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聚苯乙烯材料是１８３９年由E·Simon发明合成的。美国１９２５年后开始批量生产。这种材料的优点是价格便宜、表面光洁度好、与纸箱配套做内包装抗冲击性能较好、易于注塑成型、比重小，重量轻。缺点是脆、有静电、不易降解。聚苯乙烯泡沫分为两类：一是开孔性材料（厚板、圆?
Polystyrene material was invented by E. Simon in 1839. The United States began mass production after 1925. This material has the advantage of cheap, good surface finish, and supporting the inner package made of cardboard good impact resistance, easy injection molding, the proportion of small, light weight. The disadvantage is crisp, static, not easy to degrade. Styrofoam is divided into two categories: First, open-hole material (thick, round?