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TUFNOL Grade 2F/14 

Cotton fabric laminate

Medium weave cotton/phenolic resin laminated plastic

(SRBF - Synthetic resin Bonded Fabric)


For electromechanical applications.

TUFNOL Grade 2F/14 is a cotton fabric laminate with enhanced electrical properties, specially developed to meet the requirements of the relevant British Standard specification.



What is Grade 2F/14 used for?

It is used for electro-mechanical applications where the benefits of mechanical toughness and wear resistance are combined with a need for good insulation resistance.  Typical uses include slot wedges, stator packings, coil formers and operating arms.



TYPES AVAILABLE

 

Sheets

 

Rods

 

Tubes

 

Other sections

Natural colour

Yes

No

No

No

 

 

 

 

 

   

*Minimum order quantities may apply.




SPECIFICATIONS for TUFNOL Grade 2F/14

 

BRITISH STANDARDS

Current Standards

Recent Standards

(now obsolete)

Sheet

BS EN 60893-3-4 Type PF CC 202

BS 2572 Types F4 & F5



PHYSICAL PROPERTIES

TUFNOL Grade 2F/14 Sheet

 

PROPERTY

TYPICAL RESULT

UNITS

Cross breaking strength

115

MPa

Impact strength, notched, Charpy

7.0

kJ/m2

Compressive strength, flatwise

290

MPa

Compressive strength, edgewise

215

MPa

Resistance to flatwise compression

1.4

%

Shear strength, flatwise

80

MPa

Water Absorption

 

 

- 1.6mm thk.

50

mg

- 3mm thk.

60

mg

- 6mm thk.

80

mg

- 12mm thk.

90

mg

Electric strength, flatwise in oil at 90ºC

 

 

- 1.6mm thk.

9.0

MV/m

- 3mm thk.

7.5

MV/m

- 6mm thk.

6.0

MV/m

Electric strength, edgewise in oil at 90ºC

35

kV

Insulation resistance after immersion in water

5x1010

ohms

Loss tangent at 1 MHz

0.047

-

Permittivity at 1 MHz

4.8

-

Relative density

1.33

-

Maximum working temperature**

 

 

- continuous

120

ºC

- intermittent

130

ºC

Thermal classification

Class E

-

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 Ltd.

 

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