1. Tsawg ceev thiab siab filling
Ethylene-propylene roj hmab yog cov roj hmab uas muaj qhov ntom ntom, nrog qhov ntom ntawm 0.87.Tsis tas li ntawd, nws tuaj yeem sau nrog ntau cov roj thiab EPDM.
Ntxiv cov fillers tuaj yeem txo cov nqi ntawm cov khoom siv roj hmab thiab ua rau tus nqi siab ntawm ethylene propylene roj hmab raw roj hmab.Rau ethylene propylene roj hmab nrog cov nqi siab Mooney, lub zog ntawm lub cev thiab lub zog ntawm kev ua haujlwm siab tsis txo qis heev.
2. Kev laus tsis kam
Ethylene-propylene roj hmab muaj cov huab cua zoo heev, ozone tsis kam, kub tsis kam, acid thiab alkali tsis kam, dej vapor tsis kam, xim stability, hluav taws xob khoom, roj-filling zog thiab fluidity ntawm chav tsev kub.Cov khoom siv roj hmab Ethylene-propylene tuaj yeem siv tau ntev ntawm 120 ° C, thiab tuaj yeem siv luv luv lossis sib nrug ntawm 150-200 ° C.Ntxiv cov tshuaj antioxidants tsim nyog tuaj yeem ua rau nws qhov kub thiab txias.EPDM roj hmab cross-linked nrog peroxide tuaj yeem siv rau hauv cov xwm txheej hnyav.EPDM roj hmab tuaj yeem ncav cuag ntau dua 150h yam tsis muaj kev tawg nyob rau hauv cov xwm txheej ntawm ozone concentration 50pphm thiab 30% stretching.
3. Corrosion kuj
Vim hais tias ethylene propylene roj hmab tsis muaj polarity thiab qis qis ntawm unsaturation, nws muaj kev tiv thaiv zoo rau ntau yam tshuaj polar xws li cawv, acids, alkalis, oxidants, refrigerants, detergents, tsiaj thiab zaub roj, ketones thiab greases.Tab sis nws muaj kev ruaj ntseg tsis zoo hauv cov roj ntsha thiab cov tshuaj tsw qab (xws li roj av, benzene, thiab lwm yam) thiab cov roj ntxhia.Qhov kev ua tau zoo kuj tseem yuav txo qis hauv kev ua haujlwm ntev ntawm cov kua qaub.Nyob rau hauv ISO / TO 7620, ze li ntawm 400 hom corrosive gaseous thiab kua tshuaj tau sau cov ntaub ntawv ntawm ntau yam roj hmab zog, thiab tau teev 1-4 qib los qhia lawv qib ntawm kev ua, thiab qhov cuam tshuam ntawm cov tshuaj corrosive rau cov khoom roj hmab.
Qib Volume o tus nqi /% Hardness txo tus nqi cuam tshuam rau kev ua haujlwm
1 <10 <10 me ntsis los yog tsis muaj
2 10-20 <20 me
3 30-60 <30 nruab nrab
4> 60> 30 mob hnyav
4. Dej vapor tsis kam
Ethylene-propylene roj hmab muaj dej vapor kuj zoo heev thiab kwv yees tias yuav zoo dua li nws cov cua sov.Hauv 230 ℃ superheated chav, qhov tsos ntawm EPDM tseem tsis hloov tom qab ze li ntawm 100h.Txawm li cas los xij, nyob rau hauv tib lub sijhawm, fluorine roj hmab, silicone roj hmab, fluorosilicone roj hmab, butyl roj hmab, nitrile roj hmab, thiab cov roj hmab ntuj tau ntsib kev puas tsuaj loj tom qab lub sijhawm luv luv.
5. Superheated dej tsis kam
Ethylene-propylene roj hmab kuj muaj kev tiv thaiv zoo rau cov dej superheated, tab sis nws muaj feem xyuam nrog txhua lub tshuab vulcanization.Ethylene-propylene roj hmab nrog dimorpholine disulfide thiab TMTD raws li cov vulcanization system, tom qab tau muab tso rau hauv dej superheated ntawm 125 ° C rau 15 lub hlis, cov khoom siv kho tshuab hloov me ntsis, thiab qhov ntim nthuav dav tsuas yog 0.3%.
6. Kev ua haujlwm hluav taws xob
Ethylene-propylene roj hmab muaj cov khoom siv hluav taws xob zoo heev thiab tiv thaiv corona, thiab nws cov khoom siv hluav taws xob zoo dua los yog ze rau cov roj hmab styrene-butadiene, chlorosulfonated polyethylene, polyethylene thiab cross-linked polyethylene.
7. Yooj yim
Vim tias tsis muaj cov polar substituents nyob rau hauv cov qauv molecular ntawm ethylene-propylene roj hmab, lub zog cohesive ntawm lub molecule yog tsawg, thiab cov saw molecular muaj peev xwm tswj tau yooj yim nyob rau hauv ib tug ntau yam, thib ob tsuas yog ib tug natural negotiable thiab butadiene roj hmab, thiab tseem yuav ua tau. khaws cia ntawm qhov kub thiab txias.
8. Adhesion
Ethylene-propylene roj hmab tsis muaj pab pawg ua haujlwm vim nws cov qauv molecular thiab muaj zog cohesive tsawg.Tsis tas li ntawd, cov roj hmab yog ib qho yooj yim rau tawg, thiab nws tus kheej-adhesion thiab kev sib nrig sib adhesion yog heev tsis zoo.
Post lub sij hawm: Nov-17-2021