Method of making mechanical pulp
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United States of America Patent
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Dec 6, 1988
Grant Date -
N/A
app pub date -
May 28, 1987
filing date -
Nov 6, 1985
priority date (Note) -
Expired
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Abstract
A method for producing mechanical pulps which are useful for producing coated light weight paper, magazine paper and the like, is disclosed, which includes preheating lignocellulose-containing material in the presence of impregnation chemicals, refining the preheated lignocellulose-containing material utiilizing a pair of counter-rotating refining discs under pressure, bleaching the thus produced partially refined lignocellulose-containing material, and refining the bleached material in a second refining step utilizing a pair of refining discs, one of which is stationary and the other which is rotating under pressure.
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