Removal of Disperse Dyestuffs from Effluent Liquors with the Help of Cationic Polymers.

The addition of cationic precipitants facilitates the decoloration of effluents containing reactive dyes. The behavior of these precipitants in dyebath effluents containing nonionic and/or anionic dyes, however, is not well understood. Researchers added a cationic polymer precipitant with quaternary ammonium chloride groups and a molecula..

Decolorization of Reactive Dyes and Dyeing Wastewater by Microorganisms under Anaerobic Conditions.

Researchers investigated the decolorization of four reactive dyes with an azo or anthraquinone group and wastewater from desizing, printing, and winch dyeing operations using microorganisms under anaerobic conditions. The reactive dyes with the azo group were effectively decolorized. The mechanism of decolorization was probably the reduct..

Retrospect of Textile Machinery in the 5th OTEMAS. Part 1.

A review of textile machinery on display at the Fifth Osaka Textile Machinery Show (OTEMAS), held in Japan during November 1993, discusses engineering trends and profiles exceptional equipment. Equipment profiles include specification tables and, in most cases, photographs. In Part One, sections bear the following titles: General Outline,..

Retrospect of Textile Machinery in the 5th OTEMAS. Part 2.

A review of textile machinery on display at the Fifth Osaka Textile Machinery Show (OTEMAS), held in Japan during November 1993, discusses engineering trends and profiles exceptional equipment. Equipment profiles include specification tables and, in most cases, photographs. In Part Two, sections bear the following titles: Knitting Machine..

Double Overflow Technology - A Major Advance in Fabric Dyeing.

Sclavos' Double Overflow Technology, as integrated in its Apollon Twin Soft Flow dyeing machine, represents a significant development in fabric dyeing. The machine dyes elastic fabrics with no problems and frequently with no heat setting because of the very low lengthwise tension during dyeing. The low tension reduces edge curling and ter..

Overcoming Problems of Dyeing Microfibers.

Fong/Henriksen's air jet dyeing machine is designed to overcome mechanical problems normally associated with the dyeing of microfibers. It features short turnaround times, dyeing with low liquor ratios, and a fully automated process that allows for the changing conditions of the fabric over the dyeing cycle. Exchange of dye liquor does no..

New Dyeing Machine Blow-Dye

H. Krantz Textiltechnik GmbH installed a Blow-Dye prototype dyeing machine at the Cemtas mill in Istanbul, Turkey. The Blow-Dye is suitable for all tubular goods that do not require high temperature processing. Fabric transport is continuously adjustable. The liquor feed utilizes a pressureless overflow system. Adjustable chamber widths o..

Double Overflow Technology

Since its introduction at ITMA 1967, jet dyeing machines have revolutionized the dyeing of textile fabrics in rope form. By increasing the dye to goods interchange, improving dyebath circulation, removing all temperature and concentration gradients in the bath, enhancing the breakdown of boundary layers at the fiber surface, and rearrangi..

Application of Ultrasonic in Dyeing and its Effluent Problems.

To determine the effect of ultrasonic vibration on the direct dyeing of cotton fabrics, researchers immersed preconditioned fabric samples in dyebaths for durations of up to 90 minutes and exposed them to varying accoustic intensities. A comparison of performance data from conventional and ultrasonic dyeing processes revealed that acousti..

Reactive Dyeing on Cotton/Polyester Blends and Effluent Problem: Part 2.

Researchers assessed the dyeability of various polyester/cotton blend woven fabrics, focusing on the effects of dyeing process (single bath versus double bath) and blend ratio (polyester/cotton ratios of 80:20, 67:33, 48:52, and 44:56). Tests employed Reactofix Purple HE BR reactive dye, and the samples were measured by a Spectronic 20D s..