He aha te PTFE?
Ko te PTFE e mōhiotia whānuitia ana ko te "kingi kirihou", he pūmua i hangaia mai i te tetrafluoroethylene hei monomer. I kitea e Tākuta Roy Plunkett i te tau 1938. Tērā pea kei te āhua rerekē tonu koe ki tēnei matū, engari kei te mahara koe ki te paraharaha kore-piri i whakamahia e mātou? Kua pania te paraharaha kore-piri ki te mata o te paraharaha ki te paninga PTFE, kia kore ai te kai e piri ki raro o te paraharaha, e whakaata ana i te ātete pāmahana teitei me ngā āhuatanga whakahinuhinu teitei o te PTFE. I ēnei rā, ka hangaia ngā rauemi mata paura PTFE hei hua o ngā āhua rerekē, pērā i ngā ngongo PTFE, te kiriata angiangi PTFE, ngā pae PTFE, me ngā pereti PTFE, e whakamahia ana i roto i ngā mara rerekē. Muri iho, ka matapakihia e mātou te whakamahinga o ngā ngongo PTFE i roto i ngā taputapu tā 3D.
He paitini te PTFE?
He tautohenga te kaupapa mō te paitini o te PTFE, ā, ehara i te mea paitini te PTFE.
Engari i te wā i tāpirihia ai te PFOA (Perfluorooctanoic Acid) ki ngā kai o te PTFE i mua, ka tukuna te paitini ina whakamahia i ngā pāmahana teitei. He uaua te pirau o te PFOA mai i te taiao, ā, ka uru pea ki te tangata me ētahi atu rauropi mā roto i ngā mea ā-tinana, te hau me te wai, ā, i roto i te wā ka heke te tere o te whānautanga me ētahi atu mate pūnaha ārai mate. Engari inaianei kua aukatia te PFOA e ngā mana whakahaere kia kaua e tāpirihia ki ngā kai o te PTFE. E whakaatu ana hoki ā mātou pūrongo whakamātautau rauemi mata katoa kāore he wāhanga PFOA.
He aha i whakamahia ai e ngā pūreretā 3D ngā ngongo PTFE?
I te tere o te whanaketanga o The Times, he hangarau hanga tere te pūreretā 3D, e mōhiotia ana ko te hanga tāpiri. He tukanga honohono, he whakaora rānei i ngā rauemi i raro i te mana rorohiko hei whakaputa i ngā mea toru-ahu, ko te tikanga he whakamahi i ngā ngota wai, i ngā matūriki paura rānei hei whakakotahi, ā, hei hanga i ngā mea paparua i te paparua. I tēnei wā, ko te hangarau hanga tā 3D kei roto whānuitia: te tikanga whakatakoto whakarewa, pērā i te whakamahinga o ngā rauemi whakarewa pūnaha tioata thermoplastic noa, he puhoi te tere hanga, ā, he pai ake te rere o te whakarewa o ngā rauemi;
Heoi, he taonga tuku iho tō ngā pūreretā 3D, arā, he ngāwari te mono! Ahakoa he iti te tere o te rahunga o te pūreretā 3D, ina puta, ehara i te mea ka pā ki te kounga o te tā, engari ka moumou taima me ngā rauemi tā, ā, ka kino hoki te mīhini. He tokomaha e whakapae ana he wera rawa te ngongo korokoro nā te mea he tāpiringa. Nā te mea he nui te pāmahana tonu e hiahiatia ana mō ngā rauemi hangarau, he tino teitei ngā whakaritenga mō ngā wāhanga. Nō reira, ka whakamahia e te pūreretā 3D te ngongo PTFE hei ngongo whāngai. He maha ngā rauemi mata me kawe ki te pane o te pūreretā i roto i te āhua rewa, ā, me tutuki i te ngongo kawe ngā whakaritenga wāhi o te pūreretā, nō reira he maha ngā kaihanga e huri ana ki te ngongo tarakona rino fluorine kua hangaia ki roto, he iti te kawe wera o te tarakona rino fluorine me te kowiri tira, ka taea te whakaiti i te pāmahana o te ngongo korokoro, me te ngongo tarakona rino fluorine, ka tino heke te tere rahunga o te mono. Nō reira, koinei te kōwhiringa pai rawa atu mō ngā pūreretā 3D.
Mena kei roto koe i te pakihi tā 3D, tera pea ka pai koe ki a koe
Koinei te whakataki whānui o ngā āhuatanga matua o ngā ngongo PTFE:
1. Kāore e piri: He mea kore e mau, ā, kāore te nuinga o ngā matū e piri ki a ia.
2. Ātete wera: he tino pai te ātete wera o te ferroflurone. Ka taea te whakamahi tonu i ngā mahi whānui i waenga i te 240℃ me te 260℃. He ātete pāmahana poto ki te 300℃ me te ira rewa o te 327℃.
3. Whakahinuhinu: He iti te tauwehenga waku o te PTFE. Ka rerekē te tauwehenga waku ina paheke te kawenga, engari kei waenganui i te 0.04 me te 0.15 anake te uara.
4. Ātete ki te huarere: kāore e koroheke, ā, he pai ake te ora o te kirihou.
5. Kore-paitini: i roto i te taiao noa i roto i te 300℃, he ātete ā-tinana tōna, ā, ka taea te whakamahi mō ngā taputapu hauora me te kai.
Ehara i te mea ko te whiriwhiri i ngā momo whakaritenga mō ngā tono rerekē anake te mea e tika ana kia hokona e koe ngā ngongo PTFE tika. He nui ake ngā mea hei whiriwhiri i tētahi kaihanga pono. He tohunga a Besteflon Fluorine plastic Industry Co., Ltd. ki te hanga ngongo me ngā ngongo PTFE kounga teitei mō ngā tau 15. Mena he pātai, he hiahia rānei āu, tēnā whakapā mai ki a mātou mō ētahi atu tohutohu ngaio.
Ngā tuhinga e pā ana
Wā tuku: 27 o Ākuhata-2022