and a polyethylene product prepared by the processing method, which comprises high-density polyethylene resin, linear low-density polyethylene resin, an antioxidant, a halogen absorbent, a flame retardant additive and a liquid modifier, wherein the components in parts by weight are respectively as follows: the flame-retardant polyethylene fiber comprises, by weight, 110-150 parts of high-density polyethylene resin, 75-95 parts of linear low-density polyethylene resin, 20-25 parts of an antioxidant, 15-20 parts of a halogen absorbent, 5-15 parts of a rheological modifier and 5-8 parts of a liquid modifier.)

1. A polyethylene resin comprises a high-density polyethylene resin, a linear low-density polyethylene resin, an antioxidant, a halogen absorbent, a flame-retardant additive and a liquid modifier, and the components are as follows according to the weight ratio: 110-150 parts of high-density polyethylene resin, 75-95 parts of linear low-density polyethylene resin, 20-25 parts of antioxidant, 15-20 parts of halogen absorbent, 5-15 parts of rheological modifier and 5-8 parts of liquid modifier.

2. A processing method of polyethylene resin is characterized in that: the method comprises the following steps:

s1, feeding the high-density polyethylene resin and the linear low-density polyethylene resin into a vacuum drying oven, carrying out vacuum drying for 1.5-2 h at the temperature of 105-115 ℃, feeding the dried high-density polyethylene resin and the dried linear low-density polyethylene resin into a heating oven, baking for 3-3.5 h, taking out, and carrying out electron radiation treatment on the taken-out high-density polyethylene resin and linear low-density polyethylene resin;

s2, putting the high-density polyethylene resin and the linear low-density polyethylene resin which are subjected to the electron radiation treatment, an antioxidant, a halogen absorbent, a flame-retardant additive and a liquid modifier into a mixer, stirring the mixer at the rotating speed of 450-500 rpm for 1-1.5 min, then stirring at the rotating speed of 1400-1480 rpm for 2.5-3.5 min, repeating the operation for 5-7 times, adding the uniformly mixed materials into a double-screw extruder, and melting, plasticizing, extruding and granulating to obtain polyethylene resin particles;

s3, dissolving polyethylene resin particles in an organic solvent at 80-85 ℃ to obtain a polyethylene resin solution, esterifying the polyethylene resin solution to obtain a primary esterified polyethylene resin fiber stock solution, adding sodium peroxide when the temperature of the primary esterified polyethylene resin fiber stock solution is reduced to 45-55 ℃, simultaneously stirring at low speed, and reacting for 4-7 h to obtain a polyethylene resin fiber spinning stock solution;

and S4, standing and defoaming the polyethylene resin fiber spinning solution, carrying out wet spinning on the polyethylene resin fiber spinning solution into a first coagulating bath solution for spinning after defoaming is finished to obtain polyethylene resin fiber protofilaments, immersing the polyethylene resin fiber protofilaments into a second coagulating bath solution for drafting, and then carrying out cleaning, drying and winding to obtain the polyethylene resin fibers.

3. A polyethylene resin according to claim 1, wherein: the halogen absorbent is calcium stearate, the flame retardant additive is prepared by mixing polyethylene glycol, polyvinyl chloride resin, sodium silicate, aluminum nitrate nonahydrate and lithium nitrate according to the installation mass ratio of 1: 2: 1: 3: 5, and the liquid modifier is prepared by mixing glycerol and silicone oil according to the mass ratio of 3: 2.

4. The method for processing a polyethylene resin according to claim 2, wherein: the specific operation steps of the electron radiation processing in S1 are as follows:

s11, pre-irradiating the high-density polyethylene resin and the linear low-density polyethylene resin by beta rays in an air atmosphere by using an electron accelerator as an irradiation source, wherein the pre-irradiation dose range is 40 kGy-45 kGy, and the time is 3-5 h;

s12, standing the irradiated high-density polyethylene resin and linear low-density polyethylene resin for 2 to 3 hours, heating at 105 to 150 ℃ for 40 to 50 minutes, and taking out.

5. The method for processing a polyethylene resin according to claim 2, wherein: the mixing and stirring temperature in the S2 is lower than 35 ℃, the length-diameter ratio of screws of the double-screw extruder is 33.5:1, and the temperature of each processing area in the double-screw extruder is as follows: zone 1 145 ℃, zone 2 150 ℃, zone 3 180 ℃, zone 4 180 ℃, zone 5 180 ℃, zone 6 150 ℃, zone 7 160 ℃, zone 8 180 ℃ and zone 9 ℃ 180 ℃.

6. The method for processing a polyethylene resin according to claim 2, wherein: the specific operation steps of the esterification treatment in the step S3 are as follows:

s21, adding liquid carboxylic acid into the polyethylene resin solution for mixing, heating the polyethylene resin solution to enable the temperature to rise to 80-83 ℃, reacting for 1-1.25 h, and stirring at the rotating speed of 700-750 rpm to prepare a mixed stock solution;

s32, heating the mixed stock solution to 95-98 ℃, adding acid for esterification, controlling the pH value of the mixed stock solution to 0-4, stirring at the rotating speed of 350-400 rpm, and reacting for 2.5-3.5 h to obtain the primarily esterified polyethylene resin fiber stock solution.

7. The method for processing a polyethylene resin according to claim 2, wherein: the first coagulating bath solution in the S4 is prepared by mixing and dissolving water, urea and sodium chloride at a mounting mass ratio of 3: 4: 2 in a room temperature environment, and the second coagulating bath solution is prepared by mixing and dissolving water and sodium bisulfite at a mounting mass ratio of 5:1 in the room temperature environment.

Technical Field

The invention relates to the technical field of polyethylene resin, in particular to a processing method of polyethylene resin and a polyethylene product prepared by the processing method.

Background

Polyethylene resin, abbreviated as PE, is a thermoplastic resin prepared by polymerizing ethylene, and industrially also comprises a copolymer of ethylene and a small amount of alpha-olefin, and the polyethylene has excellent low-temperature resistance, good chemical stability, resistance to corrosion of most of acid and alkali, insolubility in common solvents at normal temperature, small water absorption and excellent electrical insulation performance.

At present, the flame retardant property of the polyethylene resin is poor, and the mechanical property of the polyethylene resin fiber manufactured by the polyethylene resin is poor, so that the application range is limited.

In summary, the present invention solves the existing problems by devising a processing method of polyethylene resin and polyethylene products made therefrom

Disclosure of Invention

The present invention is directed to a method of processing a polyethylene resin and a polyethylene product made therefrom to solve the problems set forth in the background art described above.

In order to achieve the purpose, the invention provides the following technical scheme:

a processing method of polyethylene resin and a polyethylene product prepared by the same comprise high-density polyethylene resin, linear low-density polyethylene resin, antioxidant, halogen absorbent, flame retardant additive and liquid modifier, and the components are respectively as follows according to the weight ratio: 110-150 parts of high-density polyethylene resin, 75-95 parts of linear low-density polyethylene resin, 20-25 parts of antioxidant, 15-20 parts of halogen absorbent, 5-15 parts of rheological modifier and 5-8 parts of liquid modifier.

As a preferable scheme of the invention, the method comprises the following steps:

s1, feeding the high-density polyethylene resin and the linear low-density polyethylene resin into a vacuum drying oven, carrying out vacuum drying for 1.5-2 h at the temperature of 105-115 ℃, feeding the dried high-density polyethylene resin and the dried linear low-density polyethylene resin into a heating oven, baking for 3-3.5 h, taking out, and carrying out electron radiation treatment on the taken-out high-density polyethylene resin and linear low-density polyethylene resin;

s2, putting the high-density polyethylene resin and the linear low-density polyethylene resin which are subjected to the electron radiation treatment, an antioxidant, a halogen absorbent, a flame-retardant additive and a liquid modifier into a mixer, stirring the mixer at the rotating speed of 450-500 rpm for 1-1.5 min, then stirring at the rotating speed of 1400-1480 rpm for 2.5-3.5 min, repeating the operation for 5-7 times, adding the uniformly mixed materials into a double-screw extruder, and melting, plasticizing, extruding and granulating to obtain polyethylene resin particles;

s3, dissolving polyethylene resin particles in an organic solvent at 80-85 ℃ to obtain a polyethylene resin solution, esterifying the polyethylene resin solution to obtain a primary esterified polyethylene resin fiber stock solution, adding sodium peroxide when the temperature of the primary esterified polyethylene resin fiber stock solution is reduced to 45-55 ℃, simultaneously stirring at low speed, and reacting for 4-7 h to obtain a polyethylene resin fiber spinning stock solution;

and S4, standing and defoaming the polyethylene resin fiber spinning solution, carrying out wet spinning on the polyethylene resin fiber spinning solution into a first coagulating bath solution for spinning after defoaming is finished to obtain polyethylene resin fiber protofilaments, immersing the polyethylene resin fiber protofilaments into a second coagulating bath solution for drafting, and then carrying out cleaning, drying and winding to obtain the polyethylene resin fibers.

As a preferable scheme of the invention, the halogen absorbent is calcium stearate, the flame-retardant additive is prepared by mixing polyethylene glycol, polyvinyl chloride resin, sodium silicate, aluminum nitrate nonahydrate and lithium nitrate according to the installation mass ratio of 1: 2: 1: 3: 5, and the liquid modifier is prepared by mixing glycerol and silicone oil according to the mass ratio of 3: 2.

As a preferable embodiment of the present invention, the electron irradiation treatment in S1 includes:

s11, pre-irradiating the high-density polyethylene resin and the linear low-density polyethylene resin by beta rays in an air atmosphere by using an electron accelerator as an irradiation source, wherein the pre-irradiation dose range is 40 kGy-45 kGy, and the time is 3-5 h;

s12, standing the irradiated high-density polyethylene resin and linear low-density polyethylene resin for 2 to 3 hours, heating at 105 to 150 ℃ for 40 to 50 minutes, and taking out.

As a preferable scheme of the invention, the mixing and stirring temperature in S2 is lower than 35 ℃, the length-diameter ratio of a screw of a double-screw extruder is 33.5:1, and the temperature of each processing area in the double-screw extruder is as follows: zone 1 145 ℃, zone 2 150 ℃, zone 3 180 ℃, zone 4 180 ℃, zone 5 180 ℃, zone 6 150 ℃, zone 7 160 ℃, zone 8 180 ℃ and zone 9 ℃ 180 ℃.

As a preferable embodiment of the present invention, the esterification treatment in S3 specifically comprises the following steps:

s21, adding liquid carboxylic acid into the polyethylene resin solution for mixing, heating the polyethylene resin solution to enable the temperature to rise to 80-83 ℃, reacting for 1-1.25 h, and stirring at the rotating speed of 700-750 rpm to prepare a mixed stock solution;

s32, heating the mixed stock solution to 95-98 ℃, adding acid for esterification, controlling the pH value of the mixed stock solution to 0-4, stirring at the rotating speed of 350-400 rpm, and reacting for 2.5-3.5 h to obtain the primarily esterified polyethylene resin fiber stock solution.

In a preferred embodiment of the present invention, the first coagulation bath solution in S4 is prepared by mixing and dissolving water, urea, and sodium chloride at a mass ratio of 3: 4: 2 at room temperature, and the second coagulation bath solution is prepared by mixing and dissolving water and sodium bisulfite at a mass ratio of 5:1 at room temperature.

Compared with the prior art, the invention has the beneficial effects that:

1. according to the invention, the flame retardant additive and the liquid modifier are added in the polyethylene resin manufacturing process, polyethylene glycol, polyvinyl chloride resin and sodium silicate in the flame retardant additive can form silicon resin molecules in the polyethylene resin, the silicon resin molecules can form a modified macromolecular reticular structure under the action of the liquid modifier, the heat conductivity and the flame retardance are improved, meanwhile, aluminum nitrate nonahydrate and lithium nitrate can form a lithium carbonate phase structure in the polyethylene resin, lithium carbonate can be decomposed to generate carbon dioxide during subsequent high-temperature combustion, the combustion gas is diluted, and oxygen and the polyethylene resin are blocked, so that the flame retardant property of the polyethylene resin is further improved.

2. In the invention, the first coagulation bath solution and the second coagulation bath solution are used in the production process of the polyethylene resin fiber, the high-concentration sodium chloride aqueous solution is used as the first coagulation bath solution, wet spinning is carried out, and the polyethylene fiber obtained by post-stretching and heat treatment has excellent mechanical property.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments, and all other embodiments obtained by a person of ordinary skill in the art without any creative work based on the embodiments of the present invention belong to the protection scope of the present invention.

The invention provides a technical scheme that:

a processing method of polyethylene resin and a polyethylene product prepared by the same comprise high-density polyethylene resin, linear low-density polyethylene resin, antioxidant, halogen absorbent, flame retardant additive and liquid modifier, and the components are respectively as follows according to the weight ratio: 110-150 parts of high-density polyethylene resin, 75-95 parts of linear low-density polyethylene resin, 20-25 parts of antioxidant, 15-20 parts of halogen absorbent, 5-15 parts of rheological modifier and 5-8 parts of liquid modifier.

Further, the method comprises the following steps:

s1, feeding the high-density polyethylene resin and the linear low-density polyethylene resin into a vacuum drying oven, carrying out vacuum drying for 1.5-2 h at the temperature of 105-115 ℃, feeding the dried high-density polyethylene resin and the dried linear low-density polyethylene resin into a heating oven, baking for 3-3.5 h, taking out, and carrying out electron radiation treatment on the taken-out high-density polyethylene resin and linear low-density polyethylene resin;

s2, putting the high-density polyethylene resin and the linear low-density polyethylene resin which are subjected to the electron radiation treatment, an antioxidant, a halogen absorbent, a flame-retardant additive and a liquid modifier into a mixer, stirring the mixer at the rotating speed of 450-500 rpm for 1-1.5 min, then stirring at the rotating speed of 1400-1480 rpm for 2.5-3.5 min, repeating the operation for 5-7 times, adding the uniformly mixed materials into a double-screw extruder, and melting, plasticizing, extruding and granulating to obtain polyethylene resin particles;

s3, dissolving polyethylene resin particles in an organic solvent at 80-85 ℃ to obtain a polyethylene resin solution, esterifying the polyethylene resin solution to obtain a primary esterified polyethylene resin fiber stock solution, adding sodium peroxide when the temperature of the primary esterified polyethylene resin fiber stock solution is reduced to 45-55 ℃, simultaneously stirring at low speed, and reacting for 4-7 h to obtain a polyethylene resin fiber spinning stock solution;

and S4, standing and defoaming the polyethylene resin fiber spinning solution, carrying out wet spinning on the polyethylene resin fiber spinning solution into a first coagulating bath solution for spinning after defoaming is finished to obtain polyethylene resin fiber protofilaments, immersing the polyethylene resin fiber protofilaments into a second coagulating bath solution for drafting, and then carrying out cleaning, drying and winding to obtain the polyethylene resin fibers.

Further, the halogen absorbent is calcium stearate, the flame retardant additive is prepared by mixing polyethylene glycol, polyvinyl chloride resin, sodium silicate, aluminum nitrate nonahydrate and lithium nitrate according to the installation mass ratio of 1: 2: 1: 3: 5, and the liquid modifier is prepared by mixing glycerol and silicone oil according to the mass ratio of 3: 2.

Further, the specific operation steps of the electron irradiation processing in S1 are as follows:

s11, pre-irradiating the high-density polyethylene resin and the linear low-density polyethylene resin by beta rays in an air atmosphere by using an electron accelerator as an irradiation source, wherein the pre-irradiation dose range is 40 kGy-45 kGy, and the time is 3-5 h;

s12, standing the irradiated high-density polyethylene resin and linear low-density polyethylene resin for 2 to 3 hours, heating at 105 to 150 ℃ for 40 to 50 minutes, and taking out.

Further, the mixing and stirring temperature in the S2 is lower than 35 ℃, the length-diameter ratio of screws of the double-screw extruder is 33.5:1, and the temperature of each processing area in the double-screw extruder is as follows: zone 1 145 ℃, zone 2 150 ℃, zone 3 180 ℃, zone 4 180 ℃, zone 5 180 ℃, zone 6 150 ℃, zone 7 160 ℃, zone 8 180 ℃ and zone 9 ℃ 180 ℃.

Further, the esterification treatment in S3 specifically includes:

s21, adding liquid carboxylic acid into the polyethylene resin solution for mixing, heating the polyethylene resin solution to enable the temperature to rise to 80-83 ℃, reacting for 1-1.25 h, and stirring at the rotating speed of 700-750 rpm to prepare a mixed stock solution;

s32, heating the mixed stock solution to 95-98 ℃, adding acid for esterification, controlling the pH value of the mixed stock solution to 0-4, stirring at the rotating speed of 350-400 rpm, and reacting for 2.5-3.5 h to obtain the primarily esterified polyethylene resin fiber stock solution.

Furthermore, in the S4, the first coagulation bath solution is prepared by mixing and dissolving water, urea and sodium chloride at a mass ratio of 3: 4: 2 at room temperature, and the second coagulation bath solution is prepared by mixing and dissolving water and sodium bisulfite at a mass ratio of 5:1 at room temperature.

Detailed description of the preferred embodiments

Example 1:

weighing 110 parts of high-density polyethylene resin, 75 parts of linear low-density polyethylene resin, 20 parts of antioxidant, 15 parts of halogen absorbent, 5-15 parts of rheology modification and 5-8 parts of liquid modifier, sending the high-density polyethylene resin and the linear low-density polyethylene resin into a vacuum drying oven, carrying out vacuum drying at 105 ℃ for 1.5h, sending the dried high-density polyethylene resin and the dried linear low-density polyethylene resin into a heating oven, baking for 3h, taking out, carrying out electron radiation treatment on the taken-out high-density polyethylene resin and the linear low-density polyethylene resin, adopting an electron accelerator as an irradiation source, carrying out pre-irradiation on the high-density polyethylene resin and the linear low-density polyethylene resin by beta rays under the air atmosphere, wherein the pre-irradiation dose range is 40kGy, the time is 3h, standing the irradiated high-density polyethylene resin and the linear low-density polyethylene resin for 2h, heating at 105 deg.C for 40min, and taking out;

putting the high-density polyethylene resin and linear low-density polyethylene resin which are subjected to electronic radiation treatment, an antioxidant, a halogen absorbent, a flame-retardant additive and a liquid modifier into a mixer, stirring the mixer at the rotating speed of 450rpm for 1min, then at the rotating speed of 1400rpm for 2.5min, wherein the mixing and stirring temperature is lower than 35 ℃, repeating the operation for 5 times, adding the uniformly mixed materials into a double-screw extruder for melting, plasticizing, extruding and granulating, wherein the length-diameter ratio of a screw of the double-screw extruder is 33.5:1, and the temperature of each processing area in the double-screw extruder is as follows: 1, 145 ℃, 2, 150 ℃, 3, 180 ℃, 4, 180 ℃, 5, 180 ℃, 6, 150 ℃, 7, 160 ℃, 8, 180 ℃ and 9, thereby obtaining polyethylene resin particles;

dissolving polyethylene resin particles in an organic solvent at 80 ℃ to obtain a polyethylene resin solution, carrying out esterification treatment on the polyethylene resin solution, adding liquid carboxylic acid into the polyethylene resin solution for mixing, heating the polyethylene resin solution to 80 ℃, keeping the temperature of the polyethylene resin solution raised to 80 ℃, keeping the reaction time to be 1h, stirring at the rotating speed of 700rpm to prepare a mixed stock solution, heating the mixed stock solution to 95 ℃, adding acid for esterification, controlling the pH value of the mixed stock solution to be 3.5, simultaneously stirring at the rotating speed of 350rpm, reacting for 2.5h to obtain a preliminarily esterified polyethylene resin fiber stock solution, and when the temperature of the preliminarily esterified polyethylene resin fiber stock solution is lowered to 45 ℃, adding sodium peroxide, and simultaneously stirring at a low speed for reacting for 4h to obtain a polyethylene resin fiber spinning stock solution;

and (2) standing and defoaming the polyethylene resin fiber spinning solution, after defoaming, carrying out wet spinning on the polyethylene resin fiber spinning solution to a first coagulation bath solution for spinning to obtain polyethylene resin fiber protofilaments, immersing the polyethylene resin fiber protofilaments into a second coagulation bath solution for drafting, and then carrying out cleaning, drying and winding to obtain the polyethylene resin fibers.

Example 2:

weighing 110 parts of high-density polyethylene resin, 75 parts of linear low-density polyethylene resin, 20 parts of antioxidant, 15 parts of halogen absorbent, 11.5 parts of rheology modification and 7.5 parts of liquid modifier, sending the high-density polyethylene resin and the linear low-density polyethylene resin into a vacuum drying oven, carrying out vacuum drying at 105 ℃ for 1.5h, sending the dried high-density polyethylene resin and the dried linear low-density polyethylene resin into a heating oven, baking for 3h, taking out, carrying out electron radiation treatment on the taken-out high-density polyethylene resin and linear low-density polyethylene resin, adopting an electron accelerator as an irradiation source, carrying out pre-irradiation on the high-density polyethylene resin and linear low-density polyethylene resin by beta rays under the air atmosphere, wherein the pre-irradiation dose range is 40kGy, the time is 3h, standing the irradiated high-density polyethylene resin and linear low-density polyethylene resin for 2h, heating at 105 deg.C for 40min, and taking out;

putting the high-density polyethylene resin and linear low-density polyethylene resin which are subjected to electronic radiation treatment, an antioxidant, a halogen absorbent, a flame-retardant additive and a liquid modifier into a mixer, stirring the mixer at the rotating speed of 450rpm for 1min, then at the rotating speed of 1400rpm for 2.5min, wherein the mixing and stirring temperature is lower than 35 ℃, repeating the operation for 5 times, adding the uniformly mixed materials into a double-screw extruder for melting, plasticizing, extruding and granulating, wherein the length-diameter ratio of a screw of the double-screw extruder is 33.5:1, and the temperature of each processing area in the double-screw extruder is as follows: 1, 145 ℃, 2, 150 ℃, 3, 180 ℃, 4, 180 ℃, 5, 180 ℃, 6, 150 ℃, 7, 160 ℃, 8, 180 ℃ and 9, thereby obtaining polyethylene resin particles;

dissolving polyethylene resin particles in an organic solvent at 80 ℃ to obtain a polyethylene resin solution, carrying out esterification treatment on the polyethylene resin solution, adding liquid carboxylic acid into the polyethylene resin solution for mixing, heating the polyethylene resin solution to 80 ℃, keeping the temperature of the polyethylene resin solution raised to 80 ℃, keeping the reaction time to be 1h, stirring at the rotating speed of 700rpm to prepare a mixed stock solution, heating the mixed stock solution to 95 ℃, adding acid for esterification, controlling the pH value of the mixed stock solution to be 3.5, simultaneously stirring at the rotating speed of 350rpm, reacting for 2.5h to obtain a preliminarily esterified polyethylene resin fiber stock solution, and when the temperature of the preliminarily esterified polyethylene resin fiber stock solution is lowered to 45 ℃, adding sodium peroxide, and simultaneously stirring at a low speed for reacting for 4h to obtain a polyethylene resin fiber spinning stock solution;

and (2) standing and defoaming the polyethylene resin fiber spinning solution, after defoaming, carrying out wet spinning on the polyethylene resin fiber spinning solution to a first coagulation bath solution for spinning to obtain polyethylene resin fiber protofilaments, immersing the polyethylene resin fiber protofilaments into a second coagulation bath solution for drafting, and then carrying out cleaning, drying and winding to obtain the polyethylene resin fibers.

Example 3:

weighing 110 parts of high-density polyethylene resin, 75 parts of linear low-density polyethylene resin, 20 parts of antioxidant, 15 parts of halogen absorbent, 15 parts of rheology modification and 8 parts of liquid modifier, sending the high-density polyethylene resin and the linear low-density polyethylene resin into a vacuum drying oven, carrying out vacuum drying for 1.5h at the temperature of 105 ℃, sending the dried high-density polyethylene resin and the dried linear low-density polyethylene resin into a heating oven, baking for 3h, taking out, carrying out electronic radiation treatment on the taken-out high-density polyethylene resin and the taken-out linear low-density polyethylene resin, adopting an electronic accelerator as an irradiation source, carrying out pre-irradiation on the high-density polyethylene resin and the linear low-density polyethylene resin by beta rays under the air atmosphere, wherein the pre-irradiation dose range is 40kGy, the time is 3h, placing the irradiated high-density polyethylene resin and the linear low-density polyethylene resin for 2h, heating at 105 deg.C for 40min, and taking out;

putting the high-density polyethylene resin and linear low-density polyethylene resin which are subjected to electronic radiation treatment, an antioxidant, a halogen absorbent, a flame-retardant additive and a liquid modifier into a mixer, stirring the mixer at the rotating speed of 450rpm for 1min, then at the rotating speed of 1400rpm for 2.5min, wherein the mixing and stirring temperature is lower than 35 ℃, repeating the operation for 5 times, adding the uniformly mixed materials into a double-screw extruder for melting, plasticizing, extruding and granulating, wherein the length-diameter ratio of a screw of the double-screw extruder is 33.5:1, and the temperature of each processing area in the double-screw extruder is as follows: 1, 145 ℃, 2, 150 ℃, 3, 180 ℃, 4, 180 ℃, 5, 180 ℃, 6, 150 ℃, 7, 160 ℃, 8, 180 ℃ and 9, thereby obtaining polyethylene resin particles;

dissolving polyethylene resin particles in an organic solvent at 80 ℃ to obtain a polyethylene resin solution, carrying out esterification treatment on the polyethylene resin solution, adding liquid carboxylic acid into the polyethylene resin solution for mixing, heating the polyethylene resin solution to 80 ℃, keeping the temperature of the polyethylene resin solution raised to 80 ℃, keeping the reaction time to be 1h, stirring at the rotating speed of 700rpm to prepare a mixed stock solution, heating the mixed stock solution to 95 ℃, adding acid for esterification, controlling the pH value of the mixed stock solution to be 3.5, simultaneously stirring at the rotating speed of 350rpm, reacting for 2.5h to obtain a preliminarily esterified polyethylene resin fiber stock solution, and when the temperature of the preliminarily esterified polyethylene resin fiber stock solution is lowered to 45 ℃, adding sodium peroxide, and simultaneously stirring at a low speed for reacting for 4h to obtain a polyethylene resin fiber spinning stock solution;

and (2) standing and defoaming the polyethylene resin fiber spinning solution, after defoaming, carrying out wet spinning on the polyethylene resin fiber spinning solution to a first coagulation bath solution for spinning to obtain polyethylene resin fiber protofilaments, immersing the polyethylene resin fiber protofilaments into a second coagulation bath solution for drafting, and then carrying out cleaning, drying and winding to obtain the polyethylene resin fibers.

The polyethylene resin fibers manufactured in the above-mentioned embodiments 1 to 3 were subjected to the performance test, and the test results are shown in Table 1

TABLE 1 polyethylene resin fiber Performance test results Table

It can be seen from table 1 that with the increase of the flame retardant additive and the liquid modifier in the production process of the polyethylene resin fiber, the mechanical properties and the flame retardant properties of the produced polyethylene resin fiber are greatly enhanced.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.