Sewing Thread Production
topic
Sewing thread is produced by ring spinning singles (Ne 60–120, high twist multiplier 5.0–6.5), folding 2–3 strands in the opposite direction (fold TM 3.0–4.5), and finishing with lubricant and glazing. Thread strength requirement: >25 cN/tex (2-ply Ne 80 cotton). CVT% <6% to prevent seam strength variation. Thread elongation 12–20% for sewability at 5,000–10,000 stitches/min. Sewing thread is the highest-value ring-spun product at $3–10/kg vs $1.50–4/kg for apparel yarns.
Role
Sewing thread production knowledge is relevant because it occupies the highest-value position in the ring spinning product hierarchy. Understanding the specific spinning parameters — high twist, fine count, low defect requirements — that distinguish thread production from apparel yarn production enables mills to evaluate their capability to serve this premium market segment and to justify the quality investments required.