Plastics are divided into different classes, and small triangulations are usually stamped at the bottom of the plastic container. The numbers in the triangle range from 1 to 7 and each number represents a plastic container with a specification
"01," and then you lose it
"01" is for pet (i. E. Polybiphenyl diethylene) and is most commonly used in the manufacture of bottled beverages such as mineral water, carbonated beverages, etc. Pet is often used as a bottle of beverages and sub-bottles, usually up to 65°c and up to 20°c, and is suitable for heating or freezing only, high-temperature liquids, or heating, deformable, with the melting of substances harmful to humans. It is well known that bottles of beverages made of this material do not contain hot water and are suitable for heating or freezing, and that high-temperature liquids or heating are susceptible to deformation and the melting of substances harmful to humans. At the same time, scientists have found that carcinogens may be released after more than 10 months of use. It is therefore recommended that empty beverage bottles be dropped and not used as water cups or storage containers. In order to avoid harm to health, there is no reward。
"02" does not recommend water-filling devices
“02” represents hdpe (high-density polyethylene), most of which is made of cleaning materials, plastic packagings containing ablution products or plastic bags commonly used in malls. There are also industrial items that can withstand a high temperature of 110°c and which can be used for food if indicated. Plastic containers containing cleaning materials and ablution products can be used again after careful cleaning, but often they are poorly cleaned and leave residuals, which turn into hotbeds for bacteria. Unlike other beverage bottles, 4l is marked with 02 on the base of the farmer's mountain spring. Although it appears to be much stronger than the usual mineral water bottle, it is not recommended for water-filling devices, and the potential for the long-term use of hazardous substances is high. The material itself is difficult to clean completely, and it is recommended not to recycle。
Don't let it get hot
“03” for pvc (pvc), commonly in raincoats, plastic film. Plastics made from this material are susceptible to the production of two toxic and hazardous substances: monomolecated vinyl chloride, which is not fully integrated in the production process, and harmful substances in plasticizers. These two substances are easy to detect when exposed to high temperatures and oils, and can cause cancer if they enter the human body inadvertently. So it's rarely used for food packaging. If it happens, don't let it get hot
Thermal melting occurs over 110°c for "04"
`04', i. E. Ldpe (low-density polyethylene), has less heat resistant materials for the protection of film, plastic film. Qualified pe-preservative film is thermally melted at temperatures above 110°c, leaving a number of non-combustible plastic formulations in humans. If the package is heated outside the food, the fat in the food is more likely to dissolve the harmful substances in the protective film。
"05" carefully used after cleaning
“05” represents pp (polypropylene), which is the only material that can be heated in a microwave and thus becomes a raw material for the production of microwave lunch boxes. High temperature tolerance of 130°c, melting point up to 167°c, with poor transparency, can be reused after careful cleaning。
`06 'exception of bubble-faced boxes in hot bowls
"06" or ps (polystyrene) is the material used to make bowls filled with bubble-faced boxes and fast-food boxes. It cannot be used for strong acids (e. G. Orange juice) or for strong alkaline substances, as it decomposes polystyrene (carcin) that is not good for humans. It's hot and cold, but it also releases chemicals because of high temperatures, so it's forbidden to heat the bubbles directly in the microwave
"07" carefully avoids "biphenol a"
“07”, representing pc and other categories of pc, is a material that is used extensively, mostly in the manufacture of bottled milk, space cups, etc., as the presence of toxic binol a is controversial. Theoretically, as long as, during the production of pcs, binol a is converted to a 100 per cent plastic structure, the product is completely non-existent, let alone released. However, there is no assurance from the manufacturer that the binol a has been fully converted, and therefore more attention needs to be paid to its use。
