Fibre manufacture

摘要

The shape of elongate lyocell members such as fibres can be modified by applying a transverse deforming force to the member while it is in plasticised never-dried state. Possible modifications of this kind include the induction of crimp and the alteration of fibre cross section from the circular. Suitable plasticisers include aqueous sodium hydroxide and aqueous tertiary amine N-oxides. The deforming force may be applied, for example, by passage of the elongate member through a constriction or over an edge or by impacting a fluid stream thereagainst.