Glass interleaving material and method

• US 20050260342A1
• Filed: 05/25/2004
• Published: 11/24/2005
• Est. Priority Date: 05/18/2004
• Status: Active Grant

• Current Assignee: Guardian Glass LLC (KOCH Industries Incorporated)
• Original Assignee: Guardian Industries Corporation (KOCH Industries Incorporated)
• Inventors: Bohland, John R.
• Granted Patent: US 7,108,889 B2
• Time in Patent Office: Days
• US Class Current: 427/154
• CPC Class Codes: B32B 17/06 comprising glass as the main or only constituent of a layer, next to another layer of a specific material
• CPC Class Codes: B32B 3/14 characterised by a face layer formed of separate pieces of material which are juxtaposed side-by-side B32B5/02 takes precedence
• CPC Class Codes: B32B 7/12 using interposed adhesives or interposed materials with bonding properties
• CPC Class Codes: B65G 49/069 Means for avoiding damage to stacked plate glass, e.g. by interposing paper or powder spacers in the stack maculation per se B65H39/00
• CPC Class Codes: Y10T 428/2998 including synthetic resin or polymer
• CPC Class Codes: Y10T 428/3154 Of fluorinated addition polymer from unsaturated monomers
• CPC Class Codes: Y10T 428/31544 Addition polymer is perhalogenated
• CPC Class Codes: Y10T 428/31645 Next to addition polymer from unsaturated monomers
• CPC Class Codes: Y10T 428/31649 Ester, halide or nitrile of addition polymer
• CPC Class Codes: Y10T 428/31678 Of metal

Abstract

There is provided a technique for interleaving glass sheets (which may or may not be provided with low-E coatings thereon) during shipment, transport, storage, and/or the like. In certain example embodiments, the glass sheet interleaving material includes a mixture of: polymer inclusive beads or particles of material such as polymethymethacrylate, and a stearate such as an acid stearate or the metal salt of an acid stearate. The interleaving material mixture may be applied to the glass sheets in any suitable manner.

Claims

1. A method of spacing glass sheets from one another during stacking of the glass sheets, the method comprising:

providing an interleaving material between adjacent glass sheets; and

using a mixture comprising each of (a) polymer inclusive beads or particles, and (b) stearate material, for the interleaving material between the adjacent glass substrates.

2. The method of claim 1, wherein the stearate material comprises an acid stearate.

3. The method of claim 1, wherein the stearate material comprises a metal salt of an acid stearate.

4. The method of claim 1, wherein the stearate material comprises at least one alkaline earth metal.

5. The method of claim 1, wherein the stearate material comprises calcium stearate.

6. The method of claim 1, wherein the polymer inclusive beads or particles comprise polymethymethacrylate.

7. The method of claim 1, wherein the polymer inclusive beads or particles comprise at least one of:

polymethymethacrylate, polyethylene, polystyrene, methacrylate polyester, polytetrafluoroethylene.

8. The method of claim 1, wherein the stearate adheres to each of the glass sheets and the polymer inclusive beads or particles, thereby improving adherence of the polymer inclusive beads or particles to the glass sheets.

9. The method of claim 1, wherein at least one of the glass sheets comprises a low-E coating supported by a glass substrate.

10. The method of claim 9, wherein the low-E coating comprises at least one layer comprising silver sandwiched between at least first and second dielectric layers.

11. The method of claim 1, wherein from 0.5 to 10% of the mixture for the interleaving material is of the stearate material.

12. The method of claim 1, wherein from 0.5 to 5% of the mixture for the interleaving material is of the stearate material.

13. The method of claim 1, wherein the stearate material comprises a salt of C₁₈H₃₆O₂.

30. The method of claim 1, wherein the stearate material comprises Ca(C₁₈H₃₅O₂)₂.

14. Interleaving material for location between adjacent stacked glass sheets, the interleaving material comprising each of (a) polymer inclusive beads or particles, and (b) stearate inclusive material, for location between glass sheets.

15. The interleaving material of claim 14, wherein the stearate inclusive material comprises an acid stearate.

16. The interleaving material of claim 14, wherein the stearate inclusive material comprises a metal salt of an acid stearate.

17. The interleaving material of claim 14, wherein the stearate inclusive material comprises at least one alkaline earth metal.

18. The interleaving material of claim 14, wherein the stearate inclusive material comprises calcium stearate.

19. The interleaving material of claim 14, wherein the polymer inclusive beads or particles comprise polymethymethacrylate.

20. The interleaving material of claim 14, wherein the polymer inclusive beads or particles comprise at least one of:

polymethymethacrylate, polyethylene, polystyrene, methacrylate polyester, polytetrafluoroethylene.

21. The interleaving material of claim 14, wherein the stearate inclusive material is for adhering to each of the glass sheets and the polymer inclusive beads or particles, thereby for improving adherence of the polymer inclusive beads or particles to the glass sheets.

22. The interleaving material of claim 14, wherein from 0.5 to 10% of the mixture for the interleaving material is of the stearate inclusive material.

23. The interleaving material of claim 14, wherein from 0.5 to 5% of the mixture for the interleaving material is of the stearate material.

24. The interleaving material of claim 14, wherein the stearate inclusive material comprises a salt and/or ester of C₁₈H₃₆O₂.

31. The interleaving material of claim 14, wherein the stearate inclusive material comprises Ca(C₁₈H₃₅O₂)₂.

25. A combination of stacked glass sheets and interleaving material provided between the stacked glass sheets, comprising:

the interleaving material being located between adjacent stacked glass sheets, and the interleaving material comprising each of (a) polymer inclusive beads or particles, and (b) a salt of C₁₈H₃₆O₂.

26. The combination of claim 25, wherein at least one of the glass sheets comprises a low-E coating supported by a glass substrate.

27. The combination of claim 25, wherein the low-E coating comprises at least one layer comprising silver sandwiched between at least first and second dielectric layers.

28. The combination of claim 25, wherein the salt of C₁₈H₃₆O₂ comprises an alkaline metal inclusive stearate.

29. The combination of claim 25, wherein (b) is a metal-salt of C₁₈H₃₆O₂.

32. A method of spacing glass sheets from one another during stacking of the glass sheets, the method comprising:

providing an interleaving material between adjacent glass sheets; and

using a mixture comprising each of (a) polymer inclusive beads or particles, and (b) palmitic acid, and/or a metal salt inclusive derivative thereof, for the interleaving material between the adjacent glass substrates.

33. The method of claim 32, wherein from 0.5 to 5% of the mixture for the interleaving material is of the palmitic acid and/or a metal salt inclusive derivative thereof.

34. A method of spacing glass sheets from one another during stacking of the glass sheets, the method comprising:

providing an interleaving material between adjacent glass sheets; and

using a mixture comprising each of (a) polymer inclusive beads or particles, and (b) tallow fatty acid(s) and/or a metal salt inclusive derivative(s) thereof, for the interleaving material between the adjacent glass substrates.

35. The method of claim 34, wherein from 0.5 to 5% of the mixture for the interleaving material is of the tallow fatty acid(s) and/or a metal salt inclusive derivative(s) thereof.

36. Interleaving material for location between adjacent stacked glass sheets, the interleaving material comprising each of (a) polymer inclusive beads or particles, and (b) powder or flakes comprising tallow fatty acid(s) and/or a metal salt inclusive derivative(s) thereof.

37. The interleaving material of claim 36, wherein the interleaving material consists essentially of (a) and (b).