| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To aim the reduction of facility cost and the lowering of production cost by easily performing laminating work by simple equipment and simply dealing with the change of kinds when producing a reinforced glass plate by laminating a plurality of glass plates. <P>SOLUTION: A thick core plate glass 2a having a higher thermal expansion coefficient and a thin surface-layer plate glass 3a having a lower thermal expansion coefficient are laminated together, so that the laminated portion has a temperature equal to or higher than the lower softening point out of the softening points of the core plate glass 2a and the surface-layer plate glass 3a, thereby melt-bonding the core plate glass 2a and the surface-layer plate glass 3a; and then performing cooling so as to attain a temperature less than the lower strain point out of strain points of the core plate glass 2a and the surface-layer plate glass 3a, to thereby form a compression stress in a surface layer portion 3 corresponding to the surface-layer plate glass 3a and form a tensile stress in a core portion 2 corresponding to the core plate glass 2a. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
