Role of water & its quality for wet processing, hard water and soft water. Basic concepts of surfactants in textile processing, Natural and added impurities in textiles, Preparatory process sequences for cotton, wool, silk, polyester, nylon, acrylic and blends.
Singeing: Gas singeing, Desizing: Hydrolytic and Oxidative systems, Scouring: Solvent, Conventional and Enzymatic systems, Bleaching with Sodium hypochlorite, Hydrogen peroxide, Sodium chlorite. Optical brightening agents (OBA), mechanism and its application on all fibres. Mercerization of cotton, physical and chemical aspects of mercerization, yarn and fabric mercerizing.
Preparatory processes for protein fibres, wool: Carbonization, scouring, bleaching. Degumming and bleaching of silk. Preparatory processes for synthetic fibres and blends: Objective of heat setting, types of heat setting, working of stenters. Scouring and bleaching of synthetic fibres and blends. Assessment of desizing, scouring, bleaching and mercerization.
Brief introduction to preparatory processing machineries – Batch machines: Pressure Kiers, Vaporloc machines, Jigger, Winch, Semi continuous and continuous machines: J-Box, Padding mangles
General Consideration and classification of textile auxiliaries, Preparation of detergents, comparison between soaps and detergents, Physical principles involved in detergency conditions for efficient detergency.
After completion of the course student will be able to:
This subject is on page 13, 14 of the original AKTU PDF.
