Disperse Dyeing Blends Containing Polyester

Pilot-scale Investigation. Approximately 1.3 billion pounds of the textile fabrics and yarns that are annually batch-dyed are composed of 100% cotton or some percentage of cotton/polyester blends [2). The three major dye classes that have been utilized in recent years to color cotton-containing fabrics are vats, directs and reactives for 100% cotton, and these dyes plus disperse dyes for cotton/polyester blends. Several recent... 

Considerable research effort has been devoted to developing a new generation of disperse dyes designed to optimise fastness to washing and minimise cross-staining of the cellulosic component of polyester/cellulosic blends [97,98]. Diester-containing monoazo disperse dye structures (4.91) that yield a dicarboxylic acid on hydrolysis and certain thienylazo blues... 

BURCO CARRIER CDP is a butyl benzoate type carrier for the dyeing of polyester and triacetate fibers, and blends containing these fibers. It can be used as a carrier with disperse and cationic dyestuffs. 

Chlorination was found (172) to be the most suitable and effective method for decolori2ing and reducing the COD of waste dyebaths containing a2o dyes. These findings have been substantiated for chlorination and biochemical purification (173). A study (174) has been done on the technical and economic feasibiUty of a chlorination dye wastewater reclamation system for treating effluent that is suitable for reuse in dyeing of polyester/cotton blends with disperse and direct dyes. 

Dye Combinations. In certain cases it is desirable to print fiber blends with combinations of the appropriate dye classes, rather than with pigments. Only polyester-cellulose blends are of commercial importance and the following dye systems have been developed for them. The dyes of the different classes are contained in the same print paste and, therefore, are applied simultaneously in one print operation. They include disperse-reactive combinations, disperse-pigment combinations, and disperse-vat combinations. 

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