HEPA (H-10) Performance Synthetic Nonwoven And Nanofiber Composite Filter Media

摘要

A composite filter media structure (10) is disclosed. The structure (10) includes a base substrate (12) that includes a nonwoven fabric substrate formed from a plurality of bicomponent synthetic fibers (30) using a spunbond process. The composite filter media structure (10) includes a nanofiber layer (20) deposited on one side of the base substrate by an electro-blown spinning process. In one aspect, the base substrate (12) and the nanofiber layer (20) are configured to provide at least an 85% filtration efficiency measured in accordance with an ASHRAE 52.2-1999 test method.