Raw material belt and polytetrafluoroethylene raw material belt usage: Expanded polytetrafluoroethylene raw material belt is mainly used for filling and thread sealing. 2. Characteristics: PTFE has many excellent properties. Such as non stick surface characteristics, extremely low friction coefficient, wide working temperature range -180 ° C~+260 ° C, excellent aging resistance and chemical corrosion resistance. Expanded polytetrafluoroethylene raw material tape is made of 100% polytetrafluoroethylene as raw material, with a network of expanded structures composed of microfibers and nodes. Expanded polytetrafluoroethylene raw material tape has the characteristics of good toughness, high longitudinal strength, and easy lateral deformation. It is very suitable for packaging and sealing on threads. But it cannot be used in situations where it comes into contact with high concentrations of oxygen or liquid oxygen