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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
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Unverified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92% similarUnverified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91% similarUnverified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90% similarUnverified物理遮蔽型防晒（高密织物+浅色）比涂层化学防晒更耐洗，涂层防晒裤水洗30-50次后UPF值会明显衰减，认准'纤维本身防晒'或'凉感锦纶'工艺89% similarUnverified防晒衣的防晒力主要靠面料密度和涂层/助剂，选原纱型防晒（如凉感锦纶+氨纶）比后整理涂层型更耐水洗，涂层型洗涤50次后UPF可能衰减30%以上89% similar
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