Triangle + Number + English Abbreviation - Each plastic container or plastic product has a small "ID card" at the bottom, which means that they use different manufacturing materials, but also on behalf of their use of different taboos.

 

Professors and professionals will solve the digital puzzle of plastic products, knowing that different numbers mean different things.

 

Plastic products have no shelf life.

 

In the eyes of many consumers, plastic products can be used for a long time because they are not easy to decay and metamorphose. But is there really no warranty for plastic products?

 

Consumers: no bad can continue to use.

 

Many large inductive supermarkets, such as the New World Supermarket in Dongcheng District of Beijing and the Ruicheng Shop in Letian Matt Country, are choosing plastic fresh-keeping boxes and other commodities. When asked whether plastic fresh-keeping boxes have shelf-life, many consumers are surprised to show that they have never paid attention to the shelf-life of plastic containers.

 

"Normally, I will not replace plastic containers at home regularly. When I bought this kind of raw material goods, I was interested in its quality, not bad, so as long as the plastic box is not deformed, but also can be used, I will not change. "A female consumer living in Daxing District of Beijing said that she had never paid attention to the shelf life of plastic containers and would only replace them if the goods were in doubt about their quality.

 

Store: goods are not marked.

 

Located in the New World Supermarket in Dongcheng District of Beijing and the Ruicheng Shop in Letian Matt Country, and other large inductive supermarkets, we randomly inspected several different brands of food boxes in the plastic kettle and lunch box counters. Besides the manufacturers and contact information marked by the national demand, we only saw the days when some brands would produce the products. The period was marked, but it did not indicate the shelf life of the plastic products.

 

"This plastic lunch box is not food, so there is no guarantee period. Commodities like this can usually be used for three or five years, just plastics do not stick or because of the high temperature caused by changes in shape, I think it can continue to use it. "A plastic lunch box promoters of Rui Tian Matt Rui store told reporters.

 

Prof: there are no rules in the country.

 

"Most plastic products can not be reused for a long time, especially disposable plastic products can not be reused. Regarding the PP products that can be reused, the current state has not formulated the mandatory shelf-life. But because of the usage habits of many consumers, the simple formation of plastic fresh-keeping box yellowing, sticking, discoloration and other questions. Therefore, in order to use plastic products more safely, it is best to replace them after presenting the above queries. "

 

In addition, Miss Song shows that after long term use of plastics, there will be an aging problem. "Plastic aging refers to the plastic will be in the sun, temperature, pH and other environmental factors, with the extension of time, showing different ways, different degrees of chemical corrosion. Such as the appearance (extinction, discoloration, wrinkling) changes, mechanical functions (optical function, electrical function, component) changes, as well as changes in chemical layout and function. Because aging plastic containers have severe scratches, there is a good chance that harmful bacteria will remain, especially in PVC plastic containers rich in BPA. BPA is very simple to infiltrate into water and food when heated, washed or filled with acidic liquids. The more severe the scratches, the more BPA will leak out. In addition, the aging plastics because of the layout of the damage, it is very likely to be separated from low molecular substances, harm to the human body.