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

TUFNOL Grade 6G/92 


Polyimide Glass Fabric laminate

Glass fibre/polyimide resin laminated plastic

(SRBGF - Synthetic Resin Bonded Glass Fabric)


High performance laminate for high temperature applications.

TUFNOL Grade 6G/92 is specially formulated for applications requiring excellent mechanical strength and insulation properties at elevated temperatures.  It is a strong, rigid material, with good dimensional stability and moisture resistance and good electrical properties.  It is resistant to a wide range of working environments and exhibits good thermal endurance properties at temperatures up to 250ºC. 

This grade is suitable for many applications requiring resistance to temperatures of 200ºC to 250ºC or short-term exposure to slightly higher temperatures.  It is naturally fairly flame retardant and can be readily machined into finished components, using standard machine tools with techniques similar to those used for machining epoxy glass materials.

 

What is TUFNOL Grade 6G/92 used for?

Tufnol polyimide glass laminate is widely used throughout industry, particularly in the aircraft industry, as electrical insulation and in industrial machinery where high temperatures are required.  Applications in general engineering range from heat barriers on plastic injection moulding machines, to support assemblies on diesel engine exhaust systems.

It is also used for certain high temperature applications where asbestos based materials were previously used.  Typical examples are:

                
      
  • Sealing rings in high temperature chemical plant
  •                     
  • Components on equipment for use in microwave ovens
  •                    
  •   Terminal plates for high temperature strain gauges
  •                    
  • Aircraft components, such as high temperature insulation on jet engines
  •                     
  • Electrical insulation fixtures for high temperature testing of solid state devices
  •                    
  • Scraper blades in high temperature processing

TYPES AVAILABLE

 

Natural colour (dark brown) only.

 

Sheet only,

or in machined components made from sheet


Click here for TUFNOL Grade 6G/92 STANDARD SIZES

 

SPECIFICATIONS for TUFNOL Grade 6G/92 


BRITISH STANDARDS

Current Standards

Recent Standards (now obsolete)

Sheet

BS EN 60893-3-7 Type PI GC 301

 

BS 3953 Type PI-1



PHYSICAL PROPERTIES

TUFNOL Grade 6G/92 Sheet


PROPERTY

TYPICAL RESULT

UNITS

Cross breaking strength

570

MPa

Cross breaking strength at 200ºC (after 1 hour at 200ºC)

470

 

Cross breaking strength at 200ºC (after 100 hours at 200ºC)

430

 

Impact strength, notched, Charpy

100

kJ/m2

Water Absorption

 

 

- 1.6mm thk.

30

mg

- 3mm thk.

32

mg

- 6mm thk.

38

mg

- 12mm thk.

45

mg

Electric strength, flatwise in oil at 90ºC

 

 

- 1.6mm thk.

17

MV/m

- 3mm thk.

11

MV/m

Electric strength, edgewise in oil at 90ºC

60

kV

Insulation resistance after immersion in water

5x1010

ohms

Loss tangent at 1 MHz

0.005

-

Permittivity at 1 MHz

4.8

-

Flammability category

FV1*

-

Relative density

1.85

-

Glass transition temperature Tg

260

ºC

Maximum working temperature**

250

 

Test methods as BS EN 60893-2, where applicable.

 

* This flammability category is applicable to sheets of nominal thickness 3mm and above.

** Prolonged exposure of resin-bonded materials to high temperature always reduces properties over time. Users of highly stressed components at temperatures approaching the maximum are recommended to seek further advice from Tufnol Composites Ltd.