一次性餐具主要由PP、聚丙烯、PS、聚苯乙烯等材料制成，无毒、无味、无臭。

Disposable tableware is mainly made of PP, polypropylene, PS, polystyrene and other materials, non-toxic, tasteless and odorless.

PP是柔软的，一般的PP材料一次性食品盒的温度是-6度到+120度，所以特别适合热的食品，可以在微波炉中加热，甚至在蒸汽柜中烹饪。

PP is soft. The temperature of general PP disposable food box is - 6 ℃ to + 120 ℃, so it is especially suitable for hot food. It can be heated in microwave oven or even cooked in steam cabinet.

PS是坚硬透明的。一般用PS材料制作的一次性饭盒温度在75度左右，不适合盛热饭和热菜。而PS具有良好的低温性能，是冰淇淋的包装材料。

PS is hard and transparent. Generally, the temperature of disposable lunch box made of PS material is about 75 ℃, which is not suitable for holding hot rice and hot dishes. PS is the best packaging material for ice cream because of its good low temperature performance.

为了降低成本，有些饭盒是用PP做的，盒盖是用PS做的，优点是盒盖是透明的，而PS是硬的，所以可以用薄的材料来做，这样可以降低成本。但是，这种设计的消费者必须了解两种材料的区别，不要把整个午餐盒的盖子放进微波炉。