As the use of plastic products in life becomes more and more widespread, the concerns of old friends have gradually increased. Can plastic lunch boxes be microwaved? Empty beverage bottles can be used to fill oil and spices? Use plastic bags for food, will be chronic poisoning? Is the coating in the carton packaging safe? Regular plastic products, is safe to give you a piece of mind first: as long as the regular qualified plastic products, are safe to use. If you look into it, you should first understand the classification of plastic products if you should use it. The usual plastic containers turned over to see, you will find that the majority of the bottom or side of the container, there are the following icons. No. 1 and No. 6: heat resistance is relatively poor, do not fill too hot food, not to mention direct heating, do not use repeatedly. No. 3: The plastic used in general plastic pipes. No. 4: able to withstand high temperatures of about 90 ℃, can also be well separated from water, used to pack food is very safe. No. 5: can withstand a high temperature of about 200 ℃, can be heated in the microwave oven, repeated heating will not be a problem. No. 7: The raw material of most baby bottles. Can empty drink bottles be filled with condiments? Yes, but it is not recommended. No. 1 plastic does have some small fat-soluble molecules, and if used for daily cooking oil, some substances will leach into the vegetable oil. Regular plastic products may leach out less substances, and it is not impossible to use it for oil, vinegar or soy sauce, but it is not recommended. However, glass bottles are a better choice than plastic bottles for drinks. How to use the packing box? Because the food temperature is usually not too high, so there is no need to give special consideration to heat resistance. Since some of the ingredients in plastic products are fat-soluble, if the food has a high content of fats and oils, it is very conducive to their leaching, which is not necessarily harmful, but not good either. It is recommended that it is best not to serve foods with a lot of grease, such as Mao blood wang, boiled sliced pork and other foods with a lot of oil, so do not put all the grease in the soup into the packing box. In addition, it is best not to use the packing box directly with the heating. Plastic bags for food, is it harmful? Not necessarily. Food packaging as long as the food hygiene standards to meet the national quality requirements, there will be no safety problems. There are many people in life to save or did not pay attention, will use “non-edible grade plastic bags” to fill the food. But whether poisoning is required to look at the amount of harmful substances leached, if occasionally used a few times, but do not worry too much about chronic poisoning. We recommend that you use plastic bags marked with the word “food-grade” for food. Plastic tableware can be microwave heating? The regular products will be clearly marked “microwaveable / prohibited”. 5 is the microwaveable, other numbered products, microwave heating is not recommended. Can regular plastic lunch boxes be heated in the microwave? No. Although plastic lunch boxes are also food plastic, they will still precipitate harmful substances under microwave conditions, so if you are using a microwave oven, it is best to use special microwave glassware. If you can’t tell what kind of material is used, it’s best to pour out the packed meals into a pot and heat them up, or pour them in a dish and then heat them up in the microwave. We now have in many large shopping malls or supermarkets, we have seen a lot of microwave heating box, like this lunch box, it is safer than the plastic lunch box into the microwave heating, but now there is such a situation, that is, there are now a lot of goods it is written in the microwave special logo, but it is also the existence of counterfeit goods So we have to pay attention to the trademark and production address of the product when we buy it. Can disposable packing boxes be put in the refrigerator? Use with confidence. There are rumors that: disposable packing boxes put in the refrigerator will dissolve plasticizer, plus the leftovers of nitrite, will make people cancerous. Commonly used plastic packing boxes, in the production process do not need to use plasticizers, and there is no danger of plasticizers exist. But the refrigerator is not a safe deposit box, leftovers should not be left too long is true. Paper packing boxes are safe? Now paper packing boxes are also very popular, such as pizza, burgers and other food packaging will be used. The coating inside the bucket of instant noodles also makes many people mutter. These paper boxes are lined with plastic film called “polyethylene coating”, equivalent to the previously mentioned No. 4 material. Its biggest advantage is that it can freely cope with cold and hot drinks, it can withstand high temperatures of about 0 degrees, but also a good water barrier, so it is also very safe to use to pack food. However, it is not recommended to put it directly into the microwave oven for heating.