1 PP car special material
Auto parts are an important area of ​​PP applications. PP has low density, abundant resources, easy to form and recycle, and with the development of PP alloy and blending theory and technology, its performance/price ratio is continuously improved, the varieties of modified PP are proliferating, and the mechanical properties and thermal properties are adjustable. Large, high toughness, heat-resistant and high-rigidity modified PP are successively used in the automotive industry. Therefore, PP has become the most used and fastest-growing variety of automotive plastics. On May 20, 1998, DSM of the Netherlands and Mytex (a joint venture between Exxon and Mitsubishi of the United States) signed a mutual licensing agreement. Both parties allowed each other to use their own technology to produce and sell polypropylene for automobiles in the US and Europe. Ingredients indicate the global integration trend of automotive plastics manufacturing plants: DSM is the main supplier of automotive polypropylene for automobiles, especially thermoplastic polyolefins.
In order to make cars lightweight, the tendency to replace other materials with more plastics is certainly certain. Each car can replace 200-300kg of other materials with 100kg plastic. Because the parts are lightened, the chassis, drive system and transmission system can be made lighter. After 2000, the plastic consumption in ordinary cars will increase to 14%. Foreign manufacturers have also continuously introduced copolymer grade polypropylene vehicle resin. Recently, the Dutch DSM company copolymerized polypropylene StamylanP has not only excellent processing properties, but also high impact, high hardness and UV aging resistance; Amoco Chemical Company Using Ziegler-Natta catalyst, the impact polypropylene copolymer Acctrf3950 has an MFR of 35g/10min. It is mainly used in automotive interior parts: Solvay's high-grade polypropylene EltexP, which has high rigidity and heat resistance. Sexuality and better barrier properties for automotive interior trim. High-crystalline polypropylene developed by Mitsui Oil Chemical Co., Ltd. can be used in automotive bumpers. Newly developed automotive resins are also thermoplastic elastomers such as Himont's integrated Hivalloy process and Catalloy process, which are obtained by grafting maleic anhydride to the rubber phase in a reactor to bend the modulus of elasticity.
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