Properties of Cotton Yarn

Yarn properties:

The properties of cotton spun yarn are mainly depends on fiber quality, amount of twist insertion and different process parameters. Normally good quality yarn is produced from good fiber and twist plays vital role in strength and elongation of yarn. Up to a certain limit, higher amount of twist ensures high strength and vice versa. Unevenness, imperfection and hairiness of yarn depend on fiber quality and process parameter. The properties of 30/1 Ne cotton carded and combed is given below:

 

Fig: Different types of yarn

Properties of cotton yarn:

Quality parameters	Carded yarn	Combed yarn
Nominal count (Ne)	30	30
Actual count	29.7-30.3	29.8-30.2
Count CV%	0.7-1.5	0.5-1.2
Yarn TPI	18-21	18-21
C.S.P.	1800-2100	2200-2400
Tenacity (gm/tex)	10-14	12-17
Elongation %	4-6	4-6
Uster U%	10-12	8-10
Uster CV%	11.25-15.4	9.75-12.5
Thin/Km (-50%)	10-30	1-10
Thick/Km (+50%)	20-60	10-30
Neps/Km (+200%)	100-300	20-80
Hairiness	4-6	3-5
CV of Hairiness	4-5	4-5

Normally combed yarn is better than card yarn for its processing sequence, which ensures very less amount of short fiber in the fiber, from which combed yarn is manufactured.
 
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