I. Txheej txheem cej luam ntawm cov khoom siv roj hmab foamed

Cov khoom siv roj hmab ua npuas ncauj yog tsim los ntawm lub cev lossis tshuaj foaming txoj kev nrog roj hmab ua cov khoom siv hauv paus kom tau txais cov ntaub so ntswg zoo li roj hmab ntxeem tau cov qauv khoom. Cov cuab yeej no tau siv dav hauv ntau qhov kev lag luam, xws li tsheb qhov rooj thiab qhov rai ntsaws ruaj ruaj, cushioning pads, lub tsev siv gaskets, seismic cov ntaub ntawv, cov chaw tiv thaiv kev ua si, thiab lwm yam.

1 、 Lub tswvyim ntawm foamed roj hmab

Lub thiaj li hu ua foamed roj hmab kuj yog dav hu ua roj hmab foaming tshuab, yog siv cov foaming agent los kho cov roj hmab, kom cov roj hmab muaj cov yam ntxwv ntawm kev ua haujlwm. Cov tshuab no tau siv dav dua hauv kev tsim khoom tam sim no, yog txoj kev siv ntau tshaj plaws ntawm kev ua haujlwm ntawm theem no.

2 、 Kev faib tawm ntawm cov khoom siv roj hmab foamed

Foamed roj hmab cov khoom tam sim no yog ib qho ntawm cov khoom siv tshaj plaws hauv kev tsim khoom, uas tuaj yeem muab faib ua ob hom microporous qauv thiab cov qauv ntxeem tau raws li qhov pores. Thiab cov qauv microporous tuaj yeem muab faib ua cov khoom foaming cais thiab cov khoom lag luam foaming tas li. Raws li cov khoom siv raw ntawm cov roj hmab tuaj yeem muab faib ua cov khoom no rau hauv cov khoom siv roj hmab ntuj, cov khoom siv isoprene foaming, SBR foaming khoom, ethylene propylene roj hmab foaming khoom, thiab lwm yam.

Thib ob, ua npuas ncauj cov khoom siv roj hmab nrog kev tshuaj xyuas

Foamed roj hmab cov khoom yog ntau thiab ntau lug siv nyob rau hauv lub neej tam sim no, nws ntau lawm thiab ntau lawm txheej txheem thiab thermoplastic foaming muaj lub ntiaj teb no sib txawv, nws muaj ib tug vulcanization cross-linking ceev thiab ceev ntawm decomposition ntawm tus neeg sawv cev foaming kom phim qhov teeb meem. Qhov ntawd yog hais tias, cov khoom siv roj hmab ua tau zoo foaming ntxiv rau qhov kev sib txuas ntawm qhov sib txuas ntawm qhov sib txuas ntawm cov txheej txheem vulcanization ntawm cov ntaub ntawv roj hmab thiab cov decomposition ntawm cov tshuab tshuab tshwm sim thaum lub hauv paus ntsiab lus yog tib yam, yog qhov txuas ntxiv ntawm phab ntsa roj los tsim cov txheej txheem sib thooj.

1 、 Kev xaiv ntawm cov khoom tseem ceeb

Hauv kev tsim cov txheej txheem, feem ntau xav tau lub hom phiaj tshwj xeeb ntawm cov khoom siv los xaiv cov khoom siv hluav taws xob hauv lub cev, cov ntaub ntawv no hauv kev xaiv cov mos mos, nruab nrab lub zog, zoo elasticity ntawm cov khoom siv roj hmab ntuj, tab sis kuj xaiv qee cov roj hmab dag kom tau raws li qhov xav tau ntawm cov khoom. Rau zus tau tej cov roj-resistant ua npuas ncauj cov khoom, ntxiv rau qhov yuav tsum tau xaiv ib tug tsim nyog scientific nitrile roj hmab, tab sis kuj yuav soj ntsuam qhov feem thiab kev sib raug zoo ntawm neoprene, thiab txawm yuav ua tau raws li cov kev xav tau ntawm ib co tshwj xeeb cov khoom, koj kuj siv tau ob los yog ntau hom roj hmab thiab daim ntawv.

2 、 Kev xaiv ntawm tus neeg sawv cev foaming

Foaming tus neeg sawv cev yog qhov tseem ceeb tshaj plaws txuas hauv tag nrho cov khoom ntawm cov roj hmab foamed, thiab nws cov kev xaiv yog ze ze rau qhov ua tau zoo thiab kev ua haujlwm zoo. Feem ntau hais lus, qhov kev ua tau zoo ntawm cov khoom foaming yuav tsum xaiv ib tus neeg saib xyuas thiab tsim nyog foaming, thiab tus nqi ntawm foaming agent, kev siv cov txheej txheem kom tau raws li cov kev cai ntawm kev loj hlob tam sim no. Tam sim no, lub tshuab tshuab tshuab feem ntau muaj cov tshuab tshuab tshuab thiab cov tshuab tshuab tsis zoo ob. Cov tshuab tshuab inorganic feem ntau yog hais txog sodium bicarbonate, ammonium bicarbonate, urea, thiab lwm yam. Cov tshuab tshuab no muaj qhov zoo ntawm kev ceev decomposition ceev thiab tsis kub hauv daim ntawv thov, theoretically nws foaming kev ua tau zoo kuj zoo dua. Raws li cov roj uas tsim los ntawm cov thev naus laus zis no hauv daim ntawv thov feem ntau yog carbon dioxide thiab ammonia, thiab lwm yam, muaj cov pa roj carbon monoxide ua rau cov qauv roj hmab muaj qhov loj permeability coefficient, nws yog ib qho nyuaj los tsim ib lub qhov kaw ua npuas ncauj roj hmab, tsim cov npuas roj hmab tsis zoo, tsis tshua muaj zog, shrinkage, yooj yim deformation, yog li nws yog ib qho yooj yim heev rau siv ib leeg hauv kev ua hauj lwm, thiab feem ntau siv tau ua npuas ncauj ua npuas ncauj.

Kev ua haujlwm tam sim no, peb feem ntau siv foaming tus neeg sawv cev feem ntau muaj nitrogen dicarbonamide, nitroso, dibenzosulfonyl hydrazide ether, thiab lwm yam.. Cov ntaub ntawv no nyob rau hauv daim ntawv thov ntawm nws decomposition kub yog hais txog 200 ℃ los yog ntau tshaj, thiab nyob rau hauv cov txheej txheem ntau lawm kuj yuav tsum tau ntxiv lwm yam auxiliary tshuab tshuab, xws li urea, magnesium oxide, zinc com decomposition zoo heev, thiab lwm yam. uas ua rau muaj nitrogen, carbon dioxide, ammonia, thiab lwm yam., cov roj no tsis tsuas yog tsis muaj tshuaj lom, tsis muaj ntxhiab, thiab txawm tias muaj qhov zoo ntawm tsis ua paug ib puag ncig, tsis muaj xim. Qhov pore loj ntawm cov khoom siv roj hmab ua npuas ncauj yog qhov loj dua, thiab tus nqi shrinkage kuj loj dua; Thaum siv tus neeg sawv cev foaming, tus neeg sawv cev ua npuas dej muaj stearic acid, alum, thiab lwm yam, uas tuaj yeem txo qhov kub ntawm tus neeg sawv cev foaming mus rau 130 ~ 150 ℃ tom qab ntxiv.

3, kev xaiv ntawm vulcanization system

Vulcanization system yog ib qho tseem ceeb heev nyob rau hauv cov txheej txheem tshawb fawb ntawm cov khoom foaming, ua ntej ntawm tag nrho cov, seb qhov sib txuam ntawm vulcanization system thiab foaming system yog tus yuam sij rau kev ua tau zoo ntawm cov khoom foaming. Cov roj hmab tuaj yeem ua tiav foamed, qhov tseem ceeb tshaj plaws yog cov txheej txheem vulcanization ntawm cov roj hmab thiab cov txheej txheem decomposition ntawm foaming tus neeg sawv cev yuav tsum tau pib synchronized, los yog sulfur lub sij hawm tshaj lub sij hawm foaming me ntsis tom ntej. Yog li ntawd, tom qab xaiv lub vulcanization system, kho cov foaming system kom phim nws, los yog tom qab xaiv lub foaming system, kho cov vulcanization system kom phim nws.

4 、 Kev xaiv ntawm kev txhawb nqa muab tub lim

Cov pa roj carbon dub, silica thiab lwm cov khoom siv txhawb zog tuaj yeem txhim kho lub zog thiab nruj ntawm cov khoom siv roj hmab foamed, qhov tsim nyog ntxiv ntawm calcium carbonate, av nplaum thiab lwm cov khoom ntxiv tuaj yeem txhim kho kev ua haujlwm ntawm cov roj hmab thiab txo cov nqi. Cov pa roj carbon dub yuav tsum xaiv ib nrab siv zog FEF thiab SRF carbon dub, muab tub lim yuav tsum xaiv lub teeb calcium carbonate, av nplaum, thiab lwm yam., tus nqi yuav tsum tsis txhob ntau dhau, nyiam dua 20 mus rau 40 daim ntawv.

5 、 Kev xaiv ntawm plasticizer

Plasticizer yuav tsum muaj: zoo plasticizing nyhuv, tsawg npaum li cas, ceev nqus tus nqi, zoo compatibility nrog roj hmab, me me volatility, tsis muaj tsiv teb tsaws, tsis muaj tshuaj lom, tsis muaj ntxhiab, pheej yig thiab yooj yim kom tau. Plasticizer tuaj yeem txhim kho qib ntawm kev tawg ntawm tus neeg sawv cev sib xyaw, kev ua haujlwm thiab molding ntawm cov roj hmab sib xyaw. Ua npuas ncauj roj hmab cov khoom uas yuav tsum tau ua npuas ncauj multiplier, feem ntau ntawm cov plasticizer ntxiv yog loj, thiab xaiv ib tug zoo compatibility nrog roj hmab plasticizer.

6 、 Kev xaiv ntawm antioxidant

Cov khoom ua npuas ncauj roj hmab rau cov qauv ntxeem tau, thaj chaw saum npoo yog loj dua, yooj yim rau kev laus, yuav tsum tau ua ke nrog cov tshuaj antioxidants. Lub hauv paus ntsiab lus ntawm kev xaiv antioxidant yog ob qho tib si zoo los tiv thaiv kev laus, tab sis kuj tsis cuam tshuam rau qhov decomposition ntawm tus neeg sawv cev foaming. Muaj peev xwm xaiv 4010, 264, MB thiab lwm yam tshuaj tiv thaiv kab mob, tus nqi ntau dua li cov khoom siv roj hmab dav dav.

7, lub hauv paus ntsiab lus ntawm roj hmab foaming

Cov khoom siv roj hmab foaming ntau lawm ntawm cov roj hmab daim txhuam cev, lub hauv paus ntsiab lus yog ntxiv foaming tus neeg sawv cev rau hauv cov roj hmab xaiv los yog rov ntxiv foaming tus neeg sawv cev, qhov decomposition ntawm foaming tus neeg saib xyuas nyob rau hauv lub vulcanization kub kom tso pa roj, surrounded los ntawm roj hmab los ua ib tug npuas npuas 'kom cov roj hmab expansion los tsim ib daim txhuam cev.

Lub ntsiab yam tseem ceeb uas txiav txim siab thiab cuam tshuam cov qauv ntawm cov npuas pore yog: tus nqi ntawm lub tshuab nqus tsev vacuum gas, cov roj diffusion tus nqi hauv cov roj hmab, viscosity ntawm cov roj hmab thiab qhov ceev ntawm vulcanization, qhov tseem ceeb tshaj plaws yog qhov sib txuam ntawm tus nqi ntawm cov tshuab tshuab hluav taws xob, qhov ceev ntawm cov roj tsim thiab qhov ceev ntawm vulcanization ntawm cov roj hmab.

Txhawm rau ua kom cov khoom siv roj hmab zoo dua, kev xaiv ntawm hom tshuab tshuab thiab cov roj hmab vulcanization system yog qhov tseem ceeb. Muaj ob txoj hauv kev tshwj xeeb:

Ua ntej, raws li qhov kub ntawm vulcanization los xaiv qhov decomposition kub thiab qhov tsim nyog tshuab tus neeg sawv cev, thiab tom qab ntawd raws li lub decomposition ceev ntawm tus neeg sawv cev tshuab hauv vulcanization kub los kho cov vulcanization ceev ntawm cov roj hmab, xws li kev siv cov kev txhawb nqa lig thiab lwm yam kev txhawb nqa thiab vulcanization system, tuaj yeem siv los kho tus nqi txhawb los kho cov vulcanization ceev.

Qhov thib ob, nyob rau hauv cov ntaub ntawv ntawm vulcanization system los txiav txim qhov ceev ntawm vulcanization, raws li kev xaiv ntawm foam ntau yam thiab haum particle loj. Qhov loj me me ntawm tus neeg sawv cev tshuab yog ib qho tseem ceeb tshaj plaws hauv kev txiav txim siab qhov nrawm nrawm ntawm tus neeg sawv cev tshuab. Qhov loj me me zuj zus, qhov tshwj xeeb ntawm thaj chaw ntawm cov khoom nce ntxiv, kev hloov pauv hluav taws xob nce ntxiv, thiab qhov nrawm nrawm nrawm dua, yog li qhov sib npaug ntawm qhov nrawm nrawm ntawm cov tshuab tshuab thiab cov vulcanization ceev ntawm cov roj hmab tuaj yeem hloov kho los ntawm kev xaiv qhov loj me me ntawm cov tshuab tshuab.

Peb, kev siv tshuab

1. Plasticizing

Lub ntsiab ntawm plasticizing raw roj hmab yog ua kom tawg thiab rhuav tshem cov macromolecular saw ntawm roj hmab. Txhim kho cov yas ntawm cov roj hmab, kom cov txheej txheem sib xyaw thiab sib xyaw ntawm cov neeg sawv cev sib xyaw ua haujlwm yooj yim dua. Hauv kev npaj cov khoom siv roj hmab ua npuas ncauj, qhov zoo dua cov yas ntawm cov roj hmab, qhov yooj yim dua nws yog ua cov khoom nrog cov npuas npuas qhov sib txawv, me me ntom thiab me me shrinkage tus nqi. Yog li ntawd, cov roj hmab nyoos yuav tsum tau ua tiav plasticized.

2. Kev cia khoom

Tom qab cov roj hmab sib xyaw, nws yuav tsum tau muab tso rau lub sijhawm ntev txaus, feem ntau 2 ~ 4h, kom ntau yam khoom ntxiv tau tawg mus rau hauv cov roj hmab sib tov. Qhov sib npaug ntawm cov roj hmab additives yog dispersed, qhov zoo dua qhov ruaj khov ntawm cov khoom loj, qhov smoothness ntawm qhov chaw thiab qhov sib xws ntawm cov npuas.

3. Kub

Roj hmab ua npuas ncauj yog rhiab heev rau qhov kub thiab txias. Cov khoom siv roj hmab tib yam muaj qhov sib txawv foaming los ntawm qhov sib txawv ntawm qhov kub thiab txias. Vim tias cov txheej txheem foaming thiab vulcanization system yog rhiab rau qhov kub thiab txias sib txawv, hloov qhov kub ntawm vulcanization yuav kho qhov teeb meem ntawm kev sib piv cov vulcanization system nrog lub foaming system.

4. Kev tsim

Cov txheej txheem molding ntawm foamed roj hmab cov khoom yog: extrusion molding, molding, ca molding, thiab lwm yam. EPDM foamed khoom yog feem ntau siv nyob rau hauv extrusion molding, thiab NBR feem ntau yog siv nyob rau hauv molding.