AKTU Chemical Processing of Textiles - II (BCT502) Syllabus PDF – B.Tech 3rd Year

Course Objectives

Objective of the course is to learn, understand, identify dyeing process & finishing process and apply dyes: azoic dyes, sulphur dyes, vat dyes, reactive dyes, disperse dyes to textiles and apply finishing chemicals to textiles.

Azoic Colour: Basic principle of application of Azoic Colour; Naphtholation process, role of additives and effect of process parameters on naphtholation process. Classification of naphthols based on substantivity. Basic chemistry in Diazotisation process, Procedure for diazotisation; Stabilization of diazonism salts. Development of Shades- Coupling, Basic Chemistry involved in coupling. Fastness properties of Azoic Colours.

Sulphur Dyes: Chemical nature of sulphur dyes; Classification of sulphur dyes, Process of application of sulphur dyes & mechanism of dyeing, Role of additives and process parameters in sulphur dyeing. Fastness properties of sulphur dyes.

Vat Dyes: General formula of vat dyes, classification of vat dyes; Process of application of vat dyes, mechanism of vat dyeing; oxidation process; Role of additives and process parameters in vat dyeing.

Sollubilised Vat dyes. Dyeing with solubilizsed vat dyes. Fastness properties of vat dyes.

Reactive Dyes: General formula of reactive dyes. Chemical nature of reactive dyes;

Classification of reactive dyes; Process of application of various kind of reactive dyes & dyeing mechanism; Role of additive and effect of process parameter in reactive dyeing.

General properties of reactive dyes.

Disperse Dyes: Chemical nature of disperse dyes, application of disperse dyes on polyester; dyeing mechanism; Role of additives & effect of process parameters on disperse dyeing.

Optical whitening agents, application to polyester and cotton.

TEXTILE FINISHING Purpose of finishing; Type of finishing, Permanent & Temporary; Mechanical & Chemical finishing. Chemical finishing- Anticrease finish (Using DMU & DMDHEU) Flame retardant finish, Water repellent & Water proofing finish, Softening of fabric, Anti soiling finish.

Brief description of different type of finishing machine; Stenter, Sanforizing machine, Calendering machine etc.

Reference Books

1. Dyeing & Chemical Technology of Textile fibres by E.R. Trotman.
2. Chemical Technology of fibrous material by F..Sadov.
3. Chemistry of Dyes and principles of Dyeing by Dr. V.A. Shenai.
4. Technology of Dyeing by Dr. V.A. Shenai
5. Chemical Processing of Synthetic fibres by Dr. K.V. Datye & A.A. Vaidya
6. The Dyeing of Cellulose fibres by Clifford Preston.
7. Technology of Finishing – Vol. X by Dr. V.A. Shenai.
8. Introduction to Textile finishing by J.T. Marsh

Course Outcomes

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

1. Knowledge of fundamentals of azoic dyes, sulphur dyes, vat dyes, reactive dyes, disperse dyes and textile finishing.
2. Understanding of technological involvement with appropriate techniques in azoic dyes, sulphur dyes, vat dyes, reactive dyes, disperse dyes and textile finishing.
3. Knowledge of application technique of azoic dyes, sulphur dyes, vat dyes, reactive dyes, disperse dyes and textile finishing process in industry.
4. Capacity to make the chemical processes under control in azoic dyes, sulphur dyes, vat dyes, reactive dyes, disperse dyes and textile finishing.
5. Understanding for doing project work and aptitude for higher studies in the field of azoic dyes, sulphur dyes, vat dyes, reactive dyes, disperse dyes and textile finishing.