Self crimping yarn

Details Self crimping yarn Self crimping yarn

D - Textiles, Paper

01

D

18/616

D01D 5/253 (2006.01) D01D 5/23 (2006.01)

Patent

CA 1118172

ABSTRACT This invention provides improvements in a process of forming self-crimping yarns to increase the crimping effect of the yarns. The process involves melt spinning by the steps of first extruding a molten polymer stream along its axis into a cooling zone. The molten stream comprises a first fin-like portion having a first side and an opposite side, the first side having a given width exposed to a quenching medium in the cooling zone, a second portion connected to an intermediate region of the opposite side and shielded from said quenching medium and having a width smaller than the given width and the thickness of the stream including the combined thicknesses of the first and the second portions in a direction normal to the given width being less than 70% of the given width. The stream is solidified into a filament withdrawn at a given spinning speed and the filament collected.

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