Uyini umehluko we-PTFE, FEP kanye ne-PFA?

I-PTFE ne-PFA zinokubekezelela izinga lokushisa okuphakanyisiwe uma kuqhathaniswa ne-FEP.FEP kanye ne-PFA kucacile, nokho i-PTFE iyashintshashintsha.I-FEP ne-PFA zinezakhiwo ezingcono zomshini uma kuqhathaniswa ne-PTFE.Umehluko omkhulu umayelana nokungangeni kwamakhemikhali, ukumelana nokugqwala ,ukungena kwamanzi, kanye nokugunyazwa kwe-FDA.

Kunezinhlobo eziningi zama-fluoropolymers manje futhi ngayinye inenhloso ehlukile.Ukwehluka okuncane kwesakhiwo se-PTFE, i-FEP ne-PFA konke kunikeza umehluko onikeza izinto eziningi ezingezona izinti.

I-PTFE

I-Polytetrafluoroethylene, noma i-PTFE, yayingeyokuqala yama-fluoropolymers okwenziwa ukukhiqizwa.Ungase ulazi igama layo lomkhiqizo elaziwa kakhulu, i-polymer, ekhiqizwa inkampani yaseDuPont.

I-PTFE inhle kakhulu ekwenzeni okokunamathela okungagxili ezintweni ezisetshenziselwa ukupheka nokubhaka.Izinhlamvu zezinhlamvu nohlelo lokuqoqa uthuli luphinde lusebenzise i-PTFE.I-hydrophobic, uketshezi ngeke lube manzi i-PTFE njengoba ine-electronegativity ephezulu.PTFE ukuphela kwendawo eyaziwayo lapho isigcilikisha asikwazi ukunamathela.

FEP

I-ethylene propylene e-Fluorinated, noma i-FEP, ihluke kancane ku-PTFE, nakuba isenazo ezinye zezimfanelo zokunganamathelani ezifanayo ze-polymer.

I-FEP ithambile kune-PTFE futhi incibilika ngezinga lokushisa eliphansi ukuze ukusetshenziswa kokubhaka nokupheka akuvamile.I-FEP isobala kakhulu, ngakho noma yini eyihlanganisayo izohlala inombala ofanayo.I-FEP imelana nokukhanya kwelanga, ngakho ilungele zonke izimo zezulu

PFA

Umehluko omkhulu phakathi kwe-perfluoroalkoxy alkanes, PFA, kanye ne-PTFE izinto ezifakwe esikhundleni se-alkoxy ezivumela i-polymer ukuthi icutshungulwe.

Kwileveli yamangqamuzana, i-PFA inobude beketango elincane kwamanye ama-fluoropolymers.Iphinde ibe nokuthandelwa kweketango eliphakeme kunamanye ama-fluoropolymers.I-PFA ine-athomu yomoya-mpilo esakhiweni sayo.Abanye ababili abanalo lokhu.Lo mehluko esakhiweni unikeza i-PFA ukugeleza okuthuthukisiwe, ukumelana nokukhasa kanye nokuzinza kokushisa.

PS: Xhumana nathi nge-PTFE imikhiqizo eqediwe isampula yamahhala