2024 Tus sau: Beatrice Philips | [email protected]. Kawg hloov kho: 2024-01-09 13:23
Txhawm rau kom tau txais cov khoom zoo nrog lub zog siab thiab lwm yam txiaj ntsig zoo, epoxy resin tau yaj. Txhawm rau ua qhov no, koj yuav tsum paub dab tsi yog qhov kub zoo tshaj plaws ntawm cov tshuaj no. Ib qho ntxiv, lwm yam xwm txheej tsim nyog rau kev kho kom raug ntawm epoxy yog qhov tseem ceeb.
Txwv tsis pub ua haujlwm kub
Yog lawm, qhov kub thiab txias cuam tshuam rau kev ua haujlwm thiab kho kom raug ntawm epoxy cob, tab sis txhawm rau nkag siab qhov ntsuas kub yog qhov siab tshaj plaws rau kev ua haujlwm ntawm cov tshuaj, nws tsim nyog paub koj tus kheej nrog nws cov yam ntxwv tseem ceeb.
- Polymerization ntawm cov khoom siv roj hmab tshwm sim thaum cua sov hauv theem thiab siv sijhawm 24 txog 36 teev. Cov txheej txheem no tuaj yeem ua tiav hauv ob peb hnub, tab sis nws tuaj yeem ua kom nrawm dua los ntawm kev ua kom sov cov kua kub mus rau qhov kub ntawm + 70 ° C.
- Kho kom raug kom ntseeg tau tias epoxy tsis nthuav dav thiab cov txiaj ntsig ntawm kev txo qis yog qhov tshem tawm zoo.
- Tom qab cov tawv tau tawv, nws tuaj yeem ua tiav hauv txhua txoj kev - zom, pleev xim, zom, laum.
- Kev kho kub-kub epoxy sib tov muaj cov txuj ci zoo thiab ua haujlwm tau zoo. Nws muaj cov cim tseem ceeb xws li kua qaub tsis kam, tiv taus qib siab ntawm cov av noo, cov kuab tshuaj thiab alkalis.
Hauv qhov no, qhov ntsuas pom zoo ntawm cov tshuaj ua haujlwm yog hom nyob hauv thaj tsam ntawm -50 ° C txog + 150 ° C, txawm li cas los xij, qhov siab tshaj plaws ntawm + 80 ° C kuj tau teeb tsa. Qhov sib txawv no yog vim qhov tseeb tias cov tshuaj epoxy tuaj yeem muaj cov khoom sib txawv, feem, lub cev lub cev thiab qhov kub uas nws tawv.
Qhuav hom
Ntau qhov kev tsim tawm, txheej txheem thev naus laus zis tsis tuaj yeem xav txog yam tsis siv epoxy resins. Raws li cov txheej txheem txheej txheem, cov kua yaj yaj, uas yog, kev hloov pauv ntawm cov khoom los ntawm cov kua mus rau hauv lub xeev ruaj khov thiab hloov pauv, tau ua tiav ntawm + 155 ° C.
Tab sis nyob rau hauv cov xwm txheej ntawm kev nce ionizing hluav taws xob, raug rau cov tshuaj lom hnyav thiab ntau dhau qhov kub nce mus txog + 100 … 200 ° C, tsuas yog siv qee yam sib xyaw ua ke. Yog lawm, peb tsis tham txog ED resins thiab EAF kua nplaum. Hom epoxy no yuav tsis yaj. Ua kom khov tag nrho, cov khoom no tsuas yog sib tsoo, hla dhau theem tawg thiab hloov mus rau lub xeev ua kua:
- lawv tuaj yeem tawg lossis ua npuas dej vim yog rhaub;
- hloov xim, sab hauv qauv;
- ua nkig thiab tawg;
- cov tshuaj yaj yeeb no kuj tseem yuav tsis dhau mus rau hauv lub xeev ua kua vim lawv muaj pes tsawg leeg tshwj xeeb.
Nyob ntawm qhov tawv tawv, qee cov ntaub ntawv tuaj yeem kub hnyiab, tso tawm ntau cov hmoov av, tab sis tsuas yog thaum sib cuag tas li nrog qhib hluav taws. Hauv qhov xwm txheej no, feem ntau, ib tus tsis tuaj yeem tham txog lub ntsiab lus melting ntawm cov yas, vim nws tsuas yog hla kev puas tsuaj, maj mam decomposing rau hauv cov khoom me me.
Nws ntev npaum li cas tom qab kho?
Cov txheej txheem, cov khoom siv thiab cov khoom tsim nrog kev siv epoxy resin tau pib ua kom pom tseeb ntawm cov qauv ntsuas kub raws li tau lees paub ua qauv txheej txheem:
- qhov kub tau txiav txim siab tas li ntawm -40 ° С txog + 120 ° С;
- qhov siab tshaj plaws yog + 150 ° C.
Txawm li cas los xij, cov kev xav tau no tsis siv rau txhua hom tshuaj pleev. Muaj cov txheej txheem huab rau cov pawg tshwj xeeb ntawm cov tshuaj epoxy:
- potting epoxy compound PEO -28M - + 130 ° C;
- kub-kua nplaum PEO-490K- + 350 ° С;
- epoxy-based kho qhov muag nplaum PEO-13K- + 196 ° C.
Xws li kev sib xyaw, vim yog cov ntsiab lus ntawm cov khoom siv ntxiv, xws li silicon thiab lwm yam khoom organic, tau txais cov yam ntxwv zoo dua qub . Cov tshuaj ntxiv tau nkag rau hauv lawv cov muaj pes tsawg leeg rau qhov laj thawj - lawv nce qhov tsis kam ntawm cov resins rau cov cua sov, tau kawg, tom qab cov tawv tawv tawv. Tab sis tsis tsuas yog - nws tuaj yeem muaj txiaj ntsig dielectric cov khoom lossis cov yas zoo.
Cov tshuaj Epoxy ntawm ED-6 thiab ED-15 cov npe tau nce kev tiv thaiv kom sov siab-lawv tiv taus txog + 250 ° C . Tab sis qhov tiv taus tshav kub tshaj plaws yog cov tshuaj uas tau txais los ntawm kev siv melamine thiab dicyandiamide - cov tawv tawv uas tuaj yeem ua rau polymerization twb nyob ntawm + 100 ° C. Cov khoom lag luam, hauv kev tsim cov yas uas tau siv, tau txawv los ntawm kev ua haujlwm tau zoo - lawv tau pom daim ntawv thov hauv kev ua tub rog thiab chaw lag luam. Nws nyuaj rau xav, tab sis qhov txwv qhov kub, uas tsis muaj peev xwm ua kom puas lawv, tshaj + 550 ° С.
Cov lus pom zoo rau kev ua haujlwm
Ua raws li kev tswj hwm qhov kub thiab txias yog lub hauv paus tseem ceeb rau kev ua haujlwm ntawm epoxy compounds. Ib qho kev nyab xeeb tseem yuav tsum tau khaws cia hauv chav (tsis qis dua + 24 ° С thiab tsis siab dua + 30 ° С).
Cia peb xav txog qhov xav tau ntxiv rau kev ua haujlwm nrog cov khoom siv
- Kev nruj ntawm lub ntim ntawm cov khoom sib xyaw - epoxy thiab tawv tawv - txog rau txheej txheem sib xyaw.
- Qhov kev txiav txim ntawm kev sib xyaw yuav tsum nruj - nws yog cov tawv tawv uas tau ntxiv rau cov khoom siv tshuaj.
- Yog tias siv cov tshuaj catalyst, cov tshuaj yuav tsum tau rhaub kom kub txog + 40.50 ° C.
- Hauv chav uas qhov haujlwm tau ua tiav, nws yog qhov tseem ceeb tsis tsuas yog tswj qhov ntsuas kub thiab nws qhov ruaj khov, tab sis kuj tseem xyuas kom ntseeg tau tias qhov av qis kawg nkaus nyob hauv nws - tsis ntau dua 50%.
- Txawm hais tias qhov tseeb tias thawj theem ntawm polymerization yog 24 teev ntawm qhov kub ntawm + 24 ° C, cov khoom tau txais nws lub zog kawg hauv 6-7 hnub. Txawm li cas los xij, nws yog thawj hnub uas nws yog ib qho tseem ceeb uas kev tswj hwm qhov kub thiab txias tsis hloov pauv, yog li ntawd, qhov hloov pauv me me thiab sib txawv ntawm cov ntsuas no yuav tsum tsis raug tso cai.
- Tsis txhob muab cov tshuaj hnyav thiab cov tshuaj sib tov loj dhau. Hauv qhov no, muaj kev pheej hmoo ntawm nws cov dej npau thiab poob ntawm cov khoom tsim nyog rau kev ua haujlwm.
- Yog tias kev ua haujlwm nrog epoxy ua ke nrog lub caij txias, koj yuav tsum ua kom sov chav ua haujlwm ua ntej los ntawm kev ntim cov pob nrog epoxy nyob ntawd kom nws tseem mus txog qhov xav tau kub. Nws raug tso cai kom sov ua kom sov nrog cov dej da dej.
Peb yuav tsum tsis txhob hnov qab tias nyob hauv lub xeev txias, cov kua nplaum ua kua vim yog tsim cov kab mob me me hauv nws, thiab nws nyuaj heev kom tshem tau lawv. Ib qho ntxiv, cov tshuaj yuav tsis khov, tshuav khov thiab nplaum. Nrog qhov kub thiab txias heev, koj tseem tuaj yeem ntsib qhov kev kub ntxhov xws li "txiv kab ntxwv tev" - qhov tsis sib xws saum npoo nrog nthwv dej, ua pob thiab zawj.
Txawm li cas los xij, los ntawm kev ua raws cov lus pom zoo no, saib xyuas txhua qhov xav tau uas tsim nyog, koj tuaj yeem tau txais qhov tsis muaj qhov tsis xws, txawm tias muaj qhov zoo ntawm cov nplaim hluav taws vim nws kho tau zoo.
Pom zoo:
Kev Tiv Thaiv Tshav Kub-tiv Taus: Kev Xaiv Kub-tiv Tshav Kub Rau Cov Qhov Cub, Cov Hluav Taws Uas Tiv Taus Cov Tshuaj Tiv Taus, Cov Khoom Siv Tsis Zoo Rau Lub Qhov Cub
Lavxias kev ua lag luam tau ntim nrog ntau ntau ntawm cov npe ntawm cov khoom tiv thaiv tshav kub uas tau siv hauv ntau thaj chaw ntawm tsev neeg thiab lub hom phiaj kev lag luam. Yuav ua li cas xaiv qhov raug xaiv kub-tiv tshav kub kom tiv thaiv qhov cub? Dab tsi yog lub foob zoo tshaj los siv los kho lub tsheb tso pa tawm?
Cov Cua Sov Tiv Taus Rau Cov Hlau: Kub Thiab Tiv Taus Dej, Tiv Tshav Kub Ntawm 300 Thiab 1000 Degrees, Tiv Thaiv Hluav Taws Rau Iav Thiab Roj Hmab
Cov kua nplaum tiv taus cua sov rau hlau tau siv dav hauv kev lag luam thiab hauv lub neej txhua hnub. Dab tsi los txiav txim siab thaum xaiv qhov ntsuas kub thiab dej tiv taus? Cov yam ntxwv zoo li cas yuav tsum muaj cov nplaum ua kom sov uas muaj peev xwm tiv taus qhov kub thiab txias ntawm 300 thiab 1000 degrees?
Cov Nplaum Ua Kom Sov-tiv Taus: Qhov Kub Thiab Txias Sib Xyaw Rau Qhov Cub Thiab Qhov Cub, Tiv Tshav Kub Thiab Tiv Taus Hluav Taws Kub Nplaum Rau Iav Thiab Vuas
Cov kua nplaum tiv taus cua sov: cov yam ntxwv thiab ntau yam. Dab tsi yuav tsum yog qhov kub thiab txias rau cov qhov cub thiab qhov cub? Yuav ua li cas xaiv txoj cai tshav kub-tiv taus nplaum rau siv hauv tsev?
Kub Phom Kub: Kub Tshaj Qhov Kub Ntawm Qhov Hluav Taws Xob. Qhov Kub Tsawg Kawg Nws Muab Tawm Yog Dab Tsi? Ua Haujlwm Coj Mus Rau Hauv Tus Account Qhov Ntsuas Kub Ntawm Rab Phom Cua Kub
Kub phom kub: kub tshaj qhov kub ntawm qhov hluav taws xob. Qhov kub tsawg kawg nws muab tawm yog dab tsi? Dab tsi ua haujlwm, suav nrog qhov ntsuas kub ntawm rab phom cua kub tuaj yeem ua tiav - nyeem txog qhov no hauv kev tshaj tawm
Dab Tsi Tuaj Yeem Cog Tom Qab Txiv Lws Suav? Nws Puas Tuaj Yeem Cog Dib Thiab Txiv Pos Nphuab Tom Qab Txiv Lws Suav Xyoo Tom Ntej? Cov Qoob Loo Twg Yog Cog Zoo Tshaj Plaws Hauv Vaj, Thiab Yam Twg Yuav Tsum Tsis Cog?
Dab tsi tuaj yeem cog tom qab txiv lws suav? Dab tsi yog qhov zoo dua cog rau xyoo tom ntej tom qab txiv lws suav, dib los yog txiv pos nphuab? Cov legumes puas tuaj yeem cog tom qab txiv lws suav? Wb tham txog qhov no hauv peb tsab xov xwm
