TF - Textile Engineering And Fibre Science
Textile Fibres: Classification of textile fibres according to their nature and origin; general characteristics of textile fibres-their chemical and physical structures and their properties; essential characteristics of fibre forming polymers; uses of natural and man-made fibres; physical and chemical methods of fibre and blend identification and blend analysis.
Melt Spinning processes with special reference to polyamide and polyester fibres; wet and dry spinning of viscose and acrylic fibres; post spinning operations-drawing, heat setting, texturing- false twist and air-jet, tow-to-top conversion. Methods of investigating fibre structure e.g. X-ray diffraction, birefringence, optical
and electron microscopy, I.R. absorption, thermal methods; structure and morphology and principal natural and man-made fibres, mechanical properties of fibres, moisture sorption-in fibres; fibre structure and property correlation.
Textile Testing: Sampling techniques, sample size and sampling errors; measurement of fibre length, fineness, crimp, strength and reflectance; measurement of cotton fibre maturity ad trash content; HVI and AFIS for fibre testing. Measurement of yarn count, twist and hairiness; tensile testing of fibres, yarn and fabrics; evenness testing of slivers, rovings and yarns; testing equipment for measurement test methods of fabric properties like thickness, compressibility, air permeability, drape, crease recovery, tear strength bursting strength and abrasion resistance. Correlation analysis, significance tests and analysis of variance; frequency distributions and control charts.
Yarn Manufacture and Yarn Structure: Modern methods of opening, cleaning and blending of fibrous materials; the technology of carding with particular reference to modern developments; causes of irregularity introduced by drafting, the development of modern drafting systems; principles and techniques of preparing material for combing; recent development in combers; functions and synchronization of various mechanisms concerned with roving production; forces acting on yarn and traveller, ring and traveller designs; causes of end breakages; properties of doubles yarns; new methods of yarn production such as rotor spinning, air jet spinning and friction spinning.
Yarn diameter; specific volume, packing coefficient; twist-strength relationship; fibre orientation in yarn; fibre migration.
Fabric Manufacture and Fabric Structure: Principles of cheese and cone winding processes and machines; random and precision winding; package faults and their remedies; yarn clearers and tensioners; different systems of yarn splicing; features of modern cone winding machines; different types of warping creels; features of modern beam and sectional warping machines; different sizing systems, sizing of spun and filament yarns, modern sizing machines; principles of pirn winding processes and machines; primary and secondary motions of loom, effect of their settings and timings on fabric formation, fabric appearance and weaving performance; dobby and jacquard shedding; mechanics of weft insertion with shuttle; warp and weft stop motions, warp protection, weft replenishment; functional principles of weft insertion systems of shuttleless weaving machines, principles of multiphase and circular looms. Principles of weft and warp knitting; basic weft and warp knitted structures; classification, production and areas of application of nonwoven fabrics.
Basic woven fabric constructions and their derivatives; crepe, cord, terry, gauze, lino and double cloth constructions. Peirce's equations for fabric geometry; thickness, cover and maximum sett of woven fabrics
Textile Chemical Processing: Preparatory processes for natural-and and their blends; mercerization of cotton; machines for yarn and fabric mercerization.
Dyeing and printing of natural- and synthetic- fibre fabrics and their blends with different dye classes; dyeing and printing machines; styles of printing; fastness properties of dyed and printed textile materials.
Finishing of textile materials, wash and wear, durable press, soil release, water repellent, flame retardant and antistatic finishes; shrink-resistance finish for wool; heat setting of synthetic-fibre fabrics, finishing machines; energy efficient processes; pollution control.