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Relative Performance of Lockstitch and Chainstitch at the Seat Seam of Military Trouser

An experimental investigation of the effect of two different type of stitches viz., lockstitch and chainstitch at the seat seam of trouser for military armed forces has been reported. Performance of chainstitched seam is found to be much better as regards lower value of force at low level of strain, higher value of force at break, strain at break and work of rapture. In general with the change in thread linear density, greater improvement in seam strength, seam strain at break and work up to fracture are obtained in case of chainstitched seam. On laundering, in general force at small strain and force at break increases, the change being more in case of lockstitched fabric. However, strain at break decrease marginally on laundering in case of both the stitches.