| 摘要 |
PURPOSE:To form a film, having a high adhesive power and uniform thickness, through processing of it in a short time, by a method wherein, after a specified 2-stage formation processing is conducted, a thermoplastic fluoro resin film is fusion-bonded by heat to a surface of an aluminum plate. CONSTITUTION:After a surface cleaning process is made on an aluminum (alloy) plate with a surface roughness of about 2mum or less, (i) a hydrarated oxide film is formed on the plate surface by immersing it in an aqueous solution, containing a basic organic compound, i.e., a triethanolamine aqueous solution of a density of about 0.2-1.5 volume %, at not lower than about 90 deg.C for about 1-15min. After it is washed with water, (ii) a resultant work is immersed in an aqueous solution, containing alkali silicate, i.e., a sodium silicate aqueous solution of a density of about 0.35-1.05 volume %, at not lower than about 90 deg.C for 1-15min to perform a formation process again. Then, a thermoplastic fluorine film is thermally fusion-bonded to the aluminum (alloy) plate, whereon said 2-stage clenical conversion process is carried out, by a hot press process. |
