据英刊《材料工程与科学》1993年第4期报道,英国工业联合的两家包装公司的科研人员在回收利用广泛用于食品和饮料包装的聚对苯二甲酸乙酯塑料(PET)方面取得了重大突破。他们采用“三明治”法将回收的废塑料夹于两层新的PET塑料中间,这样既回收了旧塑料又不会污染食品和饮料。科研人员在生产这种“三明治”式复合塑料时,有意识地让中间的废PET塑料多带一些各种各样的污 According to the British edition of Journal of Materials Engineering and Science, Issue 4, 1993, researchers at two British Union Packaging Industries companies are recycling polyethylene terephthalate plastic (PET) that is widely used in food and beverage packaging Made a major breakthrough. They use the “sandwich” method to trap the recycled waste plastic between two new layers of PET plastic, which recycles the old plastic without contaminating the food and beverage. Researchers in the production of this “sandwich” type of composite plastic, consciously let the middle of waste PET plastic with a number of a variety of pollution