Process for treating pulpwoods and pulps with a pitch degrading

Details Process for treating pulpwoods and pulps with a pitch degrading Process for treating pulpwoods and pulps with a pitch degrading

1995-06-05

1998-12-29

Alvo, Steven

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

Treatment with particular chemical

435277, 435278, 435911, 162DIG3, C12N 114, D21H 2502

Patent

active

058535373

ABSTRACT:
Wood-penetrating fungi of the classes Ascomycotina and Deuteromycotina may be used very effectively to degrade pitch in wood forms used in the making of cellulosic products. Such fungi include but are not limited to the blue stain fungi. The process of Ascospore selection may be used to provide fungi which exhibit good growth on wood substrate while having little or no effects on substrate brightness, or even a positive effect on brightness. The treatment positively influences strength properties of ultimate products such as paper. In one embodiment the pulpwood or pulp is treated with a pitch degrading fungus of the genus Ophiostoma.

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