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PE/TIE/PA/TIE/PE/EVA/PVDC/EVA/PE nine-layer co-extruded deep-drawing film

A PVDC and TIE technology, applied in the field of packaging materials, can solve problems such as the structure does not overcome the defects of the composite film

Inactive Publication Date: 2016-03-30
丹东全德高科技包装有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] GB / T28117-2011 discloses some PVDC co-extruded films, but the PVDC co-extruded films disclosed in this standard have a common feature, that is, the upper and lower adjacent layers of the PVDC layer use TIE, and TIE is a kind of adhesive resin. Its structure does not overcome the defects of composite membranes

Method used

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  • PE/TIE/PA/TIE/PE/EVA/PVDC/EVA/PE nine-layer co-extruded deep-drawing film
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  • PE/TIE/PA/TIE/PE/EVA/PVDC/EVA/PE nine-layer co-extruded deep-drawing film

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Embodiment Construction

[0015] The present invention is specifically described below in conjunction with accompanying drawing, and the structure of 5 layers of co-extruded stretched film is as follows: figure 1 As shown, from outside to inside are PP or PE, EVA, PVDC, EVA, PE. The present invention adopts a kind of PVDC multi-layer co-extrusion mold to prepare, as figure 2 , image 3 As shown, the mold has a plurality of ring-shaped or tapered core columns, and multiple layers of mold layers for extruding different materials are arranged on the periphery of the core columns; flow channel; PVDC layer 203 adopts multi-entrance flow channel 2031 design, and three flow channels 2031 form a spiral shape at the center; make the raw material of each extruder of PVDC within 1 / 3 to the circumference during the molding process That's it. Other numbers of channels can also be used, such as 2, 4, etc., which can be set according to the thickness of the film and the number of layers.

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Abstract

The invention discloses PE / TIE / PA / TIE / PE / EVA / PVDC / EVA / PE nine-layer co-extruded deep-drawing film. The film comprises PE, TIE, PA, TIE, PE, EVA, PVDC, EVA and PE in order from outside to inside. The film is advantageous in that the EVA layers are disposed at two sides of the PVDC layer so as to overcome an abovementioned adhesive-containing defect, the drawing depth reaches 8 cm, and the film is used for product packages having deep-drawing high-strength requirements, and can be used for light packages of meat products and packages of marine products and dairy products.

Description

technical field [0001] The invention relates to the field of packaging materials, specifically a film, more specifically a co-extruded film. Background technique [0002] In the processing of film, one raw material is extruded onto another film that has been made or different types of films that have been made are bonded together to form a multilayer film. This product is called a composite film. Most of the materials of the composite film are plastic, but paper, metal foil (usually aluminum) or fabric can also be used. The basic requirement of the composite film is to have good adhesion between the layers to ensure the overall mechanical properties of the package. In addition, composite films are mostly used for food packaging. Adhesives are used in the processing of composite films, and the choice of solvent and bonding process must meet the corresponding hygienic standards. [0003] The co-extrusion film has most of the characteristics of the composite film. Since the l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/08B32B27/32B32B27/30B32B27/34
Inventor 须建
Owner 丹东全德高科技包装有限公司
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