Faster Measurement for Formaldehyde Emissions from Veneered Particleboard Based on the Standardized Desiccator Method
2022
Jijuan Zhang | Zhaozhen Gui | Yang Chen | Li Xue | Feifei Song | Zhongfeng Zhang
Desiccator method is a fast and effective way to measure formaldehyde emissions from wood-based panels. This method is popular in the Chinese furniture industry and testing institutions. It is also an important method for production control due to its characteristics of low cost, fast speed, and simple operation. In order to further increase the measurement speed of the desiccator method, this study focuses on the impact of temperature and time conditions in regard to standard GB/T 17657-2013. The corresponding relationships for the measurement of formaldehyde emissions between the standardized desiccator method and those under different temperature and time conditions were studied. Four different experimental conditions were used: 60 °:C for 6 h, 40 °:C for 6 h, 43 °:C for 4 h, and 45 °:C for 4 h. The results showed that under 40 °:C for 6 h the formaldehyde emissions measured using desiccator method were about twice as much as those under 20 °:C for 24 h, at a correlation coefficient of R = 0.820. Under 45 °:C for 4 h, the formaldehyde emissions measured using desiccator method were almost near equilibrium to emissions under 20 °:C for 24 h, which was supported by a correlation coefficient of R = 0.955. A corresponding relationship between the formaldehyde emissions measurement results under these two conditions and those under the standardized conditions was observed. This relationship can be applied in the actual production control in the furniture industry in order to shorten the formaldehyde measurement time from 24 h to 6 h and 4 h, which can greatly improve measurement efficiency.
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