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A multilayer-structure membrane

A multi-layer structure and outer layer technology, which is applied in the field of preparation of multi-layer structure films, can solve problems such as poor puncture resistance and drop resistance

Inactive Publication Date: 2016-07-06
东莞奇妙包装有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

NY / PE or NY / CPE composite structure and PE / PE composite structure generally have the problems of poor puncture resistance and poor drop resistance after vacuuming

Method used

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  • A multilayer-structure membrane
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  • A multilayer-structure membrane

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0043] The preparation method of multilayer structure film

[0044] The multilayer structure film according to the present invention can be prepared by any suitable method, for example, by die coextrusion, extrusion coating and / or film extrusion lamination, adhesive lamination, blown film coextrusion, etc. .

[0045] In order to maximize the advantages of the multilayer structure film according to the present invention, the multilayer structure film of the present invention can be prepared by, but not limited to, the following method: at least the first polyethylene layer, the second polyethylene layer, the first polyethylene layer An amide layer and a second polyamide layer are coextruded and bonded together, wherein at least one of the first polyamide layer and the second polyamide layer is located between the first polyethylene layer and the second polyamide layer. between layers of polyethylene.

[0046] In a preferred embodiment, the method of the present invention prov...

Embodiment

[0053] Some specific implementations of the present invention are explained below in conjunction with examples, so that those skilled in the art can more clearly understand the technical solutions and advantages of the present invention, but do not limit the present invention in any way.

[0054] 1. Materials

[0055] Comparative examples and example samples of multilayer structure films were prepared using the following materials.

[0056]

[0057]

[0058] 2. Preparation of multilayer structure film

Embodiment 1

[0069] A PE / PA nine-layer co-extrusion film with a thickness of 80 μm was prepared by ReifenHouser SW2200 multi-layer co-extrusion blown film equipment. The die temperature of each layer was 220°C. The structure of the PE / PA nine-layer co-extrusion film and the composition of each layer and the layer thickness ratio based on the total thickness of the co-extrusion film are as follows:

[0070]

[0071] The outer layer of biaxially oriented polyamide with a thickness of 15 μm was processed by Taiwan Sanxia DL-S1300 dry lamination machine The first layer of B40L and the above PE three-layer co-extruded film is passed through the polyurethane adhesive XH-750E at 3.6g / m 2 The amount of gluing is bonded together, and then cured at a temperature of 55°C for 48h. The thickness of the polyurethane adhesive in the obtained multilayer structure film was 2 μm.

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Abstract

The invention relates to a multilayer-structure membrane. The multilayer-structure membrane at least comprises a first polyethylene layer, a second polyethylene layer, a first polyamide layer and a second polyamide layer which are co-extruded and adhered, wherein the at least one of the first and second polyamide layers are disposed between the first and second polyethylene layers. The invention also relates to a preparing method and uses of the multilayer-structure membrane.

Description

technical field [0001] The invention relates to a multilayer structure film. In particular, the present invention relates to a multilayer structured film useful for food packaging, especially for packaging of granular substances such as rice. The invention also relates to the preparation method and application of the multilayer structure film. Background technique [0002] Plastic packaging films are known for their lightness and airtightness in the field of food packaging. In the packaging of granular materials such as rice, plastic packaging bags are more popular because they are superior to traditional woven bags in terms of appearance and moisture and insect resistance. Moreover, due to the airtightness of the plastic packaging film, vacuuming can be performed, thereby further compressing the volume of the contained material such as rice and prolonging its storage shelf life. [0003] Because of its particularity, rice puts forward higher requirements for packaging fi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/08B32B27/32B32B27/34B32B27/06B32B7/12
Inventor 金伟
Owner 东莞奇妙包装有限公司