Plastics. Plasticized poly (vinyl chloride) (PVC-P) membranes for inground swimming pools. Reinforced membranes of nominal thickness equal to or greater than 1, 5 mm Plastics, Polyvinyl chloride, Plasticized polyvinyl chloride, Swimming pools, Membranes, Thickness, Reinforced materials, Appearance, Physical properties of materials, Dimensional tolerances, Mechanical properties of materials, Durability, Sheet materials