Adhesion Between Rubber Compounds and Copper-film-coated Steel Plates

Three copper-film-coated steel plates (abbreviated hereafter as copper-coated plate) with different thicknesses of copper film 30 to 90 nm were prepared and their adhesion properties to rubber compounds were examined. The high adhesion of copper-coated plates to the rubber compound containing resinous bonding additives was obtained at normal and over-cure conditions The copper-coated plate containing an amount of copper coating sufficient to plate the surface with a uniform copper layer showed better adhesion than that having a small amount of copper coating on its surface. The stability against green humidity aging and the cause for the high adhesion of the copper-coated plate were discussed compared with those of the brass plate.