Durable glass for vehicle
A multilayer glass stack for a vehicle windshield with improved durability is described. The multilayer glass stack includes an external-facing glass layer, an internal-facing glass layer, and an adhesive interlayer positioned between the external-facing and internal-facing glass layers. The external-facing glass layer may include borosilicate and/or does not include soda lime glass. Methods of manufacturing the multilayer glass stack are also described.
1. A method of manufacturing a multilayer glass stack, comprising:
forming an external-facing glass layer comprising borosilicate; and
adhering the external-facing glass layer to an internal-facing glass layer with an adhesive interlayer comprising an adhesive to form a multilayer glass stack;
wherein the multilayer glass stack comprises a viewing area comprising an optical distortion of at most 250 millidiopters, and
wherein the multilayer glass stack has at most a 10% chance of failure with an impact of 2 J.
2. The method of claim 1 , further comprising shaping the multiplayer glass stack to fit into a vehicle windshield frame, wherein the multilayer glass stack is a vehicle windshield.
3. The method of claim 2 , wherein the vehicle windshield is selected from the group consisting of a front windshield, a side windshield, a back windshield, a top windshield, and combinations thereof.
4. The method of claim 2 , wherein the vehicle windshield is shaped to comprise a curvilinear shape.
5. The method of claim 2 , wherein the vehicle windshield is configured to break into pieces which comply with a governmental safety guideline.
6. The method of claim 1 , wherein the multilayer glass stack comprises a viewing area comprising an optical distortion of at most about 200 millidiopters.
7. The method of claim 1 , wherein the multilayer glass stack has at most a 10% chance of failure with an impact of 2.5 J.
8. The method of claim 1 , wherein the multilayer glass stack has an area density of about 7.5 kg/m 2 to about 10 kg/m 2 .
9. The method of claim 1 , wherein forming the external-facing glass layer comprises shaping the external-facing glass layer to fit into a vehicle windshield frame, wherein the multilayer glass stack is a vehicle windshield.
10. The method of claim 1 , wherein the external-facing glass layer has at most a 10% chance of failure with an impact of 2 J.
11. The method of claim 1 , wherein the external-facing glass layer has a thickness of about 2 mm to about 5 mm.
12. The method of claim 1 , wherein the external-facing glass layer is an outermost layer of the multilayer glass stack.
13. The method of claim 1 , wherein the external-facing glass layer is shatter resistant or shatterproof.
14. The method of claim 1 , wherein the external-facing glass layer resistant to crack initiation and crack propagation.
15. The method of claim 1 , wherein the external-facing glass layer does not comprise soda lime glass.
16. The method of claim 1 , wherein the internal-facing glass layer comprises a material selected from the group consisting of aluminosilicate, tempered glass, and combinations thereof.
17. The method of claim 1 , wherein the internal-facing glass layer has a thickness of about 0.5 mm to about 1.1 mm.
18. The method of claim 1 , wherein the internal-facing glass layer is an outermost layer of the multilayer glass stack.
19. The method of claim 1 , wherein a thickness ratio of the external-facing glass layer:internal-facing glass layer is greater than 1:1.
20. The method of claim 19 , wherein the thickness ratio of the external-facing glass layer:internal-facing glass layer is greater than 1:1 to about 10:1.
21. The method of claim 1 , wherein the adhesive interlayer has energy absorptive properties.
22. The method of claim 1 , wherein the adhesive interlayer has a glass transition temperature of about 6° C. to about 10° C.
23. The method of claim 1 , wherein the adhesive interlayer comprises multiple layers.
24. The method of claim 1 , wherein the adhesive comprises a polyvinyl ether (PVE).
25. The method of claim 1 , wherein the multilayer glass stack further comprises at least one additional layer, wherein the at least one additional layer is selected from the group consisting of a light absorbing layer, a light reflecting layer, an acoustic dampening layer, and combinations thereof.
26. The method of claim 25 , wherein the at least one additional layer comprises a light absorbing layer, and the light absorbing layer comprises a tint material.
27. The method of claim 1 , wherein the multilayer glass stack further comprises an element selected from the group consisting of a camera, a sensor, a heating element, a waveguide, an incoupling optical element, an outcoupling optical element, a light injection device, and combinations thereof.
28. The method of claim 1 , further comprising positioning the multilayer glass stack into a vehicle frame of a vehicle.
29. The method of claim 28 , wherein the vehicle further comprises an electric motor.
30. The method of claim 28 , further comprising positioning a camera to face the internal-facing glass layer of the multilayer glass stack.
31. The method of claim 28 , wherein the camera is positioned to view through the viewing area.
32. The method of claim 1 , wherein the adhesive layer does not comprise a decoration.