needlona® Filter Media
Synthetic Needle Felts as Roll Goods

needlona®-Needle Felts - the right filter media for every possible application

BWF Envirotec offers you a comprehensive range of needlona®-filter media. These are usually made of a fibre layer and a supporting scrim. Due to the multi-layer fibre construction and the supporting scrim, needlona®-needle felts are extremely compact, stable and mechanically robust.

Every scrim and fibre type has unique thermal, physical and chemical properties that are decisive for the performance and operational life of the needlona®-needle felts. In addition, the ways of combining the different scrims and fibre types into a needlona®-needle felt are almost unlimited. Based on decades of experience, our specialists from the Process and Application Technology match scrims and fibre types to your individual filtration process. This allows us to offer you needlona®-needle felts, which are exactly tailored to the technical requirements of your dust collector.

Fibre and scrim types and their resistance to chemical impacts and temperature

Scrim and Fibre Types Continuous           operating temp* BWF Envirotec Designation Resistance to Hydrolysis Resistance to Acids Resistance to Alkalis** Resistance to Oxidation
Polypropylene 194°F - 203°F            PP excellent excellent excellent restricted
Polyamide 230°F - 239°F            PA restricted restricted good restricted
Polyacrylnitrile copolymer 239°F - 248°F            AC restricted restricted good good
Temperature resistant Olefin 257°F - 275°F            RO excellent excellent excellent restricted
Polyacrylnitrile homopolymer 257°F - 284°F            DT good good good good
Polyester 302°F - 302°F            PE restricted good restricted good
Polyphenylene sulfide 374°F - 392°F           PPS excellent excellent excellent restricted
m-Aramide 392°F - 428°F         NO, NX restricted restricted restricted good
Polyimide 464°F - 500°F            PI good restricted restricted good
Polytetrafluorethylene 482°F - 536°F       PTFE, TFL excellent excellent excellent excellent

 *Chemical gas stream conditions may require a lower continuous operating temperature to be maintained.

**especially in case of operation below the dew point and harmful impact of aerosols.


Many production steps and needling processes with our modern machinery are needed to turn fibres and scrims into a needlona®-needle felt. The needle felt is subsequently further mechanically processed, for example, smoothed, calendered and then heat set. Afterwards, the needle felt can be refined with a surface or protective finish.

 

 


Each of our needlona®-needle felts is characterised by the following technical data:

  • Fibre layer and supporting scrim
  • Area weight [ISO 9073-1]
  • Temperature resistance
  • Thickness
  • Air permeability [EN ISO 9237]
  • Pore volume
  • Tensile strength and elongation [ISO 9073-3]
  • Max. dimensional change
  • Surface and other properties

Of course, our needlona®-needle felts are available in any length and width.