FLOAT GLASS RIBBON, FLOAT GLASS PLATE AND METHOD FOR MANUFACTURING FLOAT GLASS PLATE

• Main Author: SHIRAISHI YOSHIHIRO
• Format: Patent
• Language: English; Japanese
• Published: 08.09.2016
• Subjects: CHEMISTRY; GLASS; MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES; METALLURGY; MINERAL OR SLAG WOOL

PROBLEM TO BE SOLVED: To provide a float glass ribbon capable of suppressing wavy deformation in the molding step, and a method for manufacturing a float glass plate.SOLUTION: A float glass ribbon 14 has 800 mm or more of a width and 0.25 mm or less of an average plate thickness in an intermediate region between a position separated by 400 mm on the inner side in the width direction from one end in the width direction and a position separated by 400 mm on the inner side in the width direction from the other end in the width direction. The plate thickness distribution in the width direction satisfies the following formulae. T0≥T1, T0≥T2, T0; a plate thickness at the center in the width direction in the intermediate region, T1; the minimum plate thickness in a first region having a distance within 0.4×W on the inner side in the width direction from one end in the width direction in the intermediate region, T2; the minimum plate thickness of a second region having a distance within 0.4×W on the inner side in the width direction from the other end in the width direction in the intermediate region and W; the width of the intermediate region.SELECTED DRAWING: Figure 2 【課題】成形工程における波状の変形を抑制したフロートガラスリボン及びフロートガラス板の製造方法を提供する。【解決手段】幅が８００ｍｍ以上であり、幅方向一端から幅方向内側に４００ｍｍ離れた位置と、幅方向他端から幅方向内側に４００ｍｍ離れた位置との間の中間領域の平均板厚が０．２５ｍｍ以下であるフロートガラスリボン１４であって、幅方向における板厚分布が下記の式を満たす、フロートガラスリボン１４。Ｔ０≧Ｔ１、Ｔ０≧Ｔ２、Ｔ０；前記中間領域の幅方向中心の板厚，Ｔ１；前記中間領域の幅方向一端から幅方向内側に０．４×Ｗ以内の距離の第１領域の最小板厚、Ｔ２；前記中間領域の幅方向他端から幅方向内側に０．４×Ｗ以内の距離の第２領域の最小板厚，Ｗ；前記中間領域の幅【選択図】図２