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A five-layer co-extruded solar cell back plate containing PP and a preparation method thereof

A technology for solar cells and back sheets, applied in chemical instruments and methods, circuits, photovoltaic power generation, etc., can solve the problems of poor weather resistance and environmental erosion resistance of PETG materials, layer and layer peeling and separation, and simplify the operation process. , The effect of strong bonding and low production cost

Inactive Publication Date: 2018-12-21
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

[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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preparation example Construction

[0052] A preparation method for a five-layer co-extruded solar battery back sheet containing PP, specifically comprising the steps of:

[0053] (1) Use a high-speed mixer to mechanically mix polyvinylidene fluoride, nano-scale fillers, flow modifiers, reinforcing resins, inorganic fillers and heat stabilizers at room temperature for 5-10 minutes, and then use a twin-screw extruder for melt extrusion Pelletizing, extrusion temperature 200-230°C, screw speed 200-350rpm, to obtain modified polyvinylidene fluoride pellets, which are used as the outer weather-resistant layer;

[0054] (2) Use a high-speed mixer to mechanically mix polypropylene, coupling agent and antioxidant at room temperature for 5-10 minutes, then use a twin-screw extruder to carry out melt extrusion granulation, and the extrusion temperature is 200-230°C. Screw speed 200-350rpm, obtain modified polypropylene pellets, used as structural reinforcement layer;

[0055] (3) When the inner weather-resistant layer i...

Embodiment 1

[0061] A five-layer co-extruded solar cell back sheet containing PP, the specific preparation process of which is as follows:

[0062] (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;

[0063] (2) Use a high-speed mixer to mechanically mix 94 parts of polypropylene, 5 parts of KH570 and 1 part of antioxidant 1010 at room temperature for 5-10 minutes by weight, and then use a twin-screw extruder for melt extrusion. The extrusion temperature is 200-230°C, the screw speed is 200-350rpm, and pelletized after extrusion t...

Embodiment 2

[0066] A five-layer co-extruded solar cell back sheet containing PP, the specific preparation process of which is as follows:

[0067] (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;

[0068] (2) Use a high-speed mixer to mechanically mix 94 parts of polypropylene, 5 parts of KH570 and 1 part of antioxidant 1010 at room temperature for 5-10 minutes by weight, and then use a twin-screw extruder for melt extrusion. The outlet temperature is 200-230°C, the screw speed is 200-350rpm, and pelletized after extrusion to obt...

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Abstract

The invention discloses a five-layer co-extruded solar cell back plate containing PP and a preparation method thereof, belonging to the technical field of solar cell back plate. The outer weathering layer and the structure reinforcing layer are fixed together by an outer adhesive layer, and the structure reinforcing layer and the inner weathering layer are fixed together by an inner adhesive layer. The outer weathering layer and the structure reinforcing layer are fixed together by an outer 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 the adhesive layers and the adhesive layers are not likely to fall off. As that preparation method of the invention can not only simplify the processing process, but also has good weatherability, mechanical property and long-term stability; meanwhile, no organic solvent is use in the preparation process, and the preparation method is environmentally friendly and green.

Description

technical field [0001] The invention belongs to the field of solar battery backboards, and in particular relates to a five-layer co-extruded solar battery backboard containing PP 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] Solar backsheets currently on the market generally have a five-layer structure: outer layer / outer adhesive layer / middle layer / inner adhesive layer / inner layer. ...

Claims

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Application Information

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IPC IPC(8): H01L31/048H01L31/049B32B27/30B32B27/32B32B27/08B32B7/12B32B33/00B29C47/06B29B9/06
CPCB29B9/06B32B7/12B32B27/08B32B27/304B32B27/32B32B33/00B32B2307/306B32B2307/552H01L31/0481H01L31/049Y02E10/50
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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