LAUSR

Bovine and fish gelatin films were prepared by thermo-compression molding technique. This study investigated the effects of glycerol levels (15-35%) and resin pre-heating conditions including pre-heating temperatures (120, 140 and 160°C) and times (5 and 10 min) on film properties. Tensile strength (TS), elastic modulus (EM) and yellowness of films decreased, but elongation at break (EAB), water-vapor permeability (WVP) and transparency increased with increasing glycerol level. The gelatin films generally had decreased TS, EM, WVP and transparency, but increased yellowness as the pre-heating temperature and time increased. Therefore, the glycerol level and condition used for resin pre-heating directly influenced the film properties.