| 摘要 |
PURPOSE:To increase strength and rigidity and to give a metallic appearance, by a method wherein synthetic resin is used as a base polymer for the material of a watchcase and metal powder, reinforce fiber and a plating accelerator are blended therein, while metal plating is applied on the surface of the case. CONSTITUTION:Synthetic resin is used as a base polymer, metal powder, reinforced fiber and a plating accelerator are blended therein, specific gravity is set to be 2-8, and a wet-type metal plating treatment comprising etching, electroless plating and electroplating is applied on the surface. The synthetic resin of the base polymer plays a role of combining are reinforcing various blended materials, and such resin as nylon, polycarbonate, polybutylene terephthalate, polyphenylene terephthalate or the like which can be injection- molded is usable therefore.
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