1. Leather Finishing Material and Auxiliaries
2. Elective-1
3. Theory of leather supplements & Synthetics
4. Instrumentation and Process Control
5. Leather Product Technology-II
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Leather Technology

Seventh Semester

Leather Finishing Material and Auxiliaries
Module-1

Pigments ( 8 Lectures )

Inorganic and Organic Pigments, Preparation of Pigments, Methods of Prepation of Pigments, Aqueous Pigment Paste, Properties required in Pigments.

Module-2

Principles of Finishing, Finish Formulation and their Application ( 6 Lectures )

Definition, Aim, Film- Formalation mechanism, Properties of films such as transparency, Gloss and resistance to heat, light and solvent, Role is dispersion and stability – Requirement in multiple coat technique- Single coat, Composition and methods of application like spraying, Curtain coating, Roller coating etc, Cationic finishes and their relative merits.

Module-3

( 6 Lectures )

Chemistry and Preparation of Nitrocellulose, lacquers, lacuuer emulsion, Coloured lacquers, Wax emulsions, Silicone emlsion.

Module-4

( 6 Lectures )

Chemistry and Properties required of Synthetic Polymers, Impregnating agents, Binders, Chemistry of Polyurethane lacquers.

Module-5

( 6 Lectures )

Chemistry and Mechanism of Plasticization, Internal and External Plasticizers.
Definition of Water proofing, Theory of water Proofing, Chemistry & Mechanism involved in water proofing.

Module-6

( 6 Lectures )

Upgradation technologies in finishing.
General introduction to addition, condensation, Natural polymer, Caesin, Cellulose

Elective-1

1. An Overview

Types of tannery available in India. Their nature and composition. Present methods of collection and utilization. Recovery of salt from the same. Its treatment and re-use. Theoretical and practical aspects of recovery of chrome, Protein and biogas from the tannery waste.

2. Beam-house Products

Recovery of fat, proteins, chemicals and glue and their use. Pet Treats, finished split, gloves, washers etc.

3. Leather shavings and Trimmings

Chemistry and Processing into hydrolysates, glue gelatin, syntans, fertrilizers, processing into leather and acoustic boards.

4. Nature of Tannery Hair

Chemistry and processing into protein meal hydrolysates and their uses – Conversion into felts and other utility products.

5. Process Studies

Glue and protein meal from tannery fleshing, Quality evaluation of glue and protein meal, pet treats limited stock recovery of salt from used salt – Analytical procedures of protein meals.

Theory of Leather Supplement & Synthetics

( 4 Lectures )

Chemistry of the most common Polymeric materials used in leather industry as supplements and some basic concept about this.

( 10 Lectures )

Concept of a macromolecule, natural & synthetics polymer, modes of polymerization, radical, condensation, stereo regular polymerization, polymerization kinetics, mechanism, anionic and cationic polymerization.

( 12 Lectures )

Manufacture of industrially important polymer for plastics, fibres and elastomer, polyethylene, polypropylene, polyvinyl, chloride, polyvinyl, alcohol, polyacrylonitrile, polyurethane, fluoro – carbon polymer, epoxy resins, polyamides, polyesters, alkyd resin, silicon polymers, cellulosics, polyacrylates, polyurethanes and their common applications.

( 8 lectures )

Testing of Polymers by different methode like, Mechanical and thermal testing. and Polymer and Rubber industries in India.

( 10 Lectures )

Manufacture of Rubber and Synthetic rubber, Natural rubber processing and vulcanizing synthetic elastomers, butadiene copolymer, Polyisoprene, Polybutadiene, Thermosetting, Thermoplastic.

Instrumentation and Process Control

Absolute and secondary instruments. Types of secondary instruments, Essentials of indicating instruments, Constructional details of indicating instruments. Principle of induction type instruments –shaded pole method and two pole methods. Compensation for frequency and temperature errors. Induction type voltmeter . Ammeter , advantage and disadvantages. Inductions type single phase watt hour meter, their errors and remedies . Numerical. Wattmeter, Power fractometer, etc. Characteristics of instruments Elements of generalized measuring system ,static calibration, accuracy sensitivity , responsibilities static errors dead zone .drift in measuring instruments and measuring Rotameter. Study the different parts and working of pressure switch. Study the different parts of an indicating instrument. Study thedifferent parts and their working of single phase induction type watt-hour meter. Visit to a microprocessor controlled dairy plant.

Leather Product Technology-II
Module-1

( 5 lectures )

Historical evolution of Garment and Goods styling, Seasonal cultural and geographical influences on fashion, Friends in fashion concept, Colour and human psychology.

Module-2

( 9 Lectures )

Classification of Leather Goods and Garments, Selection of materials, Grading and assortment of Leathers for leather goods and garments. Property requirement for leather and lining materials. Accessories for leather goods and garments comparison between manual and machine cutting, Maintenance of knives and tools, clicking machines mechanical, Hydraulic/Pneumatic pattern interlocking/nesting for material optimization Assembly and sticking (Closing).

Module-3

( 9 Lectures )

Different types of sewing machines (Flat bed, inclined bed, special type machines), Feed mechanisms, Various types of assembly techniques for leather goods and garments.

Module-4

Pattern Designing ( 9 Lectures )

Basic design development, Measurements/Sizing chart for Man, Women and Children, Adaptation of stages to basic blocks. Pattern development, grading. Application of CAD for leather goods and garments design and production. Feasibility reports for leather goods and garments production. Machinery requirement/plant layout, process scheduling and line balancing, Quality control measures. Packaging methods and practices. Costing, pricing and marketing procedures for domestic and international markets.