He aha ka PE?
ʻO PE, i kapa ʻia ʻo polyethylene (Polyethylene), ʻo ia kekahi o nā mea i hoʻohana nui ʻia ma ka honua. Ma muli o kāna mau waiwai kino a me nā kemika maikaʻi, hoʻohana ʻia nā mea PE ma kahi ākea o nā ʻoihana. Mai nā ʻeke ʻeke a hiki i nā mea paipu, kokoke ka polyethylene i nā wahi āpau. Ma kēia ʻatikala, e ʻimi kikoʻī mākou i ka PE, kona ʻano, nā waiwai a me nā wahi o ka noi.
1. Ka hoʻolālā kemika a me ka hoʻokaʻawale ʻana o PE
ʻO ka PE he resin thermoplastic i hana ʻia mai nā monomers ethylene ma o ka hopena polymerization. Ma muli o ke kaomi a me nā kūlana wela i ka wā o ka polymerization, hiki ke hoʻokaʻawale ʻia nā mea PE i kekahi mau ʻano:
ʻO ka Polyethylene Low Density (LDPE): ʻO kēia ʻano mea PE i hoʻonohonoho ʻia ma waena o nā kaulahao molecular a he haʻahaʻa haʻahaʻa. ʻO ka LDPE ka maʻalahi a me ka ductility maikaʻi, a hoʻohana nui ʻia i ka hana ʻana i nā kiʻiʻoniʻoni plastik, nā mea hoʻopihapiha, a me nā kiʻiʻoniʻoni mahiʻai.

High Density Polyethylene (HDPE): Hoʻonohonoho paʻa ʻia nā kaulahao mole o HDPE a ʻoi aku ka kiʻekiʻe kiʻekiʻe, no laila e hōʻike ana i ka ikaika maikaʻi a me ke kūpaʻa kemika. Hoʻohana mau ʻia ʻo HDPE i ka hana ʻana i nā paipu, nā ʻōmole a me nā ipu plastik.

Linear Low Density Polyethylene (LLDPE): ʻO LLDPE kahi polyethylene haʻahaʻa haʻahaʻa me kahi ʻano mole mole laina e hoʻohui i ka maʻalahi o LDPE me ka ikaika o HDPE. Hoʻohana maʻamau ia e hana i nā kiʻi ʻoniʻoni, nā ʻeke plastik a me nā mea hoʻopili ʻenehana.

2. Nā hiʻohiʻona nui o nā mea PE
Loaʻa i ka mea PE ka nui o nā waiwai kino a me nā mea kemika ma muli o kāna ʻano molecular kū hoʻokahi, kahi e hoʻomaikaʻi ai i ka nui o nā noi:
Ke kū'ē kemika: He kū'ē maikaʻi ka mea PE i ka hapa nui o nā waikawa, nā alkalis, nā paʻakai a me nā mea hoʻoheheʻe i ka lumi wela, kahi e kūpono ai no ka ʻoihana kemika a me ka lāʻau lapaʻau.

ʻO ke kūpaʻa hopena maikaʻi a me ka ikaika tensile: ʻO HDPE, ʻoi aku ka ikaika kiʻekiʻe a me ka rigidity a hiki ke kū i ke koʻikoʻi mechanical kiʻekiʻe, e hana maʻamau ia i ka hana ʻana i nā huahana pono e kū i nā ukana.

ʻO nā waiwai insulating maikaʻi loa: ʻO ka mea PE he insulator uila maikaʻi loa, e hoʻohana nui ʻia ia ma ke ʻano he insulating layer no nā kaula a me nā uea.

ʻO ka wai haʻahaʻa haʻahaʻa: He haʻahaʻa loa ka haʻahaʻa o ka wai o ka mea PE a no laila e paʻa i kona mau waiwai kino i nā wahi haʻahaʻa.

3. Nā wahi noi o nā mea PE
Mahalo i kā lākou ʻano like ʻole a me nā waiwai maikaʻi loa, he mea koʻikoʻi nā mea PE i ke ola o kēlā me kēia lā a me ka ʻoihana. ʻO ka ʻike ʻana i ke ʻano o ka PE e kōkua iā mākou e hoʻomaopopo maikaʻi i kāna ʻano ākea o nā noi ma nā kahua like ʻole:
ʻOihana Packaging: Hoʻohana nui ʻia nā mea PE i ka hana ʻana i nā kiʻiʻoniʻoni plastik, nā ʻeke ʻeke meaʻai a me nā kiʻi ʻoniʻoni mahiʻai. He kūpono loa ka LDPE a me LLDPE no ka hana ʻana i nā ʻano mea hoʻopihapiha ma muli o ko lākou maʻalahi a me ka ductility.

ʻO ka hana hana a me ka ʻoihana paipu: Hoʻohana pinepine ʻia ʻo HDPE i ka hana ʻana i nā pipeline wai, nā pipeline gas a me nā pipeline kemika ma muli o kona ʻano maikaʻi loa a me ka pale ʻana i ka corrosion.

Nā huahana hale: Nui nā huahana plastik i kēlā me kēia lā, e like me nā bākeke, ʻeke ʻōpala a me nā pahu mālama meaʻai, i hana ʻia mai ka polyethylene.

4. Ka palekana a me ka hana hou ʻana i nā mea PE
ʻOiai ka nui o kāna mau pono, ʻo ka hoʻohana nui ʻana i nā mea PE ua lawe mai i nā pilikia kaiapuni. No ka mea ʻaʻole ia e hoʻohaʻahaʻa maʻalahi, hiki i nā huahana PE i hoʻolei ʻia ke loaʻa nā hopena maikaʻi ʻole no ka wā lōʻihi i ke kaiaola. Hiki ke hana hou ʻia nā mea polyethylene. Ma o nā ʻano hana kino a i ʻole kemika, hiki ke hana hou ʻia nā huahana PE i hoʻolei ʻia i mau mea hou, no laila e hōʻemi ana i ka hopena i ke kaiapuni.
Ka hopena
Ma o ka nānā ʻana i luna, loaʻa iā mākou kahi ʻike kikoʻī o ka pilikia o "he aha ka mea PE". Ma ke ʻano he mea plastik koʻikoʻi nui, hoʻohana nui ʻia ka polyethylene i nā ʻoihana like ʻole ma muli o kona ʻano kūʻokoʻa a me nā waiwai maikaʻi loa. ʻOiai ʻo kona hoʻohana ʻana he mau pilikia kaiapuni, hiki ke hoʻokō ʻia ka hoʻokele hoʻomau o nā mea PE ma o ka hana hou ʻana.