PROCESS FOR THE CONTINUOUS PRODUCTION OF VISCOSE RAYON YARNS HAVING HIGH DEGREE OF WHITE

Continuous prodn. of viscose rayon yarns comprises extruding viscose soln. into a coagulating bath, drawing and coagulating the filaments in the bath, and then finish-trea-ting the filaments while they mive in an almost helical path. The improvement comprises further coagulating the filaments after...

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Bibliographic Details
Main Authors LEONCINT NOVELLO, PAOLETTI UGO, PALLESI BICE, ANGELINT GIANFRANCO
Format Patent
LanguageEnglish
Korean
Published 12.10.1984
Subjects
APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBONFILAMENTS
CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS,THREADS, FIBRES, BRISTLES OR RIBBONS
NATURAL OR ARTIFICIAL THREADS OR FIBRES
SPINNING
TEXTILES
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Summary:Continuous prodn. of viscose rayon yarns comprises extruding viscose soln. into a coagulating bath, drawing and coagulating the filaments in the bath, and then finish-trea-ting the filaments while they mive in an almost helical path. The improvement comprises further coagulating the filaments after they are withdrawn from the first coagulating bath, until a coagulation index of not higher than 1 is reached. These obtd. filaments are treated with water having a Ph of 4.0-5.5, a Ca(2+) ion content of not higher than 1.0mg/l. The treatment is continued until the final yarn contains (max.values) 0.2% total sulfur, 40 ppm iron, 700 ppm Zinc, and 30 ppm lead.
Bibliography:Application Number: KR19810002479