Insulating Materials

Gamma takes care of every detail of the insulation of motors (DC / LV / MV / HV, HV, traction) and generators, finding the optimal solutions for each case.

All this thanks to the internal Insulating Laboratory and the collaboration with leading companies – such as Isovolta AG, Gebauer & Griller Gmbh, Relats Sa – of which Gamma converts and distributes products.


  • In the Gamma Insulating Materials Laboratory are performed the following tests on materials:

    • Analysis of composition
    • Density measurement
    • Dielectric strength test up to 60 kV
    • Dry arc resistance test
    • Index of resistance to creeping currents
    • Tensile, bending and compression tests

  • Mica tape for insulation of coil
    Sheaths, laces and flexible hoses: tested lacing cords, insulation of terminals and connections, wiring, protection and EMI shielding for electric cables
    VPI technology: insulating tapes using VPI insulation system
    VPI impregnating resins
    Preconsolidation and auxiliary materials
    Resin Rich Technology: insulating tapes using Resin Rich system
    Conductive and semi-conductive materials: glass fabric tape impregnated with resin containing carbon black; EGSB, semi conductive thermosetting PET-fabric tape
    Coil head insulation: sealing tapes for coil head and hydro-power
    Insulating materials, release agents and finishers produced by DuPont®
    Flexible insulating materials
    Coated fabrics C-stage
    Prepregs B-stage
    Adhesive insulating tapes
    Silicone coated materials: release agents for coils using Resin Rich technology
    Glass based laminetes for machined parts
    Cotton/paper based laminates with phenolic resin, for machined parts
    Ripple Springs, insulating/conductive springs
    Glass based special laminates
    Micanite for collectors
    Shrinkable release films for bars
    Fire-resistant mica tapes, fireproof insulation for special cables