Unverified78% confidenceDecision RuleTime unknown
适配书包时确认书包重量普遍在3kg以下用硬塑料架足够；书包常态超过4-5kg（如高年级教材多）应选铝合金或碳纤维，硬塑料在持续高负重下会疲劳弯曲变形
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78%
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Long-term
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Unverified无纺布挂袋单格承重通常≤2kg，塑料/PVC材质单格可达3-5kg，需存放重物（书籍、罐装物）时应选塑料或加固帆布材质88% similarUnverified承重需求＞10kg（如衣物、书籍）时选金属框或PP硬塑料筐，棉绳/无骨软筐承重通常＜5kg且久用会塌变形85% similarUnverified承重需求分层：仅隔置衣物、毛巾选塑料款（承重3-5kg足够）；放锅具、餐具、书籍等重物需选碳钢或不锈钢款（承重10kg以上），塑料款长期压重会中间下弯变形84% similarUnverified硬框（含内置支撑板或塑料骨架）打包块保形性好、堆叠不塌陷，但自重比软袋重约150-300g且不可压缩，登机箱7kg限重下应优先选软质压缩袋84% similarUnverified存放换季棉被、羽绒服等轻物选承重20-30kg塑料托盘即可；存放书籍、鞋子、瓶装物需承重≥50kg的金属框架或加厚PP托盘，否则底板会下凹变形84% similar
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