High-tensile composite film and preparation method thereof

A composite film and thin film technology, which is applied to chemical instruments and methods, flat products, and other household appliances, etc., can solve problems affecting the normal use of the film, local fractures, etc., to increase the packaging effect, reduce the possibility of fracture, and improve tensile strength. The effect of elongation and toughness

Inactive Publication Date: 2020-01-03
NINGBO HONGYAN PACKING MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the high-tensile plastic film packs irregular items with many water chestnuts, such as packing wood and steel, it is prone to local fracture, which affects the normal use of the film.

Method used

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  • High-tensile composite film and preparation method thereof
  • High-tensile composite film and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment Embodiment 1

[0059] A high-stretch composite film, composed of seven layers of film, with a thickness of 15 μm, including:

[0060] The first layer of film has a thickness of 10% of the composite film, including the following components in parts by weight: 50 parts of polyethylene 2010, 30 parts of polyethylene 6202 and 2 parts of ABS;

[0061] The second layer of film, the thickness of which is 10% of the composite film, includes the following components in parts by weight: 50 parts of polyethylene 3518, 30 parts of polyethylene 4404 and 4 parts of polypropylene resin W725;

[0062] The third layer of film has a thickness of 15% of the composite film, including the following components in parts by weight: 60 parts of polyethylene 3518, 20 parts of polyethylene 2607 and 2 parts of polypropylene resin W725;

[0063] The fourth layer of film has a thickness of 30% of the composite film, including the following components in parts by weight: 50 parts of polyethylene 3518, 25 parts of polyethy...

Embodiment 2-5

[0074] In Examples 2-5, on the basis of the method in Example 1, the components and dosage of the composite membrane were adjusted, and the specific adjustments are shown in Table 1 below.

[0075] Components and consumption of the composite membrane of table 1 embodiment 1-5

[0076]

Embodiment 6

[0078] In this embodiment, on the basis of the method in Example 1, 2-5 parts of tackifying masterbatch PIB60 are added to the first layer of film and the seventh layer of film respectively, specifically taking the addition of 2 parts as an example.

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Abstract

The invention relates to the technical field of films, particularly to a high-tensile composite film and a preparation method thereof. The high-tensile composite film is formed by compounding seven layers of thin films and has a thickness of 15-23 microns, wherein each layer of thin film contains metallocene polypropylene and general-purpose polyethylene in a certain ratio, corresponding auxiliaries are cooperatively utilized, and thin film melting, melt pressing, casting melt curing and primary product slitting are conducted to prepare the high-tensile composite film. The tensile length of the prepared composite film can reach 5 times of the original length, so the composite film has excellent tensile strength and tensile property; and the possibility of breakage of the composite film inthe packaging process is effectively reduced.

Description

technical field [0001] The invention relates to the field of film technology, in particular to a high-stretch composite film and a preparation method thereof. Background technique [0002] The film types include single-layer film and composite film. The disadvantages of single-layer film such as low mechanical strength and surface hardness, flammability and poor heat resistance limit its application range, and the co-extrusion film market is relatively broad. Among them, the multi-layer co-extrusion technology is to use more than 3 extruders to melt and extrude resin materials with different functions, such as PA, PE, PP, etc. Forming and cooling to obtain a composite film. [0003] For example, the Chinese patent with the application number CN201310637906.X discloses a high-tensile plastic film, which adopts a three-layer structure, in which PP and metallocene are co-fused, so as to achieve the purpose of high tensile strength. However, when the high-tensile plastic film ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/32B32B27/06B32B27/08B32B27/18B32B33/00B65D65/40B29C48/18B29D7/01
CPCB32B27/32B32B27/327B32B27/08B32B27/18B32B33/00B65D65/40B29C48/18B29D7/01B32B2250/242B32B2307/54B32B2307/5825B32B2307/558B32B2553/00
Inventor 李辉
Owner NINGBO HONGYAN PACKING MATERIAL
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