GLASS SHEET MANUFACTURING METHOD AND GLASS SHEET

• Main Authors: MITANI, Kazuishi, TANAKA, Satoshi, KOYO, Hirotaka, SAITO, Yasuhiro, TSURI, Keiko
• Format: Patent
• Language: English; French; German
• Published: 21.06.2017
• Subjects: CHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUSENAMELS; CHEMISTRY; GLASS; JOINING GLASS TO GLASS OR OTHER MATERIALS; MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES; METALLURGY; MINERAL OR SLAG WOOL; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS,MINERALS OR SLAGS; SURFACE TREATMENT OF GLASS

The glass sheet production method of the present invention is a method for producing a surface-modified glass sheet. This method includes a gas contact step of bringing hydrogen fluoride (HF) gas and hydrogen chloride (Cl) gas into contact with at least one principal surface of a glass sheet having a temperature in a range of 450°C to 630°C. A gas containing the hydrogen fluoride (HF) gas is used in the gas contact step, and in the gas containing the hydrogen fluoride (HF) gas, a volume ratio of water vapor to the hydrogen fluoride (HF) gas (volume of water vapor / volume of HF gas) is less than 8.