Raw matarial

RAW COTTON QULITY FOR SPINNING MILLS

Prepared By : Mazadul Hasan sheshirID: 201000040000813th Batch (session 2009-2013)Department : Wet Processing Technology Email: [email protected] : 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


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


Southern Africa:

Advantages:

Low Neps Content

Low trash 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


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


Australia:

Advantages:

Less Trash Content

Less Contamination

High Short Fibre Content

Problems:

High Immature Fibre Content

Low Maturity



( 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.



Middle East :

Advantages:

Higher Strength

Higher Length & Length Uniformity Index

Low Neps Content

High Maturity

Low Trash Content

Problems:

Comparatively High Mic.

Color Contamination



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



Northern Africa:

Advantages:

Low Neps Content


Low Immature Fibre Content

High Maturity

Very High Fibre Strength

Problems:

Comparatively High Micronaire

High Dust Content

Color Contamination



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