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Kudzivirirwa kwezuva kunofanirwa kuve kune vakadzi vemazuva ano gore rose. Kudzivirirwa kwezuva hakugone chete kuderedza kukuvadzwa kwemirairo ye ultraviolet paganda, asiwo kudzivirira kukwegura kweganda uye zvirwere zveganda zvinoenderana. Zvigadzirwa zvezuva rezuva zvinowanzogadzirwa zvemuviri, makemikari, kana musanganiswa wemhando mbiri uye zvinopa yakakura spectrum UV dziviriro. Kuti zvikubatsire kuti utenge zvirinani ivo vega sunscreen mune ramangwana, nhasi tora iwe kubva kune kemikari inoshanda zvimisikidzo uye yemuviri inoshanda zvimisikidzo kuti uongorore zvinoshanda zvezuva.

Kemikari inoshanda chikamu

Octyl methoxycinnamate

Octyl methoxycinnamate (OMC)chimwe chezvinonyanya kushandiswa zvezuva. Octyl methoxycinnamate (OMC) iri UVB sefa ine yakanakisa UV absorption curve ye280 ~ 310 nm, yakanyanya kunyura mwero, kuchengetedzeka kwakanaka, huturu hushoma, uye kunaka kunyungudika kune mafuta mbishi zvinhu. Iyo inozivikanwawo se octanoate uye 2-ethylhexyl 4-methoxycinnamate. Mushonga uyu wakabvumidzwa sechinhu chekushongedza muUnited States neEuropean Union (EU) pachikamu che7.5-10%.

Benzophenone-3

Benzophenone-3(BP-3) ioiri-inonyungudika yakafara-bhendi organic sunscreen inobata zvese UVB uye pfupi UVA mwaranzi. BP-3 inokurumidza oxidized pasi pemwaranzi yeultraviolet, ichideredza kushanda kwayo uye kuburitsa huwandu hwakawanda hwemhando dzeokisijeni dzinoshanda. MuUnited States, huwandu hunobvumirwa hweBP-3 mune sunscreen ndeye 6%.

Benzophenone -4

Benzophenone-4(BP-4) inowanzoshandiswa se ultraviolet absorber pamisumbu kusvika ku10%. BP-4, kufanana neBP-3, inotorwa benzophenone.

4-methylbenzyl camphor

4-methylbenzylidene camphor (4-methylbenzylidene camphor, 4-MBC) kana enzacamene ndeye organic camphor inotorwa inoshandiswa se UVB inonyudza mune sunscreens nezvimwe zvekuzora. Kunyangwe komboni yacho isingatenderwe neUS Food and Drug Administration (FDA), dzimwe nyika dzinobvumidza kushandiswa kwekomboni muzvikamu zvinosvika 4%.

4-MBC inhengo ine lipophilic yakanyanya inogona kutorwa neganda uye inowanikwa munyama yemunhu, kusanganisira iyo placenta. 4-MBC ine mhedzisiro yeesrogen endocrine kukanganisa, inokanganisa thyroid axis uye inhibiting basa reAChE. Saka sunscreen ine zvinhu izvi zvinofanira kushandiswa nekuchenjerera.

3-benzal camphor

3-benzylidene camphor (3-BC) inhengo ye lipophilic yakabatana ne 4-MBC. Iyo yakanyanya kuunganidzwa kwayo inoshandiswa muzvigadzirwa zvezuva muEuropean Union i2%.

Zvakafanana ne4-MBC, 3-BC inotsanangurwawo seestrogen-inovhiringidza mumiriri. Mukuwedzera, 3-BC inonzi inokanganisa CNS. Zvakare, sunscreen ine zvinhu izvi zvinofanira kushandiswa nekuchenjerera.

Octylene

Octocrtriene (OC) is ester yeboka recinnamate rinotora UVB neUVA mwaranzi, nekudzika kusvika gumi muzana mune sunscreens uye zuva nezuva zvizoro.

Muviri unoshanda chikamu

Mishonga yemuviri inoshandiswa mumafuta ezuva anowanzo titanium dioxide (TiO 2) uye zinc oxide (ZnO), uye kunyanya kwavo kunowanzova 5-10%, kunyanya nekuratidza kana kuparadzira chiitiko ultraviolet radiation (UVR) kuti uwane chinangwa chezuva. .

Titanium dioxide

Titanium dioxide iminerari yakachena ye powdery inoumbwa netitanium uye oksijeni. Titanium dioxide inoshandiswa zvakanyanya mukudya nekuzora, kunyanya nekuda kwekuchena kwayo uye kushanda kwe UV sunscreens.

Zinc oxide

Zinc oxide ipfu chena ine inodzivirira uye inonatsa zvinhu. Iyo zvakare inodzivirira UV sunscreen inoratidzira ese UVA uye UVB maranzi. Mukuwedzera, zinc ine anti-inflammatory, astringent uye kuomesa zvinhu. Zinc oxide, sunscreen inozivikanwa seyakachengeteka uye inoshanda neUS Food and Drug Administration, ndeimwe yayo.

Mushure mekutsanangurwa kwechinyorwa chino, une nzwisiso iri nani yezvishandiso zvinoshandiswa zvekudzivirira zuva? Ndapota ndibatei kana mune mimwe mibvunzo.