Qhov sib txawv tseem ceeb ntawm polyurethane urethane thiab varathane yog polyurethane yog cov khoom siv polymer thiab urethane yog qhov sib txuas ntawm cov monomers ntawm polyurethane polymer, whereas varathane yog hom ntoo stain.
Txawm hais tias cov ntsiab lus polyurethane, urethane, thiab varathane suab zoo sib xws, lawv txawv ntawm ib leeg. Cia peb tham hauv qab no qhov sib txawv ntawm polyurethane urethane thiab varathane hauv kab lus no.
YPolyurethane yog dab tsi?
Polyurethane yog ib qho polymer ua los ntawm isocyanates thiab polyols. Cov polymer no txawv ntawm lwm cov ntaub ntawv polymer feem ntau vim tias lwm cov ntaub ntawv polymer muaj npe nyob ntawm cov monomers, tab sis cov polymer no muaj npe vim yog cov urethane linkages rov ua dua thoob plaws hauv cov khoom.
Thaum xav txog kev tsim cov khoom, nws siv cov tshuaj tiv thaiv exothermic ntawm cawv nrog ob lossis ntau pawg ua haujlwm (peb hu lawv "polyols") thiab isocyanates muaj ntau dua ib pawg isocyanate-reactive. Ob lub tebchaw no yog cov monomers ntawm polyurethane. Qhov no txhais tau tias tsis muaj urethane monomers hauv cov khoom no.
Daim duab 01: Kev sib xyaw ntawm Polyurethane
Muaj ntau yam tseem ceeb siv ntawm polyurethane. Nws feem ntau yog siv los ua npuas ncauj ua npuas ncauj rau lub txaj, cushions, thiab lwm yam. Qhov thib ob, nws yog qhov tseem ceeb rau cov khoom ua npuas ncauj. Tsis tas li ntawd, muaj qee qhov kev siv xws li molded ua npuas ncauj, elastomer ntau lawm, rau adhesives, sealers, coatings, thiab lwm yam.
Muaj ob hom polyurethane ua aliphatic daim ntawv thiab daim ntawv uas muaj ntxhiab. Aliphatic polyurethane los yog aliphatic acrylic polyurethane yog cov khoom siv polymer uas tsis muaj cov qauv uas muaj ntxhiab. Nws yog ib qho tseem ceeb raws li txheej txheej hauv kev lag luam thiab kev siv hauv tsev. Cov qauv tshuaj ntawm cov khoom siv polymer no tseem ceeb vim tias cov khoom siv no yog tawv thiab hloov tau. Yog li ntawd, cov khoom no yog ib qho additive rau ntau yam khoom kom tau ib tug check tiav. Feem ntau, cov khoom siv no yog siv rau sealants thiab coatings uas yog npaj rau kev siv sab nraud.
Aromatic polyurethane yog cov khoom siv polymer uas muaj cov qauv zoo nkauj, muaj ntxhiab tsw. Cov qauv ntawm aromatic polyurethane txawv ntawm aliphatic polyurethane raws li cov qauv ntawm cov isocyanate siv hauv kev tsim khoom. Yog hais tias isocyanate yog aromatic, ces cov khoom siv polymer ua aromatic. Cov tshuaj tsw qab tshaj plaws yog toluene diisocyanate (TDI), diphenylmethane diisocyanate (MDI), thiab naphthalene diisocyanate (NDI). Ntawm no, toluene diisocyanate feem ntau yog siv los ua kev sib xyaw ntawm ob isomers. Feem ntau, TDI thiab MDI yog siv rau kev tsim cov thermoplastic elastomers thiab foams, tab sis lawv cov ntaub ntawv polymeric yog siv rau coatings, sealants, thiab adhesives.
YUrethane yog dab tsi?
Y Urethane yog kev sib txuas ntawm isocyanate thiab polyols hauv polyurethane. Lub npe ntawm polyurethane polymer yog muab los ntawm cov kev sib txuas; "poly" txhais tau tias "ntau"; Yog li, polyurethane txhais tau hais tias ntau qhov sib txuas ntawm urethane. Tsis zoo li ntau lwm cov ntaub ntawv polymer, cov polyurethane polymer muaj npe raws li kev sib txuas ntawm nws cov monomers.
Varathane yog dab tsi?
Varathane yog hom ntoo stain. Muaj ntau hom varathane sealers thiab kho cov khoom thiab. Cov khoom no tuaj yeem daws tau yuav luag txhua qhov kev tu ntoo ntawm cov neeg siv khoom. Cov tshuaj no ua rau kev kho ntoo yooj yim heev. Tsis tas li ntawd, nws muab cov kws tshaj lij tiav, qhov kawg durability thiab zoo meej clarity, uas coj tawm kev zoo nkauj ntawm ntuj ntoo. Daim ntawv thov ntawm cov ntoo no muaj xws li cov plag tsev, qhov rooj, rooj tog zaum, txee, trim, paneling, railings, thiab lwm yam.
Polyurethane thiab varathane muaj txiaj ntsig tau txais kev ua tiav zoo ntawm cov ntoo. Txawm li cas los xij, tsis zoo li varathane, polyurethane nyiam ua kom tiav nrog ntau gloss. Tab sis ob qho tib si cov ntaub ntawv no feem ntau yog pob tshab, tso cai rau cov ntoo los qhia nws txoj kev zoo nkauj.
Qhov txawv ntawm Polyurethane Urethane thiab Varathane yog dab tsi?
Txawm hais tias cov ntsiab lus polyurethane, urethane thiab varathane suab zoo sib xws, lawv txawv ntawm ib leeg. Qhov sib txawv tseem ceeb ntawm polyurethane urethane thiab varathane yog polyurethane yog cov khoom siv polymer thiab urethane yog qhov sib txuas ntawm cov monomers ntawm polyurethane polymer, whereas varathane yog hom ntoo stain.
Summary – Polyurethane vs Urethane vs Varathane
Txawm hais tias cov ntsiab lus polyurethane, urethane thiab varathane suab zoo sib xws, lawv txawv ntawm ib leeg. Qhov sib txawv tseem ceeb ntawm polyurethane urethane thiab varathane yog polyurethane yog cov khoom siv polymer thiab urethane yog qhov sib txuas ntawm cov monomers ntawm polyurethane polymer, whereas varathane yog hom ntoo stain.
