Kev siv cov epoxy resin adhesives

Epoxy resin nplaum nplaum(hu ua epoxy adhesive lossis epoxy nplaum) tau tshwm sim txij li xyoo 1950, tsuas yog ntau tshaj 50 xyoo. Tab sis nrog rau ib nrab xyoo pua 20th, ntau yam kev tshawb xav adhesive, nrog rau cov tshuaj nplaum nplaum, nplaum rheology thiab adhesive kev puas tsuaj mechanism thiab lwm yam kev tshawb fawb ua haujlwm hauv qhov tob, kom cov nplaum nplaum, ntau yam thiab kev siv tau ua tiav sai. Epoxy resin thiab nws cov txheej txheem kho nrog nws qhov tshwj xeeb, kev ua tau zoo heev thiab cov epoxy resin tshiab, tus neeg sawv cev kho tshiab thiab cov khoom ntxiv tau tshwm sim, dhau los ua cov chav kawm ntawm cov nplaum nplaum tseem ceeb nrog kev ua tau zoo, ntau yam, dav adaptability.
Epoxy resin nplaum ntxiv rau cov yas uas tsis yog-polar xws li polyolefin bonding tsis zoo, rau ntau yam khoom siv hlau xws li txhuas, hlau, hlau, tooj liab: cov ntaub ntawv tsis yog xim hlau xws li iav, ntoo, pob zeb, thiab lwm yam: zoo li thermosetting plastics xws li phenolics, aminos, unsaturated polyester, thiab lwm yam. Epoxy nplaum yog cov txheej txheem nplaum hnyav epoxy resin daim ntaub ntawv.
Classification los ntawm curing tej yam kev mob
Cold curing adhesive (tsis muaj cua sov curing nplaum). Kuj muab faib ua:

Tsawg kub curing nplaum, curing kub <15 ℃;
Chav tsev kub curing nplaum, curing kub 15-40 ℃.
Thaum tshav kub kub curing nplaum. Nws tuaj yeem muab faib ua:
Nruab nrab kub curing nplaum, curing kub txog 80-120 ℃;
Kub kub curing nplaum, curing kub> 150 ℃.
Lwm txoj hauv kev kho cov nplaum, xws li lub teeb curing adhesive, ntub dej thiab dej curing nplaum, latent curing nplaum.

Epoxy adhesives muaj cov hauv qab no zoo dua lwm hom adhesives:

Epoxy cobmuaj ntau pawg polar pawg thiab cov pab pawg epoxy nquag heev, yog li nws muaj zog nplaum nplaum nrog ntau yam khoom siv polar xws li hlau, iav, cement, ntoo, yas, thiab lwm yam, tshwj xeeb tshaj yog cov uas muaj kev ua haujlwm siab, thiab tib lub sij hawm lub zog cohesive ntawm epoxy kho cov khoom kuj loj heev, yog li nws cov nplaum nplaum yog siab heev.
Tsis muaj qhov tsis tshua muaj molecular volatiles tsim thaum epoxy resin kho. Lub ntim shrinkage ntawm cov nplaum txheej yog me me, li ntawm 1% mus rau 2%, uas yog ib qho ntawm ntau hom nrog qhov tsawg tshaj plaws curing shrinkage nyob rau hauv thermosetting resins. Tom qab ntxiv muab tub lim tuaj yeem raug txo kom qis dua 0.2%. Lub coefficient ntawm linear expansion ntawm epoxy kho cov ntaub ntawv kuj yog heev me me. Yog li ntawd, qhov kev ntxhov siab sab hauv yog me me, thiab tsis tshua muaj kev cuam tshuam rau kev sib khi lub zog. Tsis tas li ntawd, qhov nkag ntawm epoxy kho cov khoom me me, yog li qhov kev ruaj ntseg ntawm cov nplaum txheej yog qhov zoo.
Muaj ntau ntau yam ntawm epoxy resins, curing agents thiab modifiers, uas tuaj yeem tsim nyog thiab txawj tsim los ua cov nplaum nrog cov txheej txheem uas yuav tsum tau ua (xws li kev kho sai, chav tsev kub curing, tsis kub curing, curing hauv dej, low-viscosity, siab viscosity, thiab lwm yam), thiab nrog rau kev siv cov kev ua tau zoo (xws li kev ua haujlwm siab, kev ua haujlwm siab, kev ua haujlwm siab, kev ua haujlwm siab, thiab lwm yam) aging kuj, hluav taws xob conductivity, magnetic conductivity, thermal conductivity, thiab lwm yam).
Nrog rau ntau yam organic tshuaj (monomer, resin, roj hmab) thiab inorganic tshuaj (xws li fillers, thiab lwm yam) muaj zoo compatibility thiab reactivity, yooj yim rau copolymerization, crosslinking, blending, filling thiab lwm yam kev hloov kho los txhim kho cov kev ua tau zoo ntawm cov nplaum txheej.
Zoo corrosion kuj thiab dielectric zog. Resistant rau acid, alkali, ntsev, kuab tshuaj thiab lwm yam xov xwm corrosion. Volume resistivity 1013-1016Ω-cm, dielectric zog 16-35kV / mm.
General-purpose epoxy resins, curing agents thiab additives muaj ntau lub hauv paus chiv keeb, loj ntau lawm, yooj yim rau formulate, tuaj yeem tiv tauj siab molding, tuaj yeem siv rau ntawm qhov loj.

Yuav xaiv li casepoxy cob

Thaum xaiv ib qho epoxy resin, muaj ntau yam los xav txog, suav nrog:

Kev Siv: Cov epoxy puas tuaj yeem siv rau lub hom phiaj dav dav lossis ntau daim ntawv thov kev lag luam?
Lub neej ua haujlwm: Ntev npaum li cas epoxy yuav tsum tau siv ua ntej kho?
Lub Sijhawm Kho Mob: Nws yuav siv sijhawm ntev npaum li cas rau cov khoom kho thiab kho tag nrho siv cov epoxy?
Kub: Qhov kub ntawm qhov yuav ua haujlwm li cas? Yog tias tus yam ntxwv xav tau, puas tau xaiv epoxy raug kuaj rau qhov kub thiab txias?

Yam ntxwv:

High thixotropic zog, tuaj yeem siv rau kev tsim kho façade.
Cov yam ntxwv ntawm ib puag ncig kev nyab xeeb siab (cov kuab tshuaj tsis muaj tshuaj tua kab mob).
Kev hloov pauv siab.
High kev sib raug zoo zog.
High hluav taws xob rwb thaiv tsev.
Zoo heev mechanical zog.
Zoo heev kub thiab dej tsis kam.
Kev ruaj ntseg zoo heev, khaws cia ntev txog 1 xyoos.

Daim ntawv thov:Rau kev sib txuas ntawm ntau yam hlau thiab tsis yog hlau, xws li hlau nplaum, aluminium alloys, sensors, thiab lwm yam.