Unverified75% confidenceFactTime unknown
防晒手套的UPF会随反复洗涤和拉伸下降，化学助剂型（后整理喷涂）洗几十次后防晒明显衰减，纤维本身致密织造的更耐久
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75%
Confidence
Long-term
Relevance
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Unverified防晒头套的UPF会随洗涤和拉伸衰减，含物理防晒（二氧化钛处理）的耐久性优于化学涂层款，涂层款洗涤20-30次后防晒明显下降需更换88% similarUnverified防晒手套的UPF值来自纤维密织结构和抗UV涂层两种机制，涂层型经20-30次洗涤后防护性衰减明显，长期高频使用应选原纱抗UV（纤维本身含UV吸收剂）而非后整理涂层款87% similarUnverified防晒面料的UPF防护效果在多次洗涤和长期拉伸后会衰减，锦纶+氨纶复合面料比纯棉印染防晒更耐洗持久，纯棉染色防晒洗几次就大幅下降87% similarUnverified遮阳篷的UPF防护会随水洗次数和布料老化下降，涂层类防晒布洗涤20-30次后防护力明显衰减，而纤维本身高密度织造的面料防晒更耐久87% similarUnverified防晒披肩的UPF值会随反复洗涤和拉伸下降，尤其涂层型防晒面料衰减明显；优先选防晒力来自纤维本身织造密度的产品，可水洗多次仍保持性能87% similar
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