RECYCLE POLYESTER COMPLEX HOLLOW FIBER HAVING IMPROVED BULKY PROPERTY, AND THE PREPARING THEREOF

摘要

The present invention is a melting step of melting the waste polyester in an extruder and controlling the melt flow index (MFI) of the melted waste polyester to form a high-viscosity polyester and a low-viscosity polyester; It relates to a recycled polyester hollow composite fiber with improved bulky properties and a method for producing the same, comprising a spinning step of spinning the high-viscosity polyester and the low-viscosity polyester into a side-by-side type hollow composite fiber through a spinning pack.