Unverified88% confidenceDecision RuleTime unknown
涤纶+氨纶（锦纶）高密度织物的物理防晒最耐久，水洗数十次UPF不衰减；靠涂层或后整理助剂实现防晒的产品洗5-10次后防护力大幅下降，儿童衣物洗涤频繁应避开
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88%
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Unverified只标注UPF数值但无水洗次数说明的防晒衣要警惕：涂层型防晒衣（后整理喷涂二氧化钛）洗涤20-30次后防晒力显著衰减，纤维型（原纱添加防晒剂）耐水洗性更好，儿童衣物洗涤频繁应优先选纤维型91% similarUnverified物理防晒（高密度织物结构）比化学涂层防晒更耐洗，涂层型防晒衣洗涤20-30次后UPF值会明显衰减，儿童衣物洗涤频繁应优先选原纱型/物理防晒91% similarUnverified化学涂层防晒（后整理喷涂）水洗20-30次后UPF会明显衰减，原纱防晒（纤维本身含防紫外线成分如钛白粉）耐洗性更好，婴幼儿高频换洗应优先选原纱型89% similarUnverified物理防晒（高密度机织或含钛/锌涂层）耐久性强，可水洗数十次不衰减；化学助剂型（涂层吸收剂）通常30-50次洗涤后防晒力显著下降，认准'防晒因子织入纤维'而非表面涂层88% similarUnverified涤纶/尼龙原纱型防晒(如凉感纤维织入)水洗50次后防晒不衰减；后整理涂层型防晒衣水洗20-30次后UPF明显下降，长期使用选原纱型87% similar
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