| 摘要 |
PURPOSE:To bond a metal layer strongly to the surface of thermoplastic resin molding body to copy the shape of die exactly by bonding metal having a particular melting point directly to thermoplastic resin having a particular thickness. CONSTITUTION:Onto the surface of molding product having a three dimensional structure an alloy with a melting point of 70-420 deg.C at while melting or a semi- molten state is present is applied 1-200mum thick. All types of synthetic resins that are generally used for injection molding are available as thermoplastic resin. As an example, polystyrene, polyolefine, polyvinyl chloride, ployester, or their modified, copolymerized, and mixed materials are those available as thermoplastic resin. The alloy is preferably to have a melting point of 70-230 deg.C, and more preferably to have a melting point of 150-250 deg.C, and is typically a noneutectic alloy of tin-zinc or tin-bismuth that presents semi-molten state when injection molding of thermoplastic resin that as base material is carried out. The thickness of the metal to be bonded onto the surface of synthetic resin is preferably 15-150mum, and more preferably 40-130mum. |
