Fluorinated weather-resistant film for solar photovoltaic battery back plate and preparation method of fluorinated weather-resistant film

A photovoltaic cell and solar energy technology, applied in the field of solar photovoltaic power generation, can solve the problems of low longitudinal tear strength of the film, inconsistent film elasticity at both ends, high water vapor transmission rate, etc., and achieve excellent weather resistance, fast plasticization, heat Small shrinkage effect

Inactive Publication Date: 2012-05-02
常州荣晟新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The three-layer co-blowing process of PVDF is complicated, and the residence time of raw materials at high temperature is long. The degradation of raw materials causes a large number of black spots in the film, and the film has a large water vapor transmission rate.
There are also foreign companies that use the extrusion salivation method to prepare fluorine-containing weather-resistant films, such as SKC Company in South Kore

Method used

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  • Fluorinated weather-resistant film for solar photovoltaic battery back plate and preparation method of fluorinated weather-resistant film
  • Fluorinated weather-resistant film for solar photovoltaic battery back plate and preparation method of fluorinated weather-resistant film
  • Fluorinated weather-resistant film for solar photovoltaic battery back plate and preparation method of fluorinated weather-resistant film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] In embodiment 1, the fluorine-containing resin used is polyvinylidene fluoride (PVDF), and molecular weight is 690,000; The inorganic matter filler used is titanium dioxide, and average particle diameter is 0.2 micron; Used processing aid is Rohm and Haas Company The combination of methacrylate processing aids Paraloid K120 and Paraloid K400; the lubricant used is polyethylene wax; the anti-blocking agent used is erucamide; the flow modifier used is dioctyl terephthalate (DOP). The raw material formula of embodiment 1 is as follows:

[0028]

[0029] The fluorine-containing weather-resistant film in Example 1 was prepared according to the following steps:

[0030] (1) Use a high-speed mixer to uniformly mix the raw material formula to obtain a mixture. The stirring rate of the high-speed mixer is 400rpm.

[0031] (2) Then use a twin-screw extruder to transport, plasticize, blend and granulate the compound described in step (1) to obtain a granulated material. The...

Embodiment 2

[0034] In Example 2, the fluorine-containing resin used is a combination of polyvinylidene fluoride (PVDF) and vinylidene fluoride-hexafluoropropylene (PVDF-HFP) copolymer, the molecular weight of PVDF is 250,000, and the molecular weight of PVDF-HFP is 790,000; The inorganic filler used is calcium carbonate, and the average particle size is 0.1 micron; The processing aid used is the combination of the methacrylate processing aid Paraloid K175 and Paraloid K125 of Rohm and Haas; The lubricant used is chlorine The anti-blocking agent used is EBS; the flow modifier used is diisooctyl phthalate (DIOP). The raw material formula of embodiment 2 is as follows:

[0035]

[0036] The fluorine-containing weather-resistant film in Example 2 was prepared according to the following steps:

[0037] (1) Use a high-speed mixer to uniformly mix the raw material formula to obtain a mixture. The stirring rate of the high-speed mixer is 850rpm.

[0038] (2) Then use a twin-screw extruder t...

Embodiment 3

[0041] In embodiment 3, the fluororesin used is ethylene-chlorotrifluoroethylene copolymer (ECTFE), and ECTFE molecular weight is 250,000; The inorganic matter filler used is titanium dioxide, and average particle diameter is 0.2 micron; Used processing aid is The methacrylate processing aid Paraloid K400 of Rohm and Haas Company; The lubricant used is paraffin; The anti-blocking agent used is a silicone masterbatch, produced by Dow Chemical Company of the United States. The raw material formula of embodiment 3 is as follows:

[0042]

[0043] The fluorine-containing weather-resistant film in Example 3 was prepared according to the following steps:

[0044] (1) Use a high-speed mixer to uniformly mix the raw material formula to obtain a mixture. The speed of the high speed mixer was 1300 rpm.

[0045] (2) Then use a twin-screw extruder to transport, plasticize, blend and granulate the compound described in step (1) to obtain a granulated material. The aspect ratio of the...

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Abstract

The invention relates to a fluorinated weather-resistant film for a solar photovoltaic battery back plate and a preparation method of the fluorinated weather-resistant film, belonging to the technical field of solar photovoltaic generation. The fluorinated weather-resistant film is used on a packaged material back plate of a solar photovoltaic battery component so as to protect the battery component from being eroded by water vapor and preventing the oxidization of oxygen. The formula of the fluorinated weather-resistant film comprises the following materials in parts by weight: 61-78.8 parts of fluorinated resin, 5-20 parts of inorganic filler, 5-8 parts of processing aid, 0.1-0.5 parts of lubricant and 0.1-0.5 parts of antiblocking agent, and can further comprise 0-20 parts of flow modifier. In the invention, the fluorinated weather-resistant film for the solar photovoltaic battery back plate is prepared by adopting an extruding and film-blowing method. The prepared fluorinated weather-resistant film is flat, is easy to wind and rewind, has fewer black points, and simultaneously has obvious mechanical performance, especially high tearing strength and balanced longitudinal and horizontal performances. The film is not shrunk at the temperature of 120 DEG C. The transmissivity of water vapor of the single-layer film is low.

Description

technical field [0001] The invention relates to a weather-resistant film for a solar photovoltaic battery backplane and The preparation method belongs to the technical field of solar photovoltaic power generation. Background technique [0002] With the depletion of fossil energy, various renewable new energy industries are booming. It is expected that around the middle of this century, the proportion of fossil energy and renewable energy may be reversed, and solar energy may be the most eye-catching new energy variety. In a solar photovoltaic system, photovoltaic modules and batteries are the basis for power generation. Photovoltaic cell modules are assembled from various semiconductor element systems. In order to meet the long-term use requirements of solar cell systems for more than 25 years of outdoor use, solar packaging materials are increasingly concerned as key supporting materials. Wherein, the back sheet is located at the outermost layer on the back of the module,...

Claims

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Application Information

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IPC IPC(8): C08L27/16C08L27/12C08L23/08C08K3/22C08K3/26C08K3/30C08K5/20B29C55/28B29B9/06B29B7/00B29C71/04H01L31/048H01L31/049
CPCY02E10/50
Inventor 刘波田敬华郑榕凤
Owner 常州荣晟新材料科技有限公司
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