Effect of molding conditions in the properties of PP/PP sandwich injection molding

摘要

The basic charactristics of a sandwich injection molded product depend on the properties of the respective resins that the comprise the skin layer and the core layer, and the skin/core resin ratio. The charactristics of the core resin and the skin/core ratio in particular may vary depending on the injection molding conditions. This report considers the influences that the molding conditions (injection speed, cylinder temperature and mold temperature) confer on the core layer resin in the PP/PP combination and mechanical properties of the sandwich molded product. This study employed the such skin/core combinations as homopolymer PP/homppolymer PPand homopolymer PP/copolymer PP.