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RAW COTTON QULITY FOR SPINNING MILLS
Prepared By : Mazadul Hasan sheshirID: 201000040000813th Batch (session 2009-2013)Department : Wet Processing Technology Email: mazadulhasan@yahoo.comBlog : www. Textilelab.blogspot.com (visit)
Southeast University Department Of Textile Engineering
I/A 251,252 Tejgaon Dhaka Bangladesh
Prepared By :
©right
In SIM Group, they use only cotton fiber. They produce low count yarns about 7-20 Ne. So they used different types of wastage. Mostly used raw cotton brand are Indian Cotton, Tanzanian Cotton, Brazilian Cotton etc. Different types of raw cotton and wastage are:-
Raw Materials Used:
1. Indian Cotton
2. Tanzanian Cotton
3. Australian Cotton
4. American Cotton
5. Pakistani Cotton
6. Nigerian Cotton
7. Brazilian Cotton
Raw Cotton:
1. Doffing-1
2. Doffing-2
3. Roving Crash
4. Pneumafil
5. Flat Strip
Wastage:
Fig: Pneumafil
Fig: Doffing-1
Fig: Doffing-2
Fig: Flat Strip
Fig: Roving Crash
Country of origin Weight(in KG/Bale) Cost per Kg(TK)Indian Cotton 160 Kg 160 TKTanzanian Cotton - -Australian Cotton 230 Kg-250 Kg 200 TKAmerican Cotton 230 Kg-250 Kg 200 TKPakistani Cotton 160 Kg 150 TKNigerian Cotton 190 Kg 160 TKBrazilian Cotton 250 Kg 170-180 TK
Fiber bale:
Fiber bale:
Season Temperature(0C)
Relative Humidity(RH %)
Summer 38 60-62Winter 20-25 58
Atmospheric condition of blowroom line:
PROBLEMS ASSOCIATED WITH PROCESSING OF RAW COTTON FROM DIFFERENT ORIGIN
Bangladesh is almost entirely dependent on imported raw cotton as the basic raw material for its spinning mills .
Cottons of following growth are used in Bangladeshi Spinning mills:
Central Asia ( Uzbekistan , Turkmenistan , Tajikistan , Kazakhstan )
South Asia ( India , Pakistan )
China
Middle East ( Syria , Turkey , Yemen )
West Africa ( Ivory Coast , Cameroon , Chad , Senegal )
Southern Africa ( Malawi , Zambia , Zimbabwe )
Northern Africa ( Sudan , Egypt )
An average quality results of cotton from different origin are shown in table 1 & 2 .
Processing Advantages & Problems of cotton of different origin:
CIS:
Advantages:
Consistent in quality
Good Micronaire Value
Low Short Fibre Content
Low Trash Content
Good Maturity Ratio
High Length Uniformity & Very High Spinning Consistency Index
Good fibre strength
Better Processing Performance
Problems:
Recently facing problem with White Specks in Knit Fabric
Color Contaminants
USA:
Advantages:
Very low contamination
Low trash content
Less Blow Room & Carding Waste
Problems:
High Mic
High Neps
Comparatively low strength
Lower spoiining speed & higher twist level
High short fibre content & more noil extraction
Low maturity in some growth
Processing Advantages & Problems of cotton of different origin:
West Africa:
Advantages:
• Good fibre strength , Length & Uniformity
• Low trash content
Problems:
• Comparatively High Short Fibre Content & Immature fibre Content
• Low Maturity Ratio
• High Contamination Problem
Processing Advantages & Problems of cotton of different origin:
Southern Africa:
Advantages:
Low Neps Content
Low trash content
Low Short Fibre Content
Low Immature Fibre Content
High Maturity
Very High Spinning Consistency Index in Zimbabwe Cotton
Problems:
Mic. Range sometimes found very wide
Some variety , specially in Malawi is not suitable to spin at higher
Carding & Spinning speed
Processing Advantages & Problems of cotton of different origin:
Middle East:
Advantages:
Good Length & Length Uniformity Index
Low Nep content
Problems:
Higher Trash Content
Low Maturity
High Nep generation at higher carding speed
Very High Contamination
Processing Advantages & Problems of cotton of different origin:
Australia:
Advantages:
Less Trash Content
Less Contamination
High Short Fibre Content
Problems:
High Immature Fibre Content
Low Maturity
Processing Advantages & Problems of cotton of different origin:
Processing Advantages & Problems of cotton of different origin:
( For Long Staple Cotton )
USA:
Advantages:
High fibre & yarn strength
High Maturity & Uniformity
Low Trash Content
Very Low Contamination
Problems:
Average Mic. Is observed to be increasing
Stickiness in some growth when used 100% Pima
Comparatively higher Neps content
Central Asia:
Advantages:
Good Uniformity
Low Trash Content
Problems:
Low Maturity
Higher Neps Content
Lower Fibre & Yarn Strength
Higher Mic.
Processing Advantages & Problems of cotton of different origin:
( For Long Staple Cotton )
Middle East :
Advantages:
Higher Strength
Higher Length & Length Uniformity Index
Low Neps Content
High Maturity
Low Trash Content
Problems:
Comparatively High Mic.
Color Contamination
Processing Advantages & Problems of cotton of different origin:
( For Long Staple Cotton )
China :
Advantages:
Very High Length & Length Uniformity
High Fibre Strength
High Fibre Elongation
Low Trash Content
Problems:
Comparatively Low Maturity , High IFC & Higher Neps Content
Stickiness problem when processing 100% Chinese Cotton
High Contamination
Processing Advantages & Problems of cotton of different origin:
( For Long Staple Cotton )
Northern Africa:
Advantages:
Low Neps Content
Low Short Fibre Content
Low Immature Fibre Content
High Maturity
Very High Fibre Strength
Problems:
Comparatively High Micronaire
High Dust Content
Color Contamination
Processing Advantages & Problems of cotton of different origin:
( For Long Staple Cotton )
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