Paper Reinforced Phenolic Resin Sheet & Leatheroid Fibre

Phenolic Paper Laminate

Phenolic paper laminate is a cost-effective electrical insulation material with excellent machinability and reliable dielectric properties. We stock standard NEMA-grade phenolic paper sheet alongside Leatheroid vegetable-tanned fibre. Giving customers versatile options for terminal boards, slot insulation, and general-purpose electrical isolation across manufacturing, power, and construction applications.

At a Glance

Temperature Range

Up to 120 °C continuous

Thickness Range

0.25 mm to 3.2 mm

Brands We Stock

Tufnol
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Technical Properties

Typical values across stocked grades. Specific grade data sheets available on request.

Material TypePaper reinforced phenolic resin laminate
NEMA GradesX, XX, XXX
Temperature ClassClass A (105 °C) to Class E (120 °C) per IEC 60085
Dielectric Strength≥ 10 kV/mm perpendicular to laminations (ASTM D149)
Volume Resistivity≥ 10⁹ Ω·cm dry; 10⁷ Ω·cm conditioned (ASTM D257)
Flexural Strength100–140 MPa lengthwise (ASTM D790)
Compressive Strength165–240 MPa flatwise (ASTM D695)
Density1.30–1.40 g/cm³
Water Absorption0.75–1.50 % (24 h immersion, ASTM D570)
Tracking Resistance (CTI)100–175 V (IEC 60112)
FlammabilityUL 94 HB (self-extinguishing grades available)
Thickness Range Stocked0.25 mm to 3.2 mm

Common Applications

  • Terminal boards and connection strips
  • Low-voltage insulating washers and spacers
  • Transformer coil insulation barriers
  • Switchboard insulation panels
  • Slot insulation for small motors
  • Electrical enclosure mounting plates
  • Coil bobbins and formers
  • General-purpose electrical insulation gaskets

Available Grades

Brands we stock: Tufnol

NEMA X

Standard paper phenolic grade with good electrical insulation properties and excellent machinability. Suitable for general-purpose insulation where mechanical loading is minimal.

NEMA XX

Intermediate-grade paper phenolic with improved flexural strength and better moisture resistance than Grade X. Our most popular phenolic paper grade for terminal boards and general insulation.

NEMA XXX

Premium paper phenolic grade offering the best electrical properties in the paper-base range, including lower dielectric loss and improved insulation resistance. Preferred for higher-voltage applications.

Leatheroid (Vegetable-Tanned Fibre)

Thin, flexible cellulose fibre sheet produced from vegetable-tanned materials. Available from 0.25 mm to 0.8 mm thickness. Good dielectric properties with excellent flexibility for wrapping, forming, and slot insulation where conformability is required.

Related Resources

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Gasket Selection Guide

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Need Phenolic Paper Laminate?

We supply phenolic paper laminate in sheet, roll, and custom die-cut forms. Contact our team for pricing, data sheets, or technical assistance.

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Disclaimer

This resource is provided for general engineering reference only and does not constitute professional advice, specification, or guarantee of performance. Actual results depend on specific application conditions. Universal Gaskets Pty Ltd accepts no responsibility or liability for decisions made based on this information. For full terms, see our Terms & Conditions.