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

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

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0143] Example 1: AYB structure, layer thickness distribution: 39μm / 2μm / 39μm

[0144] Layer A is processed from propylene 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%. Layer B is high-density polyethylene with a density of 0.955g / cm3, a melting point of 140°C, and a melt index of 2.8g / 10min.

[0145] The Y layer is a copolymer of polypropylene, containing ethylene and butene comonomers, having a melting point (as determined by DSC) of 103°C.

[0146] Prepare AY a Layer: The sheet is prepared by multi-layer co-extrusion, and then processed by the step-by-step biaxial stretching process of the flat sheet method, wherein the transverse stretching ratio is 9 times, the longitudinal stretching ratio is 9 times, the thickness of the A layer is 39 μm, and the Y a The layer thickness is 1 μm.

[0147] Preparation Y b B layer: The sheet is prepared by multi-layer...

Embodiment 2

[0150] Example 2: AYB structure, layer thickness distribution: 59 μm / 2 μm / 59 μm

[0151] Layer A is processed from propylene 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%. Layer B is high-density polyethylene with a density of 0.955g / cm3, a melting point of 135°C, and a melt index of 3.8g / 10min.

[0152] Y is ultra-low density polyethylene, containing octene comonomer, with a melting point of 90.2°C.

[0153] The AYB layer was prepared by multi-layer co-extrusion, and the above-mentioned co-extruded layer was processed by the biaxial stretching process of the flat sheet method, wherein the transverse stretching ratio was 12.5 times, and the longitudinal stretching ratio was 12.5 times.

[0154] The thickness of layer A is 59 μm, the thickness of layer B is 59 μm, the thickness of Y is 2 μm, and the total thickness of the film is 120 μm.

[0155] The composi...

Embodiment 3

[0157] Example 3: AYBYA' product structure, layer thickness distribution: 33 μm / 2 μm / 10 μm / 2 μm / 33 μm.

[0158] Layer A is a propylene 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%. Layer B is high-density polyethylene with a density of 0.955g / cm3, a melting point of 140°C, and a melt index of 2.8g / 10min. Layer A' is a propylene homopolymer with a molecular weight distribution of 5.1, a melt index of 2.8 g / 10 min and an isotacticity of 96.2%.

[0159] Y is a copolymer of ethylene and vinyl acetate with a melting point of 86°C.

[0160] The AYBYA' layer is prepared by multi-layer co-extrusion, and the above-mentioned co-extruded layer is processed by a flat sheet biaxial stretching process, wherein the transverse stretching ratio is 9 times, and the longitudinal stretching ratio is 9 times.

[0161] The thickness of layer A is 33 μm, the thickness of layer B...

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Abstract

The invention provides a multi-layer composite membrane. The multi-layer composite membrane comprises an AYB-layer structure. The A layer in the layer structure contains a propylene polymer, the B layer contains an ethene polymer, and the Y layer is a binder layer selected from olefin polymers with a melting point being lower than 130 DEG C. 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-based polymer multilayer composite film, a preparation method and an application thereof, and also relates to a product containing 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 process main...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/08B32B27/32B29C69/02B29C55/12
Inventor 陈大魁黄旭生詹越强谷汉进云小兵
Owner ZHEJIANG ZHONGCHENG PACKING MATERIAL