Abstract: Polytetrafluoroethylene（PTFE） membrane filter material was fabricated by hot lamination process which was pretreated with self-developed PTFE foam coating agent. SEM analysis showed that surface filtering is the main mechanism for the dust removal, the results of fastness test and the study on filtering properties indicated that PTFE membrane combined firmly with the PPS based filter media. The advantages of PTFE membrane filter media were high dust removal efficiency, high filtering precision, low run resistance, easily to remove the dust and long natural life and so on. It can effectively control the emissions of super fine dust such as PM2.5, and it could be widely applied in coal fired power plant, cement industry, garbage incineration, chemical plant and other relative areas for the removal of high temperature dust.

Key words: polytetrafluoroethylene, foam coating agent, abhesive-free hot-pressing, membrane filter material, surface filtration