Irabha ye-EPDM iyeyohlelo lwe-thermoset elastomers (irubha), ngelixa i-PTFE iyeye-thermoplastics.Nceda uqaphele ukuba ezi mathiriyeli zimbini zineengxinano ezingafaniyo kakhulu.
Irabha ye-EPDM yi-thermoset elastomer okanye imathiriyeli yerabha.Inoxinano oluphantsi ngokufanelekileyo kunye nomthamo ophezulu wokushisa xa kuthelekiswa nezinye izixhobo zerabha.
I-PTFE yi-fluoroplastic (i-fluorine-based thermoplastic).Inokuba noxinzelelo oluphezulu phakathi kwe-thermoplastics.Ukongeza, inokuba ne-ductility ephezulu ephakathi kunye namandla asezantsi okuqina.
I-EPDM ithambile kwaye yenza imathiriyeli yokutywina engcono (ihambelana bhetele nemigangatho erhabaxa yomphezulu).Ipolymer iqinile kwaye iyatyibilika, enokuthi ibambe ngcono kwisicelo esiguqukayo okanye esirhabaxa.Bobabini banokukhathalela kancinci malunga namanzi olwandle ukusuka kuhlaselo lweekhemikhali / kwimbono ye-corrosion.
Ubushushu bokubola kwe-PTFE yi>490°C (>910°F) kwaye ezona mveliso ziphambili zokubola yirhasi ye-hydrogen flouride (yonakalisa kakhulu) kunye nekharbon diokside.Ayifanelekanga ukusetyenziswa apho iya kudibana ne-acetone okanye izicelo ezishushu ze-alkaline.
Ukuba ufuna iindawo zokutywina sebenzisa i-EPDM okanye irabha yeNdalo, imathiriyeli ye-PTFE ayisayi kutywinwa kakuhle kwaphela.Inzima, kodwa yomelele ngakumbi kwaye ngokuqinisekileyo ibiza kakhulu kodwa ayinakutywinwa kunye ne-elastomer.
PS: Qhagamshelana nathi PTFE iimveliso ezigqityiweyo isampuli free
Ixesha lokuposa: Jul-01-2017