D - Textiles – Paper – 21 – B
Patent
D - Textiles, Paper
21
B
92/52
D21B 1/04 (2006.01) D21B 1/12 (2006.01)
Patent
CA 1045866
IMPROVING THE BONDING PROPERTIES OF MECHANICAL PULPS ABSTRACT OF DISCLOSURE Process of producing a mechanical pulp of improved lint- ing properties by fractionating the mechanical pulp by means of a hydrocyclone into at least two fractions one fraction having an average specific surface less than a predetermined value between 1.2 and 4 m2/g and the second fraction having an average specific surface greater than the first fraction and subjecting the first fraction to mechanical processing thereby to form a processed fraction having an average spe- cific surface at least 2 m2/g larger than the initial average specific surface of said first fraction and recombi- ning said process fraction and said second fraction into a combined pulp. The invention also relates to a method of determining specific surface distribution of fibres of the mechanical pulp by fractionating the pulp in a hydrocyclone system into a plurality of underflow fractions and a plurality of overflow fractions each of said underflow and overflow fractions containing a different portion of fibres of said sample and analysing each of said underflow fractions or of said overflow fractions or both to determine the specific surface of each of said selected underflow or overflow fractions.
267370
Karnis Alkibiadis
Wood John R.
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