Method for forming a 2mm or less thick rolled glass

By using a two-step method to produce solar rolled glass with a thickness of less than 2mm, the problem of thickness control has been solved, the transmittance and mechanical properties of the glass have been improved, costs and carbon emissions have been reduced, and the service life of the rolling rolls has been extended.

CN117720258BActive Publication Date: 2026-08-18CHINA LUOYANG FLOAT GLASS GROUP
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Patent Information

Application Number
CN202311662035.7
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-12-06
Publication Date
2026-08-18
Estimated Expiration
2043-12-06

AI Technical Summary

Technical Problem

Existing technologies make it difficult to produce solar rolled glass with a thickness of less than 2mm. Thickness control is challenging, and defects are easily generated during the forming process, affecting the glass's transmittance and mechanical properties.

Method used

The two-step method for producing rolled glass with a thickness of less than 2mm involves first gradually cooling the molten glass in a sealed container and drawing it into a viscoelastic glass strip, and then extruding and cooling it between the upper and lower rolling rollers to finally form rolled glass of the required thickness.

Benefits of technology

It has enabled the production of solar rolled glass with a thickness of less than 2mm, which improves the glass's transmittance and mechanical properties, reduces the weight of the components, lowers costs and carbon emissions, and extends the service life of the rolling rolls.

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Abstract

The application provides a method for forming a calendered glass with a thickness of less than 2mm, and belongs to the technical field of calendering of glass. The method comprises the following steps: flowing a glass melt with a viscosity of less than 10 4 Pa·s into a closed container containing a metal liquid; when the viscosity of the glass melt increases to 10 5.3 -10 5.8 Pa·s, the glass melt is formed into a viscoelastic glass ribbon with a certain width and a thickness of H1 by horizontal drawing, and H1<4mm; when the viscosity of the viscoelastic glass ribbon increases to 10 5.8 -10 6.3 Pa·s, the viscoelastic glass ribbon is introduced between an upper calendering roller and a lower calendering roller through a guide roller; after being drawn and extruded by the upper calendering roller and the lower calendering roller, the viscosity of the viscoelastic glass ribbon is greater than 10 6.8 Pa·s, the thickness is H2, H1>H2, and H2≤2mm; and the viscoelastic glass ribbon is annealed and cooled to obtain a product. The method is used for producing calendered glass with a thickness of less than 2mm.
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