Abstract
For the design of solid-conveying section of plastics machinery it is necessary to know the characteristics of powdery and granular solid plastics. In this study, compression characteristics, internal and external friction of some kinds of solid plastics are measured. The compression characteristics are found to vary extremely with temperature. The angle of internal friction is obtained from Coulomb's law. It is also found that the coefficient of external friction between metal surface and solid plastics is fairly influenced both by pressure and by flatness of metal surface.
