Improvements in and relating to the manufacture and production of threads, filaments, bands, and the like, from viscose

Abstract

Abstract 253,953. Courtaulds. Ltd., Napper, S. S., and Gardner, H. D. Sept. 17, 1924. Cellulose xanthate, processes for making filaments from.-Hollow threads. filaments, bands, &c. are made by projecting into an acid bath con. taining a zinc salt in solution a viscose containing either a fluid in suspension or emulsion, which in the bath will give rise to a gas, or alternatively a substance such as sodium carbonate, which in the bath will give rise by chemical action to bubbles within the filaments &c. In examples, a viscose to which sodium carbonate has been added either during its preparation or subsequently thereto. or which contains an excess of carbon disulphide, is projected into a bath containing sulphuric acid, zinc sulphate, sodium sulphate, and glucose; the sodium sulphate may be replaced by ammonium, magnesium, iron, aluminium, or chromium sulphate, or mixtures of these Specifications 8700/92. 20801/00, [both in Class 2, Acids and salts, Organic &c.], 7748/10, 15752/10, 406/11, 24291/14, 143,253, and 189,973 are referred to.

Inventors

No inventors recorded.

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