Based on the analysis of the development status of domestic FRP products, the following three surface coating processes of FRP products have the most promising development prospects.

1. Dipping and spraying process

Dipping process is suitable for small and regular products; The spraying process is suitable for products with large surface area and regular shape. If this method is used to stop painting FRP products, the coating surface quality is good and the investment is not high. The key point of this process lies in the control of heating temperature and the number of additives during coating configuration. The coating quality is closely related to the viscosity and plasticizing temperature of the coating. The film thickness of 0.1-0.15mm is suitable for the quantitative index of plastic dipping and spraying process. Inorganic water-based coating is the best technology for this technology. The application of this coating has high price and large one-time investment, but it has good maintenance and decoration effect. The volatile after coating is water, without environmental pollution, and the coating can be self-cleaning.

2. Plastic spraying process

Electrostatic spraying has the advantages of high coating efficiency, average coating and low pollution, which is suitable for the automatic coating consumption line. Due to the development of various high performance, medium and low temperature curing powder coatings, the application prospect of this process in FRP is promising. The technical difficulty lies in the electrostatic conduction of FRP.

The hot melt plastic spraying process is developed by separating the "plastic coating process" from the "performance of FRP products". It is similar to the electrostatic plastic spraying process, but it omits the electrostatic conduction requirements for FRP products in the electrostatic plastic spraying process, and the powder plasticizing temperature is low. Because of the above advantages, the process is suitable for FRP products with large base materials. The key technology lies in the pretreatment process of FRP surface and the substrate temperature.

The powder impregnation process is important to apply to high temperature resistant thick wall FRP products, especially the surface coating of products with special function requirements, to increase the function of products.

3. In mold coating technology
 
In mold coating technology is a relatively high degree of external coating technology in the world, which is mainly applied to SMC molded products. This process omits the secondary priming process and the required equipment, prevents the pollution of volatile solvents, and deals with the defects of conventional molded products and secondary coating, such as pinholes and blisters.

The surface coating technology of FRP products is a new technology with simple process, low cost, reliable performance and good development prospects.

Guangzhou Tuoshen Surface Treatment Co., Ltd., the spraying manufacturer, is preferred for purchasing spraying, Spray processing Factory, trustworthy