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Modified polyvinylidene fluoride material used for solar cell protective films and preparation method thereof

A technology of polyvinylidene fluoride and solar cells, which can be used in circuits, photovoltaic power generation, electrical components, etc., can solve problems such as hindering domestic fluoroplastic films, and achieve the effects of improving processing plasticity, mitigating impact damage, and good value for money

Active Publication Date: 2013-11-13
SUZHOU HECHANG POLYMERIC MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the adhesion of the fluoroplastic film in the back film of the solar cell module to other films or components is a technical difficulty, which hinders the application of the domestic fluoroplastic film to the back film of the solar cell, and the current fluoroplastic film still relies on imports
However, since it needs to be bonded with polymer materials such as E / VAC and PET when it is applied to the back film of solar cells, how to improve the bonding strength is a current technical problem.

Method used

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  • Modified polyvinylidene fluoride material used for solar cell protective films and preparation method thereof

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[0019] The invention provides a modified polyvinylidene fluoride material used for solar cell protective films and a preparation method thereof. By modifying PVDF, the PVDF material is blended with HDPE and POE to improve the surface free energy of the PVDF film. Improve its bonding strength with E / VAC, PET substrates.

[0020] Modified polyvinylidene fluoride material for solar cell protective film, the composition weight ratio is: polyvinylidene fluoride (PVDF) 55~70%, polyethylene (HDPE) 10~20%, polyethylene grafted maleic anhydride 3 ~6%, ethylene － Octene copolymer (POE) 10~20%, antioxidant 0.3~0.6%, lubricant 0.2~0.5%.

[0021] The preferred formula is: polyvinylidene fluoride 65%, polyethylene 14.3%, polyethylene grafted maleic anhydride 5%, ethylene-octene copolymer 15%, antioxidant 0.4%, lubricant 0.3%.

[0022] Among them, the melting point of polyvinylidene fluoride is 145°C, and the thermal decomposition temperature is above 320°C; the grade of polyethylene is po...

Embodiment 1

[0028] First, add 65 parts of polyvinylidene fluoride, 14.3 parts of polyethylene, 5 parts of polyethylene grafted maleic anhydride, 15 parts of ethylene-octene copolymer, 0.4 parts of antioxidant, and 0.3 parts of ethylene bis stearamide into the high-speed Mix it evenly in the mixing barrel; then, add the twin-screw extruder for mixing, and the temperature of each section of the twin-screw is respectively: T 1 =150℃, T 2 =170°C, T 3 =170°C, T 4 =180°C, T 5 =190°C, T 6 =200℃, twin-screw extruder speed r=350r.min -1 , and finally, extrude, cool, and pelletize to obtain the modified polyvinylidene fluoride material used for the protective film of solar cells.

Embodiment 2

[0030] First, add 55 parts of polyvinylidene fluoride, 19.9 parts of polyethylene, 4 parts of polyethylene grafted maleic anhydride, 20 parts of ethylene-octene copolymer, 0.6 parts of antioxidant, and 0.5 parts of ethylene bisstearamide into the high-speed Mix it evenly in the mixing barrel; then, add the twin-screw extruder for mixing, and the temperature of each section of the twin-screw is respectively: T 1 =150℃, T 2 =160°C, T 3 =170°C, T 4 =180°C, T 5 =190°C, T 6 =200℃, twin-screw extruder speed r=340r.min -1 , and finally, extrude, cool, and pelletize to obtain the modified polyvinylidene fluoride material used for the protective film of solar cells.

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Abstract

The invention provides a modified polyvinylidene fluoride (PVDF) material used for solar cell protective films and a preparation method thereof. The material comprises: 55-70% of PVDF, 10-20% of high density polyethylene (HDPE), 3-6% of polyethylene grafted maleic anhydride, 10-20% of an ethane-octylene copolymer, 0.3-0.6% of an anti-oxidant, and 0.2-0.5% of a lubricant. The preparation process consists of: first adding each component material into a high speed mixing bucket according to the ratio for uniform mixing; adding the obtained mixture into a double-screw extruder for mixing; controlling the extrusion temperature of the first and second segment of the double-screw extruder composed of six segments at 150-170DEG C, and controlling the extrusion temperature of the other segments at 170-200DEG C; leaving the reactant to stay in the double-screw extruder for 3-6min totally, and keeping the rotating speed of the double-screw extruder at 300-350r.min<-1>; conducting cooling and pelletizing to the obtained material after extrusion, thus obtaining the modified polyvinylidene fluoride material used for solar cell protective films. The adding of HDPE into PVDF for modification can obviously reduce the crystallization degree of PVDF, and enhance the processibility of PVDF.

Description

technical field [0001] The invention relates to a polyvinylidene fluoride material, in particular to a modified polyvinylidene fluoride material used for a protective film of a solar cell and a manufacturing method thereof. Background technique [0002] A solar cell is a solar power generation device that directly converts sunlight energy into DC power, and is a clean energy source with economic benefits, environmental benefits and sustainable development. The solar cell module is composed of a high conversion efficiency monolithic solar conversion silicon wafer, ethylene-vinyl acetate copolymer film (E / VAC), low-iron tempered glass, and a back film made of fluorine plastic film and polyester film. composition. These elements are heated and laminated under vacuum to form a whole, and finally the anti-corrosion aluminum alloy frame and junction box are installed to become the finished solar cell module. [0003] At present, the adhesion of the fluoroplastic film in the back...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L27/08C08L23/06C08L51/06C08L23/08B29C47/92B29B9/06H01L31/048B29C48/92
CPCY02E10/50B29C48/022B29C48/04B29C48/40B29C48/875B29C48/92B29C2948/9259B29C2948/92704B29C2948/92885B29C2948/92895
Inventor 汪倩文赵东明
Owner SUZHOU HECHANG POLYMERIC MATERIALS
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