Ulwazi Oluyisisekelo Lwe-Spray Foam

I-spray foam iyinto yokuvikela eguquguqukayo edalwe ngokusabela kwamakhemikhali phakathi kwezingxenye ezimbili, okuvame ukubizwa ngokuthi izinhlangothi ze-A ne-B. Uhlangothi lwe-B luvame ukuba nengxube yama-polyol, asabela ngama-isocyanates ukukhiqiza i-polyurethane, kanye nama-catalysts, ama-flame retardants, ama-blowing agents, nama-surfactants. Uma lezi zingxenye zixutshwa, ziyasabela futhi zande, zanda ngomthamo izikhathi ezingu-30 kuya kwezingu-60. Lokhu kwanda kuvumela i-spray foam ukuthi ithathe isimo se-substrate esetshenziswa kuyo, idale isithiyo esingenamthungo esithuthukisa kakhulu ukuvikela ukushisa.

Ukusebenza kahle kokufakwa kwe-spray foam kuvame ukulinganiswa ngenani layo le-R, okubonisa ukumelana nokushisa. Amanani aphezulu e-R ahambisana nokusebenza okungcono kokufakwa kwe-insulation. Ama-spray polyurethane foam atholakala ngobuningi obuhlukahlukene kanye nezakhiwo zamaseli. I-spray foam ephansi, eyaziwa ngokuthi i-open-cell SPF, ithambile futhi iguquguquka kakhudlwana, kuyilapho i-high-density foam, noma i-closed-cell SPF, iqinile futhi inikeza izakhiwo zokufakwa kwe-insulation ezingcono kakhulu. Ngamakhilogremu angu-1.8 kuya kwangu-2 nge-cubic foot, i-closed cell spray foam inenani eliphakeme kakhulu le-R kunanoma iyiphi into yokufakwa kwe-spray foam etholakala kwezentengiselwano, okwenza kube ukukhetha okungcono kwezicelo zokwakha ezisebenzisa amandla kahle.

Kodwa-ke, ukukhiqizwa kwama-closed-cell spray foam kuvame ukuhilela ama-hydrofluorocarbon (HFC) blowing agents, ahlotshaniswa nekhono eliphezulu lokufudumala komhlaba. Lawa ma-agents anganciphisa kancane izinzuzo zesimo sezulu ezinikezwa ukonga amandla ngokushisa. Ukuze babhekane nalokhu kukhathazeka kwemvelo, abahlinzeki abaningi be-spray foam bashintshele ku-i-hydrofluoroolefin (HFO) izinto ezikhipha amagwebu kusukela ekuqaleni kuka-2017. Ama-HFO anamandla okufudumala komhlaba aphansi kakhulu futhi anikeza enye indlela eqhubekayo ngaphandle kokuphazamisa ukusebenza kokuvikela kwegwebu.

Ngaphezu kwamakhono ayo okuvikela, i-spray foam ingasebenza njengesivikelo somoya esisebenzayo, inciphise ukuvuza komoya futhi ifake isandla ekusebenzeni kahle kwamandla kwezakhiwo. Lesi sici siwusizo ikakhulukazi ezindaweni zokuhlala nezebhizinisi, lapho ukugcina amazinga okushisa angaphakathi alawulwayo kubalulekile.

Ukusetshenziswa kwama-catalyst, njengeI-MXC-41kanye ne-MXC-BDMA, idlala indima ebalulekile ekukhiqizweni kwe-spray foam. Lawa ma-catalyst asiza ukusheshisa ukusabela phakathi kwama-polyol nama-isocyanates, okuqinisekisa ukwakheka kwe-foam okusheshayo nokuphumelelayo. Ngokwenza ngcono inqubo yokwelapha, lawa ma-catalyst athuthukisa ukusebenza kanye nezakhiwo zokusetshenziswa kwe-spray foam, okwenza kube yinto ebalulekile embonini. I-Mingxu Chemical Company ikhiqize i-polyurethane catalyst iminyaka engaphezu kwengu-20 yomlando, sinendlela yenqubo engcono kakhulu kanye nethimba lochwepheshe, ukulawula okunembile kokukhiqizwa komswakama we-catalyst kanye nokuhlushwa kokulungiswa kwemakethe kanye nokuvuselela imikhiqizo ye-catalyst, inani elikhulu lezinto ezidingekayo, amakhasimende amukelekile ukuza ukuzobonisana.

Ekuphetheni, i-spray foam iyisisombululo esiwusizo sokuvikela ukushisa esihlanganisa ukumelana okuhle kakhulu nokushisa kanye nentuthuko enobungani nemvelo. Ngokuthuthuka okuqhubekayo kwezindlela ezintsha kanye nama-catalyst, i-spray foam isalokhu iyisinqumo esithandwayo samaphrojekthi okwakha nokuvuselela asebenzisa amandla amaningi.