US 12,258,686 B1
Heather spun yarns and fabrics, and methods for producing the same
Paul Urban Geiwald, Encinitas, CA (US); Lean Teik Heng, Shanghai (CN); and Yu Chung Lo, San Diego, CA (US)
Assigned to Winds Enterprises Limited, Hong Kong (HK)
Filed by Winds Enterprises Limited, Hong Kong (HK)
Filed on Mar. 2, 2022, as Appl. No. 17/684,706.
Application 17/684,706 is a continuation of application No. 15/965,107, filed on Apr. 27, 2018, abandoned.
Claims priority of provisional application 62/491,154, filed on Apr. 27, 2017.
Int. Cl. D02G 3/34 (2006.01); D02G 3/02 (2006.01); D04B 1/12 (2006.01); D04B 1/16 (2006.01); D04B 21/08 (2006.01); D04B 21/16 (2006.01); D04B 21/20 (2006.01); D06P 3/52 (2006.01); A41B 1/08 (2006.01); A41D 31/00 (2019.01)
CPC D02G 3/346 (2013.01) [D02G 3/02 (2013.01); D04B 1/126 (2013.01); D04B 1/16 (2013.01); D04B 21/08 (2013.01); D04B 21/16 (2013.01); D04B 21/207 (2013.01); D06P 3/52 (2013.01); A41B 1/08 (2013.01); A41D 31/00 (2013.01); A41D 2500/10 (2013.01); D10B 2331/04 (2013.01); D10B 2501/04 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A substantially bleed-free spun heather yarn, comprising:
first pre-colored staple fibers comprising first polyester fibers dyed with a first cationic dyestuff, the first polyester fibers having at least 2.3% SO3− content by weight and having a first color, and
second pre-colored staple fibers comprising second polyester fibers dyed with a second cationic dyestuff, the second polyester fibers having at least 2.3% SO3− content by weight and having a second color different from the first color,
the first and second pre-colored staple fibers being spun together to form the spun heather yarn, and the spun heather yarn achieves grade 4.5 or better in one or more of color fastness to dry heat, color fastness to washing, and color fastness to dye transfer.