Paper making and fiber liberation – Processes of chemical liberation – recovery or purification... – With chemical or physical modification of liberated fiber
Patent
1994-05-27
1996-06-04
Chin, Peter
Paper making and fiber liberation
Processes of chemical liberation, recovery or purification...
With chemical or physical modification of liberated fiber
162146, 1621576, 81161, D21H 1120
Patent
active
055229670
ABSTRACT:
Disclosed is a method for the surface modification of cellulose fiber and the resulting product, sulfonated cellulose. Cellulose is first oxidized, preferably with sodium metaperiodate (NaIO.sub.4), to form dialdehyde oxycellulose, which is then reacted with sodium bisulfite (NaHSO.sub.3) to produce sulfonated cellulose. Sulfonation of the cellulose fiber significantly increases the dry and wet tensile strength as well as the wet strength:dry strength ratio, making this modified cellulose fiber extremely useful in a wide variety of paper products requiring a combination of good strength in both wet and dry applications.
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Chin Peter
Croft Gregory E.
Kimberly-Clark Corporation
Schenian John R.
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