Oil pick‑up is a critical parameter for polypropylene yarn spinning oil. Stable oil pick‑up guarantees lubrication, cohesion and anti‑static property of yarn bundles. Even without changing spin‑finish stock solution, many spinning plants encounter unstable oil‑absorption of finished fibers, which triggers defects in downstream drawing and winding procedures.

Abnormal condition of oil‑application equipment is a frequent cause of oil‑pick‑up fluctuation. For kiss‑roll system, scaling or partial abrasion on oil roller brings uneven oil‑wetting status. Oil amount transferred onto yarn varies accordingly. For spray‑type oil supply, blocked nozzles and poor atomization distort droplet‑size distribution and lead to uneven oil coating across filament bundles. Regular inspection and cleaning for oil rollers and nozzles shall be implemented to avoid deviation caused by worn components.

Concentration drift of circulating working emulsion also disturbs oil‑application result. Long‑time circulation in oil bath causes water evaporation and raises emulsion concentration. Insufficient stirring during liquid replenishment brings concentration stratification inside tank and inconsistent oil‑coating effect. Operators shall sample and test circulating‑bath concentration regularly instead of only relying on initial preparation parameters.

Yarn bundle status shall not be neglected. Output fluctuation and yarn‑tension shift change contact wrap angle between filament and oil‑application roller, alter contact duration and finally affect oil amount per unit fiber weight. Oil pick‑up shall be closely monitored during line speed rising or falling instead of simply adopting steady‑state parameters.

Polypropylene yarn spinning oil supplied by TAO NANO CHEMICALS(DONGGUAN) CO.,LTD. features excellent emulsion stability. Practical suggestions for oil‑system maintenance and concentration inspection are provided for spinning mills to keep oil pick‑up within proper scope.

Regular sampling inspection and scheduled maintenance for oil‑application devices effectively restrain oil‑pick‑up fluctuation of Polypropylene yarn spinning oil, stabilize fiber surface condition, reduce fuzz in drawing and poor winding defects and ensure batch consistency across the whole spinning line.