Plastic bottles have a shelf life?

About plastic products, such as plastic bottle manufacturer, whether have any harm to human body, if there is a shelf life you say? Let's talk about this problem. Interviews with relevant experts, bottles, water bottles and other plastic reusable says there is no scientific basis of cancer, but if the long-term reuse plastic bottles there may be a hidden danger. Care for mothers milk bottle, also is the same, plastic bottle also has expiration, use when they need to pay attention to many problems. In addition to infants and young children in some large supermarkets can see bottle, plastic bottle label production date and shelf life, more than ninety percent of household have date of production accounted for only forty percent of plastic bottles. Plastic glass or plastic container, with production date and shelf life of the very few. Plastic products are made of different resin material, under the condition of different temperature and humidity will release toxic substances. Pledges inspect bureau ZhiJianSuo officials said, at present no unified standards in our country, the only industry standards. Foreign production of some of the bottle, although labeled shelf life for 10 years, but after repeated use, especially after the high temperature heating, will bisphenol A, releasing toxic substances, so try not to heat when using, don't direct drying in the sun. At present, our country adopts the triangle symbol as a plastic recycling symbol, can remind consumers from the material used correctly. Have a triangle at the bottom of the plastic bottles, punctuated with 1-7 number, each number represents a different material, said that the product is made of what kind of resin. Such as used in the manufacture of bottles, space cup of plastic products more annotation for 7 PCS, water bottles, carbonated bottle labeled 1.