Glass laminate including reflective film

Patent metadata

Field	Value
Publication number	US-12049062-B2
Application number	US-201917274594-A
Country	US
Kind code	B2
Filing date	Sep 18, 2019
Priority date	Sep 24, 2018
Publication date	Jul 30, 2024
Grant date	Jul 30, 2024

Abstract

A glass laminate (100) including first and second glass layers (102,104), a reflective film (110) having opposed first and second major surfaces and disposed between the first and second glass layers (102,104) with the first and second major surfaces facing the respective first and second glass layers (102,104), a first adhesive layer (117) disposed between and bonding together the first glass layer (102) and the reflective film (110), and a second adhesive layer (119) disposed between and bonding together the second glass layer (104) and the reflective film (110) is described. The second adhesive layer (119) is thicker than the first adhesive layer (117) such that the first major surface of the reflective film (110) is separated from an outermost major surface of the first glass layer (102) by distance d1, the second major surface of the reflective film (110) is separated from an outermost major surface of the second glass layer (104) by a distance d2, and 0.05<d1/d2<0.9.

First claim

What is claimed is:

1. A glass laminate comprising:
first and second glass layers having substantially parallel outermost major surfaces facing away from one another;
a reflective film having opposed first and second major surfaces and disposed between the first and second glass layers with the first and second major surfaces facing the respective first and second glass layers, the reflective film having an average reflectance for a first polarization state in a predetermined visible wavelength range at a predetermined angle of incidence of at least 15% and an average transmittance for an orthogonal second polarization state in the predetermined visible wavelength range at the predetermined angle of incidence of at least 30%;
a first adhesive layer disposed between and bonding together the first glass layer and the reflective film; and
a second adhesive layer disposed between and bonding together the second glass layer and the reflective film, the second adhesive layer being thicker than the first adhesive layer such that the first major surface of the reflective film is separated from the outermost major surface of the first glass layer by a distance d 1 , the second major surface of the reflective film is separated from the outermost major surface of the second glass layer by a distance d 2 , and 0.05≤d 1 /d 2 ≤0.9.

2. The glass laminate of claim 1 , wherein 0.1≤d 1 /d 2 ≤0.8.

3. The glass laminate of claim 1 , wherein the second adhesive layer is at least 2 times thicker than the first adhesive layer.

4. The glass laminate of claim 1 , wherein the first adhesive layer has a thickness in a range of 1 micron to 75 microns and the second adhesive layer has a thickness in a range of 300 microns to 1000 microns.

5. The glass laminate of claim 1 , wherein the second glass layer is at least 1.5 times thicker than the first glass layer.

6. The glass laminate of claim 1 , wherein the average reflectance of the reflective film for the first polarization state in the predetermined visible wavelength range at the predetermined angle of incidence is at least 20%, and wherein the average transmittance of the reflective film for the second polarization state in the predetermined visible wavelength range at the predetermined angle of incidence is at least 50%.

Assignees

• 3M Innovative Properties Company

Inventors

• Vanderlofske Iii John F
• Franey Eileen M
• Pankratz Stephan J
• Johnson Matthew B
• Wheeler Brianna N
• Haag Adam D
• Gillette Kristy A
• Shaver Jonah

Classifications

• G02B27/0018

  with means for preventing ghost images (anti-reflection coatings G02B1/11) · CPC title

• G02B5/30

  Polarising elements (light-modulating devices with active elements G02F1/00) · CPC title

• B32B2307/42

  Polarizing, birefringent, filtering · CPC title

• B32B2307/416

  Reflective · CPC title

• B32B7/12

  using interposed adhesives or interposed materials with bonding properties · CPC title