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A three-layer structure coextruded solar cell back plate containing PBT and a preparation method thereof

A solar cell and three-layer structure technology, which is applied in the direction of circuits, photovoltaic power generation, electrical components, etc., can solve the problems of PETG materials such as poor weather resistance and environmental erosion resistance, layer and layer separation, etc., to reduce the backplane structure layer number, strong bonding, and excellent performance

Inactive Publication Date: 2019-01-04
杭州福禧新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The high price of fluorine-containing materials has always been an urgent problem for the solar cell backplane industry to solve
[0004] The patent number of Ningbo Longyang Technology Co., Ltd. is Z201110380482.4, which discloses a solar cell backplane and its preparation method. The backplane uses PETG as a weather-resistant layer, PET as a structural reinforcement layer, and EVOH as a barrier layer for multi-layer co-extrusion. There is no need to use adhesives, but the weather resistance and environmental erosion resistance of PETG materials are far inferior to those of fluorine-containing materials. At the same time, without adhesives between layers, it is easy to fall off between layers after long-term use separation phenomenon

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0049] A preparation method for a PBT-containing three-layer structure co-extruded solar battery back sheet, specifically comprising the steps of:

[0050] (1) Use a high-speed mixer to mechanically mix polyvinylidene fluoride, nano-scale fillers, flow modifiers, reinforcing resins, inorganic fillers and thermal stability additives at room temperature for 5-10 minutes, then use a twin-screw extruder to melt Extrusion granulation, the extrusion temperature is 200-230°C, the screw speed is 200-350rpm, and the modified polyvinylidene fluoride pellets are obtained;

[0051] (2) Use a high-speed mixer to mechanically mix polybutylene terephthalate, nano-titanium dioxide, toughener and antioxidant at room temperature for 5-10 minutes, then use a twin-screw extruder for melt extrusion Granulation, extrusion temperature 200-230°C, screw speed 200-350rpm, to obtain modified polybutylene terephthalate pellets;

[0052] (3) Add the modified polyvinylidene fluoride pellets, modified poly...

Embodiment 1

[0056] The acrylate-glycidyl methacrylate copolymer layer used in the examples is a glycidyl methacrylate-methyl methacrylate copolymer.

[0057] A kind of PBT-containing three-layer structure co-extruded solar battery back sheet, its specific preparation process is as follows:

[0058] (1) Using a high-speed mixer, 75 parts of polyvinylidene fluoride, 5 parts of nano-calcium carbonate, 3.5 parts of DOP, 4 parts of methacrylic resin, 6 parts of acrylic resin, 5 parts of TiO2, 1 part of DBTM, 0.5 parts of calcium stearate are mechanically mixed at room temperature for 5-10 minutes, then melt-extruded by a twin-screw extruder, the extrusion temperature is 200-230°C, the screw speed is 200-350rpm, and granulated after extrusion Modified polyvinylidene fluoride pellets;

[0059] (2) 50 parts by weight of polybutylene terephthalate, 20 parts of nano-titanium dioxide, 29 parts of methyl methacrylate-butadiene-styrene terpolymer and After 1 part of Antioxidant 1010 is mechanically ...

Embodiment 2

[0062] A kind of PBT-containing three-layer structure co-extruded solar battery back sheet, its specific preparation process is as follows:

[0063] (1) Use a high-speed mixer to mix 75 parts of polyvinylidene fluoride, 5 parts of nano-calcium carbonate, 3.5 parts of DOP, 4 parts of methacrylic resin, 6 parts of acrylic resin, and 5 parts of TiO in parts by weight. 2 , 1 part of DBTM and 0.5 part of calcium stearate are mixed mechanically at room temperature for 5-10 minutes, and then melted and extruded by a twin-screw extruder at a temperature of 200-230°C and a screw speed of 200-350rpm. Post-granulation to obtain modified polyvinylidene fluoride pellets;

[0064] (2) 50 parts by weight of polybutylene terephthalate, 20 parts of nano-titanium dioxide, 29 parts of methyl methacrylate-butadiene-styrene terpolymer and After 1 part of Antioxidant 1010 is mechanically mixed at room temperature for 5-10 minutes, it is melt-extruded with a twin-screw extruder at an extrusion temp...

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PUM

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Abstract

The invention discloses a three-layer structure coextruded solar cell back plate containing PBT and a preparation method thereof, belonging to the technical field of solar cell back plates. The back plate comprises a weather-proof layer, an adhesive layer, a structure reinforcing layer, and the weather-proof layer and the structure reinforcing layer are fixed together through the adhesive layer. The invention adopts a co-extrusion process to melt each layer of material into different flow channels and directly extrude and mold, the operation process is simple, and it is difficult to separate and fall off between the adhesive layers. As that preparation method of the invention can not only simplify the processing technology, but also has good weatherability, mechanical property and long-term stability; and meanwhile, no organic solvent is used in the preparation process, and the preparation method is environmentally friendly.

Description

technical field [0001] The invention belongs to the field of solar cell backboards, and in particular relates to a PBT-containing three-layer structure co-extruded solar cell backboard and a preparation method thereof. Background technique [0002] In recent years, due to global environmental problems and the depletion of fossil fuels, solar energy has attracted widespread attention as a clean, pollution-free and most abundant renewable energy source. Solar cells are efficient devices that convert solar energy directly into electricity. Solar cells are exposed to long-term outdoor wind, rain, ultraviolet rays and other natural factors. The solar cell backsheet should use a backsheet with excellent weather resistance and durability, which is convenient for protecting the solar cell and prolonging its service life. [0003] At present, the mainstream solar cell backsheet in the market has a five-layer structure, the outer layer is made of fluorine-containing materials with ex...

Claims

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Application Information

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IPC IPC(8): H01L31/049C08K3/22C08L67/02
CPCC08K3/22C08K2003/2241C08K2201/011H01L31/0481H01L31/049C08L67/02Y02E10/50
Inventor 顾方明赵黎李剑春
Owner 杭州福禧新材料有限公司
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