Method for texturing a glass surface
A method of making an article having a textured glass surface, including, for example: attaching microencapsulated particles to a portion of a glass surface of the article; and contacting the glass surface having the attached microencapsulated particles with an etchant to form the textured surface. A glass article prepared by the method including: at least one textured surface having excellent haze, distinctness-of-image, surface roughness, and uniformity properties, as defined herein. A display system that incorporates the glass article, as defined herein, is also disclosed.
1. A method of making an article having a textured glass surface, comprising:
attaching microencapsulated particles having a core and a shell to a portion of a glass surface of the article comprising depositing the microencapsulated particles on the glass surface and then thermalizing the attached particles at a temperature at or above the melt temperature of the shell and below the melt temperature of the core; and
contacting the glass surface having the attached microencapsulated particles with an etchant to form the textured surface.
2. The method of claim 1 wherein the microencapsulated particles comprise a mononuclear particle, a polynuclear particle, a matrix particle, combinations thereof, or mixtures thereof.
3. The method of claim 1 wherein the microencapsulated particles, prior to attachment, comprise a mononuclear particle having a core and a shell, the core melts at a higher temperature and has a higher acid resistance compared to the shell.
4. The method of claim 3 wherein the core and shell can each independently comprise at least one of a polymer, a wax, or a combination thereof.
5. The method of claim 1 further comprising cooling the thermalized particulated surface.
6. The method of claim 1 wherein the microencapsulated particles further comprises at least one of a surface charge modifying component, a flow aid surface modifying component, or a combination thereof.
7. The method of claim 1 wherein the microencapsulated particles, after attachment, comprise a particle comprising a core and a shell, the thickness of the shell on the core being substantially diminished or extinguished, and redistributed after attachment to the glass surface and thermalization to: between the deposited particles; between the deposited particles and the surface; or a combination thereof.
8. The method of claim 1 wherein the attaching is accomplished electrostatically.
9. The method of claim 8 wherein electrostatically attaching the microencapsulated particles to a portion of a glass surface of the article comprises charging the microencapsulated particles, charging the glass surface, or a combination thereof.
10. The method of claim 1 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 particles are comprised of at least one wax, polymer, or a combination thereof, and the etchant comprises at least one acid selected from HF, H 2 SO 4 , HCl, HNO 3 , H 3 PO 4 , or a combination thereof.
11. The method of claim 1 wherein contacting comprises exposing the glass surface having the attached particles to the etchant for about 1 second to about 30 minutes, and in the presence of a surfactant.
12. The method of claim 1 wherein the attached microencapsulated particles have a D 50 diameter of from about 1 to about 30 micrometers, a shell glass transition temperature (T g ) of from about 25 to about 200° C., and a core glass T g of from greater than the shell T g .
13. The method of claim 1 wherein the attached microencapsulated particles on the surface comprise from a mono-layer to a multi-layer of particles, the layer having a dry thickness of from about 1 to about 200 micrometers.
14. The method of claim 1 further comprising treating the resulting textured surface with a low-surface energy fluorosilane coating.
15. The method of claim 1 further comprising washing the resulting textured surface, chemically strengthening the textured surface, or a combination thereof.
16. 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.