Cov tshuaj ua npuas polyurethane txau (SPF) yog cov khoom siv rwb thaiv tsev uas siv tau ntau yam hauv kev tsim kho thiab lwm yam lag luam los tsim kom muaj ib txheej rwb thaiv tsev zoo thiab ruaj khov. Cov tshuaj SPF yog cov tshuaj sib xyaw ua ke, txhua yam ua lub luag haujlwm tseem ceeb hauv kev tsim cov npuas nrog cov khoom rwb thaiv tsev, kev ywj pheej thiab kev nplaum. Ua tus kws tshaj lij polyurethane catalyst, peb tsom mus rau kev txhawb nqa qhov kev teb zoo tshaj plaws thiab kev ua tau zoo ntawm SPF systems.
Cov Khoom Siv Polyurethane Ua Npuas Ncauj
Cov ua npuas dej polyurethane muaj ntau yam tseem ceeb uas ua haujlwm ua ke los ua ib lub npuas dej ruaj khov thiab zoo. Cov khoom tseem ceeb ntawm cov ua npuas dej polyurethane muaj xws li:
1. Cov Tshuaj Polyol Based:Cov tshuaj polyurethane no yog lub hauv paus ntawm cov qauv ua npuas ncauj, muab lub zog thiab elasticity. Feem ntau, polyether polyols raug siv vim tias lawv ruaj khov, pheej yig, thiab sib xws nrog lwm cov khoom ua npuas ncauj.
2. Cov tshuaj Copolymer Polyol (Copolyols):Cov tshuaj copolyols feem ntau raug ntxiv los txhim kho cov khoom tshwj xeeb, xws li kev ywj pheej, lub zog, thiab kev ruaj khov, kom ntseeg tau tias cov ua npuas dej ua haujlwm zoo nyob rau hauv ntau yam xwm txheej.
3.Isocyanate (TDI, TM20, lossis MDI):Cov isocyanates xws li Toluene Diisocyanate (TDI), Methylenediphenyl Diisocyanate (MDI), lossis cov qauv tshwj xeeb xws li TM20 yog qhov tseem ceeb rau cov tshuaj ua npuas ncauj. Lawv ua rau cov tshuaj polyols ua rau polyurethane thiab tsim cov pa roj carbon dioxide, uas ua rau cov qauv cellular ntawm cov npuas ncauj. Cov qauv cellular no muab SPF nws cov khoom rwb thaiv tsev thiab cushioning.
4. Dej:Hauv SPF, dej ua haujlwm ua tus neeg sawv cev uas cuam tshuam nrog isocyanate, tso tawm cov pa roj carbon dioxide uas pab nthuav cov ua npuas ncauj thiab tsim nws cov cellular matrix insulating. Rau cov ntawv thov tshwj xeeb, hydrofluoroolefins (HFOs) lossis lwm yam neeg sawv cev pab kuj tseem siv tau los ua kom tau raws li kev ua tau zoo lossis cov qauv ib puag ncig.
5. Cov tshuaj catalysts:Cov tshuaj catalysts ua lub luag haujlwm tseem ceeb hauv kev tswj hwm qhov ceev ntawm cov tshuaj tiv thaiv. Cov tshuaj catalysts xws liMXC-TthiabMXC-C15feem ntau siv rau hauv SPF, muab kev tswj hwm kev ua haujlwm uas ua kom muaj kev ua npuas ncauj zoo sib xws. MXC-T, paub txog qhov nkhaus teb du, thiab MXC-C15, uas txhawb nqa kev tsim urethane, yog qhov zoo tagnrho rau kev siv SPF ua haujlwm siab.
6.Cov tshuaj surfactants:Cov tshuaj surfactants tswj kev ruaj khov ntawm cov ua npuas ncauj, qhov loj ntawm cov cell, thiab tag nrho cov qauv, kom ntseeg tau tias cov ua npuas ncauj nthuav dav sib npaug. Cov tshuaj surfactants ua los ntawm silicone feem ntau siv vim lawv sib xws thiab ruaj khov nrog cov qauv polyurethane.
Lub Luag Haujlwm ntawm Catalysts hauv SPF
Cov tshuaj catalysts xws li MXC-T thiab MXC-C15 yog qhov tseem ceeb rau kev ua kom SPF ua haujlwm tau zoo, ua kom nws qhuav sai, nplaum tau zoo heev, thiab ua kom yooj yim siv. Cov tshuaj catalysts no pab kom lub npuas dej sib npaug thiab ua haujlwm tau zoo, ua rau SPF tsim tau cov khoom rwb thaiv tsev uas ruaj khov thiab siv tau ntev uas ua rau lub zog siv tau zoo, tiv taus dej noo, thiab ua kom cov qauv ruaj khov.
Cov khoom sib xyaw ua ke no ua rau SPF yog cov khoom siv rwb thaiv tsev zoo tshaj plaws uas ua tau raws li qhov xav tau ntawm kev siv hauv tsev, kev lag luam thiab kev lag luam. Ua cov kws tshaj lij hauv polyurethane catalysts, peb txhawb nqa kev tsim cov SPFS zoo uas muab kev ua haujlwm zoo thiab ruaj khov.
Lub sijhawm tshaj tawm: Kaum Ib Hlis-12-2024