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Loaʻa i ka HDPE nā hiʻohiʻona hana maikaʻi o ka ikaika maikaʻi, ka paʻakikī maikaʻi, ka rigidity maikaʻi, a me ka pale ʻana i ka corrosion, ka wai a me ka moisture-proof, ka wela a me ke anuanu, no laila he mau noi koʻikoʻi i ka hoʻoheheʻe ʻana, ka hoʻoheheʻe ʻana a me ka paipu.Me ka hoʻokumuʻiaʻana o nāʻoihanaʻoihana e like me ka plastic ma kahi o ke kila, ka plastic ma kahi o ka lāʻau, HDPE ma keʻano he polyethylene mea hana kiʻekiʻe e hoʻonui i ka paniʻana i nā mea kahiko i ka wā e hiki mai ana.Ma ke ʻano he kumu nui o ka mahiʻai a me ka paʻi kiʻi ʻoniʻoni, ʻoi aku ka liʻiliʻi o LDPE ma mua o LLDPE i ka ikaika mechanical, ka hoʻoulu ʻana i ka wela a me ka hana insulation moisture, a me ka pale ʻana i ka corrosion.No laila, ke ulu wikiwiki nei ka noi mākeke o LLDPE i nā makahiki i hala iho nei, e ʻai mālie ana i kekahi māhele mākeke o LDPE.

1. Polyethylene (PE) kaulahao hana

ʻO ka polyethylene kekahi o nā resins synthetic nui ʻelima, akā ʻo ka nui o ka hana nui o nā resins synthetic home, lawe mai i nā ʻano like ʻole.Ma muli o ka polyethylene i uka o ka ethylene, hoʻokumu ʻia ka hana ma ke ala naphtha, a ua like ka loaʻa kālā.

Ka nui loa downstream palapala noi o polyethylene he kiʻiʻoniʻoni, i helu no ma kahi o 54% o ka huina koi no ka polyethylene ma 2020. Eia kekahi, tubular lako no 12%, puha ipu no 12%, injection molding helu no 11%, a me ka uea. ʻO ke kaha kiʻi i helu ʻia no 4%.

2. Ke kūlana o kēia manawa o ka ʻoihana polyethylene (PE).

I nā makahiki i hala iho nei, ua hoʻonui ʻia ka nui o ka polyethylene o ka ʻāina i kēlā me kēia makahiki.Ma ka 2021, ʻo ka nui o ka hana polyethylene o ka ʻāina ma kahi o 25,746,300 tons, ʻoi aku ka 11.8% makahiki ma ka makahiki.

I ka ʻōlelo o ka hana ʻana, mai ka makahiki 2018, ua hoʻonui mau ʻia ka hana polyethylene o Kina.I ka makahiki 2018, ʻo ka hana polyethylene Kina ma kahi o 16.26 miliona tons, a hiki i 22.72 miliona tons ma 2021, me ka awelika o ka ulu ʻana o ka hui ʻana o 11.8% i ka wā.

Mai ka makahiki 2015 a hiki i ka 2020, ua piʻi mālie ka hoʻohana ʻana o ka polyethylene ma Kina, a i ka makahiki 2021, ua emi iho ka ʻai ʻana o ka polyethylene ma Kina i 37.365,000 tons, kahi emi o 3.2% o ka makahiki.Ma muli o ka hopena o ka maʻi ahulau a me ka mana ʻelua o ka hoʻohana ʻana i ka ikehu, ua hoʻokuʻu a hōʻemi paha kekahi mau hale hana i lalo.Me ka hoʻomaikaʻi ʻana i ka pono ponoʻī, e emi mālie ka hilinaʻi lawe mai o PE.I ka wā e hiki mai ana, me ka hoʻomaikaʻi ʻana o ka maʻi maʻi a me ka ulu mau ʻana o ka hoʻokele waiwai o ka home, e hoʻomau ka koi no ka PE.

Wahi a nā helu kuʻuna, mai Ianuali a Pepeluali 2022, ʻo ka nui o ka lawe ʻana mai o ka polyethylene ma kahi o 2,217,900 tons, 13.46% ka liʻiliʻi ma mua o ka manawa like i ka makahiki i hala.ʻO kā mākou'āina polyethylene e lawe mai i ka nui loa mai Saudi Arabia, ʻo ka nui o ka lawe ʻana mai he 475,900 tons, ʻo 21.46%;ʻO ka lua ʻo Iran, me ka nui o ka lawe ʻia mai o 328,300 tons, he 14.80%;ʻO ke kolu ʻo ka United Arab Emirates, me ka huina o 299,600 tons, helu ʻia no 13.51%.

Ma ke ʻano o nā hoʻokuʻu aku, mai Ianuali a Pepeluali 2022, ua hōʻike ka nui o ka polyethylene import a Kina i ka emi ʻana, aʻo ka hoʻohālikelike ʻana, ua piʻi nui ka hoʻoiho.Ma kahi o 53,100 tons o ka polyethylene i lawe ʻia ma Ianuali-Pepeluali 2022, ʻoi aku ka 29.76% mai ka manawa like i ka makahiki i hala.ʻO ka mea kikoʻī, hoʻopuka ʻo LDPE ma kahi o 22,100 tons, HDPE exports ma kahi o 25,400 tons, a me LLDPE exports ma kahi o 50,600 tons.

3. Nā pilikia ʻenehana o ka ʻoihana polyethylene (PE).

I kēia manawa, ʻo ka hoʻomohala ʻana o ka ʻenehana polyethylene ma Kina i nā pilikia penei:

(1) Ka nele o ka ʻenehana hana polyethylene kiʻekiʻe.Ma Kina, ʻo Fushun Ethylene Chemical wale nō ka mea hoʻohana i ka ʻenehana kaʻina hana Sclairtech e hana i nā huahana copolymerization octene 1, a ʻo Shanghai Jinshan Petrochemical Company wale nō ka Borealis Bostar North Star supercritical polymerization process technology.ʻAʻole i hoʻokomo ʻia ka ʻenehana kaʻina hana solvent insite o Dow Chemical Co., LTD ma Kina.

(2) ʻO ka nele o ka α-olefin copolymerization o ka polyethylene maka kumu a me ka ʻenehana, ua haku ʻo Kina i ka copolymerization o 1-butene a me 1-hexene e hoʻomākaukau ai i ka polyethylene, ma 1-octene, decene, 4-methyl-1-pentene a me ʻAʻole paʻa nā hana ʻoihana α-olefin ʻē aʻe.

(3) ʻO ke kumu kūʻai kiʻekiʻe o nā mea waiwai EVA, liʻiliʻi nā huahana me ka ʻike VA kiʻekiʻe, a me ka hoʻoikaika liʻiliʻi i ka hoʻomohala ʻana i ke kiʻi ʻoniʻoni a me ka hoʻoheheʻe wela wela.