Thermowood and granularity of abrasive wood dust

Abstract

The granular composition of the abrasive dust of heat-treated wood from spruce and oak depending on the treatment at the temperature of 160 °C, 180 °C, 200 °C and 220 °C is presented in the paper. The proportion of dust fractions with a dimension of ≤ 0.08 mm was determined by a sieve analysis. The percentage of these proportions is similar for natural wood and wood treated at the temperature of 160 °C, 180 °C and 200 °C. Significantly lower proportion of dust fractions with dimensions of ≤ 0.08 mm occurred at a temperature of 220 °C in all examined samples. The fact that the main factor causing the drop of the dust fraction with a dimension of ≤ 0.08 mm at 220 °C is the reduction in wood density is assumed.