What is Uster evenness tester?
Textile Testing & Quality Control-1. The optical method measures the variations in diameter of a yarn and not in its mass. The instrument an infra-red transmitter and two identical receivers. The yarn passes at speed through one of the beams, blocking a portion of the light to the measuring receiver.
What is Uster in yarn?
The USTER® STATISTICS are the global benchmarking tool based on the global collection and testing of fiber, sliver, roving, and yarn samples that have been produced in every part of the world. The STATISTICS were first introduced in 1957 and are periodically updated.
What is Uster Classimat?
The next-generation USTER® CLASSIMAT 5 features innovative and powerful technology for defect classification and prevention. It enables both yarn producers and users to achieve significant improvements in quality consistency across an extended range of parameters.
What is USTER TESTER 6?
Uster Tester 6 is the only yarn testing instrument on the market with the option to obtain Twist and Twist variation (Tu) data during yarn testing, at a speed of 800 m/min. This information enables spinning mills to react quickly to identify performance gaps such as low-speed spindles.
Why do we use Uster evenness tester?
Mainly two methods are used for measuring yarn irregularity. Capacitive method/Uster evenness tester: So if yarn passes through the capacitor plate, the current flow change with respect to thickness/mass of the yarn, thick thin places. This signal then processed by digital processor to get mass variation.
What is principle for testing hairiness?
The measuring principle is based on evaluation with diffracted light. Hairiness value H is defined as the total length of all fibre ends sticking out in cm, related to a yarn section of 1cm in length. Hairiness is counted on both sides of the yarn silhouette. As a result, tested values have a rather high reliability.
What is CSP in yarn?
C.S.P is the product of English count and strength of yarn in pound. i.e. C.S.P = Strength of yarn in pound x Count in English system. Again, English count is the no. of hanks in 840 yards length per 1 pound weight of yarn.
What is CV in yarn?
The variation of the yarn count (CV count) is the variation from one bobbin to the other. In general the lower the C.V.% the better is the measured value of the yarn.
What is Uster Quantum?
Uster Quantum 4.0 combines capacitive and optical yarn clearing. This all-in-one solution offers full flexibility for various yarns and changing conditions.
What is the use of yarn Classimat?
The USTER CLASSIMAT QUANTUM can be used not only as a tool in order to examine the yarns to be purchased for remaining disturbing thick places, thin places and foreign fibres but also as a sophisticated classifying system which can help the user to determine and set his own yarn quality standards.
What is high volume instrument in textile testing?
A testing machine capable of measuring many cotton fiber properties including length, uniformity, micronaire/fineness, strength, color, etc.
How do you test your evenness?
Divide Shannon’s diversity index H by natural logarithm of species richness ln(S) to calculate the species evenness. In the example, 0.707 divided by 1.099 equals 0.64. Note that species evenness ranges from zero to one, with zero signifying no evenness and one, a complete evenness.