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US 2021/0061698 A1Published application
Method for strengthening and bending glass sheets
AssigneeAGP America S.A.
InventorsMario Arturo MANNHEIM ASTETE, Ivan Arturo CORNEJO, Mauricio Fernando CORNEJO POL
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Abstract
Method for strengthening and bending glass sheets, wherein a saturated saline solution is applied to glass sheets, followed by a rapid temperature change, allowing the salt to 5 precipitate. The glass sheets are then evenly coated with a recrystallized salt. Subsequently, the glass sheets are ion exchanged and bent at a predetermined temperature for a predetermined period of time.
Claims16
A method for strengthening a glass sheet while bending thereof, comprising the steps of:
- applying a saturated solution at temperature T1 on the glass sheet at temperature T2, wherein the saturated solution contains an ionic salt and a liquid solvent, and wherein T1>T2;
- allowing the solution on the glass sheet to cool, thereby precipitating the ionic salt as soon as the solution temperature decrease, leaving a crust of salt adhered to the surface of the glass sheet;
- heating the glass sheet at a predetermined temperature T3 for a predetermined period of time t3 for bending it by a bending process, wherein the temperature T3 ranges from the temperature at which the viscosity of the glass sheet is 1014.6 poises to the temperature at which the viscosity of the glass sheet is 107.6 poises, and the time t3 is enough to impart a selected permanent curvature to the glass sheet;
- and
- cooling the glass sheet.
2 more elements
Dependencies are inferred from the claim text.