C PHENOLIC (CANVAS BASE / PHENOLIC RESIN)
Material Information
Phenolics are thermoset resins formed by the polymerization of phenol and formaldehyde, which can then be impregnated with cotton canvas or linen, paper, or glass cloth materials to form industrial laminates. Overall, industrial laminates are dense, strong and durable, moisture resistant, lightweight, and will not soften when heat is reapplied. Typically they have high mechanical and insulating properties. Grade C Phenolic is made up of a mixture of phenolic resin and medium weave cotton cloth fabrics. This blend provides good wear resistance, low moisture absorption, and good mechanical strength. However, Grade C Phenolic is not typically recommended for electrical applications. Grade C Phenolic canvas base makes it stronger and more machinable than paper based phenolics, which makes it ideal for structural supports, piston rings, gears, spacers, and bearings. Grade C Phenolic is available in plate, rod, and tube. C Phenolic meets MIL-I-24768/16 TYPE FBMApplication
- Structural supports
- Piston rings
- Gears
- Spacers
- Bearings
- Pulleys
- Rollers
- Guides
Properties
- Easy to machine
- Low cost
- Good wear resistance
- Low moisture absorption
- Good mechanical strength
- Strong and stiff
- High impact and compressive strength
- Excellent moldability/stability
- Good water and chemical resistance
Specifications
| Physical | Astm Test Method | Paper | Canvas | Linen |
|---|---|---|---|---|
| Density (lb/in^3) | D792 | 0.049 | 0.05 | 0.048 |
| Specific Gravity | D792 | 1.35 | 1.37 | 1.34 |
| Water Absorption @ 24 hours (%) | D570 | 2 | 2.5 | 1.8 |
| Mechanical | ||||
| Tensile Strength (PSI) Lengthwise, Crosswise | D638 | 15,000 and 12,000 | 11,000 and 9,000 | 13,000 and 9,000 |
| Flexural Strength (PSI) Lengthwise, Crosswise | D790 | 16,000 and 13,200 | 17,500 and 15,000 | 22,000 and 16,000 |
| Compressive Strength (PSI) | D695 | 32,000 | 37,000 | 37,000 |
| Flexural Modulus (KPSI) Lengthwise, Crosswise | D790 | 1,100.000 and 900.000 | 1,600,000 and 1,500,000 | 1,600,000 and 1,200,000 |
| Izod Impact (Notched), ft-lb/in Lengthwise, Crosswise | D256 | .65 and .60 | 1.70 and 1.50 | 1.35 and 1.10 |
| Rockwell Hardness | D785 | M100 | M100 | M110 |
| Thermal | ||||
| Coefficient of Thermal Expansion, 10^-5/°F Lengthwise, Crosswise | D696 | .80 and 1.20 | 1.10 and 1.22 | 1.00 and 1.060 |
| Continous Service Temp (Operating), °F | – | 257 | 257 | 285 |
| Thermal Conductivity, BTU-in/hr-ft² °F | C177 | 2.03 | 2.03 | 2.03 |
| Flammability Rating | UL94 | HB | HB | HB |
| Electrical | ||||
| Dielectric Strength, Short Term, (Volts/Mil) @ .125″ Thick | D149 | 750 (XX) | 550 (CE) | 625 (LE) |
| Arc Resistance (sec) | D495 | 110 | 15 | 15 |
| Dielectric Constant at 1 MHz | D150 | 5 | 5 | 6 |
| Dissipation Factor at 1 MHz | D150 | 0.045 | 0.045 | – |
Disclosure: The information contained herein are typical values intended for reference and comparison purposes only. They should NOT be used as a basis for design specifications or quality control. Contact us for manufacturers’ complete material property datasheets. All values at 73°F (23°C) unless otherwise noted.