Method for dealkalisation of borosilicate glass containers by liquid means
AssigneeSgd S.A.
InventorsPierre-Luc Etchepare, Christophe Depoilly, Jingwei Zhang
Life of this patent
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Abstract
The invention relates to a method for dealkalisation of the inside surface (5) of the wall (2) of a glass container (1), which wall (2) defines a cavity (3) and an opening (4) providing access to the cavity (3), the method comprising a step of providing a container made of borosilicate glass, wherein the inside surface of the wall is at a temperature of at least 350° C., and a step of introducing into the cavity, the inside surface being at a temperature of at least 350° C., a treatment liquid containing a substance designed to react under the effect of heat to cause dealkalisation of the glass. Methods for treating glass containers.
Claims19
A method for dealkalizing an inner face (5) of a wall (2) of a glass container (1), which wall (2) delimits an accommodation cavity
- (3) for a product, said method being characterized in that it comprises:
- a step of supplying a borosilicate glass container (1), the inner face (5) of the wall (2) of which is at a temperature of at least 350° C., and
- a step of introducing into said accommodation cavity (3), with said inner face (5) being at a temperature of at least 350° C., a treatment liquid containing a treatment substance designed to react under the effect of the heat from the inner face (5) of the wall (2) of said glass container (1) to bring about dealkalization of the glass;
- wherein said glass container (1) is made of moulded glass.
A method for dealkalizing an inner face (5) of a wall (2) of a glass container (1), which wall (2) delimits an accommodation cavity (3) for a product, said method being characterized in that it comprises:
- a step of supplying a borosilicate glass container (1), the inner face (5) of the wall (2) of which is at a temperature of at least 350° C.;
- and
- a step of introducing into said accommodation cavity (3), with said inner face (5) being at a temperature of at least 350° C., a treatment liquid containing a treatment substance designed to react under the effect of the heat from the inner face (5) of the wall (2) of said glass container (1) to bring about dealkalization of the glass;
- wherein said step for introducing said treatment liquid comprises at least one operation of injecting a predetermined dose of said treatment liquid;
- and
- wherein a volume of said predetermined dose of treatment liquid is chosen between 5 μL and 50 μL.
A method for dealkalizing an inner face (5) of a wall (2) of a glass container (1),
- which wall (2) delimits an accommodation cavity (3) for a product, said method
- being characterized in that it comprises:
- a step of supplying a borosilicate glass container (1), the inner face (5) of the wall (2) of which is at a temperature of at least 350° C.;
- and
- a step of introducing into said accommodation cavity (3), with said inner face (5) being at a temperature of at least 350° C., a treatment liquid containing a treatment substance designed to react under the effect of the heat from the inner face (5) of the wall (2) of said glass container (1) to bring about dealkalization of the glass;
- wherein said step for introducing said treatment liquid comprises at least one operation of injecting a predetermined dose of said treatment liquid, said injection operation being carried out using an injection head (11) located at a distance from the opening (4) of the container (1) and outside the latter,
- said injection head (11) being located substantially facing the opening (4) of said glass container (1) and at a distance (d) between 1 cm and 20 cm from said opening (4) during said injection step.
Dependencies are inferred from the claim text.