I-spray foam yinto yokufakelwa eguquguqukayo eyenziwe nge-chemical reaction phakathi kwezinto ezimbini, ezibizwa ngokuba ziicala ze-A kunye ne-B. Icala le-B lidla ngokuba nomxube wee-polyols, ezisabela kunye nee-isocyanates ukuvelisa i-polyurethane, kunye nee-catalysts, ii-flame retardants, ii-blowing agents, kunye nee-surfactants. Xa ezi zinto zixutyiwe, ziyasabela kwaye zande, zanda ngomthamo ngama-30 ukuya kuma-60 amaxesha. Olu lwandiso luvumela i-spray foam ukuba ithathe imo ye-substrate esetyenziswa kuyo, idala umqobo ongenamthungo ophucula kakhulu i-thermal insulation.
Ukusebenza kakuhle kwe-spray foam insulation kudla ngokulinganiswa nge-R-value yayo, ebonisa ukumelana nobushushu. Amaxabiso aphezulu e-R ahambelana nokusebenza ngcono kwe-insulation. Ii-spray polyurethane foams ziyafumaneka kwiindidi ezahlukeneyo kunye nezakhiwo zeeseli. I-low-density spray foam, eyaziwa ngokuba yi-open-cell SPF, ithambile kwaye iguquguquka ngakumbi, ngelixa i-high-density foam, okanye i-closed-cell SPF, iqinile kwaye inika iipropati ze-insulation eziphezulu. Kwi-1.8 ukuya kwi-2 pounds nge-cubic foot, i-closed cell spray foam inexabiso eliphezulu le-R kunayo nayiphi na into ye-spray foam insulation ethengiswayo, okwenza kube lukhetho olungcono kwizicelo zokwakha ezisebenzisa amandla amaninzi.
Nangona kunjalo, ukuveliswa kwee-closed-cell spray foams kudla ngokubandakanya ii-hydrofluorocarbon (HFC) blowing agents, ezinxulunyaniswa nokukwazi ukufudumala kwehlabathi. Ezi arhente zinokunciphisa kancinci iingenelo zemozulu ezibonelelwa kukonga amandla ngokufakelwa kwe-insulation. Ukujongana nale ngxaki yokusingqongileyo, abathengisi abaninzi be-spray foam baye batshintshela kwi-i-hydrofluoroolefin (HFO) ii-arhente zokukhupha amagwebu ukususela ekuqaleni kuka-2017. Ii-HFO zinamandla aphantsi kakhulu okufudumala kwehlabathi kwaye zibonelela ngenye indlela ezinzileyo ngaphandle kokuphazamisa ukusebenza kobushushu begwebu.
Ukongeza kwizakhono zayo zokuthintela ukugquma, i-spray foam ingasebenza njengomqobo womoya osebenzayo, inciphisa ukuvuza komoya kwaye inegalelo ekusebenzeni kakuhle kwamandla kwezakhiwo. Olu phawu luluncedo ngakumbi kwiindawo zokuhlala kunye nezoshishino, apho ukugcina amaqondo obushushu alawulwayo ngaphakathi kubalulekile.
Ukusetyenziswa kwezinto ezibangela uxinezeleko, ezifanaI-MXC-41kunye ne-MXC-BDMA, zidlala indima ebalulekileyo ekuvelisweni kwe-spray foam. Ezi catalysts zinceda ekukhawuleziseni impendulo phakathi kwe-polyols kunye ne-isocyanates, ziqinisekisa ukwakheka kwe-foam ngokukhawuleza nangokufanelekileyo. Ngokwenza ngcono inkqubo yokunyanga, ezi catalysts ziphucula ukusebenza kunye neempawu zokusetyenziswa kwe-spray foam, zizenze zibe yinto ebalulekileyo kushishino. I-Mingxu Chemical Company ivelise i-polyurethane catalyst kangangeminyaka engaphezu kwama-20 yembali, sinendlela yenkqubo engcono kakhulu kunye neqela leengcali, ulawulo oluchanekileyo lwemveliso ye-catalyst moisture kunye noxinzelelo lokuphucula imakethi kunye nokuhlaziya iimveliso ze-catalyst, inani elikhulu lezinto ezifunekayo, wamkelekile abathengi ukuba beze kukubonisana.
Ukuqukumbela, i-spray foam sisisombululo esixabisekileyo sokukhusela ubushushu esidibanisa ukumelana okuhle kobushushu kunye nophuhliso olunobuhlobo nokusingqongileyo. Ngokuqhubeka nophuhliso lweendlela ezintsha kunye nee-catalysts, i-spray foam isalokhu ilukhetho oludumileyo kwiiprojekthi zokwakha nezokuhlaziya ezisebenzisa amandla amaninzi.
Ixesha lokuthumela: Okthobha-09-2024