Chemical Processing of Textiles

Importance of textile wet processing, role of water in textile processing, dye house water standards, surfactants and their role in detergency, preparatory process; singeing, desizing, scouring, role of heat setting in synthetic material. bleaching and mercerization process of cotton goods

Brief introduction to processing machinery: Jigger and Winch, Jet and Soft flow dyeing m/c, Padding Mangle. Pretreatment range (PTR), Continuous dyeing range (CDR), Cold Pad Batch (CPB) dyeing m/c, Role of stenter and VDR m/c in finishing process. Roller printing, Rotary printing m/c and digital printing m/c.

Theory of dyeing, Classification of dyes according to their mode of application, Dyeing Auxiliaries, Dyeing of cellulosic material with direct, reactive, vat and sulphur dyes. Dyeing of polyester with disperse dyes, difference between exhaust and continuous dyeing, Dyeing of P/C blends

Styles and methods of printing, Role and types of printing thickeners, Properties of thickeners, Printing auxiliaries, Pigment Printing, Printing faults and their remedies.

Role of finishing process in textile processing, Introduction to finishing, Classification of finishing - Mechanical and Chemical, Various types of finishing such as Calendaring, Milling, Sanforizing, Optical brightening agent (OBA), Flame retardant and water repellent finish.