Recycled polyethylene terephthalate yarn and recycled polyethylene terephthalate tire cord

Abstract

A method for producing a recycled polyethylene terephthalate yarn according to the present invention includes: melting recycled polyethylene terephthalate chips and spinning the melt through a spinning nozzle, thereby producing a spun yarn; and drawing the spun yarn in multiple stages using an apparatus including five or more sets of drawing godet rolls, followed by winding; wherein the recycled polyethylene terephthalate chips contain isophthalic acid in an amount of 1.0 mol % or less; wherein the drawing is performed at a draw ratio of 1.5 to 2.45; and wherein a fourth set of godet rolls among the five or more sets of drawing godet rolls has a speed of 5,500 m/min to 7,000 m/min. The recycled polyethylene terephthalate yarn produced by the production method has a tenacity of 8.5 g/d or more and a dimensional stability (E-S) of 11.0% or less.

Dependencies are inferred from the claim text.