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 |
|
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
|
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