Filter bags made of polyacrylonitrile needle felt can have a number of additional properties that are not standard but allow use of this material in more demanding filtration processes.
Additional properties available for polyacrylonitrile include:
- antistatic
- PTFE membrane
- Polyurethane membrane
- two-sided glazing
- PTFE coating with very high PTFE concentration
- additional calandering
- microfibers
- mixture with polyester fibers