Tribology of Needle-Yarn Interaction
topic
Needle-yarn tribology investigates the friction and wear mechanisms at the contact interface between needle surfaces and yarn during loop formation, with yarn tension during needle rising and drawing determined by the coefficient of friction between yarn and needle surface, and needle surface wear from abrasive fibre contact being the primary needle failure mechanism that reduces hook geometry accuracy and increases yarn tension variation causing quality deterioration.
Role
Provides the scientific basis for needle surface treatment and lubrication optimisation that reduces friction-induced yarn tension and needle wear rate, enabling development of needle surface coatings and lubricant formulations that simultaneously minimise yarn tension during loop formation to reduce yarn breakage and maximise needle service life by reducing the surface wear rate from continuous abrasive yarn contact.
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