No, plastic lunch boxes release toxic substances when heated in the microwave.
Plasticizers can enhance the flexibility of plastic, and make it easier to process, plastic has been widely used in industry. Each plastic has its heat resistance limit, among the materials used in food, the most heat-resistant polypropylene (PP) can withstand 140℃, followed by polyethylene (PE) can withstand 110℃, and polystyrene (PS) can only withstand 90℃. The microwave oven that sells at present is a special plastic lunch box, basically using PP or PE to be made, if the temperature exceeds their heat-resistant limit, plasticizer has the possibility of release, should avoid to heat up food with high-temperature plastic lunch box for a long time so.
According to investigations, plasticizers can interfere with the endocrine system of the human body, and affect the reproductive system of the human body, especially in men. Animal studies have shown that long-term large intake of plasticizers may damage the liver and kidney and affect growth.
Expired plastic will be aging, discoloration, and brittle situation, such as the discovery the use of plastic box yellow or no longer transparent, which should be replaced as soon as possible. Therefore, there are always online people who say, "Plastic lunch box used for a long time, the internal will appear uneven, lost part of the bad will be eaten into the stomach." So, consumers must pay attention to the shelf life of plastic products. At the same time, aging plastic may release substances that can be harmful to humans. As for how long the "life" of a plastic lunch box can be, it depends on personal use and cleaning methods. The shelf life of most plastic products is generally about three to five years. If it is used frequently, it is better to replace it with one to two years.
Need to be vigilant, we now have in many large shopping malls or supermarkets, we have seen a lot of microwave special heating boxes, like this kind of lunch box, it is safer than the plastic lunch box in the microwave oven heating, but now there is such a situation, That is, now there are a lot of goods it is written in the microwave oven special logo, but there are counterfeit goods, so we should pay attention to the product's trademark and production address when buying.