Sealant yog cov khoom sib khi uas deforms rau hauv cov duab ntawm lub sealing nto, tsis yooj yim rau ntws, thiab muaj ib qho adhesiveness. Nws yog ib qho nplaum siv los sau qhov khoob ntawm cov khoom los ua lub luag haujlwm sealing. Nws muaj kev ua haujlwm ntawm kev tiv thaiv dej, tsis muaj dej, tiv thaiv kev vibration, suab rwb thaiv tsev thiab rwb thaiv tsev kub.
Nws feem ntau yog ua los ntawm cov ntaub ntawv qhuav lossis tsis qhuav qhuav xws li asphalt, natural resin lossis hluavtaws cob, roj hmab ntuj lossis hluavtaws roj hmab. Nws yog tsim nrog inert fillers xws li talc, av nplaum, carbon dub, titanium dioxide thiab asbestos, thiab ces ntxiv plasticizers, kuab tshuaj, curing agents, accelerators, thiab lwm yam.
Classification ntawm sealants
Sealant tuaj yeem muab faib ua elastic sealant, kua sealant gasket thiab peb pawg ntawm sealing putty.
Raws li tshuaj muaj pes tsawg leeg kev faib tawm:Nws tuaj yeem muab faib ua hom roj hmab, hom resin, hom roj raws li thiab ntuj polymer sealant. Qhov kev faib tawm no tuaj yeem paub cov yam ntxwv ntawm cov ntaub ntawv polymer, suav nrog lawv qhov kub thiab txias, sealing thiab yoog raws rau ntau yam xov xwm.
Roj hmab hom:Hom sealant no yog ua los ntawm roj hmab. Cov roj hmab siv feem ntau yog roj hmab polysulfide, silicone roj hmab, polyurethane roj hmab, neoprene roj hmab thiab butyl roj hmab.
Resin hom:Hom sealant no yog raws li cov resin. Feem ntau siv cov resins yog epoxy resin, unsaturated polyester resin, phenolic resin, polyacrylic resin, polyvinyl chloride resin, thiab lwm yam.
Roj-raws li:Hom sealant no yog roj-raws li. Cov roj siv feem ntau yog cov roj zaub xws li roj linseed, roj castor thiab roj tung, thiab roj tsiaj xws li roj ntses.
Classification raws li daim ntawv thov:nws tuaj yeem muab faib ua hom kub kub, txias tsis kam, hom siab thiab lwm yam.
Classification raws li zaj duab xis-forming zog:Nws tuaj yeem muab faib ua hom adhesion qhuav, qhuav peelable hom, tsis qhuav nplaum hom thiab semi-dry viscoelastic hom.
Classification los ntawm kev siv:Nws tuaj yeem muab faib ua cov sealant, tsheb sealant, rwb thaiv tsev sealant, ntim sealant, mining sealant thiab lwm yam.
Raws li kev ua tau zoo tom qab kev tsim kho:Nws tuaj yeem muab faib ua ob hom: curing sealant thiab semi-curing sealant. Ntawm lawv, curing sealant tuaj yeem muab faib ua nruj thiab yoog raws. Rigid sealant yog khoom tom qab vulcanization lossis solidification, thiab tsis tshua muaj elasticity, tsis tuaj yeem khoov, thiab feem ntau cov seams tsis tuaj yeem txav mus los; saj zawg zog sealants yog elastic thiab mos tom qab vulcanization. Lub sealant uas tsis yog-kho yog ib qho muag muag muag uas tseem tuav lub tshuab tsis ziab tom qab kev tsim kho thiab txuas ntxiv mus rau lub xeev saum npoo.
Post lub sij hawm: Feb-18-2022