VAP – Vacuum Assisted Process

The vacuum-assisted process (VAP®) is an infusion technique that makes use of modern semi-permeable membrane systems. As in the case of the conventional VARI process, the dry reinforcement fibre preform is positioned between a fixed-position lower mould and a vacuum set-up topped by a vacuum film. When the cavity between the lower mould and the film is evacuated the liquid resin system is sucked in and cross-links the reinforcement textiles. An integrated semi-permeable membrane offers significant advantages over conventional vacuum infusion processes in terms of evacuation and infiltration, with benefits including enhanced component quality, increased fibre volume content, lower porosity and a significant reduction in reject rates. Its special process characteristics make VAP® technology particularly suitable for large shell-like components and thick-walled structures.

Our service portfolio

  • Assessment of the suitability of the VAP® process for your component
  • VAP®-compatible component design
  • Development of a VAP® process for your component (including cost analysis)
  • Mould design and dimensioning
  • Prototype manufacturing using the VAP® process

Our facilities (used as part of our cooperation with the Institute of Lightweight Engineering and Polymer Technology (ILK) at
TU Dresden)

  • Vacuum pumps
  • Pressurized curing vessels
  • Cutting table for the preparation of reinforcement textiles and vacuum materials

The VAP® process facilitates the reliable infusion of complex components

Even complex preforms characterized by significant variations in wall thickness can be reliably infused using the VAP® process. The figure shows an example of an LZS-developed aviation component with wall thicknesses ranging between 6 mm and 30 mm. A similar version of the component is now in series production.

Contact person:
Dipl.-Ing. Felix Dehmel

+49 351 446960-13