Transformer Board (Press Board T-IV)

 In Thermoset Plastics

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Transformer Board Characteristics

Transformer Board (Press Board T-IV) is a type of electrical insulation paper made of cellulose fibers.

  • Get a QuoteSuperior compression under static and dynamic loads
  • Excellent flexural strength
  • Good mechanical and electrical strength

Applications for Transformer Board

  • Spacers
  • Plates
  • Washers
  • Support strips
  • Gap barriers

Contact a Dielectric Manufacturing knowledge expert to discuss the use of transformer board for electrical insulation. Call 800-367-9122 or email sales@dielectricmfg.com.

Property Parameter unitsLB 3.1A.1+LB 3.1A.2++
Flexural StrengthMDMPa115130
CMD105120
CompressibilityC%2.72.2
C rev8384
InternalPly StrengthDry 23° CMPa112115
Dry 120 °C retention%<7973
Oiled 23 °C retention9697
Aged 23 °C retention9497
Apparent Densityg/cm81.241.30
MoistureContent%7.43.5
ShrinkageThickness%6.12.5
MD0.40.2
CMD0.60.3
Oil Absorption%12.510.01
AshContent%0.50.9
Conductivity of
aqueous extractmS/m10.56.5
Electric strength in oilkV/mm14.013.5
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