阅读说明：本技术 一种耐高温聚乙烯保护膜及其制备方法 (High-temperature-resistant polyethylene protective film and preparation method thereof ) 是由 瑭规旦 詹浩 于 2018-06-15 设计创作，主要内容包括：本发明公开了一种耐高温聚乙烯保护膜及其制备方法,所述保护膜的原料包括：聚乙烯、聚碳酸酯、聚酯纤维、醋酸纤维素、抗氧化剂、硬脂酸锌、聚乙烯吡咯烷酮、钛酸酯偶联剂、云母粉、膨润土、茂金属聚乙烯低密度弹性体、油酸和钙锌复合稳定剂。其制备方法是先将云母粉、膨润土和部分钛酸酯偶联剂混合,研磨,得到混合物A,再将聚乙烯、聚碳酸酯、聚酯纤维、茂金属聚乙烯低密度弹性体和剩余量的钛酸酯偶联剂混合,研磨,得到混合物B,然后将混合物A加至混合物B中,加入醋酸纤维素、抗氧化剂、硬脂酸锌、聚乙烯吡咯烷酮、油酸、钙锌复合稳定剂,密炼均匀；最后将步骤3的混合物送入吹膜机中,吹膜,即得。所得保护膜具有优异的理化性能。(The invention discloses a high-temperature-resistant polyethylene protective film and a preparation method thereof, wherein the protective film comprises the following raw materials: polyethylene, polycarbonate, polyester fiber, cellulose acetate, antioxidant, zinc stearate, polyvinylpyrrolidone, titanate coupling agent, mica powder, bentonite, metallocene polyethylene low-density elastomer, oleic acid and calcium-zinc composite stabilizer. The preparation method comprises the steps of mixing mica powder, bentonite and part of titanate coupling agent, grinding to obtain a mixture A, mixing polyethylene, polycarbonate, polyester fiber, metallocene polyethylene low-density elastomer and the rest of titanate coupling agent, grinding to obtain a mixture B, adding the mixture A into the mixture B, adding cellulose acetate, antioxidant, zinc stearate, polyvinylpyrrolidone, oleic acid and calcium-zinc composite stabilizer, and banburying uniformly; and finally, feeding the mixture obtained in the step 3 into a film blowing machine, and blowing the film to obtain the composite material. The obtained protective film has excellent physical and chemical properties.)

1. A high temperature resistant polyethylene protection film which characterized in that: the raw materials comprise the following components in parts by weight: 30-50 parts of polyethylene, 2-6 parts of polycarbonate, 1-7 parts of polyester fiber, 2-4 parts of cellulose acetate, 1-2 parts of antioxidant, 1-2 parts of zinc stearate, 1-2 parts of polyvinylpyrrolidone, 2-3 parts of titanate coupling agent, 2-4 parts of mica powder, 1-3 parts of bentonite, 3-5 parts of metallocene polyethylene low-density elastomer, 1-2 parts of oleic acid and 1-3 parts of calcium-zinc composite stabilizer.

2. The protective film of high temperature resistant polyethylene according to claim 1, wherein: the raw materials comprise the following components in parts by weight: 35-45 parts of polyethylene, 3-5 parts of polycarbonate, 2-6 parts of polyester fiber, 2-4 parts of cellulose acetate, 1-2 parts of antioxidant, 1-2 parts of zinc stearate, 1-2 parts of polyvinylpyrrolidone, 2-3 parts of titanate coupling agent, 2-4 parts of mica powder, 1-3 parts of bentonite, 3-5 parts of metallocene polyethylene low-density elastomer, 1-2 parts of oleic acid and 1-3 parts of calcium-zinc composite stabilizer.

3. The protective film of high temperature resistant polyethylene according to claim 1, wherein: the raw materials comprise the following components in parts by weight: 40 parts of polyethylene, 5 parts of polycarbonate, 3 parts of polyester fiber, 2 parts of cellulose acetate, 1 part of antioxidant, 2 parts of zinc stearate, 1 part of polyvinylpyrrolidone, 2 parts of titanate coupling agent, 3 parts of mica powder, 2 parts of bentonite, 4 parts of metallocene polyethylene low-density elastomer, 2 parts of oleic acid and 1 part of calcium-zinc composite stabilizer.

4. The protective film of high temperature resistant polyethylene according to claim 1, wherein: the antioxidant is a mixture of antioxidant 1010 and antioxidant 168.

5. The protective film of high temperature resistant polyethylene according to claim 1, wherein: the weight ratio of the antioxidant 1010 to the antioxidant 168 is 3: 1.

6. the method for preparing a high temperature resistant polyethylene protective film according to claim 1, wherein: the method comprises the following steps:

step 1, mixing mica powder, bentonite and 1/2 formula dosage of titanate coupling agent, and grinding to obtain a mixture A;

step 2, mixing and grinding polyethylene, polycarbonate, polyester fiber, metallocene polyethylene low-density elastomer and the rest 1/2 formula dosage of titanate coupling agent to obtain a mixture B;

step 3, adding the mixture A into the mixture B, adding cellulose acetate, an antioxidant, zinc stearate, polyvinylpyrrolidone, oleic acid and a calcium-zinc composite stabilizer, and banburying uniformly;

and 4, conveying the mixture obtained in the step 3 into a film blowing machine, and blowing the film to obtain the composite material.

Technical Field

The invention belongs to the technical field of packaging materials, and particularly relates to a high-temperature-resistant polyethylene protective film and a preparation method thereof.

Background

Polyethylene (PE) is a thermoplastic resin prepared by polymerizing ethylene, and also comprises a copolymer of ethylene and a small amount of alpha-olefin in industry, the polyethylene is odorless and nontoxic, feels like wax, has excellent low-temperature resistance (the lowest use temperature can reach-100 ~ -70 ℃), has good chemical stability, can resist corrosion of most of acid and alkali (cannot resist acid with oxidation property), is insoluble in common solvents at normal temperature, and has small water absorption and excellent electrical insulation.

Polyethylene film is the most widely used polymer material in the world today. The polyethylene protective film takes a special polyethylene plastic film as a base material and is divided into a high-density polyethylene protective film, medium-density polyethylene and low-density polyethylene according to different densities. The polyethylene protective film has the greatest advantages that the protected product is not polluted, corroded or scratched in the production, processing, transportation, storage and use processes, and the original bright and clean surface is protected, so that the quality of the product is improved, and the market competitiveness is improved.

Along with the continuous expansion of application range, the requirement of the market on polyethylene protective films is higher and higher, and after the existing polyethylene films are stored for a period of time under a high-temperature condition, the smoothness is reduced, the friction coefficient is increased, so that the polyethylene films are mutually bonded and are not easy to separate, and the use is influenced.

Disclosure of Invention

The invention aims to provide a high-temperature-resistant polyethylene protective film and a preparation method thereof.

A high-temperature resistant polyethylene protective film comprises the following raw materials in parts by weight: 30-50 parts of polyethylene, 2-6 parts of polycarbonate, 1-7 parts of polyester fiber, 2-4 parts of cellulose acetate, 1-2 parts of antioxidant, 1-2 parts of zinc stearate, 1-2 parts of polyvinylpyrrolidone, 2-3 parts of titanate coupling agent, 2-4 parts of mica powder, 1-3 parts of bentonite, 3-5 parts of metallocene polyethylene low-density elastomer, 1-2 parts of oleic acid and 1-3 parts of calcium-zinc composite stabilizer.

The high-temperature resistant polyethylene protective film comprises the following raw materials in parts by weight: 35-45 parts of polyethylene, 3-5 parts of polycarbonate, 2-6 parts of polyester fiber, 2-4 parts of cellulose acetate, 1-2 parts of antioxidant, 1-2 parts of zinc stearate, 1-2 parts of polyvinylpyrrolidone, 2-3 parts of titanate coupling agent, 2-4 parts of mica powder, 1-3 parts of bentonite, 3-5 parts of metallocene polyethylene low-density elastomer, 1-2 parts of oleic acid and 1-3 parts of calcium-zinc composite stabilizer.

The high-temperature resistant polyethylene protective film comprises the following raw materials in parts by weight: 40 parts of polyethylene, 5 parts of polycarbonate, 3 parts of polyester fiber, 2 parts of cellulose acetate, 1 part of antioxidant, 2 parts of zinc stearate, 1 part of polyvinylpyrrolidone, 2 parts of titanate coupling agent, 3 parts of mica powder, 2 parts of bentonite, 4 parts of metallocene polyethylene low-density elastomer, 2 parts of oleic acid and 1 part of calcium-zinc composite stabilizer.

Preferably, the antioxidant is a mixture of antioxidant 1010 and antioxidant 168.

Preferably, the weight ratio of the antioxidant 1010 to the antioxidant 168 is 3: 1.

the preparation method of the high-temperature resistant polyethylene protective film comprises the following steps:

step 1, mixing mica powder, bentonite and 1/2 formula dosage of titanate coupling agent, and grinding to obtain a mixture A;

step 2, mixing and grinding polyethylene, polycarbonate, polyester fiber, metallocene polyethylene low-density elastomer and the rest 1/2 formula dosage of titanate coupling agent to obtain a mixture B;

step 3, adding the mixture A into the mixture B, adding cellulose acetate, an antioxidant, zinc stearate, polyvinylpyrrolidone, oleic acid and a calcium-zinc composite stabilizer, and banburying uniformly;

and 4, conveying the mixture obtained in the step 3 into a film blowing machine, and blowing the film to obtain the composite material.

The high-temperature-resistant polyethylene protective film provided by the invention has excellent physical and chemical properties, wherein the tensile strength reaches over 49MPa, the elongation at break reaches over 420%, the thermal deformation temperature reaches over 172 ℃, the tensile strength and the elongation at break can be kept at good levels after 1000 hours of photoaging, and the high-temperature-resistant polyethylene protective film can be widely applied to various packaging environments.

Detailed Description