WO2025003317A1 - System zur applikation, verfahren zur herstellung einer transferwalze und applikationsverfahren - Google Patents
System zur applikation, verfahren zur herstellung einer transferwalze und applikationsverfahren Download PDFInfo
- Publication number
- WO2025003317A1 WO2025003317A1 PCT/EP2024/068111 EP2024068111W WO2025003317A1 WO 2025003317 A1 WO2025003317 A1 WO 2025003317A1 EP 2024068111 W EP2024068111 W EP 2024068111W WO 2025003317 A1 WO2025003317 A1 WO 2025003317A1
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- WO
- WIPO (PCT)
- Prior art keywords
- layer
- roller
- transfer
- film
- transfer roller
- 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.)
- Ceased
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F16/00—Transfer printing apparatus
- B41F16/0006—Transfer printing apparatus for printing from an inked or preprinted foil or band
- B41F16/002—Presses of the rotary type
- B41F16/0026—Presses of the rotary type with means for applying print under heat and pressure, e.g. using heat activable adhesive
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
- B41P2219/00—Printing presses using a heated printing foil
- B41P2219/40—Material or products to be decorated or printed
- B41P2219/41—Web-like material
Definitions
- the surface with the lower Fermi level represents the electron donor and the surface with the higher Fermi level represents the electron acceptor.
- the outer surface of the roller and the back of the transfer film are thus charged after the contacting, rubbing and spacing steps.
- the potential difference increases over the course of the process. After a sufficiently high potential difference, an uncontrolled discharge finally takes place, which can lead to the error pattern described above in the application process, in particular the application step of the process.
- the risk of inducing a potential difference is increased, particularly with transfer rollers with soft outer roller surfaces, since the contact area between the surfaces is larger.
- the object is further achieved by a method, in particular by a method according to one of claims 44 to 47, for the synchronized application of a transfer layer to a substrate, in particular by means of a system according to one of claims 1 to 21, wherein a transfer roller with an outer roller surface and a counter-pressure roller form a roller gap, wherein the transfer film, which has a carrier layer and a carrier layer removable transfer layer is fed along the transfer roller into the roller gap, wherein the carrier layer forms the back of the transfer film and is in contact with the outer surface of the transfer roller, and wherein the transfer layer is brought into contact with the substrate in the roller gap, wherein the transfer layer is at least partially transferred to the substrate, wherein during the process a potential difference arising due to the friction between the outer surface of the transfer roller and the back of the transfer film, which is greater than the breakdown voltage of the transfer film, the outer surface of the transfer roller and/or the surrounding gas phase, is avoided.
- a clocked process is understood to be a process in which individual process steps are carried out directly one after the other, with the process being carried out inline.
- To carry out a process it is possible for the different process steps to be carried out in the same period of time.
- the feed of the transfer film in the roller gap can be stopped locally in order to make optimal use of the transfer film, and ultimately to reduce costs and waste.
- This "transfer film stopping” would be possible on the one hand by moving a dancer roller that is in contact with the transfer film (film storage) and/or by stopping an unwinding device for feeding the transfer film.
- the objects of the present invention make it possible to avoid or at least significantly reduce the potential differences that are generated between the roller surface and the carrier layer due to the different Fermi levels during the clocked application process. As a result, this means that no uncontrolled discharges take place during the process and the described defect pattern does not occur during the application process.
- Another advantage associated with reducing, minimizing or eliminating the potential difference is that the adhesion of dust or smaller particles to the surfaces of the device or product is significantly reduced.
- the transfer roller has a rubber layer comprising rubber, in particular soft rubber or hard rubber.
- the transfer roller can have a printing blanket, a cover or a coating, in particular wherein the rubber layer consists of the printing blanket, the cover or the coating is formed.
- the cover and/or the printing blanket can be single-layered and/or multi-layered.
- the coating can be single-layered and/or multi-layered.
- the roller gap is in particular the gap between the outer surface of the transfer roller and the counter-pressure roller.
- a clamping device is preferably provided on the transfer roller, in which clamping aids are held and/or fastened in particular in a force-fitting and/or form-fitting manner.
- a printing blanket or a cover is provided as the rubber layer, wherein the functional layer is applied to the printing blanket or the cover to obtain a printing blanket or a cover comprising the functional layer.
- the printing blanket or the cover is then arranged on the roller.
- a printing blanket or a cover is provided as the rubber layer, which are arranged on the transfer roller. It is also possible that a coating composition is arranged on the transfer roller, whereby a coating is obtained. A transfer roller comprising the printing blanket, the cover or the coating is obtained. The functional layer is then arranged on the printing blanket, the cover or the coating. In the alternatives described above, a transfer roller is obtained in which the functional layer forms the outer surface of the roller.
- the printing blanket, the cover or the coating comprise rubber, in particular soft rubber or hard rubber.
- the rubber layer, in particular the printing blanket, the cover or the coating is compressible or incompressible or is provided in such a way.
- the printing blanket preferably has tensioning aids applied to it, in particular in the form of two metal strips.
- the printing blanket is attached to the transfer roller by means of the tensioning aids via a tensioning device located on the transfer roller.
- the cover is preferably in the form of a sleeve or a tube.
- the cover is designed in such a way that it can be pulled over the transfer roller, with the diameter of the cover being adapted to the diameter of the transfer roller in such a way that it does not slip during the application process. It is possible that the diameter of the cover is reduced by heat after it has been arranged on the transfer roller, thus ensuring that the cover fits snugly on the transfer roller.
- the coating composition comprises one or more of the following components, selected from the group consisting of reactive resins, in particular one-component systems, two-component systems, multi-component systems, polymer melts, polymer dispersions, polymer solutions, or combinations thereof.
- a fabric is inserted into the coating after or during arrangement and before curing and/or drying. More preferably, the coating is vulcanized after arrangement, even more preferably cold vulcanized.
- the coating by means of a spray coating and/or by means of an appropriate adhesive process and/or by a shrink-fitting process. It is possible that the rubber layer, in particular the printing blanket, the cover or the coating, is multi-layered and has at least one fabric layer or is provided or applied in such a way. Alternatively, it is possible that the rubber layer, in particular the printing blanket, the cover or the coating, is single-layered or is applied in such a way.
- the rubber layer preferably a volume unit of the rubber layer, in particular the printing blanket, the cover or the coating
- the rubber layer comprises the components rubber, in particular soft rubber or hard rubber, fabric and gas.
- the rubber layer preferably the volume unit of the rubber layer, in particular the printing blanket, the cover or the coating, to have the following composition, the composition being selected such that it adds up to 100% by volume:
- Rubber especially soft rubber or hard rubber:
- vol.% to 25 vol.% more preferably 1 vol.% to 15 vol.%, even more preferably from 5 vol.% to 15 vol.%.
- the outer surface of the roller is or will be formed by a functional layer.
- the outer surface of the roller does not have any rubber, in particular soft rubber or hard rubber.
- the outer surface of the roller is preferably the outer roller surface of the transfer roller, which is more preferably formed by the functional layer.
- the outer surface of the roller in particular the functional layer, is designed in such a way that the charge generated by friction is removed.
- the outer surface of the roller, in particular the functional layer is conductive or dissipative or is designed in such a way.
- the roller outer surface in particular the functional layer, has a surface resistance R n selected from a range from 0.001 Q/n to 5000 Q/n, preferably from 0.01 Q/n to 500 Q/n, more preferably from 0.1 Q/n to 1 Q/n.
- the sheet resistance R n can be measured or determined using the 2-point method (2PP), and/or the 4-point method (4PP) and/or the Hall effect method and/or the Van der Pauw method, whereby all methods are electrical test methods that are applicable for the contact-based testing of the electrical parameter sheet resistance, in particular sheet resistance R n of the functional layer.
- the sheet resistance Rn is to be measured without contact, it may be preferable to use the eddy current method, in which so-called eddy currents are induced in the conductive materials, which then lead to a secondary field opposite to the primary field, which can then be used to determine the sheet resistance, in particular the sheet resistance R n of the functional layer.
- the surface resistance R n describes the electrical resistance measured on the surface of a layer and is given in the unit Q/n (unit ohms per area or ohms per square). It is therefore fundamentally different from the volume resistance of a body. It is possible to Surface resistance R n as sheet resistance in particular of a
- the sheet resistance R n is understood to be the sheet resistance of the functional layer.
- ASTM F1844-97(2016) (issue date: 2016-05), a standard method for measuring the sheet resistance of thin film conductors used in flat panel display manufacturing. It is possible that the sheet resistance is determined using a method described in ASTM F1844-97(2016).
- BO-PET means biaxially oriented polyethylene terephthalate, in particular a biaxially oriented polyethylene terephthalate film.
- the outer surface of the roller, in particular the functional layer, and the carrier layer, in particular the back of the transfer film consist essentially of polyethylene terephthalate, preferably of biaxially oriented polyethylene terephthalate.
- the outer surface of the roller, in particular the functional layer, and the carrier layer, in particular the back of the transfer film consist essentially of polycarbonate.
- Functional layer formed from components having a dielectric strength selected from a range of 5 kV/mm to 800 kV/mm, preferably 100 kV/mm to 350 kV/mm, more preferably from 150 kV/mm to 300 kV/mm, in particular measured under standard climate and preferably on cleaned surfaces.
- the dielectric strength is determined according to a method described in DIN EN 60243-2 VDE 0303-22:2014-08 ("Electrical breakdown strength of insulating materials - Test methods", issue date: 2014-08).
- Dielectric strength is the maximum electric field strength that can prevail in a non-conductive body with a defined thickness without a voltage breakdown occurring, or the electric field strength at which the conductivity of an insulator increases by several orders of magnitude.
- the functional layer is in contact with the rubber layer, in particular with the printing blanket, the cover or the coating, or is arranged in such a way.
- the functional layer prefferably be or be formed as a single layer or multiple layers.
- the functional layer is or will preferably be arranged over the entire surface of the rubber layer.
- the functional layer is deposited from the vapor phase, in particular with a layer thickness selected from the range from 5 nm to 500 nm, preferably from 10 nm to 200 nm, more preferably from 30 nm to 55 nm.
- a layer thickness selected from the range from 5 nm to 500 nm, preferably from 10 nm to 200 nm, more preferably from 30 nm to 55 nm.
- conductive polymers or the above-mentioned metals or metal alloys are deposited.
- a conductive or dissipative roller outer surface, in particular a functional layer is obtained.
- a polymer film which has a metal layer, wherein the metal layer is arranged on the side of the film facing away from the roller.
- the metal layer in particular made of the metals or metal alloys described above, forms the outer surface of the roller, whereby a conductive or dissipative outer surface of the roller is obtained.
- the polymer film has a layer thickness in the range from 4 pm to 500 pm, preferably from 6 pm to 50 pm, more preferably from 6 pm to 12 pm.
- the metal layer is deposited from the vapor phase, in particular with a layer thickness in the range from 5 nm to 500 nm, preferably from 10 nm to 200 nm, more preferably from 30 nm to 55 nm.
- metals or metal alloys are deposited, in particular selected from the group consisting of iron, nickel, titanium, chromium, molybdenum, manganese, tantalum, copper, gold, silver, aluminum or mixtures and alloys thereof.
- an adhesive layer is arranged between the film, in particular the polymer film or the metal film, and the rubber layer, in particular the printing blanket, the cover or the coating.
- the film, in particular the polymer film or the metal film is provided with an adhesive layer, wherein the adhesive layer is arranged on the side of the film facing the roller.
- the adhesive layer is arranged with or has a layer thickness selected from the range from 5 pm to 250 pm, preferably from 10 pm to 100 pm, more preferably from 20 pm to 50 pm.
- a printing blanket is used as the rubber layer and the functional layer is provided as a film, in particular polymer film and/or metal film
- the film is clamped onto the printing blanket via clamping aids, in particular in the form of two metal strips.
- clamping aids in particular in the form of two metal strips.
- the printing blanket and the film are connected together by two clamping aids, preferably by two metal strips, in particular wherein the printing blanket is then fastened or stretched onto the transfer roller via the two clamping aids and by means of a tensioning device located on the transfer roller.
- the functional layer can be provided as a tube, sleeve or cover, which can be designed like the film described above, in particular polymer film and/or metal foil.
- the film can be designed as a tube, sleeve or cover.
- the film preferably has a layer thickness in the range from 4 pm to 500 pm, preferably from 6 pm to 50 pm, more preferably from 6 pm to 12 pm, and is preferably a polymer film.
- the carrier layer can be a coextrudate, a triextrudate or a multiextrudate from the above group.
- the carrier layer can also be filled or coated. It is possible for the carrier layer to be a multilayer composite and/or a fabric carrier. A biopolymer-based carrier layer is also possible.
- the carrier layer has or is provided with a layer thickness selected from the range from 4 pm to 5000 pm, preferably from 6 pm to 250 pm, more preferably from 9 pm to 23 pm.
- the carrier layer has or is provided with surface properties selected from the group consisting of smooth, rough, fully or partially structured and/or microstructured, perforated, fully or partially coated, or combinations thereof. It is also possible for the carrier layer to be colored and/or transparent or opaque.
- the transfer film or substrate can be provided as a roll or as a sheet.
- the system according to the invention can preferably be arranged in a device, preferably a cold embossing device and/or a hot embossing device.
- the method carried out with the system and/or the device or the application method according to the invention are preferably a cold embossing method or a hot embossing method.
- the device and/or the system has a winding device with which the carrier layer can be removed from the process and which is arranged after the roller gap in the feed direction.
- the device has a clamping device for fastening the clamping aids above the transfer roller.
- the device has one or more printing devices, in particular devices for letterpress, planographic printing, screen printing, gravure printing, inkjet printing or combinations thereof, which are arranged in the feed direction in front of the system, in particular in front of the roller gap.
- an adhesive layer in particular a cold embossing adhesive layer or a hot embossing adhesive layer, is applied to the substrate.
- the adhesive layer is a UV-curable adhesive layer. It can be advantageous if the device has a curing device, in particular comprising a UV source, for curing the adhesive layer. This is advantageous if the device and/or the system is arranged in a cold stamping process or is a cold stamping device.
- the transfer roller and/or the counter-pressure roller prefferably be heatable, in particular if a hot stamping adhesive layer is present or arranged on the substrate or the transfer layer.
- the adhesive layer is preferably a hot melt adhesive layer. This is advantageous if the device and/or the system is arranged in a hot stamping process or is a hot stamping device.
- FIG. 1 and 2 show schematic representations of a system.
- Fig. 6a to 6f show schematic representations of roller outer surfaces.
- Fig. 1 shows a system 1 according to the invention for a timed application process of a transfer layer 11 to a substrate 7.
- the system 1 shown in Fig. 1 can be used to carry out the method according to the invention for the timed application of a transfer layer 11 to the substrate 7.
- the system 1 comprises a transfer roller 2, which has an outer roller surface 4, and a counter-pressure roller 3.
- the transfer roller 2 and counter-pressure roller 3 together form a roller gap 5.
- the system 1 also has a transfer film 10, wherein the transfer film 10 comprises a carrier layer 12 and a transfer layer 11 that can be detached from the carrier layer 12.
- the back side 121 of the transfer film is formed by the carrier layer 12 and the front side of the transfer film is formed by the transfer layer 11.
- the transfer foil back 121 is in contact with the roller outer surface 4 and the transfer foil front in the roller gap 5 - gap between the roller outer surface 4 of the transfer roller 2 and the counter-pressure roller 3 - with a substrate 7.
- the transfer layer 11 is applied at least partially to the substrate 7.
- the system 1 according to the invention is designed in such a way that no potential difference is generated by the friction, in particular electrostatic charging induced by the friction, between the outer roller surface 4 of the transfer roller 2 and the transfer film back 121 during the timing step between the application steps, in particular the application steps of the method, in particular no electrical voltage is generated by the potential difference which exceeds the breakdown voltage of the transfer film 10, the outer roller surface 4 and/or the surrounding gas phase.
- Fig. 1 schematically shows the process cycle in which the feeding of the transfer film 10 into the roller gap 5 - gap between the outer roller surface 4 of the transfer roller 2 and the counter-pressure roller 3 - is stopped.
- This is possible, for example, in the process step of timing between the application of the transfer layer 11 to the substrate 7.
- This is possible by moving a dancer roller that is in contact with the transfer film 10, adjusting the film tension and/or by stopping an unwinding device for feeding the transfer film 10.
- the transfer roller 2 can have a rubber layer 9 comprising rubber, in particular soft rubber or hard rubber.
- the transfer roller 2 can have a printing blanket, a cover or a coating, in particular wherein the rubber layer 9 is formed from the printing blanket, the cover or the coating.
- the cover and/or the printing blanket can be single-layered and/or multi-layered.
- the coating can be single-layered and/or multi-layered.
- a tensioning device 14 is provided on the transfer roller 2, in which tensioning aids 13 are each in particular are held or fastened in a force-fitting and/or form-fitting manner.
- the transfer roller 2 according to the invention with an outer roller surface is produced according to a method according to the invention, the method comprising the following steps, in particular in the order a), b), c), d) or a), c), b), d): a) providing a transfer roller 2, b) arranging a rubber layer 9 on the transfer roller 2, c) arranging a functional layer 6 on the rubber layer 9, d) obtaining a transfer roller 2, the functional layer 6 forming the outer roller surface 4.
- the printing blanket or the cover is provided as the rubber layer 9, wherein the functional layer 6 is applied to the printing blanket or the cover to obtain the printing blanket or the cover comprising the functional layer 6.
- the printing blanket or the cover is then arranged on the roller.
- the printing blanket preferably has tensioning aids 13, in particular in the form of two metal strips.
- the printing blanket is attached to the transfer roller 2 via the tensioning aids 13 and by means of a tensioning device 14 located on the transfer roller, not shown in detail here.
- the tensioning aids 13 are each held or attached in particular in a force-fitting and/or form-fitting manner.
- the cover is preferably in the form of a sleeve or a tube.
- the cover is designed in such a way that it can be pulled over the transfer roller 2, the diameter of the cover being adapted to the diameter of the transfer roller 2 in such a way that it does not slip during the application process. It is possible that the diameter of the cover is reduced by heat after it has been placed on the transfer roller, thus ensuring that the cover is positioned precisely on the transfer roller.
- the coating composition preferably comprises one or more of the following components, selected from the group consisting of reactive resins, in particular one-component systems, two-component systems, multi-component systems, polymer melts, polymer dispersions, polymer solutions, or combinations thereof.
- a fabric is inserted into the coating after or during arrangement and before curing and/or drying. More preferably, the coating is vulcanized after arrangement, even more preferably cold vulcanized.
- the rubber layer 9, in particular the printing blanket, the cover or the coating is multi-layered and has at least one fabric layer or is provided or applied in such a way.
- the rubber layer 9, in particular the printing blanket, the cover or the coating is single-layered or is applied in such a way.
- the rubber layer 9, preferably a volume unit of the rubber layer 9, in particular of the printing blanket, the cover or the coating comprises the components rubber, in particular soft rubber or hard rubber, fabric and gas. It is possible that the rubber layer 9, Preferably, the volume unit of the rubber layer 9, in particular of the printing blanket, the cover or the coating, has the following composition, wherein the composition is selected such that it gives a total of 100 vol.%:
- Rubber especially soft rubber or hard rubber:
- vol.% to 25 vol.% more preferably 1 vol.% to 15 vol.%, even more preferably from 5 vol.% to 15 vol.%.
- roller outer surface 4 is or will be formed by a functional layer 6.
- the roller outer surface 4 does not have any rubber, in particular soft rubber or hard rubber.
- the functional layer 6 is preferably in contact with the rubber layer 9, in particular with the printing blanket, the cover or the coating, or is arranged in such a way. It is possible for the functional layer 6 to be or be formed as a single layer or multiple layers. The functional layer 6 is or will preferably be arranged over the entire surface of the rubber layer 9.
- the outer surface 4 of the roller in particular the functional layer 6, is designed in such a way that the charge generated by friction is removed.
- the outer surface 4 of the roller is conductive or dissipative or is designed in such a way.
- the roller outer surface has a surface resistance Rn selected from a range from 0.001 Q/n to 5000 Q/n, preferably from 0.01 Q/n to 500 Q/n, more preferably from 0.1 Q/n to 1 Q/n.
- the sheet resistance Rn can be measured or determined using the 2-point method (2PP) and/or the 4-point method (4PP) and/or the Hall effect method and/or the Van der Pauw method, whereby all methods are electrical test methods that are applicable for the contact-based testing of the electrical parameter sheet resistance, in particular sheet resistance R n of the functional layer.
- the sheet resistance Rn is to be measured without contact, this can be done using the eddy current method, in which so-called eddy currents are induced in the conductive materials, which then lead to a secondary field opposite to the primary field, which can then be used to determine the sheet resistance, in particular the sheet resistance R n of the functional layer.
- roller outer surface 4, in particular the functional layer 6, has conductive or dissipative components.
- the functional layer 6 comprises metals, in particular selected from the group consisting of iron, nickel, titanium, chromium, molybdenum, manganese, tantalum, copper, gold, silver, aluminum or mixtures and alloys thereof.
- the functional layer 6 comprises aluminum.
- the functional layer 6 comprises a metal alloy selected from the group consisting of iron-nickel, copper-nickel, nickel-copper, nickel-chromium or mixtures thereof.
- the roller outer surface 4, in particular the functional layer 6, consists entirely of metal, in particular selected from the above group, or has a binder, in particular a polymer.
- the binder can be conductive, dissipative or non-conductive.
- the roller outer surface 4, in particular the functional layer 6, has conductive or dissipative carbon modifications, in particular selected from the group consisting of graphene, fullerenes, carbon nanotubes, graphite, carbon black or combinations thereof. It is possible for the roller outer surface 4, in particular the functional layer 6, to have conductive or dissipative polymers. It is possible for the roller outer surface 4, in particular the functional layer 6, to have a combination of metal, conductive or dissipative carbon modification and/or conductive or dissipative polymers.
- the Fermi level of the roller outer surface 4, in particular the functional layer, and the carrier layer 12 are and/or are adapted to one another.
- the difference between the Fermi levels of the roller outer surface, in particular the functional layer, and the carrier layer is and/or is reduced.
- Adaptation to one another can be achieved, for example, by selectively selecting the components of the roller outer surface, in particular the functional layer, and the carrier layer.
- the Fermi level 0 of the roller outer surface 4 of the transfer roller 2, in particular the functional layer 6, and the carrier layer 12 is essentially the same, in particular in the cleaned state and/or under standard climate.
- the roller outer surface 4, in particular the functional layer e is not conductive or is designed in such a way.
- the components of the roller outer surface 4, in particular the functional layer, and the carrier layer 12 are selected such that the work function of the roller outer surface 4, in particular the functional layer, and the carrier layer 12 differs by at most 30%, preferably at most 20%, more preferably at most 15%.
- the components of the outer roller surface 4 of the transfer roller 2, in particular the functional layer 6, and the carrier layer 12 are selected such that they are close to one another with reference to the triboelectric series.
- the distance in the triboelectric series of the outer roller surface 4 of the transfer roller 2 and the carrier layer 12 is smaller than the distance of the outer roller surface and the carrier layer 12 to the air or rubber layer.
- the outer roller surface 4 of the transfer roller 2, in particular the functional layer 6, is or will be formed from the same polymer as the carrier layer 12.
- the polymer of the roller outer surface 4 of the transfer roller 2, in particular the functional layer 6, and the carrier layer 6 is selected from the group consisting of PFP, polyethylene, polycarbonate, polypropylene, polyvinyl chloride, polystyrene, polyethylene terephthalate, acrylonitrile-butadiene-styrene copolymer, cellophane, polybutylene terephthalate, polymethyl methacrylate, polylactide, cellulose diacetate, cellulose triacetate, BO-PET, starch blends or copolymers and/or blends thereof.
- the polymer of the roller outer surface 4, in particular the functional layer 6, is preferably made of polyethylene terephthalate, preferably biaxially oriented polyethylene terephthalate.
- the outer surface 4 of the transfer roller 2, in particular the functional layer 6, and the carrier layer 12, in particular the transfer film back 121 essentially consists of Polyethylene terephthalate, preferably biaxially oriented polyethylene terephthalate.
- the outer surface 4 of the transfer roller 2, in particular the functional layer 6, and the carrier layer 12, in particular the transfer film back 121 consist essentially of polycarbonate.
- the roller outer surface 121 in particular the functional layer 6, is formed from components that have a dielectric strength selected from a range of 5 kV/mm to 800 kV/mm, preferably from 100 kV/mm to 350 kV/mm, more preferably from 150 kV/mm to 300 kV/mm, in particular measured under normal climate and preferably on cleaned surfaces.
- the dielectric strength is determined according to a method described in DIN EN 60243-2 VDE 0303-22:2014-08.
- the carrier layer 12 consists of a component selected from the group consisting of PFP, polyethylene, polypropylene, polyvinyl chloride, polycarbonate, polystyrene, polyethylene terephthalate, polybutylene terephthalate, polylactide, cellulose diacetate, cellulose triacetate, BO-PET, starch blends, acrylonitrile-butadiene-styrene copolymer, cellophane, polymethyl methacrylate, or copolymers and/or blends thereof.
- the carrier layer 12 is preferably made of polyethylene terephthalate, preferably of biaxially oriented polyethylene terephthalate, and in particular is non-conductive.
- the carrier layer 12 can be a coextrudate, a triextrudate or a multiextrudate of the above group.
- the carrier layer 12 can also be filled or coated.
- the carrier layer 12 can be a multilayer composite and/or a fabric carrier.
- a carrier layer 12 based on biopolymers is also possible. It is possible that the carrier layer 12 has or is provided with a layer thickness in the range from 4 pm to 5000 pm, preferably from 6 pm to 250 pm, more preferably from 9 pm to 23 pm.
- the carrier layer 12 prefferably has or be provided with surface properties that are selected from the group consisting of smooth, rough, completely or partially structured and/or microstructured, perforated, completely or partially coated or combinations thereof. It is also possible for the carrier layer 12 to be colored and/or transparent or opaque.
- the transfer film 10 or the substrate 7 can be provided as roll goods or as sheet goods.
- the system 1 according to the invention can preferably be arranged in a device, preferably a cold stamping device and/or a hot stamping device.
- the method carried out with the system 1 and/or the device is preferably a cold stamping method and/or a hot stamping method.
- the device and/or the system 1 has at least one or more devices for receiving film rolls, in particular the transfer film 10 and/or the carrier layer 12 and/or the substrate 7.
- the device and/or the system 1 has an unwinding device with which the provided transfer film 10 can be fed to the process and which is arranged in the feed direction before the roller gap 5 - gap between the outer roller surface 4 of the transfer roller 2 and the counter-pressure roller 3.
- the device and/or the system 1 has a rolling-up device with which the carrier layer 12 can be removed from the process and which is arranged in the feed direction after the roller gap 5.
- the device has a Clamping device 14 for fastening the clamping aids 13 above the transfer roller.
- the device preferably has one or more printing devices, in particular devices for letterpress, planographic printing, screen printing, gravure printing, inkjet printing or combinations thereof, which are arranged in the feed direction upstream of the system 1, in particular upstream of the roller gap 5 - gap between the outer roller surface 4 of the transfer roller 2 and the counter-pressure roller 3.
- an adhesive layer 8 in particular a cold embossing adhesive layer or a hot embossing adhesive layer, is applied to the substrate 7.
- the adhesive layer 8 is preferably a UV-curable adhesive layer. It can be advantageous if the device has a curing device, in particular comprising a UV source, for curing the adhesive layer 8. This is advantageous if the device and/or the system 1 is arranged in a cold embossing process or is a cold embossing device.
- the transfer roller 2 and/or the counter-pressure roller 3 are heatable, in particular if a hot stamping adhesive layer is present or arranged on the substrate 7 or the transfer layer 11.
- the adhesive layer 8 is preferably a hot melt adhesive layer. This is advantageous if the device and/or the system 1 is arranged in a hot stamping process or is a hot stamping device.
- the system 1 and/or the device has at least one control device for controlling the feeding of the transfer film 10 and/or the substrate 7 to the roller gap 5 - gap between the outer roller surface 4 of the transfer roller 2 and the counter-pressure roller 3.
- the feeding of the transfer film 10 in the roller gap 5 is stopped by stopping the unwinding device and/or rolling-up device of the transfer film 10, the film tension of the transfer film 10 is adjusted and/or by moving a dancer roller which is in contact with the transfer film 10.
- the amount of the maximum number of revolutions of the transfer roller 2 of a point arranged on the outer surface of the roller is in the range from 500 revolutions/h to 30,000 revolutions/h, preferably from 5,000 revolutions/h to 24,000 revolutions/h, more preferably from 15,000 revolutions/h to 18,000 revolutions/h, in particular with respect to the center of the roller.
- the Fermi level 0 of the transfer film back 121 is lower, with the result that the transfer film back 121 of the carrier layer 12 represents the electron donor.
- the Fermi level 0 of the two surfaces adapt due to the friction-induced charge exchange, so that both have the same Fermi level 0' or Fermi energy EF'.
- the transfer film back 121 is positively charged due to the friction in the roller gap 5 in position B and the roller outer surface 4 of the transfer roller 2 is negatively charged.
- Fig. 6c and Fig. 6d show a rubber layer 9 on which a functional layer 6 has been arranged or is present as a lacquer layer.
- the lacquer layer is or will be applied with a layer thickness selected from the range of 2 pm to 100 pm, preferably from 10 pm to 25 pm.
- the functional layer 6 is applied as a printing lacquer, spray lacquer, reactive lacquer or a combination thereof. It is possible for the functional layer 6, in particular lacquer layer, to be printed on, in particular by a printing process and/or spraying process selected from the group consisting of letterpress printing, planographic printing, screen printing, gravure printing, inkjet printing or combinations thereof.
- the functional layer 6 shown in Fig. 6c is in particular a conductive or dissipative lacquer layer and is in particular made from a conductive lacquer.
- the conductive lacquer is in particular a silver conductive lacquer or conductive silver, a copper conductive lacquer and/or a graphite conductive lacquer.
- the conductive lacquer or the conductive or dissipative lacquer layer comprises one or more of the following particles, in particular nanoparticles: silver, copper, conductive carbon modifications, in particular graphene, carbon nanotubes, industrial carbon black or graphite, gold, aluminum and/or metal alloys.
- a conductive or dissipative roller outer surface 4 of the transfer roller 2, in particular functional layer 6, is obtained here.
- the conductive lacquer preferably comprises a lacquer, a polymer dispersion, polymer solution or a synthetic resin as a binder.
- the lacquer layer, in particular conductive or dissipative lacquer layer, preferably comprises a polymer as a binder.
- a non-conductive paint layer is or is arranged.
- the non-conductive paint layer preferably comprises a polymer dispersion, polymer solution or a synthetic resin as a binder.
- the non-conductive paint layer preferably comprises a non-conductive polymer as a binder.
- the lacquer layer has no conductive or dissipative components.
- the non-conductive lacquer layer or its binder is or will be formed from the same polymer as the carrier layer 12 of the system 1 according to Fig. 1.
- the polymer of the non-conductive lacquer layer and the carrier layer 12 is selected from the group consisting of PFP, polyethylene, polypropylene, polycarbonate, polyvinyl chloride, polystyrene, polyethylene terephthalate, acrylonitrile-butadiene-styrene copolymer, cellophane, polybutylene terephthalate, polylactide, cellulose diacetate, cellulose triacetate, BO-PET, starch blends, polymethyl methacrylate or copolymers and/or blends thereof.
- the polymer of the non-conductive lacquer layer and the carrier layer is polyethylene terephthalate.
- the lacquer layer according to Fig. 6c and 6d in particular the conductive or dissipative lacquer layer or the non-conductive lacquer layer, comprises a solvent-based or water-based binder.
- the binder can be one-component or two-component or multi-component.
- the lacquer layer in particular the conductive or dissipative lacquer layer or the non-conductive lacquer layer, is preferably single-layered or multi-layered. It is possible for the functional layer 6, preferably the lacquer layer, more preferably the conductive or dissipative lacquer layer or the non-conductive lacquer layer, to comprise several layers that differ in composition. It is also possible for the lacquer layer, in particular the conductive or dissipative lacquer layer or the non-conductive lacquer layer, to be designed in a layered composite. For example, the lacquer layer, in particular the conductive or dissipative lacquer layer, can be present in conjunction with one or more vapor-deposited metal layers or transparent oxide layers.
- 6e, 6f and 6g show functional layers 6 arranged on rubber layers 9, which are provided as a film.
- the film is preferably laminated or embossed onto the rubber layer 9.
- the film is a metal foil or is provided as such.
- the film, in particular the metal foil has a layer thickness in the range from 2 pm to 200 pm, preferably from 5 pm to 100 pm, more preferably from 20 pm to 40 pm, wherein the layer thicknesses are layer thicknesses of the pure metal foil.
- a corresponding adhesive layer, in particular for arranging the metal foil on the outer surface 4 of the roller preferably has a layer thickness in the range from 5 pm to 250 pm, preferably from 10 pm to 100 pm, more preferably from 20 pm to 50 pm.
- the film is preferably a polymer film or is provided as such.
- This film in particular the polymer film, preferably has a layer thickness in the range from 4 pm to 500 pm, preferably from 6 pm to 50 pm, more preferably from 6 pm to 12 pm, wherein the layer thicknesses are layer thicknesses of the pure polymer film without additionally applied layers.
- a corresponding adhesive layer in particular for arranging the polymer film on the outer surface 4 of the roller, preferably has a layer thickness in the range from 5 pm to 250 pm, preferably from 10 pm to 100 pm, more preferably from 20 pm to 50 pm.
- the film is provided as a polymer film.
- the polymer film is or will be formed from the same polymer as the carrier layer 12, wherein the polymer is preferably selected from the group consisting of PFP, polyethylene, polypropylene, polyvinyl chloride, polystyrene, polyethylene terephthalate, acrylonitrile-butadiene-styrene copolymer, cellophane, polycarbonate, polybutylene terephthalate, polylactide, cellulose diacetate, cellulose triacetate, BO-PET, starch blends, polymethyl methacrylate or copolymers and/or blends thereof.
- the Polymer film made of polyethylene terephthalate, in particular biaxially oriented polyethylene terephthalate, is provided.
- the foil is provided as a metal foil. This results in a conductive or dissipative outer roller surface 4 of the transfer roller 2, in particular made of the metals or metal alloys described above.
- a polymer film which has a metal layer. It is also possible for a polymer film to be provided as the film which has a metal layer, wherein the metal layer is arranged on the side of the film which faces away from the roller. As a result, the metal layer, in particular made of the metals or metal alloys described above, forms the outer roller surface 4 of the transfer roller 2, whereby a conductive or dissipative outer roller surface 4 is obtained.
- the polymer film preferably has a layer thickness in the range from 4 pm to 500 pm, preferably from 6 pm to 50 pm, more preferably from 6 pm to 12 pm.
- the metal layer is deposited from the vapor phase, in particular with a layer thickness in the range from 5 nm to 500 nm, preferably from 10 nm to 200 nm, more preferably from 30 nm to 55 nm.
- metals or metal alloys are deposited, in particular selected from the group consisting of iron, nickel, titanium, chromium, molybdenum, manganese, tantalum, copper, gold, silver, aluminum or mixtures and alloys thereof.
- an adhesive layer 8 is arranged between the film and the rubber layer 9, in particular the printing blanket, the cover or the coating.
- the film, in particular the polymer film or the metal film is provided with adhesive layer 8. is provided, wherein the adhesive layer 8 is arranged on the side of the film facing the roller.
- the adhesive layer is arranged with or has a layer thickness in the range from 5 pm to 250 pm, preferably from 10 pm to 100 pm, more preferably from 20 pm to 50 pm.
- the film, in particular polymer film and/or metal film can be clamped onto the printing blanket using clamping aids 13, in particular in the form of two metal strips.
- the printing blanket and the film, in particular polymer film and/or metal film are connected together using two clamping aids 13, preferably two metal strips, in particular whereby the printing blanket is then attached or stretched onto the transfer roller 2 using the two clamping aids 13 and by means of a clamping device located on the transfer roller 2. This produces a printing blanket which comprises the film.
- the rubber layer 9 can also be provided as a cover or a coating, in particular arranged on a transfer roller 2.
- the functional layer 6 can be provided as a hose, sleeve or cover, in particular wherein these can be designed like the films described in Figs. 6e to 6f.
- the film can be designed as a hose, sleeve or cover.
- the film preferably has a layer thickness in the range from 4 pm to 500 pm, preferably from 6 pm to 50 pm, more preferably from 6 pm to 12 pm, and is preferably a polymer film.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rolls And Other Rotary Bodies (AREA)
- Electrostatic Charge, Transfer And Separation In Electrography (AREA)
Abstract
Description
Claims
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP24737733.6A EP4735259A1 (de) | 2023-06-29 | 2024-06-27 | System zur applikation, verfahren zur herstellung einer transferwalze und applikationsverfahren |
| CN202480041892.1A CN121398966A (zh) | 2023-06-29 | 2024-06-27 | 施加系统、用于制造转印辊的方法及施加方法 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102023117227.1 | 2023-06-29 | ||
| DE102023117227.1A DE102023117227A1 (de) | 2023-06-29 | 2023-06-29 | System zur Applikation, Verfahren zur Herstellung einer Transferwalze und Applikationsverfahren |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2025003317A1 true WO2025003317A1 (de) | 2025-01-02 |
Family
ID=91759406
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2024/068111 Ceased WO2025003317A1 (de) | 2023-06-29 | 2024-06-27 | System zur applikation, verfahren zur herstellung einer transferwalze und applikationsverfahren |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP4735259A1 (de) |
| CN (1) | CN121398966A (de) |
| DE (1) | DE102023117227A1 (de) |
| WO (1) | WO2025003317A1 (de) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1453614B1 (de) * | 2001-11-26 | 2006-11-29 | tesa AG | Beschichtungsverfahren |
| US20190022937A1 (en) * | 2015-12-31 | 2019-01-24 | Evolve Additive Solutions, Inc. | Building with cylindrical layers in additive manufacturing |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6478875A (en) * | 1987-09-20 | 1989-03-24 | Fujitsu Ltd | Printing method |
| DE4417784A1 (de) * | 1994-05-20 | 1995-11-23 | Dlw Ag | Verfahren und Vorrichtung zum Bemustern von Bahnen oder Bogen sowie damit hergestellte Bahnen bzw. Bogen |
| JP4837714B2 (ja) * | 2008-10-16 | 2011-12-14 | 株式会社特殊阿部製版所 | 印刷・加飾ローラ及びその製造方法 |
| KR101222766B1 (ko) * | 2010-12-28 | 2013-01-16 | 한국조폐공사 | 전도성물질 대전 인쇄방법 및 그 장치 |
-
2023
- 2023-06-29 DE DE102023117227.1A patent/DE102023117227A1/de active Pending
-
2024
- 2024-06-27 CN CN202480041892.1A patent/CN121398966A/zh active Pending
- 2024-06-27 EP EP24737733.6A patent/EP4735259A1/de active Pending
- 2024-06-27 WO PCT/EP2024/068111 patent/WO2025003317A1/de not_active Ceased
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1453614B1 (de) * | 2001-11-26 | 2006-11-29 | tesa AG | Beschichtungsverfahren |
| US20190022937A1 (en) * | 2015-12-31 | 2019-01-24 | Evolve Additive Solutions, Inc. | Building with cylindrical layers in additive manufacturing |
Non-Patent Citations (3)
| Title |
|---|
| "Elektrische Durchschlagfestigkeit von isolierenden Werkstoffen - Prüfverfahren", DIN EN 60243-2 VDE 0303-22:2014-08, August 2014 (2014-08-01) |
| "Textilien - Normalklimate für die Probenvorbereitung und Prüfung (ISO 139:2005 + Amd.1:2011), Deutsche Fassung EN ISO 139:2005 + A1:2011", DIN EN ISO 139:2011-10, October 2011 (2011-10-01) |
| QUELLE: "Verfahren der Oberflächentechnik", 2004 |
Also Published As
| Publication number | Publication date |
|---|---|
| EP4735259A1 (de) | 2026-05-06 |
| CN121398966A (zh) | 2026-01-23 |
| DE102023117227A1 (de) | 2025-01-02 |
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