Unverified80% confidenceFactTime unknown
有效期与包装形态强相关：普通无纺布袋装草本包挥发快，实际有效驱虫期约30-45天；带内层密封铝箔+外层透气棉布的双层结构可延长至60-90天，开封后按标注计算而非生产日期
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80%
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Long-term
Relevance
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Unverified带独立密封铝箔包装的谷物棒保质期普遍达9-12个月，散装/纸盒分隔装受潮后酥脆型迅速变软，办公室/户外常备优先独立铝箔包装84% similarUnverified泡腾片/独立铝箔包装拆封后需在几天内用完并受潮失效快，散装瓶装开封后有效期缩短；长期备用应选整版铝箔独立密封包装84% similarUnverified开封后建议2-4周内用完，长期未用完的大包装即使密封也应丢弃，防腐体系温和的纯水湿巾开封后保质期更短83% similarUnverified包装密封性看开口设计：优选带硬质翻盖（可反复扣合）而非仅贴纸封口，贴纸多次撕贴后失去密封性导致后半包干硬；抽取式软包建议20抽内小包装，开封后2周内用完83% similarUnverified单片独立铝箔密封包装的湿润度保持优于软塑封包装，铝箔封装开封前湿润度可维持18-24个月，塑封抽取式开封后一周内易干燥83% similar
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