Lyocell filament denim

Abstract

The invention relates to a denim fabric as it is used for clothes ( 1 ). The fabric is made from weft yarns ( 4 ) and warp yarns ( 6 ). At least one of the warp yarns and the weft yarns contains or consists of lyocell filaments ( 8 ). The resulting material combines high mechanical strength against wear and tear with superior softness, smoothness and luster. Furthermore, the denim according to the invention is bleachable. The denim according to the invention represents a new class of denim alongside existing cotton denims and denims with a silk component.

1 . A lyocell denim made from weft yarns and warp yarns, wherein at least one of the weft yarns and the warp yarns contains or consists of lyocell filaments. 
     
     
         2 . The lyocell denim according to  claim 1 , wherein the denim is bleached. 
     
     
         3 . The lyocell denim according to  claim 1 , wherein the denim has a TS7 value of no more than 6 in a TSA test in the fixed state and/or after garment wash and/or after bleaching. 
     
     
         4 . The lyocell denim according to  claim 1 , wherein the denim has a TS750 value of no more than 100 in the fixed state and/or after garment wash and/or after bleaching. 
     
     
         5 . The lyocell denim according to  claim 1 , wherein the yarn strength of the yarns containing or consisting of lyocell is at least 25 cN/tex after fixation and/or at least 4.5 cN/tex after garment wash and/or at least 2 cN/tex after bleaching. 
     
     
         6 . The lyocell denim according to  claim 1 , wherein the denim scores at least one at least 15,000 cycles to hole formation in a Martindale abrasion test in the fixed state and 8,000 cycles to hole formation in a Martindale abrasion test after garment wash and/or after bleaching. 
     
     
         7 . The lyocell denim according to  claim 1 , wherein the warp face of the denim has a pilling grade of no worse than 5 in the fixed state and/or no worse than 5 after garment wash and no worse than 5 after bleaching in a Martindale pilling test. 
     
     
         8 . The lyocell denim according to  claim 1 , wherein the yarn elongation of at least one of the warp and weft yarn containing the lyocell filaments is at least 4% after fixation and/or at least 2% after garment wash and/or at least 1% after bleaching. 
     
     
         9 . The lyocell denim according to  claim 1 , wherein the of the denim on the warp face has a hairiness grade no worse than 4 after garment wash and no worse than 3 after bleaching. 
     
     
         10 . The lyocell denim according to  claim 1 , wherein the fiber splice of the denim has a grade of no worse than 4 before and/or after fixation and/or no worse than 4.5 after garment wash and/or no worse than 4.5 after bleaching. 
     
     
         11 . The lyocell denim according to  claim 1 , wherein the specific hand in the direction of the warp and/or weft yarns that combine or consist of lyocell filaments is at least 4 mN m 2  g −1  after garment wash and/or at least 3 mN m 2  g −1  after bleaching. 
     
     
         12 . The lyocell denim according to  claim 1 , wherein the yarn consisting of or containing lyocell filaments has a luster of at least 20% reflection. 
     
     
         13 . A garment comprising a lyocell denim according to  claim 1 . 
     
     
         14 . A yarn comprising lyocell filaments in a denim fabric.