Fibre comprising composite fibres of cellulose and cellulose acetate

Abstract

The present invention provides a coloured fibre comprising one or more composite filaments of cellulose and cellulose acetate, wherein the colour is effected by a disperse dye.

1 . A coloured fibre comprising one or more composite filaments of cellulose and cellulose acetate, wherein the colour is effected by a disperse dye. 
     
     
         2 . The coloured fibre according to  claim 1 , wherein the weight ratio of the cellulose to the cellulose acetate in the composite filaments is from 99:1 to 1:99, from 95:5 to 5:95, from 90:10 to 10:90, from 80:20 to 20:80, from 70:30 to 30:70, or from 60:40 to 40:60. 
     
     
         3 . The coloured fibre according to  claim 1 , wherein the weight ratio of the cellulose to the cellulose acetate in the composite filaments is from 90:10 to 50:50, from 80:20 to 50:50, from 70:30 to 50:50, or from 60:40 to 50:50. 
     
     
         4 . A fibre blend comprising fibres comprising one or more composite filaments of cellulose and cellulose acetate; and synthetic fibres, wherein the fibre blend is dyeable with a disperse dye. 
     
     
         5 . A coloured fibre blend comprising fibres comprising one or more composite filaments of cellulose and cellulose acetate; and synthetic fibres, wherein the colour is effected by a disperse dye. 
     
     
         6 . The fibre blend according to  claim 4 , wherein the synthetic fibres are selected from polyester fibres, nylon fibres, acrylic fibres, elastane fibres, cellulose acetate fibres, cellulose triacetate fibres, polylactic acid fibres, polypropylene fibres, or polyphenylene sulfide fibres. 
     
     
         7 . A process for manufacturing the coloured fibre of  claim 1 , comprising:
 providing a solution dope comprising a blend of cellulose and cellulose acetate in an ionic liquid or in N-methylmorpholine-N-oxide;   spinning the solution dope into a coagulant to generate the fibres; and   dyeing the fibres with a disperse dye.   
     
     
         8 . A process for manufacturing the coloured fibre of  claim 1 , comprising:
 providing a solution dope comprising a blend of cellulose and cellulose acetate in an ionic liquid or in N-methylmorpholine-N-oxide;   adding a disperse dye to the solution dope; and   spinning the solution dope with the disperse dye into a coagulant to generate coloured fibres.   
     
     
         9 . The process according to  claim 7 , wherein the ionic liquid is selected from butyl-3-methylimidazolium chloride, 1-butyl-3-methylimidazolium acetate and 1-ethyl-3-methylimidazolium acetate. 
     
     
         10 . The process according to  claim 7 , wherein the ionic liquid is selected from 1,1′,3,3′-tetramethylguanidinine carboxylates, 1,8-diazabicyclo[5.4.0]undec-7-ene carboxylates and 1,5-diazabicyclo[4.3.0]non-5-ene carboxylates. 
     
     
         11 . The process according to  claim 7 , wherein the solution dope further comprises a co-solvent. 
     
     
         12 . The process according to  claim 11 , wherein the co-solvent is selected from dimethyl sulfoxide, dimethylformamide, tetrahydrofuran, and dioxane. 
     
     
         13 . The process according to  claim 7 , wherein the weight ratio of cellulose to cellulose acetate in the solution dope is from 99:1 to 1:99, from 95:5 to 5:95, from 90:10 to 10:90, from 80:20 to 20:80, from 70:30 to 30:70, or from 60:40 to 40:60. 
     
     
         14 . The process according to  claim 7 , wherein the weight ratio of cellulose to cellulose acetate in the solution dope is from 90:10 to 50:50, from 80:20 to 50:50, from 70:30 to 50:50, or from 60:40 to 50:50. 
     
     
         15 . The process according to  claim 7 , wherein the solids content of the solution dope is up to about 50% by weight, up to about 45% by weight, up to about 40% by weight, up to about 35% by weight, up to about 30% by weight, up to about 25% by weight, or up to about 20% by weight. 
     
     
         16 . The process according to  claim 7 , wherein the solids content of the solution dope is from about 5% by weight to about 25% by weight, or from about 10% by weight to about 20% by weight. 
     
     
         17 . The process according to  claim 7 , wherein the coagulant comprises water, methanol and/or ethanol. 
     
     
         18 . A process for dyeing fibres comprising one or more composite filaments of cellulose and cellulose acetate, comprising: contacting the fibres with a disperse dye; and washing the dyed fibres with water. 
     
     
         19 . A process for dyeing the fibre blend according to  claim 4 , comprising: contacting the fibre blend with a disperse dye; and washing the dyed fibre blend with water. 
     
     
         20 . A textile manufactured from the coloured fibres according to  claim 1 . 
     
     
         21 . A textile manufactured from the fibre blend according to  claim 4 . 
     
     
         22 . A textile manufactured from the coloured fibre blend according to  claim 5 . 
     
     
         23 . A textile manufactured from fibres comprising composite filaments of cellulose and cellulose acetate, and synthetic and/or natural fibres, wherein the fibres comprising composite filaments and the synthetic and/or natural fibres are provided in separate yarn or thread. 
     
     
         24 . A garment or soft furnishing made at least partly from the textile of  claim 20 .