HIGH TEMPERATURE

Another important property that needs to be fulfilled for this type of products is the adhesion to glass. As it has been previously mentioned, both polymer materials have acceptable intrinsic adhesion properties, but they can always be increased by the use of special additives to the corresponding polymer material. In principle EVA is a better adhesion material than PVB. PVB has an acceptable to low adhesiveness to glass. It has also a high higroscopicity... PVB has an average of 8-9 times higher tendency to permeate water than EVA. This property gives to EVA a great advantage compared to PVB in terms of transportation, storage and use. Not just that also in terms of product resistance against weathering conditions. Normally due to capillarity PVB laminates suffer from water penetration around the edges and glass lamination pieces angles affecting negatively the durability and the mechanical resistance of the laminate... Due to their molecular structures and arrangements they are..