The Finishing Behavior of Cellulosic Man Made Fibers of the Second and Third Generation.

Modal and lyocell fibers represent, respectively, the second and third generation of cellulosic manmade fiber technology. The dyeing of lyocell fibers requires significantly fewer steps than do dyeing processes for previous generations of cellulosic fibers. Its 99 percent recovery rate greatly increases the environmental friendliness of c..

TiO(2)-Assisted Photodegredation of Dyes. 9. Photooxidation of a Squarylium Cyanine Dye in Aqueous Dispersions under Visible Light Irradiation.

Using a variety of spectroscopic, assay, and chemical oxygen demand methods, experiments examined the titanium dioxide (TiO(2)) assisted photodegredation of a laser dye under visible light irradiation. Initial irradiation of squarylium cyanine (SQ) dye in an aqueous TiO(2) dispersion generated an unstable superoxide radical that readily c..

Technological Advances in Textile Wet Processing.

This overview of recent technological advances in textile wet processing discusses pretreatments, dyeing, printing, finishing, pollution, and the adaptability of technological advances to Indian conditions. New pretreatment processes include single-stage scouring and bleaching processes; a redox system for bleaching cotton and blended fab..

Cationisation of Lyocell Fibers.

Researchers developed a method of modifying lyocell fibers that enables the dyeing of cellulosic fabric with anionic wool dyes (acid and reactive dyes) in short periods of time (5 minutes) at mild conditions (60 degrees centigrade and pH 4.2) homogeneously over the entire fiber cross section. Degree of modification determined the depth of..

Green Technology in Textile Processing: Part III -- Eco-Friendly Dyeing of Cotton Goods.

Researchers developed two environmentally friendly processes for dyeing cotton fabrics with reactive, sulfur, and vat dyes. The new processes use environmentally friendly chemicals and recycle low load effluents to reduce the biochemical oxygen demand (BOD) and chemical oxygen demand (COD) in dye facility wastewater. The processes reduce ..

Green Technology in Textile Processing: Part IV -- Eco-Friendly Dyeing of Polyester/Cotton Fabric.

Researchers developed environmentally friendly dyeing processes for dyeing polyester/cotton blend fabrics with disperse/reactive and disperse/vat dyes. Process modifications and the substitution of environmentally friendly chemicals significantly reduced the biochemical oxygen demand (BOD) and chemical oxygen demand (COD) in dyehouse effl..

Nature-Oriented Fashion and melange Fabrics.

Dyeing processes for melange fabrics include doubled dyeing and a multicolor method that involves yarn based on two fibers with different dyeing properties. Kanebo Spinning Corporation's new top dyeing process determines percentage of individual colors that make up to specified color and dyes top in accordance with that percentage. The pr..

Production Experiences with Vat Dyeing on an Aerodynamic Piece Goods Dyeing Machine.

Then GmbH's Airflow AFS 225 dyeing machine piece dyes fabric in rope form. The AFS 225 features a self adjusting AMC-E controller wired to the TDS supervisor system. The TDS system sets up programs, displays all data, and measures values. The Airflow dyeing machine consists of a processing vessel with store room; gas circulation system wi..

Effect of Low-Temperature Air-Plasma Treatment on Wool Dyeing and Its Color Fastness.

Researchers studied the colorfastness of woolen fabric that was treated with low temperature air plasma and dyed with an acid dye. The plasma treated woolen fabric exposed to carbon arc light irradiation exhibited less color fading at the initial stage than that of an untreated woolen fabric. The oxidized substrate resulting from the plas..

The Characteristics of Supercritical Carbon Dioxide Dyeing of Poly(ethylene terephthalate) Fibers.

Researchers compared the use of supercritical carbon dioxide dyeing on commercially available polyethylene terephthalate (PET) fibers with conventional dyeing methods. Fibers were examined for degree of polymerization and microstructure after dyeing with C.I. Disperse Blue 60. The measured value of color deepness (K/S) indicated that fibe..