2, plastic materials are mainly divided into seven kinds, mainly according to the number in the triangle arrow on the plastic material to distinguish, the following do specific introduction:
(1) The plastic with the number 1 in the triangle arrow is made of PET, and pure water bottles and various beverage bottles are made of this material. This material can't be heated by microwave oven. At high temperature, the bottle will shrink and produce harmful chemical components.
(2) The plastic with the number 2 in the triangle arrow is made of HDPE, which is the material for bottles containing medicines, shower gel and detergent. Recycling is not recommended, let alone heating. It contains a large number of chemical components, and it is easy to produce chemical reactions under the action of high temperature.
(3) The plastic with the number 3 in the triangle arrow is made of PVC, which has low heat resistance and is easy to produce toxic and harmful components at high temperature, so it cannot be heated in the microwave oven.
(4) The plastic LDPE material with the number 4 in the triangle arrow is generally used to make plastic wrap, which has poor heat resistance and is easy to produce harmful substances when heated in the microwave oven, which will cause certain harm to the human body after eating.
(5) The plastic with the number 5 in the triangle arrow is made of PP, which has strong heat resistance and is not easy to generate chemical reaction when heated in the microwave oven, so it can be safely heated in the microwave oven.
(6) The plastic with the number 6 in the triangle arrow is PS. This material can not be heated at high temperature, otherwise it will produce toxic and harmful chemical components, which will easily form polystyrene and affect health.
(7) The plastic with the number 7 in the triangle arrow is made of PC, which is mostly used to make baby bottles and space cups. It contains polyphenol A, which may react with other substances after heating to produce substances harmful to human body.