Paper-based phenolics are the most economical of laminates, yet provide good electrical and mechanical properties. For greater strength and machining versatility, cotton fabric phenolics are often the choice. Fiber glass based grades have the best dimensional stability and mechanical strength, as well as low moisture absorption, but they are more difficult to machine when compared to the cotton fabric or paper based grades. Fiber glass based grades have the best dimensional stability and mechanical strength, as well as low moisture absorption, but they are more difficult to machine when compared to the cotton fabric or paper based grades. NP193M 17 oz. aramide and “soft glass” fibers are combined to make a fabric that is stronger than pure aramide and less abrasive than fiber glass fabrics. This material is impregnated with a melamine resin matrix. Applications include compressor and pump vanes. Variations of this material may be developed for specific applications. NP501 - NEMA GRADE FR-4 HIGH TEMPERATURE Woven fiber glass fabric with epoxy resin system. Engineered to provide improved properties over NEMA Grade FR-4 in applications involving thermal stress, such as reflow and solder pallets. NP502 Fiber glass fabric epoxy laminate. Provides NEMA Grade FR-4 properties at lower cost than NP130. MIL-I-24768/27, type GEE-F and the obsolete MIL-P-18177D, type GEE. Material is available in green color only.
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