Filter media as roll goods
made of needle felt and glass fibre fabric
2,100 different filter media in rolls means we have the right kind of filter medium for any type of dust and industrial filter.
We produce roll goods made of synthetic needle felt for ready-made products. We process all common polymer fibres into filter media, and also develop custom products on individual request.
Our filter media are made of synthetic fibres. Supporting fabric also provides excellent stability. Each fibre features specific properties that make the filter medium uniquely suited to its field of application. Every type of dust that accumulates during industrial production has different characteristics: Fine, sticky, abrasive, chemically aggressive, hot or even explosive. This is why each kind of dust requires a specially developed filter medium.
Filter media delivery programme
- Synthetic needle felt with and without ePTFE membranee
- Glass fibre fabric with ePTFE membrane
- Working width up to 2.60 m
- Basis weight from 250 to 950 g/m²
- Designed as web material or slotted roll material
- Core product catalogue for filter media with shortest delivery times
- Custom-built and developed products at customer request
Producing roll goods at BWF Envirotec
Working over a multi-step process, our high-tech machinery creates highly effective needlona® needle felt from fibres and fabrics. Our filter media's multilayer fibre structure and supporting fabric make them extremely compact, dimensionally stable and mechanically resilient. Thermal processing methods, for example, include single singed, unsinged, singed on both sides, calendered on one side or smoothed on one side.
In the final step, application-specific surface finishes and protective treatments developed at our R&D competence centre are applied.
Filtration fibres and their interaction with different types of dust
Scrim and fibre types | Contin. Temperature* (Peak) Contin. Temperature* (Peak) | BWF Envirotec Designation BWF Envirotec Designation | Hydrolysis-Resistance Hydrolysis-Resistance | Acid-Resistance Acid-Resistance | Alkali-Resistance Alkali-Resistance | Oxidation-Resistance Oxidation-Resistance |
Polypropylene | Contin. Temperature* (Peak) 95 °C/(95 °C) | BWF Envirotec Designation PP | Hydrolysis-Resistance excellent | Acid-Resistance excellent | Alkali-Resistance excellent | Oxidation-Resistance limited |
Polyamide | Contin. Temperature* (Peak) 110 °C/(115 °C) | BWF Envirotec Designation PA | Hydrolysis-Resistance limited | Acid-Resistance limited | Alkali-Resistance good | Oxidation-Resistance limited |
Polyacrylnitrile copolymer | Contin. Temperature* (Peak) 115 °C/(120 °C) | BWF Envirotec Designation AC | Hydrolysis-Resistance limited | Acid-Resistance limited | Alkali-Resistance good | Oxidation-Resistance good |
Temperatur-resistant olefin | Contin. Temperature* (Peak) 125 °C/(135 °C) | BWF Envirotec Designation RO | Hydrolysis-Resistance excellent | Acid-Resistance excellent | Alkali-Resistance excellent | Oxidation-Resistance limited |
Polyacrylonitrile homopolymer | Contin. Temperature* (Peak) 125 °C/(140 °C) | BWF Envirotec Designation DT | Hydrolysis-Resistance good | Acid-Resistance good | Alkali-Resistance good | Oxidation-Resistance good |
Polyester | Contin. Temperature* (Peak) 150 °C/(150 °C) | BWF Envirotec Designation PE | Hydrolysis-Resistance limited | Acid-Resistance good | Alkali-Resistance limited | Oxidation-Resistance good |
Polyphenylene sulphide | Contin. Temperature* (Peak) 190 °C/(200 °C) | BWF Envirotec Designation PPS | Hydrolysis-Resistance excellent | Acid-Resistance excellent | Alkali-Resistance excellent | Oxidation-Resistance limited |
m-Aramide | Contin. Temperature* (Peak) 200 °C/(220 °C) | BWF Envirotec Designation NO, NX | Hydrolysis-Resistance limited | Acid-Resistance limited | Alkali-Resistance limited | Oxidation-Resistance good |
Polyimide | Contin. Temperature* (Peak) 240 °C/(260 °C) | BWF Envirotec Designation PI | Hydrolysis-Resistance good | Acid-Resistance limited | Alkali-Resistance limited | Oxidation-Resistance good |
Polytetrafluorethylene | Contin. Temperature* (Peak) 250 °C/(280 °C) | BWF Envirotec Designation PTFE, TFL | Hydrolysis-Resistance excellent | Acid-Resistance excellent | Alkali-Resistance excellent | Oxidation-Resistance excellent |
Fibreglass fabric | Contin. Temperature* (Peak) 260 °C/(288 °C) | BWF Envirotec Designation GL | Hydrolysis-Resistance good | Acid-Resistance limited | Alkali-Resistance limited | Oxidation-Resistance excellent |