Disposable lunch boxes are widely used, and their use is increasing. Office workers and students are the main people who use disposable lunch boxes. The reporter learned that most people know that disposable lunch boxes have many disputes whether from the perspective of health or environmental protection. However, they will always use them for their convenience.

现今市面上的一次性餐盒并不是全都符合国家标准，长期使用不合格的餐盒是会对身体带来不好影响的，自备饭盒才是选择。用塑料制成的一次性餐盒主要有PP聚丙烯和PS聚苯乙烯两种，均无毒牲，无味无嗅，PP较柔软。

Nowadays, the disposable lunch boxes on the market are not all in line with national standards. The long-term use of unqualified lunch boxes will have a bad impact on the body, and self-contained lunch boxes are the choice. Disposable lunch boxes made of plastic mainly include PP polypropylene and PS polystyrene, which are non-toxic, tasteless and odorless, and PP is soft.

一般PP使用温度是-6度至+120度，所以特别适合盛装热饭热菜，可在微波炉里加热，甚或可在蒸气柜里蒸煮，改性的PP其使用温度可控制在-18度至+110度，这种PP所制成的饭盒除了可加热至100度使用外，更可放入冰箱冷藏使用。

Generally, the service temperature of PP is - 6 ° C to + 120 ° C, so it is especially suitable for holding hot meals and dishes. It can be heated in the microwave oven or even boiled in the steam cabinet. The service temperature of modified PP can be controlled from - 18 ° C to + 110 ° C. In addition to heating to 100 ° C, the lunch box made of PP can be put into the refrigerator for refrigeration.

PS较硬，且透明，但易撕裂，PS在使用温度达75度时开始变软，所以不适宜盛装热饭热菜，但PS的低温性能很好，是冰淇淋好的包装材料。有些饭盒工厂为了降低成本，用PP做盒子，用PS做盒盖，好处是盖子透明，且PS较硬，可以用较薄片材制成，降低成本，但这种设计消费者一定明白两种材料的差异，切记不要把整盒饭连盖子一并放入微波炉中加热。

PS is hard and transparent, but it is easy to tear. PS starts to soften when the service temperature reaches 75 degrees, so it is not suitable for hot rice and dishes, but PS has good low-temperature performance and is a good packaging material for ice cream. In order to reduce the cost, some lunch box factories use PP as the box and PS as the box cover. The advantage is that the cover is transparent and PS is hard. It can be made of thinner sheets to reduce the cost. However, consumers must understand the differences between the two materials and remember not to put the whole box of lunch with the cover into the microwave oven for heating.