Related topics: energy conservation and emission reduction focus on practical actions.
[Energy conservation and emission reduction focus on practical actions] How to use plastic wrap safely?
How to identify toxic plastic bags?
2008- 1- 16 14:45:0 1
Summary: People's Daily Window of Tianjin 65438+1 October 16: The China Municipal Government began to declare war on "white pollution": From June this year1,all plastic shopping bags in supermarkets, shopping malls, bazaars and other retail places must be clearly marked and used for free.
Judgment: How to identify toxic plastic bags?
From the appearance, it can be identified whether the plastic bag is toxic or not. Non-toxic plastic bags are generally milky white, translucent or colorless and transparent, elastic, lubricated by hand, waxy on the surface, flammable when exposed to open fire, and can continue to burn after leaving the fire without peculiar smell; Toxic plastic bags are turbid or yellowish in color and sticky to the touch. Non-toxic plastic bags have a small specific gravity, and when they are released after being pressed into the bottom of the water, they will soon surface; Toxic plastic bags are just the opposite; If you grab one end of the plastic bag with your hand and shake it hard, the person who makes a crisp sound is nontoxic, and the sound is stuffy and toxic.
Health experts emphasize that plastic will undergo chemical decomposition reaction at high temperature. Even food packaging bags that can be directly filled with cooked food after high temperature sterilization should be avoided as much as possible. Moreover, general food plastic bags cannot be used to hold high-temperature food, especially ultra-thin plastic bags (thickness below 0.025mm) are strictly prohibited to hold food. If there are non-food plastic bags containing direct food in the market, they will be severely investigated by relevant departments.
Regulation: Packaged food must be a special food bag that meets the standard.
According to Article 7 of the Measures for Hygienic Management of Plastic Products and Raw Materials for Food promulgated by the Ministry of Health, "recycled plastics shall not be used to process plastic tableware, containers and food packaging materials." In other words, plastic bags made of recycled plastics cannot be used to package food. According to experts, plastic bags for food must be special food bags that meet the standards. There are national standards for the production of plastic packaging products such as PET soft drink bottles and plastic bags, and their physical and chemical characteristics also have corresponding technical standards. However, the raw materials of disposable plastic bags are complicated, and a considerable part of them are made of recycled waste plastics. After being crushed and melted, these recycled raw materials are re-injected. In the production process, many chemicals such as anti-aging and coloring agents need to be added, but they are not disinfected or not completely disinfected, and they are likely to contain germs.
In order to ensure the quality and safety of food packaging, the General Administration of Quality Supervision, Inspection and Quarantine launched the market access system for plastic packaging, containers and tools for food last year. Since June 5438+1 October1this year, the state has fully implemented the market access system for plastic products, and all products that come into contact with food must clearly indicate the "food use" logo on their packaging or products.
Suggestion: Try to avoid packing cooked food in plastic bags.
According to reports, the plastic bags used by people now mainly include polyester, polyethylene, polypropylene, polystyrene and polyvinyl chloride, among which polyethylene and polypropylene are safe plastics and can be used to hold food. Most of the film plastic bags used in many restaurants are PVC, which can't package food. Using them to package fried dough sticks, hot porridge and hot pasta at about 90℃ just out of the pot may cause chronic poisoning, because unpolymerized vinyl chloride monomer in PVC resin will be harmful to human body.
Health experts stressed that in order to protect our health and environment, we should try our best to reduce the use of disposable plastic tableware, do not rely too much on plastic bags, use vegetable baskets or cloth bags, or use our own stainless steel or plastic lunch boxes. This is not only hygienic, but also environmentally friendly and will not harm our health. (Yi Ming Lei Lei)