Ko ētahi o ngā āhuatanga matua o te polypropylene ko:
1. Ātete Matū: Kāore ngā kakano me ngā waikawa kua waimeha e tere te tauhohe ki te polypropylene, ā, he pai hoki mō ngā ipu wai pēnei, pērā i ngā kai horoi, ngā hua āwhina tuatahi, me ētahi atu.
2. Te Āhuatanga me te Pakari: Ka mahi te polypropylene me te āhua ngāwari i runga i tētahi whānuitanga o te piko (pērā i ngā rauemi katoa), engari ka pāngia hoki e te āhua kirihou i te tīmatanga o te tukanga whakarerekētanga, nō reira e kiia ana he rauemi "pakari". Ko te pakari he kupu hangarau e tautuhia ana ko te kaha o te rauemi ki te whakarerekē (kirihou, ehara i te mea ngāwari) me te kore e whati.
3. Ātete ki te Ngenge: Ka mau tonu te āhua o te polypropylene ahakoa te maha o ngā takahurihuri, te piko, me/ranei te piko. He tino whai hua tēnei āhuatanga mō te hanga i ngā inihi ora.
4. Ārai: he tino kaha te ātete o te polypropylene ki te hiko, ā, he tino whai hua mō ngā wāhanga hiko.
5. Te Tukunga: Ahakoa ka taea te hanga i te polypropylene kia mārama, he mea hanga noa kia kore e mārama te tae. Ka taea te whakamahi i te polypropylene mō ngā tono e hiahiatia ana te whakawhiti mārama, e whai uara ataahua ana rānei. Mena e hiahiatia ana te tukunga teitei, he pai ake ngā kirihou pēnei i te Acrylic, te Polycarbonate rānei.
E whakarōpūtia ana te polypropylene hei rauemi "thermoplastic" (he rerekē ki te "thermoset") e pā ana ki te āhua o te urupare a te kirihou ki te wera. Ka wai ngā rauemi thermoplastic i tō rātou ira rewa (tata ki te 130 nekehanga Celsius mō te polypropylene).
Ko tētahi āhuatanga nui o ngā kirihou wera ko te taea te whakamahana ki tōna taumata rewa, te whakamatao, me te whakamahana anō me te kore e tino pirau. Engari ko ngā kirihou wera pērā i te polypropylene, ka waimeha, ka ngāwari ai te werohanga, kātahi ka hangarua.
He rerekē, kotahi anake te wā ka taea te whakamahana i ngā kirihou thermoset (i te nuinga o te wā i te tukanga werohanga). Mā te whakamahana tuatahi ka whakapūmau ngā rauemi thermoset (he rite ki te epoxy e rua-wāhanga) ka puta he huringa matū e kore e taea te huri. Mena ka ngana koe ki te whakamahana i te kirihou thermoset ki te pāmahana teitei mō te wā tuarua, ka mura noa iho. Nā tēnei āhuatanga ka kore e pai ngā rauemi thermoset mō te hangarua.
Wā tuku: 19 o Ākuhata 2022