PREPARING CELLULOSE MICROFILAMENTS AND MICROFIBRES

摘要

The invention concerns a method for preparing cellulose microfilaments, consisting in: preparing a cellulose solution (C); extruding the latter through the hole(s) of a die (1); said die (1) hole(s) having such diameter that in the absence of drawing the said solution (C) passing through said die hole(s) produces filaments with a yarn count T0 not more than 2.5 dtex; hydraulically drawing, at the outlet of said hole(s), said extruded solution; said drawing being carried out with a liquid (F) capable of regenerating or precipitating, at least partially, said cellulose. The invention also concerns the preparation of microfibres from the resulting microfilaments. The invention enables the preparation of highly hydrophilic cellulose microfilaments and microfibres (with yarn count less than 0.7 dtex) and also, directly and continuously, microfilament and microfibre nonwoven fabrics.