PFA ndi TFM PTFE Kusankha Kwabwino Kwambiri kwa Bellows ndi Diaphragms

PTFE (polytetrafluoroethylene), yemwe amadziwika kuti polima, ndiye polima woyamba kusankha mavuvu ndi ma diaphragms, koma kodi mumadziwa kuti PTFE si polima yokhayo yomwe mungasankhe?M'nkhaniyi tifanizira ma polima ena awiri - PFA ndi TFM - ku PTFE ngati kusankha kwa mavuvu ndi ma diaphragms.

PFA

PFA, kapena Perfluoroalkoxy, nthawi zina amatchedwa polima PFA.Ili ndi katundu yemwe ali wofanana ndi PTFE, kuphatikiza kwambiri mankhwala resistivity ndipo ali otsika kwambiri permeability mpweya.Si hydrophobic ngati PTFE, komabe, ndipo imatenga madzi ochulukirapo.Chifukwa chimodzi chomwe chingasankhidwe pa PTFE ndi kuthekera kwake kukhalabe ndi mphamvu zamakina pamatenthedwe apamwamba, ngakhale ataphatikizidwa ndi mankhwala a caustic.Imakhalanso ndi zokwawa zabwino kwambiri, kutopa komanso kukhazikika kwamafuta.Utumiki wake wopitilira muyeso kutentha ndi 260 ° C.

PFA imakhalanso yosinthasintha pankhani ya momwe magawo angapangidwe;mwachitsanzo, imabwereketsa bwino ku extrusion, kuumba jekeseni, kusamutsa akamaumba, kuwomba akamaumba, ndi psinjika akamaumba.Nthawi zambiri mumawona PFA ikugwiritsidwa ntchito pazida zapulasitiki za labu chifukwa cha kusakhazikika kwamankhwala, ndipo kusinthasintha kwake kudapangitsa kuti ikhale chisankho chodziwika bwino pamachubu muzinthu zambiri zama mankhwala.Ndiwodziwikanso pakugwiritsa ntchito semiconductor ndi mankhwala.

TFM

Mwina mudamvapo za TFM, kapena PTFE-TFM.TFM ndi m'badwo wachiwiri wa PTFE womwe umaphatikizapo chosinthira china chotchedwa Perfluoro(propyl vinyl ether).Chosinthirachi chimapangitsa mawonekedwe ake a polima kukhala olimba kuposa PTFE, kutsitsa mpweya wake pansi pa PTFE koma osatsika kwambiri ngati PFA.Makulidwe a khoma lomwelo la TFM lili ndi zotchinga kawiri ngati PTFE.Mayamwidwe ake amadzi akufanana ndi a PTFE, omwe ndi abwino kwambiri.Monga PFA, imachita bwino pakutentha kwambiri ndipo imakhala yopanda mankhwala.TFM imasinthidwanso bwino ndi mapulogalamu omwe amaphatikiza kutentha kwambiri ndi vacuums.Monga PFA, imagwira ntchito bwino pazamankhwala ndi semiconductor.

Poyerekeza ndi PTFE, ili ndi mawonekedwe apamwamba kwambiri, ndi owuma, ndipo sivuta kukwawa ndipo yawonjezera kutopa.Poyerekeza ndi PTFE, imawonetsanso kuchira bwino kwa nkhawa.Kutentha kwake kosalekeza kosalekeza ndi 250 ° C, komwe kuli pansi pang'ono PFA.

Zosankha za polima

Zosankha zonsezi za polima ndi zosankha zabwino kwambiri pakugwiritsa ntchito chiyero chapamwamba, kuphatikiza zamankhwala, mankhwala, ma semiconductor bellows.Chifukwa chake, nthawi ina mukadzasankha mavuvu a polima kapena diaphragm, musaiwale kuti PTFE si njira yanu yokhayo.