Improving the heat resistance of rubber compounds and the efficiency of rubber extruders, increasingly stringent automotive emission standards, forcing car manufacturers to take new measures to increase fuel combustion rates. Working at higher temperatures is an important task to improve the heat resistance of rubber compounds. For this reason, many seals use high temperature resistant fluoro rubber; the rubber material used in automobile radiator hoses has been changed from the current sulfur vulcanized EPDM 125 ° C to peroxide vulcanized EPDM 150 ° C, and then silicone rubber or AEM (175 ℃ level); The use of HNBR / Aramid cords in automotive timing belts is a development trend. Rubber products also contribute to the protection of the atmospheric ozone layer. At present, the refrigerant Freon will be replaced by a new refrigerant R-134a (tetrafluoroethane), so the rubber material for the production of air-conditioning hoses and seals needs to be improved: For air-conditioning hoses, R-134a is currently preferred. Low-intensity polyamide is used as the inner layer (CIIR or BIIR can also be used), polyamide is used as the interlayer, and the outer layer is heat-resistant and ozone-resistant EPDM, CR, EVM or HNBR; for the seals of new air-conditioning systems, HNBR is better. 2. Purification of the processing environment ① Flue gas During the rubber processing, many processes generate smoke, especially the smoke generated during rubber mixing and vulcanization, which is the main channel for polluting the environment during rubber processing. A simple and feasible way to eliminate the vulcanized flue gas is to set a vent hood on the vulcanized post, and make the product cooled as soon as possible after the mold is opened. A rubber vulcanized flue gas catalytic incineration device can also be used. After treatment, the total purification rate is 95%. In addition, the lead-containing vulcanization process of the hose will lead to lead-containing fumes, which should be abolished as soon as possible. The salt bath vulcanization of the sealing strip can use the new "green" liquid vulcanizing medium to replace the current nitrite vulcanizing medium. ② Dust Many rubber compounding agents are micropowder-like substances, which easily cause "pneumoconiosis". In recent years, the rubber industry has achieved good results in reducing dust pollution, especially the commissioning of the new process carbon black production line and the expansion of the mixer / up / down auxiliary machine / automatic batching line, which have made great contributions to environmental protection. . ③ Solvents Many workers in rubber factories are exposed to solvents, including gasoline, benzene, toluene, xylene, ethyl acetate, and chlorobenzene (some brands of adhesives). Measures to prevent solvent poisoning: use non-toxic or low-toxic solvents or solvent-free adhesives, such as "triphenyl-free" adhesives, hot-melt adhesives, water-based adhesives, etc .; set up an exhaust system at the workplace, can The benzene-containing air is sent to the combustion furnace through the exhaust system, and the combustion is performed at a temperature of 800 ° C. The benzene is oxidized into harmless C02 and H20, and then discharged to the atmosphere after cooling; the type of organic solvents is single and the solvent content in air For higher operating points (such as electrostatic spraying and gluing), solvents can be recovered by activated carbon adsorption and regeneration. ④ Noise Mechanical noise, dynamic noise and electromagnetic noise generated during rubber processing will affect the health of workers.