Textiles: spinning – twisting – and twining – Strand structure – Multifilament yarns
Patent
1982-04-12
1984-12-11
Watkins, Donald
Textiles: spinning, twisting, and twining
Strand structure
Multifilament yarns
57248, 57284, D02G 302, D02G 102
Patent
active
044870116
ABSTRACT:
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 65.times.10.sup.-3 are simultaneously drawn and false twist texturized without a reduction of the twist number but at temperatures which are no more than 30.degree. 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.
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Heichlinger Norbert
Heinrich Karl
Hoechst Aktiengesellschaft
Watkins Donald
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