| 摘要 |
PURPOSE:To obtain a synthetic resin fuel tank with wall structure having low permeability of fuel oil by a simple and lowcost method wherein metallic carbonyl salt is charged in the interior of a parison so as to form a metal coating through deposition during blow forming process by decomposing the metallic carbonyl salt with the heat given by the heated parison. CONSTITUTION:Metallic carbonyl salt is suitable for the metal compound used for gas phase plating. For example, nickel carbonyl is easily vaporized by carrier gas such as carbon dioxide gas, nitrogen and hydrogen, has the decomposition point of about 185 deg.C and yet is very stable in liquid solution and consequently is easy to handle. In order to obtain a synthetic resin fuel tank by blow forming, first, a parison 1 is pinched by molds 2 which have inner holes with the shape of a fuel tank. Secondly, the air is blown in the interior of the parison 1 in order to inflate it. Finally, an obtained molded part 3 is cooled down. Metal coating is uniformly formed on the inner wall of the molded part 3 by decomposing the metallic carbonyl salt utilizing the heat of the parison 1 generated during blow forming. |
