HEXANGULAR, OCTANGLE, OR CIRCULAR NYLON AND POLYESTER STRING OF A POLYLACTIC ACID-BASED POLYMER CONSISTING OF ULTRAHIGH MOLECULAR WEIGHT POLYETHYLENE AND CARBON FIBER IN THE MIDDLE OF A STRING FOR A RACKET

摘要

PURPOSE: A hexangular, octangle, or circular nylon and polyester string of a polylactic acid-based polymer is provided to absorb the vibration of a racket by absorbing the impact, thereby releasing the load on an elbow.;CONSTITUTION: A hexangular, octangle, or circular nylon and polyester string of a polylactic acid-based polymer is manufactured by a step of inserting 2-8 bundles of carbon fibers of ultrahigh molecular weight polyethylene into the middle core of a spring; a step of melt extruding a hexangular or an octangle nozzle(7) in a four-composite bi-functional or tri-functional mixing tank(4) at a melting point of 120-200°C; and a step of molding a filament in the molding refrigerant water(8) at 40-50°C and circular coating the same with a polymer resin.;COPYRIGHT KIPO 2013