Chinese and American scientists have jointly developed a new technology that can significantly improve the heat and water resistance of biodegradable bioplastics - polylactic acid, which can reduce commercial production costs and reduce pollution. 　　The core step is to heat the polylactic acid fiber to about 200℃ and slowly cool it. By this way, the two polylactic acid molecules are interwoven and complexed to produce a product with higher heat resistance and water resistance.
　　The research team reported Chemical Engineering Magazine in Swiss that the heat treatment method would make the performance of bio-plastics comparable to petrochemical plastics, which is simpler and more green than the prior technology.
　　Researchers said they have understood the relationship between heat treatment temperature , the degree of steric solidification and the strength of finished plastic fibers, which has been achieved in small-scale production in the laboratory and are seeking to use t for existing industrial processes.