Loop, Boucle, and Curl Yarns

Loop/boucle yarns: three-component structure with (1) core yarn (base, usually strong, 20-40 Ne), (2) effect yarn (softer, overfed 20-50% creating loops, 15-30 Ne), (3) binder yarn (securing loops to core, 40-80 Ne, tightly wrapped). Production: hollow-spindle or two-for-one twisters with overfeed mechanism, loop size controlled by overfeed ratio, twist level, and yarn tensions. Loop characteristics: loop height (2-10 mm), loop density (loops per cm 2-10), loop randomness (irregular spacing preferred for natural look), and loop retention (binder twist preventing loop slippage). Variations: regular boucle (uniform loops), irregular boucle (varied loop sizes), curl yarn (effect yarn wraps spirally around core), and gimp yarn (core zig-zags, effect yarn follows). Applications: fashion knitwear (texture, warmth, visual interest), upholstery (luxury, durability via loop structure protecting core), and decorative trim.