在设计挤压式塑料包装瓶时，如果材质为高密度聚乙烯或聚丙烯，塑料包装瓶的横截面应为矩形或椭圆形，对于材质为低密度聚乙烯或其他柔性塑料包装瓶，其横截面以圆形为好。这样便于内容物从塑料包装瓶内挤出。与塑料包装瓶口配合使用的塑料件主要为瓶盖和密封器。塑料包装瓶口的设计应重点考虑如何使塑料包装瓶口能更好地与盖和密封器配合。塑料包装瓶的底部是塑料包装瓶力学性能的薄弱部位。因此，塑料包装瓶的底部一般设计成内凹形；塑料包装瓶的转角处，及内凹处，均做较大的圆弧过度。为便于塑料包装瓶的堆放，增加塑料包装瓶的堆码稳定性，塑料包装瓶的底部应设计内凹槽。

100ml疫苗瓶

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