PFC-3 is a high-strength composite material. It uses thermosetting linear phenolic resin as the base material and high-strength polyester fiber fabric as the reinforcement. Synthesized through advanced technology under specific temperature and pressure, it exhibits high load-bearing capacity, temperature resistance, wear resistance, excellent dimensional stability, flexibility, and impact resistance. It is suitable for guide and support rings in high-pressure cylinders operating under strong vibration conditions (e.g., excavators, piling machinery, and coal mining equipment). When filled with a certain amount of solid lubricants, it can also be used in various mechanical components such as bushings, bearings, and thrust washers.