The principle of PP surface treatment agent to improve the adhesion between plastic and paint

The use of plastic surface treatment agents in the spray painting process of plastic parts is mostly due to the unevenness of the plastic coating during the spray painting process. The primer treatment agent is used to improve the adhesion between the paint and the plastic substrate, thereby improving the spray paint production Yield and quality.

Common plastic surface treatment agents are distinguished by different substrates, such as nylon plastic surface treatment agent , PP plastic surface treatment agent, POK plastic surface treatment agent, other plastic surface treatment agents, etc. The role of the treatment agent has little to do with the choice of paint, but it is related to the molecular structure and adhesion of the substrate.

The principle of action of the plastic surface treatment agent follows the intermolecular force and chemical bonding in the adhesion theory, so that a dense film is formed on the surface of the substrate, thereby improving the adhesion properties of the plastic surface, and at the same time forming a good bonding force with the coating. Cross-linking such as chemical bonding. But there is also a part of the treatment agent, through the plastic surface treatment agent resin through the dissolution and swelling action, and the plastic substrate to form a mechanical bond, and at the same time embedded with the paint.

All in all, the role of plastic surface treatment agent is to act on the surface of the plastic by means of primer coating to enhance the interlayer adhesion between the plastic and the coating. Its use method is simple and conforms to the coating production process. Take the PP plastic surface treatment agent as an example: After the PP plastic surface treatment agent is cleaned, spray the plastic surface treatment agent, such as the cross spray method, with a film thickness of 3~5μm. Bake at 60~70°C for 3~5 minutes, spray paint until the paint surface is fully dry.

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