The wood-shaving plates (DSTP) released by the domestic industry with use of carboamidoformaldehyde pitches (KFS) have very essential shortcoming connected with their toxicity because of considerable allocation from them gas, harmful to the person, - formaldehyde. In recent years formaldehyde is recognized as substance, cancerogenic for the person. It concerns different type of plates: from needle (DSTP) and large-size shaving (OSB), fiber boards (DVP), including medium-density DP-SP (or MDF). The Russian Ministry of Health has established very strict requirements on release of formaldehyde in air both in premises, and in free air the admissible level of which (DU and maximum-permissible concentration – maximum concentration limit) makes only 0,01 mg/m3 of air when testing materials by chamber method. The plate materials released now can exceed DU of 17 times stated above. Despite attempts of institute Vniidrev through appeals to relevant authorities of the Ministry of Health to increase such admissible level in our country, generally for plate materials, were not crowned with success yet and this level in real time remains in force. It is possible to use such plates in premises only at very small saturation room void volume plates (the saturation is defined as the relation of surface area of plates indoors to room void volume). In foreign practice of DU of formaldehyde in air much higher and makes 0,124 mg/m3 of air. Results of researches of the maximum saturation (the relation of surface area of plates to room volume) depending on class of emission of DSTP and DU formaldehyde at values 0,01 and 0,124 of mg/m3 of air in relation to premises are given in the real work.
wood-shaving plates formaldehyde, admissible level of formaldehyde in air, the maximum saturation premises plates
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