Phenolic resin, chemically known as Phenol Formaldehyde Resin (abbreviated PF), is the world's first industrially produced synthetic plastic. Invented in 1907 by Belgian-American chemist Leo Baekeland, it has been in use for over 115 years.
How is Phenolic Resin Made?
Phenolic resin is produced through a condensation polymerization reaction between phenol (C6H5OH) and formaldehyde (HCHO) under alkaline or acidic catalyst conditions. Based on catalyst type and process, it falls into two main categories:
Key Physical Properties of Bakelite
Phenolic vs Other Engineering Plastics
- Heat Resistance: Phenolic resin operates at 200C continuously; nylon softens at 120C, POM at ~100C.
- Dimensional Stability: Phenolic water absorption is extremely low (<0.1%), dimensions barely change with humidity; nylon absorbs 3-5%.
- Chemical Resistance: Stable against most organic solvents, oils, and weak acids/alkalis; nylon is sensitive to strong acids.
- Cost Advantage: Raw material cost is lower than PEEK or PTFE — use phenolic when its properties are sufficient.
Manufacturing Processes
Best for high-volume production, high efficiency and dimensional precision. Our factory's 2M pcs/year output mainly uses this process.
Suited for large, thick-walled or complex parts. Lower mold cost but less efficient than injection. Used for large valve discs and seats.
Between injection and compression. Ideal for parts with metal inserts — prevents insert displacement during molding.
Typical Applications
- Machine Tools: Handwheels, levers, knobs, operating handles — insulated, wear-resistant, oil-resistant.
- Electrical Control Cabinets: Terminals, insulation pads, switch knobs — heat resistant, dimensionally stable.
- Food Machinery: Steam and cleaning agent resistant, non-toxic (food-grade phenolic meets FDA standards).
- Valves and Piping: Valve discs, seats, gaskets — corrosion and heat resistant.
- Instruments and Meters: Dials, knobs, housings — refined appearance, clear characters, wear-resistant printing.
Selection Summary
Phenolic resin is not a universal material, but in terms of heat resistance, wear resistance, insulation, corrosion resistance, and dimensional stability, it offers one of the best cost-to-performance ratios. Not sure whether phenolic is right for your application? Send your drawings to 15503295692@163.com — I'll help you evaluate.
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