COMPOSITE IN WHICH STAINLESS-STEEL PLATE AND MOLDING OF THERMOPLASTIC RESIN COMPOSITION ARE BONDED, AND METHOD FOR MANUFACTURE THEREOF

摘要

PROBLEM TO BE SOLVED: To provide a composite in which a stainless-steel plate and a thermoplastic resin composition are bonded, and the thermoplastic resin composition has an excellent adhesion.;SOLUTION: A stainless-steel plate is immersed in a treatment solution in which an oxidative compound is dissolved in an aqueous solution of ferric chloride to form a plurality of pits on the surface of the stainless-steel plate. Not less than 60% by piece of the pits formed have a ratio of a maximum size D₁ within the pit to a size D₂ of a pit opening (D₁/D₂) of ≥1.05. The ratio (D_t/D₀) of an average thickness D₀ of the oxide film on the surface of the stainless plate before the immersion and an average thickness D_t of the oxide film on the surface of the stainless plate after the immersion is ≥1.1. The composite is manufactured by putting the surface-roughened stainless-steel plate in an injection molding mold and injecting a thermoplastic resin composition into the mold.;COPYRIGHT: (C)2011,JPO&INPIT