Muaj ntau yam xwm txheej thiab teeb meem tshwm sim hauv cov khoom ua npuas ncauj tiag tiag, thiab kev tsim khoom ntawm txhua qhov xwm txheej yog tshwm sim los ntawm ntau yam.
Hauv kev soj ntsuam kev sib tsoo tshwm sim los ntawm cov teeb meem nyuaj, feem ntau nyuaj rau sau tag nrho cov kev cuam tshuam thiab cov ntsiab lus tseem ceeb uas ua haujlwm tiag tiag. Hauv qab no yog cov ntsiab lus ntawm qee qhov xwm txheej uas nquag ntsib thiab lawv cov laj thawj.
1. Coke (qhov kub ntawm qhov chaw tshuaj tiv thaiv ntau tshaj qhov kub ntawm cov khoom siv los tiv thaiv oxidation)
(1) Muaj teeb meem nrog qhov zoo ntawm polyether polyols: thaum lub sij hawm tsim khoom, khaws cia thiab kev thauj mus los, cov ntsiab lus ntawm cov dej hauv cov khoom tshaj li tus qauv, cov ntsiab lus ntawm peroxides thiab boiling impurities yog siab heev, cov concentration ntawm hlau. ions siab dhau lawm, thiab hom thiab concentration ntawm antioxidants tsis tsim nyog;
(2) Formula: Nyob rau hauv cov mis nyuj uas tsis tshua muaj siab, TDI Performance index yog siab dhau lawm, qhov feem pua ntawm cov dej thiab lub cev foaming tus neeg sawv cev nyob rau hauv lub foaming tus neeg saib xyuas yog tsis tsim nyog, lub cev foaming tus neeg saib xyuas yog me me, thiab cov dej ntau dhau lawm;
(3) Kev nyab xeeb kev nyab xeeb: kub kub nyob rau lub caij ntuj sov, qeeb cua sov dissipation, siab cov khoom kub, huab cua siab, thiab qhov kub ntawm cov tshuaj tiv thaiv qhov chaw tshaj qhov kub ntawm anti-oxidation;
(4) Kev cia khoom tsis raug: Thaum TDI qhov ntsuas tau nce, cov khoom siv hluav taws xob ntau ntxiv thaum lub sij hawm tom qab kho, ua rau muaj qhov nce hauv qhov kub thiab txias.
2. Loj compression deformation
(1) Polyether polyols: kev ua haujlwm tsawg dua 2.5, qhov feem pua ntawm ethylene oxide yog ntau dua 8 feem pua, muaj ntau yam me me molecular, thiab cov degree ntawm unsaturation ntau dua 0.05mol/kg;
(2) Cov txheej txheem txheej txheem: qhov kub ntawm cov tshuaj tiv thaiv qhov chaw qis dhau los yog siab dhau, qhov kev kho tom qab tsis zoo, cov tshuaj tiv thaiv tsis tiav lossis muaj coke ib nrab;
(3) Cov qauv siv thev naus laus zis: TDI qis dhau qhov ntsuas, ntau dhau stannous octoate ntawm silicone roj, tsis muaj npuas cua thiab siab kaw ntawm tes.
3. Cov npuas dej yog mos heev (qhov hardness txo qis hauv tib qhov ntom)
(1) Polyether polyol: kev ua haujlwm qis, qis hydroxyl tus nqi, thiab loj txheeb ze molecular loj;
(2) Cov txheej txheem thev naus laus zis: tus nqi ntawm stannous octoate yog me me, cov tshuaj tiv thaiv gel qeeb qeeb, thiab cov tin yog tib yam, cov dej me me, tus nqi ntawm lub cev foaming tus neeg sawv cev yog loj, kev ua ntawm silicone. roj yog siab, tus nqi yog loj, thiab TDI index tsawg.
4. Qhov pores loj
(1) Kev sib tov tsis zoo; qhov sib tov tsis sib npaug, thiab lub sij hawm milky dawb yog luv;
(2) Cov txheej txheem txheej txheem: tus nqi ntawm cov roj silicone yog qis dua qhov qis dua, cov nqi ntawm stannous octoate yog me me thiab kev ua haujlwm tsis zoo, thiab cov gelation ceev yog qeeb.
5. Siab tshaj qhov teeb tsa ceev
(1) Polyether polyol: kev ua haujlwm qis thiab siab txheeb ze molecular loj;
(2) Cov txheej txheem txheej txheem: tus nqi ntawm cov roj silicone yog qis dua qhov qis dua, TDI Performance index qis, thiab foaming Performance index tsawg;
(3) Kev nyab xeeb tej yam kev mob: tsis tshua muaj kub thiab cua siab.
6. Sib tsoo ua npuas ncauj qhov (gasing ceev yog ntau dua gel ceev)
(1) Polyether polyol: Cov kua qaub yog qhov hnyav tshaj tus qauv, muaj ntau yam impurities, kev ua haujlwm tsawg, thiab cov txheeb ze molecular hnyav;
(2) Cov txheej txheem txheej txheem: tus nqi ntawm amine ntau dua, cov tin tsawg dua, thiab TDI Performance index tsawg. Thaum tus nqi ntawm cov tin yog tib yam, qhov ntsuas TDI siab dhau lawm, cov roj hluav taws xob ceev ntau dua li cov gel ceev, lub cev pob txha muaj zog me me, thiab cov npuas dej tawg lossis cov qhov hauv zos tshwm.
1. Siab kaw ntawm tes tus nqi
(1) Polyether polyol: muaj feem ntau ntawm ethylene oxide thiab kev ua haujlwm siab, uas feem ntau tshwm sim hauv kev hloov ntawm polyether polyols nrog cov dej num sib txawv;
(2) Cov txheej txheem thev naus laus zis: tus nqi ntawm stannous octoate yog siab, kev ua haujlwm isocyanate siab, qhov kev sib txuas ntawm kev sib txuas yog qhov loj, thiab kev sib txuas sib txuas ceev ceev. Yog tias nws loj dhau lawm, nws tseem yuav ua rau lub cell kaw siab.
2. Shrinkage (gel ceev yog ntau dua foaming ceev)
(1) Lub kaw lus ntawm tes yog siab thiab ntsws thaum txias;
(2) Cov txheej txheem txheej txheem: tsis tshua muaj kub thiab cov khoom siv kub tsawg;
(3) Cov txheej txheem txheej txheem: roj silicone ntau dhau, tus neeg sawv cev ua npuas dej ntau dhau, thiab qhov ntsuas TDI qis.
3. Sab hauv fissure
(1) Cov txheej txheem txheej txheem: qhov kub thiab txias yog qhov tsawg, thiab qhov kub ntawm qhov chaw tshuaj tiv thaiv yog siab;
(2) Cov txheej txheem txheej txheem: qis TDI Performance index, ntau tin, thiab siab thaum ntxov foaming zog;
(3) Silicone roj muaj kev ua haujlwm siab thiab siv tsawg.
4. Capping (tsis sib npaug airgel ceev)
(1) Cov txheej txheem txheej txheem: tsis tshua muaj kub thiab cov khoom siv kub tsawg;
(2) Cov txheej txheem txheej txheem: tus nqi ntawm cov catalyst tsis txaus, tus nqi ntawm amine yog me me, thiab cov roj silicone zoo tsis zoo.
5. Cov kab nrib pleb hauv qab (qhov nyiaj ntawm amine ntau dhau, lub foaming ceev ceev heev)
Cov pores loj ntawm qhov chaw: Tus nqi ntawm lub cev foaming yog loj heev, thiab qhov zoo ntawm silicone roj thiab catalyst tsis zoo.
6. Kev ua haujlwm tsis zoo ntawm cov npuas dej tsis zoo
Qhov zoo ntawm polyether polyol tsis zoo, nrog tib tus nqi hydroxyl, kev ua haujlwm tsis zoo, qib siab ntawm unsaturation, thiab tib tus nqi ntawm cov tin, TDI index tsawg.
7. Qhov cua tsis zoo
(1) Kev nyab xeeb tej yam kev mob: tsis tshua muaj kub
(2) Cov khoom siv raw: siab polyether polyol, kev ua haujlwm siab ntawm silicone roj;
(3) Cov txheej txheem txheej txheem: ntau tin, los yog dej tsawg thiab cov ntsiab lus amine thaum tus nqi ntawm cov tin yog tib yam, thiab siab TDI Performance index.
8. Kev ua haujlwm tsis zoo
(1) Cov khoom siv raw: polyether polyol muaj kev ua haujlwm siab, me me txheeb ze molecular loj, thiab kev ua haujlwm siab ntawm cov roj silicone;
(2) Cov txheej txheem txheej txheem: cov roj silicone yog loj, tus nqi ntawm cov tin loj, thiab cov dej yog loj ntawm tib lub tin, thiab TDI Performance index siab.
1. Lub zog tensile tsis zoo
(1) Cov khoom siv raw: ntau dhau molecular polyether polyols thiab kev ua haujlwm qis nrog tib tus nqi hydroxyl;
(2) Cov txheej txheem txheej txheem: tsawg dua tin gel cov tshuaj tiv thaiv tsis zoo, ntawm tib tus nqi ntawm cov tin, TDI Performance index siab, thiab cov degree ntawm crosslinking yog tsawg nrog dej tsawg.
2. Haus luam yeeb thaum foaming
Tshaj amine txhawb cov tshuaj tiv thaiv ntawm cov dej thiab TDI kom tso tawm ntau cov cua sov, thiab cov khoom uas tsis tshua muaj boiling evaporate thiab emit pa luam yeeb. Yog tias nws tsis yog coke, cov pa luam yeeb feem ntau yog tsim los ntawm TDI, cov tshuaj uas tsis tshua muaj boiling thiab monomer naphthenes hauv polyether polyols.
3. Ua npuas ncauj nrog dawb tav
Lub foaming thiab gel cov tshuaj tiv thaiv ceev ceev, kev hloov ceev yog qeeb hauv qhov nruam foaming, thiab lub zos extrusion ua ib txheej tuab, uas ua rau cov phenomenon ntawm dawb streaks. Kev hloov ceev yuav tsum tau nce ntxiv hauv lub sijhawm, lossis cov khoom siv kub yuav tsum tau qis dua, thiab cov tshuaj catalyst yuav tsum tau txo.
4. Crispy ua npuas ncauj
Muaj ntau cov dej nyob rau hauv cov mis, cov biuret tsim yog feem ntau undissolved nyob rau hauv silicone roj, tin catalyst yog siv tsis zoo, cov tshuaj tiv thaiv cross-linking tsis txaus, cov ntsiab lus ntawm polyether polyol nrog me me txheeb ze molecular hnyav yog siab, cov tshuaj tiv thaiv. qhov kub thiab txias yog siab dhau, thiab qhov tawg ntawm ether bonds txo cov npuas lub zog. .
5. Lub npuas ntom ntom yog qis dua li cov nqi teev
Lub foaming Performance index loj dhau vim qhov ntsuas tsis raug, qhov kub thiab txias yog siab, thiab huab cua siab tsawg.
6. Cov npuas dej muaj hauv qab ntawm daim tawv nqaij, ntug ntawm daim tawv nqaij, hauv qab kauj ruam cavitation
Tsawg tin polyamine, qeeb foaming ceev, ceev gel ceev, thiab kub tsis tshua muaj nyob rau hauv nruam foaming.
7. Loj elongation
(1) Cov khoom siv raw: polyether polyol muaj kev ua haujlwm siab thiab ua haujlwm me me;
(2) Cov txheej txheem txheej txheem: qis TDI Performance index, tsis txaus hla kev sib txuas, ntau tin, thiab ntau cov roj silicone;
(3) Qhov kub thiab txias.
