Qhov txawv ntawm FKM thiab EPDM yog dab tsi?
Kev xaiv cov khoom siv O-ring zoo tuaj yeem ua rau qhov sib txawv ntawm lub foob uas ruaj khov thiab txhim khu kev qha, lossis yog tias nws yuav ua tsis tau sai, ua rau raug nqi, tsis xav txog kev poob qis. FKM thiab EPDM yog ob qho khoom sib khi uas paub txog lawv txoj kev ntseeg siab. Tab sis qhov txawv ntawm FKM thiab EPDM yog dab tsi? TRP Polymer Solutions piav qhia txhua yam hauv qhov kev sib piv FKM vs EPDM.
Qhov sib txawv ntawm FKM thiab EPDM
Ob leeg FKM thiab EPDM yog cov khoom siv ruaj khov heev nrog cov cua sov thiab oxidation tsis kam. Txawm li cas los xij, muaj qee qhov sib txawv ntawm ob lub polymers, uas tau piav qhia hauv qab no.
Fluoroelastomer (FKM)
Fluoroelastomer (FKM) yog tus cwj pwm los ntawm nws cov ntawv cog lus muaj zog carbon-fluorine, uas muab cov tshuaj zoo heev, kub thiab oxidation tsis kam. FKM kuj muaj ntau qhov kev ua haujlwm kub ntawm -45 degree rau +204 degree, muaj cov khoom siv zoo, thiab nws qhov ntom ntom ua rau nws zoo siab. Kawm ntxiv txog cov qauv tshuaj ntawm FKM ntawm no.
FKM yog tsim rau tawg decompression, CIP, SIP thiab FDA daim ntawv thov. Nws yog qhov zoo tagnrho rau kev tuav thiab thauj cov ntaub ntawv uas muaj cov tshuaj thiab cov roj, nrog rau qhov kub thiab tawg ib puag ncig xws li roj thiab roj, automotive thiab aerospace industries.
Ntawm qhov tsis zoo, FKM swells hauv cov kuab tshuaj fluorinated thiab tsis tuaj yeem siv nrog cov hlau molten lossis gaseous alkali. FKM roj hmab yog cov khoom lag luam zoo vim nws cov tshuaj muaj pes tsawg leeg thiab cov tshuaj tiv thaiv tom qab. Yog li ntawd, nws yog kim dua li lwm yam uas tsis yog-fluorinated hydrocarbons, nrog rau cov qib cryogenic yog kim heev.
Xaiv qhov tsis ncaj ncees lawm qib ntawm FKM tuaj yeem ua rau tsis ua haujlwm sai, vim li ntawd nws yog ib qho tseem ceeb kom nrhiav tswv yim thaum txiav txim siab siv FKM.
EPDM
Ethylene-propylene-diene-monomer (EPDM) yog cov roj hmab uas muaj zog thiab muaj ntau yam. EPDM muaj kev tiv thaiv zoo rau ozone, tshav ntuj thiab huab cua, ua rau nws yog ib qho khoom siv tshwj xeeb rau kev siv sab nraum zoov. Ob peb cov roj hmab tuaj yeem tiv taus qhov kub thiab txias thiab EPDM. Nrog rau kev khiav hauj lwm kub mus rau -50 degree (qhov siab tshaj plaws +150 degree), EPDM yog ib qho kev xaiv txhim khu kev qha rau sub-zero kub.
EPDM compresses zoo thiab muaj zog heev rau tearing, abrasion, thiab chav. Nws tag nrho cov nyob ib ncig ntawm lub durability tau coj mus rau nws siv nyob rau hauv ntau yam kev siv, xws li "O" rings, automotive cua txias tshuab, thiab rwb thaiv tsev rau lub freezer seals. Thaum EPDM muaj kev tiv thaiv zoo rau dilute acids, ketones, thiab cov hauv paus, nws tsis yog resistant rau roj, roj, thiab cov kuab tshuaj tsis-polar. Nws yeej tsis yog qhov kev xaiv tsim nyog rau kev siv petrochemical.
FKM vs EPDM: Koj Yuav Xaiv Qhov Twg?
Rau cov khoom siv qis qis nrog txhua yam khoom koj xav tau rau kev siv sab nraum zoov, EPDM yog tus nqi zoo. Cov roj hmab hluavtaws ruaj khov no tsis tuaj yeem degrade thaum raug UV rays thiab tuaj yeem tiv taus lub sijhawm ntev nrog chav thiab qee cov kua qaub.
Txawm li cas los xij, yog tias koj daim ntawv thov xav tau cov qauv siab tshaj plaws ntawm tshuaj lom neeg, cua sov, thiab oxidation tsis kam - thiab nyiaj txiag tsis yog koj qhov kev txhawj xeeb tseem ceeb - FKM yog cov khoom lag luam zoo uas yuav muab cov txiaj ntsig zoo rau koj cov peev txheej.
Peb cia siab tias nrog qhov kev sib piv ntawm FKM vs. EPDM, koj yuav muaj kev nkag siab zoo txog qhov zoo thiab qhov tsis zoo ntawm txhua yam khoom. Peb yuav tsum hais qhia tias txoj hauv kev zoo tshaj plaws los xaiv cov khoom tsim nyog tshaj plaws rau koj daim ntawv thov yog kev sab laj tus kws tshaj lij uas tuaj yeem taug kev koj los ntawm ntau qib khoom siv thiab phim koj nrog cov kev daws teeb meem zoo tshaj plaws.