Petkim (Turkish: Petkim Petrokimya Holding A.Ş.) is the leading petrochemical company of Turkey. Founded on April 3, 1965, the main plant complex is located in Yarımca, Izmit. From 1985 on a second complex has been constructed in Aliağa, İzmir.Specializing in petrochemical manufacturing, the company produces ethylene, polyethylene, polyvinyl chloride, polypropylene and other chemical building blocks for use in the manufacture of plastics, textiles, and other consumer and industrial products.