Seven-layer coextrusion composite high-separation packaging film

A technology of co-extrusion lamination and packaging film, applied in packaging, wrapping paper, transportation and packaging, etc., can solve the problems of waste of raw materials, puncture resistance, poor tensile strength and drop resistance, and achieve low cost, puncture resistance and tear resistance. The effect of strong cracking performance and strong performance

Inactive Publication Date: 2009-09-09
高永明
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In view of the above problems, the present invention provides a multi-layer co-extrusion c...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] The seven-layer structure of the seven-layer co-extruded composite high barrier packaging film is that (1) layer and (7) layer are PE, (2) and (6) layer are TIE, (3) layer and (5) layer are PA , (4) layer is EVOH. Proportion PE:TIE:PA:EVOH=60:10:25:5. The film thickness of the packaging film is 52 μm.

Embodiment 2

[0011] The seven-layer structure of the seven-layer co-extruded composite high barrier packaging film is that (1) layer and (7) layer are PE, (2) and (6) layer are TIE, (3) layer and (5) layer are PA , (4) layer is EVOH. Proportion PE:TIE:PA:EVOH=70:7:20:3. The film thickness of the packaging film is 60 μm.

Embodiment 3

[0013] The seven-layer structure of the seven-layer co-extruded composite high barrier packaging film is that (1) layer and (7) layer are PE, (2) and (6) layer are TIE, (3) layer and (5) layer are PA , (4) layer is EVOH. Proportion PE:TIE:PA:EVOH=80:6:10:4. The film thickness of the packaging film is 75 μm.

[0014] Compared with other barrier films, the seven-layer co-extruded composite high-barrier packaging film of the present invention has better cost performance.

[0015] See the table below:

[0016]

[0017] In the above table, the seven-layer co-extruded film is the seven-layer co-extruded composite high-barrier packaging film of the present invention.

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PUM

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Abstract

The invention relates to a seven-layer coextrusion composite high-separation packaging film which comprises polyethylene (PE) resin, ethane and vinyl alcohol copolymer (EVOH) resin, a connecting material (TIE) and polyamide (PA), each layer of the packaging film comprises one of the four kinds of resin, the thickness of the packaging film is -20-15 mu m, and the packaging film is processed by a coextrusion film blowing machine by adopting multilayer coextrusion composite technology. The seven-layer coextrusion composite high-separation packaging film has the advantages of high-separation gas tightness, environmental protection, high mechanical property, high explosion resistance, strong puncture resistance, strong tear resistance, oil resistance, moisture resistance, high-temperature cooking resistance, low-temperature refrigeration resistance, quality assurance, fresh preservation, odor preservation, low cost, good heat sealability, high flexibility and good transparency.

Description

technical field [0001] The invention relates to a flexible packaging material, in particular to a multi-layer composite high-barrier and anti-permeation food packaging film. Background technique [0002] Among plastic flexible packaging materials, food packaging is its largest application market. With the improvement of consumption level, the requirements for food packaging are becoming more and more stringent, which promotes the development of high-barrier multifunctional packaging film materials. In a general sense, the structure of packaging film products depends on the functional requirements of the packaging for the film. For food packaging, packaging materials generally must meet the following aspects of the market: 1. Oxygen can cause oxidative deterioration of fat and protein, so It must have an excellent ability to block oxygen; 2. Because the entry or volatilization of water vapor can cause changes in the taste of food, it must have excellent water vapor barrier ab...

Claims

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Application Information

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IPC IPC(8): B65D65/40B32B27/08
Inventor 高永明
Owner 高永明
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