Uyini Umehluko Phakathi Kwerabha Yesilikhoni Ne-EPDM?

Uma ukhetha irabha ozoyisebenzisa, onjiniyela abaningi bagcina bedinga ukukhetha phakathi kokukhetha i-silicone noma i-EPDM. Ngokusobala sinokukhetha i-silicone(!) kodwa lokhu okubili kufanelana kanjani? Iyini i-EPDM futhi uma uzithola udinga ukukhetha phakathi kokubili, unquma kanjani? Nasi umhlahlandlela wethu we-EPDM osheshayo…

 

Kuyini i-EPDM?

I-EPDM imele i-Ethylene Propylene Diene Monomers futhi iwuhlobo lwerabha yokwenziwa enobukhulu obuphezulu. Ayimelani nokushisa njenge-silicone kodwa iyakwazi ukumelana namazinga okushisa aphezulu afinyelela ku-130°C. Ngenxa yalokho isetshenziswa njengengxenye yezimboni ezahlukahlukene kufaka phakathi izimboni, ezokwakha kanye nezimoto. Ezimweni zokushisa eziphansi, i-EPDM izofinyelela ezingeni lokuqhekeka ku--40°C.

I-EPDM ithandwa kakhulu njengerabha yangaphandle njengoba imelana nokushisa okuhlanganisa ukumelana ne-asidi ne-alkali. Ngakho-ke, uzovame ukuyithola isetshenziselwa izinto ezifana nezimpawu zamafasitela neminyango noma amashidi okuvimbela amanzi.

I-EPDM futhi inomhuzuko omuhle, ukukhula okusikiwe kanye nokumelana nokudabuka.

 

Yini enye engayinikeza i-silicone?
Nakuba i-silicone ne-EPDM zinezici eziningana ezifana nokumelana okuhle kakhulu nemvelo, kukhona nomehluko obalulekile futhi kubalulekile ukuqaphela lokhu lapho wenza izinqumo zakho zokuthenga.

I-Silicone iyinhlanganisela yekhabhoni, i-hydrogen, i-oxygen kanye ne-silicone futhi le ngxube inikeza izinzuzo eziningi ezingatholakali yi-EPDM. I-Silicone imelana kakhulu nokushisa, ikwazi ukumelana namazinga okushisa afinyelela ku-230°C ngenkathi igcina izakhiwo zayo zomzimba. Ngaphezu kwalokho, futhi iyi-elastomer ehlanzekile futhi ngenxa yalokho ithandwa embonini yokudla neziphuzo. Emazingeni okushisa aphansi, i-silicone idlula i-EPDM futhi ngeke ifinyelele ezingeni lokuqhekeka kuze kube yi--60°C.

I-silicone nayo iyanwebeka futhi inikeza ubude obukhulu kune-EPDM. Ingakhiwa futhi ukuze imelane nokudabuka njenge-EPDM. Zombili lezi zici zenza kube kuhle ukusetshenziswa njenge-vacuum membranes emishinini esetshenziselwa ukukhiqiza amaphaneli elanga kanye nefenisha enama-laminated, evame ukubizwa ngokuthi imishini yokwenza i-vacuum.

I-Silicone iyi-elastomer eqinile futhi ngenxa yalokho abathengi banomuzwa wokuthi i-silicone ingcono njengesixazululo sesikhathi eside esiphephile ngenxa yalokhu. Nakuba i-silicone ibhekwa njengebiza kakhulu phakathi kwalokhu okubili, isikhathi sokuphila se-EPDM sivame ukuba sifushane kunese-silicone ngakho-ke kufanele sishintshwe lapho sisetshenziswa kaningi. Lokhu kuphumela ezindlekweni zesikhathi eside ezidlula eze-silicone.

Okokugcina, nakuba i-EPDM kanye ne-silicone kuzovuvukala uma kufakwa ku-oyela isikhathi eside emazingeni okushisa aphezulu, i-silicone inokumelana namafutha okudla emazingeni okushisa asekamelweni yingakho isetshenziswa ekucubungulweni kwamafutha okudla njengezivalo nama-gasket emishini yokucubungula.

 

Ungakhetha kanjani phakathi kwalokhu okubili?
Nakuba lo mhlahlandlela omfushane umane ufingqa eminye yemibono phakathi kwalokhu okubili, indlela engcono kakhulu yokunquma ukuthi iyiphi irabha oyidingayo ukuqonda inhloso yokusetshenziswa kanye nokusetshenziswa kwayo ngqo. Ukuthola ukuthi uzofuna ukuyisebenzisa kanjani, ukuthi izoba ngaphansi kwaziphi izimo nokuthi uzoyidinga kanjani ukuthi isebenze kuzokuvumela ukuthi ube nombono ocacile kakhulu ngokuthi iyiphi irabha ongayikhetha.

Futhi, qiniseka ukuthi ucabangela izici ezinjengokuqina, ukuguquguquka kanye nesisindo okuzodinga ukwenziwa ukuze kumelwane naso njengoba lokhu kungaba 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 nomunye wethimba lethu, khona-ke kukhona umuntu otholakalayo. Xhumana nathi nje.