Methods for strengthening the edge of laminated glass articles and laminated glass articles formed therefrom
First Claim
1. A method for strengthening an edge of a glass laminate, the method comprising:
- positioning a glass filler material in a channel in the edge of the glass laminate, the glass laminate comprising a glass core layer positioned between a first glass clad layer and a second glass clad layer, sidewalls of the channel being formed from at least a portion of the first glass clad layer and at least a portion of the second glass clad layer, the glass filler material having a filler coefficient of thermal expansion CTEF that is greater than a core coefficient of thermal expansion CTEC of the glass core layer;
heating the glass filler material and the sidewalls of the channel to a temperature greater than or equal to a softening temperature of the glass filler material and greater than or equal to a softening temperature of the sidewalls; and
enclosing the glass filler material in the channel by joining the sidewalls and fusing at least a portion of the first glass clad layer to at least a portion of the second glass clad layer thereby forming an edge cap over the channel, wherein the edge cap is under compressive stress.
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Accused Products
Abstract
A method for strengthening an edge of a glass laminate including a glass core layer positioned between a first glass clad layer and a second glass clad layer may include forming a channel in the edge of the glass laminate. Sidewalls of the channel may be formed from the first glass clad layer and the second glass clad layer. Glass filler material having a filler coefficient of thermal expansion greater than a core coefficient of thermal expansion may be positioned in the channel. The glass filler material and the sidewalls of the channel may be fused to the second glass clad layer thereby forming an edge cap over the channel. The edge of the glass laminate is under compressive stress after the glass filler material is enclosed in the channel.
14 Citations
18 Claims
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1. A method for strengthening an edge of a glass laminate, the method comprising:
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positioning a glass filler material in a channel in the edge of the glass laminate, the glass laminate comprising a glass core layer positioned between a first glass clad layer and a second glass clad layer, sidewalls of the channel being formed from at least a portion of the first glass clad layer and at least a portion of the second glass clad layer, the glass filler material having a filler coefficient of thermal expansion CTEF that is greater than a core coefficient of thermal expansion CTEC of the glass core layer; heating the glass filler material and the sidewalls of the channel to a temperature greater than or equal to a softening temperature of the glass filler material and greater than or equal to a softening temperature of the sidewalls; and enclosing the glass filler material in the channel by joining the sidewalls and fusing at least a portion of the first glass clad layer to at least a portion of the second glass clad layer thereby forming an edge cap over the channel, wherein the edge cap is under compressive stress. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A laminated glass article comprising:
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a glass core layer having a core coefficient of thermal expansion CTEC; a first glass clad layer fused directly to a first surface of the glass core layer; a second glass clad layer fused directly to a second surface of the glass core layer opposite the first surface, the first glass clad layer and the second glass clad layer fused to one another adjacent an edge of the glass core layer forming an edge cap that encloses at least a portion of the edge of the glass core layer; and a glass filler material having a filler coefficient of thermal expansion CTEF and positioned between the edge of the glass core layer and the edge cap, the glass filler material fused to the glass core layer and the edge cap, wherein CTEF>
CTEC. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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Specification