COMPOSITE GLASS PANE HAVING CHAMFERED THROUGH-HOLE

Abstract

A composite glass pane with at least one through-hole, includes a first pane, a second pane, and at least one polymer intermediate layer between the first and second pane, wherein the through-hole is formed by a hole in the first pane, a hole in the polymer intermediate layer, and a hole in the second pane, wherein the hole in the first pane is a chamfered hole having a chamfer in each case on both sides of the first pane, and the hole in the second pane is a chamfered hole having a chamfer in each case on both sides of the second pane.

Claims

1. A composite glass pane with at least one through-hole, comprising a first pane, a second pane, and at least one polymer intermediate layer between the first and second pane, wherein the through-hole is formed by a hole in the first pane, a hole in the polymer intermediate layer, and a hole in the second pane, wherein the hole in the first pane is a chamfered hole having a chamfer in each case on both sides of the first pane, and the hole in the second pane is a chamfered hole having a chamfer in each case on both sides of the second pane.

2. The composite glass pane according to claim 1, wherein the chamfers have an angle in the range from 35 to 55.

3. The composite glass pane according to claim 1, wherein the chamfers have a height h in the range from 0.1 to 1 mm.

4. The composite glass pane according to claim 1, wherein the first pane and the second pane are made of partially tempered glass.

5. The composite glass pane according to claim 1, wherein the edge compressive stress at the through-hole is greater than 10 MPa.

6. The composite glass pane according to claim 1, wherein the surface compressive stress of the first pane and the surface compressive stress of the second pane is greater than 20 MPa.

7. The composite glass pane according to claim 1, wherein the size of shell chipping, if present, at the edge of the chamfers is less than 1000 m.

8. The composite glass pane according to claim 1, wherein the shortest distance k from an edge of the composite glass pane to the perimeter of the at least one through-hole is at least 5 mm and/or at most 40 mm.

9. The composite glass pane according to claim 1, wherein the at least one through-hole has a diameter in the range from 5 to 100 mm.

10. The composite glass pane according to claim 1, wherein the first pane and/or the second pane have, independently of one another, a thickness in the range from 0.3 to 10 mm.

11. The composite glass pane according to claim 1, wherein the first pane and/or the second pane is made of inorganic glass and/or organic glass.

12. The composite glass pane according to claim 1, wherein the at least one through-hole is one, two, three, or four through-holes, wherein each through-hole is formed in each case by a chamfered hole in the first pane, a hole in the at least one polymer intermediate layer, and a chamfered hole in the second pane.

13. The composite glass pane according to claim 1, wherein the composite glass pane is a curved composite glass pane.

14. A method comprising utilizing a composite glass pane according to claim 1 as a window pane for buildings or as a vehicle window.

15. A method for producing a composite glass pane according to claim 1, comprising: a) providing a first pane having at least one chamfered hole that has a chamfer in each case on both sides of the pane, a second pane with at least one chamfered hole that has a chamfer in each case on both sides of the pane, and at least one polymer intermediate layer with at least one hole, b) arranging the at least one polymer intermediate layer between the first pane and the second pane, wherein the at least one chamfered hole of the first pane, the at least one chamfered hole of the second pane, and the hole of the at least one polymer intermediate layer are positioned such that they form at least one through-hole in the assembly formed; and c) joining the first pane to the second pane by means of the at least one polymer intermediate layer by lamination.

16. The composite glass pane according to claim 3, wherein the chamfers have a height h in the range from 0.3 to 0.8 mm.

17. The composite glass pane according to claim 5, wherein the edge compressive stress at the through-hole is greater than 20 MPa.

18. The composite glass pane according to claim 6, wherein the surface compressive stress of the first pane and the surface compressive stress of the second pane is greater than 30 MPa.

19. The composite glass pane according to claim 7, wherein the size of shell chipping, if present, at the edge of the chamfers is less than 500 m.

20. The composite glass pane according to claim 9, wherein the at least one through-hole has a diameter in the range from 10 to 30 mm.

Description

[0071] The invention is explained in detail in the following based on nonrestrictive exemplary embodiments with reference to the accompanying drawings.

[0072] They depict:

[0073] FIG. 1 a first pane 1 with two chamfered holes 5, a second pane 2 with two chamfered holes 7, and a polymer intermediate layer 3 with two holes 6;

[0074] FIG. 2 an exploded view of an embodiment of a composite glass pane according to the invention formed from the components depicted in FIG. 1;

[0075] FIG. 3 the composite glass pane according to the invention of FIG. 2 with two through-holes 4;

[0076] FIG. 4 a perspective detail of the composite glass pane of Fig.2, showing a through-hole 4 and its shortest distance to the edge of the composite glass pane zeigt;

[0077] FIG. 5 schematically, a detail of a chamfered hole of a pane (first pane or second pane) in cross-section, wherein only one side of the hole is depicted. The chamfered hole has, in each case, a chamfer on both sides of the pane (upper and lower side of the pane). The principle sketch shows the chamfer angle (for the upper chamfer) and the chamfer height h (for the lower chamfer).

[0078] FIG. 6 a side view of the through-hole 4 of the composite glass pane according to the invention, wherein both the chamfered hole 5 of the first pane 1 and the chamfered hole 7 of the second pane 2 have, in each case, two chamfers, one in the direction of the surroundings and one in the direction of the polymer intermediate layer 3.

[0079] It is understood that the specific shape of the composite glass pane depicted in the figures is only for illustration and that the invention is not restricted to the shapes shown.

EXAMPLE

[0080] A pane, as schematically depicted in FIG. 1-6, was produced. A curved pane was produced (not shown in the figures). The curved composite glass pane formed had the following characteristics:

[0081] First pane: partially tempered glass with a thickness of 2.1 mm,

[0082] Polymer film: PVB film with a thickness of 0.76 mm,

[0083] Second pane: partially tempered glass with a thickness of 1.6 mm,

[0084] Through-holes: Number: 2, Diameter: 14.5 mm, Shortest distance to the pane edge: 21.75 mm [0085] Chamfer parameters: Chamfer angle in each case 45, Chamfer height in each case 0.5 mm.

[0086] The not yet partially tempered first pane and second pane were provided with the chamfered holes. Then, the first and second pane were bent together into the desired shape by gravity bending. The panes were then subjected to a thermal tempering process.

[0087] Then, the panes were stacked with PVB film into which the suitable holes were punched. The pair of panes with interposed PVB film is then pre-bonded, for example, by a calendar roll or other deaeration method and then finally bonded in the autoclave by autoclaving.

[0088] By means of the present invention, in which panes having chamfered holes are used, it is possible to reduce the percentage of breakage during production of the composite glass pane compared to the production of a similar composite glass pane with a conventional through-hole without chamfers by as much as 20-50%.

LIST OF REFERENCE CHARACTERS

[0089] 1 first pane [0090] 2 second pane [0091] 3 polymer intermediate layer or film [0092] 4 through-hole [0093] 5 chamfered hole of the first pane [0094] 6 hole of the polymer intermediate layer or film [0095] 7 chamfered hole of the second pane [0096] chamfer angle [0097] h chamfer height [0098] k shortest distance from the composite glass pane edge to the perimeter of the through-hole