Modification of wool and dyeing with basic dye

The modification of wool with a reactive anionic modifier and then dyeing with a basic dye was studied. Analysis of the infrared spectrum shows that the wool fibre combines the modifier with a covalent bond, introducing an anionic group to the wool fibre, changing its electrical properties and its dyeing ability, enabling it to be dyed wi..

Water quality in dyeing and bleaching

Experience with textile dyeing and bleaching at various locations in the Pearl River Delta, China, is summarized. Waster hardness in some areas can lead to uneven dyeing, dyeing precipitation, shade dulling, harsh fabric handle or chalking is a waters softening agent was not added to the dyebath. Areas where additional water treatemtn is ..

Decolorization of reactive dyes and dyeing wastewater by microorganisms under anaerobic conditions

The decolorization of four reactive dyes of the azo or anthraquinone group, printing wastewate and winch wastewater wasinvestigated using microorganisms under anaerobic conditions. Reactive dyes of the azo group were effectively decolorized. The mechanism of decolorization was suggested to be a reductive cleavage of the azo bond. Decolori..

COE processing

The treatment of dyehouse wastewater using a process known as COE (Catalytic Oxideation of Effuents) is described. The process is reported to decolorize, detoxify and deodorize effluents, while also significantly reducing their chemical oxygen demand. Catalysed oxidation using hydrogen peroxide can achieve colour reducting of around 99％ ..

Reviewing dyeing characteristics of acetate fibers

Dyeing acetate fibres is reviewed throughly to show some new possiblities of improving its dyeability with disperse, azoic, acid and cationic dyes. The fastness, techniques and conditions of dyeing dye-absorption, fixation, levelling and vapour phase dyeing of acetate fibres are also reported.

Dyeing behavior of aramid fibers treated with organic solvents.

Dyeing behavior of Technora, a p-aramid fiber, after treatment with organic solvents was studied. By treating with dimethyl sulfoxide (DMSO), the fiber shrinkage increased as a result of disorientation of the chains in the amorphous region. Appreciable effects were not found with other solvents such as dimethyl formamide (DMF) and dimethy..

Dyeability improvement of amine-modified acetate fibers

Cellulose acetate treated with amine solutions showed relatively high affinity to direct dyes. Methylamine was found to be more efficient in improving the color intensity of the modified and dyed acetate substrates than di- and trimethylamines. The color intensity of dyed acetate fabrics treated with diethylamine was higher than that of f..

Algorithm for Optimizing Color Prediction in Blends.

In colorimetric matching, the four color system cannot always match the blends of precolored fibers. Researcers investigating colorimetric matching attempted to adjust, reconstruct, and modify the current tristimulus color matching algorithm for better application in blending precolored fibers. The proposed algorithm suggests an initial s..

Evaluation of Detergency

Detergency is the removal in a liquid of unwanted substances (soils) from a substrate's surface. The effectiveness of soil removal depends on such factors as the type of detergent, the mechanical action during washing, and the type of substrate. Extensive testing determines the optimal detergent formulations and washing machine designs fo..

Disperse Dyeable Polyester Filament Under the Normal Pressure.

In April 1995, Toray Industries will launch Poliloft, a polyester filament dyeable with disperse dyes at 98 degrees centigrade and under normal pressure. Poliloft allows polyester filaments to be dyed with dyeing machines currently used for dyeing nylon at normal temperatures and pressures. In blends with natural fibers, polyester filamen..