Cov yam ntxwv ntawm EPDM roj hmab yog dab tsi?

1. Tsawg ntom ntom thiab cov ntawv sau siab
Ethylene-propylene roj hmab yog cov roj hmab nrog qis dua ntom ntom, nrog lub ntom ntom ntawm 0.87. Ib qho ntxiv, nws tuaj yeem sau nrog cov roj ntau thiab EPDM.
Ntxiv cov fillers tuaj yeem txo tus nqi ntawm cov khoom siv roj hmab thiab ua rau tus nqi siab ntawm ethylene prantas dej roj hmab nyoos roj hmab. Rau ethylene roj hmab nrog siab mooney tus nqi, lub cev thiab tshuab lub zog ntawm cov siab puv yog tsis tau txo qis.

2. Cov laus tsis kam
Ethylene-Propylene Roj Hmab Muaj huab cua zoo, cov pa hluav taws xob, cov pa dej hluav taws xob, roj-filling cov khoom thiab cov kua muag ntawm chav sov. Ethylene-propylene roj hmab cov khoom lag luam tuaj yeem siv rau lub sijhawm ntev ntawm 120 ° C, thiab tuaj yeem siv luv luv lossis sib quasy ntawm 150-200 ° C. Ntxiv cov tshuaj antioxidants tsim nyog tuaj yeem siv tau kub. EPDM roj hmab roj hmab hla nrog peroxide tuaj yeem siv nyob rau hauv cov xwm txheej hnyav. EPDM roj hmab tuaj yeem ncav cuag ntau dua 150h yam tsis muaj kev tawg hauv qab cov xwm txheej ntawm Ozone Concentration 50PPLHM thiab 30% ncab.

3. Corrosion Kuj
Vim tias cov roj hmab ethylene tsis muaj polarity thiab tsawg dua kev tsis txaus siab, muaj cov tshuaj ntxuav plab, cov pa dej, cov zaub ntsuab, ketones thiab greases. Tab sis nws muaj qhov ruaj khov nyob rau hauv cov rog thiab cov kuab tshuaj uas muaj ntxhiab (xws li roj av, benzene, thiab lwm yam) thiab roj ntxhia. Cov kev ua tau zoo tseem yuav txo qis qis hauv lub sijhawm ntev ntawm cov acid acid. Hauv ISO / rau 7620, ze li 400 hom ntawm corrosive gaseous thiab kua tshuaj tau sau lawv cov kev txiav txim siab ua haujlwm, thiab kev cuam tshuam ntawm cov tshuaj xeb ntawm cov roj hmab.

Cov o o o tus nqi /% hardness txo tus nqi cuam tshuam rau kev ua tau zoo
1 <10 <10 me ntsis lossis tsis muaj
2 10-20 <20 me dua
3 30-60 <30 nruab nrab
4> 60> 30 TEEB TAWM

4. Dej Vapor Kuj
Ethylene-propylene roj hmab muaj dej zoo dej vapor tiv thaiv thiab yog kwv yees kom tau zoo dua li nws cov cua sov tsis kam. Hauv 230 ℃ superheated chav, cov tsos ntawm epdm tseem hloov pauv tom qab yuav luag 100h. Txawm li cas los xij, raws li cov roj hmab zoo ib yam, silicone roj hmab, roj hmab fluorasilicone, thiab roj hmab muaj kev cuam tshuam loj heev hauv lub sijhawm luv luv.

5. Cov dej tsis kam ntawm cov dej tsis kam
Ethylene-propylene roj hmab kuj tau zoo tsis kam mus rau cov dej superheated, tab sis nws yog ze rau txhua qhov kev ua tshuab vulcanization. Ethylene-propylene roj hmab nrog dimorpholine disulfide thiab tmersed li cas rau hauv superheization hloov me ntsis, thiab cov khoom nthuav dav tsuas yog 0.3%.

6. Kev Ua Hluav Taws Xob
Ethylene-propylene roj hmab muaj hluav taws xob zoo nkauj rwb thaiv tsev thiab corrones roj hmab, thiab nws cov roj hmab sib txawv, polyethylene, polyethylene, polyethylene, polyethylene, polyethylene, polyethylene, polyethylene, polyethylene, polyethylene, polyethylene, polyethylene, polyethylene, polyethylene, polyethylene, polyethylene, polyethylene, polyethylene, polyethylene, polyethylene, polyethylene, polyethylene, polyethylene, polyethylene, polyethylene, polyethylene, polyethylene, polyethylene, polyethylene, polyethylene, polyethylene, polyethylene, polyethylene, polyethylene thiab tus ntoo khaublig-sib txuas.

7. Yooj Yim
Vim tias tsis muaj cov qauv polar nyob rau hauv cov qauv molecular-propylene-cov roj hmab muaj peev xwm tswj tau qis dua, thiab roj hmab sib ceg, thiab tseem tuaj yeem tswj hwm ntawm cov kub tsawg.

8. Adhesion
Ethylene-propylene roj hmab tsis muaj cov pab pawg nquag vim nws cov qauv molecular thiab muaj cov cohesive hluav taws xob. Tsis tas li ntawd, cov roj hmab yooj yim rau Bloom, thiab nws tus kheej-adhesion thiab kev sib nrig sib ua tau zoo heev.