[0029] wherein HS is a numerical value calculated in the equation HS=0.245 {[IV]f2???1.47???[IV]i ???1.47}, from the intrinsic viscosity ([IV]f2) which is determined after melt-polymerized resin chips of PET having an initial IV ([IV]i) of about 0.65 dl/g are frozen and milled to give powders of 20 meshes or less which are then vacuum-dried at 130??? C. for 12 hours, and 1 g of the powders, togeth