Fibre Requirements for Air-Jet Spinning
topic
Air-jet spinning requires fibres with adequate length above 28 millimetres for cotton and 38 millimetres for synthetic staple to generate sufficient wrapping fibre tail length for stable vortex wrapping, with fibre surface friction coefficient governing wrapping tightness and yarn cohesion; short fibres below 20 millimetres reduce wrapping effectiveness and increase ends down rate in the vortex zone.
Role
Constrains the raw material selection for air-jet spinning to longer staple fibres that can generate adequate wrapping fibre length for stable yarn formation, limiting application to combed cotton, polyester-cotton blends, and modal fibre yarns while excluding short staple cotton and high-noil recycled fibre streams that would generate inadequate vortex wrapping and unacceptably high ends down rates.
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