2 Sealant classification method
2.1 Kev faib tawm raws li daim ntawv thov thiab cov kev xav tau siv
Nws tuaj yeem muab faib ua cua sov-resistant, txias-resistant, siab-resistant, roj-resistant, dej-resistant, hnyav-resistant, tshuaj-resistant thiab thiaj li nyob.
Qhov zoo ntawm qhov kev faib tawm no yog kom meej meej qhia cov yam ntxwv tseem ceeb ntawm cov khoom, uas yooj yim rau kev xaiv daim ntawv thov. Txawm li cas los xij, nws yuav tsum nkag siab tias cov yam ntxwv ntawm cov txheej txheem no yog txheeb ze, thiab hauv kev siv tiag tiag, kev sim tiag tiag yuav tsum tau ua.
2.2 Kev faib tawm los ntawm cov khoom xyaw tseem ceeb
Nws tuaj yeem muab faib ua hom resin, hom roj hmab, hom roj hloov, hom ntuj polymer thiab lwm yam.
Qhov kev faib tawm no tuaj yeem siv los txiav txim siab qhov ruaj khov ntawm cov sealant rau nruab nrab thiab lwm yam khoom siv lub cev thiab tshuaj raws li cov khoom siv ntawm cov khoom tseem ceeb rau kev siv. Txawm li cas los xij, vim tias feem ntau cov sealants feem ntau yog ua los ntawm ntau tshaj ob lub polymers, kev faib tawm los ntawm kev sib xyaw ua ke ib leeg tsis zoo txaus.
2.3 Kev faib tawm los ntawm cov yeeb yaj kiab tsim cov khoom tom qab txheej
(1) Dry sealant: Cov sealant no yog muab los ntawm cov nplaum thiab muaj zog adhesion. Nws feem ntau muaj cov kuab tshuaj. Tom qab txheej txheej, cov kuab tshuaj volatilizes thiab kho ntawm qhov chaw sib txuas. Nws muaj cov cua sov ua haujlwm zoo thiab kev ua haujlwm siab, tab sis tsis zoo detachability; qhuav thiab peelable hom kuj muaj hnyav. Tom qab cov kuab tshuaj yog volatilized, nws tsim ib tug mos thiab saj zawg zog zaj duab xis. Nws muaj kev poob siab zoo, kev cuam tshuam, thiab tev taus, tab sis feem ntau nws yog vim qhov hnyav hauv cov kua nplaum yog volatile. , Tsis yog qhov zoo rau kev khaws cia thiab thaj chaw loj txheej txheej.
(2) Semi-drying sealant: Cov nplaum nplaum tsim tom qab cov kuab tshuaj volatilizes nyob rau hauv semi-drying hnyav-raws li sealant tsis nyuaj rau lub sij hawm ntev thiab tswj tau ib co viscoelasticity; hom reactive feem ntau tsis muaj cov kuab tshuaj. Thaum nws yog siv, nws reacts chemically. Viscoelastic nplaum zaj duab xis yog kho, xws li silicone sealant.
(3) Cov sealant tsis ziab: Feem ntau ntawm cov sealants no tsis muaj cov kuab tshuaj. Tom qab txheej, lawv ib txwm nyob twj ywm qhuav thiab nplaum. Lawv tsis tawg thiab tev tawm nyob rau hauv txhua yam kev co thiab kev cuam tshuam, thiab muaj zoo detachability. Kev sib deev. Cov kuab tshuaj muaj viscosity tsawg thiab yooj yim rau kev thov. Cov kuab tshuaj tsis muaj kuab tshuaj ntau dua los yog muab tshuaj txhuam zoo li thiab muaj qhov sib khi loj dua. Qhov no yog tam sim no feem ntau siv sealant hauv kev lag luam machinery.