Textured polyester multifilament yarn

Abstract

Textured polyester multifilament yarns usable for producing knitted or woven fabrics having a desirable dyeing property but no objectionable appearance of local glitter, are prepared, with high efficiency, by simultaneously drawing and false-twist texturing an undrawn polyester multifilament feed yarn composed of a plurality of polyester filaments each having a multilobal cross-sectional profile having 5 to 10 lobes projected radially with substantially equal angular intervals therebetween about the center of the filament, the cross-sectional profile satisfying the relationship (1) 1.05 .ltoreq. R.sub.1 /R.sub.0 .ltoreq. 1.16 (1) wherein R.sub.0 is the radius of an imaginary circle inscribed within the cross-section around the center of the filament and R.sub.1 is the radius of another imaginary circle circumscribed about the tips of at least half the total number of the lobes, around the center of the filament.

Dependencies are inferred from the claim text.