Polytetrafluoroethylene gasket is abbreviated as PTFE (commonly known as "plastic king"). This material product has the characteristics of acid and alkali resistance, high temperature resistance and resistance to various organic solvents. It is widely used in chemical and pharmaceutical industry and can be called the originator of gasket industry.

Polytetrafluoroethylene as a sealing material has many applications. Because of its high corrosion resistance, stable physical properties, high and low temperature resistance, it has achieved good sealing performance and has been widely used in petroleum, chemical industry, pharmaceutical industry, electric power industry and iron and steel industry. Applicable media include almost all chemical components such as water, oil, acid solution, alkali solution, etc.