Method of pretreatment of cellulose containing textiles

Abstract

A method for pretreatment of cellulose-containing textiles characterized by applying an aqueous solution with a pH between 1 and 7 and containing at least one agent for durably changing the surface morphology of the cellulose, preferably a neutral salt.

1 . A method for pretreatment of cellulose-containing textiles characterized by applying an aqueous solution with a pH between 1 and 7 to selected areas of the textile, wherein the aqueous solution comprises at least one agent durably changing the surface morphology of cellulose. 
     
     
         2 . The method according to  claim 1 , wherein said aqueous solution is applied to the surface of the textile in a way that it essentially remains at the surface of the textile. 
     
     
         3 . The method according to  claim 1 , wherein the textile is provided in sheet form. 
     
     
         4 . The method according to  claim 3 , wherein the aqueous solution is applied at only one side and/or on selected areas of the sheet textile. 
     
     
         5 . The method according to  claim 1 , wherein said agent is selected from the group consisting of ionic liquids, organic solvents, inorganic salts, or mixtures thereof. 
     
     
         6 . The method according to  claim 5 , wherein the agent is selected from the group of 1-n-butyl-3-methylimidazolium chloride, 1-allyl-3-methylimidazolium chloride, homologous substances or acetates thereof, N-methylmorpholine-N-oxide, Mg(NO 3 ) 3 , LiNO 3 , CaCl 2 , ZnCl 2 , LiCl, NaSCN, MgCl 2 , LiCl/N,N-dimethylacetamide, NH 4 Cl/1,3-dimethylurea, NaCl/urea, or mixtures thereof. 
     
     
         7 . The method according to  claim 1 , wherein said aqueous solution is applied to the textile by spraying, slop-padding, knife coating, printing, foaming, or a combination thereof. 
     
     
         8 . The method according to  claim 1 , wherein said aqueous solution is a neutral salt solution. 
     
     
         9 . The method according to  claim 1 , wherein the aqueous solution comprises a thickening agent. 
     
     
         10 . The method according to  claim 1 , wherein the aqueous solution comprises a moisturizer. 
     
     
         11 . The method according to  claim 9 , wherein the moisturizer comprises glycerol. 
     
     
         12 . The method according to  claim 1 , wherein after application of said aqueous solution a drying step is conducted. 
     
     
         13 . The method according to  claim 12 , wherein said drying step is conducted by heating the textile. 
     
     
         14 . The method according to  claim 13 , wherein after the drying step the textile is dyed. 
     
     
         15 . The method according to  claim 14 , wherein the textile is dyed in at least some areas. 
     
     
         16 . The method according to  claim 13  wherein after the morphology changing step the textile is washed and stored before later dyeing. 
     
     
         17 . The method according to  claim 1 , wherein the textile comprises textile fibers woven into a fabric. 
     
     
         18 . The method according to  claim 1 , wherein the treatment with said aqueous solution is conducted on ready-made finished textiles before a washing. 
     
     
         19 . The method according to  claim 1 , wherein the fabric is rinsed before an enzymatic cellulase treatment. 
     
     
         20 . The method according to  claim 1 , wherein said textile is indigo-dyed. 
     
     
         21 . The method according to  claim 1 , wherein said textile is a denim fabric. 
     
     
         22 . A method for imprinting a pattern on a dyed textile, comprising the steps of:
 a. pre-treating the textile with an aqueous solution having a pH of between 1 and 7 to selected areas of the textile representing the desired pattern, wherein the aqueous solution comprises at least one agent durably changing the surface morphology of the cellulosic fibers;   b. optionally drying the textile; and   c. optionally dyeing the textile.   
     
     
         23 . The method for imprinting a pattern on a dyed textile according to  claim 22 , further comprising the step of applying a cellulase preparation after the pre-treating step a. 
     
     
         24 . The method for imprinting a pattern on a dyed textile according to  claim 22 , further comprising the step of adding chemicals to the textile. 
     
     
         25 . The method for imprinting a pattern on a dyed textile according to  claim 22 , further comprising the step of performing a heat/cure treatment. 
     
     
         26 . The method for imprinting a pattern on a dyed textile according to  claim 25 , wherein the heat/cure treatment is performed by means of a CO 2 -Laser.