... manufacturing processes are strictly implemented according to ISO Name:Nonwoven Needle Punched Felt Filter Bag-Filter SleeveMaterial:Polyester, ... ,PPS(ryton),P84, PTFE.Description:we offer normal and high temperature needle feltProduct range (by application):a. ... includes: Singed, calandered, PTFE membrane and heat set.Application: liquid filtration and industrial dust collection (blast furnace gas, ...