Seam Slippage Why Shipments Get Rejected Over This
Many disputes come down to Seam Slippage. Below is what inspectors check and why shipments fail.
The core definition
yarn movement away from the seam. Working figures for Seam Slippage normally sit around below 6 mm at 60 N in mainstream production. Note ISO 13936-2 fixed load on the tech pack so nobody tests against an older revision.
Most common cause of failure
Results usually fall outside below 6 mm at 60 N because the target was never written into the order. Record elastane content alongside Seam Slippage, because blends shift the measured value. A result outside below 6 mm at 60 N usually points to process drift rather than to the fibre itself.
How it is checked
Inspection and laboratory work both refer to ISO 13936-2 fixed load. Keeping reference values for Seam Slippage lets suppliers quote without extra sampling rounds. Ask for conditioning details together with ISO 13936-2 fixed load, since both affect the reading.
Related faults
it is the main seam failure mode in smooth filament fabric, so related complaints often point back to this single parameter. Working figures for Seam Slippage normally sit around below 6 mm at 60 N in mainstream production. Note ISO 13936-2 fixed load on the tech pack so nobody tests against an older revision.
Avoiding rejection
Agree targets, tolerances and the method before production, then test per lot rather than per shipment. Record elastane content alongside Seam Slippage, because blends shift the measured value. A result outside below 6 mm at 60 N usually points to process drift rather than to the fibre itself.
