Drying of Aqueous Polyvinyl Alcohol Solution Film with Glycerol

Abstract

A system of polyvinylalcohl (PVA), glycerol and water was examined as a multi-component solution model. Continuous or intermittent infrared drying was performed to obtain drying curves of thin layers of the solution system. Regardless of glycerol content, the drying rate curves for continuous drying with various glycerol contents arranged by PVA mass-basis mean moisture content coincided with drying rate of PVA solution over the whole range of the mean moisture content. Intermittent drying curves also coincided. These results will be useful for dryer design and operation.