The sandwich concept

DIAB sandwich

What is the sandwich concept?

By separating two materials and place a lightweight material in between these, we get a structure which increases the stiffness and the strength, although the total weight becomes lower. In principle, a sandwich contains two surface laminates glued or laminated on to a core material. The laminates relieve pressure and give the construction strong, solid surfaces. The core material absorbs all pressures and divide them on to a large area.

What are the benefits of using DIAB’s sandwich materials?

The sandwich construction offers advantages in both flexural strength and stiffness compared to single laminates. By doubling the thickness of the core, one achieves an immense increased stiffness in the panel without significant weight gain. Havsterk uses DIAB group’s composite sandwich solutions in the production. DIAB’s advanced core material, Divinycell, used together with strong Vacuum Infusion Laminates, offer the ideal combination of strength and stiffness. DIAB’s structural cores and composite sandwich solutions represent ideal plastic composite materials which give optimal weight.

The strength-to-weight ratio in a sandwich construction gives many benefits; higher speed, longer distances, larger payloads and less engine power used, combined giving improved operating economics. DIAB’s sandwich materials also offer:

  • High dynamic strength: The core material Divinycell has dynamical properties making it ideal for situations in which shocks and hits can occur.
  • Water absorption: Divinycell has closed cells and is therefore impervious to water and moisture.
  • Effective isolation: Divinycell’s isolation and acoustical properties eliminate the need for additional isolation normally used in other

Read more about how DIAB’s composite-sandwich works: