In our daily life, the plastic bags, plastic containers and other household food has become commonplace, in a variety of stores on the shelves, placed in plastic packaging of food everywhere. As we all know, plastic for packaging and food should be non-toxic. But sometimes people do not pay attention to this problem, pick up a plastic bag and use it for food, do not know this is harmful to the body. Because these plastic bags are toxic when plasticizers such as dibutyl phthalate and dioctyl phthalate are added in the manufacturing process, the stabilizer lead stearate is also toxic. Plus lead salt is very easy to precipitate, once into the human body will have a collection effect, a long time to poison people, so plastic products packaging and food storage to use special food bags, boxes, must not be used indiscriminately.
At present, the plastic packaging used in beverage products is generally PET plastic bottles, its heat-resistant to 70 degrees Celsius, only suitable for warm drinks or frozen drinks, high-temperature liquids, or heating is easy to deformation, there are harmful substances to the human body to melt out. Therefore, when the bottles are used up, they should be thrown away. They should not be used as water glasses or as storage containers to carry other things, so as not to cause health problems.
In order to avoid unqualified products as much as possible, experts have given some tips to identify inferior products: fast food boxes: generally speaking, qualified products have better gloss and brightness, pinch up a certain strength, hands can not tear, smell nothing.
And for people's favorite bowl of instant noodles boxes, fast food boxes, because contains PS, although heat-resistant and cold-resistant, but can not be put in the microwave oven, in order to avoid the release of chemicals due to high temperature, like microwave oven cooking instant noodles friends to pay attention. And can not be used for loading strong acids (such as orange juice), strong alkaline substances, because it will break down the body is not good for polystyrene, easy to cause cancer. Therefore, you should try not to pack hot food with fast food boxes. The only plastic container that can be put into the microwave oven is the PP microwave dinner box, which can be reused after careful cleaning.
Fresh-keeping film: PE film can be used safely, and PVC film should not touch oil, nor can it be heated. It should be used cautiously. The two kinds of film can be distinguished by burning method: in the process of burning, if the dropping oil and smoke is smaller, PE film is bigger, and PVC film is not dropping oil.
PC plastic is commonly used to make kettle, drinking cups and bottles. However, the safety of PC in bottles is controversial because it contains BPA. Many foreign countries, such as Canada, have banned BPA bottles. Theoretically, as long as bisphenol A is 100% converted into a plastic structure in the process of making PC, the product is completely free of bisphenol A, let alone released. However, if a small amount of BPA is not converted into a PC plastic structure, it may be released into food or beverages. Therefore, care must be taken to pay attention to the use of this plastic container. The residual bisphenol A in PC has higher temperature, more release and faster speed. Therefore, PC water bottles should not be used to hold hot water, so as not to increase the release rate and concentration of BPA (if any).
