The formulation and processing technology of nitrile, hydrogenated nitrile, fluororubber, acrylate rubber, polytetrafluoroethylene and other special rubber and plastic materials commonly used in rubber and plastic seals are studied, and improving the applicability and utilization of materials is still the focus of work. The application of nano materials will improve the mechanical properties and special functions of rubber and plastic materials. One of the first four national standards for nano materials issued by the National Standardization Committee on April 1 this year is the "nano zinc oxide" standard for rubber.
Some progress has been made in recent years, such as replacing low-performance oil-resistant rubber with special engineering elastomer, surface treatment of bright surface of rubber, modification of rubber plastic materials by nanotechnology and application of liquid rubber materials. In particular, the recent application of new materials has greatly promoted the rubber plastic sealing technology.
Thermoplastic elastomer (TPE), which is relatively weak in the application of seals in China, has the physical properties of vulcanized rubber and the processability of thermoplastic resin. The molding process does not need vulcanization, so it is regarded as the third generation rubber. TPO, TPV and TPU have been widely used in the world At present, it can be used in the production of TPO and EPV, and it can be used in the production of high-temperature TPO and EPV products in long-term. In TPO produced by dynamic vulcanization method. The rubber composition is as high as 60-70%. The wear resistance, ozone resistance, tear strength and compression deformation are higher than those of EPDM vulcanized rubber.
The United States, Western Europe and Asia are continuing to build TPO production facilities; TPU has excellent processing properties of plastics and physical properties of rubber, and its wear resistance, low temperature resistance and radiation resistance are excellent. It can be used in automobile, aerospace, medical and health care, daily necessities, military dream, etc Pu can be widely used in automotive damping pad, Bush, Bush, sleeve, airbag and other parts.
