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Biaxial stretched polyethylene protective film

A polyethylene protective film, biaxial stretching technology, applied in the field of packaging films, can solve the problems of poor toughness, can not effectively protect precision instruments, etc., and achieve the effect of good toughness

Inactive Publication Date: 2010-06-30
HUBEI FIRSTA MATERIALS SCI & TECH GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the film used for packaging {such as biaxially oriented polypropylene film} has the following shortcomings: poor toughness, and cannot effectively protect precision instruments

Method used

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  • Biaxial stretched polyethylene protective film
  • Biaxial stretched polyethylene protective film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] like figure 1 As shown in the figure, the biaxially oriented polyethylene protective film consists of a functional layer 1, a core layer 2 and a sub-functional layer 3. The core layer 2 is located between the functional layer 1 and the sub-functional layer 3. The functional layer 1, the core layer 2 and The secondary functional layer 3 is integrated by biaxial stretching after co-extrusion (extrusion temperature is 180-210°C, using the existing co-extrusion and biaxial stretching process);

[0014] The material of the functional layer 1 is composed of low density polyethylene, metallocene polyethylene (linear), anti-sticking agent and slip agent, and the mass percentage of each component is: low density polyethylene 60%, metallocene polyethylene Ethylene 35%, anti-sticking agent 3%, slip agent 2%;

[0015] The material of the core layer 2 is metallocene polyethylene;

[0016] The material of the secondary functional layer 3 is composed of ethylene-vinyl acetate copoly...

Embodiment 2

[0024] It is basically the same as Example 1, except that the anti-blocking agent is talc, and the slipping agent is oleic acid amide.

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Abstract

The invention belongs to the wrapping material technical field, particularly to a wrapping film. A two- way stretched polyethylene protective film is characterized by comprising a functional layer, a core layer and a secondary functional layer, the core layer is located between the functional layer and the secondary functional layer, the functional layer, the core layer and the secondary functional layer are co-extruded and then biaxial stretched to form one; the material for the functional layer is composed by(weight percentage) 60 percent of low-density polyethylene, 35 percent of metallocene polyethylene, 3 percent of antiadhesion agent and 2 percent of smoothness agent; the material for the core layer is metallocene polyethylene; and the material for the secondary functional layer is composed by(weight percentage) 60 percent of low-density polyethylene, 40 percent of metallocene polyethylene; the material weight ratio of the functional layer, the core layer and the secondary functional layer is 1:1:1. The invention has the advantages of excellent toughness, incise-wound and bumping-wound resistance.

Description

technical field [0001] The invention belongs to the technical field of packaging materials, and in particular relates to a film for packaging. Background technique [0002] The current packaging films {such as biaxially oriented polypropylene films} have the following deficiencies: poor toughness and cannot effectively protect precision instruments. SUMMARY OF THE INVENTION [0003] The purpose of the present invention is to provide a biaxially oriented polyethylene protective film with good toughness. [0004] In order to achieve the above purpose, the technical scheme of the present invention is: a biaxially oriented polyethylene protective film, which is characterized in that: it consists of a functional layer, a core layer and a sub-functional layer, the core layer is located between the functional layer and the sub-functional layer, and the functional layer is The layer, core layer and sub-functional layer are co-extruded and then biaxially stretched into one; [00...

Claims

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Application Information

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IPC IPC(8): B65D65/40B32B27/08B32B27/18
Inventor 褚峰林陈德超江四华杨永胜聂家华朱红卫喻世华刘杰孙麟
Owner HUBEI FIRSTA MATERIALS SCI & TECH GRP
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