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Mōʻaukala o PET (Polyethylene terephthalate)

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Ma muli o ko lākou ʻike ʻia i ka makahiki 1941, ua hoʻokumu paʻa ʻia nā waiwai o polyester polymers i ka puluniu, ʻūlū a me nā ʻāpana palaka ʻano, mahalo i kā lākou hana kiʻekiʻe. Hana ʻia ka PET mai nā polymater thermoplastic crystallisable crystallisable kiʻekiʻe. He nui ka waiwai o ka polymer i kūpono i ka hana ʻana o nā mouldable wikiwiki, nā kūpanawewe kūpana wela a me nā huahana kalepa kiʻekiʻe. Loaʻa ka PET i nā māka aniani a me nā kala.

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Nā mea maikaʻi
Ma waena o nā pono ʻenehana o PET, hiki ke ʻōlelo ʻia o ke ahonui a me ka ʻoʻoleʻa maikaʻi loa. ʻO ka manawa pōʻai wikiwiki loa
a me nā ʻano kiʻi kaha hohonu me ka mānoanoa o ka paia. ʻAʻohe maloʻo o ka pā ma mua o ka hoʻoheheʻe ʻana. Ka laulā o ka hoʻohana (-40 ° a + 65 °). Hiki ke anuanu-hoʻokumu ʻia i ka lena ʻana. ʻO ke kūpaʻa maikaʻi loa i nā kemika, nā mea hoʻoheheʻe, nā mea hoʻomaʻemaʻe, nā aila a me nā mea momona a me nā mea kiʻekiʻe. He nui nā pono kalepa ʻo PET. ʻO ka manawa pōkole pōkole e hōʻoia i ka nui o ka hana i nā hana hoʻoheheʻe. Hoʻonani nani: gloss kiʻekiʻe, transparency kiʻekiʻe a i ʻole kaulike o ke kala a hiki ke paʻi maʻalahi ʻia a kāhiko ʻia ʻole me ka mālama mua ʻole ʻia. Hana maʻalahi ʻenehana a hiki ke hoʻohana hou ʻia.
 
Hoʻohana Mai ka manawa i hoʻolauna ʻia ma ka mākeke, ua loiloi maikaʻi ʻia ʻo PET ma nā ʻano ʻano like ʻole e like me nā mea hoʻomaʻemaʻe (bathtubs, shower cubicle), ke kālepa kūʻai kūʻai, nā kaʻa (a me nā caravans), nā kīʻaha kelepona, nā hale kaʻa kaʻa a pēlā aku. He kūpono ʻo PET no ka meaʻai. a me nā noi lapaʻau a no ka sterilization gamma-radiation.

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Aia he ʻelua ʻano nui o PET: Amorphous PET (APET) a me crystalline PET (CPET), ʻo ka ʻokoʻa nui a CPET i crystallized ʻāpana, ʻoiai ʻo APET kahi amorphous. Mahalo i kāna ʻāpana crystalline hale CPET opaque, ʻoiai ʻo APET kahi hanana amorphous, e hāʻawi ana iā ia i kahi aniani moakaka.


Ka manawa Post: Mar-17-2020