초록

Process to adhere PTFE in film or in sheets adhere to metal or plastic substrata which comprises:

대표청구항 ▼

[ What is claimed is:] [1.] Process to adhere polytetrafluoroethylene in film or in sheets to metal or plastic substrata which comprises:1) roughening the substratum surface;2) spreading on a polytetrafluoroethylene sheet or film a suspension comprising a solvent or water and a compound of a fluoroe

[ What is claimed is:] [1.] Process to adhere polytetrafluoroethylene in film or in sheets to metal or plastic substrata which comprises:1) roughening the substratum surface;2) spreading on a polytetrafluoroethylene sheet or film a suspension comprising a solvent or water and a compound of a fluoroelastomer of vinylidene fluoride (VDF) with perfluoropropylene (HFP), optionally in the presence of tetrafluoroethylene (TFE), with polytetrafluoroethylene, with a ratio fluoroelastomer/polytetrafluoroethylene comprised between 80:20 and 20:80% by weight;evaporating the solvent or water;sintering between 330.degree. C.-400.degree. C., for a time comprised between 1 and 10 minutes;then cooling;3) covering the polytetrafluoroethylene treated in step 2) again with a suspension of the same fluoroelastomer of 2);4) contacting the substratum of step 1) with the polytetrafluoroethylene sheet treated as in 3); andcompressing the coupled substratum/polytetrafluoroethylene sheet treated as in 3) at a temperature comprised between 150.degree. and 200.degree. C.