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The Rotproofing of Viscose Rayon IndashTreatment of Viscose Rayon with Formaldehyde, and Formaldehyde‐containing Resins
Author(s) -
Bell J. W.,
Ramsey Mabgaret M.,
Whewell C. S.
Publication year - 1955
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.1478-4408.1955.tb02062.x
Subject(s) - viscose , formaldehyde , phenol , chemistry , urea , textile , pulp and paper industry , materials science , composite material , organic chemistry , engineering
Viscose rayon yam is treated with formaldehyde and a number of formaldehyde‐containing resins in an attempt to obtain a rotproof finish. The most outstanding result which emerges from the experiments is that halogenated phenoplasts are more efficient than either urea‐formaldehyde or phenol‐formaldehyde, and that a resin prepared from bromophenol and formaldehyde is exceedingly effective, a deposit of only 5% on the yarn being resistant to microorganisms under the most severe and prolonged test conditions. It also appears possible to improve the efficiency of urea‐formaldehyde resin by incorporating a small proportion of halogenated resin. Urea‐formaldehyde resin by itself is effective only if present in prohibitively high concentrations; below 15–20% the proof breaks down on prolonged testing. Formaldehyde alone is moderately effective, and appears to have little effect on the wet tensile strength of the viscose rayon; it may be of value where conditions highly favourable to the growth of microorganisms are not likely to be encountered. The experiments have shown that laboratory assessment of rotproofing should be carried out by more than one method; a treatment which confers a measure of resistance to microorganisms under one set of test conditions may be much less effective when tested by a different procedure. This confirms the findings of many other workers.