Polyethylene composite film as well as preparation method and application thereof

A polyethylene and composite film technology, which is applied in the field of polyethylene materials, can solve the problems that the stiffness and flatness of PE composite films cannot be met, and the stiffness of PE composite films has decreased.

Active Publication Date: 2021-06-18
江门市华龙膜材股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the current PE label film, the thickness of the PE composite film is generally above 70 μm. If the thickness is directly reduced, the stiffness of the PE composite film will drop significantly, which cannot meet the requirements of printing, gluing and labeling for the stiffness and flatness of the PE composite film.

Method used

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  • Polyethylene composite film as well as preparation method and application thereof
  • Polyethylene composite film as well as preparation method and application thereof
  • Polyethylene composite film as well as preparation method and application thereof

Examples

Experimental program
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preparation example Construction

[0049] The present invention also provides a preparation method for the polyethylene composite film described in the above technical solution, comprising the following steps:

[0050] After melting and plasticizing the raw materials of the surface layer, the middle layer and the inner layer, the three-layer blown film co-extrusion method is used to co-extrude the blown film to obtain the primary composite film;

[0051] The primary composite film is sequentially subjected to longitudinal stretching and corona treatment to obtain a polyethylene composite film.

[0052] In the present invention, each component in the preparation method is consistent with the components of the polyethylene composite film in the above technical solution, and will not be repeated here.

[0053] In the invention, the raw materials of the surface layer, the middle layer and the inner layer are melted and plasticized, and the three-layer blown film co-extrusion method is used to co-extrude the blown f...

Embodiment 1

[0069] In the polyethylene composite film prepared in this example, the mass ratio of the surface layer, the middle layer and the inner layer is 3:4:3; in terms of mass percentage, the surface layer includes 79% low-density polyethylene 2420H, 20% high-density polyethylene HD3355 and 1% of PA0801LD; by mass percentage, the middle layer includes 35% of low-density polyethylene 2420H, 12% of metallocene linear low-density polyethylene, 52% of high-density polyethylene H555JA and 1% of PA0801LD; by mass In percentage terms, the inner layer includes 79% low density polyethylene 2420H, 20% high density polyethylene HD3355 and 1% PA0801LD.

[0070] The preparation method is:

[0071] The raw materials of the surface layer, the middle layer and the inner layer are respectively mixed in proportion through the automatic batching system, and then sent to the extruder of the surface layer, the middle layer and the inner layer respectively, and the raw materials of the surface layer, the ...

Embodiment 2

[0076] In the polyethylene composite film prepared in this example, the mass ratio of the surface layer, the middle layer and the inner layer is 1:2:1, and the rest of the technical means are the same as in Example 1 to obtain a polyethylene composite film with a thickness of 40 μm.

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Abstract

The invention belongs to the technical field of polyethylene materials, and particularly relates to a polyethylene composite film as well as a preparation method and application thereof. The polyethylene composite film provided by the invention comprises a surface layer, a middle layer and an inner layer which are sequentially bonded; the surface layer comprises first low-density polyethylene, first high-density polyethylene and a first processing aid; the middle layer comprises second low-density polyethylene, metallocene linear low-density polyethylene, second high-density polyethylene and a second processing aid; the inner layer comprises third low-density polyethylene, third high-density polyethylene and a third processing aid; and the thickness of the polyethylene composite film is 40 microns. Experimental results show that the polyethylene composite film provided by the invention has both thinning and good stiffness.

Description

technical field [0001] The invention belongs to the technical field of polyethylene materials, and in particular relates to a polyethylene composite film and its preparation method and application. Background technique [0002] Label film is a kind of self-adhesive label, also called self-adhesive label material. It is a composite material with paper, film or special material as the fabric, adhesive on the back, and silicon-coated protective paper as the base paper. Among them, the polyethylene (PE) label film is a label film obtained from polyethylene material as a fabric. As environmental problems become increasingly prominent, reducing the use of plastic products from the source is crucial to environmental protection. For PE label films, reducing the thickness of PE film fabrics in PE label films can effectively reduce the amount of PE used. However, in the current PE label film, the thickness of the PE composite film is generally above 70 μm. If the thickness is directl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/32B32B27/06B32B27/08B32B33/00C08J5/18C08L23/06C08L23/08B29C48/00B29C48/10B29C48/21
CPCB32B27/32B32B27/327B32B27/08B32B33/00C08J5/18B29C48/0017B29C48/10B29C48/21B32B2250/242B32B2307/558B32B2307/734B32B2307/406B32B2307/51C08J2323/06C08J2423/06C08J2423/08
Inventor 文斌森魏洪媚
Owner 江门市华龙膜材股份有限公司
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