Kodi pali kusiyana kotani pakati pa silicone rubber ndi EPDM?

Posankha rabala yogwiritsira ntchito, Mainjiniya ambiri amafunika kusankha pakati pa silicone kapena EPDM. Mwachionekere timakonda silicone (!) koma kodi ziwirizi zimagwirizana bwanji? Kodi EPDM ndi chiyani ndipo ngati mukufunika kusankha pakati pa ziwirizi, mumasankha bwanji? Nayi kalozera wathu wachangu wa EPDM…

 

Kodi EPDM ndi chiyani?

EPDM imayimira Ethylene Propylene Diene Monomers ndipo ndi mtundu wa rabara yopangidwa ndi anthu ambiri. Siimalimbana ndi kutentha ngati silicone koma imatha kupirira kutentha kwambiri mpaka 130°C. Chifukwa cha zimenezi imagwiritsidwa ntchito ngati gawo la mafakitale osiyanasiyana kuphatikizapo mafakitale, zomangamanga ndi magalimoto. Mu kutentha kochepa, EPDM imafika pofooka pa -40°C.

EPDM imadziwikanso ngati rabala yakunja chifukwa imalimbana ndi nyengo kuphatikizapo kukana asidi ndi alkali. Chifukwa chake, nthawi zambiri mupeza kuti imagwiritsidwa ntchito pazinthu monga zomangira pazenera ndi zitseko kapena mapepala oteteza madzi.

EPDM ilinso ndi kukwapula bwino, kukula kodula komanso kukana kung'ambika.

 

Kodi silicone ingapereke chiyani china?
Ngakhale kuti silicone ndi EPDM zili ndi zinthu zambiri monga kukana kuwononga chilengedwe, palinso kusiyana kwakukulu ndipo ndikofunikira kuzindikira izi popanga zisankho zanu zogula.

Silicone ndi chisakanizo cha kaboni, haidrojeni, mpweya ndi silikoni ndipo chisakanizochi chimapereka zabwino zambiri zomwe EPDM sichipereka. Silicone imapirira kutentha kwambiri, imatha kupirira kutentha mpaka 230°C pamene ikusunga mawonekedwe ake enieni. Kuphatikiza apo, ndi elastomer yoyera ndipo motero ndi yotchuka m'makampani ogulitsa zakudya ndi zakumwa. Mu kutentha kochepa, silikoni imaposa EPDM ndipo siidzafika pofooka mpaka -60°C.

Silicone imatambasulanso ndipo imapereka kutalika kwambiri kuposa EPDM. Ikhozanso kupangidwa kuti ikhale yolimba ngati EPDM. Zonsezi zimapangitsa kuti ikhale yoyenera kugwiritsidwa ntchito ngati ma vacuum membranes m'makina omwe amagwiritsidwa ntchito popanga ma solar panels ndi mipando yokhala ndi laminated, omwe nthawi zambiri amatchedwa makina opangira vacuum.

Silicone ndi elastomer yokhazikika ndipo chifukwa chake ogula amaona kuti silicone ndi yabwino ngati yankho lotetezeka kwa nthawi yayitali chifukwa cha izi. Ngakhale kuti silicone imawonedwa ngati yokwera mtengo kwambiri mwa ziwirizi, nthawi zambiri moyo wa EPDM umakhala wofupika kuposa wa silicone motero umayenera kusinthidwa mukamagwiritsa ntchito pafupipafupi. Izi zimapangitsa kuti mtengo wake ukhale wokwera kuposa wa silicone.

Pomaliza, ngakhale kuti EPDM ndi silicone zonse zimatupa ngati zitayikidwa mu mafuta kwa nthawi yayitali kutentha kwambiri, silicone imakana mafuta a chakudya kutentha kwa chipinda, ndichifukwa chake imagwiritsidwa ntchito pokonza mafuta a chakudya ngati zomangira ndi ma gaskets pamakina opangira.

 

Kodi mungasankhe bwanji pakati pa ziwirizi?
Ngakhale kuti bukuli lalifupi likufotokoza mwachidule kusiyana pakati pa awiriwa, njira yabwino yodziwira mphira yomwe mukufuna ndikumvetsetsa cholinga chogwiritsira ntchito ndi momwe mungagwiritsire ntchito molondola. Kudziwa momwe mungafunire kuigwiritsa ntchito, momwe idzakhalire pansi pa mphamvu zake komanso momwe mukufunira kuti igwire ntchito kudzakuthandizani kukhala ndi lingaliro lomveka bwino la mphira yomwe mungasankhe.

Komanso, onetsetsani kuti mwaganizira zinthu monga mphamvu, kusinthasintha, ndi kulemera komwe zinthuzo zidzafunika kupirira chifukwa izi zitha kukhalanso zinthu zofunika kwambiri. Mukakhala ndi chidziwitsochi, buku lathu lathunthu la Silicone Rubber vs EPDM lingakupatsireni zambiri zomwe mukufuna kuti mupange chisankho chanu chomaliza.

Ngati mukufuna kukambirana za zofunikira pa ntchito yanu ndi gulu lathu, ndiye kuti pali wina woti akuthandizeni nthawi zonse. Ingolumikizanani nafe.