Plastics Solid materials made from synthetic resins, haveng appreciable mechanical strength, which at a suitable stage of manufacture can be cast, moulded or polymerised directly to a shape.

• 用合成树脂制成的固体一物料。它具相当的机械强度,在适当的生產阶段,可以依照模型铸造或压造或直接聚合成形。