TOP 5 Elastomers Rau Gasket & Seal Daim Ntawv Thov
Cov elastomers yog dab tsi? Lo lus no yog los ntawm lo lus "elastic" - ib qho ntawm cov yam ntxwv tseem ceeb ntawm roj hmab. Cov lus "rubber" thiab "elastomer" yog siv sib pauv los hais txog cov polymers nrog viscoelasticity - feem ntau hu ua "elasticity." Cov yam ntxwv ntawm elastomers suav nrog kev ywj pheej, kev ntev ntev thiab kev sib xyaw ua ke ntawm kev ywj pheej thiab kev damping (damping yog ib yam ntxwv ntawm roj hmab uas ua rau nws hloov lub zog tshuab mus rau cua sov thaum raug deflection). Cov yam ntxwv tshwj xeeb no ua rau elastomers yog cov khoom siv zoo tagnrho rau gaskets, seals, isolates, thiab lwm yam.
Tau ntau xyoo los lawm, kev tsim cov roj hmab elastomer tau hloov los ntawm cov roj hmab ntuj uas tsim los ntawm cov ntoo latex mus rau cov roj hmab sib xyaw ua ke uas tau tsim kho zoo heev. Thaum tsim cov kev hloov pauv no, cov yam ntxwv tshwj xeeb tau txais los ntawm kev pab ntawm cov khoom ntxiv xws li cov khoom sau lossis cov yas lossis los ntawm kev sib txawv ntawm cov ntsiab lus hauv cov qauv copolymer. Kev hloov pauv ntawm kev tsim cov roj hmab elastomer tsim ntau yam elastomer uas tuaj yeem tsim kho, tsim khoom thiab muaj nyob hauv kev lag luam.
Yuav kom xaiv tau cov khoom siv zoo, ib tug yuav tsum xub tshuaj xyuas cov qauv rau kev ua haujlwm ntawm elastomer hauv gasket thiab seal applications. Thaum xaiv cov khoom siv zoo, cov engineers feem ntau yuav tsum xav txog ntau yam. Cov xwm txheej kev pabcuam xws li qhov kub thiab txias ua haujlwm, cov xwm txheej ib puag ncig, kev sib cuag tshuaj lom neeg, thiab cov kev cai kho tshuab lossis lub cev txhua yam yuav tsum tau xav txog kom zoo. Nyob ntawm daim ntawv thov, cov xwm txheej kev pabcuam no tuaj yeem cuam tshuam loj heev rau kev ua haujlwm thiab lub neej ntev ntawm elastomer gasket lossis seal.
Nrog rau cov tswv yim no hauv siab, cia peb tshuaj xyuas tsib ntawm cov elastomers uas siv ntau tshaj plaws rau gasket thiab seal applications.
1)Buna-N/Nitrile/NBR
Txhua lo lus txhais tau zoo sib xws, cov roj hmab sib xyaw ua ke ntawm acrylonitrile (ACN) thiab butadiene, lossis Nitrile butadiene roj hmab (NBR), yog qhov kev xaiv nrov uas feem ntau teev thaum roj av, roj thiab / lossis roj av muaj.
Cov Khoom Tseem Ceeb:
Qhov Kub Tshaj Plaws ntawm ~ -54 ° C txog 121 ° C (-65 ° - 250 ° F).
Zoo heev tsis kam rau cov roj, cov kuab tshuaj thiab roj.
Kev ua haujlwm zoo, kev ntws txias, kev tsim kua muag.
Zoo dua rau cov ntawv thov nrog Nitrogen lossis Helium.
Tsis kam tiv taus UV, ozone, thiab huab cua.
Tsis kam rau ketones thiab chlorinated hydrocarbons.
Feem ntau siv rau hauv:
Cov Ntawv Thov Siv Rau Kev Siv Roj Av Thiab Tsheb
Tus nqi sib piv:
Qis mus rau Nruab Nrab
2) EPDM
Cov khoom sib xyaw ntawm EPDM pib nrog kev sib xyaw ua ke ntawm ethylene thiab propylene. Ib qho monomer thib peb, diene, raug ntxiv rau kom cov khoom siv tuaj yeem vulcanized nrog sulfur. Cov khoom tsim tawm hu ua ethylene propylene diene monomer (EPDM).
Cov Khoom Tseem Ceeb:
Qhov Kub Tshaj Plaws ntawm ~ -59°C txog 149°C (-75° – 300°F).
Kev tiv taus cua sov zoo heev, ozone thiab huab cua.
Zoo tiv taus cov khoom polar thiab cov pa dej.
Cov khoom siv hluav taws xob zoo heev.
Zoo tsis kam rau ketones, cov kua qaub diluted, thiab alkalines.
Tsis kam rau roj, roj av, thiab kerosene.
Tsis kam rau aliphatic hydrocarbons, halogenated solvents, thiab concentrated acids.
Feem ntau siv rau hauv:
Chaw Txias/Chav Txias
Kev Siv Lub Tshuab Txias Tsheb thiab Kev Siv Huab Cua
Tus nqi sib piv:
Qis - Nruab Nrab
3) Neoprene
Tsev neeg neoprene ntawm cov roj hmab hluavtaws yog tsim los ntawm polymerization ntawm chloroprene thiab tseem hu ua polychloroprene lossis Chloroprene (CR).
Cov Khoom Tseem Ceeb:
Qhov Kub Tshaj Plaws ntawm ~ -57°C txog 138°C (-70° – 280°F).
Kev cuam tshuam zoo heev, kev puas tsuaj thiab cov khoom tiv taus hluav taws.
Zoo tear tsis kam thiab compression teeb tsa.
Tsis kam dej zoo heev.
Zoo tiv taus rau qhov raug rau ozone, UV, thiab huab cua nrog rau cov roj, roj, thiab cov kuab tshuaj me me.
Tsis kam rau cov kua qaub muaj zog, cov kuab tshuaj, esters, thiab ketones.
Tsis kam rau chlorinated, aromatic, thiab nitro-hydrocarbons.
Feem ntau siv rau hauv:
Cov Ntawv Thov Ib puag ncig hauv dej
Hluav taws xob
Tus nqi sib piv:
Qis
4) Silicone
Cov roj hmab silicone yog cov polymer vinyl methyl polysiloxanes siab, uas tau xaiv los ua (VMQ), uas ua haujlwm tau zoo heev hauv cov chaw kub thiab txias. Vim lawv qhov huv si, cov roj hmab silicone yog qhov tsim nyog rau kev siv huv.
Cov Khoom Tseem Ceeb:
Qhov Kub Tshaj Plaws ntawm ~ -100 ° C txog 250 ° C (-148 ° - 482 ° F).
Kev ua haujlwm kub zoo heev.
Kev tiv thaiv UV, ozone thiab huab cua zoo heev.
Qhia txog qhov yooj ywm zoo tshaj plaws ntawm cov ntaub ntawv teev tseg.
Cov khoom dielectric zoo heev.
Lub zog tensile tsis zoo thiab kev tsim kua muag tsis kam.
Tsis kam rau cov kuab tshuaj, roj, thiab cov kua qaub concentrated.
Tsis kam ua pa.
Feem ntau siv rau hauv:
Cov Ntawv Thov Khoom Noj & Dej Haus
Cov Ntawv Thov Ib puag ncig tshuaj (Tshwj tsis yog kev ua kom tsis muaj pa)
Tus nqi sib piv:
Nruab Nrab - Siab
5) Fluoroelastomer/Viton®
Cov Viton® fluoroelastomers raug muab faib ua pawg raws li lub npe FKM. Cov chav kawm elastomers no yog ib tsev neeg uas muaj cov copolymers ntawm hexafluoropropylene (HFP) thiab vinylidene fluoride (VDF lossis VF2).
Cov terpolymers ntawm tetrafluoroethylene (TFE), vinylidene fluoride (VDF) thiab hexafluoropropylene (HFP) nrog rau perfluoromethylvinylether (PMVE) uas muaj cov khoom tshwj xeeb tau pom nyob rau hauv cov qib siab heev.
FKM yog lub npe hu ua qhov kev daws teeb meem uas koj xaiv thaum xav tau qhov kub thiab txias thiab tiv taus tshuaj lom neeg.
Cov Khoom Tseem Ceeb:
Qhov Kub Tshaj Plaws ntawm ~ -30 ° C txog 315 ° C (-20 ° - 600 ° F).
Qhov zoo tshaj plaws kub ua haujlwm.
Kev tiv thaiv UV, ozone thiab huab cua zoo heev.
Tsis kam rau ketones, cov esters hnyav molecular qis.
Tsis kam rau cov cawv thiab cov tshuaj nitro
Tsis kam ua rau kub tsawg.
Feem ntau siv rau hauv:
Cov Ntawv Thov Sealing Hauv Dej / SCUBA
Cov Kev Siv Roj Tsheb Uas Muaj Biodiesel Ntau
Cov Ntawv Thov Aerospace Seal hauv Kev Txhawb Nqa Roj, Lubricant, thiab Hydraulic Systems
Tus nqi sib piv:
Siab
Lub sijhawm tshaj tawm: Plaub Hlis-15-2020