Copper drawing and electroplating method for plastic substrate

Abstract

The invention relates to a copper drawing and electroplating method for a plastic substrate, and relates to a plastic surface wire drawing treatment method. According to the method, a plastic substrate is pretreated; the pretreated plastic substrate is subjected to physical vapor deposition metallization, and is sequentially subjected to physical vapor deposition plasma modification, metal bottom layer plating, metal transition layer plating and metal conductive layer plating; direct copper electroplating is performed; a drawing treatment is performed on the surface of the copper electroplating layer; a dry cleaning treatment is performed on the surface of the plastic substrate; nickel electroplating is performed; the resulting material is hung in a PVD furnace to carry out a plasma treatment, and then is subjected to a PVD film plating treatment, or an organic coating spray plating treatment is performed, or a chromium electroplating treatment is performed, or chromium electroplating is performed and finally a PVD film plating treatment is performed. With the present invention, the surface metallization of the plastic material can be achieved; the copper electroplating layer drawing is adopted to replace the nickel electroplating layer drawing so as to reduce the production cost, simplify the electroplating process, substantially reduce the discharge amount of the wastewater, and reduce the pollution to the environment and the human; and the method meets surface drawing function requirements of a plurality of the plastic substrates.

Description

technical field [0001] The invention relates to a plastic surface drawing treatment method, in particular to an environment-friendly electroplating method for plastic substrate copper drawing. Background technique [0002] Conventional plastic electroplating processes include high-concentration chromic acid roughening and hexavalent chromium electroplating, and hexavalent chromium is usually discharged into electroplating wastewater. Chromium in wastewater is relatively harmful to humans and the environment! Common chromium compounds include hexavalent chromic anhydride, potassium dichromate, sodium dichromate, potassium chromate, sodium chromate, etc.; trivalent chromium trioxide (chrome green, Cr 2 o 3 ); divalent chromous oxide. Among the chromium compounds, hexavalent chromium is the most toxic, followed by trivalent chromium. According to research, chromium is a trace element required for the life and health of mammals. Chromium deficiency can cause atherosclerosis....

AI Technical Summary

Problems solved by technology

[0003] Chinese patent CN100552093C discloses a special activator and electroplating process for plastic electroplating. In this process, a large amount of chromic acid (hexavalent chromium) is used for coarsening and electroplating chromium, which is not used for recycling and has great environmental pollution.

So much wastewater not only wastes water resources, but also seriously pollutes the natural ecological environment of human beings, so it is urgent to improve or replace the existing electroplating process

The existing conventional drawing process of plastic electroplating is: degreasing and dewaxing, roughening, activation, sensitization, reduction, chemical nickel, electroplating coke copper, electroplating acid copper, electroplating nickel and then drawing, degreasing, activation, electroplating Chromium or finally PVD, which produces a large amount of waste water and heavy metal pollutants, and drawing on the metal nickel layer wastes expensive metal nickel

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