PET ndi chiyani? -Kusanthula Kwambiri kwa Polyethylene Terephthalate
PET, kapena Polyethylene Terephthalate, ndi zinthu za polima zomwe zimagwiritsidwa ntchito kwambiri pamakampani opanga mankhwala. M'nkhaniyi, tidzakambirana mwatsatanetsatane tanthauzo la PET, madera ogwiritsira ntchito, ndondomeko yopangira ndi ubwino wake, kuti apereke owerenga kumvetsetsa bwino kwa PET ngati chinthu chofunikira.
Tanthauzo ndi Makhalidwe Ofunika a PET
PET ndi chiyani? Mankhwala, PET ndi polima ya thermoplastic yomwe imapangidwa ndi polymerization ya terephthalic acid ndi ethylene glycol.Mapangidwe a mankhwala a PET amapereka zinthu zabwino kwambiri zamakina monga mphamvu yapamwamba, kukana kutentha ndi kuwonekera bwino. Izi zimapangitsa PET kukhala chinthu chosankhidwa muzochitika zambiri zogwiritsira ntchito, makamaka m'gawo lazonyamula.
Malo ogwiritsira ntchito kwambiri a PET
PET imagwiritsidwa ntchito pazinthu zosiyanasiyana, kuyang'ana mbali ziwiri zazikulu: zida zonyamula ndi kupanga fiber. M'makampani onyamula katundu, PET imagwiritsidwa ntchito kwambiri popanga zinthu monga mabotolo apulasitiki, zotengera zakudya ndi mafilimu, pomwe kuwonekera kwake komanso zinthu zabwino zotchingira mpweya zimatsimikizira kuti chakudya chomwe chili mkati mwa phukusi chimakhala chatsopano.PET imagwiritsidwanso ntchito ngati ulusi wopangira, womwe umagwiritsidwa ntchito kwambiri pamakampani opanga nsalu, makamaka popanga ulusi wa polyester. Zovala zopangidwa ndi ulusi wa poliyesitala zimakhala zolimba, zosavuta kuzichapa komanso zowuma mwachangu, zomwe zimapangitsa kuti zikhale zoyenera kuvala tsiku ndi tsiku.
Njira yopanga PET
Kumvetsetsa zomwe PET ili kumafunanso kuyang'ana mozama pakupanga kwake, komwe kumachitika m'njira ziwiri zazikulu: sitepe imodzi (esterification mwachindunji) ndi masitepe awiri (ester exchange). Mu njira imodzi, terephthalic acid imakhudzidwa mwachindunji ndi ethylene glycol pa kutentha kwakukulu ndi kukakamizidwa kuti apange PET, pamene muzitsulo ziwiri, ethylene glycol esters amapangidwa poyamba, ndiyeno polycondensation ikuchitika kuti ipange PET. kuti akonze mankhwala owumbidwa.
Ubwino ndi Kukhazikika kwa PET
PET ndi chiyani? Kuchokera pamalingaliro okhazikika, zabwino za PET zimakhala pakubwezeredwa kwabwino; Zogulitsa za PET zitha kubwezeretsedwanso kudzera pa pyrolysis, kubwezeretsanso mankhwala ndi njira zina zochepetsera kuipitsidwa kwa chilengedwe, ndipo mphamvu zambiri za PET komanso zopepuka zimapatsanso mwayi pakuchepetsa kugwiritsa ntchito zinthu komanso ndalama zoyendera. Izi zimapangitsa PET kukhala imodzi mwazinthu zobiriwira zofunika kwambiri pamakampani amakono.
Mapeto
Mwachidule, PET ndi chiyani? Ndizinthu zamtundu wa polima zomwe zimakhala ndi ntchito zambiri.PET imakhala ndi gawo lofunika kwambiri pamakampani amakono chifukwa cha physicochemical properties, ntchito zambirimbiri komanso kubwezeretsanso bwino. Kaya ndikuyika zinthu m'moyo watsiku ndi tsiku kapena kupanga ulusi pamakampani opanga nsalu, kukopa kwa PET kuli paliponse. Choncho, kumvetsetsa mozama zomwe PET ndi kofunika kuti mumvetsetse momwe zinthu zamakono zamakono zimayendera.