Development status of polypropylene special materials at home and abroad

1 PP automotive special materials

Auto parts are an important area for PP applications. PP has small density, abundant resources, easy molding and recycling, and along with the development of PP alloy and blending theory and technology, its performance/price ratio is continuously improved, the variety of modified PP is increasing sharply, and the mechanical properties and thermal performance can be adjusted. Large, high-toughness, heat-resistant, and high-rigidity modified PPs have been used in the automotive industry one after another. Therefore, PP has become the fastest-growing and most versatile automotive plastics. May 20, 1998 The Dutch company DSM and Mytex (a joint venture between Exxon and Mitsubishi of the United States) have signed a mutual licensing agreement. Both parties allow the other party to use their own technology to manufacture and sell automotive polypropylene in the United States and Europe. Ingredients show the trend of global integration of automotive plastics production plants: DSM is the main supplier of polypropylene for cars in Europe, especially thermoplastic polyolefins.

In order to make cars lighter, the tendency to replace other materials with more plastic is certain. Each car can replace 200-300kg of other materials with 100kg of plastic, because the components are reduced, the chassis, drive system and transmission system can be made lighter. After 2000, the amount of plastic in ordinary cars will increase to 14%. Foreign production companies also continue to introduce copolymer grade polypropylene resin. Recently, Stamlin P, a polypropylene copolymerized by Dutch company DSM, not only has excellent processability, but also has high impact, high hardness and UV aging resistance; Amoco Chemical Company The Ziegler-Natta catalyst was used to introduce the impact polypropylene copolymer Acctrf3950 with an MFR of 35g/10min. It is mainly used for automobile interior trims: the EltexP, a high-profile polypropylene introduced by Solvay, has high rigidity and heat resistance. Sex and better barrier properties are used in automotive interior trims. The highly crystalline polypropylene developed by Mitsui Oil & Chemicals Corporation can be used in car bumpers. Newly developed automotive resins include polypropylene thermoplastic elastomers such as Himont's integrated Hivalloy process and Catalloy process, elastomers obtained by grafting maleic anhydride onto the rubber phase in a reactor, and flexural modulus.

Real wax fabric is produced by using the wax-resist method and is usually printed on both sides of the fabric , there are usually some slight imperfections in the dye work and pieces will be unique.