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TUFNOL materials for engineering
Heron Brand TUFNOL
Phenolic Paper laminate
Paper/phenolic resin laminated plastic
(SRBP - Synthetic Resin Bonded Paper)
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High specification phenolic paper laminate
Heron Brand TUFNOL is a first class electrical insulating material with very low moisture absorption. It is especially suitable for use in humid or tropical environments, where its electrical properties are retained to a high degree. It has excellent electric strength, very high insulation resistance after immersion in water and is designed to meet the highest electrical standard for phenolic paper materials in BS and IEC specifications. It machines well and can be hot punched in thicknesses up to 3.2mm.
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What is Heron Brand used for?
Heron Brand is used in electrical applications where high insulation performance is required, with stable properties in a moist or humid environment. Items such as terminal boards, mounting plates, cover plates and insulating spacers have frequently been made. This grade has been largely superseded by the use of epoxy and other materials in such applications and is retained in our range for instances where it is needed for particular specification requirements.
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TYPES AVAILABLE
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Sheets
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Rods
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Tubes
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Other sections |
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Heron Brand – natural colour only |
Yes |
No |
No |
No |
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* Minimum order quantities may apply.
SPECIFICATIONS for Heron Brand TUFNOL
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BRITISH STANDARDS |
Current Standards |
Recent Standards (now obsolete) |
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Sheet |
BS EN 60893-3-4 Type PF CP 204 |
BS 2572 Type P4 |
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NEMA* |
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Sheet |
NEMA LI-1-1983 Type XXXP |
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DIN * |
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Sheet |
Hp 2062.8 & Hp2063 |
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*Testing and certification to these standards is subject to special enquiry. Standard quality testing is to British Standards.
PHYSICAL PROPERTIES
Heron Brand TUFNOL Sheet
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PROPERTY |
TYPICAL RESULT |
UNITS |
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Cross breaking strength |
146 |
MPa |
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Impact strength, notched, Charpy |
2.7 |
kJ/m2 |
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Compressive strength, flatwise |
350 |
MPa |
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Compressive strength, edgewise |
215 |
MPa |
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Resistance to flatwise compression |
1.2 |
% |
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Shear strength, flatwise |
110 |
MPa |
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Water Absorption |
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- 1.6mm thk. |
20 |
mg |
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- 3mm thk. |
25 |
mg |
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- 6mm thk. |
30 |
mg |
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- 12mm thk. |
45 |
mg |
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Electric strength, flatwise in oil at 90ºC |
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- 1.6mm thk. |
19 |
MV/m |
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- 3mm thk. |
15 |
MV/m |
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- 6mm thk. |
10 |
MV/m |
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- 12mm thk. |
7 |
MV/m |
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Electric strength, edgewise in oil at 90ºC |
60 |
kV |
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Insulation resistance after immersion in water |
2x1011 |
ohms |
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Loss tangent at 1 MHz |
0.035 |
- |
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Permittivity at 1 MHz |
4.9 |
- |
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Relative density |
1.36 |
- |
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Maximum working temperature** |
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- continuous |
90 |
ºC |
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- intermittent |
120 |
ºC |
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Thermal classification |
Class E |
- |
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Thermal conductivity through laminae |
0.27 |
W/(mK) |
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Thermal expansion in plane of laminae |
1.7 |
x 10-5/K |
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Specific heat |
1.5 |
kJ/(kgK) |
Test methods as BS EN 60893-2, where applicable.
**Users of highly stressed components at temperatures approaching the maximum are recommended to seek further advice from Tufnol Composites Ltd.
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A full machining service is available from Tufnol for this and many other engineering plastics and composites.
Tufnol Composites Ltd, Wellhead Lane, Perry Barr, Birmingham B42 2TB, United Kingdom.
Quality Registration BS EN ISO 9001:2000, BS EN 9100:2003 and AS 9100 Reg. No. FM 90942
The information given here is believed to be correct, but completeness and accuracy are not guaranteed. The user shall be fully responsible for determining the suitability of products for the intended use.
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TUFNOL is a Registered Trade Mark.
Copyright © 2000 – 2005 Tufnol Composites Ltd. All rights reserved.
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