MODIFYING WOOL COTTON TEXTILES FOR UNION DYEING/

Pad/dry/cure and cold-hatch processes have been evaluated as pretreatm ent steps for union dyeing wool/cotton textiles. Both processes select ively modify cotton without affecting wool. These processes were compa red to evaluate N-hydroxy and N-methyl urea compound resin systems in the presence of amino or quaternary nitrogen compounds and the monomer ic and polymeric dye-fixative systems containing quaternary ammonium, epoxide, azetidinium, and guanidino constituents. The objective measur ements used for the comparison include union shade index, colorimetric analysis, mechanical properties, and colorfastness.