As we all know, ordinary PP / PE plastics in the natural environment for hundreds of years under very difficult to decompose. Therefore, man-made plastic waste is produced recognized the very pollute the environment. However, the use of plastic is particularly wide, such as plastic toys, plastic bottles, plastic packaging, plastic bags, plastic ...... we live simply can not do without. Therefore, the invention of an environmentally friendly plastic on the environment especially meaningful.
What is the plastics it can be environmentally friendly? In fact, as early as a century ago, there is a kind of abbreviation of polylactic acid resin plastic material for the PLA is to be synthesized, the material of plastic products produced in the composting environment can be completely degraded into carbon dioxide and water. But then the production costs are too high, so did not eventually become plastic raw materials. But in recent years, new advanced technology allows the production of such synthetic resin material of polylactic acid significantly reduced the cost so that it can be gradually used to the actual blow molding, plastic, sheets and other grades of plastic products. The more common products at home and abroad for the one-off cups, cutlery, plates, plastic bags, cloth and so on. In theory as long as plastic, PLA can be used, called bio-plastic material to produce. At present only the U.S. and international companies in China have own technology to produce such material. The dominance of U.S. companies an annual output of far more than 10 million tons, and many countries have even introduced their raw materials and complete production lines. Unfortunately, our country only under well-known universities in Shanghai, a company independent technology, but generally not as strong domestic environmental awareness, so development is relatively slow and the unknown. So there are independent technology in China, many people of insight but never the United States Environmental Protection for processing imported PLA resin embarrassment.
While environmentally friendly green plastic, but the PLA is the main raw materials rich in starch such as corn and sugar crops. PLA resin usually requires 1 ton 2.3 tons of corn as raw material. The United States produce 10 million tons PLA, mean annual consumption of more than 23 million tons of food! People the U.S. is big country agricultural exports, consumption as we can afford it? And environmental protection than this price worth it? I consulted on this issue, a PLA plastic products with sales experience Greenlitz experts and materials science doctorates. He believes that this issue can not worry about being, as the time when food shortages, food prices will naturally rise, for the production of polylactic acid PLA plastic resin costs would increase, to some extent inhibited the needs of bio-plastic products. So the market itself will have some regulatory functions. In the long run, the traditional raw material for plastics from petroleum, a non-renewable resources, was out of the rule. The main components of polylactic acid or carbohydrate, nature of starch and carbohydrates like sugar more easily (and inexpensively) from the crops, especially maize in the acquisition. Hope that the technology can gradually change the food dependency situation.
Supermarkets in China a few years ago to ban free distribution of plastic bags, which can be solved only a small part of the problem, according to the author, observed that many people through the supermarket to buy things, they often forget own bag, but young people also do not care spend more money to buy a few bags hair. And abroad, such as the sale of a German supermarket checkout bags of 30 euro cents, about equivalent to 2.7 yuan, and the majority of ordinary Germans used to go to the supermarket to buy things with a cloth. Germans love their homeland, we are not the same? I would like, even if from now on, everyone in their daily lives have to be a caring people, great progress had enough.
Future environmental PLA plastic is not like a form of material, I think the future of green plastic is invisible in our hearts that the environmental awareness. Thank you to read. |
