Glastic TSF (GPO-1) Sheet (266ºF Fiberglass Reinforced Polyester Laminate – Most Cost Effective Grade in the GPO Series)

  • NEMA GPO-1
  • Extremely Cost-Effective
  • Outstanding Punchability
  • Ideal For A Variety Of Applications
  • UL Recognized
  • Easily Fabricated
  • Asbestos-Free

Grade TSF 1312 General-Purpose Laminate is the most cost-effective fiberglass-reinforced laminate sheet available from Glastic®. It is also a NEMA GPO-1 Laminate and UL Recognized.

Glastic Grade TSF 1312 is a UL Recognized material with a temperature index of 130ºC Electrical and 130ºC Mechanical. It is available in the brown, and in thicknesses of 1/32 of an inch through 1-1/4 inches.

Grade TSF 1312 exhibits outstanding punchability in thin thicknesses. It is widely used in motors ancell namery-type transformers, as well as a variety of other applications.


Flexural Strength ( psi )22300
Specific Gravity1.78
Water Absorption0.3 % by Wt.
Coefficient of Thermal Expansion ( in/in/ºC )2.2 x 10-5
Tensile Strength ( psi )9400
Compressive Strength ( psi )38900
Shear Strength ( psi )13400
Arc Resistance ( sec )127
Thermal Conductivity ( BTU-in/hr-ft²-ºF )1.8
Standard ColorBrown
Tensile Modulus ( psi )1.7 x 106
Flexural Strength at 130ºC ( psi )15400
Oxygen Index21.8 % Oxygen
IZOD Impact Strength (Notched) ( ft lb/in )0.8
Permittivity, 60 Hz4.2
Dissipation Factor, 60 Hz0.0095
Insulation Resistance ( ohm )2.4 x 1012
UL Temperature Index for Electrical ( ºC )130
UL Temperature Index for Mechanical ( ºC )130
UL Recognition File NumberE23525
UL Subject 94HB
Electrical Strength - Perpendicular S/T in Air ( vpm )417
Electrical Strength - Parallel S/S in Oil ( kV )44
Permittivity, MHz4.2
Dissipation Factor, MHz4.2
Electrical Strength - Perpendicular S/T in Oil ( vpm )493


Typical average values for testing 0.063 inch thick material. Values will vary somewhat from thickness to thickness within a material grade.

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