Anti-glare surface treatment method and articles thereof
A glass article including: at least one anti-glare surface having haze, distinctness-of-image, surface roughness, and uniformity properties, as defined herein. A method of making the glass article includes, for example: depositing deformable particles on at least a portion of a glass surface of the article; causing the deposited deformable particles on the surface to deform and adhere to the surface; and contacting the surface having the adhered particles with an etchant to form the anti-glare surface. A display system that incorporates the glass article, as defined herein, is also disclosed.
1. A method of making a glass article having an anti-glare surface, comprising:
depositing deformable particles on a portion of at least one glass surface of the article comprising contacting the glass surface with a suspension of wax particles, a suspension of polymer particles, or a combination thereof;
deforming the deposited deformable particles on the surface by heating to adhere the particles to the glass surface;
contacting the glass surface having the adhered particles with an etchant to form the anti-glare surface, wherein contacting comprises exposing the glass surface having the adhered particles to the etchant for about 1 second to about 30 minutes; and
removing the adhered particles from the glass surface,
wherein the glass surface comprises at least one of a soda lime silicate glass, an alkaline earth aluminosilicate glass, an alkali aluminosilicate glass, an alkali borosilicate glass, a boroaluminosilicate glass, or a combination thereof, the etchant comprises at least one acid selected from HF, H 2 SO 4 , or a combination thereof, and the resulting glass article has a haze of less than 30, a distinctness-of-image (DOI 20°) of 25 to 85, a surface roughness (Ra) of 50 to 500 nm, and an average roughness peak-to-valley difference profile of about 0.1 to about 10 micrometers.
2. The method of claim 1 wherein contacting the at least one glass surface with a particle suspension is accomplished with a slot coater.
3. The method of claim 1 wherein the depositing is accomplished with the particle suspension free of a binder; a rheology modifier; or a combination thereof.
4. The method of claim 1 wherein the deposited deformable particles have a D 50 diameter of from about 1 to about 30 micrometers.
5. The method of claim 1 wherein the deformable particles comprise a thermoplastic, a wax, or a combination thereof.
6. The method of claim 1 wherein the deformable particles have a glass transition temperature (T g ) of from about 25 to about 95° C.
7. The method of claim 1 further comprising treating the resulting roughened surface with a low-surface energy fluorinated compound coating.
8. The method of claim 1 further comprising washing the resulting anti-glare surface, chemically strengthening the anti-glare surface, or a combination thereof.
9. The method of claim 1 further comprising, prior to etching, contacting at least another surface of the article with a removable, etch-resistant protective layer.
10. The method of claim 1 wherein depositing the deformable particles on a surface of the article with a particles suspension provides ordered particles on the surface.
11. The method of claim 10 wherein the deposited deformable particles on the surface comprise a mono-layer to a multi-layer having a wet thickness of from about 1 to about 200 micrometers, and a dry thickness of from about 0.1 to about 50 micrometers.