Tensile Strength Frequently Asked Questions
Short answers to the questions buyers ask most often about Tensile Strength.
What does it mean?
maximum force before breaking. 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.
What value should be specified?
Start from above 150 N for most knits and adjust for the end use of the garment. 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.
How is it tested?
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.
Why does it change between lots?
Process variables such as finishing temperature and elastane batch cause the normal spread of results. 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.
Can results be compared across suppliers?
Only when the same standard revision and conditioning are used; otherwise measurements are not equivalent. 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.
