Main Component of textile study | textile technology | textile physics

Textile raw materials
Classification of fibers
Engineering approach to fibers, yarns and fabrics
Importance of textile structures for Engineers
Physical and Mechanical properties of various fibers
Textile properties developed by drawing
Design and other fiber attributes
Essential and desirable properties of textile fibers
Influence of fiber fineness
Miscellaneous properties of fibers
Flexural rigidity of textile fibers
Fiber migration
Measurement of fiber migration
Definition of yarn
Factors affecting yarn strength
Parameters affecting physical properties of yarn
Classification of yarn
Classification of yarn based on physical and performance characteristics
Description of yarn
Idealizes structural diagram of some yarns
Continuous filament and staple yarn structure
Fundamental structural features of yarn
Yarn designation
Relative consumption of yarn
Sewing thread
Thread sizes
Thread selection
Importance of twist
Types and direction of twist
Bedding or nesting                                                                                                                           Determination of twist
Twist effects
Angle of twist and twist factor
Effects of twist on yarn strength, extensibility and luster
Geometry of twisted yarn
Idealized twisted yarn geometry
Various comments on idealize yarn geometry
Yarn size and twist multiplier
Optimum twist factor
Fiber packing in yarn
Open packing of yarn
Hexagonal close packing of yarn
Real yarn packing
Concentrating and disturbing factors
Observed packing of fibers in real yarn
Twist in relation to yarn bending
Relation among twist angle, twist factor and yarn count
Equation for yarn diameter
Equation for specific volume of yarn
Show that d=4.44 x 10^-6ÖTex / Density
Relation among twist, diameter and twist angle
Estimation of Schwarz’s constant
Yarn luster
Twist contraction and twist retraction
Limit of twist
Contraction factor and retraction factor
Derivation of expression for prediction of filament strain
Limitations of Platt’s low strain equation
Geometry
Cloth geometry
Reasons for studying cloth geometry
Weave and weave notation
Crimp
Warp crimp and weft crimp calculation
Crimp percentage and take up percentage
Distinction between crimp % (C) and take-up %(T)
Relationship between crimp (%) and take-up (%)
Pierce’s Flexible thread model
Importance of crimp on fabric properties
Fabric behavior during tensile testing
Measurement of crimp
Principles of edged crimped yarn
Crimp measuring instrument
Pierce’s  model for plain weave
Equation for pick spacing (P2) and end spacing (P1)
Equation for maximum warp yarn displacement (h1) and weft yarn displacement (h2)
Dependence of crimp percentage
Crimp interchange
quation for crimp  interchange
Warp and weft yarn jamming
Equation for warp and weft yarn jamming
Biaxial, tri-axial and balanced structure
Equation for rigid thread model
Why rigid tread model was introduced
Effect of yarn crimp on fabric properties
Concept of similar cloth
Cover factor
Yarn and fabric strength relationship
Handle, drape and shear
Measurement of drape ability
Some tensile properties of fabric
Electrical properties of textiles
Dielectric properties of textiles
Polarization and related effects
Power factor and dissipation factor
Measurement of dielectric properties
Preparation of a test condenser
Measurement of impedance by Schering’s bridge and resonance method
Factors influencing dielectric properties of textiles
Electrical resistance of textiles
Conductors, semiconductors and insulators
Conduction of electricity in textiles
Influence of dielectric constant on ions
Normal, excited and ionized atom
Electrical resistance of textiles
Measurement of resistances of textiles
Specimen preparation for measuring resistances of textiles
Influence of various factors on resistance of textiles
Static charge
Explanation of static phenomenon
Theories of static charge
Measurement of charge in slivers by Faraday’s cylinder and Medley’s method
Generation of static charge in polymers
Amphoteric behavior of keratin
Piezo and pyro electric charges
Leakage of static charges in air
Leakage of static charges in perfect insulators, moderate insulators, & conductors
Problems of static charges in textile mills
Minimization of static charges in textile mills
The present view about static charges in textiles

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