Air conditioning hose

With the application of new environmentally friendly refrigerant R134a, structure and materials changed a lot of air conditioning hose, plastic resin and chlorinated butyl rubber and EPDM rubber structure becomes the best combination of air conditioner hose. HFC-134a instead of CFC-12 for automotive air conditioning system refrigerant. Japanese -134a ability reduction, nylon and water permeability of the lower compound NBR/CR and high acrylonitrile rubber in rubber tubes are replaced by IIR.