Unverified80% confidenceDecision RuleTime unknown
涂层型防晒面料(化学助剂涂层)首次穿着UPF高，但多次洗涤/氯水浸泡后涂层脱落防晒下降；应选纤维本身致密的物理防晒面料而非涂层款
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80%
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Long-term
Relevance
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Unverified防晒原理分两类：物理镀层（涂层型）防晒衣初期UPF高但洗涤30-50次后涂层脱落防晒衰减明显；原纱型（纤维本身含防晒助剂）耐洗性好，认准‘原液着色’或‘防晒纤维’标注91% similarUnverified防晒面料的UPF会随洗涤和拉伸下降，含二氧化钛等物理防晒整理的产品比纯化学涂层耐洗，反复拉伸的运动款优选原纱防晒工艺89% similarUnverified涂层型防晒袖套（表面有涂层增加UPF）透气性差、洗几次涂层脱落防晒失效；原纱型（纤维本身防紫外，如添加二氧化钛的锦纶）更耐洗持久，认准原纱防晒标识88% similarUnverified防晒效果会随洗涤和拉伸衰减：涂层型面罩水洗20-30次后UPF明显下降，追求耐用应选纤维本身致密（非涂层）的原纱型防晒面料87% 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87% similar
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