Improving filtration performance with new fiber finish technology

M. Bergmann*, FiberVisions, Denmark; Z. Lee, FiberVisions, USA

We have developed a fiber finish that delivers improved filtration efficiency performance in HVAC filters comprised of fiber-based nonwoven media. We demonstrated the filtration efficiency improvement of the HVAC filter in the MERV 7-12 space according to ASHRAE 52.2 or G4-M6 space according to EN 779 2012.

Our results are exemplified with bicomponent fibers with polyethylene (PE) as the sheath polymer and polyethylene terephthalate (PET) as the core polymer. These fibers were made on FiberVisions pilot fiber lines. All nonwoven filter media used for the testing were produced on a pilot card and bonded in an air through oven in the FiberVisions facility.
We studied various fiber finishes for their effect on filtration efficiency, including those purpose-designed for this application. A new finish has been developed that seems to increase the inertia/impaction capture mechanism, as well as the interception effect.

We shall present the results from two pleated filter media constructed of 100% 3,3 dTex, (19,2 ┬Ám diameter) PE/PET bicomponent fibers with a basis weight of 70 g/m2 (2,1 oz/yd2). The reference nonwoven was comprised of fibers with a standard carding finish. The improved nonwoven uses similar fibers with the new finish. Various filtration performance criteria were tested, including E3, E2, and E1 efficiencies, as well as the internal resistance (IR). The testing was performed, according to ASHRAE 52.2 on...

Session: G11 - Short Oral + Poster Presentations
Day: 12 October 2016
Time: 14:45 - 16:45 h