Abstract: A series of PVB film was prepared via solution casting with hot plate drying. The effects of drying temperature, initial casting layer thickness, solution concentration, and content of filled conductive particle on the drying rate were investigated. It indicated that all the four factors had significant effect on the drying rate of the casting film, in which a higher drying temperature, a thinner initial casting layer as well as lower solution concentrations was beneficial to the improvement of drying rate, while the adding of filler particles reduced the solvent's relative content, which was not conducive to the improvement of the drying rate.

Key words: polyvinyl butyral, casting, drying rate