Unit 1 Requirements of Alternative spinning processes other than ring spinning. Possibilities for

• using the various spinning processes
• Basic principle of open end spinning

Unit 2 Rotor Spinning Technology –

10 lecture hours

• Ring spinning limitations as compared to rotor system
• Raw material requirement for rotor spinning
• Mechanism of yarn formation in rotor spinning: Assembling of fibers
• Integration of fibers into the yarn
• Twist insertion
• Rotor yarn structure: Fiber orientation and extent
• Fiber migration
• Twist structure
• Packing of fibers in yarn
• Various parameters influencing the yarn structure and quality: Opening roller wire profile and speed
• Rotor speed
• Rotor diameter
• Rotor groove
• Side wall angle
• Draw off nozzle
• Rotor yarn characteristics
• Developments in rotor drives
• Production of fine rotor yarns
• manmade yarns and blends
• speciality yarns etc, Limitations and problems in rotor spinning systems
• Recent technological developments in spinning and processing of rotor spun yarns

Unit 3 Air Jet Spinning –

7 lecture hours

• Working Principle of air jet spinning
• Raw material preparation for air jet spinning
• Principles of operation of MJS, MTS and MVS systems
• Difference between air jet spun and vortex spun yarn structures
• Process variables and machine parameters affecting the product quality
• Yarn properties
• limitations and some of the important applications

Unit 4 Friction Spinning –

• Operating principle of friction spinning
• Raw material requirement
• Mechanism of yarn formation in friction spinning
• Working principle of different friction spinning systems like DREF1
• DREF3000 along with technical 7 Subject Code: 3162908 w.e.f