nkhani

HDPE ili ndi magwiridwe antchito abwino kwambiri amphamvu yabwino, kulimba kwabwino, kukhazikika bwino, komanso kukana dzimbiri, kusalowa madzi ndi chinyezi, kukana kutentha ndi kuzizira, chifukwa chake imakhala ndi ntchito zofunika pakuwomba, kuumba jekeseni ndi chitoliro.Ndi mapangidwe azinthu zamakampani monga pulasitiki m'malo mwa chitsulo, pulasitiki m'malo mwa matabwa, HDPE ngati chinthu chapamwamba cha polyethylene chidzafulumizitsa m'malo mwa zinthu zachikhalidwe m'tsogolomu.Monga chuma chachikulu cha filimu yaulimi ndi ma CD, LDPE ndiyotsika ku LLDPE mu mphamvu zamakina, kutchinjiriza kutentha ndi ntchito yotchinjiriza chinyezi, komanso kukana dzimbiri.Chifukwa chake, kufunikira kwa msika wa LLDPE kwakhala kukukulirakulira m'zaka zaposachedwa, pang'onopang'ono kumeza gawo lina lamsika la LDPE.

1. Polyethylene (PE) makampani unyolo

Polyethylene ndi imodzi mwazinthu zazikulu zisanu zopangira utomoni, komanso mphamvu yayikulu kwambiri yopangira utomoni wapanyumba, imatumiza mitundu yambiri kunja.Chifukwa polyethylene ili pamwamba pa ethylene, kupanga kumachokera ku njira ya naphtha, ndipo phindu ndilofanana.

Ntchito yayikulu kwambiri yakumunsi ya polyethylene ndi filimu, yomwe idapanga pafupifupi 54% ya kuchuluka kwa polyethylene mu 2020. Kuphatikiza apo, zida za tubular zidatenga 12%, zotengera zopanda kanthu zimawerengera 12%, jekeseni wopangira jekeseni ndi 11%, ndi waya. kujambula kunali 4%.

2. Mkhalidwe wamakono wa mafakitale a polyethylene (PE).

M'zaka zaposachedwa, mphamvu yopanga polyethylene mdziko muno yakula chaka ndi chaka.Pofika 2021, mphamvu yopanga polyethylene mdziko muno ndi pafupifupi matani 25,746,300, kukwera ndi 11.8% chaka chilichonse.

Pankhani ya kupanga, kuyambira 2018, kupanga polyethylene yaku China kwachulukirachulukira.Mu 2018, China yopanga polyethylene inali pafupifupi matani 16.26 miliyoni, ndipo idafika matani 22.72 miliyoni mu 2021, ndikukula kwapakati pachaka kwa 11.8% panthawiyo.

Kuchokera 2015 mpaka 2020, kumwa zikuoneka polyethylene ku China pang'onopang'ono chinawonjezeka, ndipo mu 2021, mowa zikuoneka polyethylene ku China utachepa kwa matani 37.365,000, kuchepa kwa 3.2% chaka ndi chaka.Makamaka chifukwa cha kukhudzidwa kwa mliriwu komanso kuwongolera kuwiri kwa mphamvu zamagetsi, mafakitale ena akumunsi atayimitsa kapena kuchepetsa kupanga.Ndi kusintha kwa kudzidalira, kudalira kwa kunja kwa PE kudzachepa pang'onopang'ono.M'tsogolomu, ndikuwongolera kwa mliri komanso kukula kwachuma chapakhomo, kufunikira kwa PE kudzapitilira kukula.

Malinga ndi ziwerengero zamilandu, kuyambira Januware mpaka February 2022, kuchuluka kwa polyethylene kunali pafupifupi matani 2,217,900, 13.46% kuchepera nthawi yomweyi chaka chatha.Dziko lathu la polyethylene limatulutsa kuchuluka kwakukulu kuchokera ku Saudi Arabia, ndalama zonse zomwe zimatumizidwa ndi matani 475,900, zomwe zimawerengera 21.46%;Yachiwiri ndi Iran, yomwe ili ndi matani 328,300, omwe amawerengera 14.80%;Yachitatu ndi United Arab Emirates, yomwe ili ndi matani 299,600, omwe amawerengera 13.51%.

Pankhani ya zotumiza kunja, kuyambira Januware mpaka February 2022, kuchuluka kwa polyethylene ku China kudatsika, pomwe mosiyana kwambiri, kutumiza kunja kudakwera kwambiri.Pafupifupi matani 53,100 a polyethylene adatumizidwa kunja mu Januware-February 2022, mpaka 29.76% kuchokera nthawi yomweyi chaka chatha.Makamaka, LDPE imatumiza kunja pafupifupi matani 22,100, HDPE imatumiza kunja pafupifupi matani 25,400, ndipo LLDPE imatumiza kunja pafupifupi matani 50,600.

3. Mavuto aukadaulo amakampani a polyethylene (PE).

Pakalipano, chitukuko cha teknoloji ya polyethylene ku China chili ndi mavuto awa:

(1) Kupanda ukadaulo wapamwamba wopanga polyethylene.Ku China, chomera chokha cha Fushun Ethylene Chemical chimagwiritsa ntchito ukadaulo wa Sclairtech kupanga zinthu za octene 1 copolymerization, ndipo kampani ya Shanghai Jinshan Petrochemical yokha ndiyomwe ili ndi ukadaulo wa Borealis Bostar North Star wotsogola kwambiri wa polymerization.Ukadaulo wosungunulira wamkati wa Dow Chemical Co., LTD sunayambitsidwe ku China.

(2) Kuperewera kwapamwamba kwa α-olefin copolymerization ya polyethylene zopangira ndi ukadaulo, China yadziwa copolymerization ya 1-butene ndi 1-hexene kukonzekera polyethylene, mu 1-octene, decene, 4-methyl-1-pentene ndi zina zapamwamba zamakampani a α-olefin zikadalibe.

(3) Mtengo wapamwamba wopangira zida za EVA, zopangira zochepa zomwe zili ndi VA yayikulu, komanso kuyesetsa pang'ono pakupanga filimu yogwira ntchito ndi zomatira zotentha zosungunuka.