Patent ID: 6709689
Filing Date: 2004-03-23
Classification: B65H,D01F,D02J,Y10T

Abstract:
A package of poly(trimethylene terephthalate) drawn yarn that is a cheese-like package formed by winding a drawn yarn in a winding amount of 2 kg or more obtained by directly spinning and drawing a poly(trimethylene terephthalate) comprising 95% by mole or more of trimethylene terephthalate repeating units, the package satisfying the following requirements (1) to (4):(1) the drawn yarn shows a dry thermal shrinkage stress of from 0.01 to 0.15 cN/dtex; (2) the traverse angle is varied in accordance with a winding diameter of the package and selected from 3 to 10 degrees at each winding diameter, and the difference between the minimum and the maximum value thereof is at least one degree; (3) the diameter difference between the edge portion and the central portion of the package is 10 mm or less; and (4) the unwinding tension difference &Dgr;F (cN/dtex) during unwinding the drawn yarn having been wound into the package satisfies the following formula (1): &Dgr;F&lE;8.0Ã—10âˆ’6uâ€ƒâ€ƒ(1) wherein u is an unwinding speed (m/min).