Nowadays the car bumper is mostly made by plastic injection molding technology. It requires a bumper mould which is made of steel material.
The material of the car bumper is mainly polypropylene (PP), specifically PP+EPDM+T20, with a shrinkage rate of 0.95%. PP, which is the Chinese name for polypropylene, is the main material of the bumper. EPDM, which is the Chinese name for ethylene propylene diene monomer rubber, can improve the elasticity of the bumper cover, and T20 refers to the addition of 20% talcum powder to the material, which can improve the rigidity of the bumper cover.
As a safety device that absorbs and mitigates external impact and protects the front and rear parts of the car body, the selection of its material is crucial to improving vehicle safety and economy. With the development of the automobile industry, the material of the bumper has gradually changed from traditional steel plates to lightweight plastic materials. At present, the front and rear bumpers of automobiles are generally injection molded with toughened (modified) polypropylene (PP) material as the raw material. This material has the characteristics of high melting point, heat resistance, low density, etc., and is the lightest among the current general plastics.
The bumper made of polypropylene (PP) material not only has high corrosion resistance, good strength and rigidity, but also has high rigidity, impact resistance, scratch resistance and applicability. Injection-molded bumpers will not break when subjected to collisions at a certain speed and have resilience, with similar performance to polyurethane, but at a 10% to 20% lower cost. The selection of this material not only optimizes collision safety, but also involves multiple factors such as reducing production costs, improving fuel economy, and meeting environmental protection requirements.
Pinheng Mould company is a professional bumper mould maker in China. We can meet the requirement both for OEM and after market demand.
