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Polyvinylidene fluoride composite membrane and method for preparing same

A polyvinylidene fluoride and composite film technology, applied in the field of composite materials, can solve the problems of low surface energy and difficult bonding of films, and achieve the effects of reducing difficulty, novel and unique preparation methods, and high cost advantages.

Inactive Publication Date: 2017-09-26
SHANGHAI HIUV NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, PVDF has a very low surface energy. This low surface and its own extremely strong C-F bond make it difficult for PVDF films to bond with traditional PET substrates.

Method used

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  • Polyvinylidene fluoride composite membrane and method for preparing same
  • Polyvinylidene fluoride composite membrane and method for preparing same
  • Polyvinylidene fluoride composite membrane and method for preparing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Among the raw materials used in the three-layer co-extruded cast film, PVDF is modified, and the mass-number ratio of the modified PVDF raw material is 90 parts of PVDF, 10 parts of PMMA, 0.5 part of antioxidant, and 0.7 part of ultraviolet absorber. The modified PVDF pellets, EMA pellets and LDPE pellets were placed in their respective single-screw extrusion stages, and re-cast in three layers of die heads to form a film. By adjusting the extrusion volume, the thickness of the outer layer was 5 μm, and the thickness of the middle layer was The layer is 5 μm and the inner layer is 5 μm in thickness. The temperature settings in each zone of the three single-screw extruders are as follows:

[0028] temperature(°C)

Embodiment 2

[0030] Among the raw materials used in the three-layer co-extruded cast film, PVDF is modified, and the mass-number ratio of the modified PVDF raw material is 90 parts of PVDF, 10 parts of MBS, 0.3 part of antioxidant, and 0.5 part of ultraviolet absorber. The modified PVDF pellets, EMA pellets and LDPE pellets were placed in their respective single-screw extrusion stages, and re-cast in three layers of die heads to form a film. By adjusting the extrusion volume, the thickness of the outer layer was 5 μm, and the thickness of the middle layer was The layer is 10 μm and the inner layer is 15 μm in thickness. The temperature settings in each zone of the three single-screw extruders are as follows:

[0031]

[0032]

Embodiment 3

[0034] Among the raw materials used in the three-layer co-extruded cast film, PVDF is modified, and the mass fraction ratio of the modified PVDF raw material is 90 parts of PVDF, 10 parts of acrylate toughening agent, 0.6 part of antioxidant, and ultraviolet absorber 0.9 servings. The modified PVDF pellets, EMA pellets, and LDPE pellets were put into their respective single-screw extrusion stages, and re-cast in three layers of die heads to form a film. By adjusting the extrusion volume, the thickness of the outer layer was 8 μm, and the thickness of the middle layer was The layer is 8 μm, the inner layer is 20 μm in thickness. The temperature settings in each zone of the three single-screw extruders are as follows:

[0035] temperature(°C)

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Abstract

The invention relates to a polyvinylidene fluoride composite film and a preparation method thereof, wherein the polyvinylidene fluoride composite film comprises: an outer PVDF layer, a middle layer and an inner polyolefin layer, wherein the middle layer is acrylic acid Copolymer layer or olefinic copolymer layer, wherein said acrylic acid copolymer comprises ethylene-acrylate EMA, ethylene-acrylic acid EAA, ethylene-ethyl acrylate EEA, ethylene-methacrylic acid copolymer EMAA and ethylene-methyl acrylate One or more of the copolymer EMAC; the olefinic copolymer layer is one or more of the graft-modified ethylene-vinyl acetate EVA and the graft-modified polyolefin elastomer POE. The polyvinylidene fluoride composite film and its preparation method in this invention are adopted, and the solar battery back plate prepared adopts the modified PVDF composite film, which has good bonding performance and good aging resistance effect, greatly reduces the production cost of the fluorine film, and The preparation method is simple and practical, and reduces the difficulty of compounding it with other substrates.

Description

technical field [0001] The invention relates to the field of composite materials, in particular to a fluorine film for a solar battery back plate and a preparation method thereof, in particular to a polyvinylidene fluoride composite film and a preparation method thereof. Background technique [0002] With the gradual reduction of non-renewable resources, finding and developing new energy sources has become a key issue of concern. As a new type of green energy, solar energy has no pollution to the environment, and has a wide range of sources. It is an inexhaustible renewable energy source. At present, the utilization of solar energy resources is mainly converted by solar silicon cells. The service life of commercial solar cell components is 25 years. In order to ensure such a long service life of silicon cells, the backplane under the solar cell components needs to have better Aging resistance, the fluorine film on the back plate is currently the most widely used protective ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/08B32B27/18B29D7/01
CPCB32B27/08B29D7/01B32B27/18B32B2250/03B32B2307/552B32B2307/712B32B2457/10
Inventor 李民周俊
Owner SHANGHAI HIUV NEW MATERIALS
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