The laminating of glass has become increasingly popular in recent years as specifiers and architects prefer the safety properties of the product to single toughened glass. Laminated toughened is now the product of choice in commercial building projects around the UK and beyond. There are two types of laminating – Ethylene Vinyl Acetate (EVA) film and Polyvinyl Butyral (PVB) film. Both are two different polymer materials that can be used for glass laminated structures.
The PVB has been the reference material for the glass lamination on building construction and transportation industries for many years. EVA is challenging currently PVB as a lamination material because of some advantageous properties. In fact is a good material also for such type of applications, and is able to fulfil all the key properties that are required to PVB today. Not just that, it is also able to overcome some of the drawbacks of the PVB, outperforming PVB. Due to the lower adhesive properties of PVB, the film needs to be processed in autoclaves, where the pressure applied to the lamination structures helps to improve the limited properties of PVB. This process requires larger production lines and higher volumes of glass to be produced. EVA on the other hand, can be produced is small quantities in smaller workshops and requires a far lower initial investment in machinery.
The Glass Machinery Company offer solutions for both systems. Bovone & Maroso for PVB lines and MicroGlass for EVA.