Method of fabricating a glass container, and a corresponding container
The invention relates to a method of fabricating a container ( 1 ) comprising a glass wall ( 2 ) defining a reception cavity for receiving a composition for administration to a human being or to an animal, said glass wall ( 2 ) presenting an inside face situated facing said reception cavity, said method being characterized in that it comprises a step of covering at least a fraction of said inside face in a vitreous material covers said fraction of the inside face at a mass per unit area that does not exceed substantially 70 g/m 2 . The invention relates to glass containers.
1. A method of fabricating a container ( 1 ) comprising a glass wall ( 2 ) defining a reception cavity ( 3 ) for receiving a composition for administration to a human being or to an animal, said glass wall ( 2 ) presenting an inside face ( 20 ) situated facing said reception cavity ( 3 ), said method being characterized in that it comprises a step of covering at least a fraction of said inside face ( 20 ) in a vitreous material prepared using a sol-gel process so that said vitreous material ( 8 ) covers said fraction of the inside face ( 20 ) at a mass per unit area that does not exceed substantially 70 g/m 2 .
2. A method according to claim 1 , characterized in that said covering step is implemented while said fraction of the inside face ( 20 ) lies at a temperature in the range substantially 18° C. to 200° C., preferably at ambient temperature.
3. A method according to claim 1 , characterized in that said vitreous material ( 8 ) is a silica-based glass.
4. A method according to claim 1 , characterized in that said container is a bottle designed to receive an alcohol-based liquid, preferably a body fragrance.
5. A method according to claim 1 , characterized in that said vitreous material ( 8 ) covers said fraction of the inside face ( 20 ) at a mass per unit area that lies in the range substantially 30 g/m2 to 60 g/m2.
6. A method according to claim 5 , characterized in that said vitreous material ( 8 ) covers said fraction of the inside face ( 20 ) at a mass per unit area that lies in the range substantially 40 g/m 2 to 60 g/m 2 .
7. A method according to claim 1 , characterized in that, prior to said covering step, the method includes a step of preparing a substantially uniform and liquid sol by mixing together at least the following substances:
a) a precursor having alkoxy groups;
b) a solvent for said precursor, preferably an alcohol-based solvent; and
c) water.
8. A method according to claim 7 , characterized in that said substances mixed together to obtain said sol further comprise one or more functional substances selected from the following group: colorants, microbiocidal agents, medicines.
9. A method according to claim 8 , characterized in that said colorants comprise inorganic pigments.
10. A method according to claim 7 , characterized in that said substances mixed together to obtain said sol further comprise a hydrolysis catalyst, and preferably an acid hydrolysis catalyst such as acetic acid.
11. A method according to claim 7 , characterized in that the precursor includes at least one organometallic compound, preferably an alcoholate.
12. A method according to claim 7 , characterized in that the covering step includes an operation of depositing a layer of said sol on said fraction of said inside face ( 20 ) while said sol is in a substantially liquid state.
13. A method according to claim 12 , characterized in that the deposition operation consists in depositing said sol layer directly on said fraction of said inside face ( 20 ).
14. A method according to claim 12 , characterized in that the deposition operation is performed in such a manner as to deposit said layer of said sol on said fraction of the inside face ( 20 ) at a mass per unit area that does not exceed substantially 100 g/m 2 , and that preferably lies in the range substantially 50 g/m 2 to 100 g/m 2 , more preferably in the range substantially 70 g/m 2 to 90 g/m 2 , e.g. about 85 g/m 2 .
15. A method according to claim 12 , characterized in that said deposition operation comprises spraying said sol onto said fraction of the inside face ( 20 ).
16. A method according to claim 7 , characterized in that it includes a step of gelling the sol deposited on said fraction of the inside face ( 20 ), said gelling being performed by implementing the following reactions:
a)hydrolyzing the precursor in the presence of the water that contains the sol, thereby leading to the formation of silanol groups; and
b) condensing said silanol groups; said gelling step leading to a layer of gel being obtained that covers said fraction of the inside face ( 20 ).
17. A method according to claim 16 , characterized in that it includes a step of drying said gel layer covering said fraction of the inside face ( 20 ) by heating said gel layer under conditions that enable substantially all of said solvent to be extracted from the gel, the gel then transforming into said vitreous material ( 8 ).
18. A method according to claim 17 , characterized in that the drying step comprises a cycle of heating the container ( 1 ) to a temperature lying in the range substantially 60° C. to 300° C.
19. A method according to claim 7 , characterized in that, prior to said covering step, it includes a step of activating said fraction of the inside face ( 20 ) in order to facilitate bonding of the sol with said fraction of the inside face ( 20 ).
20. A container ( 1 ) comprising a glass wall ( 2 ) defining a reception cavity ( 3 ) for receiving a composition for administration to a human being or to an animal, said glass wall ( 2 ) presenting an inside face ( 20 ) situated facing said reception cavity ( 3 ), the container being characterized in that at least a fraction of said inside face ( 20 ) is covered in a vitreous material ( 8 ) prepared using a sol-gel process, said vitreous material ( 8 ) covering said fraction of the inside face ( 20 ) at a mass per unit area that does not exceed substantially 70 g/m 2 .
21. A container ( 1 ) according to claim 20 , characterized in that it is designed so that said vitreous material ( 8 ) is in contact with said composition for administration.
22. A container ( 1 ) according to claim 20 , characterized in that said glass wall ( 2 ) is translucent or transparent so that said vitreous material ( 8 ) is visible from outside the container ( 1 ).
23. A container ( 1 ) according to claim 20 , characterized in that it constitutes a bottle for receiving as a composition to be administered an alcohol-based liquid, preferably a body fragrance.
24. A container ( 1 ) according to claim 20 , characterized in that said vitreous material ( 8 ) covers said fraction of the inside face ( 20 ) at a mass per unit area that lies in the range substantially 30 g/m 2 to 60 g/m 2 .
25. A container ( 1 ) according to claim 24 , characterized in that said vitreous material ( 8 ) covers said fraction of the inside face ( 20 ) at a mass per unit area that lies in the range substantially 40 g/m 2 to 60 g/m 2 .
26. A container ( 1 ) according to claim 20 , characterized in that said vitreous material ( 8 ) is a silica-based glass.
27. A container ( 26 ) according to claim 26 , characterized in that said vitreous material ( 8 ) includes organic chains.
28. A container ( 1 ) according to claim 20 , characterized in that said vitreous material ( 8 ) includes within it one or more functional substances selected from the following group: colorants, microbiocidal agents, medicines.
29. A container ( 1 ) according to claim 28 , characterized in that said vitreous material ( 8 ) includes within it organic and/or inorganic pigments.