Drying is a critical step in PTFE high-temperature fabric production. Common defects include: cracking (too fast drying, surface skinning), coating migration (particles move to surface, weak internal bond), pinholes/blisters (trapped air or steam), white spots and chalking (surfactant migration or incomplete fusion), yellowing/coking (overheating of additives), delamination (shrinkage stress exceeds adhesion), orange peel (poor leveling), warpage (uneven shrinkage), surface dry but interior wet (skinning traps moisture), and thick edges (coffee-ring effect). Solutions involve controlled drying profiles, proper ventilation, and substrate pretreatment.

PTFE high-temperature fabric is widely used in the chemical industry for seven key applications: flange gaskets and pipe linings (resists strong acids/alkalis), reactor and tank linings (prevents metal corrosion, easy cleaning), filter bags for corrosive flue gas (up to 260°C), anti-corrosion expansion joints for ducts, anti-adhesion welding pads, release cloth for composite molding, and electrical/thermal insulation wraps. FDA and UL grades available.

Surface finishing agents applied to fiberglass fabric before PTFE coating are critical for final PTFE high-temperature cloth performance. Organosilane coupling agents create molecular bridges between inorganic glass fiber and organic PTFE, boosting peel strength from <2 N/cm to 4-8+ N/cm. Proper treatment also enhances heat resistance (260°C+), dielectric performance, and chemical resistance. Untreated fabric leads to delamination, bubbling, and short service life.