The application range of plastics is also becoming wider and wider, and various new technologies and new applications of self-sealing bags are emerging one after another. Recently, researchers at Warwick University in the United Kingdom have developed a simple and cheap new conductive plastic composite material, which will enable people to print their favorite personal electronic products at home according to their own design intentions, so as to reduce the generation of unnecessary electronic waste. . Researchers at the University of Manchester use plastic optical fibers to woven into a magical carpet. The plastic bag factory can know in advance the information that the elderly will fall, thus preventing the tragedy from happening. Bank of Canada issued a number of plastic coins worth $100. This currency is made of special polymers, and the anti-counterfeiting method is more advanced, durable and not easily damaged.