Yog polyurethane ua npuas ncauj yas?
Yog lawm,Polyurethane Ua Npuas Ncaujyog hom yas, tab sis nws yog ib daim ntawv tshwj xeeb ntawm polymer ua npuas ncauj uas muaj cov khoom tshwj xeeb thiab kev siv. Txhawm rau kom nkag siab tias yog vim li cas polyurethane ua npuas dej tau faib ua ntej, nws yuav pab tau thawj zaug yog thiab li cas polyurethane ua npuas dej haum rau cov pawg ntawm cov polymers.
Dab tsi yog yas?
Yas yog cov lus ntim cov khoom siv los piav qhia txog cov khoom siv hluavtaws uas tau tsim los ntawm cov polymers. Polymers yog molecules loj ua los ntawm kev rov ua dua cov chav kawm hu ua monomers, uas yog tshuaj lom ua ke. Cov plastics tuaj yeem yog pwm rau hauv ntau cov duab thiab cov ntaub ntawv thiab feem ntau siv rau lawv cov versatility, kav dej, thiab lub teeb yuag. Lo lus "yas" yog hais txog cov ntaub ntawv uas tuaj yeem ua cov khoom siv lossis pwm, feem ntau thaum lawv muaj rhaub lossis ua tiav.
Muaj ob lub ntsiab ntawm plastics:
Thermoplastics: Cov plastics no tuaj yeem ua kom sov thiab rov kho dua ntau zaus yam tsis tau hloov cov tshuaj tseem ceeb.
Thermosetting NPLAS: Cov plastics harden tas mus li tom qab ua puab thiab tsis tuaj yeem rov melted lossis rov kho dua.
Polyurethane Ua Npuas NcaujNtog nyob rau hauv qeb ntawm thowposetting yas, tab sis nws cov ntawv ua npuas ncauj muaj cov yam ntxwv sib txawv piv rau lwm cov khoom siv yas.
Dab tsi yog polyurethane ua npuas ncauj?
Polyurethane Ua Npuas Ncaujyog cov polymer uas ua los ntawm cov tshuaj lom neeg ntawm ob qho tseem ceeb: polyol (ib hom dej cawv) thiab oocyanate. Cov tshuaj tiv thaiv no ua cov qauv uas cov roj ntxiab roj lossis huab cua hauv nws, ua rau kev tsim kom ua npuas ncauj. Polyurethane ua npuas ncauj tuaj yeem sib txawv hauv qhov ntom ntom thiab cov qauv, ua rau muaj kev hloov pauv thiab cov roj rigid.
Saj zawg zog polyurethane ua npuas ncauj: Qhov no feem ntau siv hauv Cushions, daim txaj txaj, thiab rooj zaum tsheb. Nws muaj qhov qauv qhib-cell, txhais tau tias lub hlwb ntawm cov ua npuas ncauj yog sib cuam tshuam, cia huab cua thiab noo noo kom dhau los ntawm.
Rigid Polyurethane Ua Npuas Ncauj: Siv rau hauv cov ntaub ntawv rwb thaiv tsev, ntim, thiab kev tsim kho, qhov chaw uas lub hlwb kaw kom nruj, muab cov khoom rwb thaiv tsev zoo heev.
Vim li cas polyurethane ua npuas tsiaj yog suav hais tias yog yas
Polyurethane ua npuas dej tau faib ua Yas vim tias nws yog tsim los ntawm polymer chains uas yog cov khoom siv los ua cov khoom siv khov kho. Cov txheej txheem ntawm kev tsim polyurethane ua npuas ncauj muaj cov ntsiab lus yooj yim dua li cov qauv yas: cov polymerization ntawm monomers (polyol thiab isocyanate) los tsim ib tug loj, complex molecule.
1. Tshuaj Muaj Tshuaj
Polyurethane ua npuas ncauj yog cov polymer, ib yam li lwm hom plastics. Polyurethane nws tus kheej yog hom yas polymer uas tuaj yeem muaj nyob hauv ob peb daim ntawv, suav nrog cov foams, pleev xim, thiab elastomers. Qhov sib txawv ntawm polyurethane ua npuas ncauj thiab lwm yam plastics nyob rau hauv tus qauv ntawm cov roj av thiab cov kev qhia ntawm cov roj lossis huab cua rau hauv cov khoom siv, uas ua rau nws ua npuas dej. Txawm li cas los xij, ntawm nws cov tub ntxhais, polyurethane tseem yog yas, raws li nws muaj cov saw ntev ntawm monomers uas tau raug siv tshuaj sib txuas ua ke.
2. Cov yam ntxwv thermosetting
Polyurethane ua npuas ncauj yog lub thickosetting yas. Qhov no txhais tau tias ib zaug ua npuas ncauj tau tsim thiab kho tau, nws tsis tuaj yeem rov qab los yog rov kho dua. Cov tshuaj tiv thaiv tshuaj thaum lub sij hawm kho cov cross muaj zog sib txuas ntawm cov ntaub pua npab, muab cov npaus ua npuas dej. Qhov no yog cov thermosetting plastics, uas nyuaj rau mus tas li thiab feem ntau ntau dua cov cua sov-dassant dua li thermoplastics. Qhov tsis muaj peev xwm los kho lub npaus tom qab nws tau teeb tsa txuas ntxiv rau cov khoom siv yas hauv cov ntaub ntawv yas uas yauv hloov cov tshuaj ntsuab.
3. Cov khoom zoo ib yam li lwm yam plastics
Polyurethane ua npuas ncauj ua ke ntau ntawm cov qub zog uas yog cov khoom siv yas:
Yam ruaj khov: Polyurethane ua npuas ncauj yog muaj zog thiab tiv taus hnav, uas yog vim li cas nws yog vim li cas nws yog vim li cas nws siv nyob rau hauv cov ntawv thov cushioning thiab tsheb rooj zaum.
Kev rwb thaiv tsev: Rigid Polyurethane ua npuas dej yog ib qho zoo tshaj plaws cov tshuaj insulator, zoo sib xws rau lwm cov ntaub ntawv rwb thaiv tsev yas.
Lub teeb yuag: Txawm hais tias yog cov khoom siv khov kho, polyurethane ua npuas ncauj yog ntau dua li nws cov cim uas muaj ntau yam ntawm cov pa hluav taws xob hauv qab.
Cov qauv sib txawv ntawm polyurethane
Polyurethane yog cov khoom siv yas ntau ntxiv uas tuaj yeem tsim los ua cov khoom sib txawv. Thaum patyurethane ua npuas ncauj yog cov ua npuas ncauj tshwj xeeb ntawm polyurethane, cov khoom siv kuj tseem tuaj yeem siv lwm hom, xws li:
Polyurethane elastomers: Cov no yog hloov tau, xws li cov roj hmab zoo li plastics feem ntau siv hauv cov ntsaws ruaj ruaj, gaskets, thiab lub log.
Cov Khaub Ncaws Polyurethane Tsho: Siv los ua cov xim tha xim lossis ua tiav, polyurethane txheej ua rau cov chaw ruaj khov rau ntau yam khoom.
Polyurethane Npibs: Cov no yog siv hauv kev tsim kho, tshwj xeeb tshaj yog nyob rau hauv daim ntawv ntawm rwb thaiv tsev panels.
Thaum Polyurethane ua npuas ncauj yog ib hom yas, nws tsuas yog ib qho ntawm ntau yam uas polyurethane tuaj yeem noj. Lo lus "Yas" encompasses tag nrho cov ntawv no, suav nrog ob qho tib si foamed thiab tsis muaj cov variants ntawm polyurethane.
Ib puag ncig kev txiav txim siab
Zoo li lwm cov yas,Polyurethane Ua Npuas NcaujYuav muaj kev cuam tshuam ib puag ncig, tshwj xeeb thaum nws tawm los pov tseg. Polyurethane ua npuas dej, tshwj xeeb tshaj yog thaum siv nyob rau hauv rooj tog lossis kab txaj, feem ntau nyuaj rau nws cov qauv tshuaj sib xyaw ua ke thaum muaj kev tsim khoom. Tsis tas li ntawd, kev tsim cov polyurethane ua npuas ncauj muaj kev siv tshuaj lom li isocyanates, uas tuaj yeem ua rau muaj kev pheej hmoo txaus siab yog tias tsis daws tau zoo.
Nyob rau hauv xyoo tas los, kev siv zog tau tsim los tsim lwm txoj kev xaiv kom muaj cov polyurethane ua npuas, xws li cov khoom siv bio-raws li los ntawm cov khoom siv tshiab. Cov kev xaiv no npaj kom txo cov kev taug ib puag ncig ntawm polyurethane ua npuas dej ntau lawm thiab pov tseg.
Tag
Polyurethane Ua Npuas Ncaujyog, tseeb, ib hom yas. Nws yog tsim los ntawm polymerization ntawm cov tshuaj lom xws li polyols thiab isocyanates, sib sau cov saw ntev uas muab nws cov qauv thiab cov khoom.
Txawm hais tias nws yuav siv daim ntawv ua npuas dej, nrog pa lossis cua ua npuas ncauj sib qhia ntau yam ntxwv ntawm lwm cov yam ntxwv polymeric, thermosetting cov khoom, thiab versatility hauv cov ntawv thov. Thaum nws tus qauv ua npuas ncauj ua rau nws txawv ntawm cov ntaub ntawv yas, nws tus cwj pwm khov kho chaw thiab ua npuas dej khov kho nyob rau hauv qeb dav ntawm huab cua dav.