Processes for thermal strengthening of glass using liquid conduction
AssigneeCornining Nincorporated
InventorsJohn Christopher THOMAS, Kevin Lee WASSON
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Abstract
A process of strengthening a glass sheet by cooling a sheet or portion of a sheet, the sheet comprising or consisting of a glass having a glass transition temperature, given in units of ° C., of T, wherein the cooling is performed starting with the sheet at a temperature above T, with more than 20%, 30%, 40% or 50% or more of said cooling, at some point during said cooling, being by thermal conduction through a liquid to a heat sink surface comprising a solid.
Claims25
Process of strengthening a glass sheet, the process comprising:
- a. supporting at least a portion of a glass sheet on a first surface thereof, at least in part, by a flow or a pressure of a liquid delivered to a first gap between the first surface and a first heat sink surface, the first heat sink surface comprising a solid, wherein the sheet comprises or consists of a glass having a glass transition temperature and the sheet is at a temperature greater than the glass transition temperature of the glass;
- b. cooling the first surface of the sheet, with more than 20% of said cooling being by thermal conduction from the first surface of the sheet across the first gap through the liquid to the first heat sink surface.
A process of strengthening a glass sheet, the process comprising:
- cooling a sheet or portion of a sheet, the sheet comprising or consisting of a glass having a glass transition temperature, given in units of ° C., of T, wherein the cooling is performed (a) starting with the sheet at a temperature above T, (b) with more than 20% of said cooling, at some point during said cooling, being by thermal conduction through a liquid to a heat sink surface comprising a solid.
A process for heat treating an article, the process comprising:
- heating or cooling an article, at least 50% of said heating or cooling performed, during at least some time of said heating or cooling, by thermal conduction through a liquid to a heat sink surface comprising a solid.
Dependencies are inferred from the claim text.