Polytetrafluoroethylene has many excellent functions. Such as very low friction coefficient, non stick surface characteristics, wide use temperature range -180 ~ +260 ~ C, excellent aging resistance and chemical corrosion resistance. Polytetrafluoroethylene raw material belt is made of 100% Teflon as raw material. It has fine long fiber and a net shaped bulky structure. The PTFE uncooked tape has the characteristics of good toughness, high longitudinal strength and easy lateral deformation. It is the ideal material for the sealing of the coil and the thread. However, it can not be used in situations where contact with high concentration of oxygen or liquid oxygen is desirable. PTFE uncooked tape is mainly used for packing and thread sealing. A wide range of use, combined with strong oxidizing agent, strong acid, strong alkali, oxygen, gas, high temperature steam and a variety of chemical erosive medium pipe wire, valve interface seal. Polytetrafluoroethylene raw meal belt is a kind of auxiliary product commonly used in plumbing installation, it is used for connection of pipe fittings, and enhances the tightness of pipe connection.