Peb yam tseem ceeb cuam tshuam rau Adhesive Curing

Kev kho cov tshuaj tiv thaiv ntawm cov nplaum yog cov txheej txheem tsim thiab txhim kho cov khoom xws li kev sib txuas ntawm cov tshuaj tiv thaiv (polymerization thiab crosslinking). Kev kho yog cov kauj ruam tseem ceeb los ua kom tau txais txiaj ntsig kev sib raug zoo; Qhov siab tshaj plaws kev sib khi lub zog tuaj yeem ua tiav thaum kho tag nrho. Raws li lub sijhawm kho, nws tau muab faib ua peb theem: pib kho, thawj kho thiab tom qab - kho.

Kev kho qhov pib txhais tau tias tom qab qee lub sijhawm ntawm qhov kub thiab txias, cov kua nplaum tau txais qee lub zog, nws qhov chaw hardens thiab tsis nplaum, tab sis nws tseem tsis tau kho tag nrho.

Kev kho yooj yim txhais tau tias tom qab ntau lub sijhawm dhau mus, feem ntau cov pab pawg reactive koom nrog cov tshuaj tiv thaiv thiab mus txog qib crosslink.

Post-kho txhais tau tias kho qhov sib koom ua ke tom qab kev kho yooj yim los txhim kho kev sib raug zoo los yog ua tau raws li cov txheej txheem. Feem ntau peb khaws lawv ntawm qhov kub thiab txias rau qee lub sijhawm. Cov kauj ruam ntxiv no ua tiav kev kho, nce qib kho ntxiv, tshem tawm cov kev ntxhov siab sab hauv kom zoo thiab ua rau kev sib raug zoo.

Txhawm rau kom tau txais cov kua nplaum zoo - kho cov kua nplaum, cov txheej txheem kho yuav tsum tshwm sim raws li qhov tsim nyog. Cov txheej txheem curing ntawm adhesives cuam tshuam rau kev sib raug zoo. Nws muaj peb yam txheej txheem tseem ceeb rau kev kho: kub, siab thiab sijhawm. Peb yam no muaj kev cuam tshuam loj heev rau kev kho cov nplaum li cas.

Peb yam tseem ceeb cuam tshuam rau Adhesive Curing

1. Curing kub yog ib qho tseem ceeb ntawm cov nplaum nplaum. Yog tias qhov kub thiab txias dhau lawm, cov kua nplaum yuav ntws tawm yooj yim los yog cov kua nplaum txheej yuav tig nkig, txo qis kev sib raug zoo. Yog tias qhov kub thiab txias qis dhau, cov molecules ntawm cov khoom siv hauv paus tsis tuaj yeem txav mus los ywj pheej. Qhov no ua rau qis crosslink ceev thiab kho tsis tiav. Yog li peb yuav tsum tswj qhov kub thiab txias nruj me ntsis thaum kho, txij li txhua cov nplaum muaj nws tus kheej qhov kub thiab txias.

2. Curing siab txhais tau hais tias siv qee lub siab thaum kho kom pab cov kua nplaum txheej zoo nrog cov khoom sib koom ua ke thiab lav zoo, thiab cov nplaum sib txawv xav tau cov siab sib txawv uas tuaj yeem muab faib ua peb hom: kev sib cuag siab tsuas yog siv qhov hnyav ntawm cov khoom sib txuas uas tsis muaj siab ntxiv, haum rau epoxy kua nplaum, α-cyanoacrylate kua nplaum, thib ob - tiam acrylic kua nplaum, unsaturated polyester kua nplaum thiab polyurethane. siab ntawm 0.1 ~ 0.3 MPa siv rau hnyav-raws li adhesives nrog rau phenolic - acetal kua nplaum, phenolic - nitrile butadiene kua nplaum, epoxy - nitrile butadiene kua nplaum, epoxy - nylon kua nplaum thiab polyimide kua nplaum; siab ntawm 0.3 ~ 0.5 MPa yog rau zaj duab xis, hmoov, raj, pellet adhesives thiab kub yaj kua nplaum, thiab siab dua tuaj yeem txhim kho lawv cov wettability.

3. Lub sijhawm kho yog hais txog lub sijhawm xav tau rau kev sib koom ua ke tag nrho nyob rau hauv qhov kub thiab txias. Cov nplaum sib txawv muaj qhov sib txawv ntawm qhov ceev: α-cyanoacrylate kua nplaum thiab kub yaj kua nplaum kho tam sim; chav - kub ceev - kho epoxy kua nplaum thiab thib ob - tiam acrylic kua nplaum siv sij hawm ob peb teev; epoxy polyamide kua nplaum xav tau ob peb hnub los kho kom tiav. Tsis tas li ntawd, lub sijhawm kho yog cuam tshuam los ntawm qhov kub thiab txias. Qhov kub siab dua ua rau lub sijhawm kho, thaum qhov kub tsis tshua muaj qhov txuas ntxiv nws, thiab qee cov kua nplaum yuav tsis kho tau rau hnub yog tias khaws cia hauv chav tsev kub.