The Effects of Hydrolyzed Electrostatic Powder Coating Wastes on Fluidity and Density of Glass Fiber Reinforced Polypropylene

Abstract

In this study, synthetic wastes of different proportions have been used to improve the fluidity of glass fiber-reinforced polypropylene (GF/PP) during extrusion and plastic injection molding. The wastes used were mixed in GF/PP at the rate of 3%, 5% and 7% by weight and their flowability was determined by using melt flow device (MFI) under the effect of 10 kg weight at 230 °C. Depending on the type and ratio of waste used, the melt flow index of GF/PP is extracted and the effects of wastes on fluidity are explained by graphs. Also, changes in the densities of the formed mixtures were determined and shown in graphs. The effect of electrostatic powder paint materials in three different thermoset characters, which are used as synthetic wastes, has improved the fluidity of GF/PP by positively affecting under the same temperature and pressure. However natural additives have negatively affected the fluidity of GF/PP.

Keywords: polyvinyl chloride, powder coating waste, recycling, melt flow index, thermal properties.