Yarn has sufficient tensile strength to withstand the stresses of preparation and fabric manufacture. The main function of twist is to give coherence to the yarn i.e. twist provide strength to the yarn. The cohesion arises mainly from the twist, which presses the fibres together, as the stretching forces are applied & thus, developing friction between adjacent fibres. The equipment used for determination of twists of a yarn is known as a Twist Tester.
A specially designed Twist Tester is highly beneficial in checking twists in a Single Yarn. The strength of a yarn and other properties of the fabric depend to a great extent on the amount of twist given to it. Thus, accurate determination of this factor is of prime importance in assessing the quality of any yarn. The amount of twist given to a yarn is usually determined by untwisting a known length of yarn and finding the number of rotations of one of its ends relative to the other, which remove the twists completely. The important feature is that it undergoes inspection and conformance certifications. It is useful in testing the effectiveness of drilling and shaping machines.
Superb Product! Thanks for offering the yarn twist tester at affordable cost. Any layman in my industry can operate the device easily because of the user-friendly features and the credit goes to Presto.