CORE YARN SEWING THREAD

摘要

A core yarn sewing thread produced by twisting together multiple substantially zero-twist core yarns, these substantially zero-twist core yarns each obtained by effecting swivel winding of staple fiber yarn (2) as a sheath yarn around the entire circumferential surface of fiber yarn (1) as a core yarn along its longitudinal direction at a winding rate of 20 to 60% in terms of whole yarn weight ratio. Thus, there can be provided a core yarn sewing thread that in sewing with the use of an industrial lock stitch sewing machine, attains improvement in the dyeing difference between core yarn and sheath yarn, exposure of core yarn portion, stitch puckering, stitch appearance, etc. having been regarded as drawbacks and excels in high-speed sewability, automatic sewability according to computer control and high sewability of buttonhole, etc.