Abdel-salam 1972, in his research work noted that short fibers
had a negative effect on the yarn unevenness values.
Yarn nep count showed inversed trend compared to yarn C.V.%
being higher in Giza 85 yarns than in Upland cotton yarns. Moreover, nep count
increased as the percentage of Giza 85 increased in the blend.
Open end yarns showed lower number of neps compared with
ring spun yarns. Moreover, the coarse counts 25s open end and 30s ring showed
lower number of neps compared to the finer ones, 35s open end and 40s ring
yarns.
Generally, open-end spun yarns have a coefficient of
variation value lower than that ring spun yarns. The improvement in unevenness
of open-end spun yarns is generally ascribed to the higher number of doublings
taking place inside the rotor.
The overall picture of the data presented in Tables 4-7,
indicated that it is possible to blend up to 50% of Giza 85 lint with 50% Greek
or Sudanese cottons without any pronounced decrease
in lea count strength product, single yarn strength and unevenness values
weather spun at open-end and ring spinning at different yarn counts under study.
Table 4. Mechanical
properties for O-E yarns of Giza 85/Greek blends
|
|
25 Ne
|
35 Ne
|
|
LCSP
|
Yarn tenacity
(cN/Tex)
|
Yarn elongation (%)
|
LCSP
|
Yarn tenacity
(cN/Tex)
|
Yarn elongation (%)
|
|
Egyptian cotton/Upland Greek blends
|
|
A
|
2100
|
16.56
|
7.3
|
2015
|
15.74
|
7.1
|
|
B
|
1965
|
15.24
|
7.6
|
1940
|
14.92
|
6.8
|
|
C
|
1875
|
14.64
|
7.1
|
1830
|
14.33
|
6.6
|
|
D
|
1800
|
13.10
|
6.8
|
1795
|
13.00
|
6.8
|
|
E
|
1660
|
12.65
|
6.7
|
1650
|
12.23
|
6.5
|
|
L.S.D at 0.05% level
|
49.08
|
1.15
|
0.14
|
50.87
|
1.13
|
0.1
|
Table 5. Mechanical
properties for O-E yarns of Giza 85/Acala blends
|
|
25 Ne
|
35 Ne
|
|
LCSP
|
Yarn tenacity
(cN/Tex)
|
Yarn elongation (%)
|
LCSP
|
Yarn tenacity
(cN/Tex)
|
Yarn elongation (%)
|
|
Egyptian cotton/Acala Sudanese blends
|
|
F
|
2100
|
16.57
|
7.3
|
2015
|
15.71
|
7.2
|
|
G
|
1935
|
14.45
|
7.1
|
1930
|
14.35
|
6.8
|
|
H
|
1855
|
13.43
|
6.5
|
1815
|
13.25
|
6.4
|
|
I
|
1750
|
13.00
|
6.1
|
1700
|
12.24
|
6.1
|
|
J
|
1600
|
12.17
|
6.7
|
1550
|
11.16
|
6.4
|
|
L.S.D at 0.05% level
|
56.18
|
1.42
|
0.12
|
49.88
|
1.65
|
0.13
|
Table 6. Mechanical
properties for ring yarns Giza Giza 85/Greek blends
|
|
30 Ne
|
40 Ne
|
|
LCSP
|
Yarn tenacity
(cN/Tex)
|
Yarn elongation (%)
|
LCSP
|
Yarn tenacity
(cN/Tex)
|
Yarn elongation (%)
|
|
Egyptian cotton/Upland Greek blends
|
|
A
|
2880
|
20.65
|
6.4
|
2655
|
19.65
|
6.3
|
|
B
|
2685
|
19.10
|
6.3
|
2480
|
18.11
|
6.3
|
|
C
|
2535
|
17.65
|
6.3
|
2360
|
16.76
|
6.3
|
|
D
|
2310
|
16.15
|
6.3
|
2035
|
15.13
|
6.3
|
|
E
|
2135
|
14.64
|
6.2
|
1875
|
14.15
|
6.3
|
|
L.S.D at 0.05% level
|
65.12
|
1.37
|
N.S.*
|
64.43
|
2.15
|
N.S.
|
N.S. : non significant
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