Grade X Paper Phenolic is a thermoplastic polymer reinforced with paper fibers. It is a light-weight material which can be used in a variety of applications as a more-durable glass substitute. Paper-based phenolic is the most economical of the laminates, yet provides significant electrical properties and good mechanical properties. The more X’s the better the electrical properties, while the fewer X’s represent superior mechanical properties. Paper grades can be modified by adding plasticizers to make them more conducive to punching resulting in a “P” suffix added to the “X” designation (XP, XXP, XXXP).
- Grade X certifies to MIL-I-24768/12 (PBM),
- MIL-I-24768/19 (PBM-P)
- MIL-I-24768/20 (PBM-PC)
- MIL-I-24768/24 (PBM-PF)