Question 36 (Textile Engineering & Fibre Science)
Match the items in Group I with those in Group II.
|Group I||Group II|
|P||Ring spinning||1||Real twist, mechanical twisting, low fibre migration, aerodynamic drafting|
|Q||Rotor spinning||2||False twist, aerodynamic twisting, low fibre migration, roller drafting|
|R||Air-vortex spinning||3||Real twist, aerodynamic twisting, high fibre migration, roller drafting|
|S||Air-jet spinning||4||Real twist, aerodynamic twisting, high fibre migration, roller drafting|
|(A)||P-3, Q-2, R-1, S-4|
|(B)||P-4, Q-3, R-2, S-1|
|(C)||P-3, Q-1, R-4, S-2|
|(D)||P-3, Q-2, R-4, S-1|
Frequently Asked Questions | FAQs
What is the difference between vortex spinning and air jet spinning?
Vortex spinning and air jet spinning are two different methods of producing yarns in the textile industry. While both methods use high-speed air currents to twist and spin fibers into yarns, there are some key differences between the two.
The “rotor spinning,” is a method of producing yarns in which a rotating rotor is used to twist and wrap the fibers around a central core. As the rotor rotates, air currents generated by the rotor’s movement cause the fibers to separate and twist around the core. The resulting yarn has a spiral twist, which can be adjusted by controlling the rotor speed and air pressure. Vortex spinning is known for its high production speed and the ability to produce a wide range of yarn counts and fibers.
Air jet spinning, on the other hand, is a method of producing yarns in which a high-speed air current is used to twist and wrap fibers into yarns. In this method, fibers are fed through a nozzle or jet at a high velocity, and the air current generated by the jet twists and wraps the fibers into a yarn. The yarns produced by air jet spinning have a smoother surface and lower hairiness compared to vortex spun yarns. Air jet spinning is typically used for producing yarns made from synthetic fibers, such as polyester, and is known for its high productivity and low energy consumption.
In summary, while both vortex spinning and air jet spinning use high-speed air currents to spin fibers into yarns, vortex spinning uses a rotating rotor to twist and wrap fibers, while air jet spinning uses a high-speed air jet to twist and wrap fibers. The resulting yarns have different characteristics and are used in different applications in the textile industry.