| abstract |
A polyester monofilament having a terminal carboxyl concentration of 10 equivalents/10⁶ g or less and containing 0.005 to 1.5 wt% of unreacted carbodiimide compound and 0.01 to 30% wt% of fluoropolymer. It may have a noncircular cross section such as a flat or multi-leaved one. Since it has excellent hydrolysis and stain resistances, when used in applications under the high temperature and high humidity conditions accelerating hydrolysis and staining, such as in papermaking dryer canvas, it is highly effective in lengthening the service life and particularly the cleaning cycle remarkably. |