Patent ID: 6471740
Filing Date: 2002-10-29
Classification: B01D,D04H,D06M,F24F

Abstract:
An air filter for trapping air-born particles, comprising:a filter medium, wherein the filter medium does not release gaseous organic substances more than about 10 &mgr;g/g-sample measured by dynamic headspace-gas chromatography/mass spectroscopy at 150Â° C. for 30 minutes; and a sealing material, wherein the sealing material does not release gaseous organic substances more than about 50 &mgr;g/g-sample measured by dynamic headspace-gas chromatography/mass spectroscopy at 150Â° C. for 30 minutes; wherein the gaseous organic substances are aliphatic hydrocarbons having fewer than 20 carbon atoms, phenolic compounds having molecular weights of less than 300, carboxylIc acid esters having molecular weights of less than 400, and organic phosphorous compounds having molecular weights of less than 300.