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what are the advantages of using plastics for automotive materials?

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what are the advantages of using plastics for automotive materials?
Click number:- Release time:2019-06-19

Automotive light weighting is a major development trend in today's international automotive industry. The current automotive market demand has shifted to the lighter-weight sport utility vehicles, minivans and other light vehicles, which will drive the development of automotive materials to a lighter weight.

In the light vehicle market, the demand for resins such as nylon, polypropylene, polyurethane and other engineering plastics is very large, accounting for more than 30% of the total resin market demand; the demand for polyvinyl butyral is about more than 85% of the total demand. .

So, what are the advantages of using plastics for automotive materials?

what are the advantages of using plastics for automotive materials 1

Firstly, the biggest advantage of automotive materials in plastics is to reduce the weight of the car body. Light weight is the goal pursued by the automotive industry, and plastics can make a big difference in this regard. Generally, the specific gravity of plastic is 0.9~1.5, and the specific gravity of fiber reinforced composite material will not exceed 2, while in metal materials, the specific gravity of A3 steel is 7.6, brass is 8.4, and that of aluminum is 2.7. This makes plastic the preferred material for lightweight vehicles.

Secondly, the plastic injection molding is easy, making it easy to produce parts with complex structure. For example, the instrument panel is processed with a steel plate, and it is often necessary to first process and shape each component, and then separately assemble or weld with a connecting member, there are a lot of step numbers. The use of plastic can be molded at one time, the processing time is short, and the precision is guaranteed.

Thirdly, the elastic deformation characteristics of plastic products absorb a large amount of collision energy, which has a large buffering effect on strong impact and protects vehicles and passengers. Therefore, to use plasticized dashboards modernized vehicles and steering wheels to enhance cushioning.

The front and rear bumpers and body trim strips are made of plastic material to reduce the impact of objects outside the vehicle on the body of the car. In addition, the plastic also absorbs and attenuates vibration and noise, which improves ride comfort.

Fourthly, the plastic is highly resistant to corrosion and will not corrode if it is partially damaged. However, steel production is easy to rust and corrosion once the paint surface is damaged or the pre-corrosion is not good. It will easily rust and corrode. Plastics have higher corrosion resistance to acids, alkalis, and salts than steel plates. If plastic is used as the body cover, it is very suitable for the high pollution areas use.

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Fifthly, plastics can be made according to the tissue composition of plastics by adding different fillers, plasticizers and hardeners. The plastics, the mechanical strength and processing properties of the modified plastics, to meet the application requirements of different parts of the car.

For example, bumpers should have considerable mechanical strength, while cushions and backrests should be made of soft polyurethane foam. It is more convenient that the plastic color can jump out of different colors through the additive, eliminating the trouble of painting. Some plastic parts can also be plated. For example, abs plastic has good plating performance and can be used to make decorative strips, signs, switch knobs, wheel trim covers, etc,. 

High-performance plastics are gaining more and more applications in automobiles. The use of plastics helps to reduce the weight of the car. For every 10% reduction in vehicle weight, fuel economy can be increased by 5%. Automakers can adapt plastics to replace traditional steel materials and reduce costs. Plastics increase the flexibility of car manufacturers' designs. The successful application of plastics in automobiles has reduced the cost of the car. A simple injection molded plastic part can function as many metal parts welded together. The plastic can be molded into a more complex shape than the steel assembly, which can be reduced. The number of parts used in the integration process.

Injection molded plastic parts are also aesthetically pleasing, and are difficult to achieve using conventional materials such as the steel and glass, such as glass headlamp lenses replaced with polycarbonate. Environmental power is driving automakers to use plastic-based automotive glazes. Fuel consumption and carbon dioxide emissions are key factors in the evaluation of many automakers.

Application development information indicates that the environmental benefits of replacing polycarbonate with polycarbonate (PC) include weight, safety, and design. One kilogram of PC glaze can replace 2.2 kilograms of glass, saving 1 to 200 megajoules and reducing 14 to 22 kilograms of carbon dioxide emissions for a life of 150,000 kilometers (based on average US car consumption).

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