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Expired
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GB1284932A
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Individual
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Individual
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Priority to GB1284932ApriorityCriticalpatent/GB394793A/en
Publication of GB394793ApublicationCriticalpatent/GB394793A/en
To avoid the necessity for sizing and to permit of the employment of the usual twisting-machines, viscose artifical silk, previous to the hard twisting necessary for creping, is subjected to a shrinking by treatment with a swelling agent so that the breaking elongation is increased, or the process of manufacture is conducted so as to produce a thread of similarly high elongation by avoiding tension during the spinning operation, that is, by reducing the speed of winding relatively to the speed of extrusion and by avoiding bending at guides during the travel of the thread. For the shrinking a solution of caustic soda may be employed, and to this may be added sodium sulphide to effect desulphurization at the same time. The shrinking may be carried out either on the hank, on the cake, or any form not liable to tension when drying. Specification 393,712 is referred to.
GB1284932A1932-05-041932-05-04Improvements in the treatment of artificial silks
ExpiredGB394793A
(en)