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Multilayer propylene polymer and ethylene polymer composite membrane, preparation method and application of multilayer composite membrane, and products containing multilayer composite membrane

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

Active Publication Date: 2016-07-20
ZHEJIANG ZHONGCHENG PACKING MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • Multilayer propylene polymer and ethylene polymer composite membrane, preparation method and application of multilayer composite membrane, and products containing multilayer composite membrane
  • Multilayer propylene polymer and ethylene polymer composite membrane, preparation method and application of multilayer composite membrane, and products containing multilayer composite membrane
  • Multilayer propylene polymer and ethylene polymer composite membrane, preparation method and application of multilayer composite membrane, and products containing multilayer composite membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0192] Embodiment 1: AXBXCXAXBXC structure or AXBXCXCXBXA structure,

[0193] Layer thickness distribution: 10μm / 1μm / 20μm / 1μm / 10μm / 1μm / 10μm / 1μm / 20μm / 1μm / 10μm

[0194] Both layer A and layer C are processed by using 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%.

[0195] Layer B is made of high-density polyethylene with a density of 0.955g / cm 3 , the melting point is 135°C, and the melt index is 3.8g / 10min.

[0196] A layer, B layer and C layer all add petroleum resin respectively, and the amount of petroleum resin added is 10% by weight of the total weight of each layer.

[0197] The two A layers are all 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.

[0198] The two B layers are processed...

Embodiment 2

[0201] Embodiment 2: AXBXCXAXBXC structure or AXBXCXCXBXA structure,

[0202] Layer thickness distribution: 8μm / 1μm / 16μm / 1μm / 8μm / 1μm / 8μm / 1μm / 16μm / 1μm / 8μm

[0203] Both layer A and layer C are processed by using 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%.

[0204] Layer B is made of high-density polyethylene with a density of 0.955g / cm 3 , the melting point is 135°C, and the melt index is 3.8g / 10min.

[0205] A layer, B layer and C layer all add petroleum resin respectively, and the amount of petroleum resin added is 15% by weight of the total weight of each layer.

[0206] Both A-layers are processed by the flat sheet method uniaxial stretching process, wherein the longitudinal stretching ratio is 12.5 times and the thickness is 8 μm.

[0207] The two B layers are all processed by flat sheet method uniaxial stretching process, wherein the tran...

Embodiment 3

[0210] Example 3: AXBXCXAXBXC structure or AXBXCXCXBXA structure, layer thickness distribution: 7.5 μm / 1 μm / 15 μm / 1 μm / 7.5 μm / 1 μm / 7.5 μm / 1 μm / 15 μm / 1 μm / 7.5 μm

[0211] Layer A and layer C are propylene homopolymers with a molecular weight distribution of 5.1, a melt index of 2.8 g / 10 min, and an isotacticity of 96.2%.

[0212] Layer B is low-density polyethylene with a density of 0.916g / cm 3 , The melt index is 2.8g / 10min.

[0213] A layer, B layer and C layer are respectively added with hydrogenated petroleum resin, and the added amount of hydrogenated petroleum resin is 20% by weight of the total weight of each layer.

[0214] The two A layers are 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.

[0215] The two B layers are processed by the step-by-step biaxial stretching process of the tubular film method, i...

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Abstract

The invention provides a multilayer composite membrane. The multilayer composite membrane comprises a layer structure formed by n AXBXC layer structures which are mutually composited through X(s), wherein n is greater than or equal to 2, all the A(s) are the same or different, all the B(s) are the same or different, all the C(s) are the same or different, and all the X(s) are the same or different; in the layer structure, each A layer independently comprises the propylene polymers which are the same or different, each C layer independently comprises the propylene polymers which are the same or different, each B layer independently comprises the ethylene polymers which are the same or different, the X(s) are binder layers, and the A layers and the C layers are uniaxially stretched or biaxially stretched separately and independently. The invention further provides a preparation method and application of the multilayer composite membrane, and products containing the multilayer composite membrane. The multilayer propylene polymer and ethylene polymer composite membrane, disclosed by the invention, has the properties of high stiffness, high transparency, low temperature resistance, high tear strength and the like.

Description

technical field [0001] The invention relates to a propylene polymer-ethylene 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 foll...

Claims

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Application Information

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IPC IPC(8): B32B27/32B32B27/06B32B7/10B32B33/00B32B37/12B32B37/10B32B38/16B29C47/06
CPCB29C48/18B32B7/10B32B27/08B32B27/32B32B33/00B32B37/10B32B37/1284B32B38/164B32B2307/50B32B2307/54B32B2307/5825
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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