Furo respray ipurasitiki inonyungudutsa inogadzirwa kuburikidza nemakemikari anoshandiswa pakati pezvikamu zviviri, zvinowanzozivikanwa semativi A neB. Rutivi rweB runowanzo kuve nemusanganiswa wemapolyol, ayo anoita nemaisocyanates kugadzira polyurethane, pamwe chete nemacatalysts, zvinodzora moto, zvinoputira, uye masurfactants. Kana zvikamu izvi zvikasanganiswa, zvinoita uye zvinokura, zvichiwedzera vhoriyamu ka30 kusvika ku60. Kuwedzera uku kunobvumira furo respray kutora chimiro chesubstrate yarinoiswa, zvichigadzira chipingamupinyi chisina musono chinovandudza zvakanyanya insulation yekupisa.
Kushanda kwespray foam insulation kunowanzo kuyerwa neR-value yayo, izvo zvinoratidza kuramba kupisa. R-values yepamusoro inoenderana nekushanda kuri nani kweinsulation. Spray polyurethane foams inowanikwa muhuwandu hwakasiyana-siyana uye maumbirwo emasero. Low-density spray foam, inozivikanwa se open-cell SPF, yakapfava uye inochinjika, nepo high-density foam, kana closed-cell SPF, yakasimba uye inopa hunhu hwakanaka hweinsulation. Pa 1.8 kusvika 2 pounds pa cubic foot, closed cell spray foam ine R-value yakakwira kupfuura chero chinhu chespray foam insulation chiri kutengeswa, zvichiita kuti ive sarudzo iri nani kune zvishandiso zvekuvaka zvinoshandisa simba shoma.
Zvisinei, kugadzirwa kwema "closed-cell spray foams" kunowanzosanganisira ma "hydrofluorocarbon" (HFC) blowing agents, ayo ane chekuita nekukwira kwekushisa kwepasi rose. Ma "agents" aya anogona kuderedza zvishoma mabhenefiti emamiriro ekunze anowanikwa nekuchengetedza simba kuburikidza ne "insulation". Kuti vagadzirise dambudziko iri rezvakatipoteredza, vazhinji vanopa ma "spray foam" vakachinja kuenda ku "hydrofluorocarbon" blowing agents.hydrofluoroolefin (HFO) zvinhu zvinofuridza furo kubvira kutanga kwa2017. HFOs dzine mukana wakaderera wekudziisa kwepasi rose uye dzinopa imwe nzira inogara kwenguva refu pasina kukanganisa mashandiro ekudzivirira furo.
Kuwedzera pakugona kwayo kudzivirira kupisa, furo rekupfapfaidza rinogonawo kushanda sechidziviriro chinoshanda chemhepo, richideredza kubuda kwemhepo uye richibatsira mukushanda zvakanaka kwesimba rezvivako. Hunhu uhwu hunonyanya kubatsira munzvimbo dzekugara nedzemabhizimisi, uko kuchengetedza tembiricha yemukati inodzorwa kwakakosha.
Kushandiswa kwezvinhu zvinokonzeresa njodzi, zvakaita seMXC-41uye MXC-BDMA, inoita basa rakakosha mukugadzirwa kwefuro rekupfapfaidza. Macatalyst aya anobatsira kukurumidzisa kuita pakati pemapolyol nemaisocyanates, zvichiita kuti furo riumbwe nekukurumidza uye zvinobudirira. Nekugadzirisa maitiro ekupisa, macatalyst aya anowedzera mashandiro uye hunhu hwekushandisa kwefuro rekupfapfaidza, zvichiita kuti zvive zvakakosha muindasitiri. Mingxu Chemical Company yakagadzira polyurethane catalyst kwemakore anopfuura makumi maviri enhoroondo, tine nzira yakanakisa yekushanda uye timu yehunyanzvi, kutonga kwakaringana kwekugadzirwa kwehunyoro hwecatalyst uye kuunganidzwa kwekugadzirisa musika uye kugadzirisa zvigadzirwa zvecatalyst, huwandu hwakawanda hwezvinhu, kugamuchira vatengi kuti vauye kuzobvunza.
Mukupedzisa, furo rekupfapfaidza imushonga unobatsira zvikuru unosanganisa kudzivirira kupisa kwakanaka pamwe nekuvandudzwa kusingakuvadzi nharaunda. Nekuenderera mberi kwekugadzirwa kwemafomu matsva uye zvinhu zvinokonzeresa, furo rekupfapfaidza richiri sarudzo yakakurumbira yemapurojekiti ekuvaka nekugadzira matsva asingashandise simba zvakanyanya.
Nguva yekutumira: Gumiguru-09-2024