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CALMICA ® 70 0866, 70 0867

CALMICA ® 70 0866, 70 0867

CALMICA ® 70 0866 consists of mica paper based on a uncalcined muscovite, impregnated with B-stage epoxy resin and a PET-film as carrier. CALMICA ® 70 0866 is a flexible mica paper compound which shows excellent process ability and high dielectric strength due to the PET-film. In order to prevent blocking, the flexibility of CALMICA ® 70 0867 is lower.
CALMICA ® 70 0866 is supplied polyethylene The insulation with with CALMICA ® 70 0866 is supplied without polyethylene release film.

Applications

CALMICA ® 70 0866 and CALMICA ® 70 0867 is used e.g. for the insulation of bars and coils of high voltage motors and generators where high resin flow (higher than e.g. CALMICA ® 70 900) is needed.  CALMICA ® 70 0866 and CALMICA ® 70 0867 are applied in full width (roll) or as tape.  Forming and curing is done in a hot press.

Format
Rolls maximum width 1000 mm
Tapes from 10 mm width upward

Storability

Minimum 6 months at 20 °C
Minimum 12 months at 5 °C

 

Processing Advice
Temperature 130 – 180 °C
Pressure 2 – N/mm²
Time 8.0 – 0.5 hours
Example: 1 hour at 160°C and 2 N/mm²

Fully cured status is achieved after 4 hours at 160°C

 

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CALMICA ® 70 0866, 70 0867

Description

Technical Data   70 0866 700867
Properties

Test Method

Unit Value Value Value
Nominal thickness IEC 60371-2 mm 0.17 ± 0.02 0.16 ± 0.02 0.19 ± 0.02*
Total substance IEC 60371-2 g/m² 267 ± 25 262 ± 20 300 ± 25
Mica paper IEC 60371-2 g/m² 160 ± 15
59.9
160 ± 15
61.1
160 ± 15
53.3
Epoxy resin IEC 60371-2 g/m² 65 ± 6
24.3
70 ± 7
26.7
70 ± 7
23.3
PET-film IEC 60371-2 µm
g/m²
30
42 ± 4
23
32 ± 3
50
70 ± 7
Tensile strength IEC 60371-2 N/cm ≥ 30 ≥ 30 ≥ 30
Breakdown voltage IEC 60243-1 kV ≥ 5 ≥ 5 ≥ 5
Thermal class IEC 60216-2   155 (F) 155 (F) 155 (F)
Volatile content IEC 6071-2 % ≥ 1 ≥ 1 ≥ 1

* Available only on request!