TUFNOL materials for engineering

Carp Brand Tufnol

Cotton fabric based laminate
Fine weave cotton/phenolic resin laminated plastic

(SRBF – Synthetic Resin Bonded Fabric)

A top quality grade for mechanical and electromechanical applications.

Carp Brand TUFNOL is a top quality grade for mechanical and electromechanical applications. It is made from a premium quality fine weave cotton fabric which has been specially treated to enhance the machinability and other properties. Strong, with good wear resistance, it has excellent machining qualities and low water absorption, with good dimensional stability. Electrical properties are excellent for this class of material. Resistance to high impact, however, is slightly less than the coarser weave grades of Tufnol.

What is Carp Brand TUFNOL used for?

Carp Brand is used for a wide variety of components where premium quality is required. It is often chosen for components with intricate features which need accuracy and a fine machined finish. Typical components include fine toothed gears, cams, geneva wheels, seal retaining rings, actuating arms, insulating sleeves and bushes, components for use at cryogenic temperatures, insulation for low and medium voltages and a wide range of other precision machined parts.

TYPES AVAILABLE	Sheets	Rods	Tubes	Other sections
Natural colour	Yes	Yes	Yes	Yes
Black Carp Brand	Yes*
Graphite-impregnated Carp Brand	Yes*	Yes*	Yes*	Yes*

* Minimum order quantities may apply.

Click here for Carp Brand TUFNOL STANDARD SIZES

SPECIFICATIONS for Carp Brand TUFNOL

BRITISH STANDARDS	Current Standards	Recent Standards (now obsolete)
Sheet	BS EN 60893-3-4 Type PF CC 305	BS 2572 Type F1
Round Rod (Rolled & moulded)	BS EN 61212-3-3 Type PF CC 41
Rectangular Bar	BS 6128 Part 4 Type PF CC 41 & 42	(BS 6128 is now obsolete.)
Hexagon Bar	BS 6128 Part 6 Type PF CC 61 & 62
Round Tube	BS EN 61212-3-2 Type PF CC 31
Rectangular Tube	BS 6128 Part 13 Type PF CC 131
NEMA*
Sheet	NEMA LI-1-1983 Type LE
DIN*
Round Rod and Tube	DIN 7735 TYPE Hgw 2088 & 2089

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

PHYSICAL PROPERTIES

Carp Brand TUFNOL Sheet

PROPERTY	TYPICAL RESULT	UNITS
Cross breaking strength	150	MPa
Impact strength, notched, Charpy	8.6	kJ/m2
Compressive strength, flatwise	350	MPa
Compressive strength, edgewise	200	MPa
Resistance to flatwise compression	1.4	%
Shear strength, flatwise	105	MPa
Tensile strength	68	MPa
Young's modulus	6.5	GPa
Water Absorption
- 1.6mm thk.	55	mg
- 3mm thk.	70	mg
- 6mm thk.	90	mg
- 12mm thk.	125	mg
Electric strength, flatwise in oil at 90ºC
- 1.6mm thk.	7.2	MV/m
- 3mm thk.	4.9	MV/m
- 6mm thk.	4.0	MV/m
Electric strength, edgewise in oil at 90ºC	23	kV
Insulation resistance after immersion in water	7x109	ohms
Relative density	1.36	-
Maximum working temperature**
- continuous	120	ºC
- intermittent	130	ºC
Thermal classification	Class E	-
Thermal conductivity through laminae	0.37	W/(mK)
Thermal expansion in plane of laminae	1.9	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.

Carp Brand TUFNOL Round Tube

PROPERTY	TYPICAL RESULT	UNITS
Axial compressive strength	180	MPa
Cohesion between layers	140	MPa
Water absorption	2.4	mg/cm2
Insulation resistance after immersion in water	5x108	ohms
Relative density	1.35	-

Test methods as BS EN 61212-2, where applicable.

Carp Brand TUFNOL Round Rod

PROPERTY	TYPICAL RESULT	UNITS
Flexural strength	170	MPa
Water absorption	2.5	mg/cm2
Insulation resistance after immersion in water	5x108	ohms
Axial electric strength in oil at 90ºC	15	kV
Relative density	1.35	-

Test methods as BS EN 61212-2, where applicable.

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A full machining service is available from Tufnol 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.