High Efficiency Air Filtration: The Growing Impact of Membranes
4 Feb 2015Membrane air filtration is an exciting recent development creating new opportunities through higher performing filter designs in the traditional industrial and newer consumer markets. This case study explores the growing importance of membranes in high efficiency air filtration. As such it covers applications as defined by the EN1822 standard and US/MIL STD HEPA and ULPA classifications, as well as the higher efficiency classes of the EN779 and ASHRAE 52.2 (MERV ratings) standards.
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Evopor™ Membrane
Lydall Performance MaterialsProvides an ultra-hydrophilic platform for critical process filtration. Evopor™ membrane is a naturally hydrophilic, supported membrane manufactured to provide uniform wet out and maintain its strength during use in critical filtration applications. Unlike polyethersulfone (PES) and polyvinylidene fluoride (PVDF) membranes, Evopor membranes are comprised of Ethyl Vinyl Alcohol (EVOH) to provide an unparalleled ultra-hydrophilic surface.The support is based on Lydall’s Solupor® membrane and delivers high porosity, superior dimensional strength, higher flux, and ease in handling during cutting, pleating, and sealing in filtration device manufacturing. The membrane is available in roll widths up to 60cm as well as custom cut sheets and disks for the required application.Features: Microporous support Low particulates EVOH composition Benefits: Higher flux Biocompatible Ultra-hydrophilic surface Applications: Critical Process Filtration Analytical Chemistry Food & Beverage Processing Medical Devices Pharmaceutical Processing
Solupor® HF Membrane
Lydall Performance MaterialsA next generation microporous membrane for a full range of consumer electronic applications. Solupor® membrane has a unique combination of high porosity of >80% and low thickness, which makes it possible to achieve very low electrical resistance in capacitor applications. With its superior mechanical properties, microporous structure, and smooth surface, Solupor membrane is an ideal substrate for the construction of proton exchange membrane commonly used in fuel cells. Features: Gamma sterilization compatibility High air flow / low pressure drop Biocompatible (USP CLass IV) High membrane integrity Excellent chemical resistance Benefits: No Failures from brittleness Reduction of Filter size used Regulatory compliance Durable products Usable in stringent environments Applications: Consumer Electronic Devices Lightweight Batteries Super capacitors Fuel cells