Method for the multiple coating of a fibrous web, in particular a movable cardboard web, and apparatus for treating and/or converting fibrous webs, in particular for the multiple-layer application of liquid or pasty application media
A coating device, fibrous material technology, for the multi-layer coating of fibrous webs, in particular moving cardboard webs, and for the treatment and/or finishing of fibrous webs, in particular for the multi-layer coating of liquid Or the device field of pasty coating medium can solve the problem of non-existence of uniformity, and achieve the effect of reducing drying power, simplifying structure and high surface quality
Inactive Publication Date: 2011-11-23
VOITH PATENT GMBH
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Problems solved by technology
The resulting disadvantages of the resulting surface are the lack of uniformity and markings produced by the metering device
Method used
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[0030] figure 1 A simplified schematic view in axial section of a multilayer-coated, in particular coated, fibrous web F according to the invention is shown as a multilayer cardboard web 1 built on a waste paper basis. The axial section is cut through the YZ plane corresponding to the coordinate system assigned to the fibrous web F. FIG. The X direction here corresponds to the length direction, and the Y direction corresponds to the width direction of the fibrous web F. When the device for processing and / or finishing the fibrous web F is in continuous operation, the X direction corresponds to the running direction, or rather the machine running direction. The structure of this cardboard web 1 is represented, for example, by three different layers 2.1, 2.2, 2.3, of which the largest part in the middle, here layer 2.2, consists of mixed waste paper of lower quality. The front side 3 consists of the layer 2.1 and is denoted by 3, while the back side 4 or bottom side consists of...
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The invention relates to a method for the multiple coating of a fibrous web (F), in which method a first application medium, in a following method step (B) at least one further application medium with a replenishing application device (17) and, in one of the further method steps (C, C1, C2), at least one further third application medium are applied by way of a curtain applicator (20). The invention is characterized in that starch is applied as first application medium. The apparatus (12) for treating and / or converting the surface of a fibrous web, in particular for the multiple-layer application of liquid or pasty application media onto a paper or cardboard web, comprises a first and second replenishing application device (13, 17) and a third application device (19) in the form of a curtain applicator (20), wherein each of the individual application devices (13, 17, 19) has a drying device (15, 18, 21) arranged behind it. The apparatus (12) is characterized in that the second application device (17) has a calendering device (16) arranged in front of it.
Description
technical field [0001] The invention relates to a method for the multilayer coating of a fibrous web, in particular a moving cardboard web, with a liquid or pasty coating medium, in which the coating is applied in a single operation to produce a first coating The first coating medium of the layer, and in the next process, by means of at least one metering coating device, apply at least one other coating medium for generating at least one other coating, and in another In the process, at least one other third coating medium for producing at least one other third coating is applied by means of a curtain coating device, wherein after each application the fibrous web is dried . [0002] Furthermore, the invention relates to a device for treating and / or finishing the surface of a fibrous web, in particular for applying a liquid or pasty coating medium in multiple layers to a paper or cardboard web, which Comprising a first coating device for applying a first coating medium, at lea...
Claims
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IPC IPC(8): D21H19/54D21H19/82D21H23/72
CPCD21H19/54D21H23/56D21H17/28D21H23/72
Inventor 迈克尔.特里夫兹本杰明.曼德兹-加隆斯蒂芬.里克
Owner VOITH PATENT GMBH