nkhani

Chitetezo cha dzuwa ndichofunika kwa amayi amakono chaka chonse. Kuteteza dzuwa sikungangochepetsa kuwonongeka kwa kuwala kwa ultraviolet pakhungu, komanso kupewa ukalamba wa khungu ndi matenda okhudzana ndi khungu. Zopangira zodzitetezera ku dzuwa nthawi zambiri zimakhala ndi thupi, mankhwala, kapena zosakaniza zamitundu yonse ndipo zimapereka chitetezo cha UV. Pofuna kukuthandizani kuti mugule zodzitetezera ku dzuwa m'tsogolomu, lero ndikutengereni ku mankhwala opangira mankhwala ndi zosakaniza zolimbitsa thupi kuti mufufuze zosakaniza zothandiza za sunscreen.

Mankhwala yogwira chigawo chimodzi

Octyl methoxycinnamate

Octyl methoxycinnamate (OMC)ndi imodzi mwa mankhwala omwe amagwiritsidwa ntchito kwambiri ndi dzuwa. Octyl methoxycinnamate (OMC) ndi fyuluta ya UVB yokhala ndi mayamwidwe abwino kwambiri a UV a 280 ~ 310 nm, mayamwidwe apamwamba, chitetezo chabwino, kawopsedwe kakang'ono, komanso kusungunuka kwabwino kuzinthu zamafuta. Imadziwikanso kuti octanoate ndi 2-ethylhexyl 4-methoxycinnamate. Pulogalamuyi yavomerezedwa ngati zodzikongoletsera ku United States ndi European Union (EU) pazambiri za 7.5-10%.

Benzophenone-3

Benzophenone-3(BP-3) ndi mafuta osungunula a sunscreen omwe amayamwa UVB ndi cheza chachifupi cha UVA. BP-3 imapangidwa ndi okosijeni mwachangu pansi pa cheza cha ultraviolet, kuchepetsa mphamvu yake ndikutulutsa mitundu yambiri ya okosijeni wokhazikika. Ku United States, kuchuluka kovomerezeka kwa BP-3 pa sunscreen ndi 6%.

Benzophenone - 4

Benzophenone-4(BP-4) imagwiritsidwa ntchito ngati chotsitsa cha ultraviolet pamiyeso mpaka 10%. BP-4, monga BP-3, ndi yochokera ku benzophenone.

4-methylbenzyl camphor

4-methylbenzylidene camphor (4-methylbenzylidene camphor, 4-MBC) kapena enzacamene ndi organic camphor yotengedwa ngati UVB absorber mu sunscreens ndi zodzoladzola zina. Ngakhale kuti gululi silinavomerezedwe ndi US Food and Drug Administration (FDA), mayiko ena amalola kugwiritsa ntchito mankhwalawa mpaka 4%.

4-MBC ndi gawo lamphamvu kwambiri la lipophilic lomwe limatha kuyamwa kudzera pakhungu ndipo limapezeka m'matupi amunthu, kuphatikiza nkhokwe. 4-MBC ili ndi zotsatira za kusokonezeka kwa estrogen endocrine, kumakhudza mbali ya chithokomiro komanso kulepheretsa ntchito ya AChE. Choncho, mafuta oteteza ku dzuwa okhala ndi zinthu izi ayenera kugwiritsidwa ntchito mosamala.

3-benzal camphor

3-benzylidene camphor (3-BC) ndi lipophilic compound yogwirizana kwambiri ndi 4-MBC. Kuchuluka kwake komwe kumagwiritsidwa ntchito popanga zoteteza dzuwa ku European Union ndi 2%.

Mofanana ndi 4-MBC, 3-BC imafotokozedwanso ngati wothandizira estrogen-kusokoneza. Kuphatikiza apo, 3-BC yanenedwa kuti ikukhudza CNS. Apanso, mafuta oteteza dzuwa okhala ndi zinthu izi ayenera kugwiritsidwa ntchito mosamala.

Octylene

Octocrtriene (OC) ndi ester ya gulu la cinnamate lomwe limayatsa kuwala kwa UVB ndi UVA, ndikuyika mpaka 10% muzopaka zopaka dzuwa ndi zodzoladzola za tsiku ndi tsiku.

Thupi yogwira gawo

Zomwe zimagwiritsidwa ntchito popanga mafuta oteteza dzuwa nthawi zambiri zimakhala titanium dioxide (TiO 2) ndi zinc oxide (ZnO), ndipo nthawi zambiri zimakhala 5-10%, makamaka powonetsa kapena kufalitsa zochitika za ultraviolet radiation (UVR) kuti akwaniritse cholinga cha sunscreen. .

Titaniyamu dioxide

Titanium dioxide ndi mchere woyera wa powdery wopangidwa ndi titaniyamu ndi mpweya. Titanium dioxide imagwiritsidwa ntchito kwambiri m'zakudya ndi zodzoladzola, makamaka chifukwa cha kuyera kwake komanso mphamvu yamagetsi oteteza dzuwa ku UV.

Zinc oxide

Zinc oxide ndi ufa woyera wokhala ndi zoteteza komanso zoyeretsa. Komanso ndi chitetezo cha dzuwa cha UV chomwe chimawonetsa kuwala kwa UVA ndi UVB. Kuphatikiza apo, zinc imakhala ndi anti-yotupa, astringent ndi kuyanika. Zinc oxide, mafuta oteteza dzuwa omwe amadziwika kuti ndi otetezeka komanso othandiza ndi US Food and Drug Administration, ndi amodzi mwa iwo.

Pambuyo pa kufotokoza kwa nkhaniyi, kodi mukumvetsa bwino zinthu zomwe zimagwiritsidwa ntchito poteteza dzuwa? Chonde nditumizireni ngati muli ndi mafunso ena.