izindaba

I-Ultraviolet absorber (i-UV absorber) iyi-light stabilizer engakwazi ukumunca ingxenye ye-ultraviolet yelanga kanye nemithombo yokukhanya ekhanyayo ngaphandle kokushintsha yona. I-Ultraviolet absorber ikakhulukazi iyimpuphu emhlophe ekristalu, ukuzinza okuhle kokushisa, ukuzinza okuhle kwamakhemikhali, okungenambala, okungenabuthi, okungenaphunga, okusetshenziswa kakhulu kuma-polymer (amapulasitiki, njll.), ukumbozwa njalo njalo.

Iningi lezinto ezifaka imibala, ikakhulukazi izinto ezifaka imibala ezingaphili, zingadlala izinga elithile lokuzinza kokukhanya uma zisetshenziswa zodwa emikhiqizweni yepulasitiki. Emikhiqizweni yepulasitiki enemibala yokusetshenziswa ngaphandle isikhathi eside, ukuzinza kokukhanya komkhiqizo akunakuthuthukiswa yizinto ezifaka umbala zodwa. Ukusetshenziswa kwe-light stabilizer kuphela okungavimbela noma kwehlise izinga lokuguga kokukhanya kwemikhiqizo yepulasitiki enemibala isikhathi eside. Kuthuthukisa kakhulu ukuzinza kokukhanya kwemikhiqizo yepulasitiki enemibala. I-Hindered amine light stabilizer (HALS) iyiklasi lama-organic amine compounds anomphumela wokuvimbela we-steric. Ngenxa yemisebenzi yayo yokubola i-hydroperoxide, ukucima i-radical oxygen, ukubamba ama-free radicals, kanye nokuphinda kusetshenziswe amaqembu asebenzayo, i-HALS iyi-plastic light stabilizer enekhono eliphezulu lokulwa nokuthwebula izithombe kanye nenani elikhulu kakhulu ekhaya nakwamanye amazwe. Idatha ikhombisa ukuthi i-light stabilizer efanele noma uhlelo olufanele lokuhlanganiswa kwe-antioxidant kanye ne-light stabilizer lungathuthukisa ukuzinza kokukhanya kanye ne-oxygen kwemikhiqizo yepulasitiki enemibala yangaphandle izikhathi eziningana. Emikhiqizweni yepulasitiki efakwe umbala ngezinto ezishintsha umbala kanye nezinto ezithinta ukukhanya (njenge-cadmium yellow, i-rutile engafakwanga umsila, njll.), uma kucatshangelwa umphumela we-catalytic photoaging wezinto ezishintsha umbala, inani le-light stabilizer kufanele landiswe ngokufanele.

Izifutho ze-UV ngokuvamile zingahlukaniswa ngokwesakhiwo samakhemikhali, ingxenye yesenzo kanye nokusetshenziswa, okuchazwe ngezansi:

1. Ukuhlukaniswa ngokwesakhiwo samakhemikhali: izifutho ze-ultraviolet zingahlukaniswa zibe izifutho ze-ultraviolet eziphilayo kanye nezifutho ze-ultraviolet ezingaphili. Izifutho ze-ultraviolet eziphilayo zifaka phakathi ama-benzoates, ama-benzotriazole, ama-cyanoacrylate, njll., kanti izifutho ze-ultraviolet ezingaphili zifaka phakathi i-zinc oxide, i-iron oxide, i-titanium dioxide njalo njalo.

2. Ukuhlukaniswa ngokwendlela yokusebenza: i-ultraviolet absorber ingahlukaniswa ngohlobo lokuvikela kanye nohlobo lokumunca. Ama-UV absorber avikelayo ayakwazi ukubonakalisa ukukhanya kwe-UV ngaleyo ndlela akuvimbele ukungena emzimbeni, kuyilapho ama-UV amukelayo ekwazi ukudonsa ukukhanya kwe-UV futhi akuguqule kube ukushisa noma ukukhanya okubonakalayo.

3. Ukuhlukaniswa ngokwendlela okusetshenziswa ngayo: isifutho se-ultraviolet singahlukaniswa sibe yizinga lezimonyo, izinga lokudla, izinga lemithi, njll. Izifutho ze-UV zezinga lezimonyo zisetshenziswa kakhulu ekuvikeleni ilanga, imikhiqizo yokunakekela isikhumba nezinye izimonyo, izifutho ze-UV zezinga lokudla zisetshenziswa kakhulu ezintweni zokupakisha ukudla, kanti izifutho ze-UV zezinga lemithi zisetshenziswa kakhulu ezidakamizweni.

I-Unilong Industry inguchwephesheUmkhiqizi we-UV, singakunikeza okulandelayoUchungechunge lwe-UVyemikhiqizo, uma uyidinga, sicela ukhululeke ukuxhumana nathi