PTFE Film
Polytetrafluoroethylene can form useful film, membranes or sheet. (RDC 1/20/2011)
Porous polytetrafluoroethylene (PTFE) membranes are useful in filtration, venting, and/or diffusion/barrier applications. Filtration may use discs or sheets.
Recent US Patents
10/12/2010
7,812,081
Methods of making a mixture for a PTFE membrane with inorganic materials, and compositions related thereto
Thottupurathu of General Electric, New York has an PTFE membrane by extruding a mixture of PTFE resin, 15 to 25 wt% lubricant and 10 wt% porous inorganic fillers less than 100 nm formed into a billet. This is, then, extruded, calendered and biaxially oriented. (RDC 1/11/2011)