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Linear unstretched polyethylene film easy to tear

A polyethylene film and polyethylene technology, which is applied to the types of packaging items, special packaging items, applications, etc., can solve the problems of irregular tearing openings, leakage of packaging contents, and difficulty in tearing with bare hands, achieving high sealing strength, The effect of regular tearing

Inactive Publication Date: 2016-02-10
安徽双津实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the development of science and technology, plastic packaging composite film is widely used as flexible packaging for food, medicine and daily chemical products because of its good heat sealing performance, excellent flexibility and puncture strength. Opening, it is difficult to tear with bare hands, or the tear opening is irregular and jagged after tearing, which may easily lead to the leakage of the package contents, especially when unstretched polyethylene film is used as the packaging material, the defect is more obvious
To this end, the industry usually needs to use special machinery or lasers to make tear openings or tear lines, but the sealing strength of the easily damaged film will lead to a decrease in barrier properties, thereby affecting the shelf life of the package

Method used

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Examples

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Effect test

Embodiment 1

[0028] The composition of the outer layer 1 is 3wt% linear low density polyethylene + 92wt% high density polyethylene + 5wt% smooth agent; the thickness of the outer layer 1 accounts for 20% of the total thickness of the film.

[0029] The composition of the middle layer 2 is 73wt% linear low density polyethylene + 5wt% low density polyethylene + 22wt% cycloolefin copolymer; the thickness of the middle layer 2 accounts for 60% of the total thickness of the film.

[0030] The composition of the inner surface layer 3 is 3wt% low-density polyethylene, 92wt% linear low-density polyethylene and 5wt% smooth agent; the thickness of the inner surface layer 3 accounts for 20% of the total thickness of the film.

Embodiment 2

[0032] The composition of the outer layer 1 is 1wt% linear low density polyethylene + 98wt% high density polyethylene + 1wt% smooth agent; the thickness of the outer layer 1 accounts for 30% of the total thickness of the film.

[0033] The composition of the middle layer 2 is 78wt% linear low density polyethylene + 2wt% low density polyethylene + 20wt% cycloolefin copolymer; the thickness of the middle layer 2 accounts for 40% of the total thickness of the film.

[0034] The composition of the inner surface layer 3 is 2wt% low-density polyethylene, 96wt% linear low-density polyethylene and 2wt% slippery agent; the thickness of the inner surface layer 3 accounts for 30% of the total thickness of the film.

Embodiment 3

[0036] The composition of the outer layer 1 is 99wt% high-density polyethylene + 1wt% smooth agent; the thickness of the outer layer 1 accounts for 60% of the total thickness of the film.

[0037] The composition of the middle layer 2 is 82wt% linear low density polyethylene + 18wt% cycloolefin copolymer; the thickness of the middle layer 2 accounts for 10% of the total thickness of the film.

[0038] The composition of the inner surface layer 3 is 99wt% linear low density polyethylene and 1wt% smooth agent; the thickness of the inner surface layer 3 accounts for 30% of the total thickness of the film.

[0039] Wherein the main material that the present invention chooses, linear low-density polyethylene is Mobil 1002YB type, does not contain anti-adhesive agent and smooth agent, or Hanwha 3224 type contains anti-adhesive agent and smooth agent; Low-density polyethylene is Qatar Petrochemical FD0274, Contain anti-adhesive and slip agent, or Qatar Petrochemical FD0270, without a...

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Abstract

The invention provides a linear unstretched polyethylene film easy to tear, and relates to the technical field of films. The linear unstretched polyethylene film easy to tear is of a three-layer compound structure comprising an outer surface layer, a middle layer and an inner surface layer. The outer surface layer is mainly prepared from one or a mixture of at least two of linear low-density polyethylene, low-density polyethylene, high-density polyethylene and medium-density polyethylene; the middle layer is mainly prepared from low-density polyethylene and / or linear low-density polyethylene and cyclic olefin copolymers; the inner surface layer is mainly prepared from one or a mixture of at least two of metallocene polyethylene, linear low-density polyethylene and low-density polyethylene. The linear unstretched polyethylene film easy to tear can overcome the defect that an existing film is difficult to tear or a torn opening is in a zigzag shape.

Description

technical field [0001] The invention relates to the field of film technology, in particular to a linear easy-tear unstretched polyethylene film. Background technique [0002] With the development of science and technology, plastic packaging composite film is widely used as flexible packaging for food, medicine and daily chemical products because of its good heat sealing performance, excellent flexibility and puncture strength. Opening, it is difficult to tear with bare hands, or the tear opening is irregular and jagged after tearing, which may easily lead to the leakage of the package contents, especially when unstretched polyethylene film is used as the packaging material, the defect is more obvious. To this end, the industry usually needs to use special machinery or lasers to make tear openings or tear lines, but the sealing strength of the easily damaged film will lead to a decrease in barrier properties, thereby affecting the shelf life of the package. [0003] Therefor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/32B32B27/18
CPCB32B27/32B32B27/18B32B2439/70B32B2439/80
Inventor 唐健王帮新张治国
Owner 安徽双津实业有限公司
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