Device and process for uniform drying of products in web form produced by coating
AssigneeLTS Lohmann Therapie-Systeme AG
InventorsWolfgang Schäfer, Peter Schwarz, Rudi Brathuhn, Michael Hoffmann
Life of this patent
Estimating the term…
Abstract
A device and a process for drying thin layers or films which are manufactured by applying a coating mass, which is produced on an aqueous basis, to a support, the said layer or film being transported through a drying device having at least one drying zone, is characterized in that in at least one drying zone, designated as moisture-compensation zone, air is supplied which has a moisture content corresponding to the constant moisture content of the film to be prepared or the layer to be prepared.
Claims15
Process for drying thin layers or films which are manufactured by applying a coating mass, which is produced on an aqueous basis, to a support, said layer or film being transported through a drying device which has at least one drying zone, wherein in at least one drying zone, designated as a moisture-compensation zone, air is supplied which has a moisture content corresponding to the constant moisture content of the film to be prepared or the layer to be prepared.
Process for manufacturing thin films or coatings by applying a coating mass prepared on an aqueous basis and containing an organic substance to a support, transferring the composite of support and coating mass thus obtained into a drying device having at least one drying zone, and subsequent drying of the film, during which process the said film, located on the support, is conveyed through the drying device, wherein during the drying, in at least one drying zone, designated as a moisture-compensation zone air is supplied having a moisture content which corresponds to the constant moisture content of the film to be prepared.
Drying device for uniformly drying a film or a coating applied to a web-shaped support, comprising a plurality of drying zones arranged in tandem, through which the web-shaped support is transported, characterized by at least three zones arranged in tandem, namely
- at least one preheat zone;
- at least three drying zones;
- and
- at least one drying zone designated as a moisture-compensation zone, wherein
- the fresh air feed contains a device enabling or capable of adjusting moisture content of the air to a constant value, and wherein said moisture-compensation zone(s) is/are located between said drying zones.
Dependencies are inferred from the claim text.