Tensile properties of the thread play a major role in quality, appearance & aesthetics of the seam. However, those properties are reduced considerably after sewing in high speed machines due to repeated loads & deformations (stretch, bending, compression, shearing, friction, abrasion, high temperature…) and after industrial washing process (when emerging in hot, detergent water under torsion bending, compression, friction, abrasion during long period of time). This article studied the changes in tensile properties of 5 threads sewn in Denim fabrics used for export order of Duc Giang Garment Co. Ltd. Results show that low extension of threads after sewing & washing does not influence on the quality of the seam. However, the breaking elongation & tensile strength of sewing threads 3, 4 after sewing & industrial washing is reduced considerably by 14,56% & 64,5% due to Denim drying process at 105oC during 90 min and may reduce strength and quality of the seam.
Keyword
Tensile properties of thread, Strength reduction of thread, Elongation reduction in thread.
