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Norplex-Micarta RT509

Grade RT509 has good electrical properties under humid conditions and excellent arc resistance. Typical applications include fuse tubes and switchboard insulation. RT509 also complies with MIL-I-24768/1, Type GME and ASTM D709 Type IV Grade G-9 and IEC 61212-3-1-MFGC 21.

Polymer Name: Melamine Formaldehyde (MF)

Reinforcement Material: Glass Fibers

Physical Form: Tube

Density: 1950.0 - 1950.0 kg/m³

Features: Arc Resistant, Electrically Insulating, Good Electrical Properties, UL Listed, Very Good Heat Resistance

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Properties

Physical Form
Physical Properties
ValueUnitsTest Method / Conditions
Specific Gravity (0.75" ID x 1.00" OD)1.95ASTM D792
Rockwell Hardness (0.75" ID x 1.00" OD)115M ScaleASTM D785
Moisture Absorption (0.75" ID x 1.00" OD, Condition D1-24/23)1%ASTM D570
Tensile Strength (0.75" ID x 1.00" OD, Condition A)26500psiASTM D638
Compressive Strength (0.75" ID x 1.00" OD, Condition A)33500psiASTM D695
Compressive Modulus (0.75" ID x 1.00" OD, Condition A)1000kpsiASTM D695
Thermal Properties
ValueUnitsTest Method / Conditions
Temperature Index (0.75" ID x 1.00" OD)150/150°C
Flammability Rating (0.75" ID x 1.00" OD, Condition A)V-0ClassUL Bulletin 94
Electrical Properties
ValueUnitsTest Method / Conditions
Breakdown Voltage (0.75" ID x 1.00" OD, Condition A)55kVoltsASTM D149
Breakdown Voltage (0.75" ID x 1.00" OD, Condition D-336/50)50kVoltsASTM D149
Breakdown Voltage (0.75" ID x 1.00" OD, Condition D-48/50)30kVoltsASTM D149
Electric Strength (0.75" ID x 1.00" OD, Condition A)350Volts/milASTM D149
Electric Strength (0.75" ID x 1.00" OD, Condition D-48/50)340Volts/milASTM D149

Regulatory & Compliance