What is CSP in yarns?
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 CV in yarn?
Coefficient of mass Variation (CV%):
The coefficient of mass variation CV % is the ratio of standard deviation of mass variation divided by average mass variation. The higher the CV value is the more irregular the yarn.
What is the meaning of IPI in yarn?
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 yarn lea strength?
The Lea strength of yarn is one of the major properties on which the suitability of yarn for its ultimate end use depends. It is the standard method of measuring the strength of the yarn. The frictional forces rendered to the yarn in the lea test reduce the sensitivity of the test to detect weak places in the yarn.
Whats is CSP?
A communications service providers (CSP) offers telecommunications services or some combination of information and media services, content, entertainment and application services over networks, leveraging the network infrastructure as a rich, functional platform.
What is CV% of count?
1.1 Definition of the relative count – Count C.V. The relative count gives the mass deviation in % of the whole test length of each test sample as compared to the average mass of all samples. This value is an indication of relative count deviation (CV). The lower the value the better.
How do you control yarn count on a CV?
So control of with in CV should be focus at (a) D/F U % (b) stretch at S/F Control of sliver U% , U% Check by 10 mm layer cut. Depending upon draft yarn spun is 40 mtrs- 160 mm. so directly affect CV within U % of 2nd passage D/F is 3-5% & first – 5-7% Less U% is 3 passage but hooks at R/F is not favourable.
How do you calculate CV?
The formula for the coefficient of variation is: Coefficient of Variation = (Standard Deviation / Mean) * 100.
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 yarn evenness?
YARN EVENNESS Yarn evenness is a measure of the level of variation in yarn diameter along its length. … A yarn with poor evenness will have thick and thin places along yarn length, while an even yarn will have little variation in mass or diameter along length.
What is CV% in textile?
2. Yarn Unevenness • Yarn unevenness deals with the variation in yarn fineness. This is the property, commonly measured as the variation in mass per unit length along the yarn. … It is a basic and important one, since it can influence so many other properties of the yarn and of fabric made from it.
How faults are generated in yarn?
POSSIBLE REASONS OF FAULT
Bad condition of carding, blow room, trash in yarn. Fluffs foreign matters, dirty drafting zones, neps. Ring front zone dirty, fly waste in trumpet. Fibres damaged in process, spindles without aprons.
How is Lea strength calculated?
4. Calculation: Lea Strength = 79.32lbs/lea [120yards=1lea] C.S.P (CountStrength product) = Lea strength × Yarn Count =79.32×30 =2379.6 (C.S.P of given sample) Result: The strength of Cotton yarn = 79.32lbs/lea.
How do you measure yarn strength?
Product strength score or CLSP
In this case, quality is usually expressed in pounds-force (lbf). The yarn strength is also measured in pounds, then multiplied by the English cotton yarn score to finally obtain the product strength score or CLSP.
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).