Laminated glazing

摘要

A laminated glazing comprising an SPD ply comprising a suspended particle device having a low light transmission off-state and a high light transmission on-state, at least one interlayer ply comprising an interlayer material, and at least one glazing ply is disclosed. The interlayer material has been dried to a predetermined moisture content to increase the time over which the suspended particle device is switchable between the low light transmission off-state and the high light transmission on-state. Use of a dried interlayer to increase the time over which an SPD film is switchable between a low light transmission off-state and a high light transmission on-state is also disclosed. Additionally a process for producing the aforementioned laminated glazing is disclosed. It has been found that the moisture content of the interlayer material is a factor in determining the switching characteristics over time of an SPD film incorporated into a laminated glazing.

主权项

1. A laminated switchable glazing comprising a suspended particle device, the laminated glazing comprising,
an SPD ply comprising the suspended particle device having a low light transmission off-state and a high light transmission on-state, at least one interlayer ply comprising an interlayer material, and at least one glazing ply, wherein the interlayer material has a predetermined moisture content of 0.23 weight % or lower prior to lamination to increase the time over which the suspended particle device is switchable between the low light transmission off-state and the high light transmission on-state state when compared to the time over which the suspended particle device is switchable between the low light transmission off-state and the high light transmission on-state when the suspended particle device is in an equivalent laminated glazing where the interlayer material has not been dried to moisture content of 0.23 weight % or lower.