AKTU Chemical Processing of Textiles I (BCT403) Syllabus PDF – B.Tech 2nd Year

Course Objectives

1. To acquire knowledge of fundamentals of singeing, desizing, scouring, bleaching, mercerisation and direct dyeing.
2. To identify technological involvement with appropriate techniques in singeing, desizing, scouring, bleaching, mercerisation and dyeing processes.
3. To formulate and apply technological knowledge in singeing, desizing, scouring, bleaching, mercerisation and dyeing processes in industry.
4. To make the chemical processes under control in singeing, desizing, scouring, bleaching, mercerisation and dyeing.
5. To demonstrate knowledge for project work and be helpful to higher studies in the field of singeing, desizing, scouring, bleaching, mercerisation and dyeing. Unit (1): Total lectures required = 12 Preparatory Process: Sequence of preparatory process prior to dyeing for natural & manmade fibre fabrics with special reference to cotton, wool, polyester and blends. Singeing: details of gas singeing process. Desizing: Objects of desizing, Mechanism of desizing. Various methods of industrial desizing: Hydrolytic enzymatic & oxidative method of desizing, Evaluation of efficiency of desizing. Unit (2): Total lectures required = 12 Scouring: Object of scouring, Scouring with alkali assisted desizing, eco-friendly scouring process. Inter-relation between desizing and scouring, Study of batch-wise & continuous methods of scouring. Scouring machines for batch process of cotton and blended fabric. Evaluation of efficiency of scouring Unit (3): Total lectures required = 12 Bleaching: Objects of bleaching, Introduction to bleaching agents like sodium hypochlorite ,hydrogen peroxide & per-acetic acid, Bleaching of cotton, polyester & its blends, Batch-wise & continuous machinery for bleaching, Bleaching of wool ,silk, Concept of AOX. Bleaching process for compliance of EU norms. Evaluation of efficiency of bleaching. Continuous scouring and bleaching: Pre-treatment Range Unit (4): Total lectures required = 12 Mercerization: Introduction & objects of mercerization, Effect of mercerization on structure of cellulose, Machinery used for yarn, woven and knit fabrics, Concept of hot mercerization & liquid ammonia mercerization, mercerization machines: chain mercerization and chainless mercerization. testing methods to evaluate efficiency of mercerization like Barium Activity, Number, Axial Ratio & Luster index. Unit (5): Total lectures required = 12 Direct Dyes: Theory of dyeing, dynamic equilibrium, Generalised formula of Direct dyes: Classification of direct dyes; Mechanism of Direct dyes and procedure for application of direct dyes; dye-fibre bond; effect of different process parameters (e.g. temp, time, pH) & role of various additives in dyeing process; fastness properties of direct dyes; industrial after treatments for direct dyes.

Reference Books

1. Dyeing & Chemical technology of Textile fibres by E.R. Trotman.
2. Chemical Technology in the Pre-Treatment process of Textile by Dr S. R. Karmakar.
3. Technology of Bleaching Vol. IV, by Dr. V.A. Shenai.
4. Technology of Bleaching by J.T Marsh
5. Chemistry of Dyes and principles of Dyeing by Dr. V.A. Shenai.
6. Technology of Dyeing by Dr. V.A. Shenai

Course Outcomes

At the end of the course students will be able to:

1. Acquire knowledge of fundamentals of singeing, desizing, scouring, bleaching, mercerisation and direct dyeing.
2. Identify technological involvement with appropriate techniques in singeing, desizing, scouring, bleaching, mercerisation and dyeing processes.
3. Formulate and apply technological knowledge in singeing, desizing, scouring, bleaching, mercerisation and dyeing processes in industry.
4. Make the chemical processes under control in singeing, desizing, scouring, bleaching, mercerisation and dyeing.
5. Demonstrate knowledge for project work and be helpful to higher studies in the field of singeing, desizing, scouring, bleaching, mercerisation and dyeing.