xov xwm

Kev tiv thaiv tshav ntuj yog qhov yuav tsum muaj rau cov poj niam niaj hnub no thoob plaws hauv lub xyoo. Kev tiv thaiv tshav ntuj tuaj yeem tsis tsuas yog txo qhov kev puas tsuaj ntawm ultraviolet rays ntawm daim tawv nqaij, tab sis kuj zam cov tawv nqaij laus thiab lwm yam kab mob ntawm daim tawv nqaij. Cov khoom xyaw tshuaj pleev thaiv hnub feem ntau yog tsim los ntawm lub cev, tshuaj, lossis sib xyaw ntawm ob hom thiab muab kev tiv thaiv UV dav dav. Txhawm rau pab koj kom zoo dua yuav lawv cov tshuaj pleev thaiv hnub yav tom ntej, hnub no coj koj los ntawm cov khoom xyaw tshuaj lom neeg thiab cov khoom siv lub cev los tshuaj xyuas cov khoom xyaw zoo ntawm cov tshuaj pleev thaiv hnub.

Tshuaj active tivthaiv

Octyl methoxycinnamate hmoov

Tom ntej: Octyl methoxycinnamate (OMC)yog ib qho ntawm cov tshuaj pleev thaiv hnub uas siv ntau tshaj plaws. Octyl methoxycinnamate (OMC) yog UVB lim nrog zoo heev UV absorption nkhaus ntawm 280 ~ 310 nm, siab nqus tus nqi, zoo kev nyab xeeb, tsawg toxicity, thiab zoo solubility rau oily raw khoom. Kuj hu ua octanoate thiab 2-ethylhexyl 4-methoxycinnamate. Cov khoom sib xyaw tau pom zoo ua cov khoom siv tshuaj pleev ib ce hauv Tebchaws Meskas thiab European Union (EU) ntawm qhov ntau ntawm 7.5-10%.

Benzophenone-3

Benzophenone-3(BP-3) yog cov roj-soluble broad-band organic tshuaj pleev thaiv hnub uas absorbs UVB thiab luv UVA rays. BP-3 yog oxidized sai heev nyob rau hauv cov hluav taws xob ultraviolet, txo nws cov kev ua tau zoo thiab ua kom muaj ntau cov pa oxygen reactive. Hauv Tebchaws Meskas, qhov siab tshaj plaws tso cai ntawm BP-3 hauv tshuaj pleev thaiv hnub yog 6%.

Benzophenone -4

Benzophenone-4(BP-4) feem ntau yog siv los ua ultraviolet absorber ntawm qhov siab txog li 10%. BP-4, zoo li BP-3, yog benzophenone derivative.

4-methylbenzyl camphor

4-methylbenzylidene camphor (4-methylbenzylidene camphor, 4-MBC) los yog enzacamene yog cov organic camphor derivative siv los ua UVB absorber hauv cov tshuaj pleev thaiv hnub thiab lwm yam tshuaj pleev ib ce. Txawm hais tias qhov sib xyaw tsis raug pom zoo los ntawm US Food and Drug Administration (FDA), lwm lub teb chaws tso cai rau kev siv cov khoom sib xyaw ua ke hauv ntau txog 4%.

4-MBC yog ib qho zoo lipophilic tivthaiv uas tuaj yeem nqus tau los ntawm daim tawv nqaij thiab muaj nyob hauv tib neeg cov ntaub so ntswg, suav nrog cov placenta. 4-MBC muaj cov nyhuv ntawm cov tshuaj estrogen endocrine cuam tshuam, cuam tshuam rau cov thyroid axis thiab inhibiting kev ua ntawm AChE. Cov tshuaj pleev thaiv hnub uas muaj cov khoom xyaw no yuav tsum tau siv nrog ceev faj.

3- benzal camphor

3-benzylidene camphor (3-BC) yog lipophilic compound zoo sib xws nrog 4-MBC. Qhov siab tshaj plaws ntawm nws siv hauv cov khoom siv tshuaj pleev thaiv hnub nyob hauv European Union yog 2%.

Zoo ib yam li 4-MBC, 3-BC kuj tau piav qhia tias yog cov tshuaj estrogen cuam tshuam. Tsis tas li ntawd, 3-BC tau tshaj tawm tias cuam tshuam rau CNS. Ntxiv dua thiab, tshuaj pleev thaiv hnub uas muaj cov khoom xyaw no yuav tsum tau siv nrog ceev faj.

Octylene

Octocrtriene (OC) yog ib qho ester uas koom nrog pawg cinnamate uas nqus UVB thiab UVA rays, nrog rau ntau txog 10% hauv cov tshuaj pleev thaiv hnub thiab tshuaj pleev ib ce txhua hnub.

Lub cev active tivthaiv

Cov khoom xyaw siv lub cev siv hauv cov tshuaj pleev thaiv hnub feem ntau yog titanium dioxide (TiO 2) thiab zinc oxide (ZnO), thiab lawv cov concentrations feem ntau yog 5-10%, feem ntau yog los ntawm kev xav lossis tawg qhov xwm txheej ultraviolet radiation (UVR) kom ua tiav lub hom phiaj ntawm cov tshuaj pleev thaiv hnub. .

Titanium dioxide

Titanium dioxide yog cov hmoov nplej dawb uas muaj titanium thiab oxygen. Titanium dioxide yog siv dav hauv cov khoom noj thiab tshuaj pleev ib ce, tshwj xeeb tshaj yog vim nws cov xim dawb thiab ua tau zoo ntawm UV tshuaj pleev thaiv hnub.

Zinc oxide

Zinc oxide yog hmoov dawb nrog kev tiv thaiv thiab ua kom huv. Nws kuj yog ib qho tshuaj tiv thaiv UV tiv thaiv uas cuam tshuam txog UVA thiab UVB rays. Tsis tas li ntawd, zinc muaj anti-inflammatory, astringent thiab ziab. Zinc oxide, tshuaj pleev thaiv hnub pom zoo tias muaj kev nyab xeeb thiab siv tau los ntawm US Food and Drug Administration, yog ib qho ntawm lawv.

Tom qab cov lus piav qhia ntawm tsab xov xwm no, koj puas muaj kev nkag siab zoo dua ntawm cov khoom xyaw nquag ntawm cov tshuaj pleev thaiv hnub? Thov hu rau kuv yog tias koj muaj lus nug.