izindaba

Ukuvikela ilanga kuyinto okufanele ube nayo kwabesifazane banamuhla unyaka wonke. Ukuvikelwa kwelanga akukwazi nje ukunciphisa umonakalo wemisebe ye-ultraviolet esikhumbeni, kodwa futhi kugweme ukuguga kwesikhumba kanye nezifo zesikhumba ezihlobene. Izithako zokuvikela ilanga ngokuvamile zenziwe ngokomzimba, amakhemikhali, noma ingxube yazo zombili izinhlobo futhi zinikeza ukuvikelwa kwe-UV okubanzi. Ukuze sikusize ukuthi uthenge kangcono i-sunscreen yabo esikhathini esizayo, namuhla thatha wena kusukela kumakhemikhali ezithako ezisebenzayo kanye nezithako ezisebenzayo zomzimba ukuze uhlaziye izithako ezisebenzayo ze-sunscreen.

Isakhi esisebenzayo samakhemikhali

I-Octyl methoxycinnamate

I-Octyl methoxycinnamate (OMC)ingenye yezindlela ezisetshenziswa kakhulu zokuvikela ilanga. I-Octyl methoxycinnamate (OMC) iyisihlungi se-UVB esinejika elihle kakhulu lokumunca i-UV elingu-280~310 nm, izinga lokumunca eliphezulu, ukuphepha okuhle, ubuthi obuncane, kanye nokuncibilika okuhle ezintweni zokusetshenziswa ezinamafutha. Eyaziwa nangokuthi i-octanoate ne-2-ethylhexyl 4-methoxycinnamate. I-compound ivunyelwe njengesithako sezimonyo e-United States kanye ne-European Union (EU) ekugxilweni kuka-7.5-10%.

I-Benzophenone-3

I-Benzophenone-3(i-BP-3) isikrini selanga esincibilikayo esincibilika uwoyela esimunca kokubili i-UVB nemisebe emifushane ye-UVA. I-BP-3 ifakwa i-oxid ngokushesha ngaphansi kwemisebe ye-ultraviolet, inciphisa ukusebenza kwayo futhi ikhiqize inani elikhulu lezinhlobo ze-oxygen esebenzayo. E-United States, isilinganiso esiphezulu esivumelekile se-BP-3 esikrinini selanga singama-6%.

I-Benzophenone -4

I-Benzophenone-4(BP-4) ivamise ukusetshenziswa njengesibambisi se-ultraviolet ekugxiliseni okufika ku-10%. I-BP-4, njenge-BP-3, iwukuphuma kwe-benzophenone.

4-methylbenzyl camphor

I-4-methylbenzylidene camphor (4-methylbenzylidene camphor, 4-MBC) noma i- enzacamene iwukuphuma kwe-organic camphor esetshenziswa njengesimunyisi se-UVB kuma-sunscreen nezinye izimonyo. Nakuba i-compound ingavunyelwe yi-US Food and Drug Administration (FDA), amanye amazwe avumela ukusetshenziswa kwe-compound ekugxilweni okufika ku-4%.

I-4-MBC iyisakhi esine-lipophilic kakhulu esingamuncwa ngesikhumba futhi sikhona ezicutshini zomuntu, kuhlanganise ne-placenta. I-4-MBC inomphumela wokuphazamiseka kwe-estrogen endocrine, okuthinta i-axis yegilo kanye nokuvimbela umsebenzi we-AChE. Ngakho-ke, i-sunscreen equkethe lezi zithako kufanele isetshenziswe ngokuqapha.

3-benzal camphor

I-3-benzylidene camphor (3-BC) iyinhlanganisela ye-lipophilic ehlobene eduze ne-4-MBC. Isilinganiso esiphezulu saso esisetshenziswa emikhiqizweni yokuvikela ilanga e-European Union ngu-2%.

Ngokufanayo ne-4-MBC, i-3-BC nayo ichazwa njenge-ejenti ephazamisa i-estrogen. Ngaphezu kwalokho, i-3-BC kubikwe ukuthi ithinta i-CNS. Futhi, i-sunscreen equkethe lezi zithako kufanele isetshenziswe ngokuqapha.

I-Octylene

I-Octocrtriene (OC) i-ester eyingxenye yeqembu le-cinnamate emunca imisebe ye-UVB ne-UVA, ngokugxila okungafika ku-10% kumakhilimu okuvikela ilanga nezimonyo zansuku zonke.

Ingxenye esebenzayo ebonakalayo

Izithako ezisebenzayo ezisetshenziswa kumakhilimu okuvikela ilanga ngokuvamile i-titanium dioxide (TiO 2) ne-zinc oxide (ZnO), futhi ukugxila kwawo kuvame ukuba ngu-5-10%, ikakhulukazi ngokubonisa noma ukusabalalisa isigameko imisebe ye-ultraviolet (UVR) ukuze kufezwe injongo yokuvikela ilanga. .

I-Titanium dioxide

I-Titanium dioxide iyiminerali emhlophe eyimpuphu eyakhiwe i-titanium nomoya-mpilo. I-Titanium dioxide isetshenziswa kakhulu ekudleni nasezimonyoni, ikakhulukazi ngenxa yobumhlophe bayo kanye nempumelelo yama-sunscreen e-UV.

I-Zinc oxide

I-Zinc oxide iyimpushana emhlophe enezinto zokuvikela nezihlanzayo. Futhi iyisivikelo selanga se-UV esivikela imisebe ye-UVA ne-UVB. Ngaphezu kwalokho, i-zinc ine-anti-inflammatory, astringent and drying properties. I-Zinc oxide, isikhilimu selanga esibonwa njengephephile futhi sisebenza ngempumelelo yi-US Food and Drug Administration, ingenye yazo.

Ngemva kwencazelo yalesi sihloko, ingabe unokuqondisisa kangcono izithako ezisebenzayo ze-sunscreen? Ngicela ungithinte uma uneminye imibuzo.