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Hangzhou Su Tai Technology Co., Ltd. has accumulated years of experience in the treatment of organic waste gases in the manufacturing of optoelectronic products. The production processes of five main product categories contribute to the generation of organic waste gas pollution in optoelectronic products: semiconductor integrated circuits, TFT-LCD, LED, printed circuit boards (PCB), and electronic terminal products. Below, we will focus on the treatment of organic waste gases in printed circuit boards (PCB).
In the manufacturing processes of single-sided, double-sided, and multi-sided printed circuit boards, the VOCs are relatively concentrated in certain process steps, primarily from processes such as film lamination, drying, copper plating, and printing. The main types of VOCs emissions include formaldehyde, alcohols (ethanol, butanol, propanol), ketones, and esters (butyl acetate). Additionally, the storage of organic solvents can also generate and emit some VOCs.
In the PCB manufacturing process, besides VOCs, the emitted waste gases also include acidic and alkaline inorganic gases, volatile organic compounds (VOCs), and dust emissions. Due to the complex production process and the use of numerous raw and auxiliary materials, the types and complexity of emitted VOCs vary greatly among different manufacturers. However, the overall concentration of the waste gases is relatively low. The treatment usually involves a combination of water absorption, zeolite wheel adsorption and concentration, and high-temperature incineration. An additional dust filtration device is required, typically using bag filtration.
