What material is good for car bumpers?

Car bumpers are important parts that play a protective role in the appearance of vehicles. The choice of their materials is directly related to the safety performance and appearance of the vehicle. At present, the common car bumper materials on the market include plastic, aluminum alloy, carbon fiber, etc., and polypropylene plastic, as a new material, is gradually favored by car manufacturers. Polypropylene plastic has the advantages of high rigidity, impact resistance, scratch resistance and paintability. The bumper made of this material can not only withstand the impact of 8km/h without breaking, but also has the elasticity of recovery. The performance is equivalent to that of PU materials, but the cost is reduced by 10%~20%. Therefore, polypropylene plastic is currently a more ideal choice for car bumper materials.
However, car parking also requires attention to some details. First of all, it is forbidden to park in places with no parking signs, which means that within the limited range, all vehicles are prohibited from parking temporarily or for a long time. Secondly, parking is prohibited within the yellow grid lines. Yellow mesh lines usually appear at intersections, entrances and exits, etc., indicating that parking is prohibited in this area for any reason. The length of the yellow solid line indicates how large the prohibited parking area is, which generally appears at pedestrian crossings, intersections and other places. In addition, parking is also prohibited in bus stops, gas stations, first aid stations, fire hydrants and other areas. In short, complying with parking regulations is the obligation of every driver, which can not only ensure their own safety, but also maintain traffic order.