FIELD: paper-and-pulp industry.
SUBSTANCE: waste paper mass is treated for 3-5 min in hydraulic breaker with reposing rotor by following chemicals: sodium hydroxide, sodium silicate, sunflock, and starch. Then, mass is pulped with working rotor for 35-40 min. At the end, hydrogen peroxide is added to bath.
EFFECT: increased absorbing capacity of sanitary-hygienic paper and reduced cost price.
1 dwg
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