Tear Strength Setting It Correctly on a Tech Pack
Tear Strength should be written into the tech pack with a value, a tolerance and a method. This removes ambiguity from quotations.
Definition to agree
force needed to continue a tear. Working figures for Tear Strength normally sit around above 10 N typical in mainstream production. Note ISO 13937-2 trouser tear on the tech pack so nobody tests against an older revision.
Target value
Open the specification at above 10 N typical, adjusted to the end use. Record elastane content alongside Tear Strength, because blends shift the measured value. A result outside above 10 N typical usually points to process drift rather than to the fibre itself.
Method line
Always pair the target with ISO 13937-2 trouser tear so the mill and the laboratory test the same way. Keeping reference values for Tear Strength lets suppliers quote without extra sampling rounds. Ask for conditioning details together with ISO 13937-2 trouser tear, since both affect the reading.
Tolerance line
State plus or minus limits to keep production realistic while protecting the requirement. Working figures for Tear Strength normally sit around above 10 N typical in mainstream production. Note ISO 13937-2 trouser tear on the tech pack so nobody tests against an older revision.
Approval step
Approve the result on pre-production bulk rather than on development fabric only. Record elastane content alongside Tear Strength, because blends shift the measured value. A result outside above 10 N typical usually points to process drift rather than to the fibre itself.
