第 34 章 塑料制品业科技竞争力与发展潜力研究（讨论稿）执笔人：参加编写：参加讨论：提供资料：摘 要......................................................................................................................................5第一节 产业发展历史.....................................................................................................................6一、产值变化...........................................................................................................................6二、技术变化...........................................................................................................................7（一）天然高分子加工阶段...........................................................................................7（二）合成树脂阶段.......................................................................................................8（三）大发展阶段...........................................................................................................9三、市场变化.........................................................................................................................10（一）依赖进口阶段.....................................................................................................10（二） 自主开发阶段...................................................................................................11（三）市场现状.............................................................................................................11四、贸易变化.........................................................................................................................14（一）70 年代以前塑料依赖进口阶段........................................................................14（二）年实现基本自给.................................................................................................14（三）中国已经成为塑料产品出口大国.....................................................................14五、政策变化............
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