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TUFNOL Grade 2P/20 

Phenolic Paper laminate - Punching grade

Paper/phenolic resin laminated plastic

(SRBP - Synthetic Resin Bonded Paper)


A good quality electrical insulation material for punched parts

This is a specially formulated punching grade with properties similar to those of Kite Brand TUFNOL.  It meets BS EN 60893-3-4 Type PF CP 206 and has excellent electrical insulation properties.

TUFNOL Grade 2P/20 is available in thin sheet only and it punches satisfactorily in thicknesses up to 3.2mm (1/8"). It may be heated up to a maximum temperature of 80ºC for punching where required to produce an intricate profile. Lower temperatures will give satisfactory results for more simple shapes.

 

What is Grade 2P/20 used for?

Grade 2P/20 is used where punched parts are required from a good quality, rigid insulation material.  A wide range of small electrical components are made from this material, including tag strips, mounting boards, component holders, switch operating arms, insulating washers, plug bases and back plates.


TYPES AVAILABLE

 

Sheets

 

Natural colour Grade 2P/20

Yes

Minimum order quantities may apply.


Click here for TUFNOL Grade 2P/20 Standard Sizes



SPECIFICATIONS for TUFNOL Grade 2P/20

 

BRITISH STANDARDS

Current Standards

Recent Standards

(now obsolete)

Sheet

BS EN 60893-3-4 Type PF CP 206

BS 2572 Type P3

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



PHYSICAL PROPERTIES

TUFNOL Grade 2P/20 Sheet


PROPERTY

TYPICAL RESULT

UNITS

Cross breaking strength

120

MPa

Compressive strength, flatwise

350

MPa

Resistance to flatwise compression

2.0

%

Shear strength, flatwise

90

MPa

Water Absorption

 

 

- 1.6mm thick.

42

mg

- 3mm thick.

46

mg

Electric strength, flatwise in oil at 90ºC

 

 

- 1.6mm thick.

13

MV/m

- 3mm thick.

12

MV/m

Electric strength, edgewise in oil at 90ºC

50

kV

Insulation resistance after immersion in water

5x109

ohms

Loss tangent at 1 MHz

0.037

-

Permittivity at 1 MHz

4.5

-

Relative density

1.36

-

Maximum working temperature**

 

 

- continuous

90

ºC

- intermittent

120

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 Composites Ltd.