Variable denier filaments and method of producing same
AssigneeBASF SE
InventorsWayne S. Stanko, Stuart H. Rice
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Abstract
This invention pertains to variable denier filaments prepared from synthetic polymers having a glass transition temperature of at least 30.degree. C. and yarns made therefrom. The filaments have longer length slubs, which results in their use in fabrics desiring a variable texture and dyeing effects. The filaments are prepared by drawing at ambient temperature a feeder yarn having sufficient molecular orientation at carefully controlled draw ratios and in draw zones having a specified length.
Claims21
A variable denier filament comprised of a synthetic polymer having a glass transition temperature of at least 30.degree. C., said filament having thick and thin sections along its longitudinal axis and said sections have a length in the range of from about 1.4 to about 30.9 inches, an average slub length of from about 9.1 to about 16.2 inches, and said sections occupy from about 16.4 to about 49.8% of said longitudinal axis of the filament.
A method of preparing a yarn containing variable denier filaments comprised of a synthetic polymer having a glass transition temperature of at least 30.degree. C. comprising drawing at ambient temperature a feeder yarn having a birefringence in the range of from about 0.01 to about 0.05 at a draw ratio in the range of from about 1.27 to about 2.03 and in a draw zone having a length of from about 15.2 to about 300 centimeters.
Dependencies are inferred from the claim text.