P10™ foam, electromagnetic wave absorber

P10™ foam has been marketed for over twenty years by DEMGY, which controls the entire process: from manufacturing to machining. P10™ foam makes it possible to fill a void inside a room, to reinforce it, without disturbing or altering the passage of electromagnetic waves. It is mainly used for Defense sectors.

Mousse P10

Mousse P10

Key benefits of P10™ foam

P10™ foam is a closed-cell rigid polyurethane foam.

These key features:

  • Very good mechanical rigidity.
  • Microwave transparency.
  • High temperature behavior.
  • Chemically stable.

 These main applications:

  • P10™ foam is generally used for the manufacture of radomes and antenna supports.
  • Because of its excellent thermal and mechanical properties, P10 ™ foam can also be used for structural applications as a complex composite sandwich.
  • For radio applications, the P10™ foam can also be impregnated in autoclaves with conductive fillers and becomes "MPU foam": see technical data in our catalog of microwave absorbers.
  • P10™ foam is easy to metallize and can therefore become conductive on the surface. See the characteristics of our EMC metallization.

The physical properties of P10™ foam

  1. Which structure?
    P10™ foam has a cellular structure of small cells. The P10™ foam can have inclusions up to 3 mm in diameter, with a limit of 10 inclusions per dm².
  2. What is the apparent density?
    Available grades (nominal apparent densities):
    48 kg / m3, 128 kg / m3, 225 kg / m3, 380 kg / m3.
    For each grade, the apparent density tolerance is +/- 15%.
    N.B: Other grades can be manufactured on request.
  3. What gross dimensions?
    Available in any machined form and any size in blocks of 600x600x200 mm or 300 * 300 * 200mm.
    Mechanical stress of P10™ foam.
    The compressive stress at room temperature must not be less than the following values:
  • Foam density 48 kg / m3: src> 0.5 MPa
  • Grade 128 kg / m3: src> 1.3 MPa
  • Grade 225 kg / m3: src> 3.5 MPa
  • Grade 380 kg / m3: src> 15 MPa

Radio properties at f = 10 GHz

  1. Which measuring bench?
    The dielectric constants "er" and dielectric losses "tan de" are controlled by a resonant cavity measurement at a frequency of 10 GHz using the vector network analyzer.
  2. Detail of grade 48 kg / m3.
    Dielectric constant "er" between 1.04 and 1.10.
    Tangent of losses "tan of" <6.20x10-4.
  3. Detail of grade 128 kg / m3.
    Tangent of losses "tan of" <1.96x10-3 .
  4. Detail of grade 225 kg / m3.
    Dielectric constant between 1.25 and 1.36.
    Tangent of tan losses of <2.82x10-3.
  5. Detail of grade 380 kg / m3.
    Dielectric constant between 1.40 and 1.73.
    Tangent of tan losses of <3.90x10-3.

What traceability is put in place for P10™ foam?

  1.  Traceability of the resin.
    The preparation of the resin is made in a reactor adapted to the foam block sizes to be expanded. Each batch of resin manufactured has an index in the form of a letter incremented with each new manufacture.
  2. Traceability of each foaming.

Each foaming carries an incremented letter for each new foaming campaign, and also refers to the batch of resin used.
Example: Lot of resin: D; foaming D / A on 28/05; Foaming D / B on June 20, etc ...

The declaration of conformity

Each delivery is accompanied by a declaration of conformity according to the NFL00-015 reference to the current index.