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TUFNOL Grade 1P/21 

Phenolic Paper laminate

Paper/phenolic resin laminated plastic

(SRBP - Synthetic Resin Bonded Paper)


An intermediate commercial paper grade

This grade is intermediate in its electrical performance between the high electrical specification of Kite Brand TUFNOL and the low cost Grade 1P/13.  It is produced to meet British Standard BS EN 60893-3-4 Type PF CP 203 and its water absorption and mechanical performance are also in the range between these two other grades. It is readily machined into components and can be hot punched, to produce items in thicknesses up to 3.2mm

 

What is Grade 1P/21 used for?

This material is usually selected where electrical performance slightly above that of a basic commercial paper grade is required, with a minimum effect on cost.  It is used for a wide range of electrical items, such as terminal boards, mounting panels and tag strips.


TYPES AVAILABLE

 

Sheets

 

Natural colour Grade 1P/21

Yes

Minimum order quantities may apply.


Click here for TUFNOL Grade 1P/21 Standard Sizes



SPECIFICATIONS for TUFNOL Grade 1P/21


BRITISH STANDARDS

Current Standards

Recent Standards

(now obsolete)

Sheet

BS EN 60893-3-4 Type PF CP 203

BS 2572 Type P2 & P2/1

Standard quality testing is to British Standards.



PHYSICAL PROPERTIES

TUFNOL Grade 1P/21 Sheet


PROPERTY

TYPICAL RESULT

UNITS

Cross breaking strength

175

MPa

Resistance to flatwise compression

1.3

%

Shear strength, flatwise

100

MPa

Water Absorption

 

 

- 1.6mm thick.

65

mg

- 3mm thick.

80

mg

- 6mm thick.

90

mg

- 12mm thick.

110

mg

Electric strength, flatwise in oil at 90ºC

 

 

- 1.6mm thick.

13

MV/m

- 3mm thick.

11

MV/m

- 6mm thick.

7.5

MV/m

- 12 mm thick.

5.4

 

Electric strength, edgewise in oil at 90ºC

40

kV

Insulation resistance after immersion in water

1x109

ohms

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.