With the rapid development of China's economy, environmental pollution has become the most pressing issue. When Beijing successfully earned the title of "Fog City," energy conservation and environmental protection became a major topic in today's society. In order to improve air quality, the Chinese government decided to control pollution sources, and the treatment of automobile exhaust became an important part of environmental improvement. Therefore, the government issued documents requiring that National IV vehicles must be equipped with SCR system pipelines to purify automobile exhaust and contribute to environmental improvement.
ETFE is the strongest fluoroplastic, achieving a good balance of various mechanical properties—extremely high tear resistance, high tensile strength, medium hardness, excellent impact resistance, and long stretch life. ETFE is a good dielectric material, with high insulation strength, a dielectric constant of 2.6, high resistivity, and a low dissipation factor of only 0.003. Its low dielectric constant remains essentially constant under varying frequency and temperature conditions. The practical operating temperature range of ETFE is quite broad, with a constant temperature typically set between -65°C and +150°C. Even at ultra-low temperatures, it remains remarkably tough, with a brittle temperature as low as -100°C. Additionally, ETFE has passed several rigorous fire resistance tests, such as IEEE 383, and has achieved UL 94 V-0 rating. At the same time, it has stable chemical properties, strong resistance to chemical corrosion, and is resistant to strong acids, strong bases, strong oxidizers, and solvents.
