Polyurethane Polymer System
Feem ntau ntawm kev ua haujlwm engineering rau polyurethane rollers tshwm sim thaum lub sijhawm tsim cov elastomer hauv ob sab phlu. Plaub yam khoom siv: polyol compound, diisocyanate compound, saw extender los yog curatives, thiab cov additives.
Polyurethane Elastomer
Kev sib xyaw ntawm polyol thiab diisocyanate compounds tsim cov prepolymer resin. Lawv ua ke los tsim ib qho yooj yim polymer saw los ntawm cov tshuaj tiv thaiv ntawm ib tug polyol tivthaiv (ib tug carbon- chained molecule nrog cawv ntawm ob hnub) nrog ib tug diisocyanate tivthaiv (ib tug molecule nrog isocyanate nyob rau ob hnub). Qhov no ua rau cov molecule nrog reactive cawv ntawm ib kawg thiab ib tug reactive isocyanate rau lwm yam. Cov cawv kawg txuas ntxiv mus rau lwm qhov isocyanate kawg lossis lub davhlau ya nyob twg, thaum lub isocyanate kawg ntawm tib cov saw txuas ntxiv cuam tshuam nrog cov saw txuas txuas ntxiv lossis cov tshuaj kho mob xws li hydroxyl thiab amines. Cov txheej txheem no txuas ntxiv mus, ua kom ntev, chained polyurethane molecule.
Cov khoom siv kho tshuab yog nyob ntawm kev tsim ntawm prepolymer resin thiab curatives. Cov khoom siv ntxiv yog siv los txhim kho cov khoom ntawm polyurethane, xws li resin curing lub sij hawm, machinability, xim, UV tiv thaiv, thiab lwm yam. Ceev faj proportioning ntawm additives txheeb ze npaum li cas ntawm resin nyob rau hauv cov sib tov yog yuav tsum tau vim nws muaj peev xwm tsis muaj zog cov khoom ntawm cov khoom.