RIYADH: A new SR100 million ($26.59 million) plastics factory is set to be built in the Rabigh Plastics Technology Complex after Saudi Top Trading Co. signed a memorandum of understanding with Rabigh Refining and Petrochemical Co., also known as Petro Rabigh. The factory will be built in two phases, the first costing SR60 million while the second will cost SR40 million,