Introduction of spraying technology of ultra low temperature curing powder coating

Ultra low temperature solidified powder spraying process is the process commonly used by the main users in Europe and the United States Compared with the UV curing powder process, it has the following advantages: better curing effect on the colored powder coating; less investment in equipment than UV curing; fast curing and spraying; the temperature of the coating in a short period of time reaches more than 150 ℃, while the temperature of the substrate is still within the range that the substrate can bear (below 100 ℃) The difference between ultra-low temperature curing powder coating and UV curing powder coating lies in the variety of powder coating The preheating and spraying process of ultra-low temperature process is exactly the same as that of UV curing process But after spraying powder coating on MDF board, the melting and curing process are mainly realized by infrared radiation heating Because infrared radiation has the characteristics of instantaneous and rapid temperature rise, it can make the coating rapidly rise to the required temperature in a short time, which makes the viscosity of powder coating suddenly reduce, and it can obtain enough time for better melting leveling before the coating begins to cure, so that the surface gloss of the coating is appropriate This process uses low melting point powder coating, which makes the whole process adopt lower heating temperature and shorter curing time It can avoid deformation and cracking of MDF substrate due to a large amount of internal moisture evaporation and volatiles moving out, and blisters and pinholes appear in the coating.