Sealant imatanthawuza chinthu chosindikizira chomwe chimapunduka ndi mawonekedwe a malo osindikizira, sizovuta kuyenda, ndipo chimakhala ndi zomatira.
Ndi zomatira zomwe zimagwiritsidwa ntchito kudzaza mipata ya kasinthidwe kuti asindikize. Lili ndi ntchito zotsutsana ndi kutayikira, madzi, anti-vibration, kutsekemera kwa mawu ndi kutentha kwa kutentha. Nthawi zambiri, zinthu zowuma kapena zosawuma zowoneka ngati phula, utomoni wachilengedwe kapena utomoni wopangira, mphira wachilengedwe kapena mphira wopangira amagwiritsidwa ntchito ngati maziko, ndipo zodzaza ndi inert monga talc, dongo, kaboni wakuda, titanium dioxide ndi asbestosi zimawonjezeredwa. Plasticizers, solvents, machiritso othandizira, accelerators, etc. Iwo akhoza kugawidwa m'magulu atatu: zotanuka sealant, madzi kusindikiza gasket ndi kusindikiza putty. Amagwiritsidwa ntchito kwambiri posindikiza zomanga, zoyendetsa, zida zamagetsi ndi magawo.
Pali mitundu yambiri ya zosindikizira: Silicone sealants, polyurethane sealants, polysulfide sealants, acrylic sealants, anaerobic sealants, epoxy sealants, butyl sealants, neoprene sealants, PVC sealants, ndi asphalt sealants.
Waukulu zimatha sealant
(1) Mawonekedwe: Mawonekedwe a chosindikizira amatsimikiziridwa makamaka ndi kubalalitsidwa kwa chodzaza m'munsi. The filler ndi ufa wolimba. Pambuyo pobalalitsidwa ndi kneader, chopukusira ndi makina a mapulaneti, akhoza kumwazikana mofanana mu mphira wapansi kuti apange phala labwino. Kuchepa pang'ono kwa chindapusa kapena mchenga ndizovomerezeka komanso zachilendo. Ngati chodzazacho sichinabalalika bwino, tinthu tambiri ta coarse timawonekera. Kuphatikiza pa kubalalitsidwa kwa fillers, zinthu zina zidzakhudzanso maonekedwe a mankhwala, monga kusakaniza tinthu zonyansa, kutumphuka, etc. Milandu imeneyi amaonedwa akhakula mu maonekedwe.
(2) Kuuma
(3) Kulimba mtima
(4) Kutalikira
(5) Tensile modulus ndi kuthekera kosuntha
(6) Kumamatira ku gawo lapansi
(7) Extrusion: Uku ndikuchita ntchito yomanga zosindikizira Chinthu chomwe chimagwiritsidwa ntchito kusonyeza kuvutika kwa chosindikizira chikagwiritsidwa ntchito. Guluu wokhuthala kwambiri amakhala ndi vuto lokulitsa, ndipo zimakhala zovutirapo kumata akagwiritsidwa ntchito. Komabe, ngati guluu wapangidwa woonda kwambiri kungoganizira extrudability, izo zimakhudza thixotropy wa sealant. The extrudability akhoza kuyeza ndi njira yotchulidwa mu muyezo dziko.
(8) Thixotropy: Ichi ndi chinthu china cha ntchito yomanga ya sealant. Thixotropy ndizosiyana ndi fluidity, zomwe zikutanthauza kuti chosindikizira chikhoza kusintha mawonekedwe ake pansi pa zovuta zina, ndipo zimatha kusunga mawonekedwe ake pamene palibe mphamvu yakunja. mawonekedwe popanda kuyenda. Kutsimikiza kwa sag yotchulidwa ndi muyezo wa dziko ndilo chiweruzo cha thixotropy wa sealant.
Nthawi yotumiza: Nov-04-2022