Ua npuas dej viscoelastic (VE ua npuas dej), tseem hu ua ua npuas nco, yog cov khoom siv polyurethane ua haujlwm siab uas siv dav hauv cov txaj pw, cov hauv ncoo, cov rooj zaum hauv tsheb, thiab cov khoom siv hauv kev lag luam. Nws cov yam ntxwv tshwj xeeb - rov qab qeeb thiab lub cev zoo li lub cev los ntawm cov txheej txheem tshuaj polyurethane uas tswj hwm zoo - thiab lub plawv ntawm cov txheej txheem no yogpolyurethane catalyst.
Nkag Siab Txog VE Ua Npuas Ncauj Thiab Nws Cov Khoom Tsim Tawm
VE ua npuas ncauj yog tsim los ntawm kev ua haujlwmcov polyolsnrogcov isocyanatesnyob rau hauv qhov muaj dej, cov neeg sawv cev ua pa, surfactants, thiabcov tshuaj polyurethane catalystsCov tshuaj tiv thaiv no tsim cov qauv cellular uas sib xyaw ua ke kev ywj pheej nrog kev nqus zog.
Tus yuam sij rau kev tsim cov ua npuas dej VE zoo yog tswj ob qho kev cuam tshuam tseem ceeb:
- Kev ua xua gelling- Cov tshuaj tiv thaiv ntawm polyols thiab isocyanates, uas tsim cov polyurethane polymer network.
- Kev ua xua tshuab- Qhov kev sib xyaw ntawm dej thiab isocyanates, uas tso tawm CO₂ roj los tsim cov hlwb ua npuas ncauj.
Yog tsis muaj kev tswj hwm meej rau cov kev tshuaj tiv thaiv no, qhov ceev ntawm cov ua npuas ncauj, qhov mos, lub sijhawm rov zoo, thiab qhov ruaj khov tuaj yeem sib txawv, ua rau kev ua haujlwm tsis sib xws.
Lub Luag Haujlwm ntawm Polyurethane Catalysts
Cov tshuaj polyurethane catalystsua kom sai thiab sib npaug cov tshuaj gelling thiab blowing reactions, uas tso cai rau cov chaw tsim khoom kom ua tiav cov qauv cell thiab cov khoom siv lub cev uas xav tau rau VE ua npuas ncauj. Cov catalysts no tuaj yeem faib ua ob hom:
- Cov tshuaj amine catalysts- Feem ntau txhawb nqa qhov kev ua kom tshuab, cuam tshuam rau qhov ua npuas ncauj mos, cov ntsiab lus qhib-cell, thiab cua ntsawj.
- Cov tshuaj catalysts hlau- Feem ntau txhawb nqa cov tshuaj tiv thaiv gelling, cuam tshuam rau kev ua npuas ncauj ruaj khov, lub zog tensile, thiab kev ruaj khov.
Hauv kev tsim cov ua npuas ncauj VE, kev sib xyaw ua ke ntawm amine thiab hlaucov tshuaj polyurethane catalystssiv los kho qhov profile ntawm cov tshuaj tiv thaiv.
Lub Ntsiab Cai ntawm Catalyst Function hauv VE Foam
Lub hauv paus ntsiab lus tom qab siv cov tshuaj polyurethane catalysts hauv VE ua npuas ncauj ntau lawm yog raws likev xaiv ua kom nrawm duaCov tshuaj catalysts sib txawv muaj cov affinities sib txawv rau cov tshuaj sib txuas uas koom nrog hauv ob qho kev tshuaj tiv thaiv tseem ceeb. Los ntawm kev xaiv cov tshuaj catalyst sib xyaw thiab cov koob tshuaj kom raug, cov chaw tsim khoom tuaj yeem:
- Tswj lub sijhawm sawv- Tiv thaiv kom tsis txhob tawg thiab ua kom cov npuas dej nthuav dav zoo ib yam.
- Tswj cov qauv ntawm tes- Ua tiav qhov tsim qauv qhib-cell tseem ceeb rau kev rov zoo qeeb thiab ua pa tau.
- Kev sib npaug ntawm qhov mos thiab kev txhawb nqa- Zoo-tuning ua npuas ncauj compression modulus rau kev nplij siab thiab durability.
- Txhim kho qhov sib xws- Txo qhov sib txawv ntawm ib pawg mus rau ib pawg kom zoo dua.
Piv txwv li, hauv cov ua npuas ncauj nco, qhov tshuaj tiv thaiv gelling qeeb me ntsis nrog kev sib npaug ntawm lub tshuab pab tsim cov nyhuv qeeb qeeb, thaum tiv thaiv kev kub ntau dhau thaum lub sijhawm kho.
Cov Yam Cuam Tshuam Rau Kev Xaiv Catalyst
Thaum xaiv ib qhopolyurethane catalystrau VE ua npuas ncauj, cov chaw tsim khoom xav txog:
- Ua npuas ncauj ceevthiab cov kev cai ntawm qhov nyuaj.
- Kev ceev ntawm cov tshuaj tiv thaivxav tau rau txoj kab ntau lawm (txuas ntxiv piv rau pawg).
- Cov qauv VOC thiab ntxhiab tswrau cov khoom siv nplij siab.
- Kev Sib Haum Xeebnrog lwm yam khoom ntxiv, xws li cov tshuaj tiv thaiv hluav taws lossis cov xim.
- Cov cai ib puag ncig— xaiv cov kev xaiv catalyst uas tsis muaj pa phem ntau, thiab ruaj khov.
Cov txiaj ntsig ntawm Optimized Catalyst Systems hauv VE Foam
Ib qho zoo optimizedpolyurethane catalystlub kaw lus tuaj yeem xa khoom:
- Kev nplij siab thiab kev txo qhov siab zoo dua.
- Lub neej ua npuas dej ntev dua thiab lub zog ua kom ntev dua.
- Txo cov qhov tsis zoo xws li cov voids lossis shrinkage.
- Ua raws li cov cai ib puag ncig thiab kev nyab xeeb.
- Kev ua haujlwm tau zoo dua thiab txo cov khib nyiab.
Xaus lus
Kev tsim khoom ntawmua npuas dej viscoelasticxav tau ntau tshaj li cov khoom siv raw zoo xwb - nws xav tau kev tswj tshuaj kom meej, thiabcov tshuaj polyurethane catalystsyog qhov tseem ceeb rau kev ua tiav nws. Los ntawm kev nkag siab txog cov ntsiab cai ntawm kev ua haujlwm catalyst thiab xaiv cov khoom sib xyaw kom raug rau VE ua npuas ncauj daim ntawv thov, cov chaw tsim khoom tuaj yeem ua kom muaj qhov zoo sib xws, kev ua tau zoo dua, thiab kev sib tw zoo dua hauv kev ua lag luam.
Yog koj tab tom nrhiavCov tshuaj catalysts polyurethane ua tau zoo heevrau VE ua npuas ncauj ntau lawm, peb pab neeg ua haujlwm tuaj yeem muab cov kev daws teeb meem tshwj xeeb kom tau raws li koj cov txheej txheem thiab cov khoom xav tau.
Lub sijhawm tshaj tawm: Lub Yim Hli-14-2025