Injection Molding Process for Polypropylene An Overview of the Injection Molding Process for Polypropylene Polypropylene, commonly known as PP, is often referred to as the ‘hundred-fold adhesive’ due to its excellent impact resistance. PP is a semi-transparent, semi-crystalline thermoplastic with high strength, good insulation properties, low water absorption, a high heat deflection temperature, low density, … Read more