Fabric BarréFiber 70% Yarn Count Variation 10% Twist Variation 10% Hairiness 10%... Fabric Barré due to1... Knitted Fabric Sample:3 Varieties, Same Mic, Same Growing Area Bale Number...
Trang 1Fabric Sample
Trang 2Fabric Barré
Fiber 70%
Yarn Count Variation 10%
Twist Variation 10%
Hairiness 10%
Trang 3Fabric Barré due to
1 Micronaire
2 Maturity/Fineness
3 Fluorescence
Trang 4Causes of Barré :
• > 0.2 Difference in micronaire
• > 0.1 Change in average micronaire mix to mix
• > 12% CV of Micronaire within mix
• Bales with same micronaire placed side by
side in mix
Trang 53.9
4.0
4.1
4.2
4.3
4.4
4.5
1 2 3 4 5 6 7 8 9 10 11 12 13 14
Mix Number
Micronaire
Acceptable Change in Micronaire
from Mix to Mix
Maximum ± 1
Trang 6High Micronaire CV% in Mix
3.6
3.7
3.8
3.9
4.0
4.2
4.3
4.4
4.5
4.6
4.7
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
Bale Number
Micronaire
* Maximum CV 12%
Aug 4.1 CV% 17.7*
Trang 7Maturity & Fineness
Causes of Barré
• Blending cottons from different growth areas
• Blending cottons from different seed varieties
• Seasonal changes in cotton growth cycle
– Weather
– Insects
• Immature Fiber Content% (IFC%)
– White Speck Neps
– Carding Speeds
Trang 8Knitted Fabric Sample:
3 Varieties, Same Mic, Same Growing Area
Bale Number
Trang 9HVI Bale Data:
Length & Micronaire Analysis
0
1
2
3
4
5
0 5 10 15 20 25 30 35
Bale 1 Bale 2 Bale 3
Micronaire Length Strength
Micronaire & Length (in) Strength (g/tex)
Trang 10Uster Yarn Data (Ne 26)
0
100
200
300
400
500
600
0 1 2 3 4 5 6 7
Trang 11AFIS Maturity Module: Maturity
Analysis
0
2
4
6
8
10
12
14
0 20 40 60 80 100 120 140 160 180 200
Bale 1 Bale 2 Bale 3
Immature Fiber Content Fineness
Immature Fiber Content (%) FIneness (mtex)
Trang 12White Speck Neps
Fabric A Fabric B Fabric C
Trang 14Fabric White Speck Defects:
AFIS Maturity Module
0
2
4
6
8
10
12
14
16
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1
Fabric A Fabric B Fabric C
Immature Fiber Content Maturity Ratio
Trang 15Card Mat & Sliver Variation:
AFIS Maturity Analysis
0
2
4
6
8
10
12
14
16
18
Card 7 Card 8 Card 9 Card 11 Card 12 Card 13
Immature Fiber Content (%)
Trang 16Variation in Card Sliver:
AFIS Maturity Module
0
5
10
15
Card 1 Card 19 Card 25 Card 35 Card 49 Card 51
Immature FIber Content (%)
Trang 17Causes of Barré
• Variation in average UV readings between bale mixes
• CV% in UV readings within a mix
• End-of-season cotton crop changes
• Outside storage of cotton bales
• Mixing high and low UV bales
• UV readings increase over time in warehouse
Trang 18Solutions
• UV test every bale before making mix
• Maximum 10 points difference of UV
readings within mix
• Maximum change in UV average 1 point between mixes
• Set up category groups for UV
Trang 19Variation of Bale UV Within Mix
65
70
75
80
85
90
95
100
Bale Number
UV
Average 80 Max ±5
Trang 20Variations in Average UV
from Mix to Mix
75
76
77
78
79
80
81
82
83
84
85
Mix Number
UV
Maximum Change ±1 in Average