PTFE has outstanding excellent comprehensive properties, high temperature resistance, corrosion resistance, non-stick, self-lubricating, excellent dielectric properties and low friction coefficient. Used as engineering plastics, it can be made into Teflon tubes, rods, strips, plates, films, etc. Generally used in corrosion-resistant pipes, containers, pumps, valves, and radar, high-frequency communication equipment, radio equipment, radomes, etc. with high performance requirements. Adding any filler that can withstand the sintering temperature of polytetrafluoroethylene to polytetrafluoroethylene can greatly improve its mechanical properties. At the same time, maintaining other excellent properties of polytetrafluoroethylene. Filled varieties include glass fiber, metal, metal oxide, graphite, molybdenum disulfide, carbon fiber, polyimide, EKONOL, etc. The wear resistance and ultimate PV value can be increased by 1000 times. Painting on the surface of the bullet warhead can increase the penetrability of the bullet, allowing the bullet to shoot through the bulletproof vest.