01"- PET (polyethylene terephthalate)
Mineral water bottles carbonated beverage bottles are made of this material. Dong Jinshi pointed out that beverage bottles can not be recycled for hot water. This material is heat-resistant to 70 degrees Celsius. It is only suitable for warm or frozen drinks. It is easy to deform when filled with high-temperature liquid or heated, has the dissolution of substances harmful to human body. Scientists have found that after 10 months, the plastic products may release carcinogens, which are toxic to humans. Therefore, when the bottles are used up, they should be discarded. They should not be used as water cups or storage containers for other items.
"02" - HDPE (High Density Polyethylene)
At present, most plastic bags used in supermarkets shopping malls are made of this material, which can withsthigh temperature of 110 C, indicating that plastic bags for food can be used to hold food. Plastic containers for cleaning bathing products can be reused after careful cleaning, but these containers are usually not easy to clean, leaving the original cleaning products as hotbeds for bacteria, which are not thoroughly cleaned, it is best not to recycle.
"03" - PVC (polyvinyl chloride)
It is reported that the toxic harmful substances easily produced by the plastic products made of this material come from two aspects: one is the single molecule vinyl chloride which has not been fully polymerized in the production process, the other is the harmful substances in plasticizers. These two substances are easy to precipitate when they are exposed to high temperature grease. Toxic substances are easy to cause cancer when they enter the body with food. At present, the container of this material has been less used for packaging food. If used, do not let it be heated.
"04" - LDPE (Low Density Polyethylene)
Fresh-keeping film, plastic film so on are all made of this material. Thermal resistance is not strong. Usually, qualified PE fresh-keeping film will melt when the temperature exceeds 110 C, leaving some plastic preparations that can not be decomposed by human body. Moreover, when food is heated by wrapping it with a fresh-keeping film, the oil in the food can easily dissolve the harmful substances in the fresh-keeping film. Therefore, when food is put into the microwave oven, the wrapped fresh-keeping film must be removed first.
05"- PP (polypropylene)
Microwave oven lunch box is made of this material. It can withst130 C high temperature has poor transparency. This is the only plastic box that can be put into the microwave oven. It can be reused after careful cleaning. It should be noted that some microwave oven lunch boxes are made of No. 05 PP, but the lid is made of No. 06 PS (polystyrene). PS has good transparency, but is not heat resistant, so it can not be put into the microwave oven together with the box body. To be safe, remove the lid before putting the container into the microwave oven.
"06" - PS (polystyrene)
This is used to make bowl foam noodle boxes foam fast food boxes. It is heat-resistant cold-resistant, but can not be put into the microwave oven to avoid releasing chemicals due to excessive temperature. can not be used to dress strong acid (such as orange juice), strong alkaline substances, because it will decompose polystyrene, which is not good for human body. Therefore, you should try to avoid packing hot food in fast food boxes.
"07" - PC other classes
PC is a widely used material, especially for making milk bottles, space cups so on. In recent years, bottles have been controversial because they contain bisphenol A. Experts point out that in theory, as long as BPA is 100% converted into plastic structure in the process of making PC, it means that the product has no BPA at all, let alone released. However, if a small amount of BPA is not converted into the plastic structure of PC, it may be released into food or drinks. The higher the temperature is, the more the residual bisphenol A in PC is released the faster it is released. Therefore, hot water should not be filled in PC water bottles. If the container is damaged or damaged, it is recommended to stop using, because if there are slight pits on the surface of plastic products, it is easy to hide bacteria. Avoid repeated use of aging plastic appliances.