Bleaching and dyeing; fluid treatment and chemical modification – Chemical modification of textiles or fibers or products thereof – Cellulose fibers
Patent
1991-09-12
1994-06-21
Johnson, Jerry D.
Bleaching and dyeing; fluid treatment and chemical modification
Chemical modification of textiles or fibers or products thereof
Cellulose fibers
811551, 162102, D06M 1100, D06M 1300, D06M 2300, D21H 1100
Patent
active
053225244
ABSTRACT:
Novel cellulosic fiber with improved resistance to abrasion and increased permeability to chemicals characterized by highly stable crystalline cellulose III and cellulose IV forms is disclosed. Cellulose selected from either fiber, yarn, fabric, cotton, or mercerized cotton is treated with ammonia vapors at from about ambient to 140.degree. C. and from about 100 psi to 1700 psi for sufficient time to alter the interatomic planar distances and produce stable crystalline cellulose III polymorph. Crystalline cellulose III can also be immersed in ethylenediamine and then boiled in dimethylformamide to completely convert the III to cellulose IV.
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Benerito Ruth R.
Calamari, Jr. Timothy A.
Yatsu Lawrence Y.
Fado John D.
Johnson Jerry D.
Silverstein M. Howard
The United States of America as represented by the Secretary of
Von Bodungen Raymond C.
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