SOUTHEAST 08/06/15 Analysis of fabric faults & its remedies 3 Introduction Objectives of the project: To know about knit fabric faults.. To learn the knitting process To know about how
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Trang 2Name : 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
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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.
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What is fabric defect?
What is fault free
fabric ?
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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
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Factors that lead to fabric
Excessive machine stops particularly during spinning
Excessive ends piecing during spinning preparation
Poor maintenance and housekeeping
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Drop stitches (holes) Barriness
Streakiness Imperfections Snarls
Contaminations Spirality
Fly Broken needles Sinker lines
Oil Lines Broken ends Fabric press of Needle lines Cloth fall- out Grease stain Pin hole
Rust stain Oil stain Star Mark
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Fabric press off
Fabric press of appear, as a big small hole in the fabric, caused due to the interruption of the loop forming process, as a result of the yarn breakage,
or closed needle hooks Press of takes place, when the yarn feeding to both the short butt & long butt needles, suddenly stops, due to the yarn breakage.
Causes:
End breakage on feeders, with all needles knitting.
Yarn feeder remaining in lifted up position, due to which the yarn doesn’t get fed in the hooks of the needles.
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GRADING0-19 points A- grade20-29 points B- grade
30 points & above C-grade
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