Curved bullet proof glass made of glass, glass-ceramic or ceramic mechanically curved on the strike-face layer
A curved bullet-proof composite comprising: a glass or glass-ceramic external strike-face layer having been subjected to an ion exchange process and which is mechanically curved; at least one glass or glass-ceramic intermediate layer; an internal plastic layer; and an adhesive material between the strike-face layer, the at least one intermediate layer and the internal plastic layer.
1. A curved bullet-proof composite comprising:
a. one or more Alkali Aluminosilicate or Soda-Lime Silicate glass strike-face layers having been subjected to an ion exchange process to obtain enough flexibility to be mechanically curved, having a thickness less or equal to 3 mm;
b. one or more glass Borosilicate or Soda-Lime Silicate intermediate layers having a thickness ranging between 5 and 13 mm;
c. one or more internal plastic layers having a thickness ranging between 1 and 20 mm; and
d. one more adhesive layers between the strike-face layers, intermediate layers and internal plastic layers, having a thickness ranging from 0.3 and 3.1 mm;
wherein the glass strike-face layers and the intermediate layers are comprised by materials with different dilatometric softening points; and
wherein the curved bullet-proof composite complies with National Institute of Justice Standard NIJ 0108.01 level III A.
2. The composite of claim 1 , wherein the Alkali Aluminosilicate or the Soda-Lime acquire flexibility and mechanical resistance from the ion exchange process in order to be mechanically curved without breaking.
3. The composite of claim 1 , wherein the amount of Sodium Oxide Na 2 O) or any other Oxide which includes Sodium (Na) in its chemical formula may range between 0 and 30%.
4. The composite of claim 1 , wherein the amount of Lithium Oxide (LiO 2 ) or any other Oxide which includes Lithium (Li) in its chemical formula may range between 0 and 20%.
5. The composite of claim 1 , wherein the amount of Silicon Oxide (SiO 2 ) or any other Oxide which includes Silicon (Si) in its chemical formula may range between 0 and 50%.
6. The composite of claim 1 , wherein the amount of Boron Trioxide (B 2 O 3 ) or any other Oxide which includes Boron (B) in its chemical formula may range between 0 and 25%.
7. The composite of claim 1 , wherein the depth of layer reached during the ion exchange process in Sodium Aluminosilicate is greater or equal to 30 μm (≧: 30 μm) and compression stresses equal or greater than 300 Mpa (≧300 MPa).
8. The composite of claim 1 , wherein the depth of layer reached during the ion exchange process in Soda-Lime is greater or equal to 15 μm (≧15 μm) and compression stresses equal or greater than 200 Mpa (≧200 MPa).
9. The composite of claim 1 , wherein the depth of layer reached during the ion exchange process in Borosilicate is greater or equal to 5 μm (≧5 μm) and compression stresses equal or greater than 100 Mpa (≧100 MPa).
10. The composite of claim 1 , wherein the strike-face layers can be installed on a vehicle without need of making bodywork modification to the vehicle.
11. The composite of claim 1 wherein the glass layers have been subjected to an ion exchange process.
12. The composite of claim 1 , wherein the Alkali Aluminosilicate is selected from the group consisting of Lithium Aluminosilicate, Sodium Aluminosilicate, or any other Aluminosilicate from the alkaline material group.
13. The composite of claim 12 , wherein the depth of layer reached during the ion exchange process in Lithium Aluminosilicate is greater or equal to 50 μm (≧50 μm) and compression stresses equal or greater than 400 Mpa (≧400 MPa).