It is still a long way to go in the future
It is still a long way to go in the future
Due to the late start of plastics in automobile engineering in China, the special resin license plate number of the car is low, the production technology is backward, and it is mainly imported. The corrosion resistance, high strength, low density, easy molding and energy saving and emission reduction, environmental safety and so on, make "plastic substitute steel" become the development trend of auto parts. Based on the above characteristics, China still has a long way to go in engineering material improvement and processing technology.
The development of automobile plastics in China can be divided into three stages, the first stage from the 1960s to the late 1970s. This stage mainly USES thermosetting resin to make electrical insulation parts and steering wheel and other parts, the purpose is to meet the production needs of the mid-tonnage truck. The second phase began in the late 1970s, which features the introduction of plastic manufacturing, automobile seat, instrument panel, ceiling, etc., and the production of PVC leather. The third stage is from the early 1990s. In this stage, with the development of the localization process of automobile materials, the research of automobile plastics has begun to integrate into the trend of world development.
According to the statistics of relevant materials, according to the dosage, the varieties of plastics in China's automobile are arranged, which in turn are PP, PVC, PU, unsaturated polyester, ABS, PF, PE, PA and composite materials. It can be seen that the use of the five generic engineering plastics is very small, so the use of engineering plastics and high performance engineering plastics still has a lot to be used in the domestic automobile. In recent years, relevant research institutes have been devoted to the research of the modification of high performance engineering plastics and materials processing technology, and made some progress.
China TieErYuan in geological exploration in geotechnical company in polyphosphoric acid amine flame retardant system (APP)/nylon (PA) 6 joined the association effect, improve the flame retardant effect of ABS, the flame retardant level can achieve UL94V - level 0, significantly improve the flame retardant properties of ABS/APP/PA6 system. The addition of additives also increases the high temperature residual carbon and thermal stability of the flame retardant system.
Tianjin city institute of urban construction has developed a variety of PS composite materials with different GB content. After the surface treatment of GB and PS, the compatibility of the two is significantly improved. It was found that the bending strength, tensile strength and impact strength of the composite material reached the maximum when GB's mass fraction was 5%. The Beijing chemical research institute of China has built a production line of 4kt/a, MPPO (modified polyphenyl ether) and developed PPS/PA66 and PPS/PPO materials.
At home, auto plastic parts have also been applied. For example, the jinan Steyr heavy-duty vehicle Shared plastic 47.5kg in each vehicle, with PVC as the main and PU second. The dashboard of the car is made of metal material, which is filled with PU semi-hard foam and PVC/ABS sheet metal. Fender is a PU microporous elastomer material used in RIM process manufacturing. The molding process of the interior panel of the cab is the HIPS vacuum suction method, which has made the front wall, side coaming, floor mat and engine cover.
