Coated rubber o-ring is a special rubber O-ring, which is made of rubber o-ring as inner core, plastic tube or film as outer layer and compounded by special process.Can be applied to ordinary rubber o-ring cannot adapt to some of the special working environment, such as chemical medium elasticity generated by the rubber filling, and resistance to chemical media characteristics by seamless plastic cladding layer, the product of both the rubber o-ring have flexibility, low compression permanent deformation performance, but also has special heat-resistant plastic, cold resistant, oil resistant, wear resistant, weather resistant, chemical medium corrosion resistance and other properties of ageing, can be applied to all kinds of dynamic and static sealing occasions, instead of part of the traditional rubber o-ring.

Because the product structure and manufacturing process of coated rubber O-ring are more complex, the price is higher than that of general rubber O-ring, so it is generally chosen to use under special working conditions.Coated rubber o-ring manufacturing technology abroad has more than 40 years of history, at first is a mechanical cutting method to polytetrafluoroethylene (PTFE) film coated on the rubber o-ring, in order to adapt to the needs of the working conditions of use, sometimes coated layer and cladding layer, sometimes as much as possible, the purpose is to reduce the sealing medium leakage on the rubber ring,Because this product has certain drawbacks, and developed a fluorinated ethylene propylene (FEP) and tetrafluoroethylene and perfluorinated alkyl vinyl ether copolymer (PFA) tube coated rubber o-ring, all this is the current application of the structure and most varieties at home and abroad, covering the material of rubber o-ring, fluorine rubber, silicone rubber, ethylene-propylene rubber, neoprene and so on.