Electrical Grade Sheet Laminates
All grades of Polyply industrial sheet are produced using polyester reinforcements in and fiberglass reinforcement. They are U.L.recognized and are available in 36"x72" and 48"x96" sheet. Sheets are manufactured in thicknesses ranging from 1/32" to 2" with most sizes in stock for immediate shipment.
Polyply L-40. Low cost, general purpose flame retardant electrical laminate which meets or exceeds NEMA GPO-2 requirements. Polyply L-50. Track resistant, flame retardant laminate which meets or exceeds NEMA GPO-3 requirements. Polyply L-50HT. Track resistant, High Temperature laminate.
|General Information||Unit||ASTM/UL Test No.||Typical Average Values|
|U.L. Recognized File Number||E82624||E82624||E82624|
|Flexural Modules||psi x 106||D790||1.2||1.23||1.28|
|Izod Impact Strength (notched)||ft-lb/in||D256||8.0||8.2||11.3|
|Water Absorption||% by weight||D570||0.23||0.21||0.28|
|Dielectric Strength (- in oil)||volts/mil||D149||415||400||420|
|Dielevtric Strength (parallel in oil)||kV||D149||61||57|
|High Voltage Arc Resistance||sec||D495||200+||200+||181|
|Dielectric Constant @ 60Hz||D150||4.6||4.8|
|Dielectric Constant @ M Hz||D150||4.5||4.7|
|Dissipation Factor @ 60 Hz||D150||.014||.013|
|Dissipation Factor @ M Hz||D150||.012||.011|
|Comparative Tracking Index||volts||D3638||500+||500+||600+|
|Flame Resistance Properties|
|U.L. Subject 94||UL94||VO||VO||HB|
|Coefficient of Thermal Expansion||in/in/C x 10-5||D696||2.0||2.0|
|U.L. Temperature Index-Electrical||°C||UL746B||130||130||220|
|U.L. Temperature Index-Mechanical||°C||UL746B||160||140||210|
All properties are based on 1/8" thick sheet.
Unless otherwise indicated, all properties published are based on tests performed on standard ASTM test samples and according to ASTM test methods. Values shown are for test samples made from production materials and they are believed to be typical. No warranty is expressed or implied.
|Nominal Thickness, Inches||Plus or Minus Tolerance, Inches||Nominal Tolerance, Inches||Plus or Minus Tolerance, Inches|
At least 90 percent of the area of the sheet shall be within the tolerances given, and at no point shall the thickness vary from the nominal by a value greater than 125 percent of this specified tolerance.