Spin Finish Composition and Application
topic
Spin finish is applied at 0.3–0.8% owf via metered kiss-roll or oiling jet. Composition: 60–80% lubricant (mineral oil or ester-based, reduces fibre–metal friction coefficient to 0.1–0.2), 15–25% emulsifier (POE-based, maintains aqueous emulsion), antistatic agent (reduces surface resistivity to <10⁸ Ω/sq), cohesion agent (controls filament bundle integrity). Coning oil differs from staple finish.
Role
Spin finish is essential for processing continuity — preventing static, reducing friction damage, and providing cohesion. Its chemistry affects downstream processability, dye uptake uniformity, and fabric handle in finished goods.
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