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Studies in Viscose Rayon Dyeing: Applications of the Dyeometer
Author(s) -
Royer G. L.,
McCleary H. R.,
Bruyne J. M. A. De
Publication year - 1947
Publication title -
journal of the society of dyers and colourists
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.297
H-Index - 49
eISSN - 1478-4408
pISSN - 0037-9859
DOI - 10.1111/j.1478-4408.1947.tb02476.x
Subject(s) - dyeing , viscose , materials science , pulp and paper industry , polymer chemistry , composite material , chemistry , chemical engineering , engineering
A quantitative study has been made of viscose rayon dyeing as affected by (1) rayon manufacturing variations and (2) variations in dyeing conditions. A new instrument called the Dyeometer was used to obtain the dyeing data; this instrument is useful for making accurate measurements of exhaustion at all stages of a dyeing. From the data for the early portion of dyeing, the quantity “initial dyeing rate” has been calculated. This value has been introduced to provide a numerical basis for a quantitative comparison of dyeing rates. The percentage equilibrium exhaustion, the time necessary to reach 90% of equilibrium exhaustion, and the initial dyeing rate have been used to characterise dyeing Curves. The rayon manufacturing variations studied were— filament size, godet stretch, viscose age, skin structure, degree of polymerisation, delustrant, and presence of gas bubbles in the filaments. The dyeing conditions studied were— salt concentration, type of salt, yarn weight, temperature, and dye concentration. The results of these studies have been discussed and some of the practical aspects related to rayon dyeing have been pointed out.