Sealant hais txog cov khoom sealing uas deforms nrog cov duab ntawm cov khoom sib khi, tsis yooj yim ntws, thiab muaj qee yam nplaum.
Nws yog cov nplaum siv los sau cov teeb meem teeb tsa rau kev sib khi. Nws muaj cov haujlwm ntawm kev tiv thaiv, qaug dej, anti--rwb thaiv tsev thiab rwb thaiv tsev kub. Feem ntau, qhuav lossis tsis-qhuav cov ntaub ntawv viscous xws li aspthetic resin, cov khoom siv roj hmab lossis cov khoom siv hluav taws xob lossis cov pa roj av, cov pa roj caranium thiab asbestos ntxiv. Cov hnab looj tes yas, cov kuab tshuaj, kev kho cov neeg sawv cev, cov neeg sawv cev nrawm, thiab lwm yam tuaj yeem faib ua peb pawg, ua kua sealing gasket thiab sealing putty. Nws yog dav siv nyob rau hauv kev sib khi ntawm kev tsim kho, kev thauj mus los, seev tshuab hluav taws xob thiab qhov chaw.
Muaj ntau hom ntxaij: Silicone sealants, polyurethan sealants, cov kab mob acryfic, neoplene cov foob, cov xov xwm anaOple, cable as khauj qab zib, thiab asphalt forrants.
Cov khoom tseem ceeb ntawm kev foob
(1) tsos: cov tsos ntawm lub tshuab luam yeeb yog feem ntau txiav txim siab los ntawm kev dispersion ntawm cov muab tub lim rau hauv lub hauv paus. Tus muab tub lim yog cov hmoov tawv. Tom qab tau tawg los ntawm kneader, ib grinder thiab ib lub ntiaj teb lub tshuab, nws tuaj yeem yog tusyees impersed hauv cov roj hmab los ua cov khoom noj zoo. Ib qho me me ntawm me ntsis kev nplua lossis xuab zeb siv tau thiab ib txwm muaj. Yog hais tias tus muab tub lim tsis zoo dispersed, ntau coearse coears yuav tshwm sim. Ntxiv rau cov dispersion ntawm fillers, lwm yam yuav cuam tshuam txog cov khoom, xws li sib xyaw ntawm kev ua kom tawg, thiab lwm yam yog suav tias yog cov tsos.
(2) hardness
(3) lub zog tensile
(4) elongation
(5) Tensile Modulus thiab kev hloov chaw
(6) adhesion rau substrate
(7) Extrusion: Qhov no yog kev ua yeeb yam ntawm kev tsim kev tsim kho ib yam khoom siv los qhia qhov nyuaj ntawm kev foob thaum nws siv. Cov kua nplaum tuab yuav muaj kev tsis txaus siab, thiab nws yuav muaj zog heev rau kua nplaum thaum nws siv. Txawm li cas los xij, yog tias cov kua nplaum yog ua dhau yooj ntau tsuas yog txiav txim siab extrudability, nws yuav cuam tshuam rau lub thixotrotropy ntawm kev foob. Lub extrudability tuaj yeem ntsuas los ntawm cov qauv teev hauv lub teb chaws tus qauv.
(8) Thixotropy: Qhov no yog lwm yam ntawm kev ua haujlwm ntawm kev foob. Thixotropy yog qhov txawv ntawm fluidity, uas txhais tau hais tias kev sib foob tsuas yog hloov nws lub siab, thiab muaj peev xwm tswj nws cov duab thaum tsis muaj lub zog sab nraud. cov duab tsis muaj ntws. Kev txiav txim siab ntawm sag cov qauv yog kev txiav txim ntawm thixotropy ntawm kev foob.
Lub sij hawm ncua: Nov-04-2022