LamiPressVario (LPV)

First, a few words about the history of its development. Fotoverbundglas GmbH has been producing photo-laminated glass together with the glass industry for several years. Customers have been coming to us, however, with increasingly individual and therefore more difficult to materialize ideas. The industry simply couldn't keep up with its mass production and tests that it had to conduct. The conventional processes (pre-laminate > autoclave) failed to provide the required degree of precision needed to combine multi-colored PVB films with each other (smoothly). FVB thereupon decided to look around in the field of autoclave-free laminates. The autoclave-free lamination system primarily seeks water-free films such as EVA. In this connection, a pure vacuum laminate has only few problems with bubble formation or other inclusions.

If you're committed to PVB (safety glass), however, you'll need an additional pressure system to support the vacuum. Without an additional pressure application, as in our LamiPressVario, you won't have bubble-free success with films processed with a residual moisture of 35% at 20 degrees centigrade. The singular vacuum system requires a residual moisture of 10% or less for PVB films. And if you wish to print these films digitally, so that you can bond them as a design element, additional solvents in the inks will create further problems for you. It has been our experience that these solvents (and high-boilers) can be tamed only with additional pressure in the laminate. When you consider the vapor pressure of water at 130°C, this is easy to understand. At this temperature, water vapor generates a pressure of 2.5 bar. Without additional pressure, such as is possible in our LamiPressVario system, the "vacuum pressure" of -0.95 bar would be far from being able to absorb the vapor.

Our LamiPress system has been thoroughly tested and is ready to be used in mass production, and a patent is pending. We're now able to process PVB films, including printing, with our system in a normal environment and then bond them as LSG. Whether it's float, TSG, or semi-tempered glass, you have no limits. Montages in glass, consisting of several films, also work, as does bonding with adhesive films and silk-screen printed (metallic tones) films. Wire meshes and substances are also no problem. Of course, the films can also be used in autoclave-free bonding.