Uyini Umehluko Phakathi Kwerabha Ye-Silicone Ne-EPDM?

Lapho ukhetha irabha ezosetshenziswa, Onjiniyela abaningi bagcina bedinga ukukhetha phakathi kokukhetha i-silicone noma i-EPDM. Ngokusobala sinokuthanda i-silicone(!) kodwa kufana kanjani okubili ngokumelene nomunye? Iyini i-EPDM futhi uma uzithola udinga ukukhetha phakathi kwakho kokubili, unquma kanjani? Nansi inkomba yethu esheshayo ye-EPDM…

 

Iyini i-EPDM?

I-EPDM imele i-Ethylene Propylene Diene Monomers futhi iwuhlobo lwerabha yokwenziwa enokuminyana okuphezulu. Ayimelani nokushisa njenge-silicone kodwa iyakwazi ukumelana namazinga okushisa afika ku-130°C. Ngenxa yalokho isetshenziswa njengengxenye phakathi kwezimboni ezihlukahlukene ezihlanganisa izimboni, ezokwakha kanye nezezimoto. Emazingeni okushisa aphansi, i-EPDM izofinyelela iphuzu elibi ku--40°C.

I-EPDM iphinde idume njengerabha yangaphandle njengoba imelana nesimo sezulu okuhlanganisa ukumelana ne-asidi ne-alkali. Kanjalo, uzoyithola isetshenziselwa izinto ezifana nezigxivizo zewindi nezicabha noma amashidi okuvikela amanzi.

I-EPDM iphinde ibe nokuhuzuka okuhle, ukukhula okusikiwe kanye nokumelana nezinyembezi.

 

Yini enye enganikezwa yi-silicone?
Nakuba i-silicone ne-EPDM zabelana ngezici ezimbalwa ezifana nokumelana okuhle kakhulu kwemvelo, kukhona futhi umehluko omkhulu obalulekile futhi kubalulekile ukukuqaphela lokhu lapho wenza izinqumo zakho zokuthenga.

I-Silicone iyingxube ye-carbon, i-hydrogen, umoya-mpilo ne-silicone futhi le ngxube inikeza inani lezinzuzo i-EPDM engazitholi. I-Silicone ikwazi ukumelana nokushisa kakhulu, ikwazi ukumelana namazinga okushisa afinyelela ku-230°C kuyilapho igcina izici zayo ezibonakalayo. Ngaphezu kwalokho, iyi-elastomer eyinyumba futhi idumile phakathi kwezimboni zokudla neziphuzo. Emazingeni okushisa aphansi i-silicone nayo idlula i-EPDM futhi ngeke ifinyelele endaweni ephukayo kuze kube -60°C.

I-Silicone nayo ilula futhi ihlinzeka ngobude obuningi kune-EPDM. Ingase futhi yenziwe ukuthi imelane nezinyembezi njenge-EPDM. Zombili lezi zici ziyenza ilungele ukusetshenziswa njengama-vacuum membranes emishinini esetshenziselwa ukukhiqiza amaphaneli elanga nefenisha elaminethiwe, evame ukubizwa ngemishini yokwenza i-vacuum.

I-Silicone iyi-elastomer ezinzile futhi ngenxa yalokho abathengi banomuzwa wokuthi i-silicone ingcono njengesixazululo sesikhathi eside esivikelekile ngenxa yalokhu. Nakuba i-silicone ibonakala njengebiza kakhulu kokubili, isikhathi sokuphila se-EPDM sivame ukuba sifushane kune-silicone ngakho-ke kufanele ishintshwe ekusetshenzisweni kaningi. Lokhu kubangela izindleko zesikhathi eside ezingaphezu kwe-silicone.

Okokugcina, nakuba kokubili i-EPDM ne-silicone izovuvukala uma ibekwe emafutheni isikhathi eside emazingeni okushisa aphezulu, i-silicone inokumelana namafutha okudla ekamelweni lokushisa yingakho isetshenziselwa ukucubungula amafutha okudla njengama-seal kanye nama-gaskets okucubungula imishini.

 

Ungakhetha kanjani phakathi kokubili?
Nakuba lo mhlahlandlela omfushane ufingqa omunye umehluko phakathi kwalokhu okubili indlela engcono kakhulu yokunquma ukuthi iyiphi irabha oyidingayo ukuqonda inhloso yokusetshenziswa kanye nokusebenza okuqondile. Ukuhlonza ukuthi uzofuna ukuyisebenzisa kanjani, yiziphi izimo ezobe ingaphansi kwazo nokuthi udinga ukuthi yenze kanjani kuzokuvumela ukuthi ube nombono ocace kakhulu wokuthi iyiphi irabha ongayikhetha.

Futhi, qiniseka ukuthi ucabangela izici ezinjengamandla, ukuguquguquka kanye nesisindo impahla ezodinga ukumelana nayo njengoba lezi zingase zibe yizici ezibalulekile zokunquma. Uma unalolu lwazi umhlahlandlela wethu ophelele we-Silicone Rubber vs EPDM ungakunikeza ulwazi olujulile oludingayo ukuze wenze isinqumo sakho sokugcina.

Uma ungathanda ukuxoxa ngezidingo zephrojekthi yakho nelinye lethimba lethu khona-ke othile uhlala etholakala. Vele usithinte.