Process for making bulky textured multifilament yarn
AssigneeToray Industries, Inc.
InventorsTakao Negishi, Kazuo Tomiita
Life of this patent
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Abstract
A bulky textured multifilament yarn comprises sections of interlaced individual filaments and sections of non-interlaced individual filaments, wherein the interlaced and non-interlaced sections are formed alternately along the lengthwise direction of the yarn, the filaments in any predetermined length of the yarn are substantially identical in length, and some portions of the individual filaments protrude out from the axis of the yarn. The yarn is made by slackening a multifilament yarn treated by a false twisting operation, and then by interlacing the slackened multifilament yarn by means of a fluid jet stream while taking up the multifilament yarn.
Claims9
A process for manufacturing a bulky textured multifilament yarn composed of a plurality of individual filaments having false-twisted crimps, having interlaced yarn sections and non-interlaced yarn sections formed alternately along the longitudinal axis of the yarn, and having a plurality of filament portions protruding from the yarn axis, said process comprising at least two steps:
- slackening a multifilament yarn treated by a false twisting operation to such an extent that crimps of individual filaments are formed;
- the crimps of each of said filaments being irregularly distributed along its length as compared to the crimp distribution of other filaments of said yarn;
- then interlacing said individual filaments of said slackened multifilament yarn by a fluid jet stream while taking up said multifilament yarn, whereby crimps of said individual filaments created by said flase twisting operations are maintained in said yarn during said slackening and interlacing treatment of said yarn.
Dependencies are inferred from the claim text.