Calendering – ntama a wɔde PTFE akata so a wɔde mia ahwehwɛ rollers a ɛyɛ hyew ntam wɔ 360-380°C – sesa ɔfasu no nsɛso kɛse, nea ɛma wogyae, sɛnea ɛmma nsu ntumi nkɔ mu, ne mfiridwuma mu adwumayɛ. Ɛtew roughness so fi Ra 0.5-1.0 μm kosi <0.05 μm, ɛto pinholes, ɛma sɛnea ɛko tia ɔsɛe no tu mpɔn, nanso ɛtew tetew ahoɔden ne sɛnea ɛyɛ mmerɛw so. Ɛho hia ma release liners ne anyinam ahoɔden insulation.

PTFE ntama a ɛyɛ hyew kɛse (PTFE membrane material) yɛ ade a ɛkorɔn a wɔpaw ma tensile architecture. Mfasoɔ titire: mfeɛ 30+ abɔnten asetena, ne ho tew asase (osuo nsuo hohoro efĩ), hann a ɛyɛ mmerɛw a ɛkɔ (6-13%), Class A ogya rating, ne dadeɛ-te sɛ ahoɔden a ɛba fam 1.5 kg/m2. Wɔde di dwuma wɔ agumadibea ahorow, wimhyɛn gyinabea ahorow, ne adan a ɛyɛ nwonwa mu wɔ wiase nyinaa.

Ɛnyɛ ntama a wɔde fiberglass ayɛ nkutoo na wɔde PTFE nsu gu mu. Saa asɛm yi de substrates foforɔ 7 ba – aramid, carbon fiber, PBI, porous metal, graphite, asbestos (wɔayi afiri hɔ nkakrankakra), ne ceramic fillers – a wɔn dwumadie no su, mfasoɔ, anohyetoɔ, ne dwumadie titire.