Gear crimped jaspe yarns and processes for their manufacture

Details Gear crimped jaspe yarns and processes for their manufacture Gear crimped jaspe yarns and processes for their manufacture

D - Textiles, Paper

02

G

28/41

D02G 1/14 (2006.01)

Patent

CA 1157637

14 ABSTRACT There is provided a drawn gear-criped yarn with latent bulk, the yarn being a nodally interlaced composite yarn comprising polyester continuous filaments and polyamide continuous filaments in the weight ratio 90:10 to 10:90 and the amount and nature of the bulk and the interlacing being such a that the composite yarn has an initial crimp as defined of 2% to 12%, a mechanical crimp stability as defined of above 0% and has 40 to 140 nodes per metre. The gear-crimped yarn may be produced by heating a drawable polyester yarn (1) having birefringence of at least 30 x 10-3 and drawable polyamide yarn (4) having a bire- fringence of at least 30 x 10-3, simultaneously drawing and gear-crimping the composite yarn by means of toothed draw rolls (11,12), forwarding the crimped composite yarn from the toothed draw rolls under a controlled tension within the range 0.15 to 0.50 g per decitex based on the decitex of the drawn composite yarn and subsequently nodally interlacing (18) the composite yarn such that it has 40 to 140 nodes per metre, the weight ratio of the polyester yarn to the polyamide yarn being in the range 90:10 to 10:90.

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