Phenolic resin grades can be confusing — ISO, DIN, GB, and ASTM each have their own naming systems. This article maps these systems together so you can quickly identify the right grade for your application.
Global Phenolic Resin Classification Systems
Four Key Performance Indicators
Practical Selection Guide
Choose PF7 or equivalent high-heat grade. Standard PF2 will soften, discolor, and crack under sustained high heat.
Choose PF5 or mineral-filled grades. Pure phenolic has high friction coefficient — graphite or copper-filled compounds wear better.
Choose electrical grade phenolic resin (equivalent to GB 4013), with arc resistance and low water absorption requirements.
Verify FDA certification. Non-certified materials cannot be used in food-contact parts.
Common Selection Mistakes
- Choosing by price alone: PF2 is cheap, but using it in high-temperature conditions leads to quick failure and higher total cost.
- Ignoring fillers: PF5 with wood flour vs. glass fiber reinforcement have vastly different properties.
- Skipping chemical resistance check: Phenolic resin is sensitive to strong alkalis and oxidizers.
Send your working conditions (temperature, pressure, medium) — I'll recommend the right grade.
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