He nui nā mea kūʻai aku ma o kā mākou pūnaewele e kelepona i ka ʻōlelo aʻoaʻo e pili ana i ke kaulana o nā ʻano ʻeke ulana, a laila i kēia lā ʻo DongLai ʻeke ulana Xiaobian e wehewehe i ke kaulana o nā ʻano ʻeke ulana.
Nā ʻano ʻeke i ulana ʻia
Ua kapa ʻia hoʻi nā ʻeke ulana he ʻeke ʻili nahesa. He ʻano palakika ia, i hoʻohana nui ʻia no ka hoʻopili ʻana. ʻO ka mea maka he polyethylene, polypropylene a me nā mea maka palakika kemika ʻē aʻe. Eia kahi hoʻolauna pōkole i ke ʻano o ka ʻeke ulana a me ka hoʻohana.
ʻO Polyethylene ka mea maka nui o ka hana ʻana ma waho, ʻo ka polypropylene ka huahana nui o ka home. He resin thermoplastic i hana ʻia e ka polymerization o ka ethylene. I ka ʻoihana, aia pū kekahi mau copolymers o ka ethylene me kahi liʻiliʻi o ka α-olefin. ʻAʻohe ʻala o ka Polyethylene, ʻaʻohe ʻawaʻawa, waxy, he kūpaʻa haʻahaʻa maikaʻi loa (ka mahana hana haʻahaʻa a hiki i -70 ~ -100 ℃), kūpaʻa kemika maikaʻi, ka nui o ke kūpaʻa ʻana i ka waikawa a me ka alkali (kūʻē i ka waikawa, oxidation), ʻaʻole hiki ke hoʻoheheʻe ʻia i nā mea hoʻoheheʻe maʻamau i ka mahana o ka lumi, haʻahaʻa ka omo wai, hana insulation uila maikaʻi loa; Eia nō naʻe, he maʻalahi loa ka polyethylene i nā kaomi o ke kaiapuni (nā hopena kemika a me ka mechanical) a he kūpaʻa haʻahaʻa i ka ʻelemakule wela. ʻOkoʻa nā waiwai o ka polyethylene mai nā ʻano like ʻole, ma muli o ke ʻano molekala a me ka density. Hiki i nā ʻano hana like ʻole ke hoʻopuka i nā densities like ʻole (0.91-0.96g/cm3). Hiki ke hana ʻia ka Polyethylene ma ke ʻano like me ka hoʻoheheʻe ʻia ʻana o nā plastics thermoplastic maʻamau (e ʻike i ka hana Plastic). Hoʻohana nui ʻia i ka hana ʻana o nā kiʻiʻoniʻoni, nā ipu, nā paipu, ka uea hoʻokahi, ka uea a me ke kaula, nā mea e pono ai i kēlā me kēia lā, a pēlā aku. Hiki ke hoʻohana ʻia ma ke ʻano he mea hoʻokaʻawale alapine kiʻekiʻe no ka TV, radar, a pēlā aku. Me ka hoʻomohala ʻana o ka ʻoihana petrochemical, ua ulu wikiwiki ka hana polyethylene, e helu ana ma kahi o 1/4 o ka huina o ka hana plastik. I ka makahiki 1983, ʻo ka nui o ka hana polyethylene o ka honua he 24.65 metric tons, a ʻo ka hale hana i kūkulu ʻia he 3.16 metric tons.
Polypropylene (PP)
He resin thermoplastic i hana ʻia e ka polymerization o ka propylene. ʻEkolu ʻano o nā hoʻonohonoho ʻana, ʻo ia hoʻi, ka isotopic piha, ka atactic a me ka indirect. ʻO nā huahana ʻoihana i hana nui ʻia me nā ʻano isotopic. Loaʻa pū kekahi i ka Polypropylene kahi copolymer o ka propylene a me kahi liʻiliʻi o ka ethylene. He translucent maʻamau ia, ʻaʻohe kala, ʻaʻohe ʻala a ʻaʻohe ʻawaʻawa. Ma muli o kona ʻano hoʻonohonoho, kiʻekiʻe ka crystallinity, melting point a hiki i ka 167 ℃, ke kūpaʻa wela. Me ka density o 0.90g/cm3, ʻo ia ka plastic versatile māmā loa. ʻOi aku ka maikaʻi o ke kūpaʻa ʻana i ka corrosion, ka ikaika tensile 30MPa, ka ikaika, ka paʻakikī a me ka transparency ma mua o ka polyethylene. ʻO ka hemahema, ʻo ke kūpaʻa hopena haʻahaʻa haʻahaʻa he haʻahaʻa, maʻalahi ke ʻelemakule, akā hiki ke hoʻololi a hoʻohui ʻia i ka antioxidant e lanakila ai.
ʻO ke kala o ka ʻeke ulana he keʻokeʻo a keʻokeʻo paha, ʻaʻohe mea ʻawahia a ʻono ʻole, akā ʻoi aku ka liʻiliʻi o ka pōʻino i ke kino o ke kanaka. ʻOiai i hana ʻia me nā ʻano plastik kemika like ʻole, akā ikaika ka palekana o ke kaiapuni a me ka ikaika hana hou;
Hoʻohana nui ʻia ka ʻeke ulana, hoʻohana nui ʻia no ka hoʻopili ʻana i nā ʻano waiwai like ʻole, a hoʻohana nui ʻia i ka ʻoihana;
ʻEke ulana plastik me ka resin polypropylene ma ke ʻano he mea maka nui, extrusion a hohola i loko o ke kaula pālahalaha, a laila ulana ʻia i loko o kahi ʻeke.
ʻEke ulana plastik hui pū ʻia me ka lole ulana plastik ma ke ʻano he mea kumu, ma o ke kahe ʻana o ke kahe.
Hoʻohana ʻia no ka hoʻopili ʻana i ka pauka a i ʻole nā mea paʻa granular a me nā mea palupalu. Ua māhele ʻia ka ʻeke ulana plastik composite i ʻelua i loko o hoʻokahi ʻeke a ʻekolu i loko o hoʻokahi ʻeke e like me ke ʻano o ka mea nui.
Wahi a ke ʻano humuhumu, hiki ke puʻunaue ʻia i ka ʻeke humuhumu lalo, ka ʻeke humuhumu ʻaoʻao lalo, ka ʻeke hoʻokomo a me ka ʻeke humuhumu i uhi ʻia me ke kāpili.
Ma muli o ka laulā kūpono o ka ʻeke, hiki ke puʻunaue ʻia i 450, 500, 550, 600, 650 a me 700 mm. E ʻaelike ʻia nā kikoʻī kūikawā e nā ʻaoʻao ʻelua.
ʻO luna aʻe ka kaulana o ka hoʻopili liʻiliʻi no nā ʻano hoʻopau āpau o ka ʻeke ulana e pili ana i ka ʻōlelo aʻoaʻo, ma o ka kaʻana like ʻana i ka ʻike, i ka hoʻolaha ʻana o nā ʻano ʻeke ulana i loaʻa kekahi ʻike noʻonoʻo, inā makemake ʻoe e hele hohonu i loko o ka ʻeke o ka ʻike mākeke, hiki ke hoʻokaʻaʻike aku i ka mea kūʻai aku ma kā mākou hui, a i ʻole ma ka hikina a me ka noiʻi ʻana i ka ʻeke ulana ma kahi, ua kūkākūkā ʻia ke kamaʻilio like ʻana ma kēia pepa.
Ka manawa hoʻouna: Ian-15-2021