NON-STICK COATING SYSTEM WITH PTFE AND PFA OR FEP FOR CONCENTRATION GRADIENT

摘要

2099615 9210309 PCTABS00013 Improved non-stick coating systems can be applied to untreated smooth substrate with a primer of a polytetrafluoroethylene having a melt viscosity over 1010Pa Sec plus a copolymer of tetrafluoroethylene with hexafluoropropylene or perfluoro alkyl vinyl ether with the melt viscosity of the polytetrafluoroethylene being at least 102Pa Sec higher than that of the copolymer to give a concentration gradient.