How to solve the three major reasons for the poor adhesion of plastic electroplating?

Plastic electroplating generally adopts multi-layer electroplating. If the operation is not strictly performed, the phenomenon of poor adhesion such as blistering and peeling of the coating will often occur. The reasons for this are nothing more than the following three categories of effects.
(1) Influence of electroplating process: improper combination of electroplating layers, large temperature difference, and serious stress of nickel layer will affect the bonding force.
(2) The influence of activation: The factor of binding force is often overlooked. If the activation layer is fully combined with the roughened surface of the substrate, the electroless plating reaction will be uniform and the bonding force will be strong. On the contrary, if there are few catalytic centers, the distribution of activators is uneven, and there are unreduced activators, it must be It will affect the bonding force, and sometimes although the deposition is complete, there will not be a good coating.
(3) Influence of chemical roughening: The most direct factor that affects the adhesion of plastic electroplating is the roughening effect of the product. If the roughening is insufficient, the adhesion is definitely not good. If the roughening is excessive, it will affect the normal structure of the substrate, and the adhesion will also be No, so it's important to get the roughening just right. From experience, after roughening, the surface is fully hydrophilic and loses its luster, but it does not feel rough.

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