熱封試驗儀是用于測定軟包裝材料熱封性能的專業設備,通過精確控制溫度、壓力和時間參數,模擬實際生產工藝條件,評估材料的熱封強度和密封完整性。
概述
熱封試驗儀是用于測定塑料薄膜等包裝材料熱封性能的專業設備。它通過模擬實際生產中的熱封條件,確定材料的最佳熱封參數,為生產線參數設置以及質量控制提供重要依據,確保商品在包裝、運輸、貯存和消費過程中,包裝能承受一定外力,不開裂、不泄漏。
測試原理
將待測樣品放置于上下熱封頭之間,依據試驗要求,為樣品施加特定的壓力,設定規定的時間和溫度環境,使塑料薄膜封口部位達到粘流狀態。借助壓力讓兩層薄膜熔合為一體,冷卻后形成具有特定強度和密封性能的封口,從而完成熱封操作。
符合標準
國家標準:
GB/T 2358-2022《塑料薄膜熱封強度試驗方法》
GB/T 21302-2021《包裝材料熱封性能測定》
國際標準:
ASTM F2029-23《醫療包裝熱封工藝驗證》
測試應用
(一)基礎應用
包裝材料測試:適用于各類塑料薄膜、塑料復合膜、紙塑復合膜、共擠膜、鍍鋁膜、鋁箔復合膜等包裝材料的熱封試驗,能精準評估這些材料在不同熱封條件下的熱封效果。
特定食品包裝測試:可對果凍杯、方便面等碗裝食品的包裝熱封性能進行檢測,保障食品包裝在各環節中能承受外力,防止包裝開裂和內容物泄漏。
(二)擴展應用
塑料軟管測試:能夠用于塑料軟管管尾的熱封性能測試,確保塑料軟管在包裝和儲存過程中的密封性。
耐熱性能評估:可對包裝材料的耐熱性能進行測試,為材料在不同溫度環境下的使用提供參考依據。
技術參數
溫度控制范圍 室溫-300℃
壓力精度 ±0.01MPa
時間控制精度 ±0.1s
熱封面溫差 ≤1.5℃(ISO 19403)
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