EP2157238B1 - Device for creating coated paper, cardboard or other strips of fibrous material with at least one thermo-sensitive layer and method for operating such a device - Google Patents
Device for creating coated paper, cardboard or other strips of fibrous material with at least one thermo-sensitive layer and method for operating such a device Download PDFInfo
- Publication number
- EP2157238B1 EP2157238B1 EP09168032A EP09168032A EP2157238B1 EP 2157238 B1 EP2157238 B1 EP 2157238B1 EP 09168032 A EP09168032 A EP 09168032A EP 09168032 A EP09168032 A EP 09168032A EP 2157238 B1 EP2157238 B1 EP 2157238B1
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- EP
- European Patent Office
- Prior art keywords
- layer
- web
- functional
- forming unit
- forming
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
- D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
- D21H23/22—Addition to the formed paper
- D21H23/46—Pouring or allowing the fluid to flow in a continuous stream on to the surface, the entire stream being carried away by the paper
- D21H23/48—Curtain coaters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
- B05C5/005—Curtain coaters
Definitions
- the invention relates to a device for producing coated paper, cardboard or other fibrous webs with at least one thermosensitive layer as a functional layer by applying a thermosensitive coating medium on a carrier web by means of a functional layer forming unit comprising an applicator and a drying line.
- the invention further relates to a method for operating a device for producing coated paper, cardboard or other fibrous webs with at least one thermosensitive layer.
- carrier webs are to be understood which have at least one thermosensitive layer on one or both sides.
- suitable webs such as films, in particular plastic films or textile webs are inventively treatable.
- thermosensitive layer is understood to mean a coating layer which is suitable for imaging visually detectable information by discoloration on exposure to heat, in particular contact with a heatable writing head. This comprises at least a color former, a color developer and a binder.
- the invention is therefore based on the object, a device for providing coated paper, - cardboard or other fibrous webs, in particular in the form of thermal paper to develop such that the disadvantages are avoided.
- the device should be characterized by a structurally simple design with a low number of components and be suitable, a carrier web both one-sided multiple, especially many times It should still be on the EP 1 538 262 A1 to get expelled.
- a double coating system is disclosed. This system has two applicators, with which each of the top, that is, by means of coating agent curtains, the coating material is applied, so that a double layer is formed on the moving material web.
- From the W02004 / 001133 A2 is a device with two applicators for two-sided brushing a web removed. Both applicators, which may be curtain applicators, downstream of a drying device.
- a device for producing coated paper, board or other fibrous webs with at least one thermosensitive layer as a functional layer by applying a thermosensitive coating medium on a carrier web by means of a functional layer forming unit comprising an applicator and a drying sections characterized in that the first Functional layer forming unit comprises an applicator in the form of a multi-layer curtain applicator with at least one dispensing nozzle and a downstream drying section and the second functional layer forming unit also comprises an applicator in the form of a multi-layer curtain applicator with at least one dispensing nozzle and a downstream drying sections, wherein a first Bru Adjustsweg below Including the applicator of the second functional layer-forming unit and a second web guide path and means for bypassing the applicator are provided.
- the means for bypassing the applicator device to include the easiest case guide and / or guide elements for guiding the carrier web, which are arranged and designed to be suitable, a branch in the web guide behind the first functional layer-forming unit and before the application device of Forming second functional layer forming unit to form the first Bruestsweges on the applicator and the second Bruestsweges in the form of a bypass to the applicator and a merger of the two web guide paths.
- the device according to the invention is characterized by the provision of only two functional layers forming units, which are suitable by the intelligent arrangement and control of their operations to produce a variety of different types of single or multiple coated one-sided or double-sided paper, carbon or other Faserstoffbahhen with little effort , free from a conversion of the device. This exists the possibility of a timely change with optimal utilization of the individual components of the individual functional layers forming units.
- the carrier web can be guided either with deactivated application device of the second functional layer-forming unit via the first web guide path within this or via the second Bru arrangementsweg directly to the drying section of the second functional layer-forming unit. If now additionally the application device of the second functional layer-forming unit is activated and the carrier web guided over the first Bru arrangementsweg within this, depending on the arrangement and web guide between the first and second functional layer-forming device either a coating on the Back of the carrier web or another third layer can be applied to the same side. In the latter case, however, the drying capacity of the drying section of the first functional layer-forming unit is to be designed for twice the order, so that the required dry content of the coating is achieved before the application of the further third layer.
- the application device and the drying section in a functional layer-forming unit are designed and arranged such that the carrier web is guided within at least the first, preferably also the second functional layer forming unit free from a change of direction (reversal of the direction taken curve) in the longitudinal direction of the device considered it is ensured that in any case the coated surface is subjected to secondary drying.
- the arrangement and alignment of the components of the functional layer-forming units to each other there are basically two possibilities. According to a first embodiment, these are preferably in a common horizontal plane, i. arranged offset from each other in the vertical direction. According to a second embodiment, the arrangement with offset in the vertical direction to each other.
- the first embodiment forms a very compact in terms of extent in the height direction unit, while the second embodiment allows adaptation to space conditions.
- the arrangement of the individual functional layers forming units can be done in various ways.
- the arrangement of the functional layer-forming units in the direction of passage of the carrier web takes place behind one another such that the guide direction of the carrier web in the connecting region between the two functional layer-forming units is characterized by at least one change of direction in the longitudinal direction of the device.
- the intended direction change in particular a loop-like leadership allows an arrangement of the functional layer-forming devices in vertically offset planes, wherein the offset in the longitudinal direction of the device between the two functional layer-forming units can be minimized.
- the first embodiment is characterized by a high degree of compactness in the longitudinal direction with simultaneous optimal utilization of space in the vertical direction.
- the arrangement of the unit forming the second functional layer spatially in the longitudinal direction of the device takes place completely in the region of the extension of the first functional layer-forming unit.
- the two functional layer-forming units are formed and arranged one behind the other viewed in the longitudinal direction of the device, that the guidance of the carrier web in the longitudinal direction of the device is free from a reversal of the taken curve direction.
- the two functional layer-forming units are arranged in a horizontal plane.
- the first and the second functional layer-forming unit are aligned in opposite directions.
- the carrier web is guided between the two functional layer-forming units without further interposition of a web turning devices such that they undergo a reversal of the orientation of their top and bottom between these, in particular with respect to the respective applicators of the individual functional layer forming unit.
- the orientation change of the carrier web sides with respect to the respective application devices of the individual functional layer-forming units is in the simplest case via means for changing the direction of the web guide with respect to the longitudinal direction of the device, in particular the corresponding arrangement of web guiding and guide rollers.
- the drying section of the second functional layer-forming unit can either be arranged downstream of the means for bypassing the application device of the second functional layer-forming unit, in particular by-pass or, according to a second embodiment, in the bypass.
- the means for web guide in these areas are designed and arranged such that these according to the first embodiment, a guide of the carrier web through the second functional layer forming unit regardless of whether the carrier web on the applicator and subsequently the drying line or bypassing the applicator via the drying section is guided, always allow in the same direction.
- the drying section in the different modes which are characterized by the different ways of guiding the carrier web on the applicator or bypassing this, in the opposite direction.
- the first embodiment can be configured in a particularly space-saving manner by the two functional layers forming units are arranged offset from one another in the vertical direction, wherein the position of applicator and drying line between them in the longitudinal direction of the device is reversed.
- the second embodiment allows the arrangement of application device and drying section of the second functional layer-forming unit in vertically offset planes free of offset in the longitudinal direction of each other.
- the application device of the functional layer-forming units comprises a multi-layer curtain applicator, which allows an application of application medium in the form of a single or multi-layer application media curtain produced at a trailing edge and moving in the direction of the carrier web in free fall.
- the curtain applicator comprises at least one applicator nozzle extending in the width direction of the carrier web, which has at least one application media feed with an application media supply system connected is.
- the nozzle or the curtain applicator can be formed in a known manner as a slot die or slide die. This allows the simultaneous application of at least two layers with one device.
- At least two application media provision systems can be assigned to the rapid change between different types of layer to be applied by means of a curtain applicator, which can be accessed alternately depending on the requirements of the application medium, for example by the optional coupling of the application media supply with the different application media delivery systems.
- the single drying section of a functional layer-forming unit comprises at least one drying device, in particular in the form of a contactless drying, such as e.g. a hot air dryer.
- a contactless drying such as e.g. a hot air dryer.
- This can be gas or steam heated.
- Other drying systems such as infrared radiators and contact dryers, such as drying cylinders, are also possible.
- the drying section is designed as a function of the dry content of the layer applied with the upstream application device.
- the drying section is preferably straight, but may also be characterized by a curved or other course.
- the drying can be done on one side or on both sides, with designs with either one or two-sided operation are conceivable.
- the carrier web is usually unrolled from a web roll and pulled through the device by means of appropriate pulling devices. Subsequent to the second functional layer-forming unit, the winding of the coated fibrous web takes place on a take-up device.
- each functional layer-forming unit is associated with a pulling device.
- thermosensitive layers can be applied as functional layers in addition to thermosensitive layers and other layers, such as cover layers in the form of protective layers.
- the latter are characterized by a lower basis weight in the range of 0.5 to 6 g / m 2 than the thermosensitive layers, the basis weight of which is preferably selected in the range of 1 to 7 g / m 2 .
- a web turning device is provided to form a further third web guide path and means for bypassing the web turning device between two functional layers forming units.
- the second application device of the second functional layer-forming unit also comprises a multi-layer curtain application unit. This makes it possible to produce a plurality of desired different layers even with the second functional layer-forming unit.
- the solution according to the invention is particularly suitable for the production of thermal paper.
- the invention can also be applied to other web-form materials suitable as recording media, such as films or textile materials
- the device according to the invention can be operated by controlling the web guide and the individual components of the functional layer-forming units in different operating modes.
- a first mode of operation the carrier web is guided successively forming at least one first layer through the first functional layer forming unit and a second layer through the second functional layer forming unit, while in a further second mode the carrier web successively forming at least a first layer through the first Functional layer-forming unit and free of an order by the second functional layer-forming unit is performed.
- a first mode of operation the carrier web is guided successively forming at least one first layer through the first functional layer forming unit and a second layer through the second functional layer forming unit, while in a further second mode the carrier web successively forming at least a first layer through the first Functional layer-forming unit and free of an order by the second functional layer-forming unit is performed.
- one-sided or single-sided or multiply coated carrier webs can be produced on one side.
- the carrier web is preferably guided over the drying section of the second functional layer-forming unit in the second mode of operation by forming at least two layers through the first functional layer-forming unit and utilizing the drying capacity of the second functional layer-forming unit, the device can be operated particularly energy-efficiently. If at least two layers are applied in two functional layer-forming units, multiply coated or multiply coated paper, board or other fibrous webs can be produced in a simple manner on one side.
- FIGS. 1a to 1g illustrate in schematic highly simplified representation on the basis of an axial section through a coated fibrous web 10 possible basic versions of these, as they can be provided with a device 1 according to the invention.
- the coated web 10 present at the end of the process is a carrier web T, which is in the form of a fibrous web F in the form of a paper web and which is provided on at least one of its surfaces, ie on its upper side 2 and / or on its underside 3 Functional layer is characterized.
- Functional layer is understood to mean a layer which has been applied uniformly over the entire surface of the web for the purpose of achieving additional functions or properties.
- the following description relates to the provision of thermal paper in which the carrier web T is formed by the fibrous web F, which is subsequently subjected to a refining process either on- or offline.
- the coated web 10 is characterized in a coordinate system by an extension in the longitudinal and width directions, which corresponds to the X and Y direction and by a height in the Z direction.
- the axial section illustrates the representation in the YZ plane.
- thermosensitive layer For the production of thermal paper, which is understood as meaning a paper web having at least one heat-sensitive layer which discolors on very brief contact with a heated element, a functional layer in the form of a thermosensitive layer is applied to the upper and / or lower side 2, 3.
- the FIG. 1a illustrates an embodiment of the coated web 10 in the form of a one-sided simply coated thermal paper. Visible here is the order of the functional layer in the form of the thermosensitive layer 4 on the upper side 2 of acting as a carrier web T fibrous web F.
- This comprises at least a color former and a color developer. These disperse in a binder that does not or only insubstantially melts during heat development.
- the weight per unit area of the thermosensitive layer 4 in the final state, ie in the dried state, is in the range between 1 and 7 g / m 2 , more preferably 2 to 5 g / m 2 .
- FIG. 1b illustrated by an axial section according to FIG. 1a a further development of the coated web 10, in which in addition to the thermosensitive layer 4, a further functional layer is applied as a protective layer in the form of a cover layer 5. This is usually transparent.
- FIG. 1c clarifies a further development according to FIG. 1b in which a further functional layer 17 has been applied between the first thermosensitive layer 4 and the covering layer 5 functioning as a protective layer.
- This can likewise be characterized by thermosensitive properties or else further properties describing the protective function of the thermosensitive layer.
- Figure 1d is characterized by a further second additional functional layer 18. These may also be formed as a thermosensitive layer or additional protective layer.
- FIGS. 1a to 1d one-sided coated paper, cardboard or other fibrous webs 10, illustrates the Figure 1e by way of example with reference to an axial section, a fibrous web 10 which is simply coated on both sides and is characterized on the upper side 2 and the underside 3 of the carrier web T by a functional layer in the form of a thermosensitive layer 4, 6. Again, the individual thermosensitive layers 4 and 6 completely cover the surfaces formed by the upper and lower sides 2, 3.
- FIG. 1f illustrates an embodiment of a two-sided, for example on the top 2 twice and the bottom 3 simply coated fibrous web 10th
- FIG. 1g illustrates a further development of a coated fibrous web 10 according to FIG. 1f ,
- the web 10 is characterized by a double-sided multiple, in particular two-fold coating of the carrier web T.
- the thermosensitive layer 4 and the cover layer 5.1 are applied.
- a thermosensitive layer 6 and a cover layer 5.2 are also applied on the underside 3.
- FIGS. 1a to 1g According to the invention, corresponding devices 1 for coating and / or refining surfaces according to the invention, which are shown in the form of so-called thermal papers, can be produced simply and cost-effectively FIGS. 2 to 5 used.
- FIGS. 2a and 2b illustrate in a schematic simplified representation of the basic structure and the basic function of two particularly advantageous and compact inventively designed devices 1 for producing coated paper, cardboard or other fibrous webs 10 with at least one functional layer in the form of a thermosensitive layer 4 and 6, constructed and arranged is that this is suitable either to be coated carrier web T, or fibrous web F on both sides, that is to be coated on the top 2 and the bottom 3 or on one side to produce a multiple coating.
- the device 1 comprises two functional layer-forming units 7 and 8, which can be switched individually or in series in the direction of passage of the carrier web T to be coated, ie successively under the action of the carrier web T.
- Each of the individual, one Functional layer forming unit 7, 8 comprises at least one applicator A1, A2, in the form of a multi-layer curtain applicator with corresponding application nozzles or dispensing slots, which are designated in the example with CC1, CC2, CC3, CC4.
- the application nozzles suitable for multilayer coating are free of intermediate drying of the carrier web.
- At least the first functional layer forming unit 7 in the direction of movement of the carrier web T comprises a multi-layer curtain applicator with at least two such application nozzles arranged immediately after one another and becoming effective in the carrier web passage direction.
- the second functional layer-forming unit 8 arranged in the direction of movement of the carrier web T likewise comprises such an application device A2, in the form of a multi-layer curtain application unit.
- the functional layer-forming unit 7, 8 further comprises at least one drying section TS1 or TS2, each with at least one drying device.
- the drying section TS1 of the first functional layer-forming unit 7 is arranged downstream of the curtain applicator.
- the arrangement of the drying section TS2 takes place in a web-guiding branch, which enables a bypassing of the application device A2.
- corresponding means 14 for bypassing the application device A2 of the second functional layer-forming unit 8 are provided, preferably in the form of a bypass.
- a first web guide path is characterized by the guide within the first functional layer-forming unit 7 and designated I.
- the second web guide path is characterized by the second functional layer-forming unit 8 and denoted by II. This can be subdivided into at least two subregions IIa, IIb, wherein a first region IIa describes the guidance of the carrier web T via the applicator A2, while IIb describes a further web guiding path, bypassing A2.
- the web guide has, after the first functional layer-forming unit 7, in which the corresponding web guide region is denoted by I, a branch 11 which allows the first web guide path IIa via the applicator A2 and the second web guide path IIb in the bypass, wherein the two Path guide paths IIa and IIb are merged into 13.
- the drying section TS2 is in accordance with FIG. 2a arranged in the described by the bypass Bru arrangementsweg IIb, but downstream of the merge 13 and according to FIG. 2b arranged directly in the bypass to the curtain applicator CC3 before merging 13 both web guide paths IIa and IIb.
- the two functional layer-forming units 7 and 8 are each arranged between a unwinding device 9 for the carrier web T, ie, the fibrous web F and a winding device 12 for the coated fibrous web 10.
- the web guide path IIb extends to the take-up device 12.
- the web guide between the unwinding device 9 and the winding device 12 takes place according to the first embodiment with at least one direction change, that is, the individual functional layers forming units 7 and 8 are preferably arranged in the vertical direction in staggered planes in the device 1.
- a coordinate system for clarifying the individual directions is given for this purpose.
- the X direction corresponds to the rule of the longitudinal or machine direction, while the Y direction describes the width direction and the Z direction describes the height direction. It can be seen that the individual units 7 and 8 forming the functional layers are passed in the opposite direction, that is to say for the unit 7 in the positive X direction and the unit 8 in the negative X direction.
- drying section TS2 Due to the arrangement of the drying section TS2 in a web guide region, which is suitable for bypassing the application device A2, in particular the curtain applicator, different modes of operation of the device 1 are possible. These are characterized by the guidance of the carrier web T to be coated over the different web guiding regions I, IIa, IIb in different directions.
- FIG. 2a illustrated embodiment illustrates a particularly compact basic design according to the advantageous first embodiment, in which the leadership of the carrier web T is characterized by at least one change of direction between the unwinding device 9 and the winding device 12.
- the drying section TS2 is indeed arranged in the bypass to the application device A2 of the second functional layer-forming unit 8, but this, in particular the merger 13 of the two web guide paths IIa, IIb is arranged downstream.
- the web guide is characterized by a branch, which is denoted by 11 and divides the theoretically possible Bru entrysweg in the two web guide portions, the Bahn entrysweg IIa and a Bru arrangementsweg IIb, which extends from the branch 11 via the merger 13 to the take-up device 12.
- the drying line TS2 is installed.
- the arrangement of the two functional layers forming units 7 and 8 takes place in two different vertical planes.
- the extent of both units - viewed in the longitudinal direction and thus in the X direction - is substantially free of offset from each other.
- the arrangement can likewise take place in one plane or in several different planes in the vertical direction.
- a plurality of drying devices are provided in particular in the individual units 7 and 8, which are preferably arranged in U- or V-shaped arrangement to each other, wherein the web guide varies accordingly.
- the individual functional units in particular application device A2 and drying section TS2 of the second functional layer-forming unit 8, are preferably arranged by the arrangement of the web guide paths IIa, IIb which are staggered in the vertical direction. As a result, a relatively compact device 1 in the axial direction can be created.
- the change in direction of the web guide between the first and second functional layer forming unit 7, 8 causes a reversal of the orientation of the top and bottom 2, 3, so that in the second functional layer forming unit 8 now the bottom 3 is treated.
- FIG. 2b an arrangement of the drying section TS2 directly in the bypass to the applicator A2.
- the guidance of the carrier web T takes place in the different modes of operation in different directions over the drying section TS2.
- Due to the arrangement in the bypass is also to ensure that the drying section TS2 is also followed by order on the applicator A2 this downstream.
- at least one further Bru adjustmentsweg III is provided, which allows a further change of direction in the web guide.
- the device 1 allows different modes of operation by controlling the individual functional units, in particular the multi-layer curtain applicators.
- the Figure 2c1 illustrates the production of a one-sided double-coated carrier web T according to FIG. 1b , In this, the carrier web T is guided in accordance with the Bru arrangementsweg I and IIb, bypassing the Bru arrangementsweges IIa according to a mode of operation.
- the multi-layer applicator of the first functional layer-forming unit 7 brings with its nozzle or its application slot CC1 a thermosensitive layer 4 on the surface of the upper side 2 of the carrier web T and at the same time acting as a cover layer protective layer 5 with the application nozzle CC2.
- the drying capacity of the second functional layer-forming unit 8 which is not used in this functional state for applying a coating, used with.
- the carrier web T with the two layers 4 and 5 is guided over the first dryer section TS1 and subsequently along the web guide path IIb, bypassing the applicator A2 via the dry line TS2.
- the guide is in the machine direction opposite to the guide direction within the functional layer forming unit 7.
- This first mode of operation is based on a signal flow diagram in the Figure 2c1 exemplified and illustrates the consecutively traversed stations within the device 1 between the unwinding device 9 and the winding device 12.
- Figure 2c2 in accordance with the basic configuration theoretically possible operation for producing a double-sided easily coated fibrous web 10.
- both functional layers forming units 7 and 8 with respect to their applicator A1, A2 and the drying line TS1, TS2 each successively through.
- the web guide paths I, IIa and a subregion of IIb, which is present after the merge 13, are used.
- thermosensitive layer 4 is applied to the upper side 2 of the carrier web T by means of the applicator within the first functional layer forming unit 7, here exemplarily the curtain applicator and the applicator CC1, which then the drying line TS1, then due to the inversion the web guide with its underside 3 now passes through the application device with the application nozzle CC3 and subsequently the drying section TS2, after which the required dry content has been reached and the reeling can take place on the takeup device 12.
- FIGS. 2a to 2c illustrate a particularly advantageous embodiment with an arrangement of the individual functional layers forming units 7, 8 offset in the vertical direction to each other with directional change of the web guide, reversing the orientation of the top and bottom 2, 3 of the carrier web T.
- the embodiment not shown here an arrangement of the two functional layers forming units 7, 8 in the longitudinal direction one behind the other free from a change in direction of the web guide.
- a web turning device can additionally be provided in the connecting region between two functional layers forming units 7, 8 in order to be able to produce the same material web types.
- FIGS. 2a to 2c shows the FIG. 3 a concrete constructive implementation in a schematic simplified representation of an embodiment according to FIG. 2b ,
- the same reference numerals are used for the same elements.
- a coordinate system for clarification of the individual directions within the device 1 is given again.
- the arrangement of the two functional layers forming units 7 and 8 also takes place in different vertical planes, wherein the extension in the axial direction preferably takes place free of offset from one another.
- the arrangement of the drying section TS2 takes place in the bypass to the application device A2 of the second functional layer-forming unit 8. This results in the need for further web guiding areas to allow a guide of the carrier web T in the different modes in different directions through the drying line TS2.
- the web guide path IIa is provided, which describes the area in which the applicator A2 is arranged, while the web guide path in the bypass area to the applicator A2 is designated IIb.
- a further third web guide path III is provided, which in a mode of operation in which a layer 8 is also applied via the second functional layer forming unit to the carrier web T, guides the carrier web T through the dry line TS2 in FIG opposite direction to the passage when bypassing the applicator A2 to the take-up device 12 allows.
- FIG. 3 illustrates here by means of a continuous line the web guide within the device 1 in the first mode, that is, for applying a multiple line on the top 2 of the carrier web T in the form of the fibrous web F and the utilization of the drying capacities of both functional layers forming units 7 and 8.
- This embodiment uses while the web guide areas I and IIb from. The web guiding areas IIa and III are not considered.
- the fibrous web F is guided via the web guiding path IIa and subsequently via the drying section TS2 and the web guiding path III to the winding device 12.
- the fibrous web F undergoes this process a repeated change of direction.
- the individual guide elements and guide rollers are arranged in such a way that they enable a direction reversal or change between the first drying section TS1 of the unit 7 and the application device A2 of the second functional layer-forming unit 8. Subsequent to the application device A2, the drying section TS2 is traversed in the opposite direction and, after another reversal of direction following the drying section TS2, returned to the winding device 12.
- corresponding means for carrier web guide in the form of guide rollers and guide rollers are provided, which allow these individual changes in direction.
- corresponding pulling devices Z1 to Z3 are required.
- the individual drying sections TS1 and TS2 contain at least one drying device, preferably a plurality of series-connected drying devices HLT1.1 to HLT1.3 and HLT2.1 to HLT2.3, which are operated with hot air that is gas- or steam-heated.
- the in the FIG. 3 shown drying devices are designed such that between them, the leadership of the carrier web T via guide rollers.
- the arrangement of the individual drying sections TS1 of the first functional layer-forming unit 7 and TS2 of the second functional layer-forming unit 8 preferably takes place in the form of tunnel driers free of the interposition of guide rollers connected in series in two vertical planes.
- the execution according to FIG. 4 corresponds essentially to the embodiment according to FIG. 2a in which the guide in the bypass is free of an arrangement of the drying section TS2 and the drying section TS2 is arranged downstream of the branch 11 or the combination 13, as it were.
- This design allows a very space-saving arrangement in the axial direction.
- the applicator A2 of the second functional layer-forming unit 8 is arranged in the axial direction offset from the extension of the first functional layer-forming unit 7.
- FIG. 4 shown theoretically possible structural design is essentially by in the FIG. 2a described pathways I, IIa, IIb characterized.
- a guide either via further guide rollers to the next application device A2, here with the application nozzles CC3 and CC4, wherein the guide is made so that now the bottom is coated and subsequently to the drying section TS2 Winding device 12 is guided.
- guidance is via the first mode Part of a requiredPoltrockenumble, which is formed by the drying section TS1 and also taking advantage of the drying capacity of the second functional layer forming unit 8 via the drying line TS2 bypassing the applicator A2, in particular with the application nozzles CC3 and CC4.
- the web turning device 15 is preferably arranged between the coupling of the first functional layer-forming device 7 and the second functional layer-forming device 8 in a bypass.
- This is designated 16 here.
- FIG. 5 clarifies this in a further development of the execution accordingly FIG. 4 an embodiment according to the in FIG. 2a described basic principle with additional web turning device 15.
- a further web guiding region IV is provided here, which forms the bypass 16.
- the functional layers forming units 7 and 8 are arranged offset from each other in the vertical direction, so that the guidance of the carrier web T takes place in these oppositely directed.
- the first functional layer forming unit 7 is followed in the web guide to a branch 11, which is connected to the web guide portion IIa, IIb, in which the application devices A2 of the second functional layer-forming unit 8 are arranged and also a bypass to this, which is a partial area the Bru arrangementsweges IIb forms.
- the drying section TS2 is also arranged here after the merge 13 in the web guide path IIb.
- multi-layer curtain applicator By providing in the second functional layer forming unit 8 multi-layer curtain applicator with the application nozzles CC3, CC4 results in a variety of modes of operation for one-sided coated carrier webs T in the FIGS. 6a to 6d while double-coated Subahnen the individual process steps in the FIGS. 7a to 7c are shown.
- FIG. 6a illustrates exemplified based on a signal flow diagram, the individual acting on the carrier web T functional units that are run through successively.
- activation of the application device A1 in the form of the multi-layer curtain application unit with the application nozzles CC1 or CC2 takes place for the one-sided application on the upper side 2 of the carrier web T, here by way of example CC1.
- CC2 is disabled in this case.
- the drying devices HLT2.1 and 2.2 of the second drying section TS2 need not be activated.
- FIG. 6b1 illustrated by means of a signal flow diagram, the individual process steps for generating a multiple job, in particular a double coating.
- an application with the application nozzles CC1 and CC2 is possible, CC1 applying the thermosensitive layer and by way of example the required cover layer 5 in the form of the protective layer being produced by means of CC2.
- the entire coating is applied over the two drying sections TS1 and TS2 of the two functional layer-forming units to the required dry content.
- the individual layers are produced by the application devices A1, A2 of both functional layer-forming units 7 and 8.
- one of the two application devices of the first functional layer-forming units 7 is deactivated, preferably CC2, and the order of the thermo-sensitive layer is preferably done by CC1.
- the web After passing through the drying section TS1, the web is turned over the web turning device 15 before being fed to the application device of the second functional layer-forming unit 8, so that in turn the top side 2 can be provided with a coating over the individual application nozzles CC3 or CC4.
- One of the two devices assumes this function and subsequently the thus-coated carrier web T is fed to the drying section TS2 and passes through the two hot air dryers HLT2.1 and HLT2.2.
- FIG. 6b2 extended to the effect that in one of the two functional layers forming units 7 or 8, a further application device is also active.
- FIG. 6c by means of the application nozzles CC1 and CC2, after passing through the drying section TS1 and the web turning device 15 by means of the nozzles CC3 or CC4 and passing through the drying section TS2, a triple-coated fibrous web 10 is produced.
- the further nozzle CC4 of the second functional layer-forming unit 8 can also be activated, as in FIG FIG. 6d played.
- thermo-sensitive layer 4 is applied to the upper side 2. This is passed over the drying line 1 and spent on the required dry content, in order subsequently to obtain at the bottom 3, the required further thermosensitive layer 6, which is spent in the downstream drying section TS2 to the required dry content.
- a carrier web T coated on both sides with a double layer on one side the first example is shown here by way of example Functional layer forming unit 7 is activated and applied to the thermosensitive layer 4, the required cover layer 5, wherein the two layers of the drying section TS1 are supplied, dried over this and then the bottom 3 coated by the applicator A2 of the second functional layer forming unit 8 and is dried over the drying section TS2, wherein in this further also a drying of the multi-layer takes place at the top 2.
- FIG. 7c clarified in a further development according to FIG. 7b the additional activation of the second application nozzle CC4 of the second functional layer-forming unit 8.
- the inventive solution is here not limited to these embodiments.
- the basic configuration is based on two functional layers forming units 7, 8, over which a very large number of multiple coatings can be achieved.
- the only requirement is the arrangement of the second functional layer-forming unit 8 in such a way that the applicator A2 of the second functional layer-forming unit can be bypassed in the bypass.
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Abstract
Description
Die Erfindung betrifft eine Vorrichtung zur Erzeugung von beschichteten Papier,-Karton- oder andere Faserstoffbahnen mit mindestens einer thermosensitiven Schicht als Funktionsschicht durch Auftragen eines thermosensitiven Auftragsmediums auf eine Trägerbahn mittels einer eine Funktionsschicht bildenden Einheit, umfassend eine Auftragseinrichtung und eine Trockenstrecke.The invention relates to a device for producing coated paper, cardboard or other fibrous webs with at least one thermosensitive layer as a functional layer by applying a thermosensitive coating medium on a carrier web by means of a functional layer forming unit comprising an applicator and a drying line.
Die Erfindung betrifft ferner ein Verfahren zum Betreiben einer Vorrichtung zur Erzeugung von beschichteten Papier,- Karton- oder anderen Faserstoffbahnen mit zumindest einer thermosensitiven Schicht.The invention further relates to a method for operating a device for producing coated paper, cardboard or other fibrous webs with at least one thermosensitive layer.
Im Sinne der Erfindung sollen Trägerbahnen verstanden werden, die auf einer oder beiden Seiten zumindest eine thermosensitive Schicht aufweisen. Aber auch andere als Aufzeichnungsmedium geeignete Bahnen, wie Folien, insbesondere Kunststofffolien oder textile Bahnen sind erfindungsgemäß behandelbar.For the purposes of the invention, carrier webs are to be understood which have at least one thermosensitive layer on one or both sides. But other than recording medium suitable webs, such as films, in particular plastic films or textile webs are inventively treatable.
Unter einer thermosensitiven Schicht wird eine Auftragsschicht verstanden, welche geeignet ist, unter Einwirkung von Wärme, insbesondere Kontakt mit einem beheizbaren Schreibkopf eine visuell erfassbare Information durch Verfärbung abzubilden. Diese umfasst zumindest einen Farbbildner, einen Farbentwickler und Bindemittel.A thermosensitive layer is understood to mean a coating layer which is suitable for imaging visually detectable information by discoloration on exposure to heat, in particular contact with a heatable writing head. This comprises at least a color former, a color developer and a binder.
Vorrichtungen zur Erzeugung von beschichteten Papier,- Karton- oder anderen Faserstoffbahnen mit mindestens einer thermosensitiven Schicht in Form von Thermopapieren durch Auftrag eines flüssigen oder pastösen thermosensitiven
Auftragsmediums auf eine Trägerbahn mittels eines Vorhangauftragswerkes sind beispielhaft aus
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La papeterie 275, Avril-Mai 2006, S. 6-14 -
Revue de Papier Carton No. 85, Fevrier-Mars 2006, S. 34-37
Application medium on a carrier web by means of a curtain applicator are exemplary
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La papeterie 275, Avril-Mai 2006, pp. 6-14 -
Revue de Papier Carton no. 85, Fevrier-Mars 2006, pp. 34-37
Der Erfindung liegt daher die Aufgabe zugrunde, eine Vorrichtung zur Bereitstellung von beschichteten Papier,- Karton- oder anderen Faserstoffbahnen, insbesondere in Form von Thermopapieren derart weiterzuentwickeln, dass die Nachteile vermieden werden. Die Vorrichtung soll durch einen konstruktiv einfachen Aufbau mit geringer Komponentenanzahl charakterisiert sein und geeignet sein, eine Trägerbahn sowohl einseitig mehrfach, insbesondere vielfach Es soll noch auf die
Aus der
Aus der
Die erfindungsgemäße Lösung ist durch die Merkmale der Ansprüche 1 (Vorrichtung) und 14 (Verfahren) charakterisiert. Vorteilhafte Ausgestaltungen sind jeweils in den Unteransprüchen beschrieben.The solution according to the invention is characterized by the features of claims 1 (device) and 14 (method). Advantageous embodiments are described in each case in the subclaims.
Eine Vorrichtung zur Erzeugung von beschichteten Papier,- Karton- oder anderen Faserstoffbahnen mit mindestens einer thermosensitiven Schicht als Funktionsschicht durch Auftragen eines thermosensitiven Auftragsmediums auf eine Trägerbahn mittels einer eine Funktionsschicht bildenden Einheit, umfassend eine Auftragseinrichtung und eine Trockenstrecken, ist dadurch gekennzeichnet, dass die erste Funktionsschicht bildende Einheit eine Auftragseinrichtung in Form eines Mehrlagen- Vorhangauftragswerkes mit mindestens einer Abgabedüse und eine nachgeordnete Trockenstrecke umfasst und die zweite Funktionsschicht bildende Einheit ebenfalls eine Auftragseinrichtung in Form eines Mehrlagen-Vorhangauftragswerkes mit mindestens einer Abgabedüse und eine nachgeordnete Trockenstrecken umfasst, wobei ein erster Bahnführungsweg unter Einbeziehung der Auftragseinrichtung der zweiten Funktionsschicht bildenden Einheit sowie ein zweiter Bahnführungsweg und Mittel zur Umgehung der Auftragseinrichtung vorgesehen sind. Die Mittel zur Umgehung der Auftragseinrichtung umfassen dazu am einfachsten Fall Leit- und/oder Führungselemente für die Führung der Trägerbahn, die derart angeordnet und ausgeführt sind, geeignet zu sein, eine Verzweigung in der Bahnführung hinter der ersten Funktionsschicht bildenden Einheit und vor der Auftragseinrichtung der zweiten Funktionsschicht bildenden Einheit unter Ausbildung des ersten Bahnführungsweges über die Auftragseinrichtung und des zweiten Bahnführungsweges in Form eines Bypasses zur Auftragseinrichtung und eine Zusammenführung der beiden Bahnführungswege zu erzeugen.A device for producing coated paper, board or other fibrous webs with at least one thermosensitive layer as a functional layer by applying a thermosensitive coating medium on a carrier web by means of a functional layer forming unit comprising an applicator and a drying sections, characterized in that the first Functional layer forming unit comprises an applicator in the form of a multi-layer curtain applicator with at least one dispensing nozzle and a downstream drying section and the second functional layer forming unit also comprises an applicator in the form of a multi-layer curtain applicator with at least one dispensing nozzle and a downstream drying sections, wherein a first Bahnführungsweg below Including the applicator of the second functional layer-forming unit and a second web guide path and means for bypassing the applicator are provided. The means for bypassing the applicator device to include the easiest case guide and / or guide elements for guiding the carrier web, which are arranged and designed to be suitable, a branch in the web guide behind the first functional layer-forming unit and before the application device of Forming second functional layer forming unit to form the first Bahnführungsweges on the applicator and the second Bahnführungsweges in the form of a bypass to the applicator and a merger of the two web guide paths.
Die erfindungsgemäße Vorrichtung ist durch das Vorsehen lediglich zweier Funktionsschichten bildender Einheiten charakterisiert, die durch die intelligente Anordnung und Steuerung ihrer Betriebsweisen geeignet sind, eine Vielzahl unterschiedlicher Arten einseitig oder beidseitig einfach oder mehrfach beschichteter Papier,- Karbon- oder andere Faserstoffbahhen mit geringem Aufwand zu erzeugen, frei von einer Umrüstung der Vorrichtung. Dadurch besteht die Möglichkeit einer zeitnahen Umstellung unter optimaler Ausnutzung der einzelnen Komponenten der einzelnen Funktionsschichten bildenden Einheiten.The device according to the invention is characterized by the provision of only two functional layers forming units, which are suitable by the intelligent arrangement and control of their operations to produce a variety of different types of single or multiple coated one-sided or double-sided paper, carbon or other Faserstoffbahhen with little effort , free from a conversion of the device. This exists the possibility of a timely change with optimal utilization of the individual components of the individual functional layers forming units.
Dabei ergeben sich bei entsprechender Bahnführung und Aktivierung der einzelnen Funktionskomponenten der Funktionsschicht bildenden Einheit bereits in dieser Grundausführung eine Vielzahl von möglichen, unterschiedlich beschichteten Papier,- Karton- oder andere Faserstoffbahnen. So kann unter vollständiger Deaktivierung der zweiten Funktionsschicht bildenden Einheit zumindest eine einseitig einfach beschichtete Materialbahn erzeugt werden, indem das Vorhangauftragswerk der ersten Funktionsschicht bildenden Einheit und die nachfolgende Trockenstrecke aktiviert werden. Wird zusätzlich auf die erste Schicht unmittelbar eine weitere Schicht aufgetragen, wird zur Erzielung des erforderlichen Trockengrades die Trägerbahn über die Trockenstrecke der zweiten Funktionsschicht bildenden Einheit geführt, so dass eine einseitig doppelt beschichtete Materialbahn unter Ausnutzung der Trockenkapazität der zweiten Funktionsschicht bildenden Einheit erzeugbar ist. Dazu kann die Trägerbahn entweder bei deaktivierter Auftragseinrichtung der zweiten Funktionsschicht bildenden Einheit über den ersten Bahnführungsweg innerhalb dieser geführt werden oder über den zweiten Bahnführungsweg direkt zur Trockenstrecke der zweiten Funktionsschicht bildenden Einheit. Wird nunmehr zusätzlich noch die Auftragseinrichtung der zweiten Funktionsschicht bildenden Einheit aktiviert und die Trägerbahn über den ersten Bahnführungsweg innerhalb dieser geführt, kann je nach Anordnung und Bahnführung zwischen der ersten und zweiten Funktionsschicht bildenden Einrichtung entweder eine Beschichtung der auf die Rückseite der Trägerbahn oder aber eine weitere dritte Schicht auf die gleiche Seite aufgetragen werden. Im zuletzt genannten Fall ist jedoch die Trockenkapazität der Trockenstrecke der ersten Funktionsschicht bildenden Einheit auf den zweifachen Auftrag auszulegen, so dass der erforderliche Trockengehalt der Beschichtung vor dem Auftrag der weiteren dritten Schicht erreicht wird.In this case, with a corresponding web guide and activation of the individual functional components of the functional layer-forming unit, a multiplicity of possible, differently coated paper, board or other fibrous webs already result in this basic design. Thus, with complete deactivation of the second functional layer-forming unit, at least one material web coated on one side can be produced by activating the curtain application unit of the first functional layer-forming unit and the subsequent drying section. If, in addition, a further layer is applied directly to the first layer, the carrier web is guided over the drying section of the second functional layer-forming unit so that a single-side double-coated material web can be produced by utilizing the drying capacity of the second functional layer-forming unit. For this purpose, the carrier web can be guided either with deactivated application device of the second functional layer-forming unit via the first web guide path within this or via the second Bahnführungsweg directly to the drying section of the second functional layer-forming unit. If now additionally the application device of the second functional layer-forming unit is activated and the carrier web guided over the first Bahnführungsweg within this, depending on the arrangement and web guide between the first and second functional layer-forming device either a coating on the Back of the carrier web or another third layer can be applied to the same side. In the latter case, however, the drying capacity of the drying section of the first functional layer-forming unit is to be designed for twice the order, so that the required dry content of the coating is achieved before the application of the further third layer.
Die Auftragseinrichtung und die Trockenstrecke in einer Funktionsschicht bildenden Einheit sind derart ausgeführt und angeordnet, dass die Trägerbahn innerhalb zumindest der ersten, vorzugsweise auch der zweiten Funktionsschicht bildenden Einheit frei von einem Richtungswechsel (Umkehr der eingeschlagenen Kurvenrichtung) in Längsrichtung der Vorrichtung betrachtet geführt ist, wodurch gewährleistet ist, dass auf jeden Fall die beschichtete Oberfläche der nachgeordneten Trocknung ausgesetzt wird.The application device and the drying section in a functional layer-forming unit are designed and arranged such that the carrier web is guided within at least the first, preferably also the second functional layer forming unit free from a change of direction (reversal of the direction taken curve) in the longitudinal direction of the device considered it is ensured that in any case the coated surface is subjected to secondary drying.
Bezüglich der Anordnung und Ausrichtung der Komponenten der Funktionsschichten bildenden Einheiten zueinander bestehen grundsätzlich zwei Möglichkeiten. Gemäß einer ersten Ausführung sind diese vorzugsweise in einer gemeinsamen horizontalen Ebene, d.h. frei von Versatz zueinander in vertikaler Richtung angeordnet. Gemäß einer zweiten Ausführung erfolgt die Anordnung mit Versatz in vertikaler Richtung zueinander. Die erste Ausführung bildet eine hinsichtlich der Erstreckung in Höhenrichtung sehr kompakte Einheit, während die zweite Ausführung eine Anpassung an Bauraumgegebenheiten erlaubt.With regard to the arrangement and alignment of the components of the functional layer-forming units to each other, there are basically two possibilities. According to a first embodiment, these are preferably in a common horizontal plane, i. arranged offset from each other in the vertical direction. According to a second embodiment, the arrangement with offset in the vertical direction to each other. The first embodiment forms a very compact in terms of extent in the height direction unit, while the second embodiment allows adaptation to space conditions.
Auch die Anordnung der einzelnen Funktionsschichten bildenden Einheiten kann verschiedenartig erfolgen. Gemäß einer ersten besonders vorteilhaften Ausführungsform erfolgt die Anordnung der Funktionsschichten bildenden Einheiten in Durchlaufrichtung der Trägerbahn betrachtet derart hintereinander, dass die Führungsrichtung der Trägerbahn im Verbindungsbereich zwischen den beiden Funktionsschichten bildenden Einheiten durch zumindest einen Richtungswechsel in Längsrichtung der Vorrichtung betrachtet charakterisiert ist. Der vorgesehene Richtungswechsel, insbesondere eine schlaufenartige Führung ermöglicht eine Anordnung der Funktionsschicht bildenden Einrichtungen in vertikal zueinander versetzten Ebenen, wobei der Versatz in Längsrichtung der Vorrichtung zwischen den beiden Funktionsschichten bildenden Einheiten minimiert werden kann. Die erste Ausführungsform ist dadurch durch einen hohen Grad an Kompaktheit in Längsrichtung bei gleichzeitiger optimaler Ausnutzung von Bauraum in vertikaler Richtung charakterisiert. In einer besonders vorteilhaften Weiterentwicklung der zweiten Ausführung erfolgt die Anordnung der zweiten Funktionsschicht bildenden Einheit räumlich in Längsrichtung der Vorrichtung betrachtet vollständig im Bereich der Erstreckung der ersten Funktionsschicht bildenden Einheit.The arrangement of the individual functional layers forming units can be done in various ways. According to a first particularly advantageous embodiment, the arrangement of the functional layer-forming units in the direction of passage of the carrier web takes place behind one another such that the guide direction of the carrier web in the connecting region between the two functional layer-forming units is characterized by at least one change of direction in the longitudinal direction of the device. The intended direction change, in particular a loop-like leadership allows an arrangement of the functional layer-forming devices in vertically offset planes, wherein the offset in the longitudinal direction of the device between the two functional layer-forming units can be minimized. The first embodiment is characterized by a high degree of compactness in the longitudinal direction with simultaneous optimal utilization of space in the vertical direction. In a particularly advantageous further development of the second embodiment, the arrangement of the unit forming the second functional layer spatially in the longitudinal direction of the device takes place completely in the region of the extension of the first functional layer-forming unit.
Gemäß einer zweiten Ausführungsform sind die beiden Funktionsschichten bildenden Einheiten derart ausgebildet und in Längsrichtung der Vorrichtung betrachtet hintereinander angeordnet, dass die Führung der Trägerbahn in Längsrichtung der Vorrichtung frei von einer Umkehr der eingeschlagenen Kurvenrichtung ist.According to a second embodiment, the two functional layer-forming units are formed and arranged one behind the other viewed in the longitudinal direction of the device, that the guidance of the carrier web in the longitudinal direction of the device is free from a reversal of the taken curve direction.
Vorzugsweise sind die beiden Funktionsschichten bildenden Einheiten in einer horizontalen Ebene angeordnet.Preferably, the two functional layer-forming units are arranged in a horizontal plane.
Gemäß einer Weiterentwicklung ist die erste und die zweite Funktionsschicht bildende Einheit in entgegengesetzten Richtungen ausgerichtet. Dabei wird die Trägerbahn zwischen den beiden Funktionsschicht bildenden Einheiten ohne weitere Zwischenschaltung einer Bahnwendevorrichtungen derart geführt, dass diese zwischen diesen, insbesondere gegenüber den jeweiligen Auftragseinrichtungen der einzelnen Funktionsschicht bildenden Einheit eine Umkehr der Ausrichtung ihrer Ober- und Unterseite erfährt. Die Orientierungsänderung der Trägerbahnseiten gegenüber den jeweiligen Auftragseinrichtungen der einzelnen Funktionsschichten bildenden Einheiten erfolgt im einfachsten Fall über Mittel zur Richtungsänderung in der Bahnführung bezogen auf die Längsrichtung der Vorrichtung, insbesondere die entsprechende Anordnung von Bahnführungs- und Leitwalzen.According to a further development, the first and the second functional layer-forming unit are aligned in opposite directions. In this case, the carrier web is guided between the two functional layer-forming units without further interposition of a web turning devices such that they undergo a reversal of the orientation of their top and bottom between these, in particular with respect to the respective applicators of the individual functional layer forming unit. The orientation change of the carrier web sides with respect to the respective application devices of the individual functional layer-forming units is in the simplest case via means for changing the direction of the web guide with respect to the longitudinal direction of the device, in particular the corresponding arrangement of web guiding and guide rollers.
Für die erfindungsgemäße Führung der Trägerbahn über die zweite Funktionsschicht bildende Einrichtung sind grundsätzlich zwei Grundausführungen denkbar. Dabei kann die Trockenstrecke der zweiten Funktionsschicht bildenden Einheit gemäß einer ersten Ausführung entweder den Mitteln zur Umgehung der Auftragseinrichtung der zweiten Funktionsschicht bildenden Einheit, insbesondere Bypass nachgeordnet oder aber gemäß einer zweiten Ausführung im Bypass angeordnet werden. Die Mittel zur Bahnführung in diesen Bereichen sind dabei derart ausgebildet und angeordnet, dass diese gemäß der ersten Ausführung eine Führung der Trägerbahn durch die zweite Funktionsschicht bildende Einheit unabhängig davon, ob die Trägerbahn über die Auftragseinrichtung und nachfolgend die Trockenstrecke oder aber unter Umgehung der Auftragseinrichtung über die Trockenstrecke geführt wird, immer in der gleichen Richtung erlauben. In der zweiten Ausführung der Anordnung im Bypass wird die Trockenstrecke in den unterschiedlichen Betriebsweisen, die durch die unterschiedlichen Arten der Führung der Trägerbahn über die Auftragseinrichtung oder unter Umgehung dieser charakterisiert sind, in entgegengesetzter Richtung durchlaufen. Dementsprechend kann die erste Ausführung in besonders bauraumsparender Weise ausgestaltet werden, indem die beiden Funktionsschichten bildenden Einheiten in vertikaler Richtung zueinander versetzt angeordnet sind, wobei die Lage von Auftragseinrichtung und Trockenstrecke zwischen diesen in Längsrichtung der Vorrichtung vertauscht ist. Die zweite Ausführung erlaubt die Anordnung von Auftragseinrichtung und Trockenstrecke der zweiten Funktionsschicht bildenden Einheit in vertikal versetzten Ebenen frei von Versatz in Längsrichtung zueinander.For the guidance according to the invention of the carrier web via the second functional layer-forming device, basically two basic embodiments are conceivable. In this case, according to a first embodiment, the drying section of the second functional layer-forming unit can either be arranged downstream of the means for bypassing the application device of the second functional layer-forming unit, in particular by-pass or, according to a second embodiment, in the bypass. The means for web guide in these areas are designed and arranged such that these according to the first embodiment, a guide of the carrier web through the second functional layer forming unit regardless of whether the carrier web on the applicator and subsequently the drying line or bypassing the applicator via the drying section is guided, always allow in the same direction. In the second embodiment of the arrangement in the bypass, the drying section in the different modes, which are characterized by the different ways of guiding the carrier web on the applicator or bypassing this, in the opposite direction. Accordingly, the first embodiment can be configured in a particularly space-saving manner by the two functional layers forming units are arranged offset from one another in the vertical direction, wherein the position of applicator and drying line between them in the longitudinal direction of the device is reversed. The second embodiment allows the arrangement of application device and drying section of the second functional layer-forming unit in vertically offset planes free of offset in the longitudinal direction of each other.
Die Auftragseinrichtung der Funktionsschicht bildenden Einheiten umfasst ein Mehrlagen- Vorhangauftragswerk, welches einen Auftrag von Auftragsmedium in Form eines an einer Abrisskante erzeugten und in Richtung der Trägerbahn im freien Fall übergehenden ein- oder mehrschichtigen Auftragsmedienvorhanges erlaubt. Das Vorhangauftragswerk umfasst dazu zumindest eine, sich in Breitenrichtung der Trägerbahn erstreckende Auftragsdüse, die über zumindest eine Auftragsmedienzufuhr mit einem Auftragsmedienbereitstellungssystem verbunden ist. Die Düse bzw. das Vorhangauftragswerk kann in bekannter Weise als Schlitzdüse (slot die) oder Gleitschichtdüse (slide die) ausgebildet werden. Hiermit ist der gleichzeitige Auftrag von mindestens zwei Schichten mit einer Einrichtung möglich.The application device of the functional layer-forming units comprises a multi-layer curtain applicator, which allows an application of application medium in the form of a single or multi-layer application media curtain produced at a trailing edge and moving in the direction of the carrier web in free fall. For this purpose, the curtain applicator comprises at least one applicator nozzle extending in the width direction of the carrier web, which has at least one application media feed with an application media supply system connected is. The nozzle or the curtain applicator can be formed in a known manner as a slot die or slide die. This allows the simultaneous application of at least two layers with one device.
In einer besonders vorteilhaften Weiterentwicklung können zum schnellen Wechsel zwischen unterschiedlichen aufzutragenden Schichtarten mittels eines Vorhangauftragswerkes diesem zumindest zwei Auftragsmedienbereitstellungssysteme zugeordnet werden, auf die wechselweise in Abhängigkeit der Anforderungen an das Auftragsmedium zugegriffen werden kann, beispielsweise durch die wahlweise Kopplung der Auftragsmedienzufuhr mit den unterschiedlichen Auftragsmedienbereitstellungssystemen.In a particularly advantageous further development, at least two application media provision systems can be assigned to the rapid change between different types of layer to be applied by means of a curtain applicator, which can be accessed alternately depending on the requirements of the application medium, for example by the optional coupling of the application media supply with the different application media delivery systems.
Die einzelne Trockenstrecke einer Funktionsschicht bildenden Einheit umfasst wenigstens eine Trockeneinrichtung, insbesondere in Form einer kontaktlosen Trocknung, wie z.B. einer Heißlufttrockeneinrichtung. Diese kann gas- oder dampfbeheizt sein. Andere Trockensysteme, wie Infrarotstrahler und Kontakttrockner, wie Trockenzylinder, sind ebenfalls möglich.The single drying section of a functional layer-forming unit comprises at least one drying device, in particular in the form of a contactless drying, such as e.g. a hot air dryer. This can be gas or steam heated. Other drying systems, such as infrared radiators and contact dryers, such as drying cylinders, are also possible.
Die Trockenstrecke ist als Funktion des zu erzielenden Trockengehaltes der mit der vorgeschalteten Auftragseinrichtung aufgetragenen Schicht ausgelegt. Die Trockenstrecke ist vorzugsweise gerade, kann jedoch auch durch einen gekrümmten oder anderen Verlauf charakterisiert sein. Die Trocknung kann einseitig oder beidseitig erfolgen, wobei auch Ausführungen mit wahlweise ein- oder beidseitigem Betrieb denkbar sind.The drying section is designed as a function of the dry content of the layer applied with the upstream application device. The drying section is preferably straight, but may also be characterized by a curved or other course. The drying can be done on one side or on both sides, with designs with either one or two-sided operation are conceivable.
Zur kontinuierlichen Betriebsweise wird die Trägerbahn in der Regel von einer Materialbahnrolle abgerollt und durch die Vorrichtung mittels entsprechender Zugeinrichtungen gezogen. Im Anschluss an die zweite Funktionsschicht bildende Einheit erfolgt die Aufwicklung der beschichteten Faserstoffbahn an einer Aufwickeleinrichtung. Vorzugsweise ist jeder Funktionsschicht bildenden Einheit eine Zugeinrichtung zugeordnet.For continuous operation, the carrier web is usually unrolled from a web roll and pulled through the device by means of appropriate pulling devices. Subsequent to the second functional layer-forming unit, the winding of the coated fibrous web takes place on a take-up device. Preferably, each functional layer-forming unit is associated with a pulling device.
Als Funktionsschichten auftragbar sind neben thermosensitiven Schichten auch andere Schichten, beispielsweise Deckschichten in Form von Schutzschichten. Letztere sind durch ein geringeres Flächengewicht im Bereich von 0,5 bis 6 g/m2 als die thermosensitiven Schichten, deren Flächengewicht vorzugsweise im Bereich von 1 bis 7 g/m2 gewählt wird, charakterisiert.Can be applied as functional layers in addition to thermosensitive layers and other layers, such as cover layers in the form of protective layers. The latter are characterized by a lower basis weight in the range of 0.5 to 6 g / m 2 than the thermosensitive layers, the basis weight of which is preferably selected in the range of 1 to 7 g / m 2 .
In einer vorteilhaften Weiterentwicklung sind im Verbindungsbereich zwischen den beiden Funktionsschichten bildenden Einheiten, insbesondere der ersten Funktionsschicht bildenden Einheit und der Auftragseinrichtung der zweiten Funktionsschicht bildenden Einheit eine Bahnwendevorrichtung unter Ausbildung eines weiteren dritten Bahnführungsweges und Mittel zur Umgehung der Bahnwendevorrichtung zwischen beiden Funktionsschichten bildenden Einheiten vorgesehen. Dadurch kann je nach Ausführungsform eine weitere Möglichkeit des Orientierungswechsels der Ober- und Unterseite der Trägerbahn erzielt werden, die in Kombination mit den weiteren Ansteuermöglichkeiten der einzelnen Funktionsschichten bildenden Einheiten den Auftrag zusätzlicher Auftragsschichten erlaubt, wodurch Vielfachschichten auf einer Seite der Trägerbahn oder aber auch auf beiden Seiten erzeugbar sind.In an advantageous further development, in the connecting region between the two functional layers forming units, in particular the first functional layer-forming unit and the applicator of the second functional layer-forming unit, a web turning device is provided to form a further third web guide path and means for bypassing the web turning device between two functional layers forming units. As a result, depending on the embodiment, a further possibility of orientation change of the top and bottom of the carrier web can be achieved which, in combination with the further control possibilities of the individual functional layer-forming units, allows the application of additional application layers, whereby multiple layers on one side of the carrier web or else on both Pages are generated.
In einer weiteren vorteilhaften Weiterentwicklung umfasst auch die zweite Auftragseinrichtung der zweiten Funktionsschicht bildenden Einheit ein Mehrlagen- Vorhangauftragswerk. Dadurch ist es möglich, auch mit der zweiten Funktionsschicht bildenden Einheit mehrere gewünschte verschiedene Schichten zu erzeugen.In a further advantageous development, the second application device of the second functional layer-forming unit also comprises a multi-layer curtain application unit. This makes it possible to produce a plurality of desired different layers even with the second functional layer-forming unit.
Die erfindungsgemäße Lösung ist in besonders vorteilhafter Weise für die Erzeugung von Thermopapieren geeignet. Die Erfindung kann jedoch auch für andere in Bahnform vorliegende und als Aufzeichnungsmedien geeignete Materialien, wie beispielsweise Folien oder textile Materialien zum Einsatz gelangenThe solution according to the invention is particularly suitable for the production of thermal paper. However, the invention can also be applied to other web-form materials suitable as recording media, such as films or textile materials
Die erfindungsgemäße Vorrichtung ist durch Steuerung der Bahnführung und der einzelnen Komponenten der Funktionsschicht bildenden Einheiten in unterschiedlichen Betriebsweisen betreibbar. In einer ersten Betriebsweise wird die Trägerbahn nacheinander unter Ausbildung zumindest einer ersten Schicht durch die erste Funktionsschicht bildende Einheit und einer zweiten Schicht durch die zweite Funktionsschicht bildende Einheit geführt, während in einer weiteren zweiten Betriebsweise die Trägerbahn nacheinander unter Ausbildung zumindest einer ersten Schicht durch die erste Funktionsschicht bildende Einheit und frei von einem Auftrag durch die zweite Funktionsschicht bildende Einheit geführt wird. Dadurch können je nach Ausführung der Vorrichtung bereits einseitig einfach oder beidseitig einfach oder einseitig mehrfach beschichtete Trägerbahnen erzeugt werden. Wird vorzugsweise die Trägerbahn in der zweiten Betriebsweise unter Ausbildung zumindest zweier Schichten durch die erste Funktionsschicht bildende Einheit und unter Ausnutzung der Trockenkapazität der zweiten Funktionsschicht bildenden Einheit über die Trockenstrecke der zweiten Funktionsschicht bildenden Einheit geführt , kann die Vorrichtung besonders energieeffizient betrieben werden. Werden in beiden Funktionsschicht bildenden Einheiten zumindest zwei Schichten aufgetragen, können in einfacher Weise einseitig mehrfach oder beidseitig mehrfach beschichtete Papier,- Karton- oder andere Faserstoffbahnen erzeugt werden.The device according to the invention can be operated by controlling the web guide and the individual components of the functional layer-forming units in different operating modes. In a first mode of operation, the carrier web is guided successively forming at least one first layer through the first functional layer forming unit and a second layer through the second functional layer forming unit, while in a further second mode the carrier web successively forming at least a first layer through the first Functional layer-forming unit and free of an order by the second functional layer-forming unit is performed. As a result, depending on the design of the device, one-sided or single-sided or multiply coated carrier webs can be produced on one side. If the carrier web is preferably guided over the drying section of the second functional layer-forming unit in the second mode of operation by forming at least two layers through the first functional layer-forming unit and utilizing the drying capacity of the second functional layer-forming unit, the device can be operated particularly energy-efficiently. If at least two layers are applied in two functional layer-forming units, multiply coated or multiply coated paper, board or other fibrous webs can be produced in a simple manner on one side.
Die erfindungsgemäße Lösung wird nachfolgend anhand von Figuren erläutert. Darin ist im Einzelnen Folgendes dargestellt:
- Figuren 1a bis 1g
- verdeutlichen anhand eines Axialschnittes den Aufbau unterschiedlicher Arten von beschichteten Papier,- Karton- oder anderen Faserstoffbahnen;
- Figur 2a
- verdeutlicht in schematisiert vereinfachter Darstellung den Grundaufbau und die Grundfunktion einer erfindungsgemäßen Vorrichtung zur Bereitstellung beschichteter Papier,- Karton- oder anderer Faserstoffbahnen mit mindestens einer Funktionsschicht gemäß einer
Figur 2b vorteilhaften Ausführungsform mit vertikal versetzt angeordneten Funktionsschichten bildenden Einheiten mit Anordnung der Trockenstrecke hinter der Zusammenführung; verdeutlicht in schematisiert vereinfachter Darstellung den Grundaufbau und die Grundfunktion einer erfindungsgemäßen Vorrichtung zur Bereitstellung beschichteter Papier,- Karton- oder andere Faserstoffbahnen mit mindestens einer Funktionsschicht gemäß einer vorteilhaften Ausführungsform mit vertikal versetzt angeordneten Funktionsschichten bildenden Einheiten mit Anordnung der Trockenstrecke der zweiten Einheit im Bypass zur Auftragseinrichtung; - Figuren 2c1 und 2c2
- verdeutlichen anhand von Signalflussbildern mögliche Betriebsweisen der Vorrichtungen gemäß der
Figuren 2a und 2b ; -
Figur 3 - verdeutlicht in schematisiert vereinfachter Darstellung eine mögliche konstruktive Ausführung gemäß
Figur 2b ; -
Figur 4 - verdeutlicht in schematisiert vereinfachter Darstellung eine mögliche konstruktive Ausführung gemäß
Figur 2a ; -
Figur 5 - verdeutlicht in schematisiert vereinfachter Darstellung eine vorteilhafte Weiterentwicklung einer Ausführung gemäß
Figur 4 mit Bahnwendevorrichtung; -
Figuren 6a bis 6d - verdeutlichen anhand von Signalflussbildern die Betriebsweise einer Vorrichtung gemäß
Figur 5 zur Erzeugung einer einseitig beschichteten Materialbahn; -
Figuren 7a bis 7c - verdeutlichen anhand von Signalflussbildern die Betriebsweise einer Vorrichtung gemäß
Figur 5 zur Erzeugung einer beidseitig beschichteten Materialbahn.
- FIGS. 1a to 1g
- illustrate by means of an axial section the structure of different types of coated paper, cardboard or other fibrous webs;
- FIG. 2a
- illustrates in a schematic simplified representation of the basic structure and the basic function of a device according to the invention for providing coated paper, cardboard or other fibrous webs with at least one functional layer according to a
FIG. 2b advantageous embodiment with vertical staggered functional layers forming units with arrangement of the drying section behind the merge; illustrates in a schematic simplified representation of the basic structure and the basic function of a device according to the invention for providing coated paper, cardboard or other fibrous webs with at least one functional layer according to an advantageous embodiment with vertically staggered functional layers forming units with arrangement of the drying section of the second unit in the bypass to the applicator ; - Figures 2c1 and 2c2
- illustrate possible modes of operation of the devices according to the
FIGS. 2a and 2b ; - FIG. 3
- illustrates in schematic simplified representation of a possible structural design according to
FIG. 2b ; - FIG. 4
- illustrates in schematic simplified representation of a possible structural design according to
FIG. 2a ; - FIG. 5
- illustrates in schematic simplified representation of an advantageous development of an embodiment according to
FIG. 4 with web turning device; - FIGS. 6a to 6d
- illustrate the operation of a device according to signal flow images
FIG. 5 for producing a single-sided coated material web; - FIGS. 7a to 7c
- illustrate the operation of a device according to signal flow images
FIG. 5 for producing a material web coated on both sides.
Die
Unter Funktionsschicht wird eine Schicht verstanden, welche zur Erzielung von zusätzlichen Funktionen oder Eigenschaften gleichmäßig über die gesamte Oberfläche der Bahn aufgetragen wurde.Functional layer is understood to mean a layer which has been applied uniformly over the entire surface of the web for the purpose of achieving additional functions or properties.
Die nachfolgende Beschreibung bezieht sich auf die Bereitstellung von Thermopapieren, bei denen die Trägerbahn T von der Faserstoffbahn F gebildet wird, die im Anschluss daran entweder on- oder offline einem Veredelungsprozess unterzogen wird.The following description relates to the provision of thermal paper in which the carrier web T is formed by the fibrous web F, which is subsequently subjected to a refining process either on- or offline.
Die beschichtete Bahn 10 ist dabei in einem Koordinatensystem durch eine Erstreckung in Längs- und Breitenrichtung charakterisiert, welche der X- und Y-Richtung entspricht sowie durch eine Höhe in Z-Richtung. Der Axialschnitt verdeutlicht dabei die Darstellung in der YZ-Ebene.The
Zur Herstellung von Thermopapier, unter welchem eine Papierbahn mit zumindest einer wärmeempfindlichen Schicht verstanden wird, welche sich bei sehr kurzem Kontakt mit einem beheizten Element verfärbt, wird auf die Ober- und/oder Unterseite 2, 3 eine Funktionsschicht in Form einer thermosensitiven Schicht aufgetragen. Die
Das Flächengewicht der thermosensitiven Schicht 4 beträgt im Endzustand, d.h. im getrockneten Zustand im Bereich zwischen 1 und 7 g/m2, besonders bevorzugt 2 bis 5 g/m2.The weight per unit area of the
Die
Die
Zeigen die
Um die in den
Die
Entsprechend der erfindungsgemäßen Ausführung sind die zum mehrlagigen Beschichten geeigneten Auftragsdüsen frei von einer Zwischentrocknung der Trägerbahn.According to the embodiment of the invention, the application nozzles suitable for multilayer coating are free of intermediate drying of the carrier web.
Wenn weniger Schichten aufgetragen werden sollen als Auftragsdüsen bzw. Auftragsschlitze vorhanden sind, werden die nicht benötigten Düsen bzw. Schlitze nicht mit Auftragsmedium beaufschlagt, also nicht aktiviert.If fewer layers are to be applied than application nozzles or job slots are present, the unused nozzles or slots are not applied with application medium, that is not activated.
In einer besonders vorteilhaften Ausführung gemäß der Erfindung umfasst zumindest die in Bewegungsrichtung der Trägerbahn T erste Funktionsschicht bildende Einheit 7 ein Mehrlagen- Vorhangauftragswerk mit zumindest zwei derartigen, unmittelbar hintereinander angeordneten und in Trägerbahndurchlaufrichtung an dieser wirksam werdende Auftragsdüsen. Mit diesem Auftragswerk sind ebenfalls mehrere Schichten gleichzeitig auftragbar.In a particularly advantageous embodiment according to the invention, at least the first functional
Die zweite in Bewegungsrichtung der Trägerbahn T angeordnete Funktionsschicht bildende Einheit 8 umfasst ebenfalls eine derartige Auftragseinrichtung A2, in Form eines Mehrlagen- Vorhangauftragswerkes. Die Funktionsschicht bildende Einheit 7, 8 umfasst ferner zumindest eine Trockenstrecke TS1 beziehungsweise TS2 mit jeweils zumindest einer Trockeneinrichtung. Dabei ist die Trockenstrecke TS1 der ersten Funktionsschicht bildenden Einheit 7 dem Vorhangauftragswerk nachgeordnet. Erfindungsgemäß erfolgt die Anordnung der Trockenstrecke TS2 in einem Bahnführungszweig, der eine Umgehung der Auftragseinrichtung A2 ermöglicht. Dazu sind entsprechende Mittel 14 zur Umgehung der Auftragseinrichtung A2 der zweiten Funktionsschicht bildenden Einheit 8 vorgesehen, vorzugsweise in Form eines Bypasses. Zur Realisierung der Bypassfunktion sind unterschiedliche Bahnführungswege für die Trägerbahn T durch die Vorrichtung 1 möglich. Diese werden durch die Anordnung der einzelnen Elemente der die Funktionsschichten bildenden Einheiten 7 und 8 sowie entsprechender Leit- und Führungswalzen realisiert. Die einzelnen Bahnführungsbereiche lassen sich dabei im Wesentlichen auf zumindest zwei reduzieren. Ein erster Bahnführungsweg ist dabei durch die Führung innerhalb der ersten Funktionsschicht bildenden Einheit 7 charakterisiert und mit I bezeichnet. Der zweite Bahnführungsweg ist durch die zweite Funktionsschicht bildenden Einheit 8 charakterisiert und mit II bezeichnet. Dieser kann in zumindest zwei Teilbereiche IIa, IIb unterteilt werden, wobei ein erster Bereich IIa die Führung der Trägerbahn T über die Auftragseinrichtung A2 beschreibt, während IIb einen weiteren Bahnführungsweg unter Umgehung von A2 beschreibt. Die Bahnführung weist dazu nach der ersten Funktionsschicht bildenden Einheit 7, in welcher der entsprechende Bahnführungsbereich mit I bezeichnet ist, eine Verzweigung 11 auf, welche den ersten Bahnführungsweg IIa über die Auftragseinrichtung A2 und den zweiten Bahnführungsweg IIb im Bypass zu dieser ermöglicht, wobei die beiden Bahnführungswege IIa und IIb in 13 zusammengeführt werden. Die Trockenstrecke TS2 ist dabei gemäß
Die Bahnführung zwischen der Abrolleinrichtung 9 und der Aufwickeleinrichtung 12 erfolgt gemäß der ersten Ausführungsform mit zumindest einem Richtungswechsel, das heißt, die einzelnen die Funktionsschichten bildenden Einheiten 7 und 8 sind vorzugsweise in vertikaler Richtung in versetzten Ebenen in der Vorrichtung 1 angeordnet. Beispielhaft ist dazu ein Koordinatensystem zur Verdeutlichung der einzelnen Richtungen angegeben. Die X-Richtung entspricht in der Regel der Längs- oder auch Maschinenrichtung, während die Y-Richtung die Breitenrichtung beschreibt und die Z-Richtung die Höhenrichtung. Erkennbar ist dabei, dass die einzelnen die Funktionsschichten bildenden Einheiten 7 und 8 in entgegengesetzter Richtung durchlaufen werden, das heißt für die Einheit 7 in positiver X-Richtung und die Einheit 8 in negativer X-Richtung. Aufgrund der Anordnung der Trockenstrecke TS2 in einem Bahnführungsbereich, welcher zur Umgehung der Auftragseinrichtung A2, insbesondere des Vorhangauftragswerkes geeignet ist, sind unterschiedliche Betriebsweisen der Vorrichtung 1 möglich. Diese werden durch die Führung der zu beschichtenden Trägerbahn T über die unterschiedlichen Bahnführungsbereiche I, IIa, IIb in unterschiedlichen Richtungen charakterisiert.The web guide between the unwinding
Die in der
Der Richtungswechsel der Bahnführung zwischen erster und zweiter Funktionsschicht bildender Einheit 7, 8 bewirkt eine Umkehrung der Ausrichtung der Ober- und Unterseite 2, 3, so dass in der zweiten Funktionsschicht bildenden Einheit 8 nunmehr die Unterseite 3 behandelt wird.The change in direction of the web guide between the first and second functional
Demgegenüber verdeutlicht
Die erfindungsgemäße Vorrichtung 1 ermöglicht unterschiedliche Betriebsweisen durch Ansteuerung der einzelnen Funktionseinheiten, insbesondere der Mehrlagen- Vorhangauftragswerke. Die
Die
Verdeutlichen die
Die
Die einzelnen Trockenstrecken TS1 und TS2 enthalten zumindest eine Trockeneinrichtung, vorzugsweise eine Mehrzahl von in Reihe geschalteten Trockeneinrichtungen HLT1.1 bis HLT1.3 und HLT2.1 bis HLT2.3, welche mit Heißluft betrieben werden, die gas- oder dampfbeheizt sind. Die in der
In einer weiteren Ausführung gemäß
Die in der
Das in den
Durch das in der zweiten Funktionsschicht bildenden Einheit 8 vorgesehene Mehrlagen- Vorhangsauftragswerk mit den Auftragsdüsen CC3, CC4 ergeben sich eine Vielzahl von Betriebsweisen, die für einseitig beschichtete Trägerbahnen T in den
Die
Die
Um nunmehr eine Mehrfachbeschichtung auf der Oberseite 2 vorsehen zu können, wird die Ausführung gemäß
Demgegenüber verdeutlicht die
Um in einer Weiterentwicklung eine beidseitig beschichtete Trägerbahn T mit einer Doppelschicht auf einer Seite zu erzielen, wird hier beispielhaft die erste Funktionsschicht bildende Einheit 7 aktiviert und im Nachgang zur thermosensitiven Schicht 4 die erforderliche Deckschicht 5 aufgetragen, wobei die beiden Schichten der Trockenstrecke TS1 zugeführt werden, über diese getrocknet und im Anschluss daran die Unterseite 3 durch die Auftragseinrichtung A2 der zweiten Funktionsschicht bildenden Einheit 8 beschichtet und über die Trockenstrecke TS2 getrocknet wird, wobei in dieser des Weiteren auch eine Trocknung der Mehrfachschicht an der Oberseite 2 erfolgt.In order to achieve, in a further development, a carrier web T coated on both sides with a double layer on one side, the first example is shown here by way of example Functional
Die
Die erfindungsgemäße Lösung verdeutlicht mit zwei Funktionsschichten bildenden Einheiten 7, 8 und deren intelligenter Verknüpfung sowie Ergänzung um weitere Funktionseinheiten unterschiedliche Arten von beschichteten Papier,- Karton- oder anderen Faserstoffbahnen 10, insbesondere von Trägerbahnen mit thermosensitiver Beschichtung 4, 6. Die erfindungsgemäße Lösung ist dabei nicht auf diese Ausführungen beschränkt. Die Grundkonfiguration geht dabei von zwei Funktionsschichten bildenden Einheiten 7, 8 aus, über die eine sehr große Anzahl an Mehrfachbeschichtungen erreicht werden kann. Dabei besteht als einziges Erfordernis die Anordnung der zweiten Funktionsschicht bildenden Einheit 8 derart in deren Ausführung, dass die Auftragseinrichtung A2 der zweiten Funktionsschicht bildenden Einheit im Bypass umgangen werden kann. Konstruktiv ergeben sich eine Vielzahl von Möglichkeiten. Aufgrund der erforderlichen unterschiedlichen Richtungen zur Zuordnung zu den einzelnen Seiten einer Trägerbahn T bietet sich jedoch eine Anordnung mit vertikalem Versatz im Bereich der axialen Erstreckung der ersten Funktionsschicht bildenden Einheit 7 für die zweite Funktionsschicht bildende Einheit 8 direkt an.The solution according to the invention with two functional
- 11
- Vorrichtungcontraption
- 22
- Oberseitetop
- 33
- Unterseitebottom
- 44
- thermosensitive Schichtthermosensitive layer
- 55
- Deckschichttopcoat
- 66
- thermosensitive Schichtthermosensitive layer
- 77
- erste Funktionsschicht bildende Einheitfirst functional layer-forming unit
- 88th
- zweite Funktionsschicht bildende Einheitsecond functional layer-forming unit
- 99
- Abrolleinrichtungunrolling
- 1010
- beschichtete Faserstoffbahncoated fibrous web
- 1111
- Verzweigungbranch
- 1212
- Aufwickeleinrichtungtakeup
- 1313
- Zusammenführungtogether
- 1414
- Mittel zur Umgehung der Auftragseinrichtung der zweiten Funktionsschicht bildenden EinheitMeans for bypassing the applicator of the second functional layer forming unit
- 1515
- BahnwendevorrichtungWeb turning device
- 1616
- Bypassbypass
- 1717
- Funktionsschichtfunctional layer
- 1818
- Funktionsschichtfunctional layer
- A1A1
- Auftragseinrichtungapplicator
- A2A2
- Auftragseinrichtungapplicator
- CC1CC1
- erste Auftragsdüse des Vorhangauftragwerkes der ersten Funktionsschicht bildenden Einheitfirst application nozzle of the curtain applicator of the first functional layer-forming unit
- CC2CC2
- zweite Auftragsdüse des Vorhangauftragwerkes der ersten Funktionsschicht bildenden Einheitsecond application nozzle of the curtain applicator of the first functional layer-forming unit
- CC3CC3
- erste Auftragsdüse des Vorhangauftragwerkes der zweiten Funktionsschicht bildenden Einheitfirst application nozzle of the curtain applicator of the second functional layer-forming unit
- CC4CC4
- zweite Auftragsdüse des Vorhangauftragwerkes der zweiten Funktionsschicht bildenden Einheitsecond application nozzle of the curtain applicator of the second functional layer-forming unit
- TS1TS1
- Trockenstreckedrying section
- TS2TS2
- Trockenstreckedrying section
- HLT1.1 - HLT1.3HLT1.1 - HLT1.3
- Trockeneinrichtungendrying machines
- HLT2.2 - HLT2.3HLT2.2 - HLT2.3
- Trockeneinrichtungendrying machines
- Z1 - Z3Z1 - Z3
- Zugeinrichtungendrawbars
- I ; IIa, IIIb, III, IVI; IIa, IIIb, III, IV
- BahnführungswegeWeb guide paths
- XX
- Längsrichtunglongitudinal direction
- YY
- Breitenrichtungwidth direction
- ZZ
- Höhenrichtungheight direction
Claims (15)
- Apparatus (1) for producing coated paper, board or other fibrous webs (10) with at least one thermosensitive layer (4, 6) as a functional layer by applying at least one thermosensitive application medium to a carrier web (T) by means of at least one functional-layer-forming unit (7, 8), comprising an applicator (A1, A2) and a drying system (TS1, TS2),
characterized in that
the first functional-layer-forming unit (7) comprises an applicator (A1) in the form of a multilayer curtain coater having at least one discharge nozzle (CC1, CC2) and a drying system (TS1) arranged downstream, and the second functional-layer-forming unit (8) comprises an applicator (A2) in the form of a multilayer curtain coater having at least one discharge nozzle (CC3, CC4) and a drying system (TS2) arranged downstream, a first web guide path (IIa) including the applicator (A2) of the second functional-layer-forming unit (8), and a second web guide path (IIb) and means (14) for bypassing the applicator (A2) being provided, wherein the means (14) for bypassing the applicator (A2) comprise leading and/or guide elements for guiding the carrier web (T), which are arranged and designed in such a way as to produce, and to be suitable for producing, a branch (11) in the web guidance after the first functional-layer-forming unit (7), forming the first web guide path (IIa) over the applicator (A2), and the second web guide path (IIb) in the form of a bypass to the applicator (A2) and a junction (13) of the two web guide paths (IIa, IIb). - Apparatus (1) according to Claim 1,
characterized in that
the drying system (TS2) of the second functional-layer-forming unit (8) is connected downstream of the means (14) for bypassing the applicator (A2). - Apparatus (1) according to Claim 2,
characterized in that
the means (14) for bypassing the applicator (A2) are arranged and designed in such a way that these are suitable to produce a branch (11) in the web guidance following the first functional-layer-forming unit (7) and a junction (13) of the latter before the drying system (TS2) of the second functional-layer-forming unit (8), and at least one pulling device (Z1, Z2) is provided, which is arranged downstream of the second drying system (TS2). - Apparatus (1) according to one of Claims 1 to 3,
characterized in that
the drying system (TS2) of the second functional-layer-forming unit (8) is arranged in the bypass, and the means (14) for web guidance are arranged and designed in such a way as to guide, and to be suitable for guiding, the carrier web (T) in mutually opposite directions through the drying system (TS2), forming at least one further web guide path (III). - Apparatus (1) according to Claim 4,
characterized in that
said apparatus comprises at least one pulling device (Z1), which is arranged before the applicator (A2) of the unit (8) forming the second functional layer and after the branch (11). - Apparatus (1) according to at least one of the preceding claims,
characterized in that
the applicator (A1, A2) and the drying system (TS1, TS2) in a functional-layer-forming unit (7, 8) are designed and arranged in such a way that the carrier web (T) is guided free of any reversal of the curve direction taken, as viewed in the longitudinal direction of the apparatus (1), within the unit (7, 8) forming individual functional layers. - Apparatus (1) according to Claim 6,
characterized in that
the applicator (A1, A2) and the drying system (TS1, TS2) in a functional-layer-forming unit (7, 8) are arranged in a horizontal plane. - Apparatus (1) according to Claim 6,
characterized in that
the applicator (A1, A2) and the drying system (TS1, TS2) in a functional-layer-forming unit (7, 8) are arranged in planes offset vertically in relation to each other. - Apparatus (1) according to at least one of the preceding claims,
characterized in that
the two units (7, 8) forming functional layers are arranged one after the other, as viewed in the longitudinal direction of the apparatus (1), and are designed and arranged in such a way that the carrier web (T) is guided in the longitudinal direction of the apparatus (1) in a manner free from any reversal of the curve direction taken. - Apparatus (1) according to Claim 8,
characterized in that
the two units (7, 8) forming functional layers are arranged in a horizontal plane. - Apparatus (1) according to at least one of the preceding claims,
characterized in that
in the connection between the first functional-layer-forming unit (7) and the applicator (A2) of the second functional-layer-forming unit (8) there is provided a bypass (16), in which a web turning apparatus (15) is arranged. - Apparatus (1) according to at least one of the preceding claims,
characterized in that
the application unit (A1, A2) in the form of the multilayer curtain coater comprises at least one applicator nozzle (CC1, CC2, CC3, CC4) which extends in the width direction of the carrier web (T) and is connected via at least one application medium feed to an application medium providing system. - Apparatus (1) according to Claim 12,
characterized in that
at least two application medium providing systems, which can be coupled up alternately, for different application media are assigned at least to the multilayer curtain coater, at least one application medium providing system containing a thermosensitive application medium. - Method for operating an apparatus (1) for producing a coated paper, board or other fibrous web (10) with at least one thermosensitive layer (4, 6) as a functional layer by applying at least one liquid or pasty thermosensitive application medium to a carrier web (T) according to one of Claims 1 to 13,
characterized in that
this apparatus can be operated by controlling the web guidance and individual components of the functional-layer-forming units (7, 8) in different operating modes, in a first operating mode the carrier web (T) being led successively through the first functional-layer-forming unit (7), forming at least one first layer, and through the second functional-layer-forming unit (8), forming at least one second layer, and, in a further, second operating mode, being led successively through the first functional-layer-forming unit (7), forming at least one first layer, and through the second functional-layer-forming unit (8), free of any application. - Method according to Claim 14,
characterized in that
in the second operating mode, the carrier web (T) is led through the first functional-layer-forming unit (7), forming at least two layers, and, utilizing the drying capacity of the second functional-layer-forming unit (8), is led over the drying system (TS2) of the second functional-layer-forming unit (8).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102008041422A DE102008041422A1 (en) | 2008-08-21 | 2008-08-21 | Apparatus for producing coated paper, board or other fibrous webs with at least one thermosensitive layer and method for operating such a device |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2157238A1 EP2157238A1 (en) | 2010-02-24 |
EP2157238B1 true EP2157238B1 (en) | 2011-08-17 |
Family
ID=41276560
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP09168032A Not-in-force EP2157238B1 (en) | 2008-08-21 | 2009-08-18 | Device for creating coated paper, cardboard or other strips of fibrous material with at least one thermo-sensitive layer and method for operating such a device |
Country Status (5)
Country | Link |
---|---|
US (1) | US20100055333A1 (en) |
EP (1) | EP2157238B1 (en) |
AT (1) | ATE520824T1 (en) |
DE (1) | DE102008041422A1 (en) |
ES (1) | ES2369173T3 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008041419A1 (en) * | 2008-08-21 | 2010-02-25 | Voith Patent Gmbh | Apparatus for producing coated paper, board or other fibrous webs with at least one thermosensitive layer and method for operating such a device |
DE102010029615A1 (en) * | 2010-06-02 | 2011-12-08 | Voith Patent Gmbh | Method for producing a coated, multilayer fibrous web |
DE202010016479U1 (en) | 2010-12-10 | 2011-02-17 | Voith Patent Gmbh | applicator |
CN112871529B (en) * | 2021-01-11 | 2021-12-17 | 温州医科大å¦é™„属第二医院(温州医科大å¦é™„属育英儿童医院) | Automatic atomization coating instrument |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4313628A1 (en) * | 1993-04-27 | 1993-09-30 | Voith Gmbh J M | Paper web coating assembly - has a deflection roller between two drying cylinders to bridge the gap if web is not to be treated |
DE4420242A1 (en) * | 1994-06-10 | 1995-01-05 | Voith Gmbh J M | Equipment for the alternative treatment of a running web |
DE20221952U1 (en) * | 2002-06-24 | 2009-08-20 | Voith Patent Gmbh | Apparatus for two-sided coating and drying of a material web, in particular of paper or cardboard |
US7563326B2 (en) * | 2002-06-24 | 2009-07-21 | Voith Paper Patent Gmbh | Device for coating and drying both sides of a material web of paper or board |
JP2005161153A (en) * | 2003-12-01 | 2005-06-23 | Voith Paper Patent Gmbh | Double coating apparatus |
DE102005028822A1 (en) * | 2005-06-22 | 2007-01-04 | Voith Patent Gmbh | Process for producing thermosensitive paper |
-
2008
- 2008-08-21 DE DE102008041422A patent/DE102008041422A1/en not_active Withdrawn
-
2009
- 2009-08-18 AT AT09168032T patent/ATE520824T1/en active
- 2009-08-18 US US12/542,907 patent/US20100055333A1/en not_active Abandoned
- 2009-08-18 EP EP09168032A patent/EP2157238B1/en not_active Not-in-force
- 2009-08-18 ES ES09168032T patent/ES2369173T3/en active Active
Also Published As
Publication number | Publication date |
---|---|
ATE520824T1 (en) | 2011-09-15 |
EP2157238A1 (en) | 2010-02-24 |
DE102008041422A1 (en) | 2010-02-25 |
US20100055333A1 (en) | 2010-03-04 |
ES2369173T3 (en) | 2011-11-28 |
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