Ilaphu le-PTFE elinobushushu obuphezulu libonelela ngokuxhathisa okukhethekileyo kweekhemikhali, ukumelana neeasidi ezomeleleyo, iialkali, izinyibilikisi eziphilayo, kunye neegesi ezidliwayo. Eli nqaku lichaza izinto zalo ezixhathisayo, imida (isinyithi esinyibilikisiweyo se-alkali, i-agent eqinile ye-fluorinating), kunye nezinto eziphambili ezifana nobushushu, ugxininiso, kunye noxinzelelo lomatshini.

Ukufakwa kwe-PTFE akuphelelanga kwilaphu le-fiberglass. Eli nqaku lizisa ii-substrates ezi-7 ezizezinye - i-aramid, i-carbon fiber, i-PBI, isinyithi esine-porous, i-graphite, i-asbestos (ikhutshwe ngaphandle), kunye ne-ceramic fillers - kunye neempawu zabo zenkqubo, izibonelelo, ukulinganiselwa, kunye nezicelo eziphambili.

Eli nqaku licacisa ukuba kutheni ilaphu le-alkali-free fiberglass lelona laphu likhethwayo le-PTFE elinobushushu obuphezulu. Igquma ukudityaniswa kweekhemikhali kusetyenziswa i-silane coupling agents kunye neepropathi eziphambili zomzimba ezifana nokuzinza kwe-thermal, ukuzinza komda, kunye nokumelana nomhlwa-ukuqinisekisa ukusebenza okuhlala ixesha elide kwiindawo ezirhabaxa.