Significance of plastic recycling sign

National standard refers to ISO 1 1469? According to the international standard of "Identification and Signs of Plastic Products" in 2000, plastic raw materials used in plastic products include general plastics, engineering plastics, functional plastics, degradable plastics, antibacterial plastics and recycled materials. , should be identified and marked. The new national standard has also added more than 200 kinds of labels and signs of plastic raw materials, increased the requirements for labels and signs of food packaging plastics and medical plastics, especially added the functions and supplementary explanations of labels, and required that the proportion of recycled materials in raw materials must be indicated. It is particularly worth mentioning that the logo pattern required by the national standard is vivid and more humanized. For example, having two arrow patterns in opposite directions means that the product can be reused. As long as people with similar patterns have primary education level, they can judge the' origin' and' destination' of plastic products in their hands from these concrete and vivid signs. This simple and clear label solves the difficulty for people to identify plastic materials, which can not only promote the classification and collection of waste plastics, but also save manpower, material resources and funds needed for classification and sorting, and has far-reaching significance for reducing the treatment capacity of domestic garbage and eliminating "white pollution". In daily life, it is often found that beverage bottles and mineral water bottles are reused. Many consumers often like to keep their used beverage bottles and mineral water bottles, and then fill them with tea or drinking water when they go out next time, and openly call this "environmental protection" and "saving". Dong Jinshi said that qualified beverage bottles and mineral water bottles require the use of food-grade plastics, that is, PET bottles. These food-grade PET bottles can't withstand high temperature and need to be used at low temperature. Generally speaking, it is safe to use below 70 degrees Celsius. In addition, these plastic bottles are disposable, and the state stipulates that enterprises cannot recycle and reuse them.

Professor Jiang Zhuoqin, director of the Department of Nutrition, School of Public Health, Sun Yat-sen University, also pointed out that plastic bottles are made of plasticizers and are toxic to human body. If drinking water, oil, wine and other substances are packed in plastic bottles for a long time, it is easy to dissolve the harmful substances inside and bring them into the human body. He suggested that it is relatively safe to use bottles made of glass, stainless steel and other materials to package food.

The number at the bottom of the plastic bottle has nothing to do with safety.

It is rumored that some plastic bottles are safe and can be reused, but whether plastic bottles can be safely reused can be identified by the sign on the bottom of the bottle. Some netizens on the Internet said that many beverage bottles, mineral water bottles and so on have a triangle sign with an arrow at the bottom, and there is a number in the triangle. If the number is "05" or above, it can be recycled, and the larger the number, the safer it is. "Generally, the bottom of mineral water bottles is marked with 01; Generally, the bottom of the plastic heat-resistant cup for making tea is marked with 05; The bottom of the cream bottle is marked with 02; The bottom of the yogurt bottle is marked 02 ... "As soon as this post was issued, it caused a heated discussion among netizens. Some people agree, while others doubt its truth.

The number marked on the triangle at the bottom of the plastic bottle has nothing to do with whether the bottle is safe or not. The triangle symbol is a symbol of plastic recycling. There are 1 ~ 7 numbers in the triangle, and each number represents a different material. If the product is made of several different materials, mark the main and basic materials of the product. It is not mandatory to mark the recycling mark on plastic products. In order to facilitate the recycling of plastic products, some formal big brand enterprises have recently begun to mark recycling signs. Experts believe that although this sign is mainly for the convenience of recycling, consumers can also know what materials the plastic products used are made of and under what environment they should be used.