Thermosettting Plastics Selection Guide
| Selection and Application Guide | |||||
|---|---|---|---|---|---|
| NEMA Grade | Specification | Base Material | Resin | Major Application Requirements | Typical Use |
| X | MIL-I-24768/12 | Paper | Phenolic | High tensile & fluxural strength | washers |
| XX | MIL-I-247658/11 | Paper | Phenolic | Excellent in both dry & high humidity conditions | Relay & switch bases |
| XXX | MIL-I-24768/10 | Paper | Phenolic | High humidity resistance, good dimensional stability | Panelboards |
| LE | MIL-I-24768/13 | Fine Weave Fabric | Phenolic | Good machining qualities, mechanical & electrical strength, moisture resistance | Marine relay bases, terminal boards |
| LE | MIL-I-24768/15 | Fine Weave Fabric | Phenolic | High mechanical strength, good appearance, strength in punching | Fine tooth gears |
| CE | MIL-I-24768/14 | Medium Weave Fabric | Phenolic | Low-voltage, low frequency electrical performance | Marine switchboard panels |
| C | MIL-I-24768/16 | Medium Weave Fabric | Phenolic | Good mechanical properties with especially high impact strength | gears, spacers |
| G-5 | MIL-I-24768/8 | Glass Cloth | Melamine | High mechanical strength & hardness, high arc & heat resistance | Arc barriers, switchboard panels |
| G-9 | MIL-I-24768/1 | Glass Cloth | Melamine | High mechanical strength & hardness, high arc & heat resistance | Marine switchboard panels |
| G-10 | MIL-I-24768-2 | Glass Cloth | Epoxy | Good machining qualities, high flexural, impact & bond strength at room temperature, good electrical properties under dry conditions | electrical-mechanical applications, terminal boards |
| FR-4 | MIL-I-24768/27 | Glass Cloth | Epoxy | Self-extinguishing, good machining, & punching qualities, high flexural, impact & bond strength at room temperatures | terminal boards |
| G-11 | MIL-I-24768//3 | Glass Cloth | Epoxy | Retention of high mechanical strength at room temperature up to 150 degrees C, self-extinguishing | Rotor slot insulation |
| G-7 | MIL-I-24768/17 | Glass Cloth | Silicone | Excellent heat and arc resistance, good electrical properties under humid conditions | heating appliance insulation |
| G-3 | MIL-I-24768/18 | Glass Cloth | Phenolic | Excellent mechanical and machining properties | gaskets, seals |
| GPO-1 | MIL-I-24768/4 | Glass Material | Polyester | Good electrical properties and physical strength | Barriers, wedges |
| GPO-2 | MIL-I-24768/5 | Glass Material | Polyester | Self-extinguishing, good electrical and mechanical grade | Spacers, terminal boards |
| GPO-3 | MIL-I-24768/6 | Glass Material | Polyester | Self-extinuishing, good dielectric strength, arc and track resistance | arc chutes, barriers |
Selection & Application Guide - Thermoset
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