Elastic fiber, composite yarns and fabrics with anti-slippage performance

Abstract

Elastic fiber with improved seam slippage resistance performance is provided. Also provided are elastic composite yarn, fabrics and articles of manufacture comprising the elastic fiber and methods for production of methods for making spandex fiber, composite yarn, fabric and articles of manufacture with improved elastane slippage resistance.

1 . An elastomeric fiber with reduced elastane slippage, said fiber comprising an elastomer and at least one anti-slip polymeric additive having a glass transition temperature below 100° C. 
     
     
         2 . The elastomeric fiber of  claim 1  wherein the elastomer is spandex. 
     
     
         3 . The elastomeric fiber of  claim 2  wherein the spandex is a polyether-based spandex polymer. 
     
     
         4 . The elastomeric fiber of  claim 1  wherein the anti-slip polymeric additive is added at a concentration of about 1% to about 4% by weight of the fiber. 
     
     
         5 . The elastomeric fiber of  claim 1  wherein the anti-slip polymeric additive is added at a concentration of about 0.5% to about 10% by weight of the fiber. 
     
     
         6 . The elastomeric fiber of  claim 1  with a fiber denier of from 10 d to 400 d. 
     
     
         7 . The elastomeric fiber of  claim 1  with a fiber denier of from 15 d to 180 d. 
     
     
         8 . The elastomeric fiber of  claim 1 , wherein the anti-slip polymeric additive is a polyurethane comprising bis(4-isocyanatocyclohexyl)methane and N-alkyldiethanolamine or a derivative thereof. 
     
     
         9 . The elastomeric fiber of  claim 1 , wherein the anti-slip polymeric additive is a long side chain polymer. 
     
     
         10 . The elastomeric fiber of  claim 1  further comprising one or more additional additives. 
     
     
         11 . The elastomeric fiber of  claim 10  wherein the one or more additional additives are selected from delustrants, additional antioxidants, dyes, dye enhancers, UV stabilizers, pigments or combinations thereof. 
     
     
         12 . An elastic composite yarn comprising the anti-slip elastomeric fiber of  claim 1 . 
     
     
         13 . The elastic composite yarn of  claim 12  comprising a core comprising the anti-slip elastomeric fiber. 
     
     
         14 . The elastic composite yarn of  claim 13  wherein the core is surrounded by, twisted with, or intermingled with hard fiber. 
     
     
         15 . The elastic composite yarn of  claim 14  wherein the hard fiber is selected from staple fiber, cotton, wool, acrylic, polyamide or nylon, polyester, regenerated cellulose, bamboo, silk, soy or combinations thereof. 
     
     
         16 . The elastic composite yarn of  claim 13  wherein the core further comprises a control filament. 
     
     
         17 . The elastic composite yarn of  claim 16  wherein the control filament is selected from textured polyester, nylon, rayon filament, PPT filament, polyester bi-component filament, or PBT fiber or combinations thereof. 
     
     
         18 . The elastic composite yarn of  claim 13  wherein the composite yarn is a core spun yarn comprising anti-slip elastomeric fiber in the core. 
     
     
         19 . The elastic composite yarn of  claim 13  wherein the said composite yarn is an air covered yarn comprising anti-slip elastomeric fiber in the core. 
     
     
         20 . A woven stretch fabric comprising the elastic composite yarn of  claim 12 . 
     
     
         21 . An article of manufacture comprising the elastomeric fiber of  claim 1 . 
     
     
         22 . The article of manufacture of  claim 21  which is a garment.