Hom Polyurethane
1, Polyurethane ua npuas ncauj yog cov khoom ua npuas ncauj nrog cov zis ntau tshaj plaws. Tus txheeb ze ntom ntom feem ntau yog nyob nruab nrab ntawm 0.03 thiab 0.06. Cov thermal conductivity ntawm cov npuas tawv tawv tsuas yog kwv yees li 40 feem pua ntawm cov cork lossis polystyrene ua npuas ncauj. Nws muaj lub zog txaus, roj tsis kam thiab muaj peev xwm sib txuas. Nws yog ib qho zoo heev shockproof, rwb thaiv tsev kub thiab suab rwb thaiv tsev khoom. Nws yog dav siv rau rwb thaiv tsev ntawm cov khoom siv hauv tsev (cov tub yees, lub tub yees, lub tub yees, lub rhaub dej, lub hnub ci dej rhaub dej, lub twj tso kua mis lub rhaub dej, lub raj mis preservation barrels, incubators, thiab lwm yam.) Cov khoom siv thermal rwb thaiv tsev (cov kav dej kub, cov raj xa dej tsis zoo, lub tank lub cev. , kev thauj mus los hauv tub yees, cov neeg caij tsheb thermal rwb thaiv tsev, thiab lwm yam), kev txuag hluav taws xob (sab nrauv phab ntsa thermal rwb thaiv tsev, ru tsev waterproof thermal rwb thaiv tsev, txias cia, lub tsev phaj, tiv thaiv tub sab qhov rooj / lub qhov rooj chav nres tsheb, dov lub qhov rooj, thiab lwm yam), xws li nrog rau kev ntim khoom thiab kho kom zoo nkauj (duab board, imitation ntoo rooj tog, handicrafts, thiab lwm yam). Polyurethane hloov tau ua npuas ncauj muaj qhov zoo elasticity thiab kuj yog ib qho zoo tagnrho cushion thiab ntaub pua chaw.
2, Polyurethane roj hmab tuaj yeem muab faib ua hom sib xyaw, hom thermoplastic thiab casting hom raws li nws txoj kev ua haujlwm. Cov roj hmab sib xyaw yog saturated los yog hydroxyl terminated polyurethane nrog me me ntawm ob daim ntawv cog lus. Nws tuaj yeem ua tiav thiab tsim los ntawm cov txheej txheem ua cov roj hmab zoo tib yam, thiab cov khoom tsim tawm me me. Thermoplastic roj hmab tuaj yeem muab faib ua cov thermoplastic tag nrho thiab semi thermoplastic. Tus qub muaj cov qauv linear thiab tom kawg muaj me me ntawm crosslinking. Lawv tuaj yeem tsim los ntawm cov txheej txheem thermoplastic thiab khoom siv. Cam khwb cia roj hmab feem ntau yog ua los ntawm cov kua prepolymer thiab saw extender, uas yog sib tov sai sai thiab tom qab ntawd cam khwb cia rau hauv cov duab los yog tshuaj tsuag, muaj zog adaptability. Tam sim no, kwv yees li ob feem peb ntawm cov khoom siv roj hmab polyurethane yog molded los ntawm txoj kev casting. Cov tshuaj tiv thaiv kev txhaj tshuaj molding tshuab tau tshwm sim nyob rau xyoo tas los no tuaj yeem raug txhaj ncaj qha los ntawm cov kua monomer thiab cov tshuaj tiv thaiv sai. Nws muaj qhov zoo ntawm kev ua haujlwm siab ntau lawm, cov cuab yeej siv tsawg dua thiab kev ua haujlwm zoo.
③ Polyurethane txheej yog muab faib ua ob lub ntsiab lus thiab ib qho khoom siv: ob lub ntsiab lus polyurethane txheej yog polyether, thiab ob lub ntsiab lus ntawm polyisocyanate thiab polyether yog sib xyaw ncaj qha; Ib qho kev tivthaiv polyurethane txheej yog unsaturated polyester hom, nrog rau cov roj hloov hom, ntub curing hom thiab kaw hom. Polyurethane txheej yuav tsum tau siv los ntawm kev txau, electrodeposition thiab impregnation. Cov txheej yog hnav-resistant, resistant rau roj av, roj, dej thiab inorganic acid vapor, muaj rwb thaiv tsev siab thiab adhesion, thiab muaj xim ci rau lub sijhawm ntev.
④ Polyurethane nplaum feem ntau yog tsim los ntawm ob lub ntsiab lus ntawm polyisocyanates thiab hydroxyl uas muaj cov tshuaj polyester. Nws tuaj yeem muaj cov tshuaj tua kab mob, hmoov muab tub lim (titanium oxide, zinc oxide, cement), hnyav (acetone, ethyl acetate, chlorinated hydrocarbon). Ob qhov sib xyaw ua ke ncaj qha ua ntej daim ntawv thov, thiab lub sijhawm cia yog 1 ~ 3H. Lub sij hawm kho yuav tsum tsis pub tsawg tshaj 24h ntawm chav tsev kub, los yog 1 ~ 3H ntawm 100 ~ 150 degree thiab pressurized rau 0.03 ~ 0.05Mpa. Cov nplaum zoo li no muaj lub zog nplaum siab nrog ntau yam ntaub ntawv. Tom qab kho, nws ruaj khov rau dej, ntxhia roj, roj, aromatics thiab cua. Qhov kub ua haujlwm yog - 200 ~ 120 degree, thiab tus nqi yog kim. Nws yog siv rau kev sib txuas ntawm cov hlau, yas, iav thiab ceramics hauv aviation, chaw siv tshuab, kev tsim kho thiab tshuab, nrog rau kev luam cov ntaub ntawv ntawm polymer zaj duab xis, kev sib txuas ntawm ib leeg thiab sab sauv, thiab lwm yam.
