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Bisulphite Setting of Woollen–spun Carpet Yarns
Author(s) -
Forbes E. A.,
Dittrich JH.
Publication year - 1980
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.1478-4408.1980.tb03493.x
Subject(s) - autoclave , yarn , materials science , abrasion (mechanical) , composite material , dwell time , pulp and paper industry , bar (unit) , metallurgy , engineering , medicine , clinical psychology , physics , meteorology
The twist in carpet yarns of suitable construction can be adequately set by a continuous treatment with sodium bisulphite in a tape–scouring machine. Different levels of set can be produced by varying the conditions: increasing the bisulphite concentration, the pH of the solution, the dwell time, and the bath temperature all improve the set. Improvements in the colour of the yarn and changes in pH are produced. While the yarn strength and extensibility decrease, the changes are comparable with those produced by the autoclave and water–setting treatments examined. Adverse changes in carpet abrasion resistance may occur when concentrations in excess of 10g/l are used. Bisulphite setting has been found to be more suitable for yarns to be jet–printed than setting in an autoclave or by hot water.