Textile Classes

In belows, I have tried my best to discuss about the basic things of Yarn Twist.

Yarn Twist:

Yarn Twist is the measure of the spiral given to a yarn in order to hold the constituent fibres or threads together.
According to textile institute “Twist is the spiral disposition of the components of a thread which is usually the result of the relative rotation of the two ends”.

Types of Yarn Twist:

According to direction of twist, it is of two types: -
1. S- Twist
2. Z- Twist.

S- Twist: A single yarn has S twist if, when it is held in the vertical position. The fibres inclined to the axis of the yarn conform in the direction by slope to the central portion of the letter “S”.

Z-Twist: A single yarn Z Twist if, when it is held in the vertical position, the fibres inclined to the axis of the yarn conform in the direction of slope to the central portion of the letter “Z”.

Amount of Yarn Twist:

The amount of twist in a thread means the number of turns of twist per unit length in the twisted condition.
If “n” be the number of turns of twist in “l”( small l) inch of yarn, then the amount of twist will be T= n/l .

Related Topics:

1. Logic of Twist Contraction & Retraction factor of Textile Yarn
2. What are the assumptions of an Ideal Yarn Properties?
3. What is Yarn Geometry, Classification & Designation
4. Yarn Spinning Classes | How many types a yarn has?
5. What types of warp yarn should be used in Weaving?

Quality, Yarn