First, to reiterate, seven plastic models refer to seven recycling marks made by the plastics industry in the United States. Its main function is to be used as a recycling symbol to facilitate sorting and recycling, which does not represent the level of food safety.
The seven recyclable plastic signs are shown in the figure above.Respectively is the # 1 PET (polyethylene terephthalate glycol ester), HDPE (high density polyethylene), 2, 3 PVC (polyvinyl chloride), 4 (low density polyethylene), PP (polypropylene), 6, 5 PS (polystyrene), 7 other classes (mainly PC polycarbonate, PA nylon).
Among the seven signs, can be used as water cup or beverage packaging:
No. 1 (PET) : mineral water bottle, water bottle, etc. More than 70 degrees is easy to deform, so it can't be used for hot water, nor can it be basked in the car. In addition, after 10 months, it may release the carcinogen DEHP, so try not to use it over and over again. In particular, some frugal elderly people, accustomed to using old mineral water bottles for oil or wine, had better use glass bottles instead.
(PP) : 5 common soya-bean milk, yogurt, fruit juice beverage bottle, microwave oven boxes, etc. Because the PP material can withstand the high temperature of 167, the plastic containers made in no. 5 can be used in microwave oven and can be reused after cleaning. Therefore, the plastic bottle made by PP. 5 can be used for hot water and can be used many times, but it is not recommended for long-term use.
No. 7 (other) : PCS that are common in other plastics can be used for water cups. Basically the water cup that bazaar sells, space cup, basically be made with PC material. The famous American water cup brand Tupperware is also made of PC materials.PC material non-toxic, and can generally resistant to high temperature of 130 ℃. But different companies, the origin of A product or brand to produce PC quality difference, some PC material in the process of production may remain carcinogenic bisphenol A, so now countries are prohibited to directly use the PC material infant products.
The remaining bisphenol A in PC, the higher the temperature, the more release, the faster the speed. Therefore, use PC materials as little as possible for boiling water. If your cup is made of a PC, the following can reduce the risk: don't use it for heating, not direct sunlight. Don't use the dishwasher or the dishwasher. When used for the first time, rinse with baking soda and warm water, and dry naturally at room temperature.。
It can be seen that only the bottles made by PC 7 can be used as water cups for a long time, and in real life, we use it mainly.
However, it is advisable to use ceramic or glass materials for cups of hot water and brewed coffee tea at home.