Paper Reinforced Phenolic is an exceptionally tough board made from wood fibre and phenolic polymers. The “X” designations generally distinguish manufacturing processes which result in different levels of electrical properties (i.e., dielectric strengths). Paper-based phenolics with enhanced mechanical and electrical properties are available in a variety of sheet, rod, and tube sizes. One of the most common applications for paper reinforced phenolic is printed circuit board substrates (PCB). These PCB materials are known as FR-1 and FR-2 – FR-2 is rated to 130 °C, FR-1 is rated to 105 °C.
Grade X material results in a tough laminate with high impact resistance, excellent tensile, compressive and flexural strengths. Although it has excellent mechanical properties, it is not recommended for applications where electrical properties are important and humidity is high.
Features:
Grade XX is copper in color and most commonly used in general electric insulation. Applications include barriers, breaker arms, switch panel boards, and relay and switch bases. This product meets the requirements of MIL-I-24768/11, Type PBG.
Features:
Grade XXX is recommended for most mechanical applications and properties because of its high dielectric strength and good resistance to moisture. Excellent choices for Grade XXX applications are intricate punch parts, insulating washers, spacers, terminal boards, switch bases and other electrical components.
Features:
Emco Industrial Plastics doesn’t claim to represent all of the manufacturers or trade name products listed. This list is intended as a guide of typical materials available for purchase from Emco Industrial Plastics, Inc. For additional information, contact an Emco Industrial Plastics representative by filling out the form below.
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Request Fabrication/Machining ServicesGeneric Name
Phenolics, Paper Reinforced
Available In
Sheet, Rod, Tube
Certifications
NEMA X per MIL-I-24768/12 PBM; NEMA XX per MIL-I-24768/11 PBG; NEMA XXX per MIL-I-24768/10 PBE
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| Type | Size | Length | Color |
|---|---|---|---|
| Sheet | 0.03″ – 10″ TH | Up to 48″ x 96″; CTS | Natural, Dark Brown, Black |
| Rod | 1/16″ – 6″ DIA | Std. foot lengths; CTS | Natural, Dark Brown, Black |
| Tube | Available |
Give us your cut-to-size dimensions. We will precision-cut these plastics to your exact size. Additional sizes and colors available upon request.
| Physical Properties | Units | ASTM | Results |
|---|---|---|---|
| Density | lb/in³ | D792 | 0.049 |
| Water Absorption, 24 hrs | % | D570 | 2 |
| Mechanical Properties | Units | ASTM | Results |
|---|---|---|---|
| Tensile Strength – Lengthwise | psi | D638 | 15000 |
| Tensile Strength – Crosswise | psi | D638 | 12000 |
| Flexural Strength – Lengthwise | psi | D790 | 16000 |
| Flexural Strength – Crosswise | psi | D790 | 13200 |
| Flexural Modulus – Lengthwise | psi | D790 | 1100000 |
| Flexural Modulus – Crosswose | psi | D790 | 900000 |
| Compressive Strength | psi | D695 | 32000 |
| Hardness, Rockwell R | D785 | M100 | |
| IZOD Impact Strength Notched – Lengthwise | ft-lb/in | D256 | 0.65 |
| IZOD Impact Strength Notched – Crosshwise | ft-lb/in | D256 | 0.6 |
| Thermal Properties | Units | ASTM | Results |
|---|---|---|---|
| Coefficient of Linear Thermal Expansion – Lengthwise | (x 10⁻⁵ in./in./°F) | D696 | 0.8 |
| Coefficient of Linear Thermal Expansion – Crosswise | (x 10⁻⁵in./in./°F) | D696 | 1.2 |
| Max Operating Temp | °F | 257 | |
| Thermal Conductivity | BTU-in/ft²-hr-°F | C177 | 2.03 |
| Flammability Rating | UL94 | H – B |
| Electrical Properties | Units | ASTM | Results |
|---|---|---|---|
| Dielectric Strength, 1/8″ th. | V/mil | D149 | 750 (XX) |
| Dielectric Constant @ 1 MHz | D150 | 5 | |
| Dissipation Factor @ 1 MHz | D150 | 0.045 | |
| Arc Resistance | sec | D493 | 110 |
NOTE: The property values presented above 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.
NOTE: Several grades of this material are available. For additional information regarding this plastic, contact your Emco Industrial Plastics representative or call 973-862-4148.
