There is provided a polyester fiber which has few defects such as voids due to catalyst particles, and low variation in physical properties and minimal fluff generation. The polyester fiber of the invention comprises laminar nanoparticles composed of a divalent metal and a phosphorus compound and having side lengths of 5-100 nm and an interlayer spacing of 1-5 nm. There are also provided a tire cord, tire, belt-reinforcing fiber material and belt, comprising the polyester fiber.
本发明提供了一种聚酯纤维,其缺陷很少,如催化剂颗粒造成的空隙,物理性能变化小,绒毛产生量极少。本发明的聚酯纤维包括由二价
金属和
磷化合物组成的层状纳米颗粒,其边长为 5-100 纳米,层间间距为 1-5 纳米。此外,还提供了一种由聚酯纤维组成的轮胎帘线、轮胎、带增强纤维材料和带。