Complex Hollow Fiber Having Improved Bulky Property and fibrous assemblies using thereof

摘要

The present invention relates to a hollow composite fiber having enhanced bulkiness formed in a hollow-side-by-side structure comprising high-viscosity polyester (a) having an intrinsic viscosity of 0.64-0.90 and low-viscosity polyester (b) having an intrinsic viscosity of 0.40-0.68 containing pyromellitic dianhydride (PMDA), which is a multifunctional component.