Shanghai Daoqin Plastics Co., Ltd.

plastics spray coating process process/workflow has 五 方面: 　1.退火: plastics molding easy formed internal stress, coating rear force in easy cracking. can using/adopting 退火处理 or 整面处理, remove force. 退火处理 is ABS plastics molding parts add hot to heat deflection temperature (HDT) below/following, 即60℃, temperature 2h. due to using/adopting types process need a large amount of equipment investment, therefore, can using/adopting 整面处理 technology, 即配置 can remove parts internal stress solvent liquid in room temperature lower for parts surface 进行15～20min 处理即 can. 　 2. remove 油: plastics parts surface has 油污, and demolding agent, it make coating material force 变差, coating generate crazing, and 脱落. coating front 应进行 remove 油处理. for plastics parts commonly used or 酒精清洗, rear chemical remove chemical remove rear 应彻底清洗工 parts surface alkali liquid, use pure water most rear dry 净, dry or dry. 　 3. remove electrical and remove 尘: plastics products is insulation 体, surface electrical retardant generally in 1013Ω left right, easy generate electrical. belt/tape electrical rear easy 吸附空 gas in fine small 灰尘而附 于 surface. electrical 吸附 灰尘 use generally gas method remove separation difficult, using/adopting high pressure 离子化空 gas meanwhile remove electrical remove 尘 效果 relatively good. 　4. spray coating: plastics coating thick degree is 15~20μm, usually need spray coating 2~3道才 can formed. spray coating rear dry 15min, again 进行第二次 spray coating. need light surface also must spray coating transparent coating material. coating rear made parts for/regarding flame retardant property can basic has effect/influence. 　 5.烘 dry: coating rear can in room temperature lower dry, can in 60℃ conditions lower 烘烤30min.