Taw qhia txog cov ntaub thaiv hnub ci
Nov 20, 2023
Sunscreen npuag yog cov ntaub tshwj xeeb textile uas muaj kev ua haujlwm ntawm kev tiv thaiv ultraviolet hluav taws xob. Nws feem ntau yog siv los ua cov khaub ncaws tiv thaiv hnub ci, kaus mom, parasols thiab lwm yam khoom los tiv thaiv tib neeg los ntawm UV rays.
Cov ntaub thaiv hnub ci feem ntau muaj cov qauv nruj nruj kom thaiv UV rays los ntawm kev nkag mus. Cov fibers no tuaj yeem yog cov fibers ntuj (xws li paj rwb, linen) lossis hluavtaws fibers (xws li polyester, nylon), uas tau raug kho tshwj xeeb thiab ntxiv nrog lub hnub tiv thaiv kev ua haujlwm. Qee cov additives xws li UV absorbers, UV reflectors, thiab UV scatterers.
Thaum xaiv cov ntaub thaiv hnub ci, koj tuaj yeem them sai sai rau lub hnub tiv thaiv ntsuas (SPF) thiab ultraviolet thaiv tus nqi (UPF) ntawm cov khoom. SPF hais txog kev tiv thaiv lub peev xwm ntawm cov khoom siv tshuaj pleev thaiv hnub tiv thaiv ultraviolet B nthwv dej (UVB), thaum UPF hais txog kev tiv thaiv lub peev xwm ntawm lub hnub ci khaub ncaws tiv thaiv ultraviolet A nthwv dej (UVA) thiab ultraviolet B tsis (UVB). Qhov siab dua SPF thiab UPF qhia tau tias muaj kev tiv thaiv tshav ntuj zoo dua.
