High-tensile PTFE high-temperature cloth is made by coating PTFE onto high-strength fiberglass fabric, offering tensile strength, heat resistance, non-stick properties, chemical resistance, and low friction. Key applications include: industrial conveying (heat shrink packaging, food baking, textile dryers, paper/film drying); composite molding release cloth and hot press cushion liners; welding protective curtains and thermal insulation jackets; electrical motor and transformer insulation; building sliding bearings and pipeline supports; chemical filtration and valve sealing in corrosive environments. High tensile strength ensures durability under tension, tearing, repeated flexing, and high-temperature mechanical stress across these diverse heavy-duty applications.

During sintering, PTFE particles on fiberglass fabric melt above 327°C, destroying original folded-chain lamellae and particle boundaries to form an amorphous melt. Upon cooling, PTFE recrystallizes into spherulites composed of radially oriented lamellae, with crystallinity ranging 50–70%. Cooling rate determines crystal perfection: slow cooling yields higher crystallinity, larger spherulites, greater hardness; rapid quenching gives finer spherulites and improved flexibility.