Plastic Injection Molding Machines: Driving Innovation in Plastics Manufacturing Plastic injection molding machines are highly versatile when it comes to material selection. A wide variety of thermoplastics and thermosetting plastics can be used in the process, each offering different properties such as strength, flexibility, heat resistance, or chemical resistance. Some of the most commonly used materials include polyethylene, polypropylene, polystyrene, and ABS, but...