ʻO Polyethylene terephthalate ʻO ke ʻano kemika -OCH2-CH2OCOC6H4CO- Inoa Pelekania: polyethylene terephthalate, i hoʻopōkole ʻia ʻo PET, he polymer kiʻekiʻe, i loaʻa mai ka hopena condensation dehydration o ka ethylene terephthalate. Loaʻa ka Ethylene terephthalate ma o ka hopena esterification o ka terephthalic acid a me ka ethylene glycol. He polymer keʻokeʻo waiū a melemele māmā paha ʻo PET, he crystalline kiʻekiʻe me kahi ʻili laumania a ʻālohilohi. Loaʻa iā ia nā waiwai kino a me nā mechanical maikaʻi loa i kahi ākea ākea. Hiki i ka mahana hoʻohana lōʻihi ke hiki i 120°C. Maikaʻi loa ka insulation uila. ʻOiai ma ke kiʻekiʻe o ka mahana a me ke alapine kiʻekiʻe, maikaʻi nō kona mau waiwai uila, akā maikaʻi ʻole ke kū'ē ʻana o ka corona. Maikaʻi loa ke kū'ē ʻana i ka kolo, ke kū'ē ʻana i ka luhi, ke kū'ē ʻana i ka friction, a me ke kūpaʻa dimensional.
pono
1, he maikaʻi nā waiwai mechanical, ʻo ka ikaika hopena he 3 ~ 5 mau manawa o nā kiʻiʻoniʻoni ʻē aʻe, a maikaʻi ke kūpaʻa pelu.
2, kū i ka ʻaila, ka momona, ka waikawa dilute, ka alkali dilute, a me ka hapa nui o nā mea hoʻoheheʻe.
3, he kūpaʻa maikaʻi loa ia i ke kiʻekiʻe a me ka haʻahaʻa o ka mahana. Hiki ke hoʻohana ʻia no ka manawa lōʻihi ma ka pae mahana o 120 ℃, a hiki ke kū i ka mahana kiʻekiʻe o 150 ℃ a me ka mahana haʻahaʻa o -70 ℃ i ka hoʻohana pōkole, a ʻaʻole nui ka hopena o nā waiwai mechanical o ke kiʻekiʻe a me ka haʻahaʻa.
4, haʻahaʻa ka permeability o ke kinoea a me ka wai, ʻo ia hoʻi, he kūpaʻa maikaʻi loa ia i ke kinoea, ka wai, ka aila a me nā ʻala.
5, kiʻekiʻe ka mālamalama, hiki ke ālai i nā kukuna ultraviolet, maikaʻi ka ʻōlinolino.
6, ʻaʻohe ʻawahia, ʻono ʻole, hoʻomaʻemaʻe maikaʻi a palekana, hiki ke hoʻohana pololei ʻia no ka hoʻopili ʻana i ka meaʻai.
He polymer keʻokeʻo waiū a melemele māmā paha ʻo PET me kahi ʻili laumania a ʻālohilohi. Kūpaʻa maikaʻi i ka kolo ʻana, kūpaʻa i ka luhi, kūpaʻa i ka friction a me ke kūpaʻa dimensional, haʻahaʻa ka abrasion a me ka paʻakikī kiʻekiʻe, me ka paʻakikī nui loa ma waena o nā mea thermoplastic: insulation uila maikaʻi, mana haʻahaʻa haʻahaʻa, akā kūpaʻa corona maikaʻi ʻole. Mahana, kūpaʻa i ke aniau, kūpaʻa kemika maikaʻi, haʻahaʻa ka omo wai, kūpaʻa i nā waikawa nāwaliwali a me nā mea hoʻoheheʻe organik, akā ʻaʻole i hoʻokomo ʻia i loko o ka wai wela a me ka alkali. Loaʻa i ka resin PET ka mahana hoʻololi aniani kiʻekiʻe, wikiwiki crystallization lohi, pōʻaiapuni hoʻoheheʻe lōʻihi, pōʻaiapuni hoʻoheheʻe lōʻihi, hoʻemi nui ʻana i ka hoʻoheheʻe ʻana, kūpaʻa dimensional maikaʻi ʻole, brittleness o ka hoʻoheheʻe kristal, a me ke kūpaʻa wela haʻahaʻa. Ma o ka hoʻomaikaʻi ʻana o ka mea nucleating, crystallization agent a me ka hoʻoikaika ʻana i ke aniani fiber, loaʻa iā PET nā ʻano aʻe ma waho aʻe o nā waiwai o PBT:
1, ʻo ka mahana hoʻopilikia wela a me ka mahana hoʻohana lōʻihi ka mea kiʻekiʻe loa ma waena o nā mea hana maʻamau thermoplastic.
2, ma muli o kona kūpaʻa wela kiʻekiʻe, ua hoʻokomo ʻia ʻo PET i hoʻoikaika ʻia i loko o kahi ʻauʻau solder ma 250°C no 10 kekona, a aneane ʻaʻole e loli ke kala. He kūpono loa ia no ka hoʻomākaukau ʻana i nā ʻāpana uila a me nā ʻāpana uila i solder ʻia.
3, ʻo ka ikaika kūlou he 200Mpa, ʻo ka modulus elastic he 4000Mpa, maikaʻi loa hoʻi ke kūpaʻa kolo a me ka luhi, kiʻekiʻe ka paʻakikī o ka ʻili, a like nā waiwai mechanical me nā plastics thermosetting.
4, ʻoiai ʻo ka ethylene glycol i hoʻohana ʻia i ka hana ʻana o PET he hapalua ia o ke kumukūʻai o ka butylene glycol i hoʻohana ʻia i ka hana ʻana, ʻo ka resin PET a me ka PET i hoʻoikaika ʻia ke kumukūʻai haʻahaʻa loa ma waena o nā plastics ʻenekinia a he hana kumukūʻai kiʻekiʻe.