Plastic plating is generally carried out by multi-layer plating. If it is not strictly operated, the phenomenon of poor bonding such as blistering and peeling of the plating layer may occur. The reason is not only the following three major types of influence. (1) Influence of electroplating process: improper combination of electroplating layer, large automotive mold temperature difference, and severe stress of nickel layer will affect bonding force. (2) Effects of activation: The factors of binding are often easily overlooked. If the activation layer is sufficiently combined with the roughened surface of the substrate, the electroless plating reaction occurs uniformly, and the bonding force is firm.
Conversely, if the catalytic center is small, the activator is unevenly distributed, and the unreduced activator is present, it is sure Will affect the bonding force, sometimes even if the deposition is complete, there will be no good coating. (3) The influence of chemical roughening: The most direct influencing factor of plastic plating bonding strength is the roughening effect of the product, the lack of coarsening, the bonding strength is definitely not good, the roughening is excessive, affecting the normal structure of the substrate, and the bonding force will also be Not good, so it is very important to roughen just right. From experience, the surface is sufficiently hydrophilic and tarnished after roughening, but it is not suitable for roughening. After electroless plating, the coating is not very bright, but it is not rough or bright. The above is about the ‘three reasons for the poor bonding of plastic plating, how to solve?’
The relevant sharing, I hope to help everyone, want to know more advice, please pay attention: the official website of the city Hengxing Chang Mould Technology Co., Ltd. The company is a wholly-owned plastic mold company and plastic mold manufacturer that integrates mold product development and design, plastic mold, mold manufacturing, injection molding, and oil screen printing.
Tags: automotive mold
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