How Much Do You Know About Plastic Bags
Buying breakfast, beverage, fruit, snack and so on, one person might use about ten plastic bags during an ordinary day. Food, especially cooked food, gets easy to go bad if packaged by plastic bag. It is discovered by medical field that plastic bag itself gives off toxic gas, when the toxic gas is long accumulated in the bag, its density increase and do special harm to children’ health.
Except for physical influence to people, plastic food bag also cause harm to eco environment. PE and other material plastic bags are synthetic polymers whose molecular structure is quite stable. Natural light, heat, bacteria or even enzyme can hardly break down the plastic food bag. It won’t break down even buried in the earth for 300 years. Burning is either a good solution. Large quantities of waste plastic stacks lead serious pollution to farmland and rivers, destroying the eco environment we live with.
What kind of plastic bag is toxic?
Nowadays the plastic bags we use are mainly polyester, polyethylene, polypropylene, PVC, polystyrene and so on. Most PVC is toxic for food containing.
Currently in the market, PVC plastic bags are mostly used. Black, red, blue and other dark colored plastic bags are reproduced from recycled waste plastic, and could do great harm to human health.
How to distinguish whether the plastic bag is toxic?
Sense: nontoxic plastic bag is milk white, semitransparent or transparent, feels lubricate. Toxic bags are not transparent or show faint yellow, feels sticky.
Water: put the bag in water and press it to the bottom, nontoxic is relatively lighter and will emerge to the water surface. Toxic plastic bag will sink in the water.
Voice: grab the bag and shake it fiercely, the one makes clear and crisp voice is nontoxic.
Burning: nontoxic PE plastic bag is flammable, its fire is blue and give off little smoke. Toxic PVC plastic bag is not easy to flame and the fire is yellow, it gives off pungent smell when burning.