Glass article

Patent metadata

Field	Value
Publication number	US-11299420-B2
Application number	US-201916361959-A
Country	US
Kind code	B2
Filing date	Mar 22, 2019
Priority date	Mar 23, 2018
Publication date	Apr 12, 2022
Grant date	Apr 12, 2022

Abstract

A glass article including a first main surface, a second main surface, and an end face, in which: the glass article includes an antiglare layer on the first main surface side; the antiglare layer has a glass transition point Tg of equal to or less than a glass transition point Tg0 of the glass article at a center portion in a cross section along a thickness direction; and the first main surface has a protrusion diameter y (μm) that satisfies the relation (1) with respect to a 60° specular gloss (gloss value) x (%) of the first main surface, y>−0.0245x+3.65 (1).

First claim

What is claimed is:

1. A glass article comprising a first main surface, a second main surface, and an end face, wherein:
the glass article comprises an antiglare layer on the first main surface side;
the antiglare layer has a glass transition point Tg of equal to or less than a glass transition point Tg 0 of the glass article at a center portion in a cross section along a thickness direction; and
the first main surface has a protrusion diameter y (μm) that satisfies the relation (1) with respect to a 60° specular gloss (gloss value) x (%) of the first main surface,
y>− 0.0245 x+ 3.65  (1)

wherein the protrusion diameter y (μm) is determined by examining the first main surface with a laser microscope to obtain an XYZ data of a surface shape, obtaining an image from the XYZ data, subjecting the obtained image to a filtering with an image processing software to acquire a smoothed image, subtracting an XYZ data of the smoothed image from the XYZ data of the surface shape to obtain a profile, cutting the profile at a height of a bearing height+0.01 μm, converting a resultant protrusion section into a circle, and taking the diameter of the circle as the protrusion diameter y, and
the 60° specular gloss (gloss value) x (%) is a value measured by the method described in JIS Z8741:1997 (ISO 2813:1994).

2. The glass article according to claim 1 , wherein at least one of the first main surface and the second main surface comprises a curved portion.

3. The glass article according to claim 1 , having a ratio Z 1 /Z 0 of 0.9-1.1, wherein Z is an atomic composition ratio of X/Si between Si and an element X selected from the group consisting of Al, B, Zr, and Ti, Z 1 is the atomic composition ratio Z in the antiglare layer, and Z 0 is the atomic composition ratio Z in the glass article at the center portion in the cross section along the thickness direction.

4. The glass article according to claim 1 , having an alkali metal composition ratio represented by K/(Li+Na+K) in the antiglare layer being larger than an alkali metal composition ratio in the glass article at the center portion in the cross section along the thickness direction.

5. The glass article according to claim 1 , wherein the antiglare layer comprises a fluorine atom (F) or a chlorine atom (Cl).

6. The glass article according to claim 1 , wherein the 60° specular gloss (gloss value) x (%) is 15% or more and 130% or less.

7. The glass article according to claim 1 , comprising an aluminosilicate glass.

8. The glass article according to claim 1 , wherein the protrusion diameter y (μm) is 1.5 μm or more and 3.0 μm or less.

9. The glass article according to claim 1 , wherein the first main surface has a surface skewness Ssk of less than 0.

10. The glass article according to claim 1 , having a haze value of 0.1% or more and 50% or less.

11. The glass article according to claim 10 , having an in-plane standard deviation of the haze value of 0-10%.

12. The glass article according to claim 1 , wherein at least one of the first main surface and the second main surface comprises a surface compression stress layer having a surface compression stress (CS) of 500 MPa or higher.

13. The glass article according to claim 1 , wherein the first main surface further comprises a functional layer.

14. The glass article according to claim 13 , wherein the functional layer is an antireflection treatment layer.

15. The glass article according to claim 13 , wherein the functional layer is an antifouling treatment layer.

Assignees

• Agc Inc

Inventors

• Fukushi Takanori
• Kanasugi Satoshi
• Ikeda Toru

Classifications

• C03C3/087

  containing calcium oxide, e.g. common sheet or container glass · CPC title

• C03C15/00 Primary

  Surface treatment of glass, not in the form of fibres or filaments, by etching (etching or surface-brightening compositions, in general C09K13/00) · CPC title

• C03C3/085

  containing an oxide of a divalent metal · CPC title

• C03B25/025

  Glass sheets · CPC title

• C03B23/0252

  by gravity only, e.g. sagging (C03B23/035 takes precedence) · CPC title