▎ 摘　　要

NOVELTY - Performing melt direct spinning hollow curling HOY (nylon high-orientation yarn) production process involves mixing the polycaprolactam slice, functional filler, hyperbranched polyamide to obtain the mixed material, then heating, melting, and extruding in the screw extruder and adding into the reactor, vacuumizing, stirring to obtain spinning melt. The spinning melt is pressurized and conveyed by a gear booster pump, and cooled by a cooler to obtain the pre-treated spinning melt. The pre-processed spinning melt is conveyed into the spinning box, distributed to each spinning position, and is sent to each spinning component, uniformly pressurized, sprayed out by fine flow, orderly passed through the fiber cooling area for ring blowing cooling, to form monofilament with hollow structure. USE - Method for performing melt direct spinning hollow curling HOY production process. ADVANTAGE - The method is simple and easy, has low device dependency, short processing, high efficiency, stable product, provides guidance for industrial production of hollow curling HOY, effectively solves the bad hollow curling HOY cooling effect, low hollow degree, bad product quality. The investment is low, has a fast effect, greatly reduces the textile cost. The prepared hollow curling HOY has excellent comprehensive performance, multiple functions, good hand feeling, good performance stability, and high wearing comfort. DETAILED DESCRIPTION - Performing melt direct spinning hollow curling HOY (nylon high-orientation yarn) production process involves mixing the polycaprolactam slice, functional filler, hyperbranched polyamide to obtain the mixed material, then heating, melting, and extruding in the screw extruder and adding into the reactor, vacuumizing, stirring to obtain spinning melt. The spinning melt is pressurized and conveyed by a gear booster pump, and cooled by a cooler to obtain the pre-treated spinning melt. The pre-processed spinning melt is conveyed into the spinning box, distributed to each spinning position, and is sent to each spinning component, uniformly pressurized, sprayed out by fine flow, orderly passed through the fiber cooling area for ring blowing cooling, to form monofilament with hollow structure. The single filament of the hollow structure is oil on the oil nozzle device, drafted and shaped, then the network is winded and formed by winding machine, finally checked, graded, and packaged to obtain the hollow curled HOY product.