Problemy toksykologiczne stosowania formaldehydu w produkcji materialow termoizolacyjnych. Cz.I. Emisja formaldehydu z plyt termoizolacyjnych

Określono emisję formaldehydu z kilku rodzajów płyt wykonanych z wełny mineralnej. Zbadano wpływ procesu starzenia na uwalnianie tego związku. Stwierdzono, że emisja formaldehydu zależy od gęstości i grubości płyt oraz czasu ich przechowywania.

The purpose of the experiment has been to analyse the release of formaldehyde from thermoinsulating boards used in building construction. The research included also the effect of thermoinsulating boards ageing on formaldehyde release to the environment. The measurements under controlled conditions of temperature and relative air humidity were performed in a 0.6 m3 air conditioning chamber according to Polish Standard PN-89-Z-04021/02. It has been found that average release of formaldehyde from 30% of boards exceeded the 0.05 mg/m3 hygienic standard adopted for indoor air in Poland. The density and the thickness of the boards affect the release rate. During ageing of the materials, a gradual decrease of formaldehyde release was observed (after 14 months the release level was 13% ÷ 21% of the initial value).