cotton fabrics

The aim of this study was the development of a prototype machine for the processing of fabrics, which can be used as a reactor for the continuous finishing processes. The optimum applicator design for fabrics was developed in accordance with laboratory-scale experimental studies. Reactive printed samples were treated with the combination of radio frequency and steam in order to take advantage of the steam energy and to improve energy absorption. The colour yields of the samples fixated with the combination of radio frequency and steam energy were compared with conventional steaming (10 min) and thermofixation (5 min) processes. It was observed that steam-assisted radio frequency fixation ensured similar colour yields in a shorter setting time (3 min) compared with conventional methods. It was concluded that the new system could be an alternative method of setting, with the advantages of time savings and lower energy consumption

Application of Exergy Analysis to Textile Printing Process

This study reveals an exergetic analysis of the reactive and pigment printing processes. Exergy models of the printing processes were formed and each step examined in terms of exergetic parameters. In the printing machine, the reactive printing process led to a higher specific exergy use due to the penetration requirement of the printing paste. The exergy efficiency in the subsequent drying after printing was found to be independent of the printing method, but affected by the fabric structure, which was calculated to be between 3.8% and 4.8%. In the fixation step, pigment printing provided the highest exergy efficiency, calculated to be 2.15%, due to the direct heating of the fixation air. It was observed for the fixation step that the boiler unit of the steaming process and the burner of the hot air fixation process led to the highest exergy destruction rates. The total exergy destruction rate in pigment printing was found to be higher than in the washing and final drying stages of reactive printing alone; thus, it was shown that the exergetic improvement of the post-washing and drying of reactive printing is of great importance

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printing with reactive dyes

In general sodium alginate is used as a thickener in the pretreatment paste in ink-jet printing with reactive dyes. The aim of this study is to investigate the use of different types of thickeners as a replacement for sodium alginate in the pretreatment paste in digital ink-jet printing of cotton fabrics and the possibilities of achieving higher color yields, better sharpness properties, better fastness properties, and more ecological processes (with the decrease of urea requirements). For this purpose experiments with three types of thickener (sodium alginate, sodium carboxymethyl cellulose and polyacrylic acid derivate) were carried out. The results showed that sodium carboxymethyl cellulose can be used properly in the pretreatment paste for reactive ink-jet printing

Application of Exergy Analysis to Textile Printing Process

This study reveals an exergetic analysis of the reactive and pigment printing processes. Exergy models of the printing processes were formed and each step examined in terms of exergetic parameters. In the printing machine, the reactive printing process led to a higher specific exergy use due to the penetration requirement of the printing paste. The exergy efficiency in the subsequent drying after printing was found to be independent of the printing method, but affected by the fabric structure, which was calculated to be between 3.8% and 4.8%. In the fixation step, pigment printing provided the highest exergy efficiency, calculated to be 2.15%, due to the direct heating of the fixation air. It was observed for the fixation step that the boiler unit of the steaming process and the burner of the hot air fixation process led to the highest exergy destruction rates. The total exergy destruction rate in pigment printing was found to be higher than in the washing and final drying stages of reactive printing alone; thus, it was shown that the exergetic improvement of the post-washing and drying of reactive printing is of great importance

A STUDY ON THE PROCESS PARAMETERS OF DISCHARGE PRINTING OF COTTON

Discharge printing of cotton fabrics with sodium- and zinc formaldehyde sulphoxylate with different fixation conditions was discussed in this study. Superheated steam, saturated steam and thermofixation were used for fixation processes. It was observed that steam based fixations resulted in the higher discharging effects, while thermofixation lead to an inadequate effect even in higher temperatures. Superheated steam was found to be advantageous in terms of lower fixation times. Sodium formaldehyde sulphoxylate gave superior discharging effects compared with zinc formaldehyde sulphoxylate, which caused higher strength loss especially in superheated steam fixation. Furthermore, the effects of the softeners on the discharge printing results were also investigated in the scope of the study

Effects of pretreatment processes on printing viscose fabrics with reactive dyestuffs

WOS: 000188744600011In this project, the investigated parameters that affect the print quality of reactive dyestuffs on viscose fabrics are causticizing, bleaching, reductive treatment, padding with urea, moisturizing before printing and fixation, the amount and existence of urea in the print paste, and two fixation methods. In all these experiments, Cibacron Red P 4B and Cibacron Blue P 3R, which have the same reactivity but different molecular sizes, are used as dyestuffs. The experiments done in the laboratory are repeated in industry, and the results are examined by comparing the color efficiencies, fastness rates, and tensile strengths of the printed fabrics