What should you pay attention to when heating lunch boxes in a microwave?

Boxed lunches are a common food in daily life. Boxed lunches are not only easy to eat, but also very convenient and fast. They are very suitable for modern office workers. The only disadvantage of boxed lunches is that they cannot keep warm. Eating cold boxed lunches for a long time will easily lead to gastrointestinal diseases. Heating boxed lunches in a microwave is a common heating method. You just need to remove the plastic bag when heating.

What should I pay attention to when heating lunch boxes in the microwave?

You can cover it with a lid, but don't seal it completely. There should be room for it to breathe.

1. Avoid using ordinary plastic containers: Use special microwave containers to hold food and put it in the microwave to heat it. First, hot food will deform the plastic container. Second, ordinary plastic will release toxic substances, contaminate food, and endanger human health.

2. Avoid using metal utensils: because iron, aluminum, stainless steel, enamel and other utensils placed in the oven will produce electric sparks and reflect microwaves when the microwave oven is heating, which will damage the oven body and heat up uncooked food.

3. Avoid using closed containers: When heating liquids, you should use wide-mouth containers, because the heat generated by heating food in a closed container is not easy to dissipate, causing the pressure in the container to be too high, which can easily cause an explosion. Even when frying or boiling food with shells, you should pierce the shells with a needle or chopsticks in advance to prevent them from bursting after heating, splashing and dirtying the stove wall, or splashing on people.

4. Avoid overheating: If you put food in the microwave to thaw or heat it and forget to take it out, and if the time exceeds 2 hours, you should throw it away to avoid food poisoning.

5. Avoid fried foods: high-temperature oil may splash and cause fire. If a fire accidentally occurs in the furnace, do not open the door. Instead, turn off the power first and then open the door to cool down after the fire is out.

6. Avoid placing the microwave oven in the bedroom: Also, be careful not to cover the heat dissipation window grille on the microwave oven with objects.

7. Avoid working in front of a microwave oven for a long time: After turning on the microwave oven, people should stay away from the microwave oven or at least 1 meter away from it.

Because microwave lunch boxes generally use PP specially made for microwave ovens (polypropylene, which can withstand high temperatures of 120°C and low temperatures of -20°C), and due to cost, the lids are generally not made of special PP. When putting them in the microwave, the lid must be removed before use. Because most of the various bayonet-type fresh-keeping boxes use transparent PP instead of special PP, they generally cannot be used in the microwave. Use: The only plastic container that is microwave safe and can be reused after careful cleaning. It should be noted that some microwave lunch boxes are indeed made of No. 5 PP for the box body, but the lid is made of No. 1 PET. Since PET cannot withstand high temperatures, it cannot be put into the microwave together with the box body. To be on the safe side, remove the lid before placing the container in the microwave.

PP is heat-resistant up to 65℃ and cold-resistant down to -20℃. It is only suitable for storing warm or cold drinks. It is easy to deform when filled with high-temperature liquids or heated, and substances harmful to the human body may melt out.