There are disclosed polyester fibers that are composed of at least 90% by weight of poly(trimethylene terephthalate) and have a limiting viscosity of 0.4-2, being characterized by containing a phosphorus compound at 10-250 ppm in terms of weight of elemental phosphorus, containing no more than 3 wt% of cyclic dimers, containing no more than 2 wt% of bis(3-hydroxypropyl) ether copolymerized with the poly(trimethylene terephthalate), and having a birefringence of 0.03 or greater.
The polyester fibers are poly(trimethylene terephthalate)-based fibers with excellent whiteness and tenacity, which are obtained by melt spinning of poly(trimethylene terephthalate) resin composition with improved whiteness, melt stability and spinning stability. The polyester fibers of the invention have satisfactory processability and can be mixed with stretch fibers and the like to provide fabrics having functions that cannot be obtained with commonly used polyester fibers and nylon fibers, for various types of clothing products and the like.
已公开的聚酯纤维由至少 90%(重量)的聚
对苯二甲酸三甲酯组成,其极限粘度为 0.4-2 的聚酯纤维,其特征是含有 10-250 ppm
磷元素重量的
磷化合物,含有不超过 3 wt% 的环状二聚体,含有不超过 2 wt% 与聚(
对苯二甲酸三甲酯)共聚的双(3-羟基丙基)醚,并且具有 0.03 或更大的双折射。
聚酯纤维是白度和韧性极佳的聚
对苯二甲酸三甲酯基纤维,它是通过熔融纺丝聚
对苯二甲酸三甲酯树脂组合物获得的,白度、熔融稳定性和纺丝稳定性均有所提高。本发明的聚酯纤维具有令人满意的加工性,可与弹力纤维等混合,提供具有常用聚酯纤维和尼龙纤维无法实现的功能的织物,用于各类服装产品等。