POROBAND ® SI 0790 consists of mica paper based on calcined muscovite with aramid fibres and glass cloth as carrier.  A modified silicon resin is used as binder.  POROBAND ® SI 0790 has excellent flexibility and shows no mica flaking during machine-taping.


POROBAND ® SI 0790 is used for the insulation of coils of traction machines with thermal classification 200 in VPI-technology, using solvent-free silicon resins.

Rolls maximum width 1000 mm
Tapes from 10 mm width upward


Minimum 12 months at 20°C
Maximum 24 months at 5°C


Download Full Brochure

Product Description

Properties Test Method Unit Value
Nominal thickness IEC 60371-2 mm 0.12 ± 0.02
Total substance IEC 60371-2 g/m² 163 ± 16
Mica paper IEC 60371-2 g/m² 120 ± 10
Aramid fibre content (of mica paper)   % 5 ± 2
Glass cloth IEC 60371-2 g/m² 25 ± 2
Resin content IPV 18.5.3 g/m² 18± 4
Breakdown voltage IEC 60371-1 kV ≥2.5
Tensile strength IEC 60371-2 N/cm ≥80
Air resistance (Curley) ISO 3687 s ≤ 4000
IEC 60371-2 IEC 60371-2   up to 240

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