| abstract |
A tetrafluoroethylene-ethylene copolymer (ETFE)nfilm, wherein polar groups are present on the surface ofnthe film after a surface treatment, and the surfacenroughness R a is at most the surface roughness R a of thensurface of an untreated film; an ETFE film, wherein polarngroups are present on the surface of the film after ansurface treatment, and the amount of a weak boundarynlayer is at most one time of the amount of a weaknboundary layer on the surface of an untreated film; anlaminate employing such a film having an extremelynexcellent bonding strength; and a process for producingnit with a mass production property. |