Elastic fabric and process of preparation

Abstract

The disclosure provides a woven fabric, wherein all warp and weft yarns may be elastic. One or more of the weft and warp yarns may have a stretchable core comprising a first elastic fiber and a second fiber that may be less elastic than said first fiber. The elastic warp yarns may have a twist level with a twist multiplier in the range of 2.5 to 6. In embodiments, a woven fabric may include all warp and weft yarns being elastic, all weft and warp yarns having a stretchable core comprising a first elastic fiber and a second fiber that is less elastic than said first fiber, and the elasticity of the fabric in warp direction is at least 25% and elasticity of the fabric in weft direction (Eweft) is at least 25%, preferably at least 30%, more preferably 40%. In embodiments, the elasticity of the fabric in the warp direction may be at least 25%.

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         39 . A woven fabric comprising;
 elastic warp yarns;   elastic weft yarns,   said elastic warp yarns and elastic weft yarns each having a stretchable core and an inelastic fibers sheath covering said core, said stretchable core including a first elastic fiber and a second fiber that is less elastic than said first elastic fiber;   said woven fabric having an elasticity in warp direction of at least 25% (measured according to ASTM D3107 - Stretch); and   said elastic warp yarns having a twist level with a twist multiplier in the range of 2.5 to 6.   
     
     
         40 . The woven fabric according to  claim 39 , comprising:
 wherein the twist multiplier is in the range of 3.5 to 4.7.   
     
     
         41 . The woven fabric according to  claim 39 , comprising:
 wherein said first elastic fiber and said second fiber are intermingled with a number of connecting points within the range of 20 to 1000 twists per meter;   said elasticity in said weft direction is greater than said elasticity in said warp direction;   said second fiber comprises a PBT elastomultiester, a bicomponent PTT/PET or PTT/PBT, or nylon; and   said first elastic fiber comprises a polyolefin elastomer or a polyurethane elastomer.   
     
     
         42 . The woven fabric according to  claim 39 , comprising:
 wherein said first elastic fiber is stretchable to at least 400% of an initial length of said first elastic fiber and said second fiber is stretchable to at least 20% of an initial length of said second fiber but is less stretchable than said first elastic fiber.   
     
     
         43 . The woven fabric according to  claim 39 , comprising:
 wherein said woven fabric comprises denim.   
     
     
         44 . A clothing article comprising:
 a woven fabric, said woven fabric comprising elastic warp yarns and elastic weft yarns;   said elastic warp yarns and elastic weft yarns each having a stretchable core and an inelastic fibers sheath covering said core, said stretchable core including a first elastic fiber and a second fiber that is less elastic than said first elastic fiber,   said woven fabric having an elasticity in warp direction of at least 25% (measured according to ASTM D3107 - Stretch), and   said elastic warp yarns having a twist level with a twist multiplier in the range of 2.5 to 6.   
     
     
         45 . The clothing article according to  claim 44 , comprising:
 wherein the twist multiplier lies in the range of 3.5 to 4.7 and said elasticity in weft direction is greater than said elasticity in warp direction.   
     
     
         46 . The clothing article according to  claim 44 , comprising:
 wherein said first elastic fiber is stretchable to at least 400% of an initial length of said first elastic fiber and said second fiber is stretchable to at least 20% of an initial length of said second fiber, said second fiber being less stretchable than said first elastic fiber.   
     
     
         47 . The clothing article according to  claim 44 , comprising:
 wherein said first elastic fiber and said second fiber are intermingled with a number of connecting points within the range of 20 to 1000 twists per meter;   said elasticity in said weft direction is greater than said elasticity in said warp direction;   said second fiber comprises a PBT elastomultiester, a bicomponent PTT/PET or PTT/PBT, or nylon; and   said first elastic fiber comprises a polyolefin elastomer or a polyurethane elastomer.   
     
     
         48 . The woven fabric according to  claim 39 , comprising:
 said woven fabric having elasticity in weft direction of at least 40% (measured according to ASTM D3107 - Stretch).   
     
     
         49 . The clothing article according to  claim 44 , comprising:
 said woven fabric having elasticity in weft direction of at least 40% (measured according to ASTM D3107 - Stretch).   
     
     
         50 . The woven fabric according to  claim 39 , further comprising:
 wherein elasticity of the fabric in weft direction (E weft ) is higher than the elasticity in warp direction (E warp ).   
     
     
         51 . The woven fabric according to  claim 39 , further comprising:
 wherein elasticity of the fabric in warp direction (E warp ) is higher than elasticity in the weft direction (E weft ).   
     
     
         52 . The clothing article according to  claim 44 , comprising:
 wherein elasticity of the fabric in weft direction (E weft ) is higher than the elasticity in warp direction (E warp ).   
     
     
         53 . The clothing article according to  claim 44 , comprising:
 wherein elasticity of the fabric in warp direction (E warp ) is higher than elasticity in the weft direction (E weft ).