Method and device for coating a web material with an adhesive solution, and application

摘要

The invention relates to a method for the full-surface continuous coating of a forward-moving web material with an adhesive solution by means of a spacing doctor, in which the adhesive solution is carried along in the form of a layer by the forward-moving web material from a metering gap formed between the web material and the spacing doctor, in front of which a supply quantity of the adhesive solution is dammed up on the forward-moving web material, a rotational flow being generated in the supply quantity by the adhesive effect of the adhesive solution on the forward-moving web material. According to the invention, in so doing, a stable and cavitation-free rotational flow of the adhesive solution is set up in a partial region of the supply quantity of the adhesive solution, which is divided off on the forward-moving web material from the metering gap as far as a supply, in front of which the remaining adhesive solution of the supply quantity is held out of contact with the forward-moving web material. In a device for carrying out the method, the supply volume is divided by a partition (14) into two chambers, which communicate with each other via a supply opening in the partition, the first chamber extending between the metering gap and the supply opening and being partially bounded by the web material (1), and the second chamber, which is optionally provided with a level control device, being bounded only by fixed walls. The invention is ... Original abstract incomplete. <IMAGE>