The era of thick film coating with three-proofing paint is approaching

Early three proof coatings mostly used solvent based adhesives. According to IPC requirements, most of them were in the range of 25-75um. In order to cope with increasingly fierce market competition, we basically pressed the thinnest coating, resulting in some products losing protection in the short term. Moreover, due to incomplete curing of the coating after production, some solvents evaporated, causing corrosion of galvanized parts in some products. In addition, the country has already set a limit on VOC for industrial coatings. In the past two years, many companies have switched to UV coating and achieved a film thickness of 80-150um to complete the waterproof process application.

The current state of the industry is a contradictory process where solvent based adhesives want to be thick and UV based adhesives want to be thin. In fact, according to standard processes, most manufacturers have already met product protection requirements when selecting adhesives based on how to measure product performance. Taking into account the cost, we will explain the testing method to you as follows:

1. Spray different thicknesses on the same IPC test board,

2. Based on the actual application environment of the product, different thicknesses are tested for various testing indicators, and the process thickness and material selection are comprehensively selected.

3. Based on the particularity of UV curing, it is recommended to choose high curing requirements (wavelength, energy, light intensity), and thick coating requires higher light intensity for UV lamps.

Finally, UV materials are not the latest materials, but their applications are not suitable for all products. Perhaps there will be new materials to replace them in the future, and we will wait and see!