プラスチックへのメッキに関する研究

第1報 前処理について

抄録

When the following pretreatments are applied in ABS resin, electroless copper having good adhesive property can be obtained as an undercoating for electroplating.
Chemical roughing CrO₃ 33g/l, conc. H₂SO₄ 800cc/l, 60-70°C, 1min↓Water rinsing Neutralization 10% NaOH, room temp.↓Water rinsing Sensitizing SnCl₂⋅2H₂O 40g/l, conc. HCl 70cc/l, room temp. 1min↓Water rinsing Activating AgNO₃ 1.5g/l, conc. NH₄OH 1.2cc/l, room Temp., 1min↓No rinsing↓Reducing 10% (vol.), formalin solution, room temp., a few sec.↓Drying 60-70°C↓No rinsing Electroless copper
When such pretreatments are applied, costly mechanical roughing process can be omitted and noble metals for activation are not needed, further more, the quality is far superior to the ones which are treated for activation with noble metals such as Pd or Au.