What is Ring spinning?
A process of spinning in which the yarn is twisted and drawn while passing through a small metal device travelling rapidly around a ring in the operation of winding the yarn onto a bobbin.
What is the Rotor spinning?
Rotor spinning (a type of open-end spinning), in which fibres are detached from the card sliver and twisted, within a rotor, as they are joined to the end of the yarn.
What is Air-jet spinning?
Air-jet spinning is a pneumatic method which consists of passing a drafted strand of fibres through one or two fluid nozzles located between the front roller of a drafting system and a take up a device. This process employs an air-jet to rotate the fibre strands and twist them into a yarn.
What is Friction spinning?
Friction spinning is an ‘open-end’ or a ‘core-type’ form of spinning (or both), in which the yarn formation takes place with the aid of frictional forces in the spinning zone. Friction- spun yarns are characterized by a distinct wrapper surface.
Characteristics of different spinning methods.
|
Spinning
methods |
Actual
twist –insertion rate per minute |
System
limited by |
Delivery
speed (m/min) |
|
|
|
|
Twist-insertion rate
|
Drafting & fibre transport speed
|
|
|
Ring
|
15,000 – 25, 000
|
Yes
|
No
|
20 – 30
|
|
Rotor
|
80,000 – 150,000
|
Yes
|
Partly
|
100 – 300
|
|
Air-jet
|
150,000 – 250,000
|
No
|
Yes
|
150 – 450
|
|
Friction
|
200,000 – 300,000
|
No
|
Yes
|
150 – 400
|
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