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可降解的塑料袋还是奢侈品!

发布日期:2019-05-16 作者:www.jnsuliao.com 点击:

真正的可降解,也就是全降解,也就是化学意义上的合成,是指降解后,物质分子不再具有塑料的特征,成为完整能够被土壤消化的物质,并且不会对环境形成毁坏。目前,我国运用的是一种被叫做聚乳酸(PLA)的物质。说起我们平常喝的酸奶,大家就不会感到生疏了,酸奶的主要成分是乳酸,而聚乳酸就是以乳酸为原料消费出来的,属于纯自然的生物制品。而这只是一种,目前美、法、日等国度已开发应用农副产品为原料发酵消费乳酸,进而消费聚乳酸,比方从玉米、土豆、甜菜等纯自然生物中停止提取。
  Real degradability, that is, total degradation, that is, synthesis in the chemical sense, means that after degradation, material molecules no longer have the characteristics of plastics, and become a complete substance that can be digested by the soil, and will not destroy the environment. At present, our country is using a substance called polylactic acid (PLA). Speaking of yogurt we usually drink, we will not feel strange. The main ingredient of yogurt is lactic acid, and polylactic acid is consumed from lactic acid, which belongs to pure natural biological products. But this is only one kind. At present, the United States, France, Japan and other countries have developed and applied agricultural by-products as raw materials to ferment lactic acid and then consume polylactic acid, such as corn, potatoes, beet and other pure natural organisms to stop extracting.
济南方便袋
  从理论意义上讲,也只要以这样的原料消费出来的塑料袋,才称得上是真正的可降解,完整环保。目前的可降解塑料还是朴素品,任何一种新技术的研发和提高,能不能市场化,被群众所认可,有一个重要的权衡规范,就是它作为替代品是不是完整具备被替代品的质量。我国在这方面也做过很多努力,曾费很大代价搭建起这方面的项目小组和工厂,但都因各方面的缘由没有做成,一些技术人员被紧缩到相似于他所在机构这样的研发部门。所谓的全降解塑料制品,消费工艺请求高,边角废料糜费大,聚乳酸资料耐高温性能差也不断是一个难于处理的问题,暂时没有大范围提高的市场条件。
  In theory, as long as the plastic bags consumed with such raw materials are truly degradable and environmentally friendly. At present, degradable plastics are simple products. Whether the development and improvement of any new technology can be marketized or not is recognized by the masses. There is an important trade-off criterion, that is, whether it has the quality of substitutes as a substitute. Our country has also made a lot of efforts in this area, and has spent a lot of money to build project teams and factories in this area, but because of various reasons, some technicians have been contracted to research and development departments similar to his organization. The so-called fully degradable plastic products have high demand for consuming technology, waste of corners and corners, and the poor high temperature resistance of polylactic acid materials is also a difficult problem to deal with. There is no market conditions to improve in a large scale for the time being.