ʻO ka ʻokoʻa ma waena o ka LDPE a me ka HDPE Plastic ma nā noi ʻoihana
ʻO ka palakiko kekahi o nā mea hana maʻalahi loa a hoʻohana nui ʻia i nā noi ʻoihana like ʻole. ʻElua ʻano palakiko i kūkākūkā pinepine ʻia ma kēia ʻano, ʻo ia ka Low-Density Polyethylene (LDPE) a me ka High-Density Polyethylene (HDPE). He mau polymers ʻelua o ka ethylene, akā he ʻokoʻa ko lākou i ke ʻano, nā waiwai kino, a me ka hiki ke hoʻohana. E kūkākūkā kēia ʻatikala i nā ʻokoʻa ma waena o LDPE a me HDPE, ʻoi aku hoʻi i loko o ke ʻano o nā noi ʻoihana.
ʻAno Kemika a me ke Kaʻina Hana
LDPE (Polyethylene Haʻahaʻa Haʻahaʻa)
He ʻano polyethylene ka LDPE me kahi ʻano molekala lālā kiʻekiʻe. Hoʻohana ke kaʻina hana LDPE i kahi ʻano polymerization radical manuahi ma lalo o ke kaomi kiʻekiʻe (1.000-3.000 bar) a me ka mahana kiʻekiʻe (160-300°C). Hāʻawi kēia ʻano lālā i ka LDPE i kahi ākea nui ma waena o kona mau kaulahao molekala, e hopena ana i ka haʻahaʻa haʻahaʻa a me ka maʻalahi mechanical nui aʻe.
HDPE (Polyethylene Māmā Kiʻekiʻe)
I ka hoʻohālikelike ʻana, he ʻano linear ko HDPE me nā lālā liʻiliʻi. Hoʻohana kāna kaʻina hana i ka polymerization catalytic ma nā kaomi haʻahaʻa (10-80 bar) a me nā mahana haʻahaʻa (70-300°C). ʻO kēia ʻano molekala linear a paʻa e hāʻawi iā HDPE i kahi density kiʻekiʻe ma mua o LDPE, a me ka paʻakikī a me ka ikaika i nā waiwai mechanical.
Nā Waiwai Kino a me nā Waiwai Mekanika
Paʻakikī a me ka paʻakikī
ʻOi aku ka paʻakikī a me ke kūpaʻa o ka HDPE ma mua o ka LDPE. ʻOi aku ka paʻakikī o ka HDPE i ka deformation ma lalo o nā ukana kaumaha, e kūpono ai no nā noi e pono ai ka ikaika kūkulu kiʻekiʻe. Ma ka ʻaoʻao ʻē aʻe, ʻoi aku ka maʻalahi a me ka elastic o ka LDPE, e kūpono ai no nā noi e pono ai ka flex a me ka maʻalahi.
Ke kū'ē ʻana i ka mahana a me nā kemika
ʻOi aku ka haʻahaʻa o ka pae mahana hana o ka LDPE ma mua o ka HDPE. Eia nō naʻe, kūpaʻa nā mea ʻelua i nā kemika he nui. ʻOi aku ka maikaʻi o ke kūpaʻa o ka HDPE i nā kemika a me nā mea hoʻoheheʻe, ʻoiai ʻoi aku ka maʻalahi o ka hoʻohaumia ʻia o ka LDPE e ka oxidation i nā mahana kiʻekiʻe.
Ke kū'ē ʻana i ka hopena
ʻOi aku ka maikaʻi o ka LDPE i ke kūpaʻa ʻana i ka hopena ma muli o kona palupalu nui. I nā mahana haʻahaʻa, ʻaʻole maʻalahi ka haki a haki paha o ka LDPE. ʻOiai ʻoi aku ka paʻakikī o ka HDPE, hiki ke lilo i mea palupalu i nā mahana haʻahaʻa loa.
Ke kū'ē ʻana i ka wai a me ka mahu
Ua ʻike ʻia nā ʻano polyethylene ʻelua no ko lākou kūpaʻa ʻana i ka wai, akā ʻoi aku ka haʻahaʻa o ka omo ʻana o ka mahu wai o HDPE. ʻO kēia ka mea e hoʻohana pinepine ʻia ai ka HDPE i nā noi e koi ana i ke kūpaʻa ʻana i ka makū a me nā kūlana pulu.
Nā Noi ʻOihana
Ka Hoʻopili ʻana a me ka Mālama ʻana
Hoʻohana nui ʻia ka LDPE i nā noi hoʻopili palupalu e like me nā ʻeke plastik, nā ʻili ʻōwili, a me nā ʻōmole, pono e noho palupalu i ka wā e hoʻohana ai. Ma muli o kona moakaka, hoʻohana pinepine ʻia ka LDPE ma ke ʻano he ʻili hoʻopili e pono ai ka ʻike ʻia o ka huahana.
Ma ka ʻaoʻao ʻē aʻe, hoʻohana pinepine ʻia ka HDPE i nā ʻōpala e pono ai ka ikaika a me ke kūpaʻa, e like me nā ʻōmole waiū, nā ʻōpala kemika, a me nā kini jerry. Hoʻohana ʻia hoʻi ka HDPE e hana i nā paipu wai a me ke kinoea ma muli o kona kūpaʻa maikaʻi i ke kaomi a me nā kemika.
ʻOihana Kūkulu
I ka ʻoihana kūkulu hale, hoʻohana nui ʻia ka HDPE ma muli o kona ikaika a me ke kūpaʻa ʻana i nā ʻano ʻino. Hoʻohana ʻia nā paipu HDPE no nā ʻōnaehana wai, kinoea, a me nā ʻōnaehana wai ʻino. Eia kekahi, hoʻohana ʻia ka HDPE i nā noi geotextile a ma ke ʻano he uhi pale ma nā mea kūkulu hale ʻē aʻe.
Hoʻohana pinepine ʻia ka LDPE ma ke ʻano he uhi pale no nā kaula uila a ma ke ʻano he kiʻiʻoniʻoni pale i ke kūkulu ʻana, ʻo ia hoʻi ma muli o kona maʻalahi a me ke kūʻē ʻana i ka hopena.
Mahiai
I ka mahiʻai, hoʻohana pinepine ʻia ka LDPE e hana i nā ʻili plastik no ka mulch, e kōkua ana i ka kaohi ʻana i nā nāhelehele a mālama i ka makū o ka lepo. Ma muli o kona maʻalahi a me ka hiki ke kū i ka hau, hoʻohana ʻia ka LDPE i ke kūkulu ʻana i nā tunnel a me nā hale ʻōmaʻomaʻo.
Hoʻohana ʻia ka HDPE no nā paipu ʻōʻō e pono ai ke kū'ē i ke kaomi wai kiʻekiʻe. ʻO kona kūpaʻa kemika hoʻi e lilo ia i koho koʻikoʻi no nā ʻōnaehana ʻōʻō e pono ai nā noi mea hoʻoulu a me nā pesticides.
Nā Huahana Mea kūʻai aku a me ka halihali
Hoʻohana ʻia ʻo LDPE i ka hana ʻana i nā mea pāʻani a nā keiki, nā mea hale, a me nā mea lapaʻau hoʻolei ʻia ma muli o kona palekana a me ka maʻalahi. ʻO HDPE, me kona ikaika a me ke kūpaʻa, hoʻohana pinepine ʻia i ka hana ʻana i nā pahu, nā pallets, a me nā ipu nui i hoʻohana ʻia i ka lawe ʻana a me ka mālama ʻana i nā waiwai.
Kaiapuni a me ka hana hou ʻana
ʻOkoʻa nō hoʻi kēia mau ʻano palakiko ʻelua ma ke ʻano o nā hopohopo no ke kaiapuni a me ka hana hou ʻana. ʻOi aku ka maʻalahi o ka hana hou ʻana o ka HDPE a ʻoi aku ka nui o nā noi hana hou ma mua o ka LDPE. Hoʻohana pinepine ʻia nā huahana HDPE hana hou ʻia i ka hana ʻana i nā paipu, nā ipu, a me nā mea o ka hale.
ʻOiai hiki ke hana hou ʻia ka LDPE, ʻoi aku ka paʻakikī ma muli o kona maʻalahi a me ka haumia pinepine ʻana me nā mea ʻē aʻe. Eia nō naʻe, me ka holomua o ka ʻenehana, ke piʻi nei ka hana hou ʻana o ka LDPE.
Ka hopena
I ka ʻoihana hou, hoʻokani ʻo LDPE a me HDPE i nā kuleana koʻikoʻi a hoʻopiha. ʻO LDPE, me kona maʻalahi a me ke kūpaʻa i ka hopena, ʻoi aku ka maikaʻi no nā noi e pono ai ka maʻalahi a me ka hoʻopili maʻalahi. I ka ʻaoʻao ʻē aʻe, ʻoi aku ka maikaʻi o HDPE, me kona paʻakikī a me ka ikaika, no nā noi e pono ai ka ikaika kūkulu kiʻekiʻe a me ke kūpaʻa.
ʻO nā ʻokoʻa o ke ʻano kemika a me nā kaʻina hana ma waena o LDPE a me HDPE e hoʻopilikia i ko lākou mau waiwai kino a me nā mechanical, ka mea e hoʻoholo ai i kā lākou noi kūpono i nā ʻoihana like ʻole. ʻO ka hoʻomaopopo ʻana i kēia mau ʻokoʻa ke kī i ke koho ʻana i nā mea kūpono no nā pono kikoʻī, e hōʻoiaʻiʻo ana i ka pono a me ka hana kūpono i kēlā me kēia noi ʻoihana.
