iindaba

Ukukhuselwa kwelanga yinto efunekayo kubafazi banamhlanje unyaka wonke. Ukukhuselwa kwelanga akukwazi ukunciphisa kuphela umonakalo wemitha ye-ultraviolet esikhumbeni, kodwa kunqande ukuguga kwesikhumba kunye nezifo zesikhumba ezinxulumene nazo. Izithako ze-sunscreen zihlala zenziwe ngokwasemzimbeni, iikhemikhali, okanye umxube wazo zombini iindidi kwaye zibonelela ngokhuseleko olubanzi lwe-UV. Ukukunceda ukuba uthenge ngcono i-sunscreen yabo kwixesha elizayo, namhlanje kukuthatha kwiikhemikhali ezisebenzayo kunye nezithako ezisebenzayo zomzimba ukuhlalutya izithako ezisebenzayo ze-sunscreen.

Ikhemikhali esebenzayo icandelo

I-Octyl methoxycinnamate

I-Octyl methoxycinnamate (OMC)yenye yezona zinto ziqhelekileyo zisetyenziswa kwi-sunscreen agents. I-Octyl methoxycinnamate (OMC) sisihluzo se-UVB esinegophe eligqwesileyo le-UV lokufunxa le-280 ~ 310 nm, izinga lokufunxa eliphezulu, ukhuseleko olulungileyo, ubutyhefu obuncinci, kunye nokunyibilika okulungileyo kwizinto ezikrwada ezinamafutha. Ikwaziwa njenge-octanoate kunye ne-2-ethylhexyl 4-methoxycinnamate. Ikhompawundi ivunyiwe njengesithako sokuthambisa e-United States kunye ne-European Union (EU) ekugxininiseni kwe-7.5-10%.

Benzophenone-3

Benzophenone-3(BP-3) sisikhuseli solanga selanga esinyibilikayo esinyibilikayo kwi-oyile esifunxa zombini ii-UVB kunye nemitha emifutshane ye-UVA. I-BP-3 i-oxidized ngokukhawuleza phantsi kwemitha ye-ultraviolet, ukunciphisa ukusebenza kwayo kunye nokuvelisa inani elikhulu leentlobo ze-oksijini ezisebenzayo. EUnited States, ubuninzi obuvumelekileyo be-BP-3 kwi-sunscreen yi-6%.

Benzophenone -4

Benzophenone-4(BP-4) isetyenziswa ngokuqhelekileyo njenge-absorbent ultraviolet ekugxininiseni ukuya kwi-10%. I-BP-4, njenge-BP-3, i-derivative ye-benzophenone.

I-4-methylbenzyl camphor

I-4-methylbenzylidene camphor (4-methylbenzylidene camphor, 4-MBC) okanye enzacamene yi-organic camphor derivative esetyenziswa njenge-Absorbent ye-UVB kwi-sunscreens kunye nezinye izithambiso. Nangona i-compound ingavunywanga yi-US Food and Drug Administration (FDA), amanye amazwe avumela ukusetyenziswa kwekhompawundi ekugxininiseni ukuya kwi-4%.

I-4-MBC iyinxalenye ye-lipophilic ephezulu enokuthi ifakwe ngesikhumba kwaye ikhona kwizicubu zomntu, kubandakanywa ne-placenta. I-4-MBC inefuthe lokuphazamiseka kwe-estrogen endocrine, echaphazela i-thyroid axis kunye nokuvimbela umsebenzi we-AChE. I-sunscreen equlethe ezi zithako kufuneka ke isetyenziswe ngononophelo.

3-benzal camphor

I-3-benzylidene camphor (3-BC) i-lipophilic compound ngokusondeleyo kwi-4-MBC. Ubuninzi boxinzelelo olusetyenziswa kwiimveliso zelanga kwi-European Union yi-2%.

Ngokufana ne-4-MBC, i-3-BC ikwachazwa njenge-agent ephazamisayo ye-estrogen. Ukongezelela, i-3-BC iye yaxelwa ukuba ichaphazele i-CNS. Kwakhona, i-sunscreen equlethe ezi zithako kufuneka isetyenziswe ngononophelo.

Octylene

I-Octocrtriene (OC) yi-ester yeqela le-cinnamate efunxa imitha ye-UVB kunye ne-UVA, kunye nokugxila ukuya kwi-10% kwi-sunscreens kunye nezithambiso zemihla ngemihla.

Ilungu elibonakalayo elisebenzayo

Izithako ezisebenzayo zomzimba ezisetyenziswa kwi-sunscreens zidla ngokuba yi-titanium dioxide (TiO 2) kunye ne-zinc oxide (ZnO), kwaye ugxininiso lwazo luhlala luyi-5-10%, ngokukodwa ngokubonakalisa okanye ukusabalalisa isiganeko semisebe ye-ultraviolet (UVR) ukufezekisa injongo ye-sunscreen. .

I-Titanium dioxide

I-Titanium dioxide yiminerali emhlophe engumgubo eyenziwe yi-titanium kunye neoksijini. I-Titanium dioxide isetyenziswa kakhulu ekutyeni nakwizithambiso, ngakumbi ngenxa yobumhlophe bayo kunye nokusebenza kakuhle kwe-sunscreens ye-UV.

I-zinc oxide

I-Zinc oxide iyimpuphu emhlophe enezixhobo ezikhuselayo kunye nokucoca. Ikwasisikhuseli selanga se-UV esikhuselayo esibonisa zombini imitha ye-UVA kunye ne-UVB. Ukongezelela, i-zinc ine-anti-inflammatory, astringent and drying properties. I-Zinc oxide, i-sunscreen eyaziwa njengekhuselekile kwaye isebenzayo yi-US Food and Drug Administration, yenye yazo.

Emva kwenkcazo yeli nqaku, ngaba unokuqonda kangcono izithako ezisebenzayo ze-sunscreen? Nceda uqhagamshelane nam ukuba unayo nayiphi na eminye imibuzo.