NEW MANUFACTURING TECHNIQUE OF HEAT INSULATING WOOD FOAM WITHOUT PLASTICS

The paper is a contribution of authors to the knowledge enrichment on the recent development of the new manufacturing technique of wood foam for packaging excluding plastics in its preparation mixture. Given that there is only one industrial manufacturer in the world of this type of wood foam with excellent heat-insulating properties, the current work presents an original method of its production using raw materials different from those applied in the industrial manufacturing recipe. Oak and beech wood waste, bentonite clay as a nanomaterial, calcium lignosulfonate as a surfactant, and distilled water were materials chosen by authors. The features of the new optimal product were density of 0.06 g·cm-3, heat conductivity of 0.027 W·m-1·K-1, porosity of 94.1 %, and compression strength of 985 kPa, being approximately similar by comparison with industrial products.