Laminated glass for vehicle
There is provided a laminated glass for vehicle including a suspended particle device film excellent in property of switching transmittance of light for a long term by suppressing deterioration over time of the suspended particle device film, in particular, deterioration due to intrusion of moisture at an end portion. A laminated glass for vehicle includes: a pair of glass plates opposing each other; a pair of intermediate bonding layers in contact with opposing surfaces of the pair of glass plates respectively; a suspended particle device film arranged in a predetermined region in a region corresponding to a region except at least a part of band-shaped regions of peripheral edge portions of a main surface of the glass plate, between the pair of intermediate bonding layers; and a barrier layer arranged in the band-shaped regions between the pair of intermediate bonding layers and having predetermined adhesiveness and predetermined moisture permeability.
1. A laminated glass for vehicle, comprising:
a pair of glass plates opposing each other;
a pair of intermediate bonding layers in contact with opposing surfaces of the pair of glass plates respectively;
a suspended particle device film arranged in a predetermined region in a region corresponding to a region except at least a part of band-shaped regions of peripheral edge portions of a main surface of the glass plate, between the pair of intermediate bonding layers; and
a barrier layer arranged in the band-shaped regions between the pair of intermediate bonding layers and having the following adhesiveness (A) and the following moisture permeability (B),
the adhesiveness (A): an adhesive strength to the glass plate is 40 N/25 mm or more, which is measured in conformity with JIS K 6864-2: 1999 under conditions of an adhesion temperature of 110° C., a test piece width of 25 mm, a testing rate of 300 mm per minute, and a peel angle of 180 degrees, and
the moisture permeability (B): a moisture permeability at a temperature of 40° C. and a humidity of 90% RH measured in conformity with JIS Z 0208: 1976 is 50 g/m 2 ·day or less,
wherein a layer having a planar shape corresponding to the shape of the main surface of the glass plate is formed by the suspended particle device film and the barrier layer between the pair of the intermediate bonding layers.
2. The laminated glass for vehicle according to claim 1 , wherein a planar shape of the barrier layer is a frame shape, and the suspended particle device film is arranged to make an end face thereof come into contact with an end face on an inside of the barrier layer in the predetermined region that is a whole region excepting an arrangement region of the barrier layer from the region corresponding to the main surface of the glass plate.
3. The laminated glass for vehicle according to claim 1 , wherein at least one of the pair of intermediate bonding layers has both the adhesiveness (A) and the moisture permeability (B).
4. The laminated glass for vehicle according to claim 1 , wherein the barrier layer is a resin containing a modified block copolymer hydride [3] obtained by introducing an alkoxysilyl group into a block copolymer hydride [2] obtained by hydrogenating 90% or more of all unsaturated bonds of a block copolymer [1], the block copolymer [1] being composed of at least two polymer blocks [A], each containing a repeating unit derived from an aromatic vinyl compound as a main component, and at least one polymer block [B] containing a repeating unit derived from a chain conjugated diene compound as a main component and having a ratio of wA to wB (wA:wB) being 30:70 to 60:40 when a mass fraction of the all polymer blocks [A] to the entire block copolymer is set to wA and a mass fraction of the all polymer blocks [B] to the entire block copolymer is set to wB.
5. The laminated glass for vehicle according to claim 1 , wherein at least one of the pair of intermediate bonding layers is a resin containing a modified block copolymer hydride [3] obtained by introducing an alkoxysilyl group into a block copolymer hydride [2] obtained by hydrogenating 90% or more of all unsaturated bonds of a block copolymer [1], the block copolymer [1] being composed of at least two polymer blocks [A], each containing a repeating unit derived from an aromatic vinyl compound as a main component, and at least one polymer block [B] containing a repeating unit derived from a chain conjugated diene compound as a main component and having a ratio of wA to wB (wA:wB) being 30:70 to 60:40 when a mass fraction of the all polymer blocks [A] to the entire block copolymer is set to wA and a mass fraction of the all polymer blocks [B] to the entire block copolymer is set to wB.
6. The laminated glass for vehicle according to claim 1 , wherein the barrier layer has a portion whose width is 10 mm or less.
7. The laminated glass for vehicle according to claim 1 , wherein the maximum width of the barrier layer is 10 mm.
8. The laminated glass for vehicle according to claim 1 , not comprising a black ceramic layer.
9. The laminated glass for vehicle according to claim 1 , further comprising:
a functional film between the pair of glass plates and the pair of intermediate bonding layers.
10. The laminated glass for vehicle according to claim 1 , wherein a thickness of the barrier layer is substantially the same as a thickness of the suspended particle device film.