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High-barrier aluminized composite film and preparation method thereof

An aluminized composite film and high-barrier technology, applied in the field of packaging materials, can solve problems such as exacerbating the transfer of aluminized layers, and achieve the effects of improving interlayer peel strength, good heat sealing performance and mechanical strength, and reducing dosage

Active Publication Date: 2022-03-18
成都众恒印务有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in addition to the influence of the adhesive, since the composite film is composed of BOPP film, PET film and PE film, the molecular chain structure and performance of these films are quite different, so the stretching ratio between each layer Internal stress due to inconsistency will aggravate the transfer of the aluminum coating

Method used

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  • High-barrier aluminized composite film and preparation method thereof
  • High-barrier aluminized composite film and preparation method thereof
  • High-barrier aluminized composite film and preparation method thereof

Examples

Experimental program
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Effect test

preparation example 1- preparation example 7

[0047] The difference between Preparation Examples 1-7 lies in the difference in raw materials, and the raw materials are shown in Table 1, and Preparation Example 1 is taken as an example below for illustration.

[0048] The preparation method of the PE film that preparation example 1 provides comprises the steps:

[0049] Mixing: After blending the outer layer raw materials, middle layer raw materials and inner layer raw materials respectively, put them into the three-layer co-extrusion casting machine;

[0050] Melting: heat the three-layer co-extrusion casting machine in sections, the temperature of the first stage is 165°C, the temperature of the second stage is 190°C, the temperature of the third stage is 220°C, and the temperature of the die head is 225°C; After the heads meet, they are extruded through the die lip;

[0051] Casting: Set the temperature of the casting roll to 25°C, and under the condition of a vacuum pressure of 0.8mbar, the extruded material is quench...

preparation example 8

[0056] The difference between this preparation example and preparation example 1 is that the thickness ratio of the outer layer, middle layer and inner layer of the PE film is 2:6:2.

preparation example 9

[0058] The difference between this preparation example and preparation example 1 is that the thickness ratio of the outer layer, middle layer and inner layer of the PE film is 1:6:3.

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Abstract

The invention relates to the field of packaging materials, and particularly discloses a high-barrier aluminized composite film and a preparation method thereof. A high-barrier aluminized composite film comprises a BOPP (biaxially-oriented polypropylene) printing film, an aluminized PET (polyethylene terephthalate) film and a PE (polyethylene) film, and the PE film comprises an outer layer, a middle layer and an inner layer; the aluminized surface of the aluminized PET film is compounded with the outer layer of the PE film through a second adhesive; the second adhesive is a solvent-free type polyurethane adhesive; the outer layer of the PE film is prepared from the following raw materials: a thermoplastic elastomer, POE (Polyolefin Elastomer), ethylene-methyl methacrylate copolymer and poly alpha-methylstyrene resin; the middle layer is prepared from copolymerized PP (polypropylene), LDPE (low-density polyethylene), LLDPE (linear low-density polyethylene), m-PE, an ethylene-methyl acrylate copolymer and a slipping agent; the raw materials of the inner layer comprise LDPE and m-PE. The high-barrier aluminized composite film can be used for food packaging and has the advantages of being good in barrier property, high in mechanical strength, not prone to stripping and layering and good in heat sealing property.

Description

technical field [0001] The application relates to the field of packaging materials, more specifically, it relates to a high-barrier aluminized composite film and a preparation method thereof. Background technique [0002] Aluminized film refers to a thin film in which aluminum vapor is deposited on the base film in a vacuum state; the currently used aluminized films mainly include polyester aluminized film (VMPET) and CPP aluminized film (VMCPP) ). Because aluminized film has good barrier properties and metallic luster appearance, it has developed rapidly in the field of flexible packaging in recent years. In order to obtain better packaging heat sealing performance, barrier performance and mechanical strength, the aluminized film can be combined with other films to obtain an aluminized composite film. [0003] Among the aluminum-coated composite films with three-layer structure, BOPP / VMPET / PE composite films are commonly used. The preparation method generally includes the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/32
CPCB32B27/32B32B27/36B32B27/08B32B33/00B32B7/12C08L53/02C08L23/12C08L23/06B29C65/52B29C66/45B65D65/40C08L2207/04C08L2207/066B29L2007/00B29L2009/00B32B2307/31C08L23/0815C08L23/0869C08L25/16Y02W30/80
Inventor 黄义军
Owner 成都众恒印务有限责任公司
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