Tensile Strength Test Methods and Acceptable Limits
Tensile Strength is verified through ISO 13934-1 strip test. Knowing how the method works avoids rejecting fabric that actually meets the requirement.
Method overview
ISO 13934-1 strip test defines sample size, conditioning and calculation, so values are comparable only within the same revision. Working figures for Tensile Strength normally sit around above 150 N for most knits in mainstream production. Note ISO 13934-1 strip test on the tech pack so nobody tests against an older revision.
Result interpretation
Read the value together with construction notes; above 150 N for most knits is only meaningful for similar fabrics. Record elastane content alongside Tensile Strength, because blends shift the measured value. A result outside above 150 N for most knits usually points to process drift rather than to the fibre itself.
Typical limits
Buyers commonly write above 150 N for most knits with a stated tolerance, then verify against ISO 13934-1 strip test. Keeping reference values for Tensile Strength lets suppliers quote without extra sampling rounds. Ask for conditioning details together with ISO 13934-1 strip test, since both affect the reading.
Sources of variation
Conditioning time, operator technique and shade all influence the result. Working figures for Tensile Strength normally sit around above 150 N for most knits in mainstream production. Note ISO 13934-1 strip test on the tech pack so nobody tests against an older revision.
Documentation
Record the standard revision on every report, because older versions can differ from current practice. Record elastane content alongside Tensile Strength, because blends shift the measured value. A result outside above 150 N for most knits usually points to process drift rather than to the fibre itself.
