Polyester hollow fiber spherical material

The present invention provides a polyester hollow fiber spherical material which is lightweight, has excellent bulkiness, is soft and has a feather-like texture, and can be used suitably as a filling material for cushions, down jackets and others. The polyester hollow fiber spherical material according to the present invention is a fibrous spherical material produced using polyester hollow fibers each having a single fiber fineness of 2.0 to 6.6 dtex, a hollowness ratio of 15 to 35%, a number of crimps of 2 to 8 crimps/25 mm, a percentage of crimp of 6 to 14% and a fiber length of 20 to 50 mm, and has a degree of bulkiness of 8,200 to 11,500 cm3/50 g inclusive. 本发明提供不仅轻量且具有优异的蓬松性、而且柔软且富有近似于羽毛的质地、适合用作垫子、羽绒服等的填充物原材料的聚酯中空纤维球状体。本发明的聚酯中空纤维球状体是使用单纤维纤度为2.0~6.6dtex、中空率为15~35%、卷曲数为2~8个/25mm、卷曲率为6~14%、纤维长度为20~50mm的聚酯中空纤维而得到的纤维球状体，蓬松度为8,200以上~11,500cm/50g以下。