Te whakaurunga o te mimiti UV

He nui te hihi ultraviolet kei roto i te hihi o te rā, he kino ki ngā mea tae. Ko tōna roangaru he tata ki te 290~460nm. Mā ēnei hihi ultraviolet kino ka pirau, ka memeha hoki ngā ngota tae i roto i ngā tauhohenga matū o te waikura-whakaiti. Mā te whakamahi i ngā mea mimiti ultraviolet ka taea te ārai, te whakaiti rānei i te kino o ngā hihi ultraviolet ki ngā mea e tiakina ana.

He mea whakaū mārama te ngongo UV e taea ai te mimiti i te wāhanga ultraviolet o te rā me ngā pūtake mārama fluorescent me te kore e whakarerekē i a ia anō. Ka puta he tauhohenga waikura-aunoa i raro i te rā me te fluorescence nā te mahi a ngā hihi ultraviolet, ka hua ake he tauhohenga waikura-ā-roto i raro i te rā me te fluorescence nā te mahi a ngā hihi ultraviolet, ka arahi ki te pirau me te hekenga o ngā polymers, me te hekenga o te āhua me ngā āhuatanga miihini. I muri i te tāpiri i ngā ngongo UV, ka taea te mimiti i tēnei mārama ultraviolet kaha-teitei, ka huri hei pūngao kino ka tukuna, ka pau rānei. Nā te rerekētanga o ngā momo polymers, he rerekē anō hoki ngā roangaru o ngā hihi ultraviolet e meinga ai rātou kia heke. Ka taea e ngā ngongo UV rerekē te mimiti i ngā hihi ultraviolet o ngā roangaru rerekē. I te wā e whakamahia ana, me whiriwhiri ngā ngongo UV kia rite ki te momo polymer.

Ngā momo mimiti UV

Ko ngā momo mimiti UV noa ko: benzotriazole (pērā iĀrai UV 327), benzophenone (pērā iĀrai UV 531), triazine (pērā i teĀrai UV 1164), me te amine ārai (pērā iWhakapūmau Mārama 622).

Ko ngā ngongo UV Benzotriazole te momo e whakamahia whānuitia ana i Haina i tēnei wā, engari he pai ake te pānga o ngā ngongo UV triazine i tērā o te benzotriazole. He tino pai ngā āhuatanga ngongo UV me ētahi atu painga o ngā ngongo Triazine. Ka taea te whakamahi whānuitia i roto i ngā polymer, he tino pai te pumau o te wera, he pai te pumau o te tukatuka, me te ātete ki te waikawa. I roto i ngā whakamahinga mahi, he pai te pānga tahi o ngā ngongo UV triazine me ngā whakaū mārama amine ārai. Ina whakamahia ngātahitia ngā mea e rua, he pai ake ngā pānga i te wā e whakamahia takitahi ana.

He maha ngā mea e kitea whānuitia ana hei mimiti i ngā hihi UV

(1)UV-531
He paura tioata kōwhai mārama, he mā rānei. Te mātotoru 1.160g/cm³ (25℃). Te ira rewa 48~49℃. Ka wairewa ki te acetone, te benzene, te etanoru, te isopropanol, he wairewa paku ki te dichloroethane, kāore e wairewa ki te wai. Ko te wairewa i roto i ētahi whakarewa (g/100g, 25℃) ko te acetone 74, te benzene 72, te methanol 2, te etanoru (95%) 2.6, te n-heptane 40, te n-hexane 40.1, te wai 0.5. Hei mimiti UV, ka taea e ia te mimiti kaha i te mārama ultraviolet me te roanga ngaru o te 270~330nm. Ka taea te whakamahi i roto i ngā momo kirihou, inā koa te polyethylene, te polypropylene, te polystyrene, te kapia ABS, te polycarbonate, te polyvinyl chloride. He pai te hototahi ki ngā kapia, ā, he iti te piki me te heke. Ko te horopeta whānui ko te 0.1%~1%. He pai te pānga mahi tahi ina whakamahia me te iti o te 4,4-thiobis (6-tert-butyl-p-cresol). Ka taea hoki te whakamahi i tēnei hua hei whakaū mārama mō ngā momo paninga.

(2)UV-327
Hei ngongo UV, he rite tonu ōna āhuatanga me ōna whakamahinga ki ērā o te benzotriazole UV-326. Ka taea e ia te ngongo kaha i ngā hihi ultraviolet me te roanga ngaru o te 270~380nm, he pai te pumau matū me te tino iti o te piki me te heke. He pai te hototahi ki ngā polyolefins. He tino pai mō te polyethylene me te polypropylene. Hei tāpiri, ka taea hoki te whakamahi mō te polyvinyl chloride, te polymethyl methacrylate, te polyoxymethylene, te polyurethane, te polyester unsaturated, te kapia ABS, te kapia epoxy, te kapia cellulose, me ētahi atu. He tino pai te ātete o tēnei hua ki te whakamahana, te ātete horoi, te ātete memeha hau me te pupuri i ngā āhuatanga miihini. He pānga mahi tahi nui tōna ina whakamahia tahitia me ngā antioxidants. Ka whakamahia hei whakapai ake i te pumau o te waikura wera o te hua.

(3)UV-9
He paura tioata kōwhai mārama, he mā rānei. Te mātotoru 1.324g/cm³. Te ira rewa 62~66℃. Te ira kohua 150~160℃ (0.67kPa), 220℃ (2.4kPa). Ka wairewa i roto i te nuinga o ngā whakarewa waro pēnei i te acetone, te ketone, te benzene, te methanol, te ethyl acetate, te methyl ethyl ketone, te etanoru, engari kāore e wairewa i roto i te wai. Ko te wairewa i roto i ētahi whakarewa (g/100g, 25℃) ko te whakarewa benzene 56.2, n-hexane 4.3, te etanoru (95%) 5.8, te waro tetrachloride 34.5, te styrene 51.2, te DOP 18.7. Hei ngongo UV, he pai mō ngā momo kirihou pēnei i te polyvinyl chloride, te polyvinylidene chloride, te polymethyl methacrylate, te unsaturated polyester, te ABS resin, te cellulose resin, me ētahi atu. Ko te whānuitanga roangaru ngongo mōrahi ko te 280~340nm, ā, ko te horopeta whānui ko te 0.1%~1.5%. He pai te pumau o te wera, ā, kāore e pirau i te 200℃. Kāore tēnei hua e mimiti i te mārama e kitea ana, nō reira he pai mō ngā hua mārama tae mārama. Ka taea hoki te whakamahi i tēnei hua ki ngā peita me te rapa hangai.