How do you calculate CSP of yarn?

Theory: 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.

How do you measure yarn count?

The indirect system measures the length of a consistent weight of yarn, with a higher yarn count indicating a finer yarn. The direct system is calculated with the formula N = (W/l) / (L/w). The indirect system uses the formula: N = (L/w) / (W/l).

How do you calculate yarn for a CV?

The Coefficient of Variation (CV) is the standard Deviation (SD) expressed as a percentage of the mean CV % = (SD ÷ mean) x 100 • Each process in a spinning mill contributes a part to the evenness.

How is yarn IPI calculated?

The imperfection index (IPI) is the sum of yarn thin places/ km (-50%), thick places/km (+50%) and neps/km (+200%) per kilometer of tested yarn for ring spun yarn [2, 59] .

What is CV count 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.

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What is yarn size?

The yarn size is a measurement used for the number of 840yd hanks per pound and is many times also referred to as the spun size. The yarn size generally includes both the yarn size and number of ply. Examples include: 46/2 representing 46’s cotton count – 2 ply.

What is the meaning of CSP of yarn?

Theory: 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.

What is yarn irregularity?

The irregularity or unevenness of a yarn is commonly defined as the variation in fineness along its length and more appropriately as the variation in mass per unit length along the yam’. It is expressed as U% or CV%.

What is unevenness of yarn?

unevenness is a measure of variation in weight per unit length of the yarn or the variation in thickness of the yarn. Uster measures the yarn unevenness by a capacitive method.

What is Uster percentage?

USTER % Uster Eveness in % (U%) Uster% (U%) is a measure of unevenness of yarn. Actually, this is a measure of variation in weight (in gms) of approximately 1 cm. … U%, the statistical value representing the percentage variation of a yarn. Lower the value the better the yarn, because less imperfections exist in the yarn.

What is CSP in cotton 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.

What is IPI in textile?

IPI stands for Imperfection Index of Yarns. Imperfections is the description for thin, thick places and neps in 1000m of yarn. Evenness Tester is required to calculate the IPI of yarns with the results of different yarn evenness parameters.

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What is periodic fault?

The purpose of periodic yarn fault detection system was to identify defective part in the machine. This system is suitable for identifying the source of periodic fault on the machine.

What is RKM in yarn?

RKM is abbreviation of Resistance per kilometer. It is an important yarn quality parameter without measurement units. It is calculated from the data of single yarn strength tests performed on manual or automatic single yarn testing installations, for example Uster Tensorapid 3 or Tensojet.

What are yarn parameters?

Table: Showing the quality parameter of yarn

Parameters 30/1 cotton combed 30/1 cotton carded
Neps (+200%) 38-47 140-175
Hairiness 4.0-4.4 4.75-5.1
Tenacity (CN/tex) 21.8-22.6 16.7-17.6
Elongation 6.7-6.9 7.3-7.08

What is yarn specification?

‘Count’ is widely used term in garment industry when it comes to defining fabric construction and yarn specification (weight per unit length or length per unit weight) those are made using staple fibre like cotton. … It means that the number of yarns of 840 yards length required weighing one pound.

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