Polyurethane yas (PU)
* Polyurethane (PU) yog cov ntawv luv ntawm polyurethane, polyisocyanate thiab polyhydroxy polymerization, yog nyob rau hauv cov saw tseem ceeb ntawm cov polymers uas muaj ntau qhov rov ua dua urethane saw ntu (-NHCOO-) ntawm cov khoom siv polymer.
* Customized PU khoom yas
Polyurethane, tseem hu ua polyurethane thiab polyurethane, yog ib chav kawm ntawm macromolecules uas muaj urethane yam ntxwv units hauv cov saw tseem ceeb. Cov khoom siv polymer no muaj ob qho tib si elasticity ntawm cov roj hmab thiab lub zog thiab kev ua haujlwm zoo ntawm cov yas, thiab muaj cov txiaj ntsig tseem ceeb hauv xya qhov loj ntawm plastics, roj hmab, ua npuas ncauj, fiber ntau, txheej, nplaum thiab ua haujlwm polymers. Industrially nws yog dav siv nyob rau hauv qis-ceev log tsheb, gaskets, tsheb mats thiab lwm yam teb. Nyob rau hauv lub neej txhua hnub, polyurethane yog siv los ua ntau yam ua npuas ncauj thiab yas sponge.
Koj tuaj yeem ua dab tsi nrog PU yas?
Polyurethane elastomers yog ib chav kawm ntawm cov khoom siv roj hmab thiab cov khoom yas, nrog lub zog tensile zoo, lub zog tsim kua muag, kev cuam tshuam tsis kam, tsis kam tiv taus, huab cua tsis kam, hydrolysis tsis kam, roj tsis kam thiab lwm yam zoo.
Feem ntau yog siv los ua cov khoom siv (xws li hoses, gaskets, siv, rollers, gears, kav, thiab lwm yam), insulators, khau khau thiab cov log tsheb. Piv txwv li, raws li ib tug mining sieve phaj, nws muaj qis suab nrov, siab permeability thiab hnav tsis kam tshaj cov tsoos hlau sieve phaj. Tsis tas li ntawd, polyurethane muaj biocompatibility zoo heev, raws li cov khoom siv biomedical, nws tuaj yeem siv rau hauv cov pacemakers, cov hlab ntsha, cov pob txha, thiab lwm yam.
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
- Textile thiab khaub ncaws
- Synthetic tawv
- Kev luam ntawv
- Petrochemical kev lag luam
- Kev ua kis las
- Kev kho mob
Polyurethane (PU) Cov yam ntxwv
* Polyurethane ua npuas ncauj tau muab faib ua 2 hom: ua npuas ncauj nruj thiab ua npuas ncauj yooj yim, nrog zoo elasticity, elongation, compression zog thiab yooj, nrog rau kev ruaj ntseg tshuaj zoo. Tsis tas li ntawd, polyurethane ua npuas ncauj muaj cov txheej txheem zoo heev, adhesion, rwb thaiv tsev thiab lwm yam khoom, muaj kev ua tau zoo ntawm cov khoom siv cushioning.
Polyurethane elastomer vim nws cov qauv muaj qhov muag muag, tawv 2 ntu ntu, yog li cov saw hlau molecular tuaj yeem tsim los muab cov khoom muaj zog, zoo toughness, hnav-resistant, roj-resistant thiab lwm yam khoom zoo heev, hu ua "wear-resistant. roj hmab" polyurethane tib lub sij hawm nrog lub siab elasticity ntawm cov roj hmab thiab lub rigidity ntawm cov yas.
* Cov ntaub ntawv polyurethane muaj cov polarity muaj zog, uas ua rau lawv muaj peev xwm ua kom ruaj khov nrog cov ntaub ntawv feem ntau thiab tuaj yeem siv los ua cov nplaum hauv kev sib txuas.
* Polyurethane adhesives yog siv rau hauv ntim, kev tsim kho, ntoo, tsheb, thiab khau kev lag luam.
Cov khoom siv Polyurethane (PU) ua li cas?
Vim muaj zog hydrophobicity ntawm polyurethane, yuav tsum tau siv ib txoj kev tshiab synthesis los npaj PU emulsion, cov txheej txheem synthesis ntawm waterborne polyurethane yog raws li nram no: ① los ntawm oligomer polyol, saw extender, diisocyanate los tsim ib tug siab txheeb ze molecular loj ntawm lub PU ua ntej-polymer; ② neutralized tom qab lub pre-polymer emulsified nyob rau hauv dej los tsim ib tug dispersion.
Polyurethane emulsion txoj kev npaj muaj ob pawg tseem ceeb: sab nraud emulsification txoj kev thiab sab hauv emulsification txoj kev.
1. Txoj kev emulsification sab nraud yog txoj kev yuam emulsification nyob rau hauv lub xub ntiag ntawm emulsifier, siab shear.
2. Txoj kev ua 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 tau nkag mus rau hauv PU molecular skeleton los ntawm kev nthuav dav ntawm cov hydrophilic monomers, uas yog tsim los ntawm cov ntsev-tsim pab pawg thiab ntsev-forming reagents.
Polyurethane (PU) yas recycling
- Polyurethane (PU) Yas Recycling tuaj yeem muab faib ua lub cev thiab tshuaj siv dua tshiab.Lub cev rov ua dua tshiab muab txoj hauv kev zoo thiab kev lag luam rau kev rov ua dua ntawm polyurethane rigid foams thiab composites. Tus thawj polyurethane ua npuas ncauj cov khoom me me yog thawj zaug txo qis rau tus qauv uas tuaj yeem rov ua dua hauv cov txheej txheem thib ob. Cov khoom siv pov tseg, lossis cov khoom siv los ntawm cov txheej txheem tsim khoom, yog degraded rau hauv cov ntaub ntawv muaj txiaj ntsig zoo xws li flakes, granules lossis hmoov.Kev siv tshuaj lom neeg yog cov txheej txheem ntawm kev rhuav tshem polyurethane foams rau hauv polyurethane raw cov ntaub ntawv los yog lwm yam chemical raw khoom siv alcoholysis, amineysis, hydrolysis los yog pyrolysis. Polyurethane ua npuas ncauj muaj urethane thiab urea bonds. Nyob rau hauv cov txheej txheem ntawm alcoholysis, aminolysis thiab alkali hydrolysis, urethane thiab urea bonds nyob rau hauv lub polyurethane molecule yog tawg thiab decomposed rau hauv polyols, aromatic polyamines, carbon dioxide thiab hais txog.
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