Back to results
US 12,667,211 B2Granted
Multiple-use drinking straws and their production
AssigneeHilgenberg GmbH
InventorIngo Hilgenberg
Life of this patent
Estimating the term…
Abstract
The present invention deals with a tube (1) with a tube base body (2) which consists of glass, wherein at least the inside of the tube base body (2) is at least partially covered a hydrophobic coating (3). The use of such tubes (1) as drinking straws leads to multiple use, ecologically friendly drinking straws which meet hygienic requirements and have a good cleanability. The present invention also deals with a process for producing such tubes.
Claims17
Process for producing a coated glass tube comprising the following steps:
- a) providing a glass tubular base body which is hydrophobized per se;
- b) providing a solution or suspension containing a hydrophobic polymer material;
- c) contacting the glass tubular base body and the solution or suspension provided in step b) with at least an inner surface of the glass tubular base body by immersing the glass tubular base body in the solution or suspension;
- d) optionally drying the glass tubular base body obtained in step c);
- e) heat treating the glass tubular base body obtained in step c),
- wherein the hydrophobized glass tubular base body is a silanized glass tubular base body.
3 more elements
Dependencies are inferred from the claim text.