Material special for polyvinylidene fluoride film

Abstract

The invention discloses a material special for a polyvinylidene fluoride film. The material comprises the following components in part by weight: 60 to 75 parts of polyvinylidene fluoride, 5 to 10 parts of nanoscale filler, 0.5 to 3.5 parts of mobility modifier, and 10 to 20 parts of reinforced resin; and the material can further comprise 5 to 10 weight parts of inorganic filler and/or 0.1 to 2 weight parts of thermal stability auxiliary agent. The mobility of the polyvinylidene fluoride is greatly improved by the mobility modifier in the special material, so that melt extrusion and film forming can be easily performed; the reinforced resin has the functions of plasticization and toughening at the same time, so that the tear strength of the film is increased; under the strong shearing action of a double-screw extruder, the nanometer filler can be uniformly distributed, and the introduction of nanometer particles facilitates the reduction of the light transmittance and the water and vapor penetration rates of the film; the nanometer filler and the inorganic filler facilitate the improvement of the dimension stability of the film under the heated condition; and the polyvinylidene fluoride film prepared from the special material has the advantages of high mechanical strength, weather resistance and water and vapor barrier properties, low thermal shrinkage and the like.

Description

technical field [0001] The invention relates to a special material for polyvinylidene fluoride film, which is easy to process into a film and can be used to prepare a polyvinylidene fluoride film with excellent weather resistance, low water vapor transmission rate and excellent mechanical properties. Background technique [0002] Polyvinylidene fluoride (PVDF) is an important member of the fluoroplastic family, but due to poor fluidity, melting processing is difficult, and film formation is even more difficult. On the other hand, polyvinylidene fluoride has outstanding high and low temperature resistance, chemical corrosion resistance and weather resistance, excellent electrical insulation, and has been used in many industrial and civil fields. These excellent properties of polyvinylidene fluoride just meet the requirements of solar cell packaging backplane film protective film. One of the technical problems to be solved by the present invention is: research and development ...

AI Technical Summary

Problems solved by technology

However, THV and ECTFE have high raw material costs and are not suitable for large-scale promotion.

However, pure PVDF raw materials also have difficulties in film formation. After film formation, they are easy to warp and deform, and have high thermal shrinkage. Polyvinylidene fluoride film special material for solar cell backsheet with high durability, high weather resistance and low heat shrinkage

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