title: Preparation and characterization of porous composite filter medium by polytetrafluoroethylene foam coating.
abstract: The high costs of ceramic and Teflon filter media for hot gas cleaning has limited their industrial applications. This paper presents a foam coating technology that can be used to produce an inexpensive and highly efficient filter for industrial applications. A new apparatus was designed and built that coats porous glass mats with liquid-phase polytetrafluoroethylene (PTFE). The machine generates bubbles, enables the formation of uniform micropores less than 45 microm in diameter, and produces a product with air permeability greater than 5.5 cm3/cm2/sec. The resulting filter was found to be thermally stable up to 270 degrees C without any visible distortion and was comparable in dust collection efficiency to other commercial filter media. In addition, its de-dusting efficiency was greater than 85%, which is similar to that of other test filter media.
authors.affiliation: Green Chemistry and Manufacturing System Division, Korea Institute of Industrial Technology, Youngin, South Korea.
authors.forename: Byung Hyun
authors.initials: BH
authors.lastname: Park
authors.forename: Myong-Hwa
authors.initials: MH
authors.lastname: Lee
authors.forename: Sang Bum
authors.initials: SB
authors.lastname: Kim
authors.forename: Gyung Soo
authors.initials: GS
authors.lastname: Kim
authors.forename: Young Min
authors.initials: YM
authors.lastname: Jo
mesh_terms: D004391:Dust / Q000517:prevention & control*; D004867:Equipment Design; D005374:Filtration / Q000295:instrumentation*; D008855:Microscopy, Electron, Scanning; D010316:Particle Size; D011138:Polytetrafluoroethylene / Q000737:chemistry*; D016062:Porosity
chemical_list: D004391:Dust; D011138:Polytetrafluoroethylene