Methods to Control the Crystallinity of PTFE Coating on Teflon High-Temperature Cloth
This article covers methods to control crystallinity of PTFE coating on Teflon high-temperature cloth. Cooling rate regulation is most direct and effective: Rapid cooling (quenching) via cold air curtains, cooling rollers or water tanks — molecular chains freeze before ordered arrangement, forming tiny imperfect crystals; coating is soft, tough with optimized non-stick performance, slightly reduced hardness/wear resistance. Slow cooling (annealing) via heat preservation section at 10-50°C/h or furnace cooling — molecular chains fully arrange into large complete spherulites; coating has high hardness, outstanding wear resistance, stable dimensions, reduced flexibility and increased brittleness.
