Izinto eziqhelekileyo zerabha--impawu ze-EPDM

Izinto eziqhelekileyo zerabha--impawu ze-EPDM

I-advanteji:
Ukumelana nokuguga okuhle kakhulu, ukumelana nemozulu, ukugqunywa kombane, ukuxhathisa ukubola kweekhemikhali kunye nefuthe elithambileyo.

Izinto ezingeloncedo:
Isantya esicothayo sokunyanga; Kunzima ukudityaniswa nezinye iirubha ezingaxutywanga, kwaye ukuzincamathela kunye nokuncamathelana kumbi kakhulu, ngoko ke ukusebenza kolungiso kumbi.

I-Ningbo Yokey Automotive Parts Co., Ltd igxile ekusombululeni iingxaki zezinto zerabha zabathengi kunye nokuyila ukwakheka kwezinto ezahlukeneyo ngokusekwe kwiimeko ezahlukeneyo zesicelo.

Iipropati: iinkcukacha
1. Ubuninzi obuphantsi kunye nokuzaliswa okuphezulu
Irabha ye-ethylene propylene luhlobo lwerabha kunye noxinzelelo oluphantsi lwe-0.87. Ukongezelela, inani elikhulu leoli linokuzaliswa kwaye iifayili zinokongezwa, ezinokunciphisa iindleko zeemveliso zerabha kwaye zenze ixabiso eliphezulu lerabha eluhlaza ye-ethylene propylene rubber. Ukongezelela, irabha ye-ethylene propylene enexabiso eliphezulu leMoneyy, amandla omzimba kunye nomatshini emva kokuzaliswa okuphezulu akuyi kuncitshiswa kakhulu.

2. Ukumelana nokuguga
Irabha ye-ethylene propylene inokumelana nemozulu ebalaseleyo, ukumelana ne-ozone, ukumelana nobushushu, ukuxhathisa kwe-asidi kunye ne-alkali, ukuxhathisa komphunga wamanzi, ukuzinza kombala, ukusebenza kombane, ukuzaliswa kweoli kunye nobushushu begumbi. Iimveliso zerabha ze-ethylene propylene zingasetyenziswa ixesha elide kwi-120 ℃, kwaye zingasetyenziswa ngokufutshane okanye ngamaxesha athile kwi-150 – 200 ℃. Ubushushu bokusetyenziswa bunokunyuswa ngokongeza i-antioxidant efanelekileyo. I-EPDM idibene neperoxide ingasetyenziswa phantsi kweemeko ezinzima. Xa i-ozone concentration ye-EPDM yi-50 phm kwaye ixesha lokwelula liyi-30%, i-EPDM inokufikelela kwi-150 h ngaphandle kokuqhekeka.

3. Ukumelana nokubola
Ngenxa yokungabikho kwe-polarity kunye ne-unsaturation ephantsi ye-rubber ye-ethylene propylene, inokumelana kakuhle neekhemikhali ezahlukeneyo ze-polar ezifana notywala, i-asidi, i-alkali, i-oxidant, i-refrigerant, i-detergent, i-oyile yezilwanyana kunye nemifuno, i-ketone kunye negrisi; Nangona kunjalo, inozinzo olulambathayo kumafutha kunye nezinyibilikisi ezinevumba elimnandi (ezifana nepetroli, ibenzene, njl.) kunye neoyile yeminerali. Ukusebenza kuya kuncipha phantsi kwesenzo sexesha elide le-asidi egxininisiweyo. Kwi-ISO / TO 7620, idatha malunga neempembelelo eziphantse zibe yi-400 yeekhemikhali ze-corrosive gaseous kunye ne-liquid kwiipropathi zeerubha ezahlukeneyo ziqokelelwa, kwaye amabakala e-1-4 achazwe ukubonisa iziphumo zawo. Iimpembelelo zeekhemikhali ezonakalisayo kwiipropathi zeerabha zimi ngolu hlobo lulandelayo:

Impembelelo yeBanga lokuNdumba koMbane/% ukuNcitshiswa koBulukhuni kwiiPropati
1 <10 <10 Kancinci okanye akukho
2 10-20<20 encinci
3 30-60<30 Phakathi
4>60>30 serious

4. Ukumelana nomphunga wamanzi
I-EPDM inokumelana ne-steam egqwesileyo kwaye iqikelelwa ukuba iphezulu kunokumelana nobushushu. Kwi-230 ℃ umphunga oshushu kakhulu, inkangeleko ayitshintshi emva kweeyure eziphantse zibe yi-100. Nangona kunjalo, phantsi kweemeko ezifanayo, ukubonakala kwerabha ye-fluorine, irabha ye-silicon, irabha ye-fluorosilicone, irabha ye-butyl, irabha ye-nitrile kunye nerabha yendalo iye yawohloka kakhulu ngexesha elifutshane.

5. Ukumelana namanzi ashushu
Irabha ye-ethylene propylene nayo inokuxhathisa okulungileyo kumanzi ashushu kakhulu, kodwa inxulumene ngokusondeleyo kuzo zonke iinkqubo ze-vulcanization. Iimpawu zomatshini werabha ye-ethylene propylene (EPR) evulcaniswe nge-dimorphine disulfide kunye ne-TMTD yatshintshwa kancinane emva kokuntywiliselwa kwi-125 ℃ yamanzi ashushu kakhulu kangangeenyanga ezili-15, kwaye izinga lokwandiswa komthamo laliyi-0.3 kuphela%.

6. Ukusebenza kombane
Irabha ye-ethylene propylene ine-insulation egqwesileyo yombane kunye nokuxhathisa kwe-corona, kwaye iimpawu zayo zombane ziphezulu okanye zisondele kunezo zerabha ye-styrene butadiene, i-chlorosulfonated polyethylene, i-polyethylene kunye ne-cross-linked polyethylene.

7. Ukolula
Ngenxa yokuba i-ethylene propylene rubber ayinayo i-polar substituents kwisakhiwo sayo se-molecular kunye ne-low molecular cohesion energy, i-chain chain chain ingakwazi ukugcina ukuguquguquka kuluhlu olubanzi, okwesibini kuphela kwi-rubber yemvelo kunye ne-cis polybutadiene irabha, kwaye isenokugcina kwiqondo lokushisa eliphantsi.

8. Ukuncamathela
Ngenxa yokungabikho kwamaqela asebenzayo kwisakhiwo se-molecular ye-ethylene propylene irabha, amandla okubambisana aphantsi, kwaye irabha kulula ukuyitshiza, ngoko ke ukuzincamathela kunye nokunamathelana kumbi kakhulu.