Iyoindasitiri yepolyurethaneinoita basa guru mumabasa akawanda, akadai sekuvaka, mota uye insulation. Mafuro ePolyurethane (PU) anoshandiswa mukushandiswa kwakadai se insulation, fenicha uye kurongedza kuti kuvandudza mashandiro esimba uye nyaradzo yehupenyu hwemazuva ano. Zvisinei, maitiro ekugadzira e polyurethane foam yechinyakare ave kuongororwa nekuda kwekukanganisa kwayo nharaunda, kunyanya kushandiswa kwe hydrofluorocarbon (HFC) blowing agents. Iye zvino hydrofluoroolefin (HFO) blowing agents seimwe nzira yemazuva ano panzvimbo peHFC inopa sarudzo ine hushamwari kune nharaunda inoderedza kukanganisa kwemaitiro ekugadzira polyurethane foam.
Basa reMafuta Anopfuta Mukugadzirwa kwePolyurethane
Zvinhu zvinofefetera zvinoumba maumbirwo emasero anopa zvinhu izvi huremu, hunodzivirira kupisa uye hunhu hwekuchengetedza kupisa. Zvinhu izvi zvinowanzova zvinhu zvinofefetera zvinokura kana zvichipiswa kana kuti zvichikonzerwa nemakemikari, zvichiita kuti polyurethane iite furo.
Kare, HFCS ndiyo yagara ichishandiswa zvakanyanya pakuputira. Yakatsiva early freon (CFCS). Zvisinei, HFCS ine dambudziko rayo: ine mukana wepamusoro wekudziya kwepasi rose (GWP). Kana ikaburitswa mumhepo, inobata kupisa zviri nani kupfuura kabhoni dhayokisaidhi, zvichiita kuti pave nekukanganisa kukuru pakuchinja kwemamiriro ekunze.
Kuchinja Kuenda Kuma "HFO Blowing Agents"
Mukupindura kunetseka kuri kuramba kuchiwedzera kwezvakatipoteredza, vagadziri vari kuwedzera kushandisa HFO (hydrofluoroolefin) blowing agents. Izvi blowing agents zvinomiririra chizvarwa chitsva chemakemikari ane GWP yakaderera uye asingabatsire mukuderedza ozone.
Kukwanisa Kudziyisa Kwepasi Rese Kuderera:MaHFO, akadai seHFO-1233zd(E) uye HFO-1336mzz(Z), ane maGWP ari pasi pe1, zvichienzaniswa nemaHFC akaita seHFC-245fa, ane GWP inosvika 1,030. Kudzikira kukuru kweGWP uku kunobatsira kuderedza kukanganiswa kwekugadzirwa kwefuro pakudziya kwepasi rose.
Kusagona Kupera kweOzone:Kusiyana neCFCs neHCFCs, maHFOs haakuvadzi ozone layer, zvichiita kuti mitemo yepasi rose yakaita seMontreal Protocol itevedzwe.
Kushanda Nesimba Kwakavandudzwa:Mafuro epolyurethane akagadzirwa nemafuta anoputira eHFO anowanzo ratidza hunhu hwakanaka hwekuputira, zvichibatsira mukushanda nesimba kwakanyanya muzvivako. Izvi zvinoderedza mitengo yekupisa nekutonhodza, zvichideredzawo kabhoni inokonzerwa nekushandiswa kwesimba.
Hazvibatike:MaHFO mazhinji haabati kana kuti haabati, zvichiita kuti agare akachengeteka munzvimbo dzekugadzira kana tichienzanisa nedzimwe nzira dzakadai sehydrocarbons.
Kutevedzera Mutemo:Nyika pasi rose dziri kusimbisa mitemo pamusoro pemagetsi anokonzera kupisa kwakanyanya kweGWP. European Union, pasi pemutemo wayo weF-Gas, neUnited States, nezvirongwa zvakaita seAIM Act, vari kubvisa kushandiswa kweHFCs vachisarudza dzimwe nzira dzinogara kwenguva refu, kusanganisira HFOs.
Mhedziso: Danho Rekuenda Kuramangwana Rakachena
Iyoindasitiri yepolyurethaneiri kuchinja zvikuru nekuda kwekudzikisa kukanganisa kwayo nharaunda. Kuunzwa kwezvishandiso zvekufuridza zveHFO kunoratidza danho rakakosha mukuita uku, zvichipa mhinduro inogara kwenguva refu kune dzimwe nzira dzechinyakare dzeGWP dzakadai seHFCS. Nekushandisa HFO, indasitiri iyi inogona kubatsira kuderedza kukanganisa kwezvinhu zvepakutanga zvakaita sekuputira, kugadzira nzira yezvivakwa zvakasvibira uye zvinoshandisa simba shoma.
Nguva yekutumira: Zvita-16-2024