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Toughening type three-layer coextru-laminated film and preparation method thereof

A three-layer co-extrusion, composite film technology, applied in chemical instruments and methods, layered products, synthetic resin layered products, etc., can solve the problems of inflatable products that cannot be packaged with nitrogen and insufficient toughness of cast polypropylene films, etc. Achieve the effect of improving impact strength and toughness and reducing heat sealing temperature

Active Publication Date: 2010-12-15
KAIDA GRP CO LTD FJ
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

[0003] The existing three-layer co-extrusion composite film is mostly cast polypropylene film (CPP), which is made of common polypropylene (PP) raw material through three-layer co-extrusion of casting machine. This common PP film The raw material determines that the cast polypropylene film (CPP) is not tough enough and cannot be used for the packaging of nitrogen inflated products

Method used

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Embodiment Construction

[0013] The toughened three-layer co-extrusion composite film of the present invention is formed by three-layer co-extrusion of a flow casting machine, and has an outer layer, a middle layer and an inner layer compounded together.

[0014] The material of the middle layer adopts polypropylene hydrocarbon elastomer and polypropylene with a weight ratio of 1:10-1:3; wherein, the melt index of the polypropylene hydrocarbon elastomer is 6-12; as a preferred embodiment, the polypropylene hydrocarbon elastomer and polypropylene The weight ratio of propylene can be 1:10 or 1:5 or 1:3.

[0015] The inner layer material adopts terpolymerized polypropylene and metallocene low-density polyethylene with a weight ratio of 1:10-1:1; wherein, the melt index of terpolymerized polypropylene and metallocene low-density polyethylene is both 6-12 ; As a preferred embodiment, the weight ratio of terpolymerized polypropylene and metallocene low-density polyethylene can be 1:5 or 1:3 or 1:2.

[0016...

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Abstract

The invention discloses a toughening type three-layer coextru-laminated film and a preparation method thereof. The film is co-extruded by three layers through a casting machine and is provided with an outer layer, a middle layer and an inner layer which are laminated together, wherein the middle layer is made of polypropylene hydrocarbon elastomer and polypropylene in a weight ratio of 1:10 to 1:3; and the melt index of the polypropylene hydrocarbon elastomer is between 6 and 12. In the toughening type three-layer coextru-laminated film, the middle layer is prepared by blending or co-extruding the polypropylene hydrocarbon elastomer and the polypropylene after the scheme is adopted. Compared with the conventional CPP film, the toughening type three-layer coextru-laminated film improves impact resistance strength and toughness of the laminated film, does not influence the barrier property of the laminated film, and is particularly suitable for packing oily nitrogen charging products such as eggs, bread and the like.

Description

technical field [0001] The invention relates to a three-layer co-extruded composite film, in particular to a toughened three-layer co-extruded composite film and a preparation method thereof. Background technique [0002] At present, three-layer co-extruded composite films have been widely used in food, medicine, chemical and other fields, among which food packaging accounts for the largest proportion, such as beverage packaging, quick-frozen food packaging, cooking food packaging, fast food packaging, etc. These products All have brought great convenience to people's life. [0003] The existing three-layer co-extrusion composite film is mostly cast polypropylene film (CPP), which is made of common polypropylene (PP) raw material through three-layer co-extrusion of casting machine. This common PP film The raw material determines that the cast polypropylene film (CPP) is not tough enough to be used for the packaging of nitrogen inflated products. Contents of the invention ...

Claims

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Application Information

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IPC IPC(8): B32B27/08B32B27/32B29C47/06B29C71/04
Inventor 吕文艺
Owner KAIDA GRP CO LTD FJ
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