Types

Composition

Operating temperature range, ^оС

Applications and distinguishing characteristics

Dimensions

EP GC 21

Woven glass cloth;
epoxy resins

from - 65 to + 155

Mechanical, electrical and electronic applications. Extremely high mechanical strength at moderate temperatures. Very good stability of electrical properties when exposed to high relative humidity.

Limiting internal diameter, mm: 7,5 ­ 600
Limiting external diameter, mm: 10,0 ­ 640

Length, mm - 1000 mm

EP GC 22

Woven glass cloth;
epoxy resins, hot strength retention

from - 65 to + 180

Similar to EP GC 21, but with high mechanical strength at elevated temperature

Limiting internal diameter, mm: 7,5 ­ 600
wall thickness, mm: 10,0 ­ 640

Length for tubes of internal diameter 10-100 mm:
500 - 1000 mm

Length for tubes of internal diameter 105-550 mm:
500 - 1200 mm

IEC 61212-3-1

EP GC 21

EP GC 22

Property

Test method

Unit

Minimum
or
maximum

Values

Requirement

Typical

Requirement

Typical

Flexural strength perpendicular to laminations

ISO 178

MPa

minimum

300

350

300

350

Axial compressive strength

ISO 604

MPa

minimum

175

190

175

190

Cohesion between layers

IEC 61212-2

MPa

minimum

200

250

200

250

Breakdown voltage at 90°C in oil parallel to laminations

IEC 60243-1

kV

minimum

40

40

40

40

Electrical strength at 90°C in oil perpendicular to laminations
(wall thickness =2 mm),

IEC 60243-1

kV/mm

minimum

9

12

9

12

Insulating resistance after immersion in water

IEC 60167

MΏ

minimum

1000

1×10⁵

1000

1×10⁵

Dissipation factor
1 Mhz
48-60 Hz

IEC 60250

­

maximum

maximum

0,04
0,05

0.02
0.02

0,04
0,05

0.02
0.02

Permittivity at 1 Mhz

IEC 60250

­

maximum

5,2

5.0­

5,2­

5.0

Termal endurance

IEC 60216-1

ISO 178

TI

minimum

150

180

Water absorption

ISO 62

mg/cm²

maximum

1,5

1,5

1,5

1,5