Utshintsho lwexabiso lokungenisa elizweni laseTshayina ukusuka ku-2004-2021 lunokubonwa kwizigaba ezine zendlela yomthamo wokungenisa we-PE waseTshayina ukusukela ngo-2004, njengoko kuchaziwe ngezantsi.

Inqanaba lokuqala ngo-2004-2007, xa imfuno yaseChina yeeplastiki yayiphantsi kwaye umthamo wokungenisa i-PE wagcina umgangatho ophantsi wokusebenza, kunye nomthamo we-PE yokungenisa waseTshayina wawuphantsi ngo-2008 xa ufakelo olutsha lwasekhaya lwalugxininise kakhulu kwaye lufumana ubunzima obukhulu bezemali.

Inqanaba lesibini ngo-2009-2016, ukuthengwa kwe-PE yase-China kungene kwinqanaba lokukhula elizinzileyo emva kokunyuka okuphawulekayo. Ngo-2009, ngenxa yebheyile yemali yangaphakathi neyangaphandle, i-liquidity yehlabathi, umthamo wezorhwebo jikelele wangaphakathi unyukile, imfuno eqikelelwayo yayishushu, ukuthengwa kwempahla kumazwe angaphandle kwanda kakhulu, ngesantya sokukhula se-64.78%, kulandelwa yireform yotshintshiselwano ngo-2010, ireyithi yotshintshiselwano ye-RMB iqhubekile ukuxabisa, idityaniswa ne-ASEAN Free Trade Area Isivumelwano seendleko zokungenisa elizweni sancitshiswa. U-2013 uhleli uphezulu kwaye izinga lokukhula ligcine umkhwa ophezulu. Ngo-2014, umthamo omtsha wemveliso ye-PE yasekhaya uye wanda kakhulu, kwaye imveliso yasekhaya yenjongo jikelele yanda ngokukhawuleza; in 2016, i-West ngokusesikweni waphakamisa izohlwayo Iran, kunye nemithombo Iranian babezimisele ngakumbi ukuthumela eYurophu kunye namaxabiso aphezulu, ngelo xesha ukukhula umthamo yokungenisa yasekhaya lehla umva.

Inqanaba lesithathu yi-2017-2020, umthamo wokungenisa we-PE waseTshayina wavuka ngokukhawuleza kwakhona ngo-2017, amandla okuvelisa i-PE yasekhaya nakwamanye amazwe ayanda kwaye agxininise ngakumbi imveliso yaphesheya kwezilwandle, i-China, njengelizwe elikhulu lokutya i-PE, isekho i-export ebalulekileyo yokukhululwa kwamandla emveliso yehlabathi. I-2017 ukususela kwi-slope ye-PE yokungenisa umthamo we-PE yokungenisa i-China iye yanda kakhulu, ukuya ku-2020, ukulungiswa kwe-hydrocarbon enkulu kunye nokukhanya kwezixhobo ezintsha ze-hydrocarbon ziye zaqaliswa, zasekhaya Nangona kunjalo, ngokwembono yokusetyenziswa, imfuno yaphesheya ichaphazeleka kakhulu "yindyikityha yesithsaba esitsha", ngelixa imeko yobhubhane lwaseTshayina luthintelo kunye nolawulo oluthe kratya. ukubonelela kwimarike yaseTshayina ngamaxabiso aphantsi, ngoko ke umthamo wokungenisa we-PE waseTshayina ugcina ukukhula okuphakathi ukuya phezulu, kwaye ngo-2020 umthamo wokungenisa we-PE waseTshayina ufikelela kwi-18.53 yezigidi zeetoni. Nangona kunjalo, izinto eziqhuba ukunyusa umthamo we-PE wokungenisa kweli nqanaba ubukhulu becala zezokusetyenziswa kwempahla endaweni yokuqhutywa yimfuno ekhawulezileyo, kunye noxinzelelo lokukhuphisana oluvela kwiimarike zasekhaya kunye naphesheya kancinci kancinci.

Ngo-2021, indlela yaseTshayina yokungenisa i-PE ingena kwisigaba esitsha, kwaye ngokweenkcukacha-manani zesiko, umthamo wokungenisa we-PE waseTshayina uya kuba malunga ne-14.59 yezigidi zeetoni ngo-2021, phantsi kwe-3.93 yezigidi zeetoni okanye i-21.29% ukususela ngo-2020. ixabiso inverse polyethylene ngaphakathi nangaphandle kwimarike, umthamo yokungenisa PE yasekhaya iya kuncitshiswa kakhulu ngo-2021. 2022 amandla emveliso China iya kuqhubeka ukwandisa, i window arbitrage ngaphakathi nangaphandle kwimarike kusenzima ukuvula, umthamo wokungenisa PE ngamazwe uya kuhlala ephantsi, kwaye umthamo wokungenisa PE China angangena kwitshaneli ehlayo kwixesha elizayo.

Ukususela kwi-2004-2021 i-China PE umthamo wokuthumela ngaphandle kweentlobo nganye, umthamo wokungenisa jikelele we-China PE uphantsi kwaye i-amplitude inkulu.

Ukusukela ngo-2004 ukuya ku-2008, umthamo wokuthumela ngaphandle kwe-PE yaseTshayina wawuphakathi kweetoni ezili-100,000. Emva kweyeSilimela ka-2009, izinga lesaphulelo serhafu yelizwe kwezinye iiplastiki kunye neemveliso zazo, ezifana nezinye iipholima ze-ethylene ezimile okweprayimari, zanyuswa zaya kutsho kwi-13%, kwaye umdla wangaphakathi we-PE wokuthumela ngaphandle unyukile.

Ngo-2010-2011, ukunyuka kwe-PE yasekhaya kwakubonakala ngokucacileyo, kodwa emva koko, i-PE yangaphakathi iphinde yadibana ne-bottleneck kwakhona, nangona ukunyuka kwemveliso ye-PE yasekhaya, kusekho i-gap enkulu kwi-China PE unikezelo, kwaye kunzima ukuba nokwanda okukhulu kokuthumela ngaphandle ngokusekelwe kwiindleko, imfuno yomgangatho kunye nemiqobo yemeko yokuthutha.

Ukusukela ngo-2011 ukuya kowama-2020, umthamo wokuthumela ngaphandle kwe-PE yaseTshayina uye wacutheka kancinci, kwaye umthamo wokuthumela ngaphandle wawuphakathi kwe-200,000-300,000 yeetoni. Ngo-2021, umthamo wokuthumela ngaphandle we-PE waseTshayina uye wanda, kwaye inani lokuthunyelwa kwempahla ngaphandle konyaka lilonke lafikelela kwiitoni ezingama-510,000, ukwanda kweetoni ezingama-260,000 xa kuthelekiswa no-2020, ukonyuka kwe-104% unyaka nonyaka.

Isizathu kukuba emva kwe-2020, izityalo ezinkulu zaseChina zokusulungekiswa kunye nokukhanya kwe-hydrocarbon ziya kuqaliswa kwindawo ephakathi, kwaye umthamo wemveliso uya kukhutshwa ngokufanelekileyo kwi-2021, kwaye imveliso ye-PE yaseChina iya kwanda, ngakumbi iintlobo ze-HDPE, kunye nezibonelelo ezininzi ezicwangcisiweyo kwizityalo ezitsha kunye nokwanda koxinzelelo lokhuphiswano lwemarike. Unikezelo luqiniswa, kwaye ukuthengiswa kwezixhobo ze-PE zaseTshayina eMzantsi Melika nakwezinye iindawo kuyanda.

Ukukhula okuqhubekayo komthamo wemveliso yingxaki enzima ekufuneka ijongane nayo kwicala lokubonelela nge-PE yaseTshayina. Okwangoku, ngenxa yeengxaki zeendleko, imfuno yomgangatho kunye neemeko zokuhamba, kusenzima ukuthumela ngaphandle kwe-PE yasekhaya, kodwa ngokukhula okuqhubekayo komthamo wemveliso yasekhaya, kubalulekile ukuzama ukuthengisa phesheya. Uxinzelelo lokhuphiswano lwehlabathi lwe-PE kwixesha elizayo luya lusiba qatha ngakumbi, kwaye ipateni yobonelelo kunye nemfuno kwiimarike zasekhaya nezangaphandle isafuna ukuqwalaselwa ngakumbi.