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TUFNOL Grades 10G/40,  10G/41,  10G/42 and  10G/44

Epoxy Glass Fabric laminate

Glass fibre/epoxide resin laminated plastic

(SRBGF - Synthetic Resin Bonded Glass Fabric)


Top quality materials for mechanical and electrical applications.

The TUFNOL range of high quality epoxy resin bonded glass fabric laminates offer very high mechanical strength and low moisture absorption, combined with excellent electrical properties, under both dry and humid conditions.  They are rigid materials with good dimensional stability and good resistance to a wide range of working environments.

Four standard grades are available:


 What are TUFNOL epoxy glass fabric materials used for?

These high performance materials are used for a very wide variety of applications where high strength, rigidity dimensional stability and electrical performance are required.  Applications such as insulation in large turbine generators, components for cryogenic superconducting magnets, high strength bolt insulation in structures, jigs for electro-chemical machining and structural insulation for high performance electronic equipment, these are typical of the many uses to which this material is put.  However, due to the abrasive nature of the high glass fibre content, epoxy glass grades are not normally selected for wearing or bearing applications.


TYPES AVAILABLE

 

Sheets

 

Rods

 

Tubes

 

Other sections

Grade 10G/40 – Natural colour

Yes

Yes

No

No

Grade 10G/41 – Natural colour

Yes

No

No

No

Grade 10G/42 – Natural colour

Yes

No

No

No

Grade 10G/44 - Natural colour

Yes

No

No

No

 

 

 

 

 



SPECIFICATIONS for TUFNOL Epoxy Glass Fabric Laminates


BRITISH STANDARDS

Current Standards

Recent Standards (now obsolete)

Grade 10G/40 Sheet

BS EN 60893-3-2 Type EP GC 201

BS 3953 Type EP-3

Grade 10G/40

Round Rod (Rolled & moulded)

BS EN 61212-3-3 Type EP GC 41 & 42

BS 6128 Part 2 Type EP GC 21

Grade 10G/41 Sheet

BS EN 60893-3-2 Type EP GC 202

BS 3953 Type EP-4

Grade 10G/42 Sheet

BS EN 60893-3-2 Type EP GC 203

BS 3953 Type EP-5

Grade 10G/44 Sheet

BS EN 60893-3-2 Type EP GC 203

 & BS 3953 Type EP-7

(BS 3953 will shortly become obsolete.)

 

 

 

NEMA*

 

 

Grade 10G/40 Sheet & Rod

NEMA LI-1-1983 Type G10

 

Grade 10G/41 Sheet

NEMA LI-1-1983 Type FR4

 

Grade 10G/42 Sheet

NEMA LI-1-1983 Type G11

 

Grade 10G/44 Sheet

NEMA LI-1-1983 Type G11

 


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



PHYSICAL PROPERTIES

TUFNOL Epoxy Glass Sheet


PROPERTY

Grade 10G/40

 

TYPICAL RESULT

Grade 10G/41

 

TYPICAL RESULT

Grade 10G/42

 

TYPICAL RESULT

Grade 10G/44

 

TYPICAL RESULT

UNITS

Cross breaking strength

490

470

490

490

MPa

Cross breaking strength at 150ºC

– (after 1 hour at 150ºC)

-

-

350

360

 

Cross breaking strength at 150ºC

– (after 100 hours at 200ºC)

-

-

-

250

 

Impact strength, notched, Charpy

60

60

60

60

kJ/m2

Compressive strength, flatwise

415

415

415

415

MPa

Compressive strength, edgewise

300

300

300

300

MPa

Tensile strength

355

-

-

-

MPa

Young's modulus

17.7

-

-

-

GPa

Water Absorption

 

 

 

 

 

- 1.6mm thk.

5

5

5

5

mg

- 3mm thk.

7

7

7

7

mg

- 6mm thk.

10

10

10

10

mg

- 12mm thk.

15

15

15

15

mg

Electric strength, flatwise in oil at 90ºC

 

 

 

 

 

- 1.6mm thk.

17

17

17

17

MV/m

- 3mm thk.

15

15

15

15

MV/m

- 6mm thk.

12

12

12

12

MV/m

Electric strength, edgewise in oil at 90ºC

75

75

70

70

kV

Insulation resistance after immersion in water

1x1011

5x1010

5x1010

5x1010

ohms

Relative density

1.90

1.95

1.90

1.90

-

Loss tangent at 1 MHz

0.017

0.017

0.017

0.017

 

Permittivity at 1 MHz

5.0

4.9

5.2

5.2

 

Comparative tracking index

285

260

290

290

 

Maximum working temperature**

 

 

 

 

 

- continuous

130

130

140

140

ºC

- intermittent

150

150

155

155

ºC

Thermal classification

Class B

Class B

 Class F

Class F

-

Thermal conductivity through laminae

0.42

0.42

0.45

0.45

W/(mK)

Thermal expansion in plane of laminae

1.1

1.0

1.2

1.2

x 10-5/K

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

 

TUFNOL Grade 10G/40 Round Rod

 

PROPERTY

Grade 10G/40

 

TYPICAL RESULT

UNITS

Flexural strength

600

MPa

Water absorption

0.5

mg/cm2

Insulation resistance after immersion in water

5x109

ohms

Axial electric strength in oil at 90ºC

70

kV

Relative density

1.90

-

Test methods as BS EN 61212-2, 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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