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A propylene-based polymer-ethylene-based polymer multilayer composite film containing a composite adhesive layer, its preparation method, use and its products

A multi-layer composite film and olefin 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: 2016-08-24
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 propylene-based polymer-ethylene-based polymer multilayer composite film containing a composite adhesive layer, its preparation method, use and its products
  • A propylene-based polymer-ethylene-based polymer multilayer composite film containing a composite adhesive layer, its preparation method, use and its products
  • A propylene-based polymer-ethylene-based polymer multilayer composite film containing a composite adhesive layer, its preparation method, use and its products

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0181] Embodiment 1: AYBYAYB structure or AYBYBYA structure,

[0182] Layer thickness distribution: 19 μm / 2 μm / 19 μm / 2 μm / 19 μm / 2 μm / 19 μm.

[0183] Layer A is made of 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 96.2%.

[0184] Layer B is made of high-density polyethylene with a density of 0.955g / cm 3 , melting point is 135°C, and melt index is 3.8g / 10min.

[0185] A layer and B layer all add petroleum resin respectively, and the petroleum resin addition is 10% weight of each layer gross weight.

[0186] The Y layer is a copolymer of polypropylene, containing ethylene and butene comonomers, and its melting point (measured by DSC) is 103°C.

[0187] Prepare AY a Layer: The sheet is prepared by multi-layer co-extrusion, and then processed by the flat sheet method step-by-step biaxial stretching process, in which the transverse stretching ratio is 9 ti...

Embodiment 2

[0193] Embodiment 2: AYBYAYB structure or AYBYBYA structure,

[0194] Layer thickness distribution: 28μm / 2μm / 28μm / 2μm / 28μm / 2μm / 28μm.

[0195] The layer A is all processed by 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%.

[0196] Layer B is made of high-density polyethylene with a density of 0.955g / cm 3 , melting point is 135°C, and melt index is 3.8g / 10min.

[0197] Y is ultra-low density polyethylene, containing octene comonomer, with a melting point of 90.2°C.

[0198] The AYBYAYB layer or AYBYBYA 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 12.5 times, and the longitudinal stretching ratio is 12.5 times.

[0199] The thickness of layer A is 28 μm, the thickness of layer B is 28 μm, the thickness of Y ...

Embodiment 3

[0202] Example 3: AYBYAYBYA structure,

[0203] Layer thickness distribution: 9μm / 1μm / 14μm / 1μm / 9μm / 1μm / 14μm / 1μm / 9μm.

[0204] 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%. Layer B is low-density polyethylene with a density of 0.916g / cm 3 , The melt index is 2.8g / 10min.

[0205] A layer and B layer all add petroleum resin respectively, and the petroleum resin addition is 30% weight of each layer gross weight.

[0206] Y is a copolymer of polypropylene, containing ethylene and butene comonomers, and its melting point (measured by DSC) is 103°C.

[0207] AYBYAYBYA is prepared by multi-layer co-extrusion, and the above-mentioned co-extrusion layer is processed by a flat-sheet biaxial stretching process, wherein the transverse stretching ratio is 6 times, and the longitudinal stretching ratio is 6 times.

[0208] The thickness of layer A is 9 μm, the thickness of layer B is 14 μm, the ...

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Abstract

The present invention provides a multi-layer composite film, which includes a layer structure composed of n AYB layer structures through Y, n is greater than or equal to 2, each A is the same or different, each B is the same or different, and each Y is the same or Different, wherein, the A layers in the layer structure each independently include the same or different propylene-based polymers, the B layers each independently include the same or different ethylene-based polymers, Y is a composite adhesive layer, selected from the melting point Olefin polymers below 130°C. The present invention also provides the preparation method of the above-mentioned multilayer composite film, its application and products containing the multilayer composite film. The propylene polymer-ethylene polymer multilayer composite film of the invention has properties such as high stiffness, high transparency, low temperature resistance, and high tear strength.

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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Patent Type & Authority Patents(China)
IPC IPC(8): B32B27/08B32B27/32B32B7/12B32B37/10B29C69/00B42D3/02B42D25/20B42D25/29B65D65/40
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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