Taw qhia
Adhesives yog qhov tseem ceeb hauv ntau yam ntawm peb lub neej niaj hnub, los ntawm cov kua nplaum ntawm lub hnab ntawv mus rau cov nplaum hauv cov khoom siv. Adhesives yog siv los koom nrog ob lossis ntau qhov chaw, ua rau lawv lo ua ke. Txawm li cas los xij, qhov ua tau zoo ntawm cov nplaum tuaj yeem cuam tshuam los ntawm ntau yam, suav nrog qhov kub, av noo, thiab siab. Hauv tsab xov xwm no, peb yuav tsom mus rau cov txiaj ntsig ntawm cov cua sov ntawm cov nplaum, teb cov lus nug, "Yuav ua li cas kom sov cov nplaum nplaum?"
Adhesive hauv paus
Ua ntej peb dhia mus tob rau hauv cov nyhuv ntawm tshav kub ntawm cov nplaum, nws yog ib qho tseem ceeb kom nkag siab txog cov ntsiab lus ntawm cov nplaum. Adhesives tuaj yeem muab faib ua ob pawg; cov uas yog chemically reactive thiab cov uas tsis. Chemically reactive adhesives yuav tsum muaj cov tshuaj tiv thaiv kab mob tshwm sim rau lawv kom muaj kev sib raug zoo, thaum uas tsis yog-reactive adhesives bonds los ntawm lub cev los yog mechanical txhais tau tias.
Adhesives feem ntau yog categorized raws li hom ntawv cog lus lawv tsim. Muaj tsib hom kev sib cog lus: cov khoom siv hluav taws xob, daim ntawv cog lus lub cev, cov khoom siv adsorptive, diffusion bonds, thiab cov khoom siv tshuaj lom neeg. Mechanical thiab lub cev daim ntawv cog lus yog hom tsis muaj zog tshaj plaws, thaum cov khoom siv tshuaj lom neeg muaj zog tshaj plaws.
Cov nyhuv ntawm tshav kub rau cov nplaum
Thaum tshav kub kub tuaj yeem cuam tshuam cov nplaum rau ntau txoj hauv kev. Thawj txoj hauv kev yog los ntawm kev hloov cov khoom ntawm lub cev ntawm cov nplaum. Thaum tshav kub kub tuaj yeem ua rau cov khoom nplaum nthuav dav, cog lus, lossis hloov cov duab, cuam tshuam rau cov khoom siv hluav taws xob lossis lub cev. Qee qhov xwm txheej, cua sov tuaj yeem ua rau cov nplaum ua kom tawg thiab tawg, ua rau lawv tsis zoo.
Qhov thib ob txoj kev tshav kub cuam tshuam rau cov nplaum yog los ntawm kev hloov cov tshuaj lom neeg ntawm cov nplaum. Thaum tshav kub kub tuaj yeem ua rau muaj tshuaj lom neeg uas ua rau cov nplaum nplaum, sib cais los ntawm substrate. Qee qhov xwm txheej, cua sov tuaj yeem ua rau cov nplaum nplaum sai heev, ua rau muaj qhov tsis muaj zog.
Qhov thib peb txoj kev tshav kub cuam tshuam rau cov nplaum yog los ntawm evaporating cov kuab tshuaj nyob rau hauv cov nplaum. Solvent-based adhesives muaj cov khoom ua kua uas evaporates tom qab thov, tawm hauv cov nplaum kom qhuav thiab daim ntawv cog lus. Thaum tshav kub kub tuaj yeem ua rau cov kuab tshuaj evaporate sai heev, ua rau muaj npuas lossis daim ntawv cog lus tsis muaj zog.
Cov nyhuv ntawm qhov kub thiab txias ntawm cov nplaum
Kub ua lub luag haujlwm tseem ceeb hauv kev ua haujlwm ntawm cov nplaum. Kev kub siab heev tuaj yeem ua rau cov nplaum ua tsis tau zoo. Qhov ntsuas kub zoo tshaj plaws rau cov nplaum yog feem ntau ntawm 60 degree F txog 75 degree F (15 degree txog 24 degree).
Qhov kub qis tuaj yeem ua rau cov khoom xyaw nquag hauv cov nplaum ua rau dormant, ua rau muaj kev sib txuas tsis muaj zog. Kev kub siab, ntawm qhov tod tes, tuaj yeem ua rau cov nplaum ua kua dej ntau dhau, ua rau muaj kev sib txuas tsis muaj zog. Qhov kub siab tshaj qhov kev pom zoo tuaj yeem ua rau cov nplaum tawg lossis yaj.
Hom adhesives thiab lawv cov tshav kub tsis kam
Tsis yog tag nrho cov nplaum yog tsim sib npaug thaum nws los txog rau cov cua sov. Nov yog qee qhov ntawm cov nplaum uas siv ntau thiab lawv cov cua sov ua haujlwm:
1. Cov nplaum nplaum kub - Cov nplaum nplaum kub yog cov cua sov uas tiv taus thiab tuaj yeem tiv taus kub txog 250 degree F (120 degree) ua ntej lawv cov khoom pib deteriorate.
2. Epoxy adhesives - Epoxy adhesives paub txog lawv cov tshuaj zoo heev thiab kub ua haujlwm. Lawv tuaj yeem tiv taus qhov kub txog li 450 ° F (232 ° C).
3. Acrylic adhesives - Acrylic adhesives paub txog lawv cov khoom zoo heev thaum tshav kub kub. Lawv tuaj yeem tiv taus kub txog 350 degree F (177 degree).
4. Cyanoacrylate adhesives - Cyanoacrylate adhesives yog kub rhiab heev thiab tuaj yeem tawg ntawm qhov kub siab tshaj 200 degree F (93 degree).
Xaus
Adhesives ua lub luag haujlwm tseem ceeb hauv ntau yam ntawm peb lub neej niaj hnub, los ntawm kev ntim khoom mus rau kev tsim kho. Thaum tshav kub kub tuaj yeem cuam tshuam rau cov nplaum hauv ntau txoj hauv kev, los ntawm kev hloov kho lawv lub cev thiab tshuaj lom neeg mus rau evaporating cov kuab tshuaj hauv cov nplaum. Yog li ntawd, nws yog ib qho tseem ceeb uas yuav tau xav txog qhov kub tsis kam ntawm cov nplaum ua ntej siv los xyuas kom meej nws cov txiaj ntsig thiab kev ua haujlwm ntev. Raws li pom, tsis yog tag nrho cov nplaum yog tsim sib npaug thaum nws los txog rau cov cua sov. Nws yog ib qho tseem ceeb los xaiv cov nplaum nplaum rau txoj haujlwm ntawm tes.