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拉伸膜的透氣性
日期:2020-11-10 14:46:34 來源:宏展包裝

就宏展拉伸膜包裝制品而言,透氣性主要是用氣體的通過量和氣體通過系數來表達的,對此事應當怎么檢查呢?

拉伸膜

在檢驗拉伸膜的透氣性時,要嚴格把控溫度的恒定。在測試過程中的脫氣、透氣都需要用相當長的時間,對低壓室內壓力的檢驗應在實現平穩通過后才能夠統計。另外測試檢驗過程是在兩高、低壓室的壓力差條件下開展的,因此為了能確保檢驗測試數據的精確性,一定要留意工作儀器中各系統的密封性,如此一來才可以。

我們可以認真了解一下,氣體通過量指的是在恒定溫度和單位壓力差作用下,當平穩通過時,單位時間內通過被檢驗薄膜單位總面積的氣體體積;而氣體通過系數就是指在恒定溫度和單位壓力差下,當平穩通過時,單位時間內通過被檢驗薄膜單位厚度、單位總面積的氣體體積。

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