A wide range of materials can be used for injection moulding, including:
Thermoplastics: these are the most commonly used materials for injection moulding because they can be melted and solidified multiple times without degrading. Examples include polyethylene, polypropylene, polystyrene, and PVC.
Thermosetting plastics: these materials cannot be melted and solidified multiple times without degrading, but they offer better heat resistance and dimensional stability than thermoplastics. Examples include phenolic resins, melamine formaldehyde, and epoxy resins.
Elastomers: these materials are used to create flexible parts that can stretch and return to their original shape. Examples include natural rubber, silicone, and neoprene.
Metals: some metals, such as zinc and aluminum, can be injection molded at high temperatures to produce parts with complex shapes.
Ceramics: some ceramics can also be injection molded to create parts with high precision and complex geometries.
The choice of material depends on the specific requirements of the application, such as strength, durability, heat resistance, and cost.