Layered bendable puncture resistant glass article and method of making
A glass article having a first glass layer, a second glass layer disposed adjacent to the first glass layer, and an interface slidably coupling the first glass layer to the second glass layer. The interface has a thickness of from 2 nm to 500 nm. The glass article is characterized by: (a) an absence of failure when the article is held at a parallel plate separation distance of 10 mm for 60 minutes at 25° C. and 50% relative humidity; (b) a puncture resistance of greater than about 6 kgf when the second glass layer is supported by (i) a 50 μm thick pressure-sensitive adhesive having an elastic modulus of less than 1 GPa and (ii) an approximately 100 μm thick polyethylene terephthalate layer having an elastic modulus of less than 10 GPa, and the first glass layer is loaded with a tungsten carbide ball having a 1 mm diameter.
1. A glass article, comprising:
a first glass layer, wherein the first glass layer is from 100 microns to 125 microns thick;
a second glass layer disposed adjacent to the first glass layer; and
an interface slidably coupling the first glass layer to the second glass layer, the interface comprising a thickness of from 2 nm to 500 nm,
wherein the glass article is characterized by:
(a) an absence of failure when the article is held at a parallel plate separation distance of 10 mm for 60 minutes at 25° C. and 50% relative humidity; and
(b) a puncture resistance of greater than about 6 kgf when the second glass layer is supported by (i) an 50 μm thick pressure-sensitive adhesive having an elastic modulus of less than 1 GPa and (ii) an approximately 100 μm thick polyethylene terephthalate layer having an elastic modulus of less than 10 GPa, and the first glass layer is loaded with a tungsten carbide ball having a 1 mm diameter.
2. The glass article of claim 1 , further comprising an index of refraction matching material disposed in the interface.
3. The glass article of claim 1 , further comprising a coating on at least one of the first and second glass layers, the coating being disposed in the interface.
4. The glass article of claim 3 , wherein the coating on the at least one of the first and second glass layers comprises a polyimide material.
5. The glass article of claim 1 , wherein the second glass layer is from 10 microns to 125 microns thick.
6. The glass article of claim 1 , wherein the first glass layer has a larger thickness than the second glass layer.
7. The glass article of claim 1 , further comprising a hinge axis, and the first and second glass layers are fixed relative to one another at the hinge axis.
8. The glass article of claim 1 , further comprising a frame element disposed around the first and second glass layers.
9. The glass article of claim 1 , wherein the glass layers are chemically strengthened.