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Can the fast food packaging box be put into the microwave oven for heating?
2018-09-21
It depends.Some plastic fast food boxes can be used.PP plastic boxes with triangle arrow marks on the outside of the plastic box and a number of 5 in the box can be used for microwave heating.Ordinary plastic fast food boxes made of other materials cannot be heated in the microwave oven,which will cause the container to deform,pollute the food,and is not conducive to human health.It is recommended to use porcelain,pottery,heat-resistant glass,polypropylene or polyethylene containers for microwave heating.
Working principle of microwave oven:
When microwave radiation is applied to food,there is always a certain amount of water in the food,and water is composed of ji molecules(the positive and negative charge centers of molecules are not coincident even when the external electric field does not exist).The orientation of this ji molecule will change with the microwave field.Because of this movement of the ji molecule of water in the food.As well as the interaction between adjacent molecules,a phenomenon similar to friction is produced,which makes the water temperature rise,so the temperature of food also rises.Because the food heated by microwave is also heated at the same time,the whole object is heated evenly and the heating speed is also fast.It heats 5 cm deep into the food at a frequency of 2.45 billion times per second to accelerate the molecular movement.
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