PURPOSE: To certainly seal a resin laminated metal by treating the surface of the fluoroplastic film positioned at a sealing part so as to impart predetermined surface tension or more thereto.
CONSTITUTION: At first, the end part of a resin laminated metal formed by laminating a fluoroplastic film 2 to the surface of an aluminum plate (metal substrate) 1 is bent at a right angle to form a sealing part 3. Two resin laminated metals A, B having the sealing parts 3 thus formed thereto are prepared. Subsequently, surface treatment is applied to the fluoroplastic films 2a positioned at the sealing parts 3 of the resin laminated metals A, B to set the surface tension of the fluoroplastic films 2a to 30dyne/cm or more. As this surface treatment, corona discharge treatment or chemical etching treatment due to a sodium complex is pref. Thereafter, a sealing material 4 is interposed between the sealing parts 3 to perform sealing between both resin laminated metals A, B. By this method, even the resin laminated metal can be certainly sealed.
MIMURA IKUO
HABASAKI YASUHARU
HOJO NORIHISA
ISHIDA SUSUMU
MURAMOTO TADANORI
