Applying a fluoropolymer film to a body
AssigneeBritish Technology Group Limited
InventorThomas Ronald Thomas
Life of this patent
Estimating the term…
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. The perfluorocyclohexane molecules undergo scission and the fragments combine on the substrate to make a fluoropolymer film wherein the pores of the substrate have not been completely closed by the coating.
Claims15
A method of applying a fluoropolymer film to a porous or microporous body, comprising exposing the body to a supply of saturated molecules of the formula C.sub.n F.sub.2n, where n=4-8, causing scission of the molecules, and allowing the fragments to combine on the surface of the body to form an adherent fluoropolymer layer, and ceasing exposure of the body to the supply of saturated molecules before the pores of the body have been completely closed by the deposited fluoropolymer.
Dependencies are inferred from the claim text.