O número da marca de cada produto de plástico

O número da marca de cada produto de plástico

There are 7 kinds of numbers at the bottom of plastic bottles, which one is suitable for long-term use as a water glass?

First, to reiterate, the 7 plastic models refer to the 7 recycling symbols for plastic products developed by the relevant agencies of the U.S. plastics industry. Its main purpose is to serve as a recycling symbol to facilitate sorting and recycling, and does not represent a food safety rating. The seven recyclable plastics are marked as shown in the image above. In order are No. 1 PET (polyethylene terephthalate), No. 2 HDPE (high-density polyethylene), No. 3 PVC (polyvinyl chloride), No. 4 (low-density polyethylene), No. 5 PP (polypropylene), No. 6 PS (polystyrene), No. 7 other categories (mainly PC polycarbonate, PA nylon). In the seven signs, can be used as a water glass or beverage packaging: No. 1 (PET): mineral water bottles, soda bottles, etc. Above 70 degrees easy to deform, so can not be used for hot water, and can not be placed in the car in the sun. In addition, No. 1 bottles may release estrogen-like DEHP after repeated use for 10 months, so try not to use them repeatedly. Especially some frugal elderly people who are used to using old mineral water bottles to portion oil or wine, it is best to let them use glass bottles instead. 5 (PP): common soy milk bottles, yogurt bottles, juice drink bottles, microwaveable lunch boxes, etc. . Because PP material can withstand up to 167℃, plastic containers made of No. 5 can be used in microwave ovens and are cleaned and reusable. Therefore, No. 5 PP made plastic bottles can be used to hold hot water and can be used many times, but it is not recommended for long-term use. No. 7 (other): other plastics in the common PC is available to make mugs. Basically, the mall sells mugs, space cups, mainly made of PC material. The famous American mug brand Tupperware is also made of PC material, which is non-toxic and can generally withstand temperatures of up to 130 degrees C. However, different companies, origins or different brands of mugs use PC material. But different companies, origin or different brands of PC quality will vary, some PC materials in the production process may be residues of carcinogenic Bisphenol A, so now most countries have banned the direct use of PC materials for infant products. Bisphenol A residues in PC, the higher the temperature, the more release, and the faster. Therefore, try to minimize the use of PC materials for boiling water. If you use the mug is made of PC, then the following methods can reduce the risk: do not heat to use, not in direct sunlight. Do not use dishwasher or dish dryer to clean. When you use it for the first time, wash it with baking soda and warm water, and dry it naturally at room temperature. As you can see, only the bottle made of No. 7 PC can be used as a water glass for a long time, and in real life, we use it mainly. But it is recommended that the cups used to hold hot water and brew coffee and tea at home are best, The best cups for brewing coffee and tea are still made of ceramic or glass.