Yarn twisting is the method used to make yarn from fiber. The number of turns about the axis per unit of length in yarn or another textile strand.
If you take a bunch of fibers and try to start turning those fibers along the yarn axis, that is called a twist. It is expressed several turns in unit lengths and the other thing is called helical and spiritual. The Helical or Spiritual configuration induced by turning a strand about its longitudinal axis
The twist is a very very important part apart from the count because if you keep increasing the twist it might be possible for the yarn becomes very stiff or it may be a break. The twist is used to improve the strength and compactness
Too much twist or turning of the fibers should be avoided, for the knitting point of view twist is extremely important. If you use highly twisted yarn there might be a possibility that it may not bend properly and the loop length geometry will be destroyed
Twist as well as the count is extremely critical and it should be in a certain range so that it can run smoothly on the machine
And the movement you start turning it, the fiber starts arranging the spiral form, and the length of the yarn will also reduce, so this is how the yarn twist influences the yarn properties. It makes yarn a little bit stiffer and it will also result in shrinkage.
Types of Yarn Twisting Methords
There are 2 terms which commonly used ,which is S twisted and Z twisted
The nature of the spirality along the S direction means the yarn is twisted in a clockwise direction is called S twisted. When the yarn is twisted in an anti-clock direction called Z twist, the spirality becomes reverse. Both S twist yarn and Z twist yarn have a significant influence on the fabric properties
Yarn Twisting in a Plied Yarn or Cord Yarn
Twisting plied yarn to make cord, is called twist in a plied yarn. In a twist in the plied yarn, the twist which has to be imparted, the direction must be the opposite of the initial twist
If you have S twisted yarn when you are combining these is equal to twisted plied yarn, we need to apply Z twist and when you are combining Z twisted plied yarn then you have to impart S twist direction
4/60s
It indicates 4 plies of yarn of 60s count each. So 4 indicates the number of single-ply yarn and 60 indicates the count
2/2/60s
When you have two bars, the first2 indicates you are combining two 2 ply yarn, so 2/60 you are combining 2 single yarn to make 2 ply yarn and then you are taking that two-ply yarn to make a cord by giving different twist, so a cord made by 2 ply yarn of two 60s
The high twist in yarn results in a harder fabric feel, Good abrasion and pilling resistance, and poor bending characteristics
