TUFNOL materials for engineering

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.

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A full machining service is available from Tufnol Composites Ltd 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.