Unverified80% confidenceDecision RuleTime unknown
冷冻食品(-18℃)运输必须使用干冰而非冰袋，且箱体需带透气孔防止干冰升华爆箱，选购时确认箱盖非完全密封结构或带压力释放阀
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80%
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Long-term
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Unverified冷藏（保鲜4-8℃）用普通凝胶冰袋即可；冷冻运输（-18℃保鲜肉类）需选用共晶点更低的专业蓄冷剂冰袋，普通冰袋无法维持冰点以下81% similarUnverified冰袋应放在食物上方而非下方，冷空气下沉可提升整体保冷效率，此为冷链运输标准做法80% similarUnverified运输海鲜、冰淇淋等需长时间强保冷的场景，不建议只买普通保温袋——需搭配专用蓝冰/冰袋（占容积20-30%），单靠保温层无法主动降温80% similarUnverified冷冻食物储存不要买普通PE自封袋，普通料在-18℃冷冻环境下会变脆开裂，应选标注'耐冷冻/加厚食品级'的PE款79% similarUnverified冷藏保鲜(0-8℃如蔬果、酸奶)选0℃或-5℃相变冰袋，避免冻伤食材；冷冻运输(如冰淇淋、冻肉)才需-18℃相变冰袋或干冰。用错温区会导致食材冻坏或化冻79% similar
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