Yas Polyurethane (PU)
* Polyurethane (PU) yog lub npe luv ntawm polyurethane, polyisocyanate thiab polyhydroxy polymer polymerization, yog nyob rau hauv lub ntsiab saw ntawm polymers uas muaj ntau repetitive urethane saw segments (-NHCOO-) ntawm polymer compounds.
* Cov khoom yas PU customized
Polyurethane, tseem hu ua polyurethane thiab polyurethane, yog ib chav kawm ntawm macromolecules uas muaj cov yam ntxwv urethane hauv cov saw hlau tseem ceeb. Hom khoom siv polymer no muaj ob qho tib si elasticity ntawm roj hmab thiab lub zog thiab kev ua haujlwm zoo ntawm cov yas, thiab muaj txiaj ntsig zoo rau kev siv hauv xya qhov chaw tseem ceeb ntawm cov yas, roj hmab, ua npuas ncauj, fiber, txheej, nplaum thiab cov polymers ua haujlwm. Hauv kev lag luam nws yog siv dav hauv cov log tsheb qeeb qeeb, gaskets, tsheb lev thiab lwm yam teb. Hauv lub neej txhua hnub, polyurethane yog siv los ua ntau yam ua npuas ncauj thiab yas daim txhuam cev.
Koj tuaj yeem ua dab tsi nrog PU Yas?
Polyurethane elastomers yog ib chav kawm ntawm cov ntaub ntawv nrog ob qho tib si roj hmab thiab yas cov khoom, nrog lub zog tensile zoo, lub zog tsim kua muag, kev cuam tshuam tsis kam, kev sib txhuam tsis kam, huab cua tsis kam, hydrolysis tsis kam, roj tsis kam thiab lwm yam zoo.
Feem ntau siv ua cov khoom siv hauv tsev (xws li cov yeeb nkab, cov gaskets, siv, cov menyuam, cov iav, cov kav dej, thiab lwm yam), cov khoom rwb thaiv tsev, cov khau hauv qab thiab cov log tsheb khov kho. Piv txwv li, ua lub phaj lim dej mining, nws muaj suab nrov qis dua, permeability siab thiab hnav tsis kam dua li cov phaj lim hlau ib txwm muaj. Tsis tas li ntawd, polyurethane muaj kev sib raug zoo heev, ua cov khoom siv biomedical, nws tuaj yeem siv rau hauv cov tshuab pacemakers, cov hlab ntsha dag, pob txha dag, thiab lwm yam.
Cov hauv qab no yog qee cov ntawv thov rau Polyurethane (PU)
- Kev Thauj Mus Los
- Kev Tsim Kho
- Tshuab
- Cov khoom siv hluav taws xob
- Rooj tog
- Kev Ua Zaub Mov
- Cov ntaub thiab khaub ncaws
- Tawv ua los ntawm cov khoom siv hluavtaws
- Kev luam ntawv
- Kev lag luam roj av
- Kev Ua Si
- Kev Kho Mob
Cov yam ntxwv ntawm Polyurethane (PU)
* Ua npuas dej Polyurethane muab faib ua 2 hom: ua npuas dej khov thiab ua npuas dej yooj ywm, nrog rau kev ywj pheej zoo heev, elongation, compression zog thiab kev ywj pheej, nrog rau kev ruaj khov tshuaj zoo. Tsis tas li ntawd, ua npuas dej polyurethane muaj kev ua haujlwm zoo heev, kev nplaum, kev rwb thaiv tsev thiab lwm yam khoom, uas yog vim muaj kev ua tau zoo heev ntawm cov khoom siv cushioning.
Vim nws cov qauv, polyurethane elastomer muaj 2 ntu saw hlau mos thiab tawv, yog li cov saw hlau molecular tuaj yeem tsim los muab cov khoom siv lub zog siab, zoo toughness, hnav-resistant, roj-resistant thiab lwm yam zoo heev, hu ua "hnav-resistant roj hmab" polyurethane tib lub sijhawm nrog lub siab elasticity ntawm roj hmab thiab lub rigidity ntawm cov yas.
* Cov ntaub ntawv Polyurethane muaj lub zog polarity, uas ua rau lawv muaj peev xwm sib txuas nrog feem ntau cov ntaub ntawv thiab tuaj yeem siv ua cov nplaum hauv thaj teb sib txuas.
* Cov nplaum Polyurethane feem ntau yog siv rau hauv kev ntim khoom, kev tsim kho, ntoo, tsheb, thiab kev lag luam khau.
Cov khoom siv Polyurethane (PU) ua li cas?
Vim yog qhov muaj zog hydrophobicity ntawm polyurethane, yuav tsum siv txoj kev tsim tshiab los npaj PU emulsion, cov txheej txheem tsim cov dej polyurethane yog raws li nram no: ① los ntawm oligomer polyol, saw extender, diisocyanate los tsim cov molecular loj ntawm PU pre-polymer; ② neutralized tom qab pre-polymer emulsified hauv dej los tsim cov dispersion.
Cov txheej txheem npaj emulsion polyurethane muaj ob pawg tseem ceeb: txoj kev emulsification sab nraud thiab txoj kev emulsification sab hauv.
1. Txoj kev emulsification sab nraud yog txoj kev yuam emulsification nyob rau hauv lub xub ntiag ntawm emulsifier, high shear.
2. Txoj kev ua kom nws tus kheej emulsification yog ua los ntawm kev qhia cov pab pawg hydrophilic rau hauv cov pob txha molecular ntawm polyurethane.
Cov pab pawg hydrophilic raug qhia rau hauv PU molecular pob txha los ntawm kev nthuav dav ntawm cov hydrophilic monomers, uas yog tsim los ntawm cov pab pawg tsim ntsev thiab cov tshuaj reagents tsim ntsev.
Kev siv dua yas polyurethane (PU)
- Kev Siv Dua Yas Polyurethane (PU) Muaj peev xwm muab faib ua kev siv dua lub cev thiab tshuaj lom neeg.Kev siv dua tshiab ntawm lub cev muab ib txoj hauv kev zoo thiab pheej yig rau kev siv dua tshiab ntawm cov polyurethane ua npuas ncauj thiab cov khoom sib xyaw. Qhov loj me ntawm cov khoom ua npuas ncauj polyurethane thawj zaug raug txo kom tsawg dua li tus qauv uas tuaj yeem rov ua dua hauv cov txheej txheem thib ob. Cov khoom siv rov ua dua tshiab pov tseg, lossis cov khoom txiav los ntawm cov txheej txheem tsim khoom, raug rhuav tshem mus rau hauv cov ntawv muaj txiaj ntsig zoo dua xws li flakes, granules lossis hmoov.Kev siv tshuaj lom neeg rov ua dua tshiab yog txoj kev rhuav cov polyurethane ua npuas dej rau hauv cov khoom siv polyurethane lossis lwm cov khoom siv tshuaj lom neeg siv alcoholysis, amineysis, hydrolysis lossis pyrolysis. Polyurethane ua npuas dej muaj urethane thiab urea bonds. Hauv cov txheej txheem ntawm alcoholysis, aminolysis thiab alkali hydrolysis, cov urethane thiab urea bonds hauv polyurethane molecule raug rhuav tshem thiab decomposed rau hauv polyols, aromatic polyamines, carbon dioxide thiab lwm yam.
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