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Propylene polymer- ethene polymer multi-layer composite membrane, preparation method therefor, applications thereof and product thereof

A multi-layer composite film and polymer technology, applied in the field of composite materials, can solve problems such as poor solvent resistance, high cost, and large specificity of BOPET film and BOPA film

Active Publication Date: 2014-11-19
ZHEJIANG ZHONGCHENG PACKING MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, BOPET film and BOPA film have large specificity, high cost and poor solvent resistance.

Method used

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  • Propylene polymer- ethene polymer multi-layer composite membrane, preparation method therefor, applications thereof and product thereof
  • Propylene polymer- ethene polymer multi-layer composite membrane, preparation method therefor, applications thereof and product thereof
  • Propylene polymer- ethene polymer multi-layer composite membrane, preparation method therefor, applications thereof and product thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0124] Example 1: AXBXCXD type structure, layer thickness distribution: 33μm / 2μm / 10μm / 2μm / 33μm / 2μm / 10μm

[0125] Both layer A and layer C are made of polypropylene copolymer containing ethylene, the ethylene content is 0.35wt%, the molecular weight distribution is 5.5, the melt index is 2.8g / 10min, and the isotacticity is 95.6%.

[0126] Layer B and D use high-density polyethylene with a density of 0.955g / cm 3 , melting point is 135°C, and melt index is 3.8g / 10min.

[0127] The layer A is processed by the biaxial stretching process of the flat sheet method, wherein the transverse stretching ratio is 9 times, and the longitudinal stretching ratio is 1 time.

[0128] The C layer is processed by the biaxial stretching process of the flat sheet method, wherein the transverse stretching ratio is 1 time, and the longitudinal stretching ratio is 9 times.

[0129] The B layer is processed by the biaxial stretching process of the flat sheet method, wherein the transverse stretching r...

Embodiment 2

[0133] Example 2: AXBXCXD type structure, layer thickness distribution: 38μm / 2μm / 30μm / 2μm / 38μm / 2μm / 30μm

[0134] Both layer A and layer C are made of polypropylene copolymer containing ethylene, the ethylene content is 0.35wt%, the molecular weight distribution is 5.5, the melt index is 2.8g / 10min, and the isotacticity is 95.6%.

[0135] Layer B and D are high-density polyethylene with a density of 0.955g / cm3 , melting point is 135°C, and melt index is 3.8g / 10min.

[0136] A layer, B layer, C layer and D layer all add petroleum resin respectively, and the petroleum resin addition is 10% weight of each layer gross weight.

[0137] The layer A is processed by the biaxial stretching process of the flat sheet method, wherein the transverse stretching ratio is 8 times, and the longitudinal stretching ratio is 5 times.

[0138] The C layer is processed by the biaxial stretching process of the flat sheet method, wherein the transverse stretching ratio is 5 times, and the longitudina...

Embodiment 3

[0143] Example 3: AXBXCXD type structure, layer thickness distribution: 23μm / 2μm / 10μm / 2μm / 23μm / 2μm / 10μm

[0144] Layer A is low-density polyethylene with a density of 0.916g / cm 3 , The melt index is 2.8g / 10min. Layer C is low-density polyethylene with a density of 0.916g / cm 3 , The melt index is 2.8g / 10min.

[0145] Layers B and D are polypropylene copolymers containing ethylene, the ethylene content is 0.35wt%, the molecular weight distribution is 5.5, and the melt index is 2.8g / 10min.

[0146] The layer A is processed by the biaxial stretching process of the flat sheet method, wherein the transverse stretching ratio is 8 times, and the longitudinal stretching ratio is 5 times.

[0147] The C layer is processed by the biaxial stretching process of the flat sheet method, wherein the transverse stretching ratio is 5 times, and the longitudinal stretching ratio is 8 times.

[0148] The B layer is processed by the biaxial stretching process of the flat sheet method, wherein t...

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Abstract

The invention provides a multi-layer composite membrane. The multi-layer composite membrane comprises an AXBXCXD-layer structure. Two layers of the A layer, the B layer, the C layer and the D layer in the layer structure contain the same propylene polymer or different propylene polymers and the other two layers contain the same ethene polymer or different ethene polymers. The X layers are binder layers. The A layer, the B layer, the C layer and the D layer are subjected to two-way stretch. The invention also provides a preparation method for the multi-layer composite membrane, applications and a product containing the multi-layer composite membrane. The multi-layer composite membrane has performances of high stiffness, high transparency, low temperature resistance, high tearing intensity and the like.

Description

technical field [0001] The invention relates to a propylene polymer-ethylene polymer multilayer composite film, its preparation method and application thereof, and also relates to a product comprising the composite film, which belongs to the field of composite materials. Background technique [0002] Biaxially oriented polypropylene (BOPP) film is used in a wide range of fields represented by packaging materials by effectively utilizing its excellent properties such as light weight, transparency, mechanical strength, non-toxicity, moisture resistance, low air permeability, and rigidity. For example, it is widely used in the packaging and lamination of food, medicine, daily light industry, cigarettes and other products. One use of BOPP film is to stick to the surface of paper, such as books, packaging cartons, etc., to prevent moisture and increase surface gloss. [0003] BOPP film is generally a co-extrusion structure of 3-5 layers. The step-by-step stretching production pr...

Claims

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Application Information

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IPC IPC(8): B32B27/32B29C47/00B29C47/06B29C55/12
Inventor 陈大魁黄旭生詹越强谷汉进云小兵
Owner ZHEJIANG ZHONGCHENG PACKING MATERIAL
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