Method of paper making using an abrasive refiner for refining bl

Details Method of paper making using an abrasive refiner for refining bl Method of paper making using an abrasive refiner for refining bl

1989-01-12

1990-10-30

Alvo, Steve

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

With plural or specified mechanical defibering step

162 25, 241 28, D21C 102, D21C 900

Patent

active

049666517

ABSTRACT:
An improved paper for printing and other uses can be made from a paper pulp that contains pulp derived from hardwoods if the pulp is refined in a refiner that has at least one abrasive surface disk. The pulp can be refined to give a vessel picks count of 2/cm.sup.2 or less and have a Freeness of less than that which can be achieved using a refiner having conventional barred disks.

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Miles et al., "Abrasive-Filled Refiner Plates in Thermomechanical Pulping", paper presented at 74th Annual meeting of the Technical Section, Canada Pulp & Paper Assoc., Montreal, Canada, Jun. 26-29, 1988.
Stationwala, M. I., "Abrasive Refiner Plates for the Production of Mechanical Pulp"; Tappi Pulping Conf., Toronto, pp. 237-241; Oct. 1986.

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