CLEANABLE HIGH EFFICIENCY FILTER MEDIA STRUCTURE AND APPLICATIONS FOR USE

摘要

Cartridge, typically in cylindrical or panel form that can be used in a dry or wet/dry vacuum cleaner. The cartridge is cleanable using a stream of service water, or by rapping on a solid object, or by using a compressed gas stream, but can provide exceptional filtering properties even for submicron particulate in the household or industrial environment. The cartridge has a combination of nanofiber filtration layer on a substrate. The nanofiber layer has a fiber diameter of about 0.05 to 0.5 micron, a nanofiber layer basis weight of about 3 x 10<-7> to 6 x 10<-5> gram-cm<-2>, an air permeability of about 1 to 1000 ft/min at 0.5 inch (water) DeltaP, and a pore size of about 0.01 to 100 microns. The substrate layer is preferably pleated, comprising a basis weight of about 0.2 oz -yd<-2> to 350 lb 3000 ft<-2> , a thickness of about 0.001 to 0.2 inches, the overall filter having a permeability of about 1 to 200 ft-min<-1> of 0.5 inch (water) DeltaP, an efficiency in removing a 0.76 micron particle at 10 ft-min<-1> of about 10 to 99.99995%.