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Undrawn polyethylene film and preparation method thereof

A polyethylene film, high pressure polyethylene technology, applied in chemical instruments and methods, flexible coverings, types of packaging items, etc., can solve the problems of unfavorable food safety, fragile heat sealing ports, insufficient strength, etc., to avoid puncture Wear or scratches, reduced air permeability, good adhesion

Active Publication Date: 2017-05-31
广东铭丰新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current composite film packaging materials still often have relatively high moisture permeability, high air permeability, insufficient strength, and the heat-sealed port is fragile, often leaking, etc., which adversely affects food safety.

Method used

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  • Undrawn polyethylene film and preparation method thereof
  • Undrawn polyethylene film and preparation method thereof
  • Undrawn polyethylene film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031]In the unstretched polyethylene film, the thickness percentages of the heat-sealing layer 100, the first intermediate layer 200, the auxiliary layer 300, the second intermediate layer 400, and the corona layer 500 are respectively: 20%, 17.5% , 20%, 17.5%, 25%. Specifically, the heat-sealing layer 100 includes components by mass percentage: 20% high-pressure polyethylene, 30% linear polyethylene, 48% metallocene polyethylene, and 2% opening agent; the first intermediate layer 200 and the second The mass percentages of the components included in the second middle layer 400 are: 20% high pressure polyethylene, 30% low pressure polyethylene, 50% metallocene polyethylene; the mass percentages of the components included in the auxiliary layer 300 are: 40% high pressure polyethylene, 40% linear polyethylene 50% ethylene, 10% low-pressure polyethylene; the corona layer 500 includes components by mass percentage: 24% high-pressure polyethylene, 50% linear polyethylene, 25.8% met...

Embodiment 2

[0033] In the unstretched polyethylene film, the thickness percentages of each layer among the heat-sealing layer 100, the first intermediate layer 200, the auxiliary layer 300, the second intermediate layer 400, and the corona layer 500 are respectively: 20%, 20%, 20%, 15%, 25%. Specifically, the heat-sealing layer 100 includes the following mass percentages: 33% high-pressure polyethylene, 33% linear polyethylene, 33% metallocene polyethylene, and 1% anti-blocking agent; the first intermediate layer 200 and the second The mass percentages of the components included in the second middle layer 400 are: high pressure polyethylene 33%, low pressure polyethylene 33%, metallocene polyethylene 33%; the components mass percentages of the auxiliary layer 300 are: high pressure polyethylene 45%, linear polyethylene 50% ethylene, 5% low-pressure polyethylene; the corona layer 500 includes 25.9% high-pressure polyethylene, 50% linear polyethylene, 24% metallocene polyethylene and 0.1% t...

Embodiment 3

[0035] In the unstretched polyethylene film, the thickness percentages of each layer among the heat-sealing layer 100, the first intermediate layer 200, the auxiliary layer 300, the second intermediate layer 400, and the corona layer 500 are respectively: 25%, 15%, 20%, 15%, 25%. Specifically, the heat-sealing layer 100 includes the following mass percentages: 20% high-pressure polyethylene, 50% linear polyethylene, 25% metallocene polyethylene, and 5% anti-blocking agent; the first intermediate layer 200 and the second The mass percentage of components included in the second middle layer 400 is: 20% high pressure polyethylene, 50% low pressure polyethylene, 30% metallocene polyethylene; the mass percentage of components included in the auxiliary layer 300 is: 40% high pressure polyethylene, 40% linear polyethylene 50% ethylene, 10% low-pressure polyethylene; the corona layer 500 includes 30% high-pressure polyethylene, 39.82% linear polyethylene, 30% metallocene polyethylene ...

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Abstract

The invention discloses an undrawn polyethylene film and a preparation method thereof, and relates to the technical field of packaging film materials. The preparation method comprises the following steps: performing heating plastification on different layers of prepared components and raw materials, extruding, preparing a laminated-structure material by using a T-shaped mold head, and performing later treatment, thereby obtaining the undrawn polyethylene film finally. The undrawn polyethylene film comprises five layers, namely, a thermal sealing layer, a first middle layer, an auxiliary layer, a second middle layer and a corona layer for plating an aluminum membrane in sequence. The undrawn polyethylene film disclosed by the invention is large in strength, low in air permeability, low in damp permeability, good in plated aluminum adhesion property and good in thermal sealing property.

Description

technical field [0001] The invention relates to the technical field of film materials for packaging, in particular to an unstretched polyethylene film and a preparation method thereof. Background technique [0002] With the development of science and technology, plastic composite materials often have better physical and chemical properties than single composite materials, so they are more widely used. Cooked food packaging, frozen food packaging, vacuum packaging, etc. all require a large amount of composite film packaging materials. However, the current composite film packaging materials still often have relatively high moisture permeability, high air permeability, insufficient strength, and the heat-sealed port is fragile, often leaking, etc., which adversely affects food safety. [0003] It can be seen that the prior art still needs to be improved and enhanced. Contents of the invention [0004] In view of the deficiencies of the above-mentioned prior art, the object ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/32B32B15/085B65D65/40
CPCB32B15/085B32B27/08B32B27/32B32B2307/724B32B2307/726B32B2439/70B65D65/40
Inventor 钱昌旺
Owner 广东铭丰新材料科技有限公司
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