Process for making a texturized profile yarn, and the resulting yarns

摘要

The invention relates to a process for making texturized multifilament yarns having profiled polyester filaments, by means of draw false twist texturizing, wherein feed yarns which are multifilament yarns having a high pre-orientation which corresponds to a birefringence of more than 65x10-3 are simultaneously drawn and false twist texturized without a reduction of the twist number but at temperatures which are no more than 30 DEG C. above the glass transition temperature (second order transition temperature) of the polymer and to the resulting luster yarns, the cross-section profiles of which are largely retained in this special texturizing process.