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首页> 外文会议>Regional Conference of the Polymer Processing Society >Polypropylene and Polypropylene-Elastomer Blends for Medical Packaging
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Polypropylene and Polypropylene-Elastomer Blends for Medical Packaging

机译：用于医用包装的聚丙烯和聚丙烯 - 弹性体共混物

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Due to the negative publicity of PVC, polypropylene is attracting increasing attention as an alternative material for flexible medical packaging. Propylene-ethylene random copolymers (PP-R) are usually the materials of choice as they are suitable for the preparation of retortable, transparent films and molded items, such as bottles and ampoules. External elastomers such as styrene-ethylene/butylene-styrene triblock-copolymers (SEBS) usually need to be added to achieve the desired softness of the final item. The influence of SEBS on the performance of PP-Rs and random-heterophasic polypropylenes (PP-R/B) were studied in detail. It was demonstrated that the toughness and the transparency of castfilms can be improved by modifying PP-Rs with SEBS (20-60 wt%). It could be shown that significantly less SEBS (~30%) is needed for PP-R/B materials to achieve the same performance as for PP-R versions. For some cases, even the parent PP-R/B material exhibited similar properties as the PP-R-SEBS blends. These results illustrate that PP-R/Bs are an attractive alternative to PP-Rs as they allow for a reduction in the amount of costly SEBS.
机译：由于PVC的负宣传，聚丙烯是作为柔性医用包装的替代材料的越来越多的关注。丙烯 - 乙烯无规共聚物（PP-R）通常是选择材料，因为它们适用于制备可旋转，透明薄膜和模塑物品，例如瓶子和安瓿。通常需要加入外部弹性体，例如苯乙烯 - 乙烯/丁烯 - 苯乙烯三嵌段共聚物（SEBS）以达到最终物品的所需柔软度。 SEBS对PP-RS和随机多相聚丙烯（PP-R / B）的影响进行了详细研究。结果证明，通过用SEBS（20-60wt％）改性PP-RS可以提高铸件的韧性和透明度。可以表明，PP-R / B材料需要显着较少的SEB（〜30％），以实现与PP-R版本相同的性能。对于某些情况，即使是母体PP-R / B材料也表现出与PP-R-SEBS混合物相似的性质。这些结果说明PP-R / BS是PP-RS的有吸引力的替代方案，因为它们允许减少昂贵的SEB的量。

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