Dab tsi yogPIR thiab PUR rwb thaiv tsev khoom?
PIR thiab PUR yog dab tsi?
Thawj daim ntawv thov kev lag luam rau polyurethanes tau tsim nyob rau hauv nruab nrab -20 xyoo pua. Txij thaum ntawd los, lawv tau nrhiav kev siv ntau ntxiv hauv kev lag luam xws li kev tsim kho, tsheb, tub yees, rooj tog zaum thiab khau. Polyurethanes muaj ntau yam zoo heev thiab pom nyob ib puag ncig peb hauv ntau yam khoom txhua hnub.
Dab tsi yog qhov zoo ntawm PIR thiab PUR rwb thaiv tsev cov khoom?
Rigid polyurethane (PUR) thiab polyisocyanurate (PIR) rwb thaiv tsev cov khoom siv tau zoo heev, lub teeb yuag, thiab ntau yam muaj peev xwm ua raws li cov khoom siv feem ntau. Nws zoo heev thermal conductivity thiab siab zog rau qhov hnyav piv, ua ke nrog kev tsim khoom zoo, muab ntau yam khoom. Yog li ntawd, PIR thiab PUR rwb thaiv tsev cov khoom yog lub ntuj xaiv rau feem ntau cov tsev rwb thaiv tsev daim ntaub ntawv.
Kev tsim khoom ntawm PIR thiab PUR rwb thaiv tsev
Rigid PUR rwb thaiv tsev cov khoom yog tsim los ntawm reacting ib tug kua polyol tivthaiv nrog ib tug kua polymeric isocyanate tivthaiv, methylene diphenyl diisocyanate (MDI) nyob rau hauv lub xub ntiag ntawm ib tug tshuab nqus tsev neeg thiab lwm yam additives. Cov khoom sib xyaw ces ua rau exothermically los tsim cov thermosetting polymer nruj thiab, txij li lub tshuab tshuab evaporates thaum lub sij hawm exothermic cov tshuaj tiv thaiv, ib qho kaw-cell, tsawg-density nruj insulating khoom yog tsim. Cov rwb thaiv tsev zoo vim tias cov roj txuas rau hauv cov qauv xov tooj ntawm tes vim yog qhov muaj kwv yees li 97% ntawm cov npuas dej yog cov roj av.
Rigid PIR txawv ntawm PUR nyob rau hauv uas nws yog tsim los siv ntau tshaj ntawm MDI tivthaiv. Nyob rau hauv lub xub ntiag ntawm ib tug tsim nyog catalyst, tshaj MDI reacts nrog nws tus kheej los tsim isocyanurate uas yog yus muaj los ntawm nce thermal stability. Qhov tshwm sim PIR rwb thaiv tsev cov khoom nthuav tawm cov hluav taws kub ua tau zoo dua thiab qis dua thiab ua haujlwm kub siab dua piv rau PUR thiab thaum muab tso rau hauv cov khoom siv, tuaj yeem ua tau raws li qee qhov kev xav tau hluav taws kub zoo tshaj plaws xws li tam sim no tau teev tseg rau qee daim ntawv thov los ntawm kev pov hwm kev lag luam.
Polyurethane yog ib qho ntawm 6 cov khoom siv hluavtaws zoo nyob hauv lub ntiaj teb. Vim nws cov khoom lag luam zoo heev thiab daim ntawv thov dav, nws yog qhov tseem ceeb hauv kev lag luam hauv ntiaj teb.
Yog xav paub ntxiv txog cov khoom siv rwb thaiv tsev, koj tuaj yeem tiv tauj ntawm +8617853343111. Koj tuaj yeem tiv tauj peb ntawm admin@beiqiao.net lossis sau daim foos tiv toj hauv qab no. Thaum koj hu rau peb, peb tuaj yeem muab cov lus hais dawb rau koj thiab peb tuaj yeem tham txog peb cov khoom thiab cov kev pabcuam.