nkhani

Kodi ma photoinitiators ndi chiyani ndipo mumadziwa bwanji za ma photoinitiators? Photoinitiators ndi mtundu wa pawiri womwe ungathe kuyamwa mphamvu pamtunda wina wa ultraviolet (250-420nm) kapena kuwonekera (400-800nm) dera, kupanga ma radicals aulere, ma cations, ndi zina zotero, ndipo motero amayambitsa polymerization, crosslinking, ndi kuchiritsa. . Komabe, mafunde omwe amatengedwa ndi ma photoinitiators osiyanasiyana ndi osiyana.

Gulu la ma photoinitiators likhoza kugawidwa makamaka m'magulu awiri: ma free radicals ndi mitundu ya ionic. Ma radicals aulere amatha kugawidwa mu Type I ndi Type II; Mitundu ya Ionic imatha kugawidwa mumitundu ya cationic ndi anionic. Photoinitiator ndiye poyambira pakupanga, ndipo kugwiritsa ntchito kwake komaliza kumakhudzidwa ndi zofunikira za magwiridwe antchito ndi dongosolo lokonzekera. Pali photoinitiator yoyenera kwambiri, palibe chithunzithunzi chabwino kwambiri.

Photoinitiators ali pamwamba pa mtsinje mu unyolo mafakitale. Zida zopangira zida zamakampani opanga ma UV ndi zida zoyambira zamankhwala ndi mankhwala apadera, okhala ndi ma photoinitiators omwe ali kumtunda kwa unyolo wamakampani. Mndandanda wa mankhwala a thiol angagwiritsidwe ntchito ngati zipangizo za photoinitiators, ndipo amagwiritsidwa ntchito makamaka m'minda ya mankhwala ndi mankhwala ophera tizilombo; Ma Photoinitiators amagwiritsidwa ntchito m'magawo osiyanasiyana monga ma photoresists ndi mankhwala othandizira, zokutira za UV, inki za UV, ndi zina zambiri, ndikugwiritsa ntchito zida zamagetsi, zokongoletsera zanyumba ndi zomangira, mankhwala ndi chithandizo chamankhwala, ndi zina zambiri.

Pali mitundu yosiyanasiyana ya ma photoinitiators omwe ali ndi ntchito zosiyanasiyana, ndiye tiyenera kuwasankha bwanji? Kenako, ndikuuzeni momwe mungasankhire zinthu zingapo zomwe anthu ambiri amakumana nazo.

Choyamba, ndikufuna ndikudziwitsenichithunzi 819, yomwe ingagwiritsidwe ntchito popangira zokutira zapulasitiki zamtundu wa UV. Zovala za UV, chifukwa chakuchita bwino komanso kupanga bwino, zakhala zikugwiritsidwa ntchito kwambiri pazipolopolo zapulasitiki zamitundu yosiyanasiyana yamagetsi ndi zida zapakhomo. Komabe, kulimba kwakuya kwa zokutira za UV pambuyo pakupaka utoto sikuli bwino, zomwe zimapangitsa kuti filimuyo isamamatire bwino komanso kubalalitsidwa bwino komanso makonzedwe a inki ndi ma resin a UV, zomwe zimakhudza kwambiri mawonekedwe a zokutira, chifukwa chake, njira yomangamanga ndiyoyamba kugwiritsa ntchito zosungunulira. zoyambira zamitundu zopaka utoto, kenaka gwiritsani ntchito varnish ya UV mukaphika kuti musinthe mawonekedwe amtundu wa filimu ya utoto.

Photoinitiator 184ndi yothandiza komanso yachikasu yolimbana ndi ma free radical (I) mtundu wolimba wokhala ndi zabwino zosungirako nthawi yayitali, kuyambitsa bwino kwambiri, komanso kuyamwa kwakukulu kwa UV. Amagwiritsidwa ntchito makamaka pakuchiritsa kwa UV kwa ma prepolymers opangidwa ndi unsaturated (monga ma acrylic esters) kuphatikiza ma single or multi functional vinyl monomers ndi oligomers, ndipo ndi oyenera kwambiri zokutira ndi inki zomwe zimafunikira digiri yachikasu kwambiri.

Photoinitiator TPO-Lndi mtundu wa photoinitiator wamadzimadzi, womwe umagwiritsidwa ntchito popanga mawonekedwe otsika achikasu komanso fungo lotsika. Amagwiritsidwa ntchito kwambiri mu inki yosindikizira ya silika, inki yosindikizira ya Planographic, inki yosindikizira ya flexographic, photoresist, varnish, mbale yosindikizira ndi zina.

Thechithunzithunzi TPOimagwiritsidwa ntchito kwambiri pamakina oyera, ndipo imatha kugwiritsidwa ntchito popangira zokutira za UV, inki zosindikizira, zomatira zochizira UV, zokutira zamtundu wa Optical, ma photoresists, mbale za photopolymerization, resins stereolithographic, composites, zodzaza mano, ndi zina zambiri.

Photoinitiator 2959 ndi photoinitiator yopanda chikasu yogwira ntchito kwambiri, fungo lochepa, lopanda chikasu, losasunthika, losamva mpweya wa polymerization, komanso kuchiritsa kwakukulu pamwamba. Magulu apadera a hydroxyl omwe amasungunuka mosavuta mu zokutira zotengera madzi. Makamaka oyenera madzi opangidwa ndi acrylic esters ndi unsaturated polyesters. Photoinitiator 2959 ndi zomatira zomwe zimavomerezedwa ndi FDA certification system kuti musagwirizane ndi chakudya mwachindunji.

Benzophenonendi free radical photoinitiator makamaka ntchito ma free radical UV kuchiritsa machitidwe monga zokutira, inki, zomatira, etc. Komanso ndi wapakatikati mu organic pigments, mankhwala, zonunkhira, ndi tizilombo. Chogulitsachi ndi styrene polymerization inhibitor ndi fungo lokhazika mtima pansi, lomwe limatha kupatsa fungo lokoma, ndipo limagwiritsidwa ntchito kwambiri mumafuta onunkhira ndi sopo.

Zinthu zofanana ndi ma photoinitiators ndi ultraviolet absorbers. Nthawi zina, nthawi zambiri anthu sangathe kusiyanitsa pakati pa ziwirizi.UV absorbersakhoza m'malo photoinitiators. Chifukwa ma UV absorbers ndi omwe amagwiritsidwa ntchito kwambiri pamtundu wokhazikika wa kuwala ndipo amatha kukhala ogwirizana kapena kusintha ma photoinitiators kuti agwiritsidwe ntchito, komanso kugwira ntchito kwawo kulinso kwabwino kwambiri. Ma Photoinitiators amagwiritsidwa ntchito makamaka pojambula zithunzi, inki, zokutira, komanso angagwiritsidwe ntchito m'mafakitale ndi zamagetsi. Zodzikongoletsera za UV zimakhala ndi ntchito zambiri, zomwe zimagwiritsidwa ntchito makamaka mu zodzoladzola zomwe zimakhala ndi zofunika kwambiri. Panthawiyi, mtengo wa ultraviolet absorbers ndi wokwera kwambiri, pamene photoinitiators ndi otsika. Mutha kusankha zofananira potengera zosowa zanu.

Ndife akatswiri opanga oyambitsa. Kuphatikiza pa zomwe tazitchula pamwambapa, tilinso ndi zinthu zotsatirazi: