No.5（2010）13.Investigation of the VOC components of each paint operation by paint booth simulator

Atsushi Mizukoshi, Toshio Kinoshita, Miyuki Noguchi, Kyoko Saito, YukioYanagisawa

  The composition of VOCs exhausted during each paint operation were investigated by paint simulator. The paint simulator consisted of a paint booth and drying oven, and could simulate the actual paint operation under a controlled condition. While painting and drying flat plates in the paint simulator, the time course of total VOCs and the VOC compositions were investigated. The time course of TVOC concentrations at each duct were measured by FID. The VOC compositions during painting in the paint booth, setting in the drying oven, increasing oven temperature and after reaching a set temperature were measured at each duct by GC/MS and HPLC. In the paint booth the TVOC concentration repeatedly increased and decreased with the painting of the flat plate and similar compositions of volatile compounds of paint were observed. In the drying oven the TVOC concentration increased and decreased rapidly and formaldehyde and other aldehydes were generated during the drying operation. Formaldehyde, which is carcinogen, exceeded the control standard concentration of 0.1ppm during setting, suggesting proper protection of workers should be conducted to prevent exposure. Ozone and SPM formation potentials and odor concentrations were calculated from VOC component concentrations for each operation and it was suggested that reduction of paint components during painting operations is important to decrease ozone and SPM whereas removal of aldehydes generated during drying operation is necessary to prevent a bad odor.

Keywords

VOCs, Aldehydes, Formaldehyde, Odor

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