Continuous Dyeing: Colour Differences along the Fabric Piece.

Continuous or semicontinuous piece dyeing causes a color fault along the fabric piece. The fault is characterized by a progressive difference in color intensity. The fault results from higher dye pick-up at the start of the dyeing process after equilibrium is reached. This leads to the rejection of a certain initial length of the dyed fab..

An Investigation into the Use of Supercritical Fluid Technology for Analytical, Process and Environmental Applications in Textiles.

Research on the use of supercritical fluid (SCF) technology in the textile industry focused on disperse dyeing from supercritical carbon and the development of a detector system that permits the study of SCF extraction in real time. The objective was to generate quantitative data that compare SCF carbon dioxide dyeing with high temperatur..

Real-Time Analysis and Control of Batch Dyeing Processes.

The Dye Applications Research Group at North Carolina State University, formed in 1986 and funded in part by the National Textile Center, is conducting research on the real time analysis and control of batch dyeing processes. A summary of the research describes a method for real time monitoring of disperse dye exhaustion on polyester and ..

Electrochemistry in Textile Finishing.

An introduction to electrochemical processing technology as an alternative to conventional reducing agents highlights indigo dyeing (indirect reduction), exhaust vat dyeing (indirect reduction), sulfur dyes (indirect and direct reduction), and direct electrolysis for color stripping of azo dye effluent. In electrochemical reduction, elect..

Neolan A-- A New Dye Range for Wool Piece and Hank Dyeing.

Ciba Specialty Chemicals Incorporated developed a new range of metal-free acid dyes for wool and wool/nylon blends. Neolan A dyes give bright colors and Neolan P dyes give more muted colors to wool pieces and hanks. The Neolan A range includes five compatible trichromatic dyes and three supplementary dyes. Albegal NA and Glauber's salt le..

Rapid Multi-phase Processing Range.

Kleinewefers' Pre-Yet and Raco-Yet units facilitate multiphase continuous processing implementation via advanced jet spray technology for desizing, scouring, and other processes. Pre-Yet's simultaneous application of thermal, kinetic, and chemical energy facilitates scouring and desizing of both synthetic and natural insoluble sizes prior..

Simultaneous Dyeing and Finishing.

A research project a North Carolina State University to develop a simultaneous dyeing and finishing process will probably achieve this objective by the use of dyes that finish, as well as color, fibers. Preliminary experiments will focus on the design and synthesis of dyes that impart water resistance. These dyes are disperse or fiber rea..

Innovative Wet Processing Solutions.

New technology in the dyeing and finishing sector includes Babcock's improved tentering machines with new air flow designs, modular electronics, and automated controls. Benninger offers wet-on-wet application in its line of slashing equipment to lower chemical costs. Jemco and Clariant collaborated to create an environmentally friendly bl..

Fast and Frugal, but Can It Do Lyocell?

To develop such aesthetic properties as drape, silk-like hand, and dimensional stability in fabrics manufactured from lyocell, machinery manufacturers, including Then, ATYC, Longclose, MCS, and Brazzoli, are developing machiner for specialized wet processing techniques. Then's Ariflow machine not only reduces crease formation, but also pr..

Striving for Excellence in Cotton Dyeing and Finishing.

The Cotton 1998 conference highlighted new developments in cotton processing, dyeing, and finishing. New testing machines include the Quickwash Plus for determining fabric shrinkage. Partitioned into five pie shaped sections, the unit uses a microprocessor to sort up to nine different laundering programs. One cycle of the Quickwash Plus e..