Lyocell fiber comprising a matting agent and its use for the production of a textile fabric

Abstract

The invention shows a lyocell fiber containing a matting agent whereby the matting agent comprises between 2 wt.-% and 5 wt.-% BaSO4 and less than 1 wt.-% TiO2, with respect to fiber weight, whereby the matting agent is incorporated in the fiber matrix in the form of particulates. The invention further concerns the use of said fiber for the production of a textile fabric and a textile fabric containing said fibers.

What is claimed is: 
     
         1 . Lyocell fiber comprising a matting agent, characterized in that the matting agent comprises between 2 wt.-% and 5 wt.-% BaSO 4  and less than 1 wt.-% TiO 2 , with respect to fiber weight, whereby the matting agent is incorporated in the fiber matrix in the form of particulates. 
     
     
         2 . Lyocell fiber according to  claim 1 , characterized in that the matting agent comprises between 3 wt.-% and 5 wt.-% BaSO 4  and between 0.5 wt.-% and 0.9 wt.-% TiO 2 , with respect to fiber weight. 
     
     
         3 . Lyocell fiber according to  claim 1 or 2 , characterized in that the BaSO 4  particulates having a particle size distribution defined by an x 50  lower than 1.5 μm and an x 99  lower than 4 μm. 
     
     
         4 . Lyocell fiber according to any of  claims 1 to 3 , characterized in that the TiO 2  particulates having a particle size distribution defined by an x 50  lower than 1 μm and an x 99  lower than 2 μm. 
     
     
         5 . Lyocell fiber according to any of  claims 1 to 4 , characterized in that the fiber exhibits a titer from 1.1 dtex to 2.5 dtex, preferably from 1.3 dtex to 2.0 dtex. 
     
     
         6 . Use of a lyocell fiber according to any of  claims 1 to 5  for the manufacture of a textile fabric. 
     
     
         7 . Use according to  claim 6 , characterized in that the manufacture of the fabric comprises spinning a yarn using the lyocell fiber and dyeing at least a part of the yarn, more particularly with an indigo dye. 
     
     
         8 . Textile fabric, having at least a first yarn comprising lyocell fibers according to any of  claims 1 to 5  and a second yarn, whereby the first and second yarn are interweaved to form the textile fabric. 
     
     
         9 . Textile fabric according to  claim 8 , characterized in that the second yarn comprises lyocell fibers according to any of  claims 1 to 5 . 
     
     
         10 . Textile fabric according to  claim 8 or 9 , characterized in that the fabric has a wrinkle recovery rate of 60% or greater. 
     
     
         11 . Textile fabric according to any of  claims 8 to 10 , characterized in that the fabric has an opacity of 0.75 or greater, more preferably of 0.8 or greater. 
     
     
         12 . Textile fabric according to any of  claims 8 to 11 , characterized in that the fabric is a denim fabric and the first yarn comprises an indigo dye on its surface. 
     
     
         13 . Textile fabric according to any of  claims 8 to 11 , characterized in that the first and or second yarn are reactive dyed, direct dyed or vat dyed. 
     
     
         14 . Textile article comprising a textile fabric according to any of  claims 8 to 12 .