Feed yarn and process for the manufacture of a voluminous false twist texturized hairy yarn
AssigneeHoechst Aktiengesellschaft
InventorsGunther Bauer, Wolfgang Burghardt, Hilmar Moller
Life of this patent
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Abstract
Multifilament feed yarns in drawable state made from fiber-forming polyester are provided which in accordance with the invention can be processed in a combined draw and false twist process to voluminous filament yarns having individual protruding filament ends. The feed yarns must consist at least in part of filaments having a flex abrasion resistance of less than 1500 cycles and a crack index of more than 5. By using suitable spin finishes, the crack index can be varied and thus the hairiness of the voluminous filament yarns manufactured can be adjusted independently from the crimp values and the pilling behavior.
Claims7
A feed yarn for the manufacture of a synthetic voluminous filament yarn having individual protruding filament ends by means of drawing and false twist texturizing equipment, comprising undrawn, preferably however preorientated filaments of fiber-forming polyester, part of said filaments at least have a flex abrasion resistance of less than 1500 cycles, and at least part of the filaments having a flex abrasion resistance of less than 1500 cycles having a crack index of more than 5.
A process for the manufacture of a voluminous filament yarn having individual protruding filament ends comprising the drawing and false twist texturizing of a drawable polyester feed yarn in which feed yarn part at least of the filaments have a flex abrasion resistance of less than 1500 cycles, wherein at least part of the filaments of the yarn, due to the use of a special finish, have a crack index of more than 5.
Dependencies are inferred from the claim text.