Thaum cov kua maj mam evaporates los ntawm cov khoom nyob rau hauv cov ntaub ntawv ntawm cov pa pleev xim thiab cov kua roj vanish, cov mixs harden thiab tau lawv lub cev thiab ua hauj lwm zog. Tab sis rau qee cov resins, xws li cov txheej txheem yog tsis yooj yim sua yam tsis muaj kev cuam tshuam ntxiv. Kev kho hauv qhov no yog qhov tshwm sim ntawm cov tshuaj tiv thaiv tshuaj. Lub sijhawm no, qhov sib xyaw polymerizes thiab tau txais cov qauv kawg.
Dab tsi hardeners yog rau
Epoxy resin hardeners ua lub zog rau cov tshuaj tiv thaiv thiab koom nrog hauv cov txheej txheem. Lawv tau ua ke nrog cov resin, vim li ntawd, nws muaj peev xwm tau txais cov khoom zoo xws li kev sib xws, hardness, durability thiab transparency. Cov yam ntxwv no yog txiav txim los ntawm qhov tseeb npaum li cas cov proportions raug xaiv thaum sib txuas cov resin thiab hardener.
Thaum lub sijhawm sib xyaw nws tus kheej ntawm cov khoom xyaw, yuav tsum tau ua raws li kev noj tshuaj kom raug. Cov tshuaj sib txawv ua raws li hardeners, cov no tuaj yeem yog anhydrides, carboxylic acids, diamines. Sib tov nrog cov saum toj noresin hardeners tsim cov thermosetting tebchaw uas muaj cov yam ntxwv hauv qab no:
- siab adhesion;
- dej tsis kam;
- zoo dielectric zog;
- tshuab lub zog;
- feem pua ntawm cov shrinkage.
Kev sib xyaw ntawm cov tawv tawv sib txawv
Epoxy resin hardeners tuaj yeem ua kua qaub lossis amine. Cov yav tas muaj xws li dicarbic acids thiab anhydrides. Kev kho ntawm cov resin thaum siv cov khoom sib xyaw no tshwm sim ntawm qhov kub siab txog li 200 ˚С. Cov tawv tawv no yog cov tshuaj tua kab mob kub.
Epoxy resin hardeners yog amine. Cov pab pawg no suav nrog ntau yam amines. Qhov no yog qhov yooj yim tshaj plaws thiab feem ntau xaiv hardener. Raws li kev cuam tshuam ntawm cov tshuaj no, cov resin hardens ntawm qhov kub thiab txias. Muaj qhov zoo ntawm no, uas yog qhov yooj yim ntawm kev siv. Tsis tas yuav siv cov cuab yeej tshwj xeeb. Cov hardeners no nrov, tab sis cov txiaj ntsig tau zoo dua tuaj yeem ua tiav nrog cov tshuaj acidic.
Thaum kub kho, cov resin tau txais kev txhim kho lub cev thiab tshuaj lom neeg. Ntawm cov hardeners ntawm epoxy resins, uas belongs rau cov pab pawg neeg acid, anhydrides ntawm dicarboxylic acids yuav tsum tau distinguished, namely:
- methyltetrahydrophthalic;
- maleic;
- methylenedic;
- phthalic;
- hexahydrophthalic.
Cov tebchaw no muaj cov khoom zoo dielectric, tiv taus qhov kub thiab txiasya raws. Lawv feem ntau yog siv rau kev rwb thaiv tsev hluav taws xob thiab ua cov khoom sib txuas rau cov yas yas. Ntawm cov tshuaj ntawm pawg amine, ib qho yuav tsum tau hais txog:
- triethylenetetramine (TETA);
- Ypolyethylenepolyamine (PEPA);
- aminoacrylates;
- Ypolyamines.
Siv thiab kev faib ua feem ntawm qee cov tawv tawv
Yuav kom paub cov hardener zoo dua, koj yuav tsum paub nws cov yam ntxwv. Piv txwv li, diethylenetriamine, uas kuj yog los ntawm cov ntawv luv luv tom ntej - DETA, yog cov kua pob tshab, tsis muaj qhov ntxoov ntxoo. Nws lub neej txee yog 2 xyoos ntawm qhov kub ntawm - 5 txog + 40 ˚С. Cov khoom muaj ammonia tsw. Qhov pom zoo kho hom yog nyob rau hauv ib hnub ntawm qhov kub ntawm + 25 ˚С. Yog tias qhov kev txwv no tau nce ntxiv rau + 70 ˚С, tom qab 5 teev kev kho yuav raug kho. Cov khoom siv yog exothermic, uas txhais tau hais tias cov txheej txheem kho yuav nrog rau qhov kub thiab txias. Nws tsis tuaj yeem siv los sau qhov ntim ntim.
Ua ntej koj pib, koj yuav xav paub ntau npaum li cas epoxy hardener koj xav tau. Nyob rau hauv cov ntaub ntawv ntawm cov lus piav qhia, lub ntim tuaj yeem nyob ntawm 8 mus rau 12%. Qhov no muaj tseeb thaum ua ke nrog ED-20 resin. Ib qho analogue ntawm PEPA yog Telalit 0210. Nws yog cov pob tshab pob tshab tawv nrog cov ntxhiab tsw. Koj tso tsis tau nws qhib. Tsis muaj lwm yam additives nyob rau hauv nws, yog li nws tsis yog li thermally ruaj khov. Ua ntej siv, koj yuav tsum tau ua ib qho kev xeem batch.
RC-19
Yog koj xav paub qhov hardenerrau epoxy siv, tej zaum koj yuav xav xav txog RC-19, uas tau ua pov thawj ua haujlwm zoo hauv cov av noo thiab tsis kub. Kev siv yog 500 g ib kg ntawm resin. Lub sij hawm ntawm gelatinization yog nyob rau hauv ib nrab ib teev. Haum rau casting loj qhov chaw. Yooj yim rau installation ntawm tus kheej-leveling pem teb.
Epilox H 10-40
Yog tias koj pom daim ntawv lo Epilox H 10-40, ces koj muaj ib qho reactive hardener uas yuav siv tau raws li ib tug accelerator rau amine hardeners. Ua haujlwm ntawm qhov kub thiab txias, uas tso cai rau nws siv los tsim cov ntim ntim. Lub viscosity ntawm cov khoom no yog nruab nrab. Cov koob tshuaj pom zoo yog 50 feem ntawm 100 qhov chaw cob.
DIY hardener
Ib qho ua-nws-koj tus kheej hardener rau epoxy resin tuaj yeem npaj tau, tab sis nws qhov zoo yuav muaj lus nug. Xws li qhov xav tau tshwm sim ntau zaus, vim tias cov khoom siv tawv muag muag tag nrog cov resin, tab sis thawj cov khoom tsis yog ib txwm txaus. Nws tuaj yeem nyuaj heev kom khaws cov tshuaj kom meej, yog li lub hardener siv sai dua.
Nws yog qhov nyuaj heev kom nrhiav tau lub hardener hauv kev tsim kho lossis hauv khw. Ua ntej cov neeg ua haujlwm hauv tsev, cov lus nug ntawm kev hloov lossis kev tsim khoom tus kheej feem ntau tshwm sim. Hauv tsev, nws yuav luag tsis tuaj yeem hloov lub hardener. Improvised txhais tau tias tsis haum txhua, nws yog ib qho tsim nyog yuav tsum tau yuav cov tshuaj tsim nyog - hardeners, uas tsis tshua paub. Ntawm lawv, nws yuav tsum tau sau tseg"Etal-45M". Txoj kev siv cov tshuaj no yuav txawv ntawm kev siv cov pa polyethylenepolyamine. Koj yuav tsum tau sim qhov zoo tshaj plaws piv ntawm hardener thiab resin.
ua noj ua haus
Txawm li cas los xij, ntau txoj hauv kev los ua lub hardener hauv tsev twb muaj lawm, tab sis qhov ua tau zoo tseem tsis ntseeg. Ib qho kev xaiv yog ntxiv cawv qhuav rau cov resin. Urotropin ntsiav tshuaj yuav tsum tau crushed rau hauv hmoov thiab tov nrog cob. Nyob rau hauv cov ntaub ntawv no, nws yog tsim nyog los siv ib tug ratio ntawm 1 mus rau 10. Qee tus tswv pom zoo kom tawm hauv qhov sib xyaw ua ke mus txog 10 teev.
Cov yam ntxwv ntawm daim ntawv thov. Yuav ua li cas yug kom raug
Yog tias koj ua raws li cov thev naus laus zis ntawm kev sib xyaw hardener nrog cov resin, koj tuaj yeem ua tiav qhov txiaj ntsig kawg. Tag nrho cov khoom ntawm qhov sib tov yog ntsuas raws li cov lus qhia. Txhawm rau ua haujlwm, koj yuav tsum npaj:
- ntoo;
- mixing container;
- ob syringes.
Ib tus pas yuav xav tau rau kev sib tov. Ua ntej diluting epoxy nrog hardener, nws yog ib qho tseem ceeb kom nco ntsoov koj tus kheej tias cov tshuaj tiv thaiv yog irreversible. Nws yog qhov zoo dua los xyaum ua cov qauv kuaj, siv cov khoom me me rau qhov no. Qhov no yuav tso cai rau koj los txiav txim qhov proportions thiab nkag siab ntau npaum li cas cov resin yuav qhuav. Nws yog rhuab saum chav tsev kub ua ntej sib tov. Cov khoom yuav tsum ua kom qis dua. Yog resincrystallized, nws yog rov qab mus rau nws thawj lub xeev, rhuab mus rau ib tug kub ntawm + 40 ˚С. Nyob rau hauv cov ntaub ntawv no, koj yuav tsum tas li do cov sib tov. Ua kom sov yog qhov zoo tshaj plaws hauv da dej.
Nws yog ib qho tseem ceeb kom tsis txhob overheating cov resin, vim hais tias tom qab boiling nws yuav npog nrog npuas ncauj, yuav siv tsis tau. Cov resin yuav tsum tau kos rau hauv lub syringe thiab muab tso rau hauv ib lub khob. Koj yuav tsum xam cov koob tshuaj ua ntej. Qhov xav tau ntawm hardener yuav tsum tau sau los ntawm kev ntxiv rau hauv lub thawv resin. Cov muaj pes tsawg leeg yog zoo sib xyaw rau ib homogeneous sib xws, thaum siv cov cuab yeej hluav taws xob tsis yooj yim sua.
Tom qab cov ntshiab epoxy thiab hardener sib tov, cov sib tov yog npaj siv. Nws yog siv rau thaj tsam xav tau, qhov twg muaj pes tsawg leeg maj mam hardens. Qhov loj yuav tsum tau ua kom sai txaus, vim hais tias polymerization yuav pib li ntawm ob peb feeb tom qab sib tov. Cov qauv ntawm cov tshuaj yuav hloov, uas yuav cuam tshuam rau cov yam ntxwv ntawm cov epoxy kho.
Qee cov nkauj niaj hnub
Ntawm kev muag hnub no koj tuaj yeem pom cov khoom siv tawv tawv hloov kho uas tsis muaj qee qhov tsis zoo ntawm cov khoom sib xyaw, tab sis lawv cov nqi yog me ntsis siab dua. Cov khoom tiav tau txais cov yam ntxwv muaj zog, cov resin polymerizes ntau dua. Cov khoom no ua raws li cov yas yas, thiab qee zaum muaj peev xwm ua kom plasticize thiab dilute epoxy.
Nrog rau lwm tusNws yog ib qho tsim nyog los qhia txog M-4 hardener, uas yog amine thiab muaj viscosity siab. Nws cov xim yog xim liab-xim av. Kev sib tov yog nqa tawm hauv ntim ntawm 20 mus rau 25% ntawm cov khoom siv hauv paus. Cov tshuaj kho epoxy ntawm qhov kub ntawm + 2 ˚С, vim li ntawd, nws tuaj yeem tau txais cov khoom muaj zog ntxiv.
Cov khoom lag luam yog cov tshuaj tua kab mob sai thiab tsim los ntawm PEPA. Ntxiv nrog rau kev kho mob khaub thuas, koj tuaj yeem ua kom kub kub. Lub sijhawm plasticizing thiab gelling yuav yog 30 feeb ntawm chav tsev kub. Yog tias qhov ntsuas kub qis dua, lub sijhawm yuav nce mus txog 50 feeb.
Yog tias koj xav muab cov epoxy ntshiab nrog lub hardener, koj tuaj yeem xav txog 921, uas los ntawm ntau yam. Tus neeg sawv cev yog tsawg-viscosity, tso cai rau koj kom tau txais cov epoxy tshwj xeeb. Lawv yog UV thiab puas resistant.
