1. SOUTHEAST UNIVERSITY
Department of textile Engineering
05/22/14 Analysis of fabric faults & its remedies 1

2. Name : MAZADUL HASAN SHESHIR
ID: 2010000400008
Batch: 13th Batch (Session 2009-2013)
Department: Wet Processing Technology
Email: mazadulhasan@yahoo.com
Blog: www. Textilelab.blogspot.com
Southeast University
Department of Textile Engineering
PREPARED BY ©right

3. SOUTHEAST UNIVERSITY
Department of textile Engineering
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Introduction
Objectives of the project:
To know about knit fabric faults.
To learn the knitting process
To know about how to reduce knit fabric faults.
To know about how to improve the quality of knit fabric.

4. SOUTHEAST UNIVERSITY
Department of textile Engineering
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What isfabric defect?
What isfault freefabric ?

5. SOUTHEAST UNIVERSITY
Department of textile Engineering
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Factors that lead to fabric defects
A. Material-Related Factors
Fiber contaminants
Excessive neps and seedcoat fragments
Excessive short fiber content
Excessive trash content
High variability between and within-mix
Clusters of unfavourable fiber characteristics
Weight variation
Twist variation
Excessive Hairiness

6. SOUTHEAST UNIVERSITY
Department of textile Engineering
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Factors that lead to fabric defects (contd.)
B. Machine-Related Factors:
Failureof spinning preparation to eliminateor minimizeshort and long-term
variation
Failureof themixing machinery to provideahomogenousblend
Excessivemachinestopsparticularly during spinning
Excessiveendspiecing during spinning preparation
Poor maintenanceand housekeeping
Knitting-related defects
Dyeing and Finishing-related defects

7. SOUTHEAST UNIVERSITY
Department of textile Engineering
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8. SOUTHEAST UNIVERSITY
Department of textile Engineering
05/22/14 Analysis of fabric faults & its remedies 8
Drop stitches(holes)
Barriness
Streakiness
Imperfections
Snarls
Contaminations
Spirality
Fly
Broken needles
Sinker lines
Oil Lines
Broken ends
Fabric pressoff
Needlelines
Cloth fall- out
Greasestain
Pin hole
Rust stain
Oil stain
Star Mark

9. SOUTHEAST UNIVERSITY
Department of textile Engineering
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10. SOUTHEAST UNIVERSITY
Department of textile Engineering
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11. SOUTHEAST UNIVERSITY
Department of textile Engineering
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12. SOUTHEAST UNIVERSITY
Department of textile Engineering
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13. SOUTHEAST UNIVERSITY
Department of textile Engineering
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14. SOUTHEAST UNIVERSITY
Department of textile Engineering
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15. SOUTHEAST UNIVERSITY
Department of textile Engineering
05/22/14 Analysis of fabric faults & its remedies 15

16. SOUTHEAST UNIVERSITY
Department of textile Engineering
05/22/14 Analysis of fabric faults & its remedies 16

17. SOUTHEAST UNIVERSITY
Department of textile Engineering
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18. SOUTHEAST UNIVERSITY
Department of textile Engineering
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19. SOUTHEAST UNIVERSITY
Department of textile Engineering
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20. SOUTHEAST UNIVERSITY
Department of textile Engineering
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21. SOUTHEAST UNIVERSITY
Department of textile Engineering
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Fabric press off
Fabric pressoff appear, asabig small holein thefabric, caused dueto theinterruption of the
loop forming process, asaresult of theyarn breakage, or closed needlehooks. Pressoff takes
place, when theyarn feeding to both theshort butt & long butt needles, suddenly stops, due
to theyarn breakage.
Causes:
End breakageon feeders, with all needlesknitting.
Yarn feeder remaining in lifted up position, dueto which theyarn doesn’t get fed in the
hooksof theneedles.
Remedies:
Needledetectors, should beset precisely, to detect theclosed needles& prevent thefabric
tubeform completely pressing off.
Proper yarn tension should bemaintained, on all thefeeders.

22. SOUTHEAST UNIVERSITY
Department of textile Engineering
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23. SOUTHEAST UNIVERSITY
Department of textile Engineering
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24. SOUTHEAST UNIVERSITY
Department of textile Engineering
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25. SOUTHEAST UNIVERSITY
Department of textile Engineering
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26. SOUTHEAST UNIVERSITY
Department of textile Engineering
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27. SOUTHEAST UNIVERSITY
Department of textile Engineering
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28. SOUTHEAST UNIVERSITY
Department of textile Engineering
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Department of textile Engineering
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GRADING
0-19 points A- grade
20-29 points B- grade
30 points & above C-grade

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Department of textile Engineering
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Department of textile Engineering
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32. SOUTHEAST UNIVERSITY
Department of textile Engineering
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33. SOUTHEAST UNIVERSITY
Department of textile Engineering
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