Patent ID: 7344035

Claim:
A fabric suitable for use in the manufacture of filters which will be used in a high ambient temperature environment, the fabric comprising: a knit backing which is knitted from a heat resistant aramid yarn, said knit backing having a front side and a back side; individual pile fibers which are made of a heat resistant aramid material and which are knitted into said knit backing, said pile fibers extending outwardly from said front side of said knit backing to form a pile on said front face of said knit backing and wherein said individual pile fibers include at least approximately 20% meta-aramid fibers, said knit backing and said pile forming a filter material having a porosity sufficient to remove particulate of about 2.5 microns or greater from the high ambient temperature environment; and a polymeric coating on said back side of said knit backing which is made of a heat resistant material.