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Table 1 Technological indicators of two-layer knitted fabrics of a newBog'liq Italy Econference Series Nov 2023 packageTable 1 Technological indicators of two-layer knitted fabrics of a new
structure.
Indicators
Options
I
II
III
IV
V
VI
Thread type and linear
density, tex
Front layer
PAN 30 tex
х 2, 100%
Back layerort
Ring step A, mm
Front layer
1,66
1,78
2,2
1,92
1,66
1,56/1,47
Back layerort
1,66
2,0
3,1
3,8
1,43
1,43
The height of the ring
row is V, mm
Front layer
1,25
1,0
1,1
1,35
0,9
1,13/2,9
Back layerort
1,25
1,78
2,2
1,92
1,0
1,1
The density of rings in
horizontal, Rg, Ring
Front layer
30
28
23
26
30
32/34
Back layerort
30
25
16
13
35
35
The density of rings in
the vertical Rv, Ring
Front layer
40
50
46
37
55
44/17
Back layerort
40
28
23
26
50
46
The length of the ring
thread is L, mm
Front layer
4,7
5,0
5,0
5,8
6,6
6,5/5,3
Back layerort
6,25
7,2
7,1
6,8
6,8
6,3
Surface density of knitted fabric Ms,
g/m
2
367,2
309,7
308,4
240,3
373,1
447,5
The thickness T, mm
1,7
1,45
1,4
1,15
1,97
2,1
Volumetric density of knitted fabric d,
mg/cm
3
216
213,6
220,3
209
189,4
213,1
Absolute volumetric density
Δδ, mg/sm
3
-
2,4
-4,3
7
26,6
2,9
Relative lightness
θ, %
-
1,11
-1,9
3,2
12,3
1,3
The technological parameters of the two-layer knitted fabrics of the new structure
were compared. In this case, the first option of knitted fabric was taken as the base
fabric (Fig. 2). The front layer of the base fabric consists of a semi-ring (nabroska)
of glad and press fabric, and the back layer is made of a simple ring of press and is
connected to each other..
Proceedings of International Educators Conference
Hosted online from Rome, Italy.
Date: 25
th
Nov., 2023
ISSN: 2835-396X Website: econferenceseries.com
17
Figure 2. Histogram of the influence of the change of the ring pitch and the
height of the ring row on the length of the knitting of the two-layer knitted
fabric of the new structure
Therefore, the ring pitch for the front layer of the knitted fabric varied from 1.47 mm
to 2.2 mm, and for the back layer from 1.43 mm to 3.8 mm. Among them, the largest
ring pitch in both layers was observed in variant IV, and the smallest ring pitch was
observed in variant VI. When comparing the loop row height index of the knitted
fabric, the index of the front layer varied from 0.9 mm to 2.9 mm, and for the back
layer from 1.0 mm to 2.2 mm. Among them, the smallest ring pitch in both layers
was observed in variant V, the largest ring pitch was observed in variant VI in the
front layer, and variant III in the back layer. Also, the length of the ring thread, which
directly affects the raw material consumption, has changed from 4.7 mm to 6.6 mm
in the front layer, and from 6.25 mm to 7.2 mm in the back layer. Therefore, due to
the change of the fabric structure and the use of glad, press and derivative knitting
loops, the loop pitch, loop row height and loop yarn length also changed (Fig. 2).
After researching the technological parameters of the two-layer knitted fabric
samples produced in the new structure, it is possible to come to the conclusion that
the change in the ratio and structure of the fabric due to the interlocking arrangement
of the needles of the flat-needle knitting machine during the production of the knitted
fabric has been found to affect its technological parameters. As a result, it was found
that the parameters of raw material consumption of two-layer knitted fabrics of the
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