List of defects in woven fabric

Post on 22-Jan-2017

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Transcript of List of defects in woven fabric

Yarn Related Defects

Mixed End/ Thick End:It can be identified as the warp end having larger diameter than the other warps

Slub Or Slug:

Abnormally thick place occurring in the yarn that affects the fabric’s appearance

Warp Direction Defects

Reedy Fabric Marks:

Appearance of fine cracks across the fabric between warp end groups which resemble denting pattern in the reed

Warp Streaks:

Warp streaks can be identified as the warp way stripes of shade variations occurring between groups of threads

Misdraws / Wrong Draw:Design or stripes in the final fabric being damaged due to drawing of incorrect ends

Broken / Missing End:It can be identified as the space created in the fabric when a yarn partially or completely is missing from the fabric

Weft Direction Defects

Starting Marks:Thick or thin places occurring in fabric due to pick density variation when starting the loom, causing starting marks

Filling/Weft Bars

Broken Pick:

Broken Pick defect can be identified as the weft inserted to only a partial portion of the pick

Broken Pattern:This defect occurs on drop box looms for fabrics that have patterns. If the sequence of weft yarn colour breaks or pattern width of particular colour is distorted, broken pattern defect appears

Double Pick:

This defect happens when more than one pick is inserted in the single shed

Gout:

Appearance of foreign matter or contamination like lint, waste, etc woven into the fabric

Sloughing off:

When a bunch of or coil of yarn slips from the pirn during weaving then thick yarn bunches or coils appear on the fabric

Snarl:

When yarn doubles back on itself especially of high twist yarn are used snarling appears. It can be found randomly spread across fabric width or only in a region nearbythe selvedge

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