PROCESS FOR HIGH SPEED, MULTI-END POLYESTER HIGH PERFORMANCE TIRE AND INDUSTRIAL YARN

摘要

This invention provides an improvement in a high speed process to produce high performance multi-end polyester yarn. The process is extruding molten polyester from a spinnerette to form filaments, then cooling, lubricating and advancing the filaments to a forwarding roll system at the speed of from about 1000 - 4000 meters per minute so that a partially oriented yarn is produced, then feeding the filaments from the forwarding roll system to a first draw roll system to partially draw the yarn, then feeding the partially drawn yarn to a second draw roll system having a draw point localizing device then feeding the filaments from the draw roll system to a conditioning roll system and finally taking up the filaments. The improvement is the use of matte finish on godet rolls having an arithmetic mean roll surface roughness value of from between about 35 microinches and about 120 microinches to feed and withdraw yarn to and from a draw point localizing device in the second draw roll system. This combination enables multiple ends of the filaments to be advanced through a single set of forwarding, drawing and conditioning rolls and yarn mechanical quality remains at a high level of acceptance.