Our new edge seal concept is based on thin metal foils. These are sufficiently gas-tight and “elastic” at the same time, thus allowing a flexible edge seal that could compensate thermal expansion much better. With this concept, a bigger glazing size and a better thermal insulation value is achievable for VIG.
In a first step, the feasibility of a VIG unit with a Ug-value of 0.5 W/(m2K) was demonstrated. This was done within the project VIG that was funded by the German Federal Ministry of Economics and Technology (BMWi). The results are presented in the final report (In German language) .
The follow-up project ProVIG, also funded by the BMWi, concentrated on the development of suitable joining methods for the edge seal. A concept for the economic production of VIG within a vacuum chamber was developed and a demonstration plant was built to evaluate the individual process steps.
Appropriate methods for the quality assurance and for the testing of VIG were developed and evaluated. The results are presented in the final report.
VIG with this new edge seal is not commercially available yet.