Injection molding materials commonly used in injection molding and plastic materials suitable for injection molding, including PE PP PS, are thermoplastic and suitable for hot injection molding.

PE material: PE is also called polyethylene. It is one of the most commonly used polymer materials in daily life. It is widely used in the manufacture of plastic bags, plastic films and milk barrels.

PP material: Polypropylene, polypropylene has high crystallinity and regular structure, so it has excellent mechanical properties. The mechanical properties of polypropylene are higher than that of polyethylene, but it is still a low grade in plastic materials, and its tensile strength can only reach 30 MPa or slightly higher. Polypropylene with a higher isotactic index has higher tensile strength, but as the isotactic index increases, the impact strength of the material decreases, but does not change after a certain value.

PS material: PS is polystyrene.