Kev lag luam tshuaj lom neeg tsim ntau yam khoom siv tsis txaus ntseeg, thiab ntawm lawv, polyurethane prepolymer yog suav tias yog ib qho tseem ceeb tshaj plaws thiab ntau yam khoom. Polyurethane prepolymers ua lub luag haujlwm tseem ceeb hauv kev tsim cov khoom siv tau yooj yim thiab ruaj khov siv hauv ntau yam kev siv. Hauv tsab xov xwm no, peb yuav tshuaj xyuas seb polyurethane prepolymers yog dab tsi thiab lawv siv li cas hauv ntau daim ntawv thov kev lag luam.
Polyurethane Prepolymer yog dab tsi?
Polyurethane prepolymer yog lub hauv paus tsev thaiv ntawm polyurethanes. Chemically, lawv yog cov tebchaw uas muaj pawg isocyanate thiab hydroxyl lossis amine pawg. Thaum cov khoom no tshwm sim, lawv tsim cov saw tseem ceeb ntawm polyurethane polymers. Polyurethanes yog tsim los ntawm cov tshuaj lom neeg cov tshuaj tiv thaiv uas muab tau yooj yim, durability, thiab zoo heev txhua yam khoom.
Environmentally Friendly:Bio-based prepolymers tau txais los ntawm cov khoom siv txuas ntxiv tau muab kev xaiv ib puag ncig zoo dua piv rau fossil roj-raws li lwm txoj hauv kev. Qhov no pab txhawb kev tsim khoom ruaj khov thiab qis dua cov pa roj carbon monoxide.
Thermoplastic thiab Thermoset:Thermoplastic polyurethane prepolymers muaj peev xwm hloov cov duab thiab tuaj yeem hloov kho thaum cua sov. Thermoset polyurethanes, ntawm qhov tod tes, muab kev ruaj ntseg ntawm qhov kub thiab txias thiab siv rau hauv kev tsim cov khoom nruj thiab ruaj khov.
Foamability:Cov khoom no tso cai rau kev tsim cov khoom hnyav thiab cov ntaub ntawv insulating heev. Foamable polyurethanes feem ntau yog siv rau hauv kev rwb thaiv tsev ntawm cov tsev thiab hauv kev tsim cov ntaub ntawv uas txuag lub zog hauv cov cua txias.
Chemical Resistance:Polyurethane prepolymer yog siv dav hauv kev tsim cov txheej txheem tiv thaiv rau cov khoom lag luam uas raug tshuaj lom los yog tshuaj abrasive.
Flexibility thiab Mechanical Properties:Polyurethane prepolymers tuaj yeem nthuav tawm cov khoom elastomeric, txhim kho qhov yooj yim thiab cuam tshuam ntawm cov khoom, ua rau lawv zoo tagnrho rau ntau yam kev siv, los ntawm cov khoom siv kis las mus rau khau.