Polyester resin blend and article formed from the same

Abstract

A polyester resin blend and a molded article formed therefrom are provided. The polyester resin blend exhibits excellent processability even if it contains recycled polyethylene terephthalate as well as virgin polyethylene terephthalate, and can provide high quality molded articles, especially by extrusion blow molding. In addition, it can be reused, and it is expected to be useful for providing continuously usable plastics that have been recently attracting attention. The polyester resin blend comprising polyethylene terephthalate; and a polyester resin having a structure in which an acid moiety derived from a dicarboxylic acid or a derivative thereof and a diol moiety derived from a diol are repeated, wherein the polyester resin comprises a residue derived from a branching agent having at least three functional groups, wherein the dicarboxylic acid or a derivative thereof comprises terephthalic acid or a derivative thereof, wherein the polyester resin comprises 5 to 19 mol % of a diol moiety derived from a comonomer other than ethylene glycol with respect to the total diol moiety, wherein the polyester resin comprises a diol moiety derived from isosorbide as the diol moiety derived from the comonomer, and the polyester resin comprises 0.1 to 15 mol % of the diol moiety derived from isosorbide with respect to the total diol moiety. The polyester resin has a processability parameter value of 2 to 15.