Plastic surface local electroplating method

Abstract

The invention discloses a plastic surface local electroplating method which is used for locally electroplating accessories in the industries such as bathroom, electronics, automobiles, household appliances. The method comprises the following steps: putting a plastic base material to physical vapour deposition vacuum equipment to be vacuumized, carrying out plasma cleaning and activation on the plastic base material when vacuum degree reaches 10-2Pa, depositing a metal conducting layer in vacuum on the surface of the plastic base material which is activated, performing precise laser etching to remove local conducting layer from the plastic base material which is electroplated with the metal conducting layer, obtaining a required pattern, and performing electroplating or electroplating after-treatment to the plastic base material which is etched by laser. By the method, a high pollution plastic electroplating pre-treatment process is replaced by the physical vapour deposition for depositing the metal conducting layer, so that the wastewater discharge and environment pollution are largely reduced; and in addition, partial electroplated conducting film layer is removed through the laser etching, the plastic in the area is not conductive, and the purpose of selective metallization is reached.

Description

technical field [0001] The invention belongs to the field of plastic surface treatment, in particular to a method for partial electroplating of plastic surfaces, which is applied to partial electroplating accessories in industries such as sanitary ware, electronics, automobiles, and home appliances. Background technique [0002] The metallization process on the surface of the plastic substrate can achieve the functions of corrosion resistance, wear resistance and beautiful appearance, and has been widely used in automobiles, electronics, household appliances, kitchen and bathroom and other fields. In these fields, some structural components and some parts need to be coated, some parts do not need to be coated, or some transparent materials need to be partially transparent after surface treatment. In the early days, for structural components that did not require electroplating, it was generally realized by two-color injection molding or a combination of various accessories. T...

AI Technical Summary

Problems solved by technology

In the early days, for structural components that did not require electroplating in parts, it was generally realized by two-color injection molding or a combination of various accessories. The operation process was complicated and costly, and the traditional plastic partial electroplating process had three major disadvantages:

[0003] (1) Plastics that can be electroplated are limited to ABS, ABS+PC and a few nylon materials;

[0004] (2) Pre-plating treatment (phosphide degreasing, high chromic acid roughening, precious metal catalysis, electroless copper / nickel plating, etc.) not only uses some toxic and harmful substances, but also produces a large amount of sewage during the production process, which is not environmentally friendly;

[0005] (3) The traditional partial electroplating of plastics generally adopts the method of sticking tape, which is difficult to apply to the surface of complex workpieces, and the precision of the tape method is not enough

[0006] Chinese patent CN 101736371A discloses the use of electroplating pretreatment (phosphide degreasing, high chromic acid roughening, noble metal catalysis, electroless copper / nickel plating, etc.) to plate copper / nickel, and then remove unnecessary coatings by laser etching. The process of this method is complicated, the pollution is serious, and it is not environmentally friendly.