Uyini umehluko phakathi kwe-EPDM ne-NBR/PVC materials?

Ukuqonda umehluko phakathi kwe-EPDM (i-ethylene propylene diene monomer) ne-NBR/PVC (irabha ye-nitrile butadiene/polyvinyl chloride) kubalulekile lapho kukhethwa izinto ezisetshenziswayo ezihlukahlukene, ikakhulukazi ezimbonini ezifana nezezimoto, ezokwakha, nezokukhiqiza. Zombili izinto ezisetshenziswayo zinikeza izici ezihlukile ezizenza zilungele ukusetshenziswa okuthile, futhi ukuqonda lo mehluko kungakusiza wenze izinqumo ezinolwazi.

Ukwakheka kanye nezakhiwo

I-Ethylene propylene diene monomer (EPDM) iyirabha yokwenziwa eyaziwa ngokukwazi ukumelana nokushisa, i-ozone, nesimo sezulu. Ukwakheka kwayo kwe-ethylene, i-propylene, ne-diene kuyinikeza izakhiwo eziyingqayizivele. Ukunwebeka okuhle kakhulu kwe-EPDM nekhono lokumelana nezinga lokushisa elidlulele kuyenza ibe inketho ekahle ezinhlelweni zokusebenza zangaphandle. Iphinde imelane ne-UV futhi imelane nokuguga, okuyenza ibe yinketho ethandwayo yokufulela ulwelwesi, ama-seal, nama-gaskets.

Ngakolunye uhlangothi, i-NBR (irabha ye-nitrile butadiene) iyirabha yokwenziwa eyakhiwe ngokuyinhloko i-acrylonitrile ne-butadiene. Le nhlanganisela inika i-NBR ukumelana nowoyela nophethiloli okuhle kakhulu, okuyenza ibe into ekhethwayo yamapayipi kaphethiloli, ama-seal, nama-gaskets embonini yezimoto. Nakuba ingeyona irabha, i-PVC (i-polyvinyl chloride) iyi-thermoplastic esetshenziswa kakhulu enokumelana okuhle kwamakhemikhali nokuqina. Ivamise ukusetshenziswa kumapayipi, ukuvala amakhebula, nasezinhlelweni ezahlukene zokwakha.

Ukumelana nezinga lokushisa

Omunye umehluko obaluleke kakhulu phakathi kwe-EPDM ne-NBR/PVC ukumelana kwazo nezinga lokushisa. I-EPDM ngokuvamile ingamelana namazinga okushisa asukela ku -40°F kuya ku-250°F (-40°C kuya ku-121°C), okuyenza ifaneleke inhlobonhlobo yezindawo. Ngokuphambene, i-NBR inebanga lokushisa eliphansi, ngokuvamile lenza kahle phakathi kuka -40°F no-212°F (-40°C kuya ku-100°C). Nakuba i-PVC isetshenziswa kabanzi, inebanga lokushisa elilinganiselwe futhi ijwayele ukuba brittle emazingeni okushisa aphansi.

Ukumelana namakhemikhali

Mayelana nokumelana namakhemikhali, i-NBR igqama kakhulu ngokumelana kwayo nowoyela, amafutha, neminye imikhiqizo esekwe kuphethiloli. Lokhu kuyenza ibe inketho efanelekile yezinhlelo zokusebenza ezimbonini zezimoto kanye ne-aerospace. Nakuba i-EPDM imelana nezinhlobonhlobo zamakhemikhali, ayisebenzi kahle ngokwemibandela yokumelana namafutha namafutha. I-PVC, ngakolunye uhlangothi, imelana nezinhlobonhlobo zamakhemikhali kodwa ingase ithintwe izincibilikisi ezithile namafutha.

I-EPDM ne-NBR/PVC zinezinhlelo zokusebenza ezihluke kakhulu ngenxa yezakhiwo zazo ezihlukile. I-EPDM ijwayele ukusetshenziswa ezinhlelweni zokufulela, i-automotive weatherstripping, kanye nokufakwa kukagesi. Ukuqina kwayo kanye nokumelana nezimo zemvelo kuyenza ibe ukukhetha okuhle kwezicelo zangaphandle. I-NBR isetshenziswa kakhulu embonini yezimoto ekusetshenzisweni kukaphethiloli kanye nokumelana nowoyela njengama-gaskets, seal, namapayipi. I-PVC, ngenxa yamandla ayo nokuguquguquka kwayo, isetshenziswa kabanzi ekwakheni amapayipi, izinto ezifakwayo, kanye nokufakwa kukagesi.

Izindleko Ukucatshangelwa

Izindleko zingenye into okufanele icatshangelwe lapho ukhetha phakathi kwe-EPDM ne-NBR/PVC. Ngokuvamile, i-EPDM ijwayele ukubiza kakhulu kune-NBR ngenxa yezakhiwo zayo eziphakeme nokusebenza ezindaweni ezinokhahlo. I-PVC ngokuvamile iyindlela engabizi kakhulu, okwenza kube ukukhetha okudumile kumaphrojekthi acabangela ibhajethi.

Ekugcineni, ukukhetha phakathi kwe-EPDM ne-NBR/PVC kuncike kakhulu ezidingweni ezithile zohlelo lokusebenza. I-EPDM ilungele izinhlelo zokusebenza zangaphandle ezidinga ukumelana nesimo sezulu esihle, kuyilapho i-NBR iyinto ekhethwayo yokumelana nowoyela nophethiloli ezinhlelweni zezimoto. I-PVC inikeza ukuguquguquka nokusebenza kahle kwezindleko, ihlangabezana nezinhlobonhlobo zezidingo zokwakha. Ukuqonda lo mehluko kungasiza onjiniyela, abakhiqizi, nabathengi benze izinqumo ezinolwazi ezihambisana nezidingo zabo zephrojekthi.