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Japan's Daicel Chemical Industry and Daicel Polymer (Headquarters: Tokyo) gave a chromic acid (hexavalent chromium) to Japan's "14th Polymer Materials Forum" (organizer: Japan Polymer Society) The technology of electroplating of resin was delivered. This technology was developed by two companies and forming and electroplating manufacturers. No hexavalent chromium plating is achieved by improving the resin and process that needs to be electroplated.
According to the two companies, currently 85% of the electroplated resins are ABS (Acrylonitrile Butadiene Styrene). In the past, ABS was first immersed in chromic acid, and platinum (Pt) as a catalyst was adsorbed onto the unevenness by the unevenness generated on the surface by the elution of the rubber particles, and electroless plating was performed on the nickel to utilize the anchoring effect (Anchor). Effect) Improve the adhesion strength of plating.
The technology announced by the two companies replaced the ABS with PA (polyamide) and ABS alloy (ABS Alloy) and electroplated it without using hexavalent chromium. The key point of this technology is to improve the compatibility by improving the additives, making ABS easier to distribute in the PA matrix. In addition, by modifying the process to expand the PA, the nickel layer as the plating underlayer can be grown in the expanded layer like a tree rooted in the soil, thereby improving the adhesion strength of the plating. The nickel layer is formed by electroless electroless plating and has a thickness of several hundred μm. With this layer, electroplating is possible. Therefore, the subsequent processes are the same as the conventional processes, and various plating layers such as CuSO4, nickel, and chromium can be formed by electroplating.
According to the two companies, currently 85% of the electroplated resins are ABS (Acrylonitrile Butadiene Styrene). In the past, ABS was first immersed in chromic acid, and platinum (Pt) as a catalyst was adsorbed onto the unevenness by the unevenness generated on the surface by the elution of the rubber particles, and electroless plating was performed on the nickel to utilize the anchoring effect (Anchor). Effect) Improve the adhesion strength of plating.
The technology announced by the two companies replaced the ABS with PA (polyamide) and ABS alloy (ABS Alloy) and electroplated it without using hexavalent chromium. The key point of this technology is to improve the compatibility by improving the additives, making ABS easier to distribute in the PA matrix. In addition, by modifying the process to expand the PA, the nickel layer as the plating underlayer can be grown in the expanded layer like a tree rooted in the soil, thereby improving the adhesion strength of the plating. The nickel layer is formed by electroless electroless plating and has a thickness of several hundred μm. With this layer, electroplating is possible. Therefore, the subsequent processes are the same as the conventional processes, and various plating layers such as CuSO4, nickel, and chromium can be formed by electroplating.
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