Laminated glass
There is provided a laminated glass excellent in sound insulating property. A laminated glass includes: a pair of glass plates facing each other; and an intermediate film sandwiched between the pair of glass plates, including alternately laminated at least one skin layer and two or more core layers, wherein the skin layer has a glass transition point of 15° C. or higher, and each of the core layers has a glass transition point of less than 15° C., and a ratio of a mass of the intermediate film with respect to a total mass of the intermediate film and the pair of glass plates is 14 mass % or more.
1. A laminated glass comprising:
a pair of glass plates facing each other; and
an intermediate film sandwiched between the pair of glass plates, including alternately laminated at least one skin layer and two or more core layers,
wherein
the intermediate film includes the at least one skin layer to be in contact with facing surfaces of the pair of glass plates, and a distance Ta between a pair of the core layers which are the closest to the pair of glass plates is 0.45 mm or more,
the skin layer has a glass transition point of 15° C. or higher, and each of the core layers has a glass transition point of less than 15° C.,
the skin layer has a thickness of 0.15 to 1.1 mm, and
a ratio of a mass of the intermediate film with respect to a total mass of the intermediate film and the pair of glass plates is 14 mass % or more.
2. The laminated glass according to claim 1 , wherein
the intermediate film includes the at least one skin layer to be in contact with the facing surfaces of the pair of glass plates, and a surface density of whole layers disposed between a pair of the core layers which are the closest to the pair of glass plates is 0.5 kg/m 2 or more.
3. The laminated glass according to claim 1 , wherein
the intermediate film includes three or more core layers.
4. The laminated glass according to claim 1 , wherein
the laminated glass is for an automobile,
a thickness of a glass plate on a vehicle exterior side is 1.6 to 2.5 mm, and
a thickness of a glass plate on a vehicle interior side is 0.5 to 1.6 mm.
5. The laminated glass according to claim 1 , wherein
a thickness Tb of the intermediate film is 1.53 mm or more.
6. The laminated glass according to claim 1 , wherein
a surface density of the laminated glass is 12 kg/m 2 or less.
7. The laminated glass according to claim 1 , wherein
a loss factor at a primary resonance point measured in a frequency domain of 0 to 10000 Hz at a temperature of 20° C. is 0.4 or more.
8. The laminated glass according to claim 1 , wherein
the total number of core layers ranges from 2 to 6.
9. The laminated glass according to claim 1 , wherein
a distance Ta between the outermost core layers ranges from 0.45 to 4.0 mm.
10. The laminated glass according to claim 1 , wherein
a distance Ta between the outermost core layers ranges from 0.5 to 2.94 mm.
11. The laminated glass according to claim 1 , wherein
a thickness Tb of the sum of the thicknesses of the core layers and the at least one skin layer ranges from 1.5 to 4.0 mm.
12. The laminated glass according to claim 1 , wherein
a thickness Tb of the sum of the thicknesses of the core layers and the at least one skin layer ranges from 1.50 to 3.80 mm.
13. The laminated glass according to claim 1 , wherein
each core layer thickness ranges from 0.05 to 0.2 mm.
14. The laminated glass according to claim 1 , wherein
each skin layer has a thickness of 0.2 to 1.09 mm.
15. The laminated glass according to claim 1 , wherein
an outermost core layer in the intermediate layer surface density ranges from 0.5 to 3.3 kg/m 2 .
16. The laminated glass according to claim 1 , wherein
an outermost core layer in the intermediate layer surface density ranges from 0.55 to 3.23 kg/m 2 .
17. The laminated glass according to claim 1 , wherein
a surface density of the laminated glass ranges from 8 to 13.5 kg/m 2 .
18. The laminated glass according to claim 1 , wherein
a surface density of the laminated glass ranges from 9.92 to 13.34 kg/m 2 .
19. The laminated glass according to claim 1 , wherein
a ratio of a mass of the intermediate film with respect to a total mass of the intermediate film and the pair of glass plates mass % ranges from 14 mass % to 50 mass %.
20. The laminated glass according to claim 1 , wherein
a ratio of a mass of the intermediate film with respect to a total mass of the intermediate film and the pair of glass plates mass % ranges from 14.3 mass % to 36.6 mass %.