前言２０世纪９０年代以来，世界各国塑料包装材料的发展十分迅速。据有关资料报道，欧洲食品工业年均增长率为１％，而塑料包装材料却增长７％。１９９４年食品包装用塑料占塑料总产量的２８．５％，预计２００２年将达到５２％。由此可见，塑料包装材料的生产和应用正在以史 Preface Since the 1990s, the development of plastic packaging materials in various countries in the world has been very rapid. According to the information reported that the European food industry average annual growth rate of 1%, while the plastic packaging materials but increased 7%. Plastic food packaging in 1994 accounted for 28.5% of the total plastic output is expected in 2002 will reach 52%. Thus, the production and application of plastic packaging materials are taking history