Core Spinning on Ring Frame
topic
Core spinning produces composite yarns by feeding a continuous filament (elastane, polyester, nylon) through a guide into the spinning triangle, where it becomes the core wrapped by staple fibres. Elastane core spinning uses Lycra/Spandex at 3–5% yarn weight, pre-stretched 3–4×, feeding at 50–80% of yarn delivery speed. Polyester core (50–70% of yarn) is used for strength in sewing thread. The core-wrapper interaction in the spinning triangle determines core coverage and yarn uniformity.
Role
Core spinning capability transforms a commodity ring frame into a product development platform for stretch and performance yarns — the fastest-growing segment in apparel textiles. Understanding core spinning mechanics and the ability to specify elastane overfeed, draft, and TM for target stretch recovery is the technical foundation for accessing premium stretch denim, activewear, and medical textile markets.