Laminate comprising a glass layer having crack lines

• US 6,306,510 B1
• Filed: 06/29/1999
• Issued: 10/23/2001
• Est. Priority Date: 07/15/1998
• Status: Expired due to Term

• Current Assignee: InnoLux Corporation
• Original Assignee: Agfa-Gevaert N.V.
• Inventors: Verlinden, Bartholomeus, Tahon, Jean-Pierre, Vermeulen, Leo
• Primary Examiner(s): Jones, Deborah
• Assistant Examiner(s): Bahta, Abraham
• Application Number:
  US09/342,104
• Time in Patent Office: 847 Days
• Field of Search: 428/46, 428/47, 428/48, 428/49, 428/426, 428/428, 428/432, 428/433, 428/438, 428/410
• US Class Current: 428/426
• CPC Class Codes: B32B 17/10036 comprising two outer glass sheets
• CPC Class Codes: B32B 17/10247 Laminated safety glass or glazing containing decorations or patterns for aesthetic reasons containing metal wires for aesthetic reasons B32B17/10422
• CPC Class Codes: B32B 17/1033 Laminated safety glass or glazing containing temporary protective coatings or layers
• CPC Class Codes: B32B 17/10981 Pre-treatment of the layers
• CPC Class Codes: G06K 19/02 characterised by the selection of materials, e.g. to avoid wear during transport through the machine
• CPC Class Codes: G06K 19/06009 with optically detectable marking G06K19/063, G06K19/08 take precedence
• CPC Class Codes: G06K 19/06046 Constructional details
• CPC Class Codes: G06K 19/14 the marking being sensed by radiation
• CPC Class Codes: Y10T 428/162 Transparent or translucent layer or section
• CPC Class Codes: Y10T 428/164 Continuous two dimensionally sectional layer
• CPC Class Codes: Y10T 428/315 Surface modified glass [e.g., tempered, strengthened, etc.]

Abstract

A laminate including a glass layer and a second layer, the glass layer having a pattern of crack lines, dividing the glass layer into pattern elements.

Claims

1. A flexible laminate comprising a first layer and a second layer, the first layer being a glass layer having crack lines, a set of the crack lines forming a pattern, the crack lines enclosing a pattern element and the pattern element having a pattern element size equal to the square root of the ratio of the area of the pattern element and π

.

2. The laminate according to claim 1, wherein the crack lines have a depth that is equal to the glass layer thickness.

3. The laminate according to claim 1 wherein the glass layer has a thickness not higher than 1.2 mm and the second layer is selected from the group consisting of paper, metal and an organic resin.

4. The laminate according to claim 2 wherein the glass layer has a thickness not higher than 1.2 mm and the second layer is selected from the group consisting of paper, metal and an organic resin.

5. The laminate according to claim 1, further comprising a third layer selected from the group consisting of paper, metal and an organic resin.

6. The laminate according to claim 1, further comprising a second glass layer.

7. The laminate according to claim 6 wherein said second glass layer has crack lines.

8. The laminate according to claim 1, further comprising a functional layer, for making a photomask.

9. The laminate according to claim 1, wherein the first layer has a failure stress under tensile stress higher than 1×

10⁷ Pa.

10. The laminate according to claim 1, wherein the first layer has an elasticity modulus lower than 1×

10¹¹ Pa.

11. The laminate according to claim 1, wherein the first layer has a thickness lower than 0.5 mm.

12. The laminate according to claim 1, wherein the first layer has a thickness lower than 120 μ

m.

13. The laminate according to claim 1, wherein the first layer comprises a number of portions having crack lines and a number of portions having no crack lines.

14. The laminate according to claim 13, wherein the laminate has a maximum element size which is a maximum pattern element size of the portions of the glass layer having crack lines and is smaller than 5 mm.

15. The laminate according to claim 13, wherein the laminate has a maximum element size which is a maximum pattern element size of the portions of the glass layer having crack lines and is smaller than 1 mm.

16. The laminate according to claim 13, wherein the laminate has a maximum element size which is a maximum element size of the portions of the glass layer having crack lines and is smaller than 0.5 mm.

17. The laminate according to claim 1, wherein at least one pattern element is selected from the group consisting of an arbitrary pattern, a hexagon, square, a cross, a triangle, an octahedron, a diamond, a rectangle, an arbitrary shape, and a four-sided shape with curved sides and broken lines.

18. The laminate according to claim 1, wherein at least one pattern is selected from the group consisting of an arbitrary pattern, a diamond pattern, an octagon pattern, a hexagonal pattern, a rectangular pattern, a brick-like pattern and a triangular pattern.