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X, XX, XXX PHENOLIC (PAPER BASED)

Material: Available in: , ,

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 X, XX, and XXX Phenolics are made up of a mixture of phenolic resin and paper and are the lowest costing material in the phenolic family. This blend provides good mechanical properties, with each “X” designating different levels of dielectric strengths and mechanical properties. Grade X has excellent mechanical properties but is not recommended for applications where electrical properties are important and humidity is high, Grade XX is suitable for general electric insulation, and Grade XXX has excellent electrical insulating strength and does well in humid environments but has weaker mechanical properties. Paper based phenolics make a great choice for punch parts, insulating washers, spacers, terminal boards, switch bases, and other electrical components. It is available in plate, rod, and tube. Grade X meets MIL-I-24768/12 TYPE PBM Grade XX meets MIL-I-24768/11 TYPE PBG Grade XXX meets MIL-I-24768/10 TYPE PBE

Application

  • Punch parts
  • Insulating washers
  • Spacers
  • Terminal boards
  • Switch bases
  • Electrical components
  • Sleeves
  • Panel boards

Properties

  • Easy to machine
  • Lowest cost of phenolics
  • Good wear resistance
  • Low moisture absorption
  • Good mechanical strength
  • Strong and stiff
  • High impact and compressive strength

Specifications

PhysicalAstm Test MethodPaperCanvasLinen
Density (lb/in^3)D7920.0490.050.048
Specific GravityD7921.351.371.34
Water Absorption @ 24 hours (%)D57022.51.8
Mechanical
Tensile Strength (PSI) Lengthwise, CrosswiseD63815,000 and 12,00011,000 and 9,00013,000 and 9,000
Flexural Strength (PSI) Lengthwise, CrosswiseD79016,000 and 13,20017,500 and 15,00022,000 and 16,000
Compressive Strength (PSI)D69532,00037,00037,000
Flexural Modulus (KPSI) Lengthwise, CrosswiseD7901,100.000 and 900.0001,600,000 and 1,500,0001,600,000 and 1,200,000
Izod Impact (Notched), ft-lb/in Lengthwise, CrosswiseD256.65 and .601.70 and 1.501.35 and 1.10
Rockwell HardnessD785M100M100M110
Thermal
Coefficient of Thermal Expansion,
10^-5/°F Lengthwise, Crosswise
D696.80 and 1.201.10 and 1.221.00 and 1.060
Continous Service Temp (Operating), °F257257285
Thermal Conductivity, BTU-in/hr-ft² °FC1772.032.032.03
Flammability RatingUL94HBHBHB
Electrical
Dielectric Strength, Short Term,
(Volts/Mil) @ .125″ Thick
D149750 (XX)550 (CE)625 (LE)
Arc Resistance (sec)D4951101515
Dielectric Constant at 1 MHzD150556
Dissipation Factor at 1 MHzD1500.0450.045

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.

 

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