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Sewing thread passes rapidly through guides, tension components, a needle eye and fabric layers. Suitable lubrication reduces undesirable friction and supports consistent stitch formation. In polyester garment sewing, the balance matters because excessive drag can contribute

A polyester sportswear seam can pass initial strength testing and still fail after repeated movement. Learn how cyclic stretch, sewing thread, stitch type, tension and fabric recovery cause seam fatigue.

Why does polyester fabric develop melted holes, glazed fibres or weak seams during high-speed sewing? Learn how needle friction, sewing speed, needle size, thread tension and thermoplastic behaviour cause sewing damage—and how garment factories can prevent it.