Material: Hereby we will list some of them,include polyester(PE),P84,Acrylic, Aramid(Nomex),PTFE, PPS,polypropylene(PP) etc, and anti-statistic filter bags,heat-resistance filter bags etc. Surface treatment 1)Water and oil repellent treatment: A substantial increase in performance of water and oil repellent  2)Acrylic coating: A substantial increase in Abrasion resistance property 3)Carbon coating: Anti-spark  4)PTFE film: Improve filtration precision: =5gsm/Nm3, but lower the filtration efficiency; and a substantial increase in acid-base resistance property   5)PTFE paint-coating: Improve filtration precision: =10gsm/Nm3, does not lower the filtration efficiency; and a substantial increase in acid-base resistance property  6)PTFE dipping: Improve filtration precision: =25gsm/Nm3, does not lower the filtration  efficiency; and a small increase in acid-base resistance property