FIELD: textile industry.
SUBSTANCE: wood mass is deaerated. For this purpose it is steamed at the temperature of 80-100°C for removal of air from wood chips. Then steamed chips are impregnated with alkaline impregnating solution. At the same time at the stage of impregnation temperature of impregnating solution is maintained below temperature of steaming. Under these conditions alkali penetrates into wood chips. Produced mass of wood chips is ground down to desired freeness. Impregnation is carried out at excessive pressure.
EFFECT: reduced amount of alkali used for impregnation, increased light scattering of mass without increase in content of non-ground fibres and increased specific volume of mass.
14 cl, 1 dwg, 4 tbl, 2 ex
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