Applying a fluoropolymer film to a body
AssigneeBritish Technology Group Limited
InventorThomas R. Thomas
Life of this patent
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Abstract
A thin fluoropolymer film is covalently bonded to a microporous ptfe film to make a bilayer for separation, filtration or reverse osmosis, by exposing the microporous film to perfluorocyclohexane under plasma.
Claims8
A method of applying a fluoropolymer film to a porous or microporous film, comprising exposing the porous or microporous film to plasma irradiation wherein the plasma power is less than 5 w and to a supply of saturated molecules of the formula C.sub.n F.sub.2n, where n is from 4 to 8, causing scission of the molecules, whereby fragments combine on the surface of the porous or microporous film to form an adherent fluoropolymer layer.
A method of applying a fluoropolymer film to a porous or microporous film of carbonaceous polymer, comprising exposing the porous or microporous film to plasma irradiation wherein the plasma power is less than 5 w and to a supply of saturated molecules of the formula C.sub.n F.sub.2n, where n is from 4 to 8, causing scission of the molecules, whereby fragments combine on the surface of the porous or microporous film to form a fluoropolymer layer covalently bonded to the film.
Dependencies are inferred from the claim text.