Sep 23, 2024 · The former mainly includes five general engineering plastics: 聚酰胺纤维, 聚碳酸酯, 聚甲醛、改性聚苯醚及 热塑性的 polyester; the latter mainly refers to engineering plastics with heat resistance of more than 150°C, and the main varieties include polyimide, 聚苯硫醚, polysulfone, aromatic polyamide, polyarylate ...