防紫外線衣服布料哪種好
太(tai)陽光(guang)(guang)包括了可見光(guang)(guang)、紫外(wai)(wai)線(xian)(UV)、紅外(wai)(wai)線(xian)等不(bu)同波段的光(guang)(guang),其(qi)中100-400納米波長(chang)的光(guang)(guang)就(jiu)是(shi)紫外(wai)(wai)線(xian)了。紫外(wai)(wai)線(xian)光(guang)(guang)譜(pu)分UVA,UVB,UVC三個波段,其(qi)中UVA和UVB對(dui)人(ren)體傷(shang)害最大(da),簡單的說,就(jiu)是(shi)UVA把你曬黑,并引(yin)起大(da)量(liang)黑色素沉淀(dian)在表皮(pi)(pi)層。UVB可穿透表皮(pi)(pi),長(chang)期(qi)照射會(hui)引(yin)起遺傳因(yin)子DNA損壞,導致皮(pi)(pi)膚癌,它占了太(tai)陽光(guang)(guang)線(xian)的6.1%。
滌(di)綸面(mian)(mian)(mian)料(liao)(liao)的(de)衣服防(fang)(fang)紫(zi)(zi)(zi)外(wai)線(xian)(xian)效果最好,這與滌(di)綸纖維(wei)分子結構(gou)中苯環具有(you)吸(xi)收紫(zi)(zi)(zi)外(wai)線(xian)(xian)的(de)作用有(you)關,棉、絲、尼龍、粘膠等面(mian)(mian)(mian)料(liao)(liao)的(de)衣服防(fang)(fang)紫(zi)(zi)(zi)外(wai)線(xian)(xian)性(xing)(xing)能(neng)較差。滌(di)綸面(mian)(mian)(mian)料(liao)(liao)對紫(zi)(zi)(zi)外(wai)線(xian)(xian)有(you)良好的(de)吸(xi)收和反射作用,屏蔽性(xing)(xing)強(qiang),紫(zi)(zi)(zi)外(wai)線(xian)(xian)透過率小(xiao)于3%,洗滌(di)多(duo)次(ci)后防(fang)(fang)紫(zi)(zi)(zi)外(wai)線(xian)(xian)率仍達(da)85%以上。此外(wai),顏(yan)色(se)越(yue)(yue)(yue)深(shen)的(de)織物抗紫(zi)(zi)(zi)外(wai)線(xian)(xian)的(de)性(xing)(xing)能(neng)越(yue)(yue)(yue)好,黑色(se)、藏青色(se)、深(shen)綠色(se)就較淺(qian)藍色(se)、淺(qian)粉色(se)、淺(qian)黃色(se)等防(fang)(fang)紫(zi)(zi)(zi)外(wai)線(xian)(xian)性(xing)(xing)能(neng)好。布料(liao)(liao)織物顏(yan)色(se)越(yue)(yue)(yue)深(shen),紫(zi)(zi)(zi)外(wai)線(xian)(xian)透過率越(yue)(yue)(yue)小(xiao)。衣服面(mian)(mian)(mian)料(liao)(liao)越(yue)(yue)(yue)緊密,擋光能(neng)力就越(yue)(yue)(yue)強(qiang),紫(zi)(zi)(zi)外(wai)線(xian)(xian)透過量就越(yue)(yue)(yue)少(shao)。機織面(mian)(mian)(mian)料(liao)(liao)防(fang)(fang)紫(zi)(zi)(zi)外(wai)線(xian)(xian)性(xing)(xing)能(neng)好于針織面(mian)(mian)(mian)料(liao)(liao)。
防曬衣的工作原理
防曬衣的(de)原理就是利用(yong)混入(ru)面(mian)料(liao)中的(de)紫(zi)外(wai)(wai)線吸收劑(ji),吸收高能量的(de)紫(zi)外(wai)(wai)線,使之(zhi)向低(di)能量轉化,變成低(di)能量的(de)熱能或(huo)波(bo)長(chang)較短的(de)電(dian)磁波(bo),從(cong)而消(xiao)除紫(zi)外(wai)(wai)線對人體和(he)(he)織(zhi)物的(de)危害(hai)。它(ta)還(huan)利用(yong)紫(zi)外(wai)(wai)線反射劑(ji),增加織(zhi)物對紫(zi)外(wai)(wai)線的(de)反射和(he)(he)散射作用(yong),防止透過織(zhi)物。具有防暑、隔熱、觸(chu)感涼(liang)爽的(de)性(xing)能。
需(xu)要說明的(de)(de)是(shi)國(guo)家標準規定UPF<30+、UVA透(tou)過(guo)率>5%的(de)(de)面(mian)料(liao)是(shi)不(bu)(bu)能(neng)夠(gou)稱為防(fang)(fang)曬衣產(chan)品的(de)(de)。防(fang)(fang)曬衣服(fu)裝面(mian)料(liao)包括棉、麻、絲(si)、毛、化纖等織(zhi)物,一些經過(guo)較好工藝整(zheng)(zheng)理的(de)(de)防(fang)(fang)紫外(wai)線(xian)面(mian)料(liao)對(dui)處于180-400nm波段的(de)(de)紫外(wai)線(xian)有(you)(you)著良好的(de)(de)吸(xi)收轉化、反(fan)射和(he)散射作(zuo)用,經整(zheng)(zheng)理后的(de)(de)面(mian)料(liao)無毒性(xing)、對(dui)皮(pi)膚無刺激(ji),人(ren)體不(bu)(bu)會(hui)產(chan)生無過(guo)敏反(fan)應,同時(shi)也不(bu)(bu)影(ying)響面(mian)料(liao)的(de)(de)著色度(du)和(he)吸(xi)濕透(tou)汽性(xing)能(neng)。好的(de)(de)防(fang)(fang)紫外(wai)線(xian)面(mian)料(liao)對(dui)100-400cm波段的(de)(de)紫外(wai)線(xian),特別(bie)是(shi)UV-A和(he)UV-B有(you)(you)良好的(de)(de)吸(xi)收作(zuo)用,洗滌(di)50次后紫外(wai)線(xian)透(tou)過(guo)率仍低于1%,紫外(wai)線(xian)遮擋系數UPF還能(neng)夠(gou)達(da)到50+的(de)(de)最高(gao)級別(bie)。
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