Spiral and Corkscrew Yarns

Spiral/corkscrew yarns: two-component yarn with effect component wrapping spirally around core at visible helix angle (30-60°) creating colored or textural spiral. Production: two-fold twisting with differential feed (effect yarn overfed 10-30% while core yarn normal feed, twist locks spiral), or core-spun process. Parameters: spiral pitch (distance between successive wraps 5-30 mm), spiral angle (30-60° for visible effect), color contrast (different colors maximizing visual impact), and twist level (securing spiral, preventing slippage). Variations: simple spiral (single effect wraps single core), multi-spiral (multiple effects wrapping creating complex patterns), and corkscrew (high overfeed creating tight corkscrew configuration). Applications: decorative trim, fashion accessories (scarves, belts), upholstery accents, and craft/hand-knitting yarns where spiral creates self-striping patterns.