Process for producing articles of regenerated chitin-chitosan co

Details Process for producing articles of regenerated chitin-chitosan co Process for producing articles of regenerated chitin-chitosan co

1996-10-15

1998-05-26

Page, Thurman K.

Drug, bio-affecting and body treating compositions

Preparations characterized by special physical form

Wearing apparel, fabric, or cloth

424443, 424445, 424446, 424447, 604289, 604304, A01N 2534, A61L 1516

Patent

active

057561117

ABSTRACT:
The present invention provides fiber materials, knits and textiles, nonwoven fabrics, miscellaneous daily goods or foam materials having an improved dyeability, bio-compatibility, anti-microbial activity, good bio-degradative property, and being effective for deodorizing uses, growth enhancing uses for plants and medical uses, and having anti-microbial effect produced from the chitin-chitosan viscose which is produced by a xanthogenation reaction of alkaline chitin-chitosan having a different DAC ratio through a pre- and post-immersion steps in an NaOH solution, or from a viscose in which chitin-chitosan and cellulose are solubilized. In the process for producing chitin-chitosan/cellulose fibers, films or foam materials from the chitin-chitosan/cellulose viscose, chitin-chitosan in which DAC ratio and degree of polymerization are adjusted is formed through an improved pre-immersion step in which the chitin material is immersed in a NaOH solution of high concentration at high temperature and through an improved post-immersion step in which the temperature is decreased. The chitin-chitosan/cellulose viscose is produced by a xanthogenation reaction with CS.sub.2 and by dissolving in crushed ice. The viscose obtained or a viscose in which chitin-chitosan and cellulose are solubilized in a desired ratio is used for producing fibers or films, and the viscose in which a foaming agent is added is used for producing foam materials. Span-lace process nonwoven fabrics can be also produced from these viscose.

REFERENCES:
patent: 4929722 (1990-05-01), Sartain, III et al.
patent: 4960413 (1990-10-01), Sagar et al.
Chitin, Riccardo A.A. Muzzarelli, Pergamon Press Ltd., New York (1977), pp. 126-129, 228-239.

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