Dab tsi yog qhov sib txawv ntawm TPU thiab PU?

Dab tsi yog qhov sib txawv ntawmTputhiab PU?

TPU (Polyurethane Elastomer)

TPU (Thermoplastic Polyurethane Elastomer)yog cov roj hmab tawm ntawm ntau yam. Vim tias nws cov txheej txheem zoo, huab cua tsis kam, thiab ib puag ncig cov phooj ywg, tpu yog siv cov khoom lag luam xws li cov ntaub ntawv khau, cov yeeb yaj kiab, cov zaub mov, thiab xov hlau, thiab xaim.

Polyurethane thermoplastic elastomer, tseem hu ua thermoplastic polyurethane roj hmab, yog hom (ab) n-block linear polymer. A yog lub siab molecular hnyav (1000-6000) polyester los yog polyether lossis b yog ib rab koob muaj 2-12 ncaj saw carbon atoms. Tus qauv tshuaj sib txuam ntawm Ab ntu yog Diisocyanate, feem ntau txuas los ntawm MDI.

Thermoplastrastic Polyurethane Roj Hmab vam ntawm cov qauv sib xyaw ua ke ntawm cov qauv sib xyaw ua ke ntawm cov qauv sib xyaw ua ke nrog kev nce qib nrog kev nce qib lossis txo qis. Nyob rau hauv cov molten lossis daws lub xeev, intermolular rog tsis muaj zog, thiab tom qab txias kev sib txuas ua ke, rov kho cov khoom ntawm cov khoom qub.

Polyurethane Thermoplastic elastomersYuav muab tau cais rau ob hom: polyester thiab polyether thiab polyether thiab dawb tsis xwm yeem lossis cov txheeb ze ntawm 1.10-1.25. Hom polyether muaj cov txheeb ze tus txheeb ze ntau dua li hom polyester. Lub iav hloov cua sov ntawm hom duab polyether yog 100.6-106.1 ℃, thiab hom polyester yog 108.9 ℃. Hom Brittleness Kub ntawm hom kev sib tw thiab hom qib polyester yog qhov qis dua -62 ℃, thaum lub sijhawm tsis tshua muaj zog ether ether yog qhov zoo dua li ntawm polyester yam.

Cov yam ntxwv zoo tshaj plaws ntawm Polyurethane Thermoplastic elastomers yog qhov nyuaj, muaj cov roj tsis zoo, thiab ib puag ncig tsis kam. Nyob rau hauv ib puag ncig vaum, lub hydrolysis muaj kev ruaj khov ntawm polyether hom deb tshaj li ntawm polyester hom.

Polyurethane thermoplastic elastomers yog tsis muaj tshuaj lom thiab tsis muaj ntxhiab tsw, ua kom huv si, Lawv nthuav tawm ib qho tsis muaj xim thiab pob tshab lub xeev thiab muaj kev cia khoom ruaj khov.