FIELD: chemistry.
SUBSTANCE: group of inventions relates to extruded composite material, method for production and use thereof. Composite material contains wood fibre material and polymer. Wood fibre material is wood core material, in which content of knots or branches is at least 20 wt%, or birch bark, or wood material impregnated with an extract, obtained by extraction of knots, branches or bark. Polymer content is 5-25 % of weight of composite material. Wood core material is material derived from pine. Polymer is a polyalkylene or biopolymer. Solid composite material is obtained by mixing wood fibre material and polymer and extrusion of mixture. Composite material is used as construction, decorative, packing, transportation or furniture material.
EFFECT: higher hardness, low moisture absorption and swelling capacity.
5 cl, 5 tbl
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