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
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[0052] A preparation method of a five-layer co-extruded solar cell back sheet containing PP specifically includes the following steps:
[0053] (1) Use a high-speed mixer to mechanically mix polyvinylidene fluoride, nano-fillers, flow modifiers, reinforcing resins, inorganic fillers and heat stabilizers at room temperature for 5-10 minutes, then use a twin-screw extruder for melt extrusion Granulation, extrusion temperature 200-230℃, screw speed 200-350rpm, to obtain modified polyvinylidene fluoride pellets, which are used as outer weathering layer;
[0054] (2) Use a high-speed mixer to mechanically mix the polypropylene, coupling agent and antioxidant at room temperature for 5-10 minutes, then use a twin-screw extruder for melt extrusion granulation at an extrusion temperature of 200-230°C, The screw speed is 200-350rpm to obtain modified polypropylene pellets, which are used as structural reinforcement layer;
[0055] (3) When the inner weathering layer is a modified polyvinylide...
Example Embodiment
[0060] Example 1
[0061] A five-layer co-extruded solar cell back sheet containing PP, the specific preparation process is as follows:
[0062] (1) Use a high-speed mixer to mix 75 parts by weight 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 2 , 1 part of DBTM and 0.5 part of calcium stearate are mechanically mixed at room temperature for 5-10 minutes, then use twin-screw extruder for melt extrusion, the extrusion temperature is 200-230℃, the screw speed is 200-350rpm, and the extrusion Modified polyvinylidene fluoride pellets are prepared after granulation;
[0063] (2) Use a high-speed mixer to mechanically mix 94 parts by weight of polypropylene, 5 parts of KH570 and 1 part of antioxidant 1010 at room temperature for 5-10 minutes, then use a twin-screw extruder for melt extrusion. Extrusion temperature is 200-230℃, screw speed is 200-350rpm, after extruding, pelletizing...
Example Embodiment
[0065] Example 2
[0066] A five-layer co-extruded solar cell back sheet containing PP, the specific preparation process is as follows:
[0067] (1) Use a high-speed mixer to mix 75 parts by weight 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 2 , 1 part of DBTM and 0.5 part of calcium stearate are mechanically mixed at room temperature for 5-10 minutes, then use twin screw extruder for melt extrusion, extrusion temperature 200-230℃, screw speed 200-350rpm, extrusion Modified polyvinylidene fluoride pellets are prepared after granulation;
[0068] (2) Use a high-speed mixer to mix 94 parts by weight of polypropylene, 5 parts of KH570, and 1 part of antioxidant 1010 at room temperature for 5-10 minutes, then use a twin-screw extruder for melt extrusion. The output temperature is 200-230℃, the screw speed is 200-350rpm, and the modified polypropylene pellets are obtained by pe...
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