What Is Open-End Yarn? Rotor Spinning Technology
Open-end (OE) yarn is produced by spinning cotton fiber bundles inside a rotating rotor. Unlike ring spinning, in OE technology the fiber bundle is fed to the rotor via an "open end" — hence the name "open-end." The centrifugal force inside the rotor twists and wraps the fibers, forming a continuous yarn. Modern OE machines can operate at 120,000 rpm and offer 6-8 times higher production speed than ring spinning.
OE Yarn Production Process: Step by Step
OE yarn production involves: (1) Opening and Cleaning — raw cotton bales are opened and foreign matter is removed. (2) Carding — fibers are cleaned and parallelized. (3) Sliver Preparation — unlike ring spinning, OE skips the roving stage; slivers go directly to rotor feeding. (4) Rotor Spinning — the sliver enters the rotating rotor, is twisted by centrifugal force and forms yarn. (5) Winding — yarn is wound onto cones or bobbins. Fewer machine stages than ring spinning result in lower costs.
OE Yarn vs Ring Yarn: Technical Comparison
Key differences between ring and OE yarn: Ring yarn has a brighter, more uniform and stronger structure, preferred for premium products; OE yarn has a hairier, bulkier and matte appearance, making it unrivalled for denim, home textiles and industrial fabrics. In terms of tenacity, ring yarn is 15-25% stronger than OE. However, OE yarn is produced at 20-30% lower cost. Considering also the speed advantage, OE yarn is the cost leader in high-volume production.
Count Range: Choosing the Right OE Yarn Quality
Open-end yarn is typically produced in the Ne 6/1 to Ne 40/1 range. At Sangzor Textile we cover this full range. Most popular counts: Ne 6-10 (carpets, home textiles, heavy weaving); Ne 10-20 (denim, jeans, canvas); Ne 20-30 (medium-weight denim, workwear); Ne 30-40 (light denim, poplin blends). Carded cotton is most common in OE yarn, though combed options are available.
Application Areas for OE Yarn
Open-end yarn is widely used in: (1) Denim and Jeans — approximately 70% of global denim is made with OE yarn; its irregular surface creates the characteristic denim texture. (2) Home Textiles — towels, bathrobes, bed linen and curtains; bulky structure delivers softness and absorbency. (3) Workwear — durable, easy-care work clothing with excellent cost-performance balance. (4) Hosiery — large share of industrial sock production. (5) Technical Textiles — industrial fabrics for construction, agriculture and filtration applications.
Uster Quality Parameters: What to Look for in OE Yarn
Key Uster quality parameters when purchasing OE yarn: CVm% (yarn irregularity) — OE yarn CVm% is typically 1-2 points higher than ring yarn; target CVm < 14% for Ne 20 OE. IPI (thin places, thick places, neps) — total IPI < 200 for Ne 20 OE yarn. Breaks — fewer than 2 breaks per 100 machine hours is ideal. Hairiness (H) — higher in OE than ring; H 5-8 is normal. Always request these values as a written Uster test report.
Sangzor Textile OE Yarn Capacity and MOQ
Sangzor Textile has a daily open-end yarn production capacity of 45 tons. All OE lines are equipped with the latest Rieter and Schlafhorst Autocoro rotor machines. MOQ: 5 ton/color (greige), 3 ton/color (dyed). Lead time: 2-3 weeks for standard counts, 4-6 weeks for custom Ne. ISO 9001:2015 and OEKO-TEX Standard 100 certified facility shipping to 90+ countries worldwide. Contact our team to request a free sample.
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