With the development of aerospace, automotive parts and medical devices, the requirements for precision and dimensional stability of rubber products in harsh environment are becoming higher and higher.For example, the radiator coolant hose of heavy truck needs to withstand high temperature and high pressure, and the diameter of the hose is generally large, most of which are made of silicone composite hose.

The rubber hose is used in the automobile is the variety, the material kind many compound structure rubber products, the rubber layer main body material mainly is NBR, NR, EPDM and so on, generally judges the high pressure rubber hose assembly connection quality the main index is: the assembly's tensile strength, in the high pressure rubber hose deduction place failure proportion is biggest.