Yuav ua li cas haj yam ua rau epoxy cob? Ua hauj lwm nrog epoxy cob

Lo lus "epoxy" yog paub tias yuav luag txhua leej txhua tus. Tab sis lub epoxy cob, uas daim ntawv thov yog heev hnub no, yog ib yam ntawm cov khoom cua cob. Nws nyob rau hauv lub 50s. yav dhau los xyoo pua thiab sai tau chaw tsaug rau nws cov ntau yam khoom.

Niaj hnub no, epoxy resins yog siv nyob rau hauv lub muaj ntau lawm thiab tsev neeg. Tau daim ntawv sau npe tas li expanding vim txoj kev loj hlob ntawm formulations nrog zoo yam ntxwv.

hauj lwm Epoxy

Raws li cov tshuaj nyob tus yeees ntawm epoxy cob - ib tug hluavtaws compound oligomeric. Cov ntaub ntawv muaj nyob rau hauv kev thov nyob rau hauv yuav luag tag nrho cov spheres ntawm kev lag luam. Cov dawb daim ntawv epoxy yog siv, tab sis nyob rau hauv nrog ib tug ruaj khov neeg sawv cev nws yuav manifest cim zog tom qab polymerization cov tshuaj tiv thaiv. Yog hais tias lub epoxy cob curing agents mus txuas nrog rau, nws yuav tshwm sim:

• nyuaj, khoom ntaub ntawv;
• Mos thiab check khoom;
• roj hmab zoo li cov ntaub ntawv.

Epoxy resins yog resistant mus rau lub nram qab no tej yam tshuaj:

• halogens;
• acid;
• alkalis.

Txawm li cas los, nyias mus nyias tshwm sim nyob rau hauv esters thiab acetone tsis muaj zaj duab xis tsim. Tom qab tua cov epoxy cob muaj pes tsawg leeg tsis emit nws volatiles thiab lub shrinkage yog negligible.

Tshwj xeeb tshaj yog epoxy cob chaw ua taus zes

Yog hais tias koj muaj wondering txog yuav ua li cas haj yam ua rau epoxy, koj yuav tsum paub hais tias tus tsis muaj los yog tshaj ntawm tua neeg sawv cev nyob rau hauv muaj pes tsawg leeg yuav adversely muaj feem xyuam rau qhov zoo ntawm cov polymer, thaum uas seem resistant rau thaum tshav kub kub, tab sis nws lub zog yog txo, muaj peev xwm dab cov tshuaj thiab dej yuav dim . Yog hais tias lub hardener yog ntxiv nyob rau hauv tsis txaus npaum li cas, hauv tsab xov xwm tej zaum yuav nplaum vim lub unbound cob.

Ua ntej dilute lub epoxy cob, nws yog tsim nyog los nkag siab hais tias lub dhau heev lawm free hardener yog tso tawm nyob rau polymer nto thaum lub sij hawm lub lag luam. Rau txawv tebchaw curable tivthaiv thiab cob yog siv nyob rau hauv sib txawv proportions, qhov no yuav pom nyob rau hauv phau ntawv. Thaum nws los txog rau niaj hnub lub tebchaw, tus piv yog lub feem ntau raws li nram no: 1 mus rau 2 los yog 1: 1.

Pom zoo rau yug me nyuam ntawm epoxy cob

Rau hnub tim, nws yog ntseeg hais tias thaum uas siv cov hardener nyob rau hauv volume ntau tshaj qhov txhia qhov tshuaj tiv thaiv polymerization tshwm sim sai. Qhov no xav yuav suav hais tias yog yuam kev. Qhov yooj yim txoj kev uas yuav kom tus txheej txheem yog ua kom qhov kub ntawm cov tshuaj tiv thaiv sib tov.

Yog hais tias koj xav kom ceev li tus txheej txheem peb lub sij hawm, qhov kub thiab txias yuav tsum tau nce mus rau 10 ° C. Yog hais tias koj tsa cov nqe lus nug ntawm yuav ua li cas haj yam ua rau epoxy, koj yuav tsum paub tias hnub no yog paub tshwj xeeb tebchaw, uas compositions muaj curing accelerators. Nws muaj peev xwm nrhiav tau rau ntawm kev muag khoom, thiab epoxy tebchaw uas solidify thaum uas tsis muaj kub. Ntaus tua neeg saib xyuas thiab qhov kub thiab txias ntawm lub sib tov ua raws li lub ntsiab yam tseem ceeb uas cuam tshuam rau tus nqi ntawm polymerization.

NQHAJ epoxy cob: compositions nrog txawv polymerization kub

Lub epoxy cob tej zaum yuav kho ntawm ib tug kub xws li los ntawm -10 mus +200 ° C, nws yuav yog nyob ntawm seb ntau yam siv pes tsawg leeg. Rau hnub tim, lub npe hu resins rau kub thiab txias curing. Khaub thuas hom hardener thiab epoxy cob feem ntau nquag siv nyob rau hauv lub neej txhua hnub. Yuav kom tau raws li ib tug muaj pes tsawg leeg yuav ua tau nyob rau hauv lub tej yam kev mob ntawm kev siv thiab ua thiab tsis muaj zog, thiab qhov chaw uas tshav kub kub kev kho mob yog tsis tsim nyog.

Yog xav tau siab zog cov khoom yuav tsum tau nyiaj mus dhau siab loads thiab kub, raws li tau zoo raws li raug tus kab mob rau cov tshuaj, yog siv kub curing hom tivthaiv. tuab mesh molecules tsim thaum lub sij hawm kub polymerization. Tsis tas li ntawd, muaj compositions thiab lawv oxides uas yog tau polymerize nyob rau hauv hiav txwv dej thiab nyob rau hauv noo tej yam kev mob.

kheej ntawm daim ntawv thov

Epoxy ntaub ntawv faib niaj hnub no ib ncig ntawm lub ntiaj teb no, lawv paub tias txij li thaum nruab nrab ntawm lub xeem tiam. Qhov xwm ntawm tus siv ntawm cov ntaub ntawv nyob rau hauv xyoo tsis ntev los tau undergone tseem ceeb cov kev hloov, tab sis kev siv yog tsoos nyob rau hauv ob peb lub chaw, nyob rau hauv lawv:

• impregnated iav fiber ntau thiab khob fiber;
• txheej rau waterproofing;
• creation ntawm tshuaj-resistant coatings;
• zus tau tej cov pob tshab khoom cov ntaub ntawv uas rau fiberglass khoom.

Epoxy cob, kev siv cov uas yog tam sim no heev, muaj peev xwm ua raws li ib tug Impregnating roj nplua neeg sawv cev rau tsevneeg Cheebtsam nyob rau hauv lub qhov hluav taws xob, automotive, aviation teb, electronics thiab kev lag luam. Nyob rau hauv cov ntaub ntawv no, muaj pes tsawg leeg siv nyob rau hauv qhuav ntawm fiberglass nyob rau hauv mechanical engineering thiab shipbuilding, kev tsim kho, kho Rhiav tej yam kev mob lub tsheb cev ntsiab thiab lub nkoj hulls.

Ua hauj lwm nrog epoxy cob yog nqa tawm nyob qhov twg muaj ib tug xav rau foob cov phab ntsa thiab cov plag tsev ntawm qab lawj thiab dej da. Siv tej zaum yuav ua los ntawm epoxy cob cov ntaub ntawv thiab cov xim tsev rau sab nrauv thiab sab hauv kho kom zoo nkauj ntawm cov vaj tse, raws li zoo raws li impregnation, uas yuav muab waterproofing ntxeem tau cov ntaub ntawv thiab lawv cov zog lub dag lub zog, lawv yuav tsum muab sau ua ke cov ntoo thiab pob zeb ua.

rau cov ntaub ntawv

Lub epoxy cob tej zaum lub hauv paus ntawm pob tshab khoom khoom, uas yog ua los ntawm casting mus rau hauv ib cov pwm. Nyob rau hauv lub tom ntej no theem ntawm cov khoom tiav los ntawm cov neeg kho tshuab txoj kev, xws li: sib tsoo thiab tej. Siv rau fiberglass khoom nyob rau hauv lub tsim tej hauj lwm, cov electronics kev lag luam, kev tsim kho thiab tsev neeg.

Ua hauj lwm nrog epoxy: nto npaj

Ua hauj lwm nrog epoxy yuav qhov yuav tsum tau rau saum npoo kev npaj ua ntej rau daim ntawv thov ntawm cov muaj pes tsawg leeg. Tsuas yog ces yuav tsum tau mus cuag siab adhesion. Yog li ntawd, ua ntej yaj epoxy cob, thawj npaj qhov chaw. Yuav pib ib lub hauv paus degreasing. Nyob rau saum npoo yuav tsum tau tsis muaj ib co kua nplaum ntawm cov roj thiab roj. Lub nto ntxuav siv ib tug hnyav los yog detergent zoo. Nws yog ib qho tseem ceeb kom paub tseeb hauv lub qhaj ntawv ntawm gloss.

Lub sab sauv txheej raug tshem tawm los ntawm kev sib tsoo. Me chaw yuav tsum tau npaj los ntawm txhais tes, siv lub ntwav txhuam ntoo li no. Imposing rau puag cheeb tsam daws sib tsoo tshuab, thiab lub resulting hmoov av yuav tsum tau muab tshem tawm nrog ib lub tshuab nqus tsev ntxhua khaub ncaws. Thaum raug fiberglass los yog layering epoxy self-leveling plag tsev, varnishes thiab xim tsev txhua tom ntej txheej yuav tsum tau ua ntawv thov mus rau lub tsis solidified, tseem nplaum yav dhau los txheej.

Yog hais tias lub tshuab thiab cov uas yuav tsum tau rau cov khoom tiav daim ntawv tso cai, tus qis txheej, uas ua raws li ib tug substrate, yuav tsum muaj me me feem sprinkled xuab zeb. Tom qab tua tshaj cov xuab zeb yuav tsum tau tshem tawm thiab thov ib tug txheej tshiab ntawm epoxy.

Npaj ib tug loj npaum li cas ntawm epoxy cob

Yog hais tias koj tsis paub cov kev thaj chaw ntawm lub epoxy cob, ces tej zaum koj yuav raug teeb meem nyob rau hauv qhov siv thiab ua cov ntaub ntawv nyob rau hauv tej. Nrog ua volume epoxy, ib tug loj npaum li cas ntawm tshav kub. Boiling cob ua npuas ncauj yuav ua npub dawb. Qhov no muaj pes tsawg leeg yuav tsis muab suav hais tias haum rau kev siv. diluents thiab kuab tshuaj yuav muab ntxiv rau txo lub viscosity mus rau lub cob. Txawm me me ntau yuav ua rau ib tug txo nyob rau hauv lub dag lub zog thiab tshav kub tsis kam ntawm cov khoom. Qhov tsim nyog yuav exudation ntawm diluent los ntawm lub polymer, uas ua rau yus degradation ntawm cov khoom.

Epoxy resins thiab curing agents tsis muaj dej. Yog hais tias qhov no tshwm sim, ces tus muaj pes tsawg leeg yuav turbid thiab loses nws cov khoom. Niaj hnub no tso tawm los ntawm dej los epoxy. Tej compositions yog bred nrog distilled dej mus cuag dispersion. Epoxy cob yuav tsum tau tov nrog ib tug plasticizer. Cov uas ua sib tov twb maj mam sov yog muaj tseeb thaum uas siv cov DBP. Nyob rau hauv thov DEG-1 muaj pes tsawg leeg yuav tsum tau tov.

Rau txhij txhua nws yuav tsum tau siv rau tho kev tshwj xeeb nozzle siv los yog ib tug tov. Lub proportions ntawm resin thiab plasticizer raug xaiv nyob ntawm seb qhov yuav tsum tau ductility, tab sis feem ntau kev faib ua feem ntawm plasticizer yog hom twg los ntawm 5 mus rau 10%. Cov sib tov yog ntxiv rau cov hardener. Lub cob yog txias mus rau +30 ° C, los mus tiv thaiv ib kub npau npau. Standard kev faib ua feem ntawm cov cob nrog lub hardener tshwm li 1 mus rau 10. Yuav kom ua tau niaj hnub xaus hardener yuav tsum xyuas kom meej tov. Txwv tsis pub, cov muaj pes tsawg leeg yuav ua kev, thiab tom qab ntawd yuav tawm hws.

cob Crafts

Heev feem ntau masters khiav lag luam khoom los ntawm epoxy resins. Cov hauj lwm uas nrog los ntawm tej yam teeb meem. Cov khoom yuav tsum tau muaj pob tshab nyob rau ntawd yuav tsum tsis muaj cua bubbles. Lub thicker thiab tua tus nto yuav tsum niaj hnub zoo li. Yog hais tias lub thickness yog tshaj 2 hli, cov khoom yog thov tom qab cov thawj khaubncaws sab nraud povtseg ntawm cov polymerization. Lub cob yuav poured mus rau hauv cov ntaub ntawv. Rau cov khoom twb sib cais, daim ntawv smeared nrog roj av jelly los yog roj.

Zas qob rau epoxy cob yuav ua rau cov khoom xim. Tom qab kawm tiav ntawm cov khoom yog khaws cia ntawm ib tug kub me ntsis saum toj no chav kub. Tom qab 3 lub chasa los thawj polymerization curing ua ntej detachment, tom qab cov khoom no yuav tsum sov so rau accelerate lub curing txheej txheem rau 6 teev. Yog hais tias koj txiav txim siab mus ua crafts ua los ntawm epoxy cob, ces, tej zaum nws yuav tsis muaj peev xwm siv ib tug tshwj xeeb txee qhov cub.

Thaum chav tsev kub lub polymerization yuav kav 2 lub lim piam. Yog hais tias cov khoom xyaw ntxiv triethylenetetramine, tus nto yuav nyob twj ywm nplaum. Cam khwb cia khoom nyob rau hauv lub neej yav tom ntej yuav tsum tau machined. Epoxy cob domestic ntau lawm tsis yog raws li haum rau cov casting ntawm loj heev cov khoom, vim hais tias nws yog txawv curing sis tsis ncaj tuab.

Ua xim epoxy cob

Zas rau epoxy cob yuav muab lub tsev muaj pes tsawg leeg, pleev xim rau nyob rau hauv ib lub cev nqaij daim tawv. Nyob rau hauv thiaj li yuav xyuas kom meej ib yam tis ntawm cov xim manufacturers siv kaum surfactants. Pigmentation yuav txo tau lub transparency ntawm lub cob, tej zaum nws hloov xim, suab tsaus ntuj nti. Ntxiv xim rau cov catalyst yuav tsum tau nqa tawm, tiam sis tom qab qhov sib ntxiv ntawm ciab.

Kev yam ntxwv ntawm lub epoxy cob muaj pes tsawg leeg ntawm Piv txwv li cim ED-20

Epoxy cob, tus yam ntxwv uas yuav tsum tau teev tseg hauv qab no, sawv cev rau ib tug niam-zoo li yellowish kua uas yog nkag dawb lias. Ceev nyob rau hauv 20 ° C ambient yog ib tug txwv 1,16-1,25 kg / m ^3. Tensile zog yog 40-90 MPa. Flexural zog sib npaug rau 80-140 MPa. Compressive zog yog 100-200 MPa.

Lub polymerization kub yog 20 ° C thiab saum toj no. Yog hais tias koj xav nyob rau hauv lub epoxy cob, cov proportions ntawm sib tov thaum ua ke nrog rau hardener yuav tsum tau muaj kev txaus siab. Cov yav tas yuav tsum tau siv nyob rau hauv tus nqi ntawm cov 7 qhov chaw, thaum lub sij hawm cob ntxiv nyob rau hauv ib tug npaum li ntawm 1 ib feem. Lub polymerization lub sij hawm yog 1.5 teev muaj pes tsawg leeg. Dej haum tom qab 24 teev yog sib npaug zos rau cov kev txwv ntawm 0.01-0.1%. Thaum tshav kub kub kuj yog hom twg los ntawm 55 mus rau 170 ° C. Impact lub zog yog 5-25 kJ / m ^2.

Ntsiab thaj chaw ntawm epoxy cob

Ua ntej peb yuav nyob rau qhov lo lus nug ntawm qhov chaw uas yuav epoxy, koj yuav tsum paub nws yooj yim zog. Cov lwm yuav tsum faib tsawg kuj mus ntes, raws li zoo raws li ntau ntau yam pauv loj toxicity li muab piv nrog acrylic resins. Lub zog ntawm cov epoxy cob qhia tau tias muaj pes tsawg leeg muaj ib tug high viscosity, nws yuav tsum tau siv nyob rau hauv ua ke nrog cov kuab tshuaj. lub sib tov yuav tsum rhuab, los yog ntxiv ib tug hnyav kom txo tau cov viscosity ntawm lub cob. Nyob rau hauv ob qho tib si zaum, qhov kev cob yuav ua ntau kua. Nws yuav tsum muaj ntaub ntawv los ntawm txhuam los yog rau cov menyuam, nws sai sai impregnate fiberglass thiab txeem tau cov ntxeem tau nto xws li ntoo.

xaus

Heev feem ntau, tau txais kev pab muaj wondering txog qhov twg mus yuav cov epoxy cob. Niaj hnub no, qhov no cov ntaub ntawv uas muaj ib tug ntau yam ntawm tuam txhab uas muag, nrog lwm tus, yuav tsum tau ua puas lub tsev loj "Carbo" uas yog nyob rau hauv Moscow thaum lub Volgograd prospectus, 42.