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是什麽因素影響了薄膜阻隔性能

2020/09/19 分類:行業資訊 1533 0

現在很多薄膜的阻隔性能非常的好，對食品、果蔬或者其他産品都起到了非常好的保護作用。那麽有哪些因素會影響到薄膜的阻隔性能呢?

首先是分子極性：當分子極性結晶到一定程度時，它們會因此緊密結合導致氣體在內部難以擴散。所以分子極性越大，透氣就越小，阻氣的性能也是越好。

其次是分子結晶性氣體和水蒸氣透過結晶性塑料薄膜所需要的擴散能量比非結晶性塑料薄膜高，擴散系數小，故結晶性塑料薄膜表現出較好的阻氣性。

在有是分子定向性塑料薄膜因成型時的拉伸而使塑料大分子受到不同程度的定向作用，成規則分布而排列緊密，薄膜阻隔性提高。

還有塑料薄膜中的親水性能中含有PVA、PA等親水性樹脂由于其強的吸水性可使樹脂溶脹，分子間距離增大可是阻隔性下降。

最後塑料薄膜的分子收到環境溫度的影響，當溫度升高時，樹脂的結晶度和定向度將會降低，分子的間距則會拉大，而密度也會大大的降低，這些最終都會導致塑料薄膜的阻隔性能也大大的降低。

以上是对于“是什麽因素影響了薄膜阻隔性能”的介绍，希望对您有所帮助，飞富润是一家专业生产各类高溫蒸煮袋、鋁箔袋、可降解包裝袋等的厂家，若您有需要的话可直接联系在线客服，获取相关资料。

本文轉載自泉州市飛富潤包裝彩印有限公司，轉載請注明出處：/1052.html

標簽:高溫蒸煮袋上一篇: 風量會對複合制品帶來哪些影響下一篇: 調整張力時會對制袋産生哪些影響呢

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