US 12,252,815 B2
Cut resistant ply-twisted yarns and fabrics made thereof
Yingxiang Hu, Shanghai (CN)
Assigned to DUPONT SAFETY & CONSTRUCTION, INC., Wilmington, DE (US)
Filed by DUPONT SAFETY & CONSTRUCTION, INC., Wilmington, DE (US)
Filed on Sep. 1, 2020, as Appl. No. 17/009,385.
Claims priority of application No. 201910841636.1 (CN), filed on Sep. 6, 2019.
Prior Publication US 2021/0071323 A1, Mar. 11, 2021
Int. Cl. D02G 3/44 (2006.01); A41D 19/015 (2006.01); A41D 31/24 (2019.01); D02G 3/04 (2006.01); D02G 3/12 (2006.01); D02G 3/36 (2006.01); D04B 1/28 (2006.01); D04B 21/20 (2006.01)
CPC D02G 3/442 (2013.01) [A41D 19/01505 (2013.01); D02G 3/047 (2013.01); D02G 3/12 (2013.01); D02G 3/36 (2013.01); A41D 31/24 (2019.02); A41D 2500/10 (2013.01); D04B 1/28 (2013.01); D04B 21/207 (2013.01); D10B 2101/20 (2013.01); D10B 2331/021 (2013.01); D10B 2331/10 (2013.01); D10B 2501/041 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A multi-ply twisted yarn for a cut-resistant fabric, characterized in that the yarn comprises:
(i) at least a first single yarn having a skin-core structure, wherein the skin comprises aromatic polyamide staple fibers and the core comprises tungsten filaments, and
(ii) at least a second single yarn having a skin-core structure, wherein the skin comprises cut-resistant staple fibers, the core comprises at least an elastomer filament, and
the cut-resistant staple fibers of the second single yarn are selected from one or more of aromatic polyamide staple fibers, aliphatic polyamide staple fibers and polyethylene staple fibers,
wherein the tungsten filaments have a diameter of 25 μm to 35 μm; and
wherein a fabric having a basis weight of 214 to 313 g/m2 knitted from said multi-ply twisted yarn has a cutting force index of 16.94 N/g/m2 or greater, and a cut level that is higher than or equal to ANSI/ISEA 105 level A6.