Filter bags made of PPS needle felt with PI fibers (polyimide) admixture create a medium with specific properties.

This needle felt ensures a very good material resistance in a working environment typical for PPS, while the PI fibers have characteristics that significantly increase the filtration efficiency.

The mixture of these fibers, combined with a special needling technique, ensures high filtration efficiency while maintaining high air permeability. This results in a lower pressure drop and a smaller residual dust content.

There are many combinations which, depending on requirements, can be used in construction of such a felt, for example:

  • PTFE fiber support
  • additional microfibers
  • oil and water repellent treatment
  • protective treatment against acids, alkalis and hydrolysis
  • two-sided glazing

Applicable mainly in the following:

  • power plants
  • heating industry
  • desulphurization plants
  • foundry industry
  • cement industry