перфоратор для формальдегида

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In Europe, the perforator method (EN 120) is the mostly used laboratory method of the wood-based panel industry. Usually, the measured perforator value depends on the moisture content of the boards. According to DIBt-100, the measured perforator values are corrected to a common moisture content (MC) of 6.5% using an established equation proposed by Jann and Deppe (1990). The correction factor of Jann and Deppe (1990) is based on the assumption that particle- and fibreboards change their perforator values to the same extent regardless whether increasing or decreasing the moisture content in the range of 3ВPв TВPuВPв TВP9%. Application of this correction factor to particle- and fibreboards of higher moisture content than 6.5% can lead to biased corrected results in favour of low emission. The corrected values can also lead to paradoxical relation between the perforator values and emission in the low-emission region.

Georg-August-UniversitГTt GГfttingen, ВPCasco Adhesives AB

IssueВP 3DOI:ВP10.1007/s00226-010-0355-1Published:ВP2010-07-16Institution(s):ВP

Roffael, E.; ВPJohnsson, B.; ВPEngstrГfm, B.Journal:ВPWood Science and TechnologyВP

Nevertheless, the emission rises with increasing perforator value

against the emission of the boards in the 1ВPmВ chamber.

and corrected perforator values of low-emission boards are plotted

factor can be derived from Figs.ВP10 and 11, where the measured

Undisputed hard evidence of the shortcoming of the correction

Correlation between the measured perforator value and formaldehyde emission in the 1ВPmВ chamber (Roffael 2004)

SpringerImages - Correlation between the measured perforator value and formaldehyde emission in the 1ВPmВ chamber (Roffael 2004)