Iinkalo zobugcisa zokutshiza i-polyurethane field foam eqinileyo
Izinto zokugquma ze-polyurethane (PU) ezine-foam foam eqinileyo yi-polymer eneyunithi yesakhiwo esiphindaphindayo se-carbamate segment, eyenziwe yi-reaction ye-isocyanate kunye ne-polyol. Ngenxa yokugquma kwayo okugqwesileyo kobushushu kunye nokusebenza kwayo okungangeni manzi, isetyenziswa ngokubanzi kwi-insulation yangaphandle yodonga kunye nophahla, kunye nakwindawo yokugcina izinto ezibandayo, kwiindawo zokugcina iinkozo, kumagumbi okugcina izinto, kwiipayipi, kwiingcango, kwiifestile nakwezinye iindawo ezikhethekileyo ze-insulation yobushushu.
Okwangoku, ngaphandle kokusetyenziswa kokukhusela uphahla kunye nokuthintela amanzi, ikwasebenza ngeenjongo ezahlukeneyo ezifana neendawo zokugcina izinto ezibandayo kunye nokufakelwa kweekhemikhali ezinkulu ukuya kweziphakathi.
Itekhnoloji ephambili yokwakha isitshizi se-polyurethane esiqinileyo
Ubuchule bokusebenzisa itekhnoloji yokutshiza nge-polyurethane ene-foam eqinileyo buzisa imingeni ngenxa yeengxaki ezinokubakho ezifana nemingxunya ye-foam engalinganiyo. Kubalulekile ukuphucula uqeqesho lwabasebenzi bokwakha ukuze bakwazi ukusingatha ubuchule bokutshiza ngobuchule kwaye basombulule iingxaki zobugcisa ezidibene nabo ngexesha lokwakha. Imingeni ephambili yobugcisa ekwakhiweni kokutshiza igxile kakhulu kwezi zinto zilandelayo:
Ulawulo lwexesha lokwenza mhlophe kunye nesiphumo se-atomization.
Ukwenziwa kwe-polyurethane foam kubandakanya amanqanaba amabini: ukwenziwa kwe-foam kunye nokunyanga.
Ukususela kwinqanaba lokuxuba de kube kuphele ukwanda komthamo wefoam - le nkqubo yaziwa ngokuba yi-foam. Ngeli nqanaba, ukufana kokusasazwa kwemingxunya yebhamuza kufuneka kuqwalaselwe xa inani elikhulu le-ester eshushu esebenzayo likhutshwa kwinkqubo ngexesha lokusebenza kokutshiza. Ukufana kwebhamuza kuxhomekeke kakhulu kwizinto ezifana nezi:
1. Ukuphambuka komlinganiselo wezinto ezibonakalayo
Kukho umahluko omkhulu woxinano phakathi kwamaqamza enziwe ngomatshini xa kuthelekiswa nalawo enziwe ngesandla. Ngokwesiqhelo, umlinganiselo wezinto ezilungisiweyo ngomatshini yi-1:1; nangona kunjalo ngenxa yamanqanaba ahlukeneyo e-viscosity phakathi kwezinto ezimhlophe zabavelisi abahlukeneyo - umlinganiselo wezinto ezibonakalayo usenokungahambelani nala manqanaba azinzileyo akhokelela kumahluko kuxinano lwe-foam ngokusekelwe ekusetyenzisweni okugqithisileyo kwezinto ezimhlophe okanye ezimnyama.
2. Ubushushu obuphakathi
Iifoam zepolyurethane zinobuthathaka kakhulu kutshintsho lobushushu; inkqubo yazo yokufutha ixhomekeke kakhulu ekufumanekeni kobushushu obuvela kwiimpendulo zeekhemikhali ngaphakathi kwenkqubo ngokwayo kunye nezibonelelo zokusingqongileyo.
Xa amaqondo obushushu aphakathi ephakame ngokwaneleyo ukuze kubonelelwe ngobushushu obungqongileyo - ikhawulezisa isantya sokusabela nto leyo ekhokelela ekubeni kubekho amagwebu akhuliswe ngokupheleleyo anobunzima obuhambelanayo ukusuka kumphezulu ukuya kumbindi.
Ngokwahlukileyo koko, kumaqondo obushushu aphantsi (umz., ngaphantsi kwe-18°C), ubushushu obuthile bokusabela buyanyamalala bungene kwindawo engqongileyo nto leyo ebangela amaxesha okunyibilika ahlala ixesha elide kunye namazinga okunyuka kokuncipha kokubumba ngaloo ndlela kunyusa iindleko zemveliso.
3.Umoya
Ngexesha lokusebenza kokutshiza, isantya somoya kufuneka sihlale singaphantsi kwe-5m/s; ukudlula lo mda kuphephethe ubushushu obuveliswa yimpendulo obuchaphazela ukugqwala ngokukhawuleza ngelixa kusenza umphezulu wemveliso ube buthathaka.
4. Ubushushu obuphantsi kunye nokufuma
Amaqondo obushushu odonga olusisiseko achaphazela kakhulu ukusebenza kakuhle kwe-polyurethane xa kusenziwa iinkqubo zokufaka i-foam ingakumbi ukuba amaqondo obushushu odonga olusezantsi kunye nolusezantsi aphantsi - ukufunxwa ngokukhawuleza kwenzeka emva kokugqunywa kokuqala okunciphisa isivuno sezinto ezisetyenzisiweyo.
Ngoko ke ukunciphisa amaxesha okuphumla emini ngexesha lokwakha kunye namalungiselelo esicwangciso esicwangcisiweyo kubalulekile ukuqinisekisa amazinga aphezulu okwandiswa kwe-polyurethane ye-foam eqinileyo.
I-Rigid Polyurethane Foam imele imveliso ye-polymer eyenziwe ngee-reactions phakathi kwezinto ezimbini - i-Isocyanate kunye ne-Combined Polyether.
Izinto ze-Isocyanate zisabela ngokukhawuleza kwiibhondi ze-urea ezivelisa amanzi; ukwanda komxholo webhondi ye-urea kwenza amagwebu abe buthathaka ngelixa kunciphisa ukunamathelana phakathi kwazo kunye nee-substrates, nto leyo ebangela ukuba iindawo ze-substrate ezomileyo nezicocekileyo ezingenamhlwa/uthuli/ukufuma/ungcoliseko, ingakumbi ukuthintela iintsuku zemvula apho umbethe/iqabaka kufuneka zisuswe kulandele ukomiswa ngaphambi kokuba kuqhubeke phambili.
Ixesha leposi: Julayi-16-2024