Method for preparing a glass convenient for trimming, a glass thus obtained, and method for trimming such a glass
View Patent ↗A method that allows trimming glass comprising a hydrophobic and/or oil-repellent surface coating, where a temporary protective layer is coated on the surface of said glass and the temporary protective layer imparts to the glass a surface energy of at least 15 mJ/m 2 .
1. A method for improving adhesion between ophthalmic glass comprising a hydrophobic and/or oil-repellent substrate coating and an adhesive holding pad associated with a glass trimming device, said method comprising:
applying a temporary layer on the hydrophobic and/or oil-repellent substrate coating, the temporary layer imparting to the ophthalmic glass a surface energy of at least 15 mJ/m 2 .
2. The method of claim 1 , wherein the substrate coating has an initial surface energy lower than or equal to 14 mJ/m 2 .
3. The method of claim 1 , wherein the substrate coating has an initial surface energy lower than or equal to 12 mJ/m 2 .
4. The method of claim 1 , wherein the substrate coating comprises a silane based compound bearing fluorinated groups.
5. The method of claim 4 , wherein the substrate coating has an initial surface energy lower than or equal to 14 mJ/m 2 .
6. The method of claim 4 , wherein the substrate coating has an initial surface energy lower than or equal to 12 mJ/m 2 .
7. The method of claim 1 , wherein the substrate coating has a thickness of 10 nm or less.
8. The method of claim 1 , wherein the adhesive holding pad is arranged between an acorn element and the ophthalmic glass.
9. The method of claim 1 , wherein the adhesive holding pad is a one-sided self-adhesive sticker.
10. The method of claim 1 , wherein the adhesive holding pad is a two-sided self-adhesive sticker.
11. The method of claim 1 , wherein the temporary layer is a mineral layer.
12. The method of claim 1 , wherein the temporary layer comprises one or more metallic oxides.
13. The method of claim 1 , wherein the temporary layer has a thickness less than or equal to 50 nm.
14. The method of claim 1 , wherein the temporary layer has a thickness ranging from 1 to 50 nm.
15. The method of claim 1 , wherein the temporary layer has a thickness ranging from 5 to 50 nm.
16. The method of claim 1 , wherein the temporary layer has a thickness of at least 5 microns.
17. The method of claim 1 , wherein the temporary layer has a continuous structure.
18. The method of claim 1 , wherein the ophthalmic glass further comprises an anti-reflection coating between the substrate coating and the temporary layer.
19. The method of claim 18 , wherein the anti-reflection coating is made of a mineral material.
20. The method of claim 18 , wherein the anti-reflection coating comprises multiple layers.
21. The method of claim 1 , wherein the ophthalmic glass comprises a substrate coated with a coating comprising a silane based compound bearing perfluoropolyether and/or perfluorocarbonate groups.
22. The method of claim 1 , wherein the ophthalmic glass comprises a substrate coated with a coating comprising a silane based compound bearing perfluoropolyether groups.