Bursting Strength Frequently Asked Questions
Short answers to the questions buyers ask most often about Bursting Strength.
What does it mean?
resistance to a perpendicular load. Working figures for Bursting Strength normally sit around above 300 kPa for stretch knits in mainstream production. Note ISO 13938-1 hydraulic method on the tech pack so nobody tests against an older revision.
What value should be specified?
Start from above 300 kPa for stretch knits and adjust for the end use of the garment. Record elastane content alongside Bursting Strength, because blends shift the measured value. A result outside above 300 kPa for stretch knits usually points to process drift rather than to the fibre itself.
How is it tested?
ISO 13938-1 hydraulic method. Keeping reference values for Bursting Strength lets suppliers quote without extra sampling rounds. Ask for conditioning details together with ISO 13938-1 hydraulic method, 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 Bursting Strength normally sit around above 300 kPa for stretch knits in mainstream production. Note ISO 13938-1 hydraulic method 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 Bursting Strength, because blends shift the measured value. A result outside above 300 kPa for stretch knits usually points to process drift rather than to the fibre itself.
