熱封試驗(yàn)儀是用于測定軟包裝材料熱封性能的專業(yè)設(shè)備,通過精確控制溫度、壓力和時間參數(shù),模擬實(shí)際生產(chǎn)工藝條件,評估材料的熱封強(qiáng)度和密封完整性。
概述
熱封試驗(yàn)儀是用于測定塑料薄膜等包裝材料熱封性能的專業(yè)設(shè)備。它通過模擬實(shí)際生產(chǎn)中的熱封條件,確定材料的最佳熱封參數(shù),為生產(chǎn)線參數(shù)設(shè)置以及質(zhì)量控制提供重要依據(jù),確保商品在包裝、運(yùn)輸、貯存和消費(fèi)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(jù)試驗(yàn)要求,為樣品施加特定的壓力,設(shè)定規(guī)定的時間和溫度環(huán)境,使塑料薄膜封口部位達(dá)到粘流狀態(tài)。借助壓力讓兩層薄膜熔合為一體,冷卻后形成具有特定強(qiáng)度和密封性能的封口,從而完成熱封操作。
符合標(biāo)準(zhǔn)
國家標(biāo)準(zhǔn):
GB/T 2358-2022《塑料薄膜熱封強(qiáng)度試驗(yàn)方法》
GB/T 21302-2021《包裝材料熱封性能測定》
國際標(biāo)準(zhǔn):
ASTM F2029-23《醫(yī)療包裝熱封工藝驗(yàn)證》
測試應(yīng)用
(一)基礎(chǔ)應(yīng)用
包裝材料測試:適用于各類塑料薄膜、塑料復(fù)合膜、紙塑復(fù)合膜、共擠膜、鍍鋁膜、鋁箔復(fù)合膜等包裝材料的熱封試驗(yàn),能精準(zhǔn)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(jìn)行檢測,保障食品包裝在各環(huán)節(jié)中能承受外力,防止包裝開裂和內(nèi)容物泄漏。
(二)擴(kuò)展應(yīng)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(jìn)行測試,為材料在不同溫度環(huán)境下的使用提供參考依據(jù)。
技術(shù)參數(shù)
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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