Klassifikaasje fan polyurethane sealen strip
Polyurethane iepen sealing strip is basearre op ferskate applikaasje metoaden en ferskillende fysike eigendom easken, it brûken fan ferskate grûnstoffen, it mingjen fan materiaal A en materiaal B neffens in bepaalde ferhâlding, en dan giet it yn 'e holte fan' e groove, de skimmel, of direkt op 'e basis diel. Op in plat oerflak, it feroaret fan in floeistof nei in elastyske sealing strip troch in-situ foaming. Sûnt de polyurethane reaktyf materiaal wurdt net foarme en foamed yn 'e skimmel, mar wurdt frij foamed en foarme yn de iepen steat yn it fleantúch of groove, it hjit in polyurethane iepen dichtstrip. D'r binne benammen twa soarten polyurethane iepen sealen: platte sealen en groove sealen.
platte seal
De platte sealing strip ferwiist nei de sealing strip dy't getten is yn in healrûne seksje op it oerflak fan 'e sealing strip. Om te berikken de fereaske healrûne seksje nei curing, it is nedich om te soargjen dat jo streame by it jitten, wat fereasket dat materiaal A en it ferhurde mingsel in hegere viskositeit hawwe, dat is in thixotropic agint. De platte sealing strip wurdt benammen brûkt foar it sealing fan it switchboard en de doar paniel fan de elektryske kontrôle kabinet, ensfh.
Groove seal
In groefdichtingsstrip ferwiist nei in dichtingsstrip dy't yn in rjochthoekige seksje yn in dichtgroef getten is en benammen brûkt wurdt foar lampshade sealing, auto filters, ensfh. Om te krijen in sealing strip mei in glêd oerflak en platte gewrichten, it must be boring and can flow evenly in the sealing groove during pouring before foaming. This requires material A and the reacted mixture to have a low viscosity, which is low-viscosity pouring glue.
Polyurethane sealing strip application
The main application of polyurethane sealant is the civil construction industry, the transportation industry, ensafuorthinne. Bygelyks, in Japan, about 75-80% of polyurethane sealants are used in construction, 15% are used in automobiles, masines manufacturing, ensfh., en 5% are used in civil engineering and other aspects.
The specific applications in construction include: the connection of building materials such as concrete prefabricated parts and the filling and sealing of construction joints, the sealing of joints around the wooden frames of doors and windows and between the concrete of walls, and the pasting of lightweight structures on buildings (such as curtain walls) Caulking, waterproof caulking of balconies, swimming pools, bathrooms, and other facilities, sealing of joints of air conditioners and other systems, sealing of heat-insulating double-glazing, heat-insulating window frames, ensfh.
The application of polyurethane sealant in automobiles includes the assembly and sealing of windows (mainly windshield glass), assembly of body and other components, ensfh.
In terms of civil engineering, polyurethane sealants are used for caulking high-grade roads, bridges, airstrips, ensfh. The sealing the connection, the sealing of the connection of subway tunnels and other underground tunnels, ensfh.
Polyurethane sealant can also be used for flexible joints of cables (such as underground cables) and potting of electronic components to prevent dust and shock; it kin ek brûkt wurde foar bonding en sealing fan waarmte-isolaasjesystemen lykas koelauto's, kâlde opslach isolaasje lagen en lege-temperatuer containers.
