	US 12,392,058 B1
	Heather filament 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, China Hong Kong (HK)
Filed by Winds Enterprises Limited, China Hong Kong (HK)
Filed on Mar. 2, 2022, as Appl. No. 17/684,974.
Application 17/684,974 is a continuation of application No. 15/965,073, filed on Apr. 27, 2018, abandoned.
Claims priority of provisional application 62/491,153, filed on Apr. 27, 2017.
Int. Cl. D02G 3/34 (2006.01); D02G 1/02 (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); A41D 31/00 (2019.01)

CPC D02G 3/346 (2013.01) [D02G 1/0286 (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); A41D 31/00 (2013.01); A41D 2500/10 (2013.01); D10B 2331/04 (2013.01); D10B 2501/04 (2013.01)]

21 Claims

1. A heather filament yarn, comprising:

first pre-colored filaments comprising first precursor polyester filaments dyed with a first cationic dyestuff having a first color, the first precursor polyester filaments having at least 2.3% SO₃⁻content by weight, and

second pre-colored filaments comprising second precursor polyester filaments separately dyed with a second cationic dyestuff having a second color that is different from the first color, the second precursor polyester filaments having at least 2.3% SO₃⁻content by weight,

the first and second pre-colored filaments being twisted together to form the heather filament yarn, wherein the first and second pre-colored filaments generally do not sublime when the heather filament yarn is subjected to temperatures ranging between 300 degrees and 340 degrees Fahrenheit, and the heather filament 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.