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Heron Brand TUFNOL

Phenolic Paper laminate

Paper/phenolic resin laminated plastic

(SRBP - Synthetic Resin Bonded Paper) 


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.

 

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  This grade has been largely superseded by the use of epoxy and other materials in such applications and is retained in our range for instances where it is needed for particular specification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.

 

TYPES AVAILABLE

 

Sheets

 

Rods

 

Tubes

 

Other sections

Heron Brand – natural colour only

Yes

No

No

No

 

 

 

 

 


*Minimum order quantities may apply.



SPECIFICATIONS for Heron Brand TUFNOL


BRITISH STANDARDS

Current Standards

Recent Standards (now obsolete)

Sheet

BS EN 60893-3-4 Type PF CP 204

BS 2572 Type P4

NEMA*

 

 

Sheet

NEMA LI-1-1983 Type XXXP

 

DIN *

 

 

Sheet

Hp 2062.8 & Hp2063

 

 

*Testing and certification to these standards is subject to special enquiry.   Standard quality testing is to British Standards.



PHYSICAL PROPERTIES

Heron Brand TUFNOL Sheet


PROPERTY

TYPICAL RESULT

UNITS

Cross breaking strength

146

MPa

Impact strength, notched, Charpy

2.7

kJ/m2

Compressive strength, flatwise

350

MPa

Compressive strength, edgewise

215

MPa

Resistance to flatwise compression

1.2

%

Shear strength, flatwise

110

MPa

Water Absorption

 

 

- 1.6mm thk.

20

mg

- 3mm thk.

25

mg

- 6mm thk.

30

mg

- 12mm thk.

45

mg

Electric strength, flatwise in oil at 90ºC

 

 

- 1.6mm thk.

19

MV/m

- 3mm thk.

15

MV/m

- 6mm thk.

10

MV/m

- 12mm thk.

7

MV/m

Electric strength, edgewise in oil at 90ºC

60

kV

Insulation resistance after immersion in water

2x1011

ohms

Loss tangent at 1 MHz

0.035

-

Permittivity at 1 MHz

4.9

-

Relative density

1.36

-

Maximum working temperature**

 

 

- continuous

90

ºC

- intermittent

120

ºC

Thermal classification

Class E

-

Thermal conductivity through laminae

0.27

W/(mK)

Thermal expansion in plane of laminae

1.7

x 10-5/K

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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