Nō nā tata nei, he maha ngā pātai kua tae mai ki a mātou mō te whakakapi i tā rātou parepare kiriaku tawhito ki tētahi parepare karāhe kua whakapakeketia.
Me whakamārama tuatahi tātou he aha te karāhe whakapakeke me te PMMA hei whakarōpūtanga poto:
He aha te karāhe kua whakapakeketia?
Karāhe whakamarokeHe momo karāhe haumaru e tukatukahia ana mā roto i ngā maimoatanga wera, matū rānei hei whakanui ake i tōna kaha ki te whakataurite ki te karāhe noa.
Mā te whakamahana ka pēhia ngā mata o waho, ka kumekume hoki ngā mata o roto.
Ka pakaru hei poraka ririki, kaua hei maramara koikoi, pērā i te karāhe whakamahana noa, ā, kāore he whara i te tangata.
Ko te nuinga o te wā ka whakamahia ki ngā hua hiko 3C, ki ngā whare, ki ngā waka, me te maha atu o ngā wāhanga.
He aha te PMMA?
Polymethyl methacrylate (PMMA), he kapia hangai i hangaia mai i te whakapūhuitanga o te methyl methacrylate.
He kirihou mārama, he pakari hoki,PMMAe whakamahia ana hei whakakapi mō te karāhe i roto i ngā hua pēnei i ngā matapihi ātete-pakaru, ngā matapihi tuanui, ngā tohu whakamārama, me ngā tuanui rererangi.
Ka hokona i raro i ngā tohu hokohokoPlexigglass, a Lucite, rāua ko Perspex.
He rerekē rātou i ngā āhuatanga e whai ake nei:
| Ngā Rerekētanga | Karāhe Whakamarumaru 1.1mm | PMMA 1mm |
| Te Pakari o Moh | ≥7H | Paerewa 2H, whai muri i te whakakaha ≥4H |
| Whakawhiti | 87~90% | ≥91% |
| Te pakari | Kāore e koroheke, kāore hoki e memeha te tae i muri i ngā tau | Ngāwari te koroheketanga me te kōwhai |
| Ātete Wera | Ka taea te tu i te pāmahana teitei 280°C me te kore e pakaru | Ka tīmata te PMMA ki te whakangawari ina 80°C te pāmahana |
| Mahi Pā | Ka taea te whakatutuki i te mahi pa me te tiaki | He mahi tiaki anake tā rātou |
E whakaatu mārama ana te kōrero i runga ake nei i te painga o te whakamahi i tētahiparenga karāhehe pai ake i te parenga PMMA, ko te tumanako ka āwhina i te whakatau wawe.
Wā tuku: Pipiri-12-2021