Non-stick coating system with high and low melt viscosity PTFE for concentration gradient

摘要

Improved non-stick coating systems can be applied to untreated smooth substrate with a primer of a first polytetrafluoroethylene having a melt viscosity over 1010 poises plus a second polytetrafluoroethylene having a melt viscosity in the range of 104 to 108 poises to give a concentration gradient.