Unverified82% confidenceFactTime unknown
防水面料分两类：涂层PU防水（初期防水好但涂层会随折叠反复摩擦脱落，2-3年失效）和硅涂层(Silnylon，更耐久但价格高)。真正防水还需看拉链是否为防水拉链或有压胶接缝，普通折叠包只是'防泼水'不能防暴雨
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82%
Confidence
Long-term
Relevance
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Unverified宣称"防水"的PU/涂层材质仅防泼溅，接缝和拉链处仍会渗水；真正防水需焊接密封边+防水拉链，普通证件包不应期望浸泡级防护88% similarUnverified宣称防水的收纳包区分'防泼水'和'真防水'：涂层款仅防轻微溅水，真防水需看接缝是否压胶（热熔胶条）；仅贴身防雨或分装湿衣物才需真防水86% similarUnverified防泼水看两层：面料涂层（PU/涂硅）应对小雨，但拉链未做防水压胶或无防水拉链的，暴雨中内容物仍会浸湿；标注YKK止水拉链才是真防水86% similarUnverified防水性能看两点：面料防泼水(涂层/尼龙)只能应付小雨，真正防雨需拉链有防水条或配防雨罩；宣称防水但拉链无遮挡的仍会渗水86% similarUnverified防水材质优先选涂层尼龙或PU防泼水面料，外层带防泼水+内衬防水贴合可防漏奶漏水；帆布材质好看但吸水易发霉不适合装液体86% similar
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