Ob Lub Txheej Txheem Txheej Txheem Silicone sealants muaj lub zog siab, muaj peev xwm ntawm cov kabmob loj, thiab tiv taus kev laus, qaug zog, thiab xeb, thiab muaj kev ua haujlwm ruaj khov nyob rau hauv lub neej kev cia siab.Lawv tsim nyog rau cov nplaum uas tiv taus kev sib txuas ntawm cov khoom siv.Nws yog tsuas yog siv rau kev sib txuas hlau, ceramics, plastics, roj hmab, ntoo thiab lwm yam ntaub ntawv ntawm tib yam los yog ntawm ntau yam ntaub ntawv, thiab muaj peev xwm hloov ib feem kev sib txuas cov ntaub ntawv xws li vuam, riveting thiab bolting.
Silicone structural sealant yog cov khoom siv tseem ceeb siv hauv cov zais zais lossis ib nrab zais thav duab iav kab hlau rhuav phab ntsa.Los ntawm kev sib txuas ntawm daim hlau thiab cov hlau thav duab, nws tuaj yeem tiv taus cua loads thiab iav nws tus kheej hnyav loads, uas yog ncaj qha ntsig txog kev ua haujlwm ntev thiab kev nyab xeeb ntawm lub tsev ntaub thaiv phab ntsa.Ib qho ntawm cov kev sib txuas tseem ceeb ntawm iav kab hlau rhuav phab ntsa kev nyab xeeb.
Nws yog cov txheej txheem sealant nrog linear polysiloxane ua cov khoom siv tseem ceeb.Thaum lub sij hawm kho, tus neeg sawv cev crosslinking reacts nrog lub hauv paus polymer los tsim cov khoom elastic nrog peb-dimensional network qauv.Vim tias Si-O daim ntawv cog lus lub zog hauv cov qauv molecular ntawm silicone roj hmab yog qhov loj hauv cov tshuaj sib txuas (Si- O cov khoom siv lub cev thiab tshuaj lom neeg: daim ntawv cog lus ntev 0.164 ± 0.003nm, thermal dissociation zog 460.5J / mol. Qhov tseem ceeb tshaj C-O358J / mol, C-C304J / mol, Si-C318.2J / mol), piv nrog lwm cov sealants (xws li polyurethane, acrylic, polysulfide sealant, thiab lwm yam), UV tsis kam thiab tsis kam Lub atmospheric laus muaj peev xwm muaj zog, thiab nws muaj peev xwm tswj tsis tau tawg thiab deterioration rau 30 xyoo nyob rau hauv ntau yam huab cua puag ncig.Nws muaj ± 50% tsis kam rau deformation thiab hloov chaw nyob rau hauv ntau qhov kub thiab txias.Txawm li cas los xij, nrog kev nce hauv kev siv cov khoom siv silicone sealants, ntau yam teeb meem yuav tshwm sim hauv cov ntawv thov, xws li: particle agglomeration thiab pulverization ntawm cov khoom B, kev sib cais thiab stratification ntawm cov khoom B, compression lub phaj tsis tuaj yeem nias los yog cov kua nplaum. tig dhau, cov kua nplaum tso zis ceev ntawm lub tshuab ua kua nplaum yog qeeb, cov kua nplaum ntawm daim ntawv npauj npaim muaj cov khoom, lub sij hawm ziab saum npoo yog ceev dhau los yog qeeb heev, cov kua nplaum zoo li tawv nqaij los yog vulcanization, thiab "paj kua nplaum" tshwm thaum lub sijhawm ua kua nplaum. ua txheej txheem.", lub colloid tsis tuaj yeem kho tau ib txwm, nplaum tes tom qab ob peb hnub ntawm kev kho, qhov nyuaj yog qhov txawv txav tom qab kho, muaj rab koob zoo li lub qhov hws ntawm qhov sib txuas nrog cov substrate, cov npuas npuas tau ntim rau hauv silicone sealant, kev sib txuas tsis zoo. nrog lub substrate, incompatibility nrog accessories, thiab lwm yam.
2.FAQ tsom xam ntawm Ob Cov Txheej Txheem Txheej Txheem Silicone nplaum
2.1 B ib feem muaj particle agglomeration thiab pulverization
Yog hais tias cov particle agglomeration thiab pulverization ntawm Cheebtsam B tshwm sim, muaj ob yog vim li cas: ib tug yog hais tias qhov no tshwm sim tau tshwm sim nyob rau hauv lub Upper txheej ua ntej siv, uas yog vim tsis zoo sealing ntawm lub pob, thiab tus neeg saib xyuas kev sib txuas los yog coupling tus neeg saib xyuas nyob rau hauv. Cheebtsam B yog Active compound, susceptible to noo noo nyob rau hauv cov huab cua, batch no yuav tsum tau xa rov qab mus rau lub chaw tsim tshuaj paus.Qhov thib ob yog tias lub tshuab raug kaw thaum siv, thiab particle agglomeration thiab pulverization tshwm sim thaum lub tshuab tig dua, qhia tias lub foob ntawm lub phaj siab ntawm lub tshuab kua nplaum thiab cov khoom siv roj hmab tsis zoo, thiab cov khoom siv. yuav tsum tau hu mus daws qhov teeb meem.
2.2 Qhov ceev ntawm lub tshuab ua kua nplaum yog qeeb
Thaum cov khoom siv thawj zaug, cov kua nplaum tso zis ceev ntawm lub tshuab gluing qeeb dhau thaum lub sij hawm gluing.Muaj peb qhov laj thawj: ⑴ tivthaiv A muaj cov dej tsis zoo, ⑵ lub phaj siab loj heev, thiab ⑶ qhov cua qhov siab tsis txaus.
Thaum nws txiav txim siab tias nws yog thawj qhov laj thawj lossis qhov laj thawj thib peb, peb tuaj yeem daws nws los ntawm kev kho lub siab ntawm rab phom kua nplaum;thaum nws tau txiav txim siab tias nws yog qhov laj thawj thib ob, xaj lub thoob nrog lub caliber sib xws tuaj yeem daws qhov teeb meem.Yog tias cov kua nplaum tso tawm qeeb qeeb thaum siv ib txwm siv, nws yuav yog qhov sib xyaw ua ke thiab cov ntxaij lim dej raug thaiv.Thaum pom, cov khoom siv yuav tsum tau muab ntxuav kom huv si raws sijhawm.
2.3 Lub sijhawm rub tawm nrawm dhau lossis qeeb dhau
Lub sij hawm tawg ntawm cov txheej txheem nplaum yog hais txog lub sij hawm nws yuav siv sij hawm rau lub colloid hloov los ntawm muab tshuaj txhuam mus rau lub cev elastic tom qab sib tov, thiab feem ntau nws yog kuaj txhua txhua 5 feeb.Muaj peb yam cuam tshuam rau kev ziab thiab kho ntawm cov roj hmab saum npoo av: (1) kev cuam tshuam ntawm qhov feem ntawm A thiab B Cheebtsam, thiab lwm yam .;(2) kub thiab av noo (qhov cuam tshuam ntawm qhov kub thiab txias yog qhov tseem ceeb);(3) cov qauv ntawm cov khoom nws tus kheej yog qhov tsis zoo.
Kev daws rau qhov laj thawj (1) yog kho qhov sib piv.Kev ua kom muaj kev faib ua feem B tuaj yeem txo lub sijhawm kho thiab ua rau cov nplaum txheej nyuaj thiab nkig;Thaum txo qhov kev faib ua feem ntawm curing tus neeg saib xyuas yuav ncua lub sij hawm kho, cov nplaum txheej yuav ua softer, lub toughness yuav tsum tau kho kom zoo thiab lub zog yuav nce.txo.
Feem ntau, qhov ntim piv ntawm cov khoom A: B tuaj yeem hloov kho ntawm (9 ~ 13: 1).Yog hais tias qhov kev faib ua feem B yog siab, cov tshuaj tiv thaiv ceev yuav nrawm dua thiab lub sijhawm tawg yuav luv dua.Yog tias qhov tshuaj tiv thaiv sai dhau, lub sijhawm rau kev txiav thiab tso tseg rab phom yuav raug cuam tshuam.Yog tias nws qeeb dhau, nws yuav cuam tshuam rau lub sijhawm ziab ntawm cov colloid.Lub sijhawm tawg feem ntau yog hloov kho ntawm 20 thiab 60 feeb.Qhov kev ua tau zoo ntawm colloid tom qab kho hauv qhov sib piv no yog qhov pib zoo ib yam.Tsis tas li ntawd, thaum qhov kev tsim kho kub siab dhau los yog qis dhau, peb tuaj yeem tsim nyog txo lossis nce qhov feem ntawm cov khoom siv B (kho tus neeg sawv cev), kom ua tiav lub hom phiaj ntawm kev kho qhov ziab thiab kho lub sijhawm ntawm cov colloid.Yog tias muaj teeb meem nrog cov khoom nws tus kheej, cov khoom yuav tsum tau hloov.
2.4 "Pob nplaum" tshwm nyob rau hauv tus txheej txheem ntawm gluing
Cov pos hniav paj yog tsim los ntawm kev sib xyaw tsis sib xws ntawm cov colloids ntawm A / B Cheebtsam, thiab nws zoo nkaus li cov kab dawb hauv zos.Cov laj thawj tseem ceeb yog: ⑴ Cov kav dej ntawm cov khoom B ntawm lub tshuab ua kua nplaum raug thaiv;⑵ Lub tshuab tov khoom zoo li qub tsis tau ntxuav tau ntev;⑶ Cov nplai yog xoob thiab cov kua nplaum tawm ceev tsis sib xws;Nws tuaj yeem daws tau los ntawm kev ntxuav cov khoom siv;rau qhov laj thawj (3), koj yuav tsum tau kuaj xyuas qhov sib npaug thiab ua kom haum.
2.5 Skinning los yog vulcanization ntawm cov colloid thaum lub sij hawm ua cov kua nplaum
Thaum ob lub nplaum nplaum yog ib feem kho thaum lub sij hawm sib tov, cov kua nplaum uas tsim los ntawm cov nplaum nplaum yuav tshwm sim tawv nqaij los yog vulcanization.Thaum tsis muaj qhov txawv txav ntawm qhov kev kho thiab cov kua nplaum tawm nrawm, tab sis cov kua nplaum tseem crusted los yog vulcanized, tej zaum yuav yog cov khoom siv tau raug kaw rau lub sijhawm ntev, cov phom nplaum tsis tau ntxuav los yog rab phom tsis tau. ntxuav kom huv si, thiab cov kua nplaum los yog vulcanized yuav tsum tau rinsed.Kev tsim kho tom qab ntxuav.
2.6 Muaj cov pa npuas hauv silicone sealant
Feem ntau hais lus, lub colloid nws tus kheej tsis muaj cua npuas, thiab cov huab cua npuas nyob rau hauv lub colloid zoo li yuav sib xyaw nrog huab cua thaum lub sij hawm kev thauj mus los los yog kev tsim kho, xws li: ⑴Cov pa tsis huv thaum lub thoob roj hmab hloov;⑵ Cov khoom yog nias rau ntawm lub phaj tom qab muab tso rau hauv lub tshuab Tsis nias, ua rau tsis tiav defoaming.Yog li ntawd, cov npuas dej yuav tsum tau muab tshem tawm kom huv si ua ntej siv, thiab lub tshuab ua kua nplaum yuav tsum tau ua kom raug thaum siv los xyuas kom meej sealing thiab tiv thaiv kom tsis txhob muaj cua nkag.
2.7 Tsis zoo adhesion rau substrate
Sealant tsis yog universal adhesive, yog li nws tsis tuaj yeem lav tau zoo nrog txhua qhov substrates hauv kev siv tswv yim.Nrog rau kev sib txawv ntawm substrate nto kho txoj kev thiab cov txheej txheem tshiab, kev sib txuas ceev thiab kev sib txuas ntawm cov sealants thiab substrates kuj txawv.
Muaj peb hom kev puas tsuaj rau kev sib txuas ntawm kev sib txuas ntawm cov txheej txheem nplaum thiab cov substrate.Ib qho yog cohesive puas, uas yog, cohesive force> cohesive force;lwm yam yog kev puas tsuaj, uas yog, cohesive force < cohesive force.Ib cheeb tsam kev puas tsuaj tsawg dua lossis sib npaug li 20% yog tsim nyog, thiab thaj tsam kev puas tsuaj ntau tshaj 20% tsis tsim nyog;thaj tsam kev puas tsuaj ntau dua 20% yog qhov tshwm sim tsis zoo hauv kev siv tswv yim.Tej zaum yuav muaj rau qhov laj thawj hauv qab no vim li cas cov txheej txheem nplaum tsis lo rau hauv substrate:
⑴ Lub substrate nws tus kheej yog qhov nyuaj rau kev sib cog lus, xws li PP thiab PE.Vim lawv cov molecular crystallinity siab thiab tsis tshua muaj qhov nro, lawv tsis tuaj yeem tsim cov saw hlau molecular diffusion thiab entanglement nrog rau feem ntau cov khoom, yog li lawv tsis tuaj yeem tsim cov ntawv cog lus muaj zog ntawm qhov sib cuam tshuam.Adhesion;
⑵ Cov khoom sib txuas ntawm cov khoom yog nqaim, thiab nws tsuas tuaj yeem ua haujlwm ntawm qee qhov substrates;
⑶ Lub sijhawm tu tsis txaus.Feem ntau, ob lub ntsiab lus nplaum yuav tsum tau kho tsawg kawg 3 hnub, thaum cov nplaum ib leeg yuav tsum tau kho rau 7 hnub.Yog hais tias qhov kub thiab av noo ntawm curing ib puag ncig yog tsawg, lub sij hawm kho yuav tsum tau ncua.
⑷ Qhov piv ntawm cov khoom A thiab B tsis yog lawm.Thaum siv ob yam khoom, tus neeg siv yuav tsum nruj me ntsis ua raws li qhov xav tau los ntawm cov chaw tsim khoom los kho qhov sib piv ntawm cov kua nplaum thiab cov tshuaj tua kab mob, txwv tsis pub muaj teeb meem tshwm sim nyob rau theem pib ntawm kev kho, lossis hauv theem tom ntej ntawm kev siv. adhesion, huab cua tsis kam thiab durability.nug;
⑸ Ua tsis tau ntxuav lub substrate raws li xav tau.Txij li cov hmoov av, av thiab impurities nyob rau saum npoo ntawm lub substrate yuav cuam tshuam kev sib txuas, nws yuav tsum tau ntxuav nruj me ntsis ua ntej siv los xyuas kom meej tias cov txheej txheem nplaum thiab cov substrate zoo sib txuas.
⑹ Tsis siv tshuaj primer raws li xav tau.Cov primer yog siv rau pretreatment ntawm qhov chaw ntawm aluminium profile, uas tuaj yeem txhim kho cov dej tsis kam thiab durability ntawm daim ntawv cog lus thaum lub sij hawm luv luv.Yog li ntawd, hauv kev siv engineering tiag tiag, peb yuav tsum siv cov primer kom raug thiab nruj me ntsis kom tsis txhob degumming los ntawm kev siv tsis raug.
2.8 Incompatibility nrog accessories
Yog vim li cas rau qhov tsis sib xws nrog cov khoom siv yog tias lub sealant muaj cov tshuaj tiv thaiv lub cev lossis tshuaj lom neeg nrog cov khoom siv hauv kev sib cuag, uas ua rau muaj kev phom sij xws li kev puas tsuaj ntawm cov khoom nplaum, tsis lo rau lub substrate, degradation ntawm kev ua haujlwm ntawm cov nplaum nplaum. , thiab luv luv lub neej ntawm cov txheej txheem nplaum.
3. Cov lus xaus
Silicone structural adhesive muaj lub zog siab, ruaj khov, zoo heev tiv thaiv, kub tsis kam thiab lwm yam khoom zoo heev, thiab yog dav siv nyob rau hauv cov qauv kev sib txuas ntawm lub tsev kab hlau rhuav phab ntsa.Txawm li cas los xij, hauv kev siv tswv yim, vim tib neeg cov yam ntxwv thiab cov teeb meem ntawm cov khoom siv hauv paus (cov kev tsim tshwj xeeb tsis tuaj yeem ua raws li nruj me ntsis), kev ua haujlwm ntawm cov txheej txheem nplaum cuam tshuam zoo heev, thiab txawm tias ua tsis tau.Yog li ntawd, qhov kev xeem sib raug zoo thiab kev kuaj adhesion ntawm cov iav, cov ntaub ntawv txhuas thiab cov khoom siv yuav tsum tau kuaj xyuas ua ntej kev tsim kho, thiab cov kev cai ntawm txhua qhov txuas yuav tsum tau ua raws li nruj me ntsis raws li cov txheej txheem tsim kho, thiaj li ua tiav cov txiaj ntsig ntawm cov txheej txheem nplaum thiab xyuas kom zoo. qhov project.
Lub sij hawm xa tuaj: Nov-30-2022