| 摘要 |
PROBLEM TO BE SOLVED: To provide wet heat-resistant recycled polyester fibers which little have the physical property value irregularity, although using a recycled polyester, hardly cause dyeing irregularity, even when dyed as a fabric, have excellent color tone, excellent hydrolysis resistance, little deteriorate grades and fiber quality performances, even when repeatedly used under the conditions of high temperature and high humidity, and can suitably be used. SOLUTION: The wet heat-resistant recycled polyester fibers comprising a polyester component containing a polyester prepared by repolymerizing low mol. wt. polymers obtained by depolymerizing a recycled polyester is characterized in that an antimony compound, a cobalt compound and a phosphorus compound in the fibers are contained in amounts simultaneously satisfying a specific expression, and a carboxyl terminal group concentration is≤25 eq/t. COPYRIGHT: (C)2007,JPO&INPIT
|
