Plastic lunch boxes are often used by everyone, and if the meal is not finished, many people will use the microwave. So, can plastic lunch boxes be microwaved? For the sake of health, let's follow the editor to find out.
Generally speaking, plastic lunch boxes cannot be heated in a microwave oven, because the maximum temperature in the microwave oven is 100 ℃, and ordinary plastic lunch boxes will melt, so it cannot be; but if it is a lunch box marked with PP or PE, that is, polypropylene or poly The lunch box made of vinyl material can be heated in the microwave.
Reason: Polypropylene is the most heat-resistant material and can withstand a high temperature of 140 °C, so the lunch box made of polypropylene material can be heated in a microwave oven. The bottom of this type of plastic lunch box has the word PP; polyethylene can withstand a high temperature of 110 °C, so The lunch box of this material can also be heated in a microwave oven, and the bottom of this type of plastic lunch box has the word PE. Other plastic lunch boxes can withstand temperatures below 100°C, so they cannot be heated in a microwave oven.
Matters needing attention: Lunch boxes made of PP/PE can be heated in microwave ovens, but they also have a shelf life. Once they exceed the plastic, they will age, discolor and become brittle. At this time, they cannot be heated in microwave ovens, otherwise harmful substances released by aging plastics will occur. It will invade the food and endanger human health. Under normal circumstances, the shelf life of plastic lunch boxes is about 3-5 years. If they are used frequently, it is best to replace them every 1-2 years.
