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1. (WO2007122428) GLAZING
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CLAIMS

1 A laminated glazing comprising first and second plies of glass having an interlayer structure laminated therebetween, the interlayer structure comprising a first sheet of an interlayer material framing a suspended particle device film incorporated therein, wherein the interlayer material components do not comprise a plasticizer, or comprise a plasticizer that does not migrate into the suspended particle device film.

2 The laminated glazing of claim 1, wherein the first sheet of interlayer material is laminated between a second and a third sheet of an interlayer material, each in contact with and co-extensive with one of the first and second plies of glass, the suspended particle device film being in contact with at least one sheet of interlayer material.

3 The laminated glazing of claim 1 or 2, wherein at least one of the first, second 3 and third sheets of interlayer material is one of ethylene vinyl acetate copolymer, polyurethane, polycarbonate, poly vinyl chloride or a copolymer of ethylene and methacrylic acid.

4 The laminated glazing of claim 3 further comprising a fourth sheet of interlayer material and a barrier layer, the barrier layer being between the first and third sheets of interlayer material, or the third and fourth sheets of interlayer material.

5 The laminated glazing of claim 4, wherein the barrier layer is poly ethylene terephthalate.

6 The laminated glazing of claim 4 or 5, wherein the fourth sheet of interlayer material is poly vinyl butyral.

The laminated glazing of claim 6, wherein the fourth sheet of interlayer material is coloured and/or has acoustic properties.

The laminated glazing of any of claims 1 to 7, wherein the suspended particle device film comprises a coloured substrate.

The laminated glazing of any of claims 1 to 8, further comprising a poly ethylene terephthalate substrate having a heat reflective solar control coating and a fifth sheet of an interlayer material, interposed between the fourth sheet of interlayer material and the second ply of glass.

The laminated glazing of any of claims 1 to 9, wherein at least one sheet of interlayer material has solar control properties.

The laminated glazing of any of claims 1 to 10, further comprising at least one of a solar control, heat reflective, low-emissivity, hydrophobic or hydrophilic coating.

The laminated glazing of any of claims 1 to 11, further comprising a third ply of glass, separated from the second ply of glass by an air gap.

The laminated glazing of any preceding claim, wherein the thickness of the suspended particle device film is of the same order as the first layer of interlayer material.

A laminated glazing substantially as described herein, and with reference to Figures 2 to 7 of the accompanying drawings.