Dab tsi yog qhovPolyether Polyols siv rau lub tub yees?
Hauv cov khoom siv polyurethane, nws cov khoom siv foaming nyiaj ntau dua 80% ntawm tag nrho, uas muaj cov yam ntxwv ntawm cov thermal conductivity tsawg thiab kev ua haujlwm zoo. Nws yog heev haum rau rwb thaiv tsev thiab rwb thaiv tsev. Yog li ntawd kub txheej.
Thermal rwb thaiv tsev txheej yog ib qho tseem ceeb ntawm lub tub yees. Feem ntau ntawm cov tub yees manufacturers txais cov txheej txheem teb foaming. Cov ntaub ntawv tseem ceeb yog siv rau polyol, isocyanate thiab cycloralane. Kev tsim ua npuas ncauj qis, thiab los ntawm kev kho qhov sib txawv ntawm cov khoom siv raw, tswj qhov ceev ntawm cov npuas dej thiab cov nyhuv ntawm cov npuas dej kom tau txais qhov zoo tshaj plaws thermal rwb thaiv tsev nyhuv.
Ntawm cov nqi yas uas yuav tsum tau muaj, PUs suav txog li 40 ~ 50% ntawm tus nqi feem.
Hauv cov khoom siv polyurethane, nws cov khoom siv foaming nyiaj ntau dua 80% ntawm tag nrho, uas muaj cov yam ntxwv ntawm cov thermal conductivity tsawg thiab kev ua haujlwm zoo. Nws yog heev haum rau rwb thaiv tsev thiab rwb thaiv tsev. Yog li ntawd kub txheej.
Thermal rwb thaiv tsev txheej yog ib qho tseem ceeb ntawm lub tub yees. Feem ntau ntawm cov tub yees manufacturers txais cov txheej txheem teb foaming. Cov ntaub ntawv tseem ceeb yog siv rau polyol, isocyanate thiab cycloralane. Kev tsim ua npuas ncauj qis, thiab los ntawm kev kho qhov sib txawv ntawm cov khoom siv raw, tswj qhov ceev ntawm cov npuas dej thiab cov nyhuv ntawm cov npuas dej kom tau txais qhov zoo tshaj plaws thermal rwb thaiv tsev nyhuv.
Ntawm cov nqi yas uas yuav tsum tau muaj, PUs suav txog li 40 ~ 50% ntawm tus nqi feem.
Cov khoom siv raw ntawm polyether polyol muaj ntau, tus nqi ntawm polyether polyol rau cov pa nyuaj npuas yog tsawg, thiab polyether-type polyurethane polyurethane muaj hydrolysis zoo.
Qhov zoo ntawm polyester polyol yog qhov ua npuas ncauj lub cev yog qhov loj, nplaum nplaum zoo, siab txuas ntxiv, thiab cov roj ua haujlwm zoo. Qhov tsis zoo yog tias hydrolysis kuj tsis zoo li polyether-type foam. Polyether polyol series cov khoom siv yog siv los npaj cov tawv polyurethane ua npuas ncauj yas, thiab dav siv hauv cov tub yees, lub freezer, tub yees, rwb thaiv tsev board, pipeline rwb thaiv tsev thiab lwm yam.
Cov khoom cua kub coefficients yog tsawg thiab ruaj khov nyob rau hauv loj. Nws kuj yog ib qho tseem ceeb raw khoom rau kev npaj ib tug ua ke ntawm polyether. Kev tsim cov polyether polyol feem ntau yog siv hauv polyurethane ua npuas ncauj yas hauv kev lag luam polyurethane. Lub ntsiab ntau yam muaj xws li polyoxide acrylyl cawv thiab polythexyfurate polyol.