Laminated glass

Patent metadata

Field	Value
Publication number	US-2017190151-A1
Application number	US-201615395312-A
Country	US
Kind code	A1
Filing date	Dec 30, 2016
Priority date	Jan 6, 2016
Publication date	Jul 6, 2017
Grant date	—

Abstract

A laminated glass includes a first glass plate, a second glass plate, and an interlayer interposed between the first glass plate and the second glass plate. The first glass plate includes a first main surface arranged on a side opposite to the interlayer and a second main surface in contact with the interlayer, while the second glass plate includes a third main surface in contact with the interlayer and a fourth main surface arranged on a side opposite to the interlayer. The laminated glass includes a first region located on the first main surface and a second region which is located on the fourth main surface and at least a part of which overlaps the first region in a plane view. The first region and the second region have a given glass-surface smoothness.

First claim

1 . A laminated glass comprising:
a first glass plate; and a second glass plate bonded to the first glass plate with an interlayer disposed therebetween, the laminated glass comprising: a first main surface of the first glass plate arranged on a side opposite to the interlayer; a second main surface of the first glass plate being in contact with the interlayer; a third main surface of the second glass plate being in contact with the interlayer; a fourth main surface of the second glass plate arranged on a side opposite to the interlayer; a first region located on the first main surface; and a second region which is located on the fourth main surface and at least a part of which overlaps the first region in a plane view, wherein at least one of the first region and the second region has an arithmetical mean height of roughness profile Ra of 0.5 μm or less, a mean length of roughness-profile elements RSm of 40 μm or less, an arithmetical mean height of waviness profile Wa of 10 μm or less, and a mean length of waviness-profile elements WSm of 60 mm or less, as provided for in JIS B 0601:2013.

2 . The laminated glass according to claim 1 , wherein the second main surface and the third main surface are top surfaces and the first main surface and the fourth main surface are bottom surfaces.

3 . The laminated glass according to claim 1 , comprising:
a non-first region different from the first region located on the first main surface; and a non-second region different from the second region located on the fourth main surface, wherein at least one of the non-first region and the non-second region has an arithmetical mean height of roughness profile Ra of larger than 0.5 μm, a mean length of roughness-profile elements RSm of larger than 40 μm, an arithmetical mean height of waviness profile Wa of larger than 10 μm, and a mean length of waviness-profile elements WSm of larger than 60 mm, as provided for in JIS B 0601:2013.

4 . The laminated glass according to claim 2 , comprising:
a non-first region different from the first region located on the first main surface; and a non-second region different from the second region located on the fourth main surface, wherein at least one of the non-first region and the non-second region has an arithmetical mean height of roughness profile Ra of larger than 0.5 μm, a mean length of roughness-profile elements RSm of larger than 40 μm, an arithmetical mean height of waviness profile Wa of larger than 10 μm, and a mean length of waviness-profile elements WSm of larger than 60 mm, as provided for in JIS B 0601:2013.

5 . The laminated glass according to claim 1 , wherein
the first glass plate has one or more first stripes, the second glass plate has one or more second stripes, and the first stripe and the second stripe both extend in a first direction, the first direction being a direction perpendicular to a cross-section in which a radius of curvature of the first main surface is minimum among cross-sections each including a normal line at a center of gravity of the laminated glass.

6 . The laminated glass according to claim 2 , wherein
the first glass plate has one or more first stripes, the second glass plate has one or more second stripes, and the first stripe and the second stripe both extend in a first direction, the first direction being a direction perpendicular to a cross-section in which a radius of curvature of the first main surface is minimum among cross-sections each including a normal line at a center of gravity of the laminated glass.

7 . The laminated glass according to claim 3 , wherein
the first glass plate has one or more first stripes, the second glass plate has one or more second stripes, and the first stripe and the second stripe both extend in a first direction, the first direction being a direction perpendicular to a cross-section in which a radius of curvature of the first main surface is minimum among cross-sections each including a normal line at a center of gravity of the laminated glass.

8 . The laminated glass according to claim 4 , wherein
the first glass plate has one or more first stripes, the second glass plate has one or more second stripes, and the first stripe and the second stripe both extend in a first direction, the first direction being a direction perpendicular to a cross-section in which a radius of curvature of the first main surface is minimum among cross-sections each including a normal line at a center of gravity of the laminated glass.

9 . The laminated glass according to claim 5 , wherein the first direction is an upside and downside direction for the laminated glass mounted on a vehicle.

10 . The laminated glass according to claim 1 , wherein
a third region of the first glass plate has a first refractive index, a fourth region of the second glass plate has a second refractive index, and a fifth region of the interlayer has a third refractive index, the laminated glass having a sixth region where the third region, the fourth region, and the fifth region overlap each other in a plane view, wherein the second refractive index and the third refractive index are in a range of ±2.8%, exclusive of +2.8% and −2.8%, with respect to the first refractive index as a center.

11 . The laminated glass according to claim 10 , wherein the sixth region is a transmission region for signals of reception or transmission to at least one of an information-receiving device and an information-transmitting device.

12 . The laminated glass according to claim 11 , wherein the first region and the second region are located on the sixth region.

Assignees

• Asahi Glass Co Ltd

Inventors

• Hamano Tadashi
• Yajima Toshimi

Classifications

• B32B17/10036

  comprising two outer glass sheets · CPC title

• G01S2013/9323

  Alternative operation using light waves · CPC title

• G01S2013/93276

  in the windshield area · CPC title

• G01S7/4813

  Housing arrangements · CPC title

• B32B17/10788

  containing ethylene vinylacetate · CPC title