The light vehicle market has a very large demand for re […]
The light vehicle market has a very large demand for resins such as nylon, poly-bingene, polyurethane and other engineering plastics, accounting for more than 30% of the total resin market demand; the demand for polyvinyl butyral accounts for about More than eighty-five percent of its total demand. So, what are the advantages of using plastics 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. The specific gravity of general plastics is 0.9~1.5, and the specific gravity of fiber-reinforced composite materials does 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 molding 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, plastic instrument panels and steering wheels are used in modern cars to enhance the cushioning effect.
The front and rear bumpers and the body trim are made of plastic materials to reduce the impact of objects outside the car on the sound of the car. In addition, plastic also has the function of absorbing and attenuating 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 well done, 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 coverings, they are very suitable for use in areas with greater pollution.
Fifth, plastics can be made into plastics with required properties by adding different fillers, plasticizers and hardeners according to the composition of the plastics, and modify the mechanical strength and processing and molding properties of the plastics to adapt to the uses of different parts on the car Claim.