Leader in machined plastics and resin bonded fabrics Engineering plastics and composites

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.