Yarn Twist | Texhour

The cotton fibers have imparted a twist during spinning to bind them together and give the yarn strength. The twist is given by rotating the fiber strands in a clockwise or anti-clockwise direction. The amount of twist directly affects the strength of the yarn – generally, the higher the twist, the stronger the yarn. But after a point, the yarn will not take more twisting and will break.

Yarn Twist | Texhour
Yarn Twist

 

Yarn Twist:

The cotton fibers have imparted a twist during spinning to bind them together and give the yarn strength. The twist is given by rotating the fiber strands in a clockwise or anti-clockwise direction. 

The amount of twist directly affects the strength of the yarn – generally, the higher the twist, the stronger the yarn. But after a point, the yarn will not take more twisting and will break.

It also affects luster, handle (hand-feel), absorbency, abrasion resistance, surface characteristics and flexibility of the final fabric. Yarns intended for soft surfaces are given a low twist & called soft-twisted yarns. Yarns intended for crepe fabrics (where the surfaces are textured and crinkled) are given the maximum amount of twist.

 

                yarn twist

 

The direction of the twist is observed by holding the yarn in a vertical position and then observing the spiral. A spindle rotating clockwise will produce a Z twist yarn, while one rotating anti-clockwise will produce an S twist yarn.

All normal cotton yarns are in Z twist. S twist yarns have to be specially made.

The amount of twist is expressed in turns per unit length, usually tpi – ie turns per inch