Dyeing in Catalase-Treated Bleaching Baths.

Researchers replaced conventional rinsing with an enzymatic treatment using catalases to remove residual hydrogen peroxide from bleached fabrics and evaluated the treated bleaching liquor for use in dyeing. Ultraviolet spectrophotometry measured enzyme activity after decomposition of hydrogen peroxide. A reflectance measuring instrument u..

Kinetics and Equilibria in Dyeing. N.

Measurements at equilibrium and under kinetic conditions reveal the dye content of dyed fibers and the relationship between dye content and visual appearance. The equilibrium uptake of dye is the maximum dye absorption under specific dyeing conditions. Nernst, Freundlich, and Langmuir sorption isotherms characterize and classify the dye/f..

Brazzoli Sirio HT: High-Tech Dyeing.

Brazzoli's sirio HT rope dyeing machines features a compact design that combines high capacity with flexibility. The machines handle up to four ropes of woven or knit fabric (150-200 kilograms each) at up to 600 meters per minute. Bath ratio ranges from 1:6 to 1:8 at 140 degrees centigrade and a pressure of 4.5 bars. Dyeing occurs in the ..

Automated Dyeing

Botto Poala's new dyeing plant features the TMB/CNN hank dyeing machine from Obem and Maibo, which requires no human handling of materials, except for hanging the hanks for final unloading from the dryer. With the installation of an automated color kitchen, Botto Poala will produce 1,000-1,200 kilograms of yarns per day, doubling its curr..

Wet Process Systems Face Growing Challenge.

Electronic and mechanical patterning systems for tufting machines and looms are taking market share from carpet dyeing, finishing, and printing machines. Continuous dyeing remains the most popular coloration method in the United States and Europe. Kusters' QCF Fluidyer carpet dyeing machine integrates dye application iwht online dye liquo..

Prospects and Risks during Processing of Elastic Fibers.

Finishing elastane fabrics requires fabrics to be in rolled form due to the high shrinkage rate of batched fabrics, which can result in defects. Storage of unrelaxed fabrics in tight rolls can result in moire effects. Storage in humid atmospheres can change fabric width and density. During relaxation on a steam table, steam quantity and f..

Computations in Colorant Formulation and Batch Correction.

An overview of the matrix algebra application method for obtaining dye recipes and batch corrections via computer software based iteration during Procion M dyeing of unmercerized cotton addresses calculation of tristimulus values from reflectance values, the Kubelka Munk relationship, calculating reflectance backward from K/S values at an..

On-Line Moisture Control System.

The effect of slight variations in moisture content can be detrimental to some fibers, yarns, and fabrics. In processes in which the moisture content of a textile as it exits the dryer is critical, a tendency to overdry exists, which wastes energy and limits productivity. An online moisture control system enables the processor to increase..

New Developments in Processing Machinery for Woven and Knitted Fabrics.

An overview of new developments in woven and knit fabric processing machinery focuses on washing, bleaching, printing, and finishing machines, as well as dryers and plasma treatment lines. Concord's washing machine features 8-14 compartments and uses an overflow system to transport the fabric in rope form. Synchrowash's washing machine re..

Enzymes in Corn Fiber Saccharification.

Corn fiber is a byproduct of the wet milling industry and acts as a low cost feedstock in fuel ethanol manufacture. Experiments evaluated pretreatments, including hot water, alkali, and dilute acid pretreatments, as well as enzymatic saccharification, for the conversion of corn fiber starch, cellulose, and hemicellulose to fermentable sug..