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Photodegradable PE wrapping film and preparation method thereof

A stretch film and photodegradation technology, applied in the field of packaging materials, can solve the problems of white pollution of PE stretch film, achieve high transparency, improve self-adhesiveness, and improve antistatic performance

Active Publication Date: 2020-07-10
江苏祎唯诺新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problems existing in the prior art, and provide a photodegradable PE stretch film to solve the white pollution problem caused by the large-scale use of the existing PE stretch film

Method used

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  • Photodegradable PE wrapping film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Preparation of modified LLDPE by slurry method:

[0039] 1) The polymerization reactor is dried, vacuumized, and replaced with nitrogen for 3 times;

[0040] 2) Introduce 1.0bar hydrogen into the polymerization reactor, add 300 parts of isobutane, start stirring at a speed of 300rpm, and add the main catalyst-supported TiCl 4 / MgCl 2 and cocatalyst triethylaluminum, so that the amount concentration of the main catalyst substance (calculated as titanium) is 2×10 -5 -2×10 -4 mol / L, the ratio of the amount of substance of Al / Ti in the promoter and the main catalyst is 60-120 (molar ratio);

[0041] 3) Raise the temperature of the polymerization reactor in the previous step to 80°C, add 10 parts of 1-butene, 15 parts of 1-hexene, 1.67 parts of diacetone acrylamide, and 8.33 parts of methyl vinyl ketone at a constant temperature, and continuously feed ethylene gas, Control the total pressure to 10 bar, and react for 2 hours at a constant temperature to carry out slurry p...

Embodiment 2

[0048] The rest is the same as in Example 1, except that when the modified LLDPE is prepared by the slurry method, the amount of diacetone acrylamide is 3.75 parts, and the amount of methyl vinyl ketone is 6.25 parts.

Embodiment 3

[0050] The rest are the same as in Example 1, except that when the modified LLDPE is prepared by the slurry method, the amount of 1-butene is 2 parts, and the amount of 1-hexene is 5 parts.

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PUM

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Abstract

The invention relates to a photodegradable PE wrapping film and a preparation method thereof. The wrapping film comprises the following components: 100 parts of modified linear low density polyethylene (LLDPE) and 3-5 parts of a viscous agent, wherein the modified LLDPE is formed by copolymerization of ethylene, 1-butene, 1-hexene and a ketone-containing monomer with alkenyl. The modified LLDPE isprepared by adding the ketone-containing comonomer in the preparation process of linear low-density polyethylene, and the photodegradable PE wrapping film prepared from the modified LLDPE can be automatically degraded under sunlight irradiation after being used. According to the invention, by adjusting the dosage and proportion of diacetone acrylamide and methyl vinyl ketone and / or ethyl vinyl ketone, the elongation at break of the PE wrapping film can be synergistically improved, also the self-adhesion of the PE wrapping film can be improved, and the dosage of an adhesive is properly reduced. An antistatic agent alkoxy amine salt is added in the preparation process of linear low-density polyethylene, so that the antistatic properties of the material is improved, and the photodegradationproperties of the material can be further improved by virtue of a proper amount of alkoxy amine salt.

Description

technical field [0001] The invention belongs to the field of packaging materials, and relates to a degradable stretch film material and a preparation method thereof, in particular to a photodegradable PE stretch film and a preparation method thereof. Background technique [0002] Stretch film, also known as "stretch film", is a new type of self-adhesive wrapping packaging material, with its high tensile strength, high elongation, good self-adhesiveness, high transparency, strong protection and good cleaning performance The performance is widely used in the combined wrapping packaging of industrial products. During use, it is stretched and wrapped around the article, so that the article always maintains its integrity. Not only can it prevent the goods from being polluted, damaged or stolen, and protect the goods, but also facilitate transportation and loading and unloading, and improve freight efficiency. This film is mainly used for carton packaging, glass bottles, cans, c...

Claims

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Application Information

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IPC IPC(8): C08L23/08C08L23/20C08K13/06C08K9/06C08K3/36C08K5/17C08K5/19C08J5/18C08F210/02C08F210/08C08F210/14C08F220/58C08F216/36
CPCC08J5/18C08F210/02C08J2323/08C08J2423/20C08K13/06C08K9/06C08K3/36C08K5/17C08K5/19C08F210/08C08F210/14C08F220/58C08F216/36
Inventor 张国庆张怡
Owner 江苏祎唯诺新材料科技有限公司
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