FIELD: paper-and-pulp industry.
SUBSTANCE: process of invention is intended for use in paper-and-pulp industry, e.g. in manufacture if paper and cardboard, and is implemented as follows. Jute fibers are impregnated for 5-15 min with alkali solution containing NaOH and Na2CO3 (1:1) at common N2O consumption 2-4% based on the weight of absolutely dry raw material at temperature 90-120°C. Treated raw material in hot state is transferred together with reagent solution into heated grinding barrels of centrifugal grinding apparatus and ground therein to grinding degree ˜60 degrees of Shopper-Riegler.
EFFECT: increased yield and mechanical strength of intermediate product and reduced environmental pollution.
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