Plastic dinnerware material type?
Disposable lunch boxes made of plastic mainly include PP polypropylene and PS polystyrene, both of which are non-toxic, tasteless and odorless. PP is relatively soft. Generally, the use temperature of PP is -6 degrees to +120 degrees, so special It is suitable for holding hot meals and hot dishes. It can be heated in a microwave oven or even steamed in a steam cabinet. The temperature of modified PP can be controlled from -18 degrees to +110 degrees. The lunch box made of this PP can be heated in addition to heating. It can be stored in the refrigerator and used for refrigeration.
PS is hard and transparent, but easy to tear. PS starts to soften when the temperature reaches 75 degrees, so it is not suitable for hot rice and hot dishes.
In order to reduce the cost, some lunch box factories use PP as the box and PS as the lid. The advantage is that the lid is transparent and the PS is harder. It can be made of thinner materials to reduce costs. However, consumers of this design must understand two materials Please remember not to put the whole box of lunch with the lid into the microwave oven for heating.