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A kind of low temperature resistant plastic film and preparation method thereof

A plastic film and low-temperature-resistant technology, applied in the field of plastic film, can solve the problems of poor low-temperature resistance, poor stretching, and brittleness of the film, and achieve the effects of good flexibility, simple preparation method, and wide application fields

Active Publication Date: 2017-06-30
广东炜鸿塑料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing films have poor low temperature resistance, and problems such as brittle cracks and poor stretching will occur in some low temperature environments, which have limited their use.

Method used

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  • A kind of low temperature resistant plastic film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-5、 comparative example 1-2

[0020] Table 1: Formulations of Examples 1-5 and Comparative Examples 1-2

[0021] Example 1 Example 2 Example 3 Example 4 Example 5 Comparative example 1 Comparative example 2 LDPE 21 servings 20 servings 25 servings 23 servings 21 servings 26 servings 15 servings EVA 22 servings 23 servings 25 servings 21 servings 22 servings 25 servings 18 servings MDPE 20 servings 25 servings 22 servings 24 servings 20 servings 16 servings 28 servings LLDPE 35 servings 40 servings 25 servings 30 servings 35 servings 37 servings 42 servings Anti-blocking agent 1 serving 1.2 copies 1.3 servings 1.5 servings 1 serving 1 serving 1.2 copies

[0022] Lubricant 1 serving 1.4 copies 1.5 servings 1.2 copies 1 serving 1.4 copies 1.5 servings

[0023] Wherein, in Examples 1-2, 5 and Comparative Example 1-2, the density of the LDPE is 0.925 g / cm 3 ; The density of the LLDPE is 0.924g / cm 3 ; MDPE refers to a density of 0.945g / cm 3 The mass percentage of vinyl acetate in the EVA is 18%; the melt i...

Embodiment 3

[0024] In Example 3, the density of the LDPE is 0.926g / cm 3 ; The density of the LLDPE is 0.922g / cm 3 ; MDPE refers to a density of 0.945g / cm 3 The mass percentage of vinyl acetate in the EVA is 20%; the melt index of the ethylene-vinyl acetate copolymer is 1M / min; the blocking agent in Example 3 is silica and polyethylene according to mass The ratio is a mixture of 1:9.

Embodiment 4

[0025] In Example 4, the density of the LDPE is 0.922g / cm 3 ; The density of the LLDPE is 0.926g / cm 3 ; MDPE refers to a density of 0.945g / cm 3 The mass percentage of vinyl acetate in the EVA is 5%; the melt index of the ethylene-vinyl acetate copolymer is 5M / min; the blocking agent in Example 4 is silica and polyethylene according to mass The ratio is 1:10 mixture.

[0026] The lubricants in Examples 1-5 and Comparative Examples 1-2 are all magnesium stearate.

[0027] In the method for preparing low-temperature resistant plastic film, the temperature of extrusion molding in the extruder in Examples 1-2, 5 and Comparative Example 1-2 was 180°C. The temperature of the extrusion molding process in Example 3 was 130°C; the temperature of the extrusion molding process in Example 4 was 190°C.

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Abstract

The invention relates to a low temperature resistant plastic film. The low temperature resistant plastic film is prepared from following ingredients, by weight, 20 to 25 parts of low density polyethylene, 20 to 25 parts of a ethylene vinyl acetate copolymer, 20 to 25 parts of medium density polyethylene, 25 to 40 parts of linear low density polyethylene, 1 to 1.5 parts of an anti blocking agent, and 1 to 1.5 parts of a lubricant. The invention also provides a preparation method of the low temperature resistant plastic film. The low temperature resistant plastic film is wide in application range, and possesses low temperature resistance. The preparation method is simple, and is convenient to operate.

Description

Technical field [0001] The invention relates to a plastic film, in particular to a low-temperature resistant plastic film and a preparation method thereof. Background technique [0002] Plastic film, used for packaging, and used as a coating layer. Plastic packaging and plastic packaging products are taking up more and more shares in the market, especially composite plastic flexible packaging, which has been widely used in food, medicine, chemical and other fields, and food packaging has the largest proportion, such as beverage packaging , Quick-frozen food packaging, steamed food packaging, fast food packaging, etc., these products have brought great convenience to people's lives. However, the existing films have poor low-temperature resistance, and problems such as embrittlement and poor stretching may occur in some low-temperature environments, which limits their use. Summary of the invention [0003] The purpose of the present invention is to provide a low-temperature resist...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/08C08L23/06C08K3/36
CPCC08L23/06C08L23/08C08L2201/10C08L2203/162C08L2205/025C08L2205/035C08K3/36
Inventor 彭海松余建光
Owner 广东炜鸿塑料科技有限公司