Low surface energy of polyethylene terephthalate (PET) film leads to poor adhesion of inks, paints and many other surfaces. Being able to change its surface properties during its processing will provide more uniformity, stability and commercial benefits by eliminating extra post-processing step. The objective in this study was to modify the surface properties of PET for better surface hydrophilicity and roughness through blending. A novel and simple approach through blending was developed. Blending was performed using twin-screw extruder, followed by film extrusion. The approach consisted in using a three components blend: PET is the major phase, the other two polymers were added at much lower contents (generally 5% or less each). One of the two additives should have a good hydrophilicity (polyethylene glycol, PEG). The second additive was polystyrene (PS) and served to increase the migration rate of PEG to the surface. This novel method was used since short PEG chains were depleted from the surface of the PET-PEG blend during the cooling process. High molecular weight PS, as an incompatible polymer with PET, stabilized PEG molecules at the surface. Surface enrichment of PEG was observed at the polymer/air interface of whereas for the PET-PEG binary blend, more PEG was distributed in the bulk of the sample. In order to roughen the surface of PET film, a small amount of poly (hyroxyl ether) of bisphenol A (Phenoxy resin, PKHH) was used to change PS/PET interfacial tension. The compatibilizing effect of PKHH caused the formation of smaller PS droplets, which were able to migrate more easily through the PET matrix.