Kevlar which is dipped with PTFE emulsion then treated with lubricant and inhibitor of corrosion, finally braided to form square cross-section. Because Kevlar yarns have excellent properties with very high strength and module(it is called artifical wire). So compared with other kinds of braided packings as well as combined with others to from packing sets of different charateristics to be used as end rings.

This kind of packing is mainly used as substitude of asbestos in pump system. Not only it protects enviroment but also its property is better than asbestos. Even if under bad conditions where ordinry asbestos packings can do. In addtion, its working life is very long, sealing effect more better and it is often used at bad conditions, such as water pumps at mortar site, tin mine, pump factory and power plant.