Slub and Thick-Thin Yarns

Slub yarns: deliberately irregular yarns with periodic thick sections (slubs) alternating with normal sections, created by varying draft during ring spinning via electronically-controlled drafting system (draft changes 20-200% at programmed intervals 5-50 cm). Slub parameters: slub length (10-100 mm), slub thickness (150-500% of base yarn), slub spacing (regular/random patterns), and base yarn count (10-60 Ne typical). Production: specialized ring spinning frames with servo-motor driven drafting rollers enabling precise draft variation patterns programmed via computer. Applications: fashion denim (slub creating vintage, handcrafted aesthetic commanding 20-40% premium $4-7/m fabric), t-shirts and casual wear (textured appearance), upholstery (visual interest), and hand-knitting yarns. Market: particularly strong in premium denim where slub pattern differentiates brands.