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I-HDPE ineempawu ezibalaseleyo zokusebenza zamandla alungileyo, ukuqina okuhle, ukuqina okuhle, kunye nokumelana nokugqwala, ukungangeni kwamanzi kunye nobungqina bokufuma, ubushushu kunye nokumelana nokubanda, ngenxa yoko inezicelo ezibalulekileyo ekubumbeni ukuvuthela, ukubumba inaliti kunye nombhobho.Ngokuqulunqwa kweendlela zoshishino ezifana neplastiki endaweni yentsimbi, iplastiki esikhundleni somthi, i-HDPE njengento ephezulu yokusebenza kwe-polyethylene iya kukhawulezisa ukutshintshwa kwezinto zemveli kwixesha elizayo.Njengeyona nto iphambili yefilimu yezolimo kunye nokupakishwa, i-LDPE ingaphantsi kwe-LLDPE kumandla omatshini, ukugquma ubushushu kunye nokusebenza kokufakwa komswakama, kunye nokumelana nokubola.Ke ngoko, imfuno yentengiso ye-LLDPE ikhule ngokukhawuleza kwiminyaka yakutshanje, ngokuthe ngcembe iginya isabelo semakethi se-LDPE.

1. Polyethylene (PE) ishishini chain

I-Polyethylene yenye yezona zintlanu zinkulu zokwenziwa kweereyini, kodwa ikwayeyona mveliso inkulu yeereyini zokwenziwa zasekhaya, ingenisa ezona ntlobo zininzi.Ngenxa yokuba i-polyethylene iphezulu ye-ethylene, imveliso isekelwe ikakhulu kwindlela ye-naphtha, kwaye inzuzo iyafana.

Esona sicelo sikhulu esisezantsi se-polyethylene yifilimu, eyenze malunga ne-54% yemfuno iyonke ye-polyethylene ngo-2020. Ukongeza, izixhobo ze-tubular zibalelwa kwi-12%, izitya ezingenanto zibalwa kwi-12%, ukubunjwa kwenaliti kubalelwa kwi-11%, kunye nocingo. umzobo ubalelwa kwi-4%.

2. Imeko yangoku yoshishino lwepolyethylene (PE).

Kwiminyaka yakutshanje, umthamo welizwe we-polyethylene uye wanda unyaka nonyaka.Ngo-2021, amandla okuvelisa i-polyethylene yelizwe malunga neetoni ezingama-25,746,300, ukunyuka kwe-11.8% ngonyaka.

Ngokubhekiselele kwimveliso, ukususela ngo-2018, imveliso ye-polyethylene yaseChina iye yanda ngokuthe ngcembe.Ngo-2018, imveliso ye-polyethylene yaseTshayina yayimalunga ne-16.26 yezigidi zeetoni, kwaye yafikelela kwi-22.72 yezigidi zeetoni ngo-2021, kunye nesantya sokukhula komndilili wonyaka we-11.8% ngeli xesha.

Ukususela ngo-2015 ukuya ku-2020, ukusetyenziswa okubonakalayo kwe-polyethylene e-China kwanda ngokuthe ngcembe, kwaye ngo-2021, ukusetyenziswa okubonakalayo kwe-polyethylene e-China kwehle ukuya kwiitoni ezingama-37.365,000, ukuhla kwe-3.2% ngonyaka.Ikakhulu ngenxa yempembelelo yobhubhane kunye nolawulo olubini lokusetyenziswa kwamandla, ezinye iifektri ezisezantsi ziye zanqumamisa okanye zanciphisa imveliso.Ngokuphuculwa kokuzimela, ukuxhomekeka kokungenisa kwe-PE kuya kuncipha ngokuthe ngcembe.Kwixesha elizayo, ngokuphuculwa kobhubhane kunye nokukhula okuzinzileyo koqoqosho lwasekhaya, imfuno ye-PE iya kuqhubeka ikhula.

Ngokwezibalo zamasiko, ukususela ngoJanuwari ukuya kuFebruwari 2022, ukungeniswa okupheleleyo kwe-polyethylene malunga neetoni ze-2,217,900, i-13.46% ngaphantsi kwexesha elifanayo kunyaka odlulileyo.Ilizwe lethu ipolyethylene ingenisa elona nani likhulu lisuka eSaudi Arabia, inani elipheleleyo lokungeniswa lilonke liyi-475,900 yeetoni, ezibalelwa kwi-21.46%;Okwesibini yi-Iran, kunye nenani elipheleleyo le-328,300 yeetoni, ezibalelwa kwi-14.80%;Eyesithathu yi-United Arab Emirates, enexabiso leetoni ezingama-299,600, ezibalelwa kwi-13.51%.

Ngokuphathelele ukuthunyelwa kwamanye amazwe, ukususela ngoJanuwari ukuya kuFebruwari 2022, umthamo wokungenisa i-polyethylene waseChina ubonise ukwehla, ngelixa ngokuphambene kakhulu, ukuthunyelwa kwamanye amazwe kunyuke ngokukhawuleza.Malunga ne-53,100 yeetoni ze-polyethylene zathunyelwa ngaphandle ngoJanuwari-Februwari 2022, i-29.76% ukusuka kwixesha elifanayo kunyaka ophelileyo.Ngokukodwa, i-LDPE ithumela ngaphandle malunga neetoni ezingama-22,100, i-HDPE ithumela ngaphandle malunga neetoni ezingama-25,400, kwaye i-LLDPE ithumela ngaphandle malunga neetoni ezingama-50,600.

3. Iingxaki zobuchwepheshe ze-polyethylene (PE) ishishini

Okwangoku, uphuhliso lweteknoloji ye-polyethylene e-China ineengxaki ezilandelayo:

(1) Ukunqongophala kweteknoloji yokuvelisa i-polyethylene ephezulu.E-China, kuphela isityalo se-Fushun Ethylene Chemical sisebenzisa iteknoloji yenkqubo yeSclairtech ukuvelisa i-octene 1 yeemveliso ze-copolymerization, kwaye yi-Shanghai Jinshan Petrochemical Company kuphela ene-Borealis Bostar North Star supercritical process polymerization process.Itekhnoloji yenkqubo ye-solvent yangaphakathi yeDow Chemical Co., LTD ayizange ifakwe eChina.

(2) Ukungabikho kwe-alpha-olefin ephuculweyo ye-polyethylene yezinto eziluhlaza kunye nobuchwepheshe, i-China ikwazi kakuhle i-copolymerization ye-1-butene kunye ne-1-hexene ukulungiselela i-polyethylene, kwi-1-octene, i-decene, i-4-methyl-1-pentene kunye enye imveliso yemizi-mveliso ye-α-olefin ehambele phambili ayikabi nanto.

(3) Iindleko eziphezulu zokuvelisa izinto eziluhlaza ze-EVA, iimveliso ezimbalwa ezinomxholo ophezulu we-VA, kunye nomzamo omncinci ekuphuhliseni ifilimu esebenzayo kunye ne-adhesive hot melt.