THEORETICAL ASPECTS IN THE FORMATION OF
PEDAGOGICAL SCIENCES
International scientific-online conference
191
COMPREHENSIVE EVALUATION OF QUALITY INDICATORS OF
TWO-LAYER KNITTED FABRICS.
S.Saparova
Assoc
Mirsadikov M.
Assoc
M.Musayeva
prof.
M.Mukimov
https://doi.org/10.5281/zenodo.16435955
Abstract:
In the scientific work, research was conducted on a
comprehensive evaluation of double-layer knitted fabrics made of pan yarn,
with the aim of effectively using local raw materials.
Keywords :
raw material, pan, knit, flat needle, double-ply, quality,
diagram, histogram..
In the textile industry, issues such as increasing and improving the quality
indicators of knitted products, expanding the assortment are of urgent
importance. In this regard, in our country, the development of the theory of
knitted fabrics, the creation of knitted fabrics with a new structure, and the
achievement of properties with acceptable indicators are solved through high-
quality production methods.
A comprehensive assessment of the quality indicators of fabrics
determines whether the knitwear is suitable for further processing or in which
direction it is recommended for use. The characteristics that determine quality
are set in standards, based on consumer requirements.
To determine the best variant of knitted fabrics, it is recommended to take
into account a number of factors that shape the structure and properties of the
fabric and use evaluation methods. According to the analysis results, the quality
indicators of the produced samples have priority in different variants. As a
result, there was a need to determine the optimal variant with the lowest raw
material consumption and the best quality indicators among the samples.
Therefore, in order to compare statistical data and the obtained experimental
results, a comprehensive evaluation method of the quality indicators of double-
layer knitted fabrics from pan yarn was used. The obtained samples are
compared in terms of quality indicators such as bulk density, air permeability,
breaking strength, elongation at break, percentage of reversible deformation
and penetration. Pan yarn with a linear density of 31 tex x 2 was used as the raw
material. Variant I was produced as the base fabric.
Based on the analysis of technological indicators and physical and
mechanical properties of glad fabric woven from pan yarn, research was
conducted to identify high-quality options. The method of constructing a
complex evaluation diagram of quality indicators was used to process statistical
data.
THEORETICAL ASPECTS IN THE FORMATION OF
PEDAGOGICAL SCIENCES
International scientific-online conference
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To compare the experimental results obtained, a method of constructing a
comprehensive evaluation diagram of the indicators of double-layer knitted
fabrics woven from pan yarn and a histogram of comparative comparison of
quality indicators was chosen.
The results obtained from the technological indicators and physical and
mechanical properties of two-layer knitted fabrics woven from pan yarn,
presented in Table 1, were used to construct diagrams and calculate the area of
polygons
Table 1
Physical and mechanical properties of double -layer knitted fabrics
where: Ms - surface density of knitted fabric, gr/m
2
; δ - bulk density, mg/cm
3
;
V-air permeability, cm
3
/cm
2
∙sec; I-friction resistance, thousand.rpm; R-
breaking strength (along length and width), N; L-elongation to break (along
length and width),%; ε
qs
- irreversible deformation (along length and width), %;
ε
qt
- reversible deformation (along length and width), %; K-fabric shrinkage
(along length and width), %. A comprehensive assessment of the quality
Options
Indicators
1
2
3
4
5
6
7
8
9
1 0
Surface density of knitted fabric , M
s
, g
/m
2
484.4
450
565.6
541.6
551.0
541.8
444.5
418.2
380.2 553.6
GOST 28554-9028554-
90
Thickness of the knitwear , T mm
1.9
2
2.31
2.2
2.18
2.84
2.2
1.88
1.9
2.48
Bulk density of knitted fabric gi δ ,
mg/cm
3
255
2 50
245
246
253
190.8
202
222.4
200.1 223.2
Air permeability , Vr cm
3
/cm
2
sec
44.46
29.52
51.83
37.35
49.90
52.8
93.1
100.8
89.9
48.3
GOST 1228-2014 100
(dm
3
/m
2
sek) as emas
Translate kuchi , Rr , N
My brother my
brother
417
572
378
443
601
366
599
449
460
374
GOST 28554-90
80 N and how are they?
This is how it is
330
466
657
721
818
359.5
548.5
439.5
419.5
968
Elongation at break , L ,
%
Along the way
126
145
117
119
116
132.5
117.5
110
116
122
GOST 28554-90 I-0-40
% . II-41-100% III-
100% from no
By width
127
70
111
131
120
137.5
111.5
138
131.5
94
GOST 28554-90 I-0-
40%.II-41-100% III- less
than 100%.
Irreversible
deformation , ε
n
,%
Along the way
18
20
14
20
20
20
19
16
16
17
GOST 28882-90 5-20%
more it's not
By width
17
18
15
19
18
19
22
29
25
14
Return strain , ε
o
, %
Along the way
8 2
80
86
8 0
80
80
81
84
84
83
By width
83
8 2
85
81
82
81
78
71
75
86
Elongation , %
By width
5
4
6
5
10
18
12
24
21
19
Abrasion resistance, thousand rpm .
25
25
25
25
25
26.5
25
23.8
28.5
29.5
Thermal conductivity %
4.6
10.8
11
9.6
6
45.9
45.9
45
47.2
38.6
Input U, %
Along the way
+1.2
+3.1
+1.8
+1.2
+1.2
0
0
+4.3
+2.5
+1.7
By width
+1.2
-1.25
+2.5
+1.2
+1.2
+2.5
+1.9
0
0
0
THEORETICAL ASPECTS IN THE FORMATION OF
PEDAGOGICAL SCIENCES
International scientific-online conference
193
indicators of fabrics determines the suitability of knitted fabric for further
processing or in which direction it is recommended to use it. The characteristics
that determine quality are defined in standards based on consumer
requirements [2-10] .
Based on the analysis of technological parameters and physical and
mechanical properties of double-layer knitted fabrics woven from PAN yarn,
research was conducted to identify high-quality options. To identify high-quality
options, it is necessary to take into account many factors that shape the
structure and properties of double-layer knitted fabrics. The method of
constructing a complex evaluation diagram of quality parameters was used to
process statistical data. This method allows you to determine the highest quality
option from the total area of the constructed polygons.
Polygons that provide a comprehensive assessment of the quality parameters of
double-layer knitted fabrics are formed by sequentially connecting points
located on radius vectors.
To compare the experimental results obtained, a method for constructing
a comprehensive evaluation diagram of the indicators of double-layer knitted
fabrics woven from pan yarn and a histogram for comparative comparison of
quality indicators was chosen.
THEORETICAL ASPECTS IN THE FORMATION OF
PEDAGOGICAL SCIENCES
International scientific-online conference
194
Figure 1. Diagram of a comprehensive assessment of the quality indicators
of double-layer knitted fabrics woven from PAN yarn.
The value of the area surfaces obtained from the complex evaluation
diagram is expressed through a comparative histogram of the quality indicators
of knitted fabrics, and the optimal variants of knitted fabric samples are
determined using the best results obtained according to the histogram
indicators.
The value of the area surfaces obtained from the complex evaluation diagram is
expressed through a comparative histogram of the quality indicators of knitted
fabrics.
Figure 2 Comprehensive assessment of the quality indicators of double-
layer knitted fabrics histogram.
As can be seen from the results of the comprehensive evaluation diagram
and the comparative evaluation histogram of the quality indicators of the new
structured double-layer knitted fabrics, the 10th variant of the knitted fabric is
16101 in terms of the evaluation histogram. It was found that the best option
was
14254 mm 2
, option
9
14095 mm
2
, option 8 12219 mm 2
and
option 5 12155 mm
0
2000
4000
6000
8000
10000
12000
14000
16000
18000
V-1
V-2
V-3
V-4
V-5
V-6
V-7
V-8
V-9
V-10
10536
10163
14254
10122
12155
9181
13925
12219
14095
16101
Наз
ван
ие
оси
Options
THEORETICAL ASPECTS IN THE FORMATION OF
PEDAGOGICAL SCIENCES
International scientific-online conference
195
2 . The surface area of the samples
was higher than the area of option 1 10155
mm
2 .
Conclusion
1.Research into new structures of double-layer knitted fabrics made of
polyacrylonitrile yarn creates the opportunity to use local raw materials on a
wide scale.
2.The production of double-layer knitted fabrics on flat-needle machines
increases the technological capabilities of the machine and expands the range of
fabrics and products.
3.Based on the results of the comprehensive evaluation diagram and
comparative evaluation histogram of the quality indicators of the proposed new
structured double-layer knitted fabrics, the 10th variant of the knitted fabric
was evaluated according to the histogram indicators 16101 mm
2
was found to
be the best option. Also, the fact that the surface area of the samples of option 3
(14254 mm
2 )
, option 9 (14095 mm
2 )
, option 8 (12219 mm
2 )
and option 5
(12155 mm
2 ) is higher than the area
of the base option 1 (10155 mm
2 )
indicates that
the quality index of these options has achieved a good result.
4.Newly developed double-layer knitted fabrics are recommended for
upper knitted products.
List of used literature
1.Presidential Decree "On measures to bring the development of the textile and
garment and knitwear industry to a new level" (No. PF-71, 01.05.2024)
https://kknews.uz
2.Muqimov MM The role of innovative developments in the textile industry. //J.
Problems of Mechanics-2018.-№1. p. 42.
3.Sevostyanov A.G. Methods and means of investigation of mechanical and
technological processes of textile industry. M., 2007.
4.Shalov II, Dalidovich AS, Kudryavin LA, Technology of tricot production. M.,
Easy and food productivity, 1984. – p. 89-98
5.Guseva A. A. Technology and equipment for flat and round production.
Moscow: Legkaya i pishevaya promishlennost', 1981. 42-43 p.
6.Patent No. 2302485 (Russia), MPK D 04 B 1/00. Two-layer tricot of combined
interweaving. V. A. Zinoveva, M. A. Popova.
7.Marisova OI Trikotajniye risunchatiye perepleteniY . M.: Legkaya i pishevaya
promishlennost , 1984g. -s. 141-142.
8.Torkunova ZA Ispitaniya trikotaja . M.: Legkaya industry , 1975. -s. 111-115.
THEORETICAL ASPECTS IN THE FORMATION OF
PEDAGOGICAL SCIENCES
International scientific-online conference
196
9.GOST 8845-87. Poltna i products tricot . Methods definitions moisture , mass i
superficial plotnosti , GOST 8847-85. Polotna tricot . Method definitions
razrivnix characteristics i rastyajimosti at loaded , men razrivnix , GOST 12739-
85. Polotna and products tricot . Method definitions resistance to wear and tear
