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

 

Download Full Brochure

Product 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!

Get In Touch

We would love to hear from you! Please fill out this form and we will get in touch with you shortly.
  • This field is for validation purposes and should be left unchanged.

“Copyright © 2016 DuPont. All rights reserved. The DuPont Oval Logo, DuPont™, The miracles of science™ and all products denoted with ® or ™ are trademarks or registered trademarks of E. I. du Pont de Nemours and Company or its affiliates”

DISCLAIMER: The technical information contained herein is the result of extensive testing in the manufacturer’s laboratories. In addition any application advice given verbally, in writing or by testing corresponds to the best of our knowledge and belief. Since the use and application of any of our products lies beyond our area of control, it remains the responsibility of the user to verify the product’s suitability for their application.

Back to Top