The light vehicle market has a very large demand for resins such as nylon, polypropylene, polyurethane and other engineering plastics, accounting for more than 30% of the total resin market demand; the demand for polyvinyl butyral accounts for approximately More than eighty-five percent of the total demand. So, what are the advantages of using plastic as automotive materials?
First, the big advantage of using plastics as automotive materials is to reduce the weight of the car body. Lightweight is the goal pursued by the automotive industry, and plastics can show their power in this respect. Generally, the specific gravity of plastic is 0.9~1.5, and the specific gravity of fiber-reinforced composite material will not exceed 2. Among metal materials, the specific gravity of A3 steel is 7.6, brass is 8.4, and aluminum is 2.7. This makes plastic a material of choice for lightweight cars.
Second,plastic automobile moulding is easy, making it very convenient to process parts with complex shapes. For example, when the instrument panel is processed with steel plates, it is often necessary to first process and shape various parts, and then assemble or weld them with connectors, which requires many procedures. The use of plastic can be molded at one time, the processing time is short, and the accuracy is guaranteed.
Third, the elastic deformation characteristics of plastic products absorb a large amount of collision energy, have a greater buffering effect on strong impacts, and protect vehicles and passengers. Therefore, plasticized dashboards and steering wheels are used in modern cars to enhance the cushioning effect. The front and rear bumpers and body trim are made of plastic materials to reduce the impact of external objects on the sound of the car. In addition, plastic also has the function of absorbing and damping vibration and noise, which can improve the adaptability of riding.
Fourth, the plastic has strong corrosion resistance and will not corrode if damaged locally. However, once the paint surface is damaged or the anti-corrosion is not done well, the steel is prone to rust and corrosion. The corrosion resistance of plastics to acids, alkalis, and salts is greater than that of steel plates. If plastics are used as body covers, they are very suitable for use in areas with greater pollution. According to the composition of the plastics, the plastics of motorcycle parts injection molding parts can be prepared by adding different fillers, plasticizers and hardeners to produce plastics with required properties. The mechanical strength and processing and forming properties of the plastics are modified to suit the uses of different parts on the car.