Abstract An improved process for dyeing napped fabrics comprising water swellable cellulosic fibers, for example cotton fibers, alone or blended with synthetic fibers, for example polyester fibers, by contacting the cellulosic fibers of the fabric throughout with an aqueous solvent- or solvent solution of a preformed disperse dye of low water solubility, said solvent consisting of ethylene glycol or a derivative thereof which is at least partially miscible with water, has a boiling point above 150*C., and is a solvent for the dye at some temperature up to 225*C., for example diethylene glycol monomethyl ether, the improvement comprising contacting the cellulosic fibers of the napped fabric with water, preformed disperse dye and solvent, removing a substantial part of the water by drying, overspraying the fibers after said removal of water with a water-solvent mixture, heating until the cellulosic fibers are contacted throughout with a solution of the dye, and thereafter fixing the dye and recovering napped fabric having the water swellable cellulosic fibers dyed throughout.
The process of claim 1 wherein the cellulosic fibers are contacted with water, dye, solvent and boric acid.
Claim 2
Dependent Claim
129 words
about 50-300 grams per liter of a solvent which is ethylene glycol or a derivative thereof which is at least partially miscible with water, has a boiling point above 150*C., and is a solvent for the dye at some temperature up to 225*C.; B. removing a substantial part of the water by drying; C. overspraying the fabric to about 2.5-20 weight percent pickup, based on the weight of fabric, with a water-solvent mixture containing about 5-20 weight percent solvent which solvent is ethylene glycol or derivatives thereof; D. heating the fabric for at least 30 seconds at 150*-225*C. until the cellulose fibers are contacted throughout with a solution of the dye; and E. fixing the dye within and throughout the fibers by precipitating same and recovering dyed napped fabric.
Claim 3
Dependent Claim
14 words
The process of claim 1 wherein the water swellable cellulose fibers are cotton fibers.
Claim 4
Dependent Claim
87 words
In an improved process for dyeing napped fabrics comprising water swellable cellulose fibers by contacting the cellulose fibers of the fabric throughout with an aqueous solvent- or solvent solution of a preformed disperse dye of low water solubility, said solvent consisting of ethylene glycol or a derivative thereof which is at least partially miscible with water, has a boiling point above 150*C., and is a solvent for the dye at some temperature up to 225*C., the improvement comprising: A. padding the napped fabric with a dyebath comprising:
Claim 5
Dependent Claim
26 words
The process of claim 4 wherein the dyebath contains up to 15 grams per liter of boric acid and heating is carried out for 0.5-3 minutes.
Claim 6
Dependent Claim
17 words
The process of claim 5 wherein the water-solvent mixture contains up to 1 weight percent boric acid.
Claim 7
Dependent Claim
14 words
The process of claim 4 wherein the water swellable cellulose fibers are cotton fibers.