Title:
GLASS PLATE, VEHICULAR WINDOW GLASS, AND LAMINATED GLASS
Document Type and Number:
WIPO Patent Application WO/2023/074637
Kind Code:
A1
Abstract:
The present invention pertains to a glass plate that has a first surface and a second surface opposite the first surface. When Vickers indenter indentation using a force of 5 [N] is performed on the first surface or the second surface, no cracks occur, or c/l < 0.50 is satisfied when the average length of cracks occurring in the first surface or the second surface as viewed from above is defined as c [mm] and the average length of the halves of the diagonals of indentation marks is defined as l [mm]. A predetermined relationship is satisfied among: a fracture toughness value KIC; a crack length a; a Young's modulus E; an average thermal expansion coefficient α at 20-300°C; and a temperature difference ΔT between the temperature TS1 on the first surface and the temperature TS2 on the second surface.
Inventors:
SAWAMURA SHIGEKI (JP)
KAJIHARA TAKATO (JP)
KAJIHARA TAKATO (JP)
Application Number:
PCT/JP2022/039575
Publication Date:
May 04, 2023
Filing Date:
October 24, 2022
Export Citation:
Assignee:
AGC INC (JP)
International Classes:
C03C3/089; B32B17/06; B60J1/00; C03B27/04; C03C3/078; C03C3/083; C03C3/087; C03C3/091; C03C27/12
Foreign References:
| JP2003508325A | 2003-03-04 | |||
| JP2020097506A | 2020-06-25 | |||
| JP2000143280A | 2000-05-23 | |||
| JP2020040869A | 2020-03-19 |
Attorney, Agent or Firm:
EIKOH PATENT FIRM, P.C. (JP)
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