Laminated glass pane with IR-reflecting properties

• US 5,932,329 A
• Filed: 08/16/1996
• Issued: 08/03/1999
• Est. Priority Date: 08/16/1995
• Status: Expired due to Fees

• Current Assignee: Saint-Gobain Vitrage
• Original Assignee: Saint-Gobain Vitrage
• Inventors: Jansen, Manfred, Schilde, Heinz, Frost, Thorsten
• Primary Examiner(s): NAKARANI, DHIRAJLAL S
• Application Number:
  US08/698,738
• Time in Patent Office: 1,082 Days
• Field of Search: 428/213, 428/214, 428/215, 428/425.6, 428/436, 428/437, 428/216
• US Class Current: 428/214
• CPC Class Codes: B32B 17/10005 laminated safety glass or glazing
• CPC Class Codes: B32B 17/10036 comprising two outer glass sheets
• CPC Class Codes: B32B 17/10174 Coatings of a metallic or dielectric material on a constituent layer of glass or polymer
• CPC Class Codes: B32B 17/10761 containing vinyl acetal
• CPC Class Codes: B32B 17/1077 containing polyurethane
• CPC Class Codes: B32B 2367/00 Polyesters, e.g. PET, i.e. polyethylene terephthalate
• CPC Class Codes: Y10T 428/24959 of adhesive layers
• CPC Class Codes: Y10T 428/24967 Absolute thicknesses specified
• CPC Class Codes: Y10T 428/31601 Quartz or glass
• CPC Class Codes: Y10T 428/31627 Next to aldehyde or ketone condensation product
• CPC Class Codes: Y10T 428/3163 Next to acetal of polymerized unsaturated alcohol [e.g., formal butyral, etc.]

Abstract

In a laminated glass pane comprising two glass sheets (1, 2) and a transparent support film (4) having an infra red reflecting surface coating (3), connected to the two glass sheets (1, 2) by adhesive layers (5, 6), the first adhesive layer (5) has a thickness of at most about 50 μm. The second adhesive layer (6) preferably has a thickness of 0.76 mm.

Claims

1. A laminated glass pane, comprising:

a) two glass sheets;

b) a transparent support film of a tear-resistant polymer provided with an IR-reflecting surface coating; and

c) first and second adhesive layers disposed on opposing surfaces of the coated support film;

wherein the two glass sheets have disposed between them the coated support film and the first and second adhesive layers, and the coated support film is bonded to the two glass sheets by the first and second adhesive layers; and

wherein the first adhesive layer has a thickness of at most 50 μ

m, and said IR-reflecting layer is deposited on the face of said support film in contact with said second adhesive layer.

2. The laminated glass pane of claim 1, wherein the first adhesive layer has a thickness of 1 to 30 μ

m.

3. The laminated glass pane of claim 1, wherein the first adhesive layer has a thickness of 5 to 10 μ

m.

4. The laminated glass pane of claim 1, wherein the first adhesive layer has a thickness of 10 μ

m.

5. The laminated glass pane of claim 1, wherein the second adhesive layer has a thickness of 0.3 to 0.8 mm.

6. The laminated glass pane of claim 1, wherein the second adhesive layer has a thickness of 0.76 mm.

7. The laminated glass pane of claim 1, wherein the first and second adhesive layers comprise a thermoplastic polymer.

8. The laminated glass pane of claim 7, wherein the thermoplastic polymer is polyvinyl butyral or polyurethane.

9. The laminated glass pane of claim 1, wherein the support film comprises polyethylene terephthalate.

10. The laminated glass pane of claim 1, wherein the IR-reflecting layer comprises multiple layers, wherein one of the layers comprises silver.

11. The laminated glass pane of claim 10, wherein the multiple layers are produced by cathodic sputtering.