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A kind of propylene-based polymer multilayer composite film, its preparation method, application and its products

A multi-layer composite film and composite film 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: 2015-12-02
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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  • A kind of propylene-based polymer multilayer composite film, its preparation method, application and its products
  • A kind of propylene-based polymer multilayer composite film, its preparation method, application and its products
  • A kind of propylene-based polymer multilayer composite film, its preparation method, application and its products

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0148] Embodiment 1: AXBXCXAXBXC structure or AXBXCXCXBXA structure,

[0149] Layer thickness distribution: 10μm / 1μm / 20μm / 1μm / 10μm / 1μm / 10μm / 1μm / 20μm / 1μm / 10μm

[0150] Layer A, layer B and layer C are all 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%.

[0151] A layer, B layer and C layer all add petroleum resin respectively, and the petroleum resin addition is 10% weight of each layer gross weight.

[0152] The layer A is 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 5 times, and the thickness is 10 μm.

[0153] The B layer is processed by the step-by-step biaxial stretching process of the flat sheet method, wherein the transverse stretching ratio is 5 times, the longitudinal stretching ratio is 9 times, and the...

Embodiment 2

[0156] Embodiment 2: AXBXCXAXBXC structure or AXBXCXCXBXA structure,

[0157] Layer thickness distribution: 8μm / 1μm / 16μm / 1μm / 8μm / 1μm / 8μm / 1μm / 16μm / 1μm / 8μm

[0158] Layer A, layer B and layer C are all 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%.

[0159] A layer, B layer and C layer all add petroleum resin respectively, and the petroleum resin addition is 15% weight of each layer gross weight.

[0160] Layer A is processed by the flat sheet method uniaxial stretching process, wherein the longitudinal stretching ratio is 12.5 times, and the thickness is 8 μm.

[0161] The B layer is processed by the flat sheet method uniaxial stretching process, wherein the transverse stretching ratio is 12.5 times and the thickness is 16 μm.

[0162] Layer C is processed by a flat-sheet uniaxial stretching process, wherein the longitudinal stretchi...

Embodiment 3

[0164] Example 3: AXBXCXAXBXC structure or AXBXCXCXBXA structure, layer thickness distribution:

[0165] 7.5μm / 1μm / 15μm / 1μm / 7.5μm / 1μm / 7.5μm / 1μm / 15μm / 1μm / 7.5μm

[0166] Layer A and layer C are propylene homopolymers with a molecular weight distribution of 5.1, a melt index of 2.8g / 10min, and an isotacticity of 96.2%. Layer B is a propylene copolymer containing ethylene, the ethylene content is 0.35wt%, the molecular weight distribution is 5.5, and the melt index is 2.8g / 10min.

[0167] A layer, B layer and C layer are all added hydrogenated petroleum resin respectively, and the added amount of hydrogenated petroleum resin is 20% by weight of the total weight of each layer.

[0168] The A layer is processed by the step-by-step biaxial stretching process of the tubular film method, in which the transverse stretching ratio is 8 times, the longitudinal stretching ratio is 5 times, and the thickness is 7.5 μm.

[0169] The B layer is processed by the step-by-step biaxial stretchin...

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Abstract

The invention provides a multi-layer composite film, comprising a layer structure formed by mutually compounding n AXBXC layer structures through X, wherein n is not less than 2, all the A are the same or different, all the B are the same or different, all the C are the same or different, all the X are the same or different, layers A, layers B and layers C in the layer structures respectively and independently comprise identical or different propylene-based polymers, X are binder layers, and the layers A, the layers B and the layers C are respectively and independently uniaxially stretched or biaxially stretched. The invention further provides a preparation method and use of the multi-layer composite film and a product containing the multi-layer composite film. The propylene-based polymer multi-layer composite film provided by the invention has high stiffness, high transparency, low temperature resistance, high tear strength and other performances.

Description

technical field [0001] The invention relates to a propylene-based polymer multilayer composite film, its preparation method, application and products containing the composite film, belonging 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 mainly consists of the following proce...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B27/32B32B7/12B32B27/18B29C69/02B29C47/00B29C55/02B29C65/52B65D65/40
Inventor 陈大魁黄旭生詹越强谷汉进云小兵
Owner ZHEJIANG ZHONGCHENG PACKING MATERIAL