Uyini umehluko phakathi kwezinto ze-EPDM kanye ne-NBR/PVC?

Ukuqonda umehluko phakathi kwe-EPDM (i-ethylene propylene diene monomer) kanye ne-NBR/PVC (i-nitrile butadiene rubber/polyvinyl chloride) kubalulekile lapho ukhetha izinto zokusetshenziswa okuhlukahlukene, ikakhulukazi ezimbonini ezifana nezimoto, ezokwakha, kanye nezokukhiqiza. Zombili izinto zinikeza izakhiwo ezihlukile ezenza zifanele ukusetshenziswa okuthile, futhi ukuqonda lo mehluko kungakusiza ukuthi wenze izinqumo ezinolwazi.

Ukwakheka kanye nezakhiwo

I-Ethylene propylene diene monomer (EPDM) iyirabha yokwenziwa eyaziwa ngokumelana kwayo okuhle kakhulu nokushisa, i-ozone, kanye nesimo sezulu. Ukwakheka kwayo kwe-ethylene, i-propylene, kanye ne-diene kuyinika izakhiwo ezihlukile. Ukuqina kwayo okuhle kakhulu kanye nekhono lokubekezelela amazinga okushisa aphezulu kwenza kube ukukhetha okuhle kakhulu kokusetshenziswa kwangaphandle. Futhi imelana ne-UV nokuguga, okwenza kube ukukhetha okuthandwayo kolwelwesi lokufulela, izivalo, kanye nama-gasket.

Ngakolunye uhlangothi, i-NBR (irabha ye-nitrile butadiene) iyirabha yokwenziwa eyakhiwe ngokuyinhloko nge-acrylonitrile ne-butadiene. Le nhlanganisela inikeza i-NBR ukumelana okuhle kakhulu kwamafutha kanye nophethiloli, okwenza kube yinto ekhethwayo yamapayipi kaphethiloli, izivalo, kanye nama-gasket embonini yezimoto. Nakuba ingeyona irabha, i-PVC (i-polyvinyl chloride) iyi-thermoplastic esetshenziswa kabanzi enokumelana okuhle kwamakhemikhali kanye nokuqina. Ivame ukusetshenziswa kumapayipi, ekufakweni kwekhebula, kanye nezinhlelo zokusebenza ezahlukahlukene zokwakha.

Ukumelana nokushisa

Omunye wemehluko obaluleke kakhulu phakathi kwe-EPDM ne-NBR/PVC ukumelana kwazo nokushisa. I-EPDM ivame ukumelana namazinga okushisa asukela ku--40°F kuya ku-250°F (-40°C kuya ku-121°C), okwenza ifaneleke ezindaweni eziningi ezahlukene. Ngokuphambene nalokho, i-NBR inezinga lokushisa eliphansi, ngokuvamile isebenza kahle phakathi kuka--40°F no-212°F (-40°C kuya ku-100°C). Nakuba i-PVC isetshenziswa kabanzi, inezinga lokushisa elilinganiselwe futhi ivame ukuba buthaka emazingeni okushisa aphansi.

Ukumelana namakhemikhali

Ngokuphathelene nokumelana namakhemikhali, i-NBR ivelele ngokumelana kwayo namafutha, amafutha, neminye imikhiqizo esuselwe kuphethiloli. Lokhu kwenza kube ukukhetha okuhle kakhulu kokusetshenziswa embonini yezimoto nezindiza. Nakuba i-EPDM imelana namakhemikhali ahlukahlukene, ayisebenzi kahle ngokuphathelene nokumelana namafutha kanye namafutha. Ngakolunye uhlangothi, i-PVC imelana namakhemikhali ahlukahlukene kodwa ingathinteka yizinyibilikisi ezithile namafutha.

I-EPDM kanye ne-NBR/PVC zinezinhlelo zokusebenza ezihluke kakhulu ngenxa yezakhiwo zazo ezihlukile. I-EPDM ivame ukusetshenziswa ezinhlelweni zokufulela, ukususwa kwesimo sezulu sezimoto, kanye nokufakwa kogesi. Ukuqina kwayo kanye nokumelana nezimo zemvelo kwenza kube ukukhetha okuhle kakhulu kwezinhlelo zokusebenza zangaphandle. I-NBR isetshenziswa kakhulu embonini yezimoto ekusetshenzisweni okumelana nophethiloli kanye namafutha njenge-gaskets, seals, kanye namapayipi. I-PVC, ngenxa yamandla ayo kanye nokuguquguquka kwayo, isetshenziswa kabanzi ekwakheni amapayipi, izinto zokufaka, kanye nokufakwa kogesi.

Izindleko Zokucatshangelwa

Izindleko zingenye into okufanele uyicabangele lapho ukhetha phakathi kwe-EPDM ne-NBR/PVC. Ngokuvamile, i-EPDM ivame ukubiza kakhulu kune-NBR ngenxa yezakhiwo zayo ezinhle kanye nokusebenza kwayo ezindaweni ezinzima. I-PVC ivame ukuba yindlela engabizi kakhulu, okwenza kube ukukhetha okuthandwayo kumaphrojekthi anakekela isabelomali.

Ekugcineni, ukukhetha phakathi kwezinto ze-EPDM kanye ne-NBR/PVC kuncike kakhulu ezidingweni ezithile zohlelo lokusebenza. I-EPDM ilungele izinhlelo zokusebenza zangaphandle ezidinga ukumelana nesimo sezulu esihle kakhulu, kuyilapho i-NBR iyinto ekhethwayo yokumelana namafutha kanye nophethiloli ezisetshenziswa ezimotweni. I-PVC inikeza ukuguquguquka kanye nokusebenza kahle kwezindleko, ihlangabezana nezidingo eziningi zokwakha. Ukuqonda lo mehluko kungasiza onjiniyela, abakhiqizi, kanye nabathengi ukuthi benze izinqumo ezinolwazi ezihambisana nezidingo zabo zephrojekthi.