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1. Superior emission control, 2. Improved service life, 3. Higher air flows, 4. Cost effectiveness - details see: https://www.machineto.com/2013-newest-expanded-ptfe-membrane-filter-bags-for-bag-house-and-industrial-use-10216934

Some of the main reasons why engineers choose to use an Extended PTFE Membrane for filtration are:

Superior emission control:resulting in a reduction of regulatory fines & the ability to meet more stringent emission codes

Improved service life of filter media:the non-stick PTFE surface promotes dust cake release which reduces the energy needed to keep the filter bags clean. Less wear and ear on filter bags results in longer service life.

Low operating pressure drops:Initial filter bag drag or pressure drop in PTFE membrane filters starts off low and maintains this level better than the alternative conventional media which tends to build dust cake and pressure drop accordingly. Increased pressure drop can be equated with wasted energy to operate a baghouse.

Ability to recover from upset conditions:In plant situations where a baghouse might be subject to thermal, chemical, or moisture upsets, a PTFE membrane coated filter bag has no problem handling these situations since PTFE membranes resist attack by these agents and are ready to recover permeabilty once they are placed back on-line. This could save a baghouse from costly plant shut-downs, and filter bag replacement costs.

Higher air flows:In a baghouse not previously equipped with PTFE membrane coated filter media, substitution of PTFE membrane filter bags results in higher air-flow capability. Alternatively, baghouses designs which incorporate PTFE Membrane filter media from the start often select higher air-to-cloth ratio designs using fewer filter bags.

Cost effectiveness:The initial cost of PTFE membrane filter media may be higher than the alternative conventional filter media, the many benefits listed above provide a strong argument favoring PTFE membrane as the most cost effective filter media when measured over the useful life of the product. As emissions regulations become even more stringent, the same arguments will favor PTFE membrane even more clearly.