[{"id": 1, "name": "PE", "density_g_per_cm3": 0.95, "description": "Polyethylene — the most common plastic, used in packaging, bottles, films.", "created_at": "2026-05-16T05:30:24.894892"},{"id": 2, "name": "PP", "density_g_per_cm3": 0.91, "description": "Polypropylene — used in food containers, bottle caps, straws.", "created_at": "2026-05-16T05:30:24.894896"},{"id": 3, "name": "PS", "density_g_per_cm3": 1.05, "description": "Polystyrene — used in disposable cutlery, foam packaging, insulation.", "created_at": "2026-05-16T05:30:24.894897"},{"id": 4, "name": "PVC", "density_g_per_cm3": 1.4, "description": "Polyvinyl chloride — used in pipes, flooring, some toys.", "created_at": "2026-05-16T05:30:24.894897"},{"id": 5, "name": "PET", "density_g_per_cm3": 1.38, "description": "Polyethylene terephthalate — used in beverage bottles, polyester textiles.", "created_at": "2026-05-16T05:30:24.894897"},{"id": 6, "name": "Nylon-6", "density_g_per_cm3": 1.15, "description": "Polyamide 6 (Nylon-6) — used in synthetic textiles, fishing nets, industrial fibres.", "created_at": "2026-05-16T05:30:24.894897"},{"id": 7, "name": "PLA", "density_g_per_cm3": 1.25, "description": "Polylactic acid — a biodegradable polyester used in 3D printing and compostable packaging.", "created_at": "2026-05-16T05:30:24.894898"},{"id": 8, "name": "PUR", "density_g_per_cm3": 1.2, "description": "Polyurethane — used in foams, sealants, coatings.", "created_at": "2026-05-16T05:30:24.894898"},{"id": 9, "name": "N66", "density_g_per_cm3": 1.14, "description": "Nylon-6,6 (Polyamide 66) — used in synthetic textiles, automotive components, and industrial fibres.", "created_at": "2026-05-16T05:30:24.894898"},{"id": 10, "name": "SBR", "density_g_per_cm3": 1.04, "description": "Styrene-Butadiene Rubber — used in tyre wear particles and road runoff.", "created_at": "2026-05-16T05:30:24.894898"},{"id": 11, "name": "PMMA", "density_g_per_cm3": 1.18, "description": "Polymethyl methacrylate (Acrylic) — used in paints, coatings, and acrylic glass.", "created_at": "2026-05-16T05:30:24.894899"},{"id": 12, "name": "PC", "density_g_per_cm3": 1.2, "description": "Polycarbonate — used in reusable bottles, electronics, and glazing.", "created_at": "2026-05-16T05:30:24.894899"},{"id": 13, "name": "ABS", "density_g_per_cm3": 1.06, "description": "Acrylonitrile Butadiene Styrene — used in 3D printing, automotive parts, and electronics housings.", "created_at": "2026-05-16T05:30:24.894899"}]