PU khoom yog dab tsi?
Basic txhais ntawm cov khoom PU
PU sawv cev rau Polyurethane, cov khoom siv polymer uas tau siv dav hauv ntau yam lag luam. Polyurethane yog tsim los ntawm cov tshuaj tiv thaiv ntawm ib qho isocyanate thiab polyol, thiab muaj ntau yam ntawm lub cev thiab tshuaj. Vim tias PU tuaj yeem muaj nws cov khoom hloov kho los ntawm kev hloov nws cov muaj pes tsawg leeg, nws yog siv rau ntau yam kev siv, los ntawm cov ris tsho mus rau cov khoom siv.
Classification thiab Properties ntawm PU
Polyurethane tuaj yeem muab faib ua ntau hom ntawv, suav nrog cov foams nruj, hloov tau yooj yim foams, elastomers, coatings thiab adhesives. Rigid foams feem ntau yog siv rau rwb thaiv tsev thiab lub tsev vaj huam sib luag, thaum cov foams hloov tau siv dav hauv rooj tog zaum, lub rooj zaum hauv tsheb thiab txaj. Elastomers, ntawm qhov tod tes, pom cov roj hmab zoo li elasticity thiab siv rau khau khau, log tsheb thiab lwm yam. Vim nws cov elasticity zoo, abrasion tsis kam, roj tsis kam thiab kev laus ua haujlwm, PU cov ntaub ntawv nthuav tawm cov kev ua tau zoo hauv ntau daim ntawv thov.
Kev siv PU hauv ntau qhov kev lag luam
Polyurethane muaj ntau yam kev siv hauv ntau qhov chaw. Piv txwv li, hauv kev lag luam textile, PU feem ntau yog siv los tsim cov tawv tawv, uas muaj kev ntxhib los mos zoo ib yam li tawv, tab sis pheej yig dua thiab yooj yim rau kev tswj. Hauv kev tsim kho kev lag luam, PU ua npuas ncauj yog siv los ua cov khoom siv rwb thaiv tsev zoo, nyiam rau nws cov thermal conductivity tsawg thiab zoo ya raws. Hauv kev lag luam tsheb, cov ntaub ntawv PU yog siv los tsim cov rooj zaum foams thiab sab hauv trim qhov chaw vim nws muab kev nplij siab thiab ua haujlwm ntev.
Environmental friendliness thiab sustainability ntawm PU cov ntaub ntawv
Raws li ib puag ncig kev paub ntau ntxiv, kev ruaj khov ntawm PU cov ntaub ntawv tau dhau los ua qhov kev txhawj xeeb loj. Kev lig kev cai, qee cov tshuaj tsis zoo yuav raug siv rau hauv kev tsim cov PU, tab sis nyob rau xyoo tas los no, kev lag luam tau tsim cov txheej txheem tsim khoom zoo ib puag ncig xws li dej-raws li polyurethane thiab siv cov khoom siv txuas ntxiv dua tshiab. Cov ntaub ntawv PU tshiab no tsis tsuas yog txo qhov cuam tshuam rau ib puag ncig, tab sis kuj txhim kho cov khoom lag luam kev nyab xeeb thiab kev ruaj ntseg.
Cov ntsiab lus
PU khoom yog dab tsi? Nws yog cov khoom siv ntau yam, kev ua haujlwm siab polymer uas tau siv dav hauv ntau yam kev lag luam. Txawm nyob rau hauv cov khaub ncaws, kev tsim kho, tsheb, los yog kev tiv thaiv ib puag ncig, PU yog haum rau nws zoo heev physicochemical zog. Nrog rau kev nce qib ntawm cov thev naus laus zis thiab kev txhim kho ntawm kev tiv thaiv ib puag ncig, daim ntawv thov muaj peev xwm thiab qib kev ua haujlwm ntawm PU cov ntaub ntawv yuav txuas ntxiv nthuav dav thiab txhim kho.