Paper making and fiber liberation – Processes of chemical liberation – recovery or purification... – With non-fiber material added to product
Patent
1979-07-26
1984-06-12
Smith, William F.
Paper making and fiber liberation
Processes of chemical liberation, recovery or purification...
With non-fiber material added to product
162 78, 162 79, 162 81, 1621812, 162207, D21H 366
Patent
active
044540051
ABSTRACT:
Defiberized lignocellulosic material, such as wood, is treated with a liquid carrier containing an oxidizing agent (a per compound, a chlorate or a nitrate), and the wet mat thereof is subjected to pressure, and to heat for a sufficient period of time to cause an oxidative reaction among the fibers resulting in a strong interfiber bond. Where the oxidizing agent is a per compound, the pH of the mixture or lignocellulosic material and per compound is less than 7. Catalysts or other reaction modifying agents are employed if needed. By virtue of the enhanced interfiber bonding effect, paper sheets, such as liner board, which are usually formed of delignified cellulosic material, the fibers of which are highly refined, can be formed totally or partially of less expensive sources of material such as ground wood, semi-chemical or semi-mechanical lignocellulosic pulps without sacrifice of strength.
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Stofko Jan
Zavarin Eugene
Gregg Edward B.
Smith William F.
The Regents of the University of California
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