Ib nyuag keeb kwm ntawm kev loj hlob ntawm high-density polyethylene

Lub xyoo pua no tau pom kev hloov pauv hloov pauv hauv cov kav dej, uas yog "hloov hlau nrog yas." Nrog rau kev nce qib sai ntawm cov khoom siv polymer science thiab thev naus laus zis, kev sib sib zog nqus ntawm kev txhim kho thiab kev siv cov kav dej yas, thiab kev txhim kho txuas ntxiv ntawm cov txheej txheem ntau lawm, cov kav dej yas tau pom tseeb tias lawv ua tau zoo heev. Niaj hnub no, cov kav dej yas tsis raug yuam ua "pheej yig hloov" rau cov kav hlau. Hauv qhov kev hloov pauv no, cov kav dej polyethylene tau nyiam thiab nce dazzling. Lawv tau siv dav hauv kev thauj mus los roj, dej, dej phwj tuaj, dej ua liaj ua teb, kev thauj mus los zoo hauv cov mines, nrog rau cov roj av, tshuaj lom neeg kev lag luam, xa ntawv thiab kev sib txuas lus thiab lwm yam kev lag luam, tshwj xeeb tshaj yog nyob rau hauv cov teb xws li nws yog dav siv nyob rau hauv kev lag luam chemical. gas tsheb thauj mus los.
HDPE yog cov thermoplastic polyolefin ua los ntawm copolymerization ntawm ethylene. Txawm hais tias HDPE tau tshaj tawm hauv xyoo 1956, cov yas no tseem tsis tau txog kev loj hlob. Cov khoom siv ntau yam no txuas ntxiv txhim kho kev siv tshiab thiab kev lag luam.
kuv lub teb chaws cov tuam txhab tsim khoom ntawm high-density polyethylene (cov high-density polyethylene ntawm no tsis suav nrog high-density polyethylene uas ua los ntawm cov khoom siv ntom ntom polyethylene) suav nrog PetroChina, Sinopec, thiab CNOOC. Raws li qhov kawg ntawm 2006, cov high-density polyethylene belongs rau PetroChina Muaj 4 pawg ntawm polyethylene nroj tsuag, namely Lanzhou Petrochemical high-density polyethylene cog, Daqing Petrochemical high-density polyethylene cog, Liaoyang Petrochemical high-density polyethylene cog, thiab Jilin Petrochemical high-density polyethylene cog.
High-density polyethylene feem ntau yog tsim los ntawm Ziegler-Natta polymerization txoj kev. Nws yog tus cwj pwm los ntawm qhov tseeb tias tsis muaj cov ceg ntoo ntawm cov saw hlau molecular, yog li cov saw hlau molecular tsis tu ncua thiab muaj qhov ntom ntom ntom ntom. Cov txheej txheem no siv ethylene los ua cov khoom siv raw hauv tubular lossis lub raj xa hluav taws xob qis, thiab siv cov pa oxygen lossis organic peroxide ua tus thawj coj los pib cov tshuaj tiv thaiv polymerization.
High-density vinyl yog ib qho khoom siv zoo ib puag ncig uas tuaj yeem siv dua thiab rov siv dua thaum rhuab mus rau nws qhov melting point. Nws yuav tsum raug sau tseg tias cov khoom siv yas tuaj yeem muab faib ua ob pawg: "Thermoplastic" thiab "Thermosetting yas". "Thermosetting yas" dhau los ua lub xeev ruaj khov tom qab tau rhuab mus rau qhov kub thiab txias, thiab nws lub xeev tsis tuaj yeem hloov tau txawm tias nws txuas ntxiv mus. Yog li ntawd, cov khoom uas muaj teeb meem ib puag ncig yog "thermosetting yas" cov khoom (xws li log tsheb), tsis yog "thermoplastic yas" cov khoom (xws li yas pallets Lus Cim: pallets hu ua "plywood" hauv Hong Kong thiab Macao), yog li tsis yog txhua yam "" yas. "tsis yog ib puag ncig tus phooj ywg.