Unverified85% confidenceDecision RuleTime unknown
保温层需为EPP（发泡聚丙烯）或PU发泡填充，壁厚≥15mm才能实现6小时以上保冷；单层PE塑料桶（无发泡夹层）保冷仅1-2小时，仅适合短途携带
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85%
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Long-term
Relevance
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