TOP 5 Elastomers Rau Gasket & Foob daim ntawv thov
Dab tsi yog elastomers? Lo lus muab los ntawm "elastic" - ib qho ntawm cov khoom tseem ceeb ntawm roj hmab. Cov lus "rubber" thiab "elastomer" yog siv sib hloov mus rau cov polymers nrog viscoelasticity-feem ntau hu ua "elasticity." Lub hauv paus ntsiab lus ntawm elastomers muaj xws li yooj, siab elongation thiab ib tug ua ke ntawm resilience thiab damping (damping yog ib yam khoom ntawm roj hmab uas ua rau nws hloov txhua yam zog rau cua sov thaum raug deflection). Cov khoom tshwj xeeb no ua rau elastomers yog cov khoom siv zoo tshaj plaws rau gaskets, seals, cais lossis lwm yam.
Tau ntau xyoo, elastomer ntau lawm tau migrated los ntawm ntuj roj hmab yielded los ntawm tsob ntoo latex rau heev engineered roj hmab compounding variations. Hauv kev tsim cov kev hloov pauv no, cov khoom tshwj xeeb tau txais nrog kev pab los ntawm cov khoom siv ntxiv xws li cov fillers lossis plasticizers lossis los ntawm cov ntsiab lus sib txawv hauv cov qauv copolymer. Lub evolution ntawm elastomer ntau lawm tsim ib tug myriad ntawm elastomer possibilities uas yuav engineered, manufactured thiab ua nyob rau hauv lub khw.
Txhawm rau xaiv cov khoom tsim nyog, ib tus yuav tsum xub xyuas cov txheej txheem rau kev ua haujlwm elastomer hauv gasket thiab foob daim ntawv thov. Thaum xaiv cov khoom siv tau zoo, cov engineers feem ntau yuav tsum tau siv ntau yam hauv kev xav. Cov kev pabcuam xws li kev ua haujlwm kub, ib puag ncig, kev sib cuag tshuaj, thiab kev xav tau ntawm txhua yam lossis lub cev yuav tsum tau ua tib zoo xav. Nyob ntawm daim ntawv thov, cov kev pabcuam no tuaj yeem cuam tshuam rau kev ua haujlwm thiab lub neej expectancy ntawm elastomer gasket lossis foob.
Nrog rau cov kev xav no hauv siab, cia peb tshuaj xyuas tsib ntawm cov feem ntau ua haujlwm elastomers rau gasket thiab foob daim ntawv thov.
1)Buna-N/Nitrile/NBR
Tag nrho cov ntsiab lus zoo sib xws, cov khoom siv roj hmab copolymer ntawm acrylonitrile (ACN) thiab butadiene, lossis Nitrile butadiene roj hmab (NBR), yog ib qho kev xaiv nrov uas feem ntau tau teev tseg thaum cov roj av, roj thiab / lossis roj muaj nyob.
Main Khoom:
Qhov kub siab tshaj plaws ntawm ~ -54 ° C txog 121 ° C (-65 ° - 250 ° F).
Zoo heev tiv taus roj, kuab tshuaj thiab roj.
Zoo abrasion tsis kam, txias txaus, tsim kua muag kuj.
Txaus siab rau cov ntawv thov nrog Nitrogen lossis Helium.
Tsis zoo tiv thaiv UV, ozone, thiab huab cua.
Tsis zoo rau ketones thiab chlorinated hydrocarbons.
Feem ntau siv rau hauv:
Aerospace & Automotive Fuel Handling Applications
Tus nqi txheeb ze:
Tsawg rau Nruab Nrab
2) EPDM
Cov muaj pes tsawg leeg ntawm EPDM pib nrog cov copolymerization ntawm ethylene thiab propylene. Ib tug thib peb monomer, diene, yog ntxiv kom cov khoom yuav vulcanized nrog sulfur. Cov yielded compound yog hu ua ethylene propylene diene monomer (EPDM).
Main Khoom:
Qhov kub siab tshaj plaws ntawm ~ -59 ° C txog 149 ° C (-75 ° - 300 ° F).
Zoo heev tshav kub, ozone thiab huab cua tsis kam.
Zoo tiv thaiv cov polar tshuaj thiab chav.
Zoo heev hluav taws xob insulating zog.
Zoo tiv thaiv rau ketones, zoo tib yam diluted acids, thiab alkalines.
Tsis zoo rau cov roj, roj av, thiab kerosene.
Tsis zoo rau aliphatic hydrocarbons, halogenated cov kuab tshuaj, thiab cov concentrated acids.
Feem ntau siv hauv:
Txias/Cold-Room Environments
Automotive Cooling System thiab Huab cua-Stripping Applications
Tus nqi txheeb ze:
Tsawg - Nruab Nrab
3) Neoprene
Cov tsev neeg neoprene ntawm hluavtaws roj hmab yog tsim los ntawm polymerization ntawm chloroprene thiab tseem hu ua polychloroprene los yog Chloroprene (CR).
Main Khoom:
Qhov kub siab tshaj plaws ntawm ~ -57 ° C txog 138 ° C (-70 ° - 280 ° F).
Zoo heev cuam tshuam, abrasion thiab nplaim resistant zog.
Zoo tsim kua muag thiab compression teeb.
Kev tiv thaiv dej zoo heev.
Zoo tiv taus rau nruab nrab raug rau ozone, UV, thiab huab cua nrog rau cov roj, roj, thiab cov kuab tshuaj me me.
Tsis zoo rau cov kua qaub, kuab tshuaj, esters, thiab ketones.
Tsis zoo rau chlorinated, aromatic, thiab nitro-hydrocarbons.
Feem ntau siv hauv:
Aquatic Environment Applications
Hluav taws xob
Tus nqi txheeb ze:
Tsawg
4) Silicone roj hmab
Silicone rubbers yog high-polymer vinyl methyl polysiloxanes, tsim raws li (VMQ), uas ua tau zoo heev nyob rau hauv nyuaj thermal ib puag ncig. Vim lawv cov purity, silicone roj hmab yog tshwj xeeb zoo haum rau kev tu cev.
Main Khoom:
Qhov kub siab tshaj plaws ntawm ~ -100 ° C txog 250 ° C (-148 ° - 482 ° F).
Zoo heev kub kuj.
Zoo heev UV, ozone thiab huab cua tsis kam.
Exhibits qhov zoo tshaj plaws uas tsis muaj kub yooj ntawm cov ntaub ntawv teev.
Zoo heev dielectric zog.
Lub zog tensile tsis zoo thiab tsim kua muag tsis kam.
Tsis zoo rau cov kuab tshuaj, roj, thiab concentrated acids.
Ua tsis taus pa.
Feem ntau siv hauv:
Daim ntawv thov zaub mov & dej haus
Pharmaceutical Environment Applications (Tshwj tsis yog chav sterilization)
Tus nqi txheeb ze:
Nruab Nrab - Siab
5) Fluoroelastomer / Viton®
Viton® fluoroelastomers yog categorized raws li lub npe FKM. Cov chav kawm ntawm elastomers no yog tsev neeg muaj cov copolymer ntawm hexafluoropropylene (HFP) thiab vinylidene fluoride (VDF lossis VF2).
Terpolymer ntawm tetrafluoroethylene (TFE), vinylidene fluoride (VDF) thiab hexafluoropropylene (HFP) thiab perfluoromethylvinylether (PMVE) uas muaj cov khoom tshwj xeeb raug soj ntsuam hauv qib siab.
FKM yog lub npe hu ua kev daws teeb meem ntawm kev xaiv thaum kub kub thiab tshuaj lom neeg yuav tsum tau ua.
Main Khoom:
Qhov kub siab tshaj plaws ntawm ~ -30 ° C txog 315 ° C (-20 ° - 600 ° F).
Qhov zoo tshaj plaws kub tsis kam.
Zoo heev UV, ozone thiab huab cua tsis kam.
Tsis zoo rau ketones, tsis tshua muaj molecular hnyav esters.
Tsis zoo rau cawv thiab nitro-muaj cov khoom sib txuas
Tsis zoo kuj tsis kub.
Feem ntau siv hauv:
Aquatic / SCUBA Sealing Applications
Automotive Fuel Applications nrog High Concentrations ntawm Biodiesel
Aerospace Seal Daim Ntawv Thov hauv Kev Txhawb Roj, Lubricant, thiab Hydraulic Systems
Tus nqi txheeb ze:
Siab
Post lub sij hawm: Apr-15-2020