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Fav十万个为什么
为什么防晒衣标UPF值?
简单的摘要:防晒衣标UPF值的原因主要是衡量紫外线防护能力、符合国际标准以及帮助消费者选择合适的防晒产品。
1、衡量紫外线防护能力:UPF值(紫外线防护系数)表示面料能阻挡多少紫外线辐射,UPF值越高,防护能力越强。例如,UPF 50的面料可阻挡98%的紫外线,显著降低紫外线对皮肤的伤害。
2、符合国际标准:根据国标GB/T 18830《纺织品防紫外线性能的评定》,只有UPF值大于40且UVA透过率小于5%的纺织品才能称为“防紫外线产品”。UPF值的标注是防晒衣符合相关标准的体现。
3、帮助消费者选择:UPF值标注为消费者提供了明确的防晒性能参考,帮助消费者根据自身需求选择合适的防晒衣,从而更好地保护皮肤免受紫外线伤害。
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