US 12,391,605 B2
Production method for sheets of glass with a diffuse finish, and resulting sheet of glass
Jose Luis Tavares Cortes, Nuevo León (MX); Arturo Si Ming Lamshing Tai, Nuevo León (MX); Gerardo Soto Puente, Nuevo León (MX); and Jorge Sanchez-Gonzalez, Nuevo León (MX)
Assigned to Vidrio Plano de México, S.A. de C.V., Nuevo León (MX)
Filed by Vidrio Plano de Mexico, S.A. de C.V., Nuevo León (MX)
Filed on Jan. 31, 2022, as Appl. No. 17/588,727.
Application 17/588,727 is a division of application No. 16/437,733, filed on Jun. 11, 2019, granted, now 11,261,127.
Application 16/437,733 is a division of application No. 15/322,284, granted, now 10,358,382, issued on Jul. 23, 2019, previously published as PCT/MX2014/000098, filed on Jun. 27, 2014.
Prior Publication US 2022/0153633 A1, May 19, 2022
Int. Cl. B32B 15/04 (2006.01); B32B 17/06 (2006.01); C03C 15/00 (2006.01); C03C 15/02 (2006.01); C03C 23/00 (2006.01); G02B 5/02 (2006.01)
CPC C03C 15/00 (2013.01) [C03C 15/02 (2013.01); C03C 15/025 (2013.01); C03C 23/0075 (2013.01); G02B 5/0221 (2013.01); G02B 5/0268 (2013.01); G02B 5/0294 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A glass sheet with diffuse finish produced by the process of:
a) Providing a sheet of glass;
b) Providing a first immersion of the glass sheet in a first acidic solution for a predetermined time, to remove impurities from the glass, wherein the first acidic solution is a hydrochloric acid solution of 32.5% hydrochloric acid by volume;
c) Rinsing or washing the glass sheet once it has been immersed in the first acidic solution to remove the remaining acidic solution and avoid the formation of undesirable lines and marks in the glass; and
d) Providing a second immersion step to said glass sheet in a second acidic solution for a second predetermined time, wherein the second acidic solution comprises a mixture of 70% ammonium difluoride and 30% of 32.5% hydrochloric acid by volume to generate a diffuse finish on both sides of the glass,
wherein the process generates in the glass sheet, on at least one side, a diffuse surface with a peak-valley roughness (Rt) from 5.8343 μm to 9.3790 μm; an average roughness (Ra) between 0.8020 μm and 0.9538 μm; RMS roughness between 0.9653 μm and 1.19167 μm; a solar transmission between 84.8% and 46.50%; a solar reflection between 7.4 and 4.4%; a light transmission between 88.5% and 67.70%; a reflection of light between 6.50% and 5.20%; and UV transmission between 35.60% and 70.20%.