Analysis of the stress relaxation behaviour of sewing threads in the straight and loop form

Abstract

Sewing threads as the main part of a seam, are exposed to various levels of tensile loading during sewing and garment use. Therefore, their tensile performance and time-dependent mechanical property such as stress relaxation may influence seam performance and appearance. The current study aims to evaluate and compare the stress relaxation of six common sewing threads in both straight and loop forms. Moreover, the influence of strain level and extension rate on stress relaxation were investigated. The obtained outcomes revealed that increase of extension rate would lead to the stress relaxation enhancement; however, strain level rise resulted in stress relaxation diminish. When sewing threads deform to the loop, higher values of stress relaxation were recorded. The obtained experimental outcomes were consistent with the two-component Maxwell’s model.

Keywords:

• Sewing thread
• stress relaxation
• strain level
• extension rate

Disclosure statement

No potential conflict of interest was reported by the authors.