Patent ID: 6534182
Filing Date: 2003-03-18
Classification: B29C,B29K,B32B,C08J,Y10T

Abstract:
A surface-treated tetrafluoroethylene-ethylene copolymer film, wherein polar groups are present on the surface of said surface-treated film, and the surface roughness Ra of the surface of the surface-treated film is at most the surface roughness Ra of the surface of the same tetrafluoroethylene-ethylene copolymer film which has not been surface-treated and the amount of fluorine atoms present on the surface of an aluminum plate obtained by hot-pressing the aluminum plate on the surface of said surface-treated film at 100Â° C. under a surface pressure of 21 kgf/cm2 for 10 minutes, followed by cooling to room temperature and separation, is at most one time of the amount of fluorine atoms present on the surface of an aluminum plate obtained by said hot-pressing of said aluminum plate on the surface of the same tetrafluoroethylene-ethylene copolymer film which has not been surface-treated followed by cooling to room temperature and separation.