FILM ADHESIVES EFA 1753 and EFA-1752

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(Structural adhesives for honeycomb sandwich fabrication)

Vikram Sarabhai Space Centre of Indian Space Research Organization has developed an epoxy film adhesive; EFA-1753 (300 GSM) and EFA-1752 (200 GSM) (in the form of continuous film) that cures at elevated temperature 175 °C for 1 h and they possess good adhesive strength and filleting properties. Light-weight honeycomb sandwich structures are extensively made using epoxy film adhesives with precisely controlled glue line thickness. Film adhesive can also be used by shipping and boat manufacturing industries also, for fabrication of sandwich structures and other composite assemblies.

Salient Features

  • One-component, heat curable, toughened, high strength polymeric film adhesive.
  • Heat curable (175°C for 1 h).
  • Ensures filleting during curing, leading to very high bond strength in honeycomb sandwich
  • Space qualified.
    Properties
    Values
    Areal density, GSM [Two types]
    300±20 (EFA 1753) and 200±20 (EFA 1752)
    Lap shear strength at 25°C (Al/Al), MPa
    ≥ 25
    LSS at 130°C (Al/Al), MPa
    ≥ 12
    LSS at -196°C(Al/Al), MPa
    ≥ 25
    Honeycomb Flat wise tensile strength at 25°C , MPa
    ≥ 4
    TML, %
    ≤ 1.0
    CVCM, %
    ≤ 0.1

ISRO is willing to offer this technology to eligible interested parties who are in the field of manufacturing similar items

Interested entrepreneurs are requested to contact the address given below with all relevant particulars regarding their line of current activity, infrastructure available, market assessment of the product, financial arrangements made, turn over and sales of their products for the past years and a copy of their latest annual report.

For further details please contact: [email protected]