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Biaxially oriented polypropylene adhesive-free film

A technology of biaxial stretching and polyethylene, applied in the field of film for packaging, can solve the problems of high thermal lamination temperature and poor toughness, and achieve the effect of good puncture resistance

Inactive Publication Date: 2010-06-09
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 films used for packaging (such as biaxially oriented polypropylene films) have the following shortcomings: high thermal lamination temperature, poor toughness

Method used

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  • Biaxially oriented polypropylene adhesive-free film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Such as figure 1 As shown, the biaxially oriented polyethylene non-adhesive film is composed of a surface layer 1, a core layer 2 and a subsurface layer 3, the core layer 2 is located between the surface layer 1 and the subsurface layer 3, and the surface layer 1, core layer 2 and subsurface layer 3 are made of After co-extrusion, it is formed into one body by biaxial stretching (extrusion temperature is 180-230°C, using the existing co-extrusion and biaxial stretching process);

[0014] The material of the surface layer 1 is composed of low-density polyethylene, anti-sticking agent and slippery agent, and the mass percentage of each component is: 90% of low-density polyethylene, 5% of anti-sticking agent, and 5% of slippery agent;

[0015] The material of the core layer 2 is composed of low-density polyethylene, metallocene polyethylene and EPDM rubber, and the mass percentages of each component are: 50% of low-density polyethylene, 40% of metallocene polyethylene, ter...

Embodiment 2

[0026] It is basically the same as Example 1, except that the anti-adhesive agent is talc, and the slippery agent is fatty acid ester.

Embodiment 3

[0028] It is basically the same as Example 1, except that the anti-sticking agent is talc, the slippery agent is oleic acid amide, and the antioxidant is phenol (all of which are applicable to the present invention).

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Abstract

The invention belongs to the technical field of packaging materials, in particular to a film for packaging. The biaxially oriented polypropylene adhesive-free film is characterized by consisting of a surface layer, a core layer and a secondary surface layer, wherein the core layer is positioned between the surface layer and the secondary surface layer; the surface layer, the core layer and the secondary surface layer are co-extruded and form a whole by biaxial tension; the material of the surface layer consists of the following components in percentage by weight: 90 percent of low-density polythene, 5 percent of anti-adhesive agent and 5 percent of slipping agent; the core layer is made of low-density polythene, metallocene polyethylene and ethylene propylene diene methylene; and the secondary surface layer is made of ethylene-polythene copolymer, paraffin, hydrogenated resin, low-density polythene and antioxidant. The invention has the characteristics of low compound temperature (60-95 DEG C) with paper and favorable puncture resistance.

Description

technical field [0001] The invention belongs to the technical field of packaging materials, and in particular relates to a packaging film. Background technique [0002] At present, the films used for packaging (such as biaxially oriented polypropylene films) have the following disadvantages: high thermal lamination temperature and poor toughness. Contents of the invention [0003] The purpose of the present invention is to provide a biaxially stretched polyethylene adhesive-free film with good puncture resistance. [0004] In order to achieve the above object, the technical solution of the present invention is: biaxially oriented polyethylene adhesive-free film, characterized in that: it consists of a surface layer, a core layer and a subsurface layer, the core layer is located between the surface layer and the subsurface layer, the surface layer, the core layer It is integrated with the subsurface layer by bidirectional stretching after co-extrusion; [0005] The materi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/30B32B27/18B65D65/40C08L23/06C08L23/08
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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