EP2509797A1 - Oscillator rollers - Google Patents
Oscillator rollersInfo
- Publication number
- EP2509797A1 EP2509797A1 EP10788320A EP10788320A EP2509797A1 EP 2509797 A1 EP2509797 A1 EP 2509797A1 EP 10788320 A EP10788320 A EP 10788320A EP 10788320 A EP10788320 A EP 10788320A EP 2509797 A1 EP2509797 A1 EP 2509797A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- coating composition
- polyamide
- use according
- roll
- 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.)
- Granted
Links
- 239000008199 coating composition Substances 0.000 claims abstract description 40
- 238000000034 method Methods 0.000 claims abstract description 27
- 239000004642 Polyimide Substances 0.000 claims abstract description 25
- 229920001721 polyimide Polymers 0.000 claims abstract description 25
- 239000004962 Polyamide-imide Substances 0.000 claims abstract description 21
- 239000007788 liquid Substances 0.000 claims abstract description 21
- 229920002312 polyamide-imide Polymers 0.000 claims abstract description 21
- 239000011248 coating agent Substances 0.000 claims description 22
- 238000000576 coating method Methods 0.000 claims description 22
- 239000004952 Polyamide Substances 0.000 claims description 11
- 229920002647 polyamide Polymers 0.000 claims description 11
- 238000007711 solidification Methods 0.000 claims description 6
- 230000008023 solidification Effects 0.000 claims description 6
- 238000007645 offset printing Methods 0.000 claims description 5
- 239000002904 solvent Substances 0.000 claims description 5
- -1 Polyamidpräpolymere Polymers 0.000 claims description 3
- 239000000654 additive Substances 0.000 claims description 3
- 238000005266 casting Methods 0.000 claims description 3
- 239000003086 colorant Substances 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- 239000000945 filler Substances 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 3
- 238000010345 tape casting Methods 0.000 claims description 3
- 230000000996 additive effect Effects 0.000 claims 1
- 239000004959 Rilsan Substances 0.000 abstract description 4
- 238000007639 printing Methods 0.000 description 9
- 229910000831 Steel Inorganic materials 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 238000000227 grinding Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000005496 tempering Methods 0.000 description 4
- 125000003118 aryl group Chemical group 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 125000005442 diisocyanate group Chemical group 0.000 description 2
- 229920005575 poly(amic acid) Polymers 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000007858 starting material Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 1
- 150000008064 anhydrides Chemical class 0.000 description 1
- 239000004918 carbon fiber reinforced polymer Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 150000004985 diamines Chemical class 0.000 description 1
- 238000004043 dyeing Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000011152 fibreglass Substances 0.000 description 1
- 229920002313 fluoropolymer Polymers 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 150000002825 nitriles Chemical class 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 229920001568 phenolic resin Polymers 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
- B41N7/00—Shells for rollers of printing machines
- B41N7/005—Coating of the composition; Moulding; Reclaiming; Finishing; Trimming
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F31/00—Inking arrangements or devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F31/00—Inking arrangements or devices
- B41F31/002—Heating or cooling of ink or ink rollers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F31/00—Inking arrangements or devices
- B41F31/02—Ducts, containers, supply or metering devices
- B41F31/14—Applications of messenger or other moving transfer rollers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F31/00—Inking arrangements or devices
- B41F31/26—Construction of inking rollers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
- B41N7/00—Shells for rollers of printing machines
- B41N7/04—Shells for rollers of printing machines for damping rollers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
- B41N7/00—Shells for rollers of printing machines
- B41N7/06—Shells for rollers of printing machines for inking rollers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
- B41N2207/00—Location or type of the layers in shells for rollers of printing machines
- B41N2207/02—Top layers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
- B41N2207/00—Location or type of the layers in shells for rollers of printing machines
- B41N2207/14—Location or type of the layers in shells for rollers of printing machines characterised by macromolecular organic compounds
Definitions
- the present application relates to a method for producing a rigid roll, a rigid roll and their use.
- Offset printing is still the dominant technology in printing processes. It is an indirect printing process that is used in newspaper, magazine, catalog and packaging printing, etc.
- a printing plate is created, typically a thin aluminum plate. This is clamped on a Plattenzyl indians and is in the printing press with dyeing and dampening in conjunction. Lipophilic areas of the printing form accept ink while hydrophilic areas remain colorless.
- the ink is transferred to the blanket mounted on a blanket cylinder or offset cylinder.
- the blanket cylinder then transfers the ink to the medium to be printed using a counter-pressure cylinder or another blanket cylinder.
- the color is applied from the reservoir via a special inking unit.
- the ink is typically transported via the stool by means of a plurality of rollers.
- rigid rollers distributed via the stool by means of a plurality of rollers.
- elastic rollers ink rollers
- the distributor rollers typically consist of a steel core with a coating of Rilsan and are therefore often referred to as Rilsanwalzen. These are usually made in the following process: The bare steel core is heated and then introduced into a bath of Rilsan powder (a special grade of polyamide) rotating. The Rilsan powder melts in contact with the hot core, ensuring a relatively uniform coating. The surface quality of the coating is far from sufficient for use in offset printing, so they z. B. must be processed via a grinding process. Disadvantages of this method are costs (expensive grinding process and removal of previously applied material) and a high layer thickness. It is costly to achieve layer thicknesses below about 100 pm. However, this is particularly desirable when working with internally cooled distributor rollers, as is the case today with many printing presses. Too thick a coating prevents effective heat transfer from the surface of the distributor roller.
- EP 0 942 833 B1 describes an inking roller in which an elastomeric coating material, for example polymeric nitrile butadiene, phenolic resin, epoxy resin, polyurethane and other materials are applied to a roller.
- an elastomeric coating material for example polymeric nitrile butadiene, phenolic resin, epoxy resin, polyurethane and other materials are applied to a roller.
- the object of the present invention was to provide processes for producing rolls and rolls, which overcomes the above-mentioned disadvantages of the prior art.
- the object is achieved by a method for producing a rigid roller comprising the steps:
- a roll core is provided in the first step.
- Typical roll cores are made of metal, especially steel and aluminum. But it may also be non-metallic roll cores, for example ceramic, glass fiber reinforced plastic (GfK) or carbon fiber reinforced plastic (CfK) act.
- GfK glass fiber reinforced plastic
- CfK carbon fiber reinforced plastic
- the roll core according to the invention is for an intemperated roll.
- InnertemperATOR rollers are rollers that can be tempered using a tempering medium.
- the tempering medium may be a liquid or tempered air. Usually, tempering is used for cooling.
- Corresponding rolls are known for example from DE 93 169 324.
- the roll core may have a roughness Rz of 0.1 to 100 ⁇ m, preferably 1 to 30 ⁇ m.
- the coating composition essentially comprises a polyimide or polyamide prepolymer.
- Starting materials for the preparation of polyimides are preferably aromatic and aliphatic diamines with aromatic tetracarboxylic dianhydrides; instead of the diamines, it is also possible to use diisocyanates.
- a polyamic acid is formed, which then further reacts to form the polyimide.
- starting materials for polyamideimides are preferably aromatic tricarboxylic anhydrides with aromatic or aliphatic diamines or diisocyanates.
- Prepolymers are understood as meaning mixtures of reactive monomers which have already partially but not completely reacted with the polymer.
- the curing reaction takes place after application to the roll core. Curing is achieved or accelerated by heating.
- a range of 1 to 1000 pm has proven to be fundamentally suitable, with a range of 10 to 200 pm, or 20 to 120 pm being preferred.
- the coating composition is used essentially on the basis of a polyimide or polyamide-imide prepolymer, it can contain further substances, in particular fillers, additives, colorants, etc.
- the coating composition preferably contains a polyimide or polyamide-imide prepolymer as the main constituent (> 50 wt .%).
- the coating composition of prepolymers contains only polyimide prepolymers.
- the coating composition contains only polyamide imide prepolymers.
- the coating composition contains both polyimide prepolymers and polyamide-imide prepolymers.
- Another embodiment is a roller in which the coating composition contains a polyimide prepolymer and, in addition, polyamides or polyamideimides are contained in the coating composition.
- the coating composition contains dissolved polyimides instead of polyimide prepolymers.
- the coating composition additionally contains polyamides or polyamide prepolymers.
- the ratio of polyimide prepolymers to polyamides + polyamide prepolymers is preferably in the ratio of 10: 0 to 10: 9.
- the coating composition may also contain dissolved polyamide-imide.
- Suitable methods for applying the liquid coating composition are, in particular, spraying, knife coating, thin-layer rotary casting or ring coating.
- the liquid coating composition solidifies by a curing process, i. E. another reaction to the polymer.
- the prepolymer contains a solvent
- the solidification is assisted by the drying / evaporation of the solvents.
- the material applied according to the invention is preferably of such a uniform, high-quality surface that grinding of the coating composition after solidification is not required.
- the roller according to the invention has excellent properties for the printing process: high wear resistance, high chemical resistance, good ink acceptance, good ink delivery and good cleanability. These properties are also a result of the uncut surface, which thus has no pores and thus is also not susceptible to deposits from the printing process.
- the invention also provides a rigid, temperature-controlled roller, which is obtainable by the process according to the invention.
- the roll according to the invention is characterized by a roll core and a solidified, preferably non-polished, polyimide-based coating located thereon in a layer thickness of 1 to 1000 ⁇ m.
- the coating of the roller according to the invention may have a modulus of elasticity in the range from 0.5 to 500 MPa.
- the roll core has a roughness Rz of 0, 1 to 100 pm, preferably 1 to 30 pm.
- the application of the coating composition can lead to a reduction of the roughness.
- the roughness of the solidified coating is less than the roughness of the roll core.
- the invention also provides a method for adjusting a predetermined roughness of the roll, in which a roll core is coated with a defined roughness to obtain a roll with a defined roughness of the coating composition.
- the roll according to the invention is suitable for internally tempered rolls and / or iridescent rolls.
- Internal tempered rolls are used to dissipate heat to the watering process to provide even pressure conditions.
- "Oscillation” means that the roller is axially reciprocated during operation (i.e., in a rotating state) so as to achieve improved uniformity of the ink film.
- the rolls with a coating based on polyimide or polyamide-imide are not only advantageous as internally tempered rolls, but also in their non-tempered form. First, their production is facilitated by the fact that a grinding of the surface is not necessary. In particular, the roughness of the coating can be adjusted by selecting the roughness of the roll core and the coating thickness.
- the subject of the invention is also the use of a rigid roll obtainable by a process comprising the steps:
- the invention furthermore relates to an inking unit comprising rigid distributor rollers and elastic rollers, wherein at least one rigid roller is a roller obtainable by a method comprising the steps:
- FIG. 1 shows an inking unit with a ductor roller 1, a lifting roller 2, distributor rollers 3, transfer rollers 4 and inking rollers 5.
- Example 2 On a steel core, a solution of polyamic acid is applied in the thin-layer rotation casting. In the rotating state, the material is heated so that a substantial proportion of the solvent evaporates. This results in the coating composition remaining stable after the end of the rotation. This is followed by a tempering of the roller at up to 250 ° C. Pressure tests with such a roller gave excellent results.
- Example 2
- Example 1 In the method according to Example 1, a steel core with a roughness Rz of 15 pm was used. In the case of a coating with a thickness of 80 ⁇ m according to Example 1, an Rz of approximately 2.2 ⁇ m remains on the surface. In the case of a coating with a layer thickness of 30 ⁇ m, an Rz of about 5 ⁇ m remains, ie. By choosing the coating thickness, the roughness of the coating can be adjusted.
Landscapes
- Rolls And Other Rotary Bodies (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Inking, Control Or Cleaning Of Printing Machines (AREA)
- Paints Or Removers (AREA)
Abstract
Description
Reiberwalzen distributor rollers
Die vorliegende Anmeldung betrifft ein Verfahren zur Herstellung einer starren Walze, eine starre Walze und ihre Verwendung . The present application relates to a method for producing a rigid roll, a rigid roll and their use.
Der Offsetdruck ist nach wie vor die dominierende Technologie bei Druckver- fahren. Es handelt sich um ein indirektes Druckverfahren, das im Zeitungs-, Zeitschriften-, Katalog- und Verpackungsdruck, etc. zum Einsatz kommt. Im Offsetdruck wird eine Druckform erstellt, typischerweise eine dünne Aluminiumplatte . Diese wird auf einen Plattenzyl inder gespannt und steht in der Druckmaschine mit Färb- und Feuchtwerken in Verbindung . Lipophile Bereiche der Druckform nehmen Druckfarbe an, während hydrophile Bereiche farbfrei bleiben. Offset printing is still the dominant technology in printing processes. It is an indirect printing process that is used in newspaper, magazine, catalog and packaging printing, etc. In offset printing, a printing plate is created, typically a thin aluminum plate. This is clamped on a Plattenzyl indians and is in the printing press with dyeing and dampening in conjunction. Lipophilic areas of the printing form accept ink while hydrophilic areas remain colorless.
Von dem Plattenzylinder wird die Druckfarbe auf das Drucktuch übertragen, das auf einem Gummituchzylinder oder Offsetzylinder montiert ist. Der Gummituchzylinder überträgt die Farbe dann mit Hilfe eines Gegendruckzylinders oder eines weiteren Gummituchzylinders auf das zu bedruckende Medium. From the plate cylinder, the ink is transferred to the blanket mounted on a blanket cylinder or offset cylinder. The blanket cylinder then transfers the ink to the medium to be printed using a counter-pressure cylinder or another blanket cylinder.
Um einen gleichmäßige Farbfilm zu erzielen, wird die Farbe aus dem Reservoir über ein spezielles Farbwerk aufgebracht. In dem Farbwerk wird die Farbe über den Farbstuhl typischerweise mittels einer Vielzahl von Walzen transportiert. Dabei wechseln sich starre Walzen (Reiberwalzen) und elastische Walzen (Farbwalzen) ab. To achieve a uniform color film, the color is applied from the reservoir via a special inking unit. In the inking unit, the ink is typically transported via the stool by means of a plurality of rollers. Here, rigid rollers (distributor rollers) and elastic rollers (ink rollers) alternate.
Die Reiberwalzen bestehen typischerweise aus einem Stahlkern mit einer Beschichtung aus Rilsan und werden daher oft auch als Rilsanwalzen bezeichnet. Diese werden üblicherweise in folgendem Verfahren hergestellt : Der blanke Stahlkern wird erhitzt und dann in ein Bad aus Rilsanpulver (einer speziellen Sorte Polyamid) drehend eingeführt. Das Rilsanpulver schmilzt im Kontakt mit dem heißen Kern und sorgt so für eine relativ gleichmäßige Beschichtung . Die Oberflächenqualität der Beschichtung ist für die Anwendung im Offsetdruck bei weitem nicht ausreichend, so dass sie z. B. über einen Schleifprozess bearbeitet werden muss. Nachteile dieser Methode sind Kosten (teurer Schleifprozess sowie Abtragen von zuvor aufgebrachtem Material) und eine hohe Schichtdicke. Es ist aufwändig, Schichtdicken unterhalb von ca. 100 pm zu erzielen. Dies ist jedoch insbesondere wünschenswert, wenn man mit innen-gekühlten Reiberwalzen arbei- tet, wie es heute bei vielen Druckmaschinen notwendig ist. Eine zu d icke Beschichtung verhindert einen effektiven Wärmeabfluss von der Oberfläche der Reiberwalze. The distributor rollers typically consist of a steel core with a coating of Rilsan and are therefore often referred to as Rilsanwalzen. These are usually made in the following process: The bare steel core is heated and then introduced into a bath of Rilsan powder (a special grade of polyamide) rotating. The Rilsan powder melts in contact with the hot core, ensuring a relatively uniform coating. The surface quality of the coating is far from sufficient for use in offset printing, so they z. B. must be processed via a grinding process. Disadvantages of this method are costs (expensive grinding process and removal of previously applied material) and a high layer thickness. It is costly to achieve layer thicknesses below about 100 pm. However, this is particularly desirable when working with internally cooled distributor rollers, as is the case today with many printing presses. Too thick a coating prevents effective heat transfer from the surface of the distributor roller.
EP 0 942 833 Bl beschreibt eine Farbwalze, bei der auf einer Walze ein elastomeres Beschichtungsmaterial beispielsweise polymeres Nitrilbutadien, Phenolharz, Epoxyharz, Polyurethan und weitere Materialien aufgebracht werden. EP 0 942 833 B1 describes an inking roller in which an elastomeric coating material, for example polymeric nitrile butadiene, phenolic resin, epoxy resin, polyurethane and other materials are applied to a roller.
DE 10 2007 062 940 beschreibt Walzen, wobei der Bezug zumindest überwiegend aus fluorierten Polymeren besteht. DE 10 2007 062 940 describes rollers, wherein the cover consists at least predominantly of fluorinated polymers.
Aufgabe der vorliegenden Erfindung war es, Verfahren zur Herstellung von Walzen und Walzen bereitzustellen, d ie d ie oben genannten Nachteile des Standes der Technik überwinden. The object of the present invention was to provide processes for producing rolls and rolls, which overcomes the above-mentioned disadvantages of the prior art.
Gelöst wird die Aufgabe durch ein Verfahren zur Herstellung einer starren Walze umfassend die Schritte: The object is achieved by a method for producing a rigid roller comprising the steps:
- Bereitstellen eines Walzenkerns - Providing a roll core
- Aufbringen einer flüssigen Beschichtungsmasse auf Basis eines Polyimid- oder Polyamidimid-Präpolymers mit einer Schichtdicke von 1 bis 1.000 pm- Applying a liquid coating composition based on a polyimide or polyamide-imide prepolymer having a layer thickness of 1 to 1000 pm
- Verfestigen der flüssigen Beschichtungsmasse auf dem Walzenkern, wobei die Walze innentemperiert ist. - Solidifying the liquid coating composition on the roll core, wherein the roller is temperature-controlled.
Erfindungsgemäß wird also im ersten Schritt ein Walzenkern bereitgestellt. Typische Walzenkerne bestehen aus Metall, insbesondere Stahl und Aluminium. Es kann sich aber auch um nicht-metallische Walzenkerne, beispielsweise aus Keramik, Glasfaser verstärktem Kunststoff (GfK) oder kohlenstofffaserverstärkten Kunststoff (CfK) handeln. According to the invention, therefore, a roll core is provided in the first step. Typical roll cores are made of metal, especially steel and aluminum. But it may also be non-metallic roll cores, for example ceramic, glass fiber reinforced plastic (GfK) or carbon fiber reinforced plastic (CfK) act.
Der erfindungsgemäße Walzenkern ist für eine innentemperierte Walze. Innentemperierte Walzen sind Walzen, die mit Hilfe eines Temperiermediums tem- periert werden können. Das Temperiermedium kann eine Flüssigkeit oder auch temperierte Luft sein . Übl icherweise werden Temperierungen zur Kühlung eingesetzt. Entsprechende Walzen sind beispielsweise aus der DE 93 169 324 bekannt. The roll core according to the invention is for an intemperated roll. Innertemperierte rollers are rollers that can be tempered using a tempering medium. The tempering medium may be a liquid or tempered air. Usually, tempering is used for cooling. Corresponding rolls are known for example from DE 93 169 324.
Der Walzenkern kann in einer Ausführungsform eine Rauigkeit Rz von 0,1 bis 100 pm, bevorzugt 1 bis 30 pm aufweisen. In one embodiment, the roll core may have a roughness Rz of 0.1 to 100 μm, preferably 1 to 30 μm.
Auf diesen Walzenkern wird eine flüssige Beschichtungsmasse aufgebracht. Die Beschichtungsmasse umfasst im Wesentlichen ein Polyimid- oder Polyamid-Präpolymere. Polyim ide si nd Polymere, d ie (C = 0)-NR-(C=0)-Gruppe enthalten. Polyamidimide ist ein aus Polyimid (C=0)-NR-(C=0)- und Polyamideinheiten (C=0)-NR2 bestehendes Copolymer. Ausgangsstoffe für die Herstellung von Polyimiden sind bevorzugt aromatische und aliphatische Diamine mit aromatischen Tetracarbonsäuredianhydriden; statt der Diamine können auch Diisocyanate eingesetzt werden . Im ersten Schritt entsteht eine Polyamidsäure, d ie dann zum Polyimid weiterreag iert. Ausgangsstoffe für Polyamidimide hingegen sind bevorzugt aromatische Tricarbonsäureanhydride mit aromatischen oder aliphatischen Diaminen oder Diisocyanaten. On this roll core, a liquid coating composition is applied. The coating composition essentially comprises a polyimide or polyamide prepolymer. Polyim ide si nd polymers containing the (C = 0) -NR (C = 0) group. Polyamide-imide is a copolymer consisting of polyimide (C = O) -NR- (C = O) - and polyamide (C = O) -NR 2 units. Starting materials for the preparation of polyimides are preferably aromatic and aliphatic diamines with aromatic tetracarboxylic dianhydrides; instead of the diamines, it is also possible to use diisocyanates. In the first step, a polyamic acid is formed, which then further reacts to form the polyimide. By contrast, starting materials for polyamideimides are preferably aromatic tricarboxylic anhydrides with aromatic or aliphatic diamines or diisocyanates.
Als Präpolymere werden Mischungen von reaktionsfähigen Monomeren verstanden, die schon teilweise, aber nicht vollständig zum Polymer reagiert haben. Im Falle der Polyimid- oder Polyamidimid-Präpolymere erfolgt die Aushär- tungsreaktion nach dem Auftragen auf den Walzenkern . Die Aushärtung wird durch eine Erwärmung erreicht oder beschleunigt. Als Schichtdicke hat sich ein Bereich von 1 bis 1000 pm als grundsätzlich geeignet erwiesen, wobei ein Bereich von 10 bis 200 pm, oder 20 bis 120 pm bevorzugt wird. Prepolymers are understood as meaning mixtures of reactive monomers which have already partially but not completely reacted with the polymer. In the case of the polyimide or polyamide-imide prepolymers, the curing reaction takes place after application to the roll core. Curing is achieved or accelerated by heating. As a layer thickness, a range of 1 to 1000 pm has proven to be fundamentally suitable, with a range of 10 to 200 pm, or 20 to 120 pm being preferred.
Auch wenn die Beschichtungsmasse im Wesentlichen auf Basis eines Polyimid- oder Polyamidimid-Präpolymers eingesetzt wird, kann sie weitere Stoffe enthalten, insbesondere Füllstoffe, Additive, Farbmittel, etc. Bevorzugt enthält die Beschichtungsmasse ein Polyimid- oder Polyamidimid-Präpolymer als Hauptbestandteil (> 50 Gew.%). Even if the coating composition is used essentially on the basis of a polyimide or polyamide-imide prepolymer, it can contain further substances, in particular fillers, additives, colorants, etc. The coating composition preferably contains a polyimide or polyamide-imide prepolymer as the main constituent (> 50 wt .%).
In einer Ausführungsform enthält die Beschichtungsmasse an Präpolymeren nur Polyimid-Präpolymere. In one embodiment, the coating composition of prepolymers contains only polyimide prepolymers.
In einer anderen Ausführungsform enthält die Beschichtungsmasse nur Polyamid imid- Präpolymere. In another embodiment, the coating composition contains only polyamide imide prepolymers.
In einer weiteren Ausführungsform enthält die Beschichtungsmasse sowohl Polyimid-Präpolymere als auch Polyamidimid-Präpolymere. Eine weitere Ausführungsform ist eine Walze, bei der die Beschichtungsmasse ein Polyimid-Präpolymer enthält und zusätzlich Polyamide oder Polyamidimide in der Beschichtungsmasse enthalten sind. In another embodiment, the coating composition contains both polyimide prepolymers and polyamide-imide prepolymers. Another embodiment is a roller in which the coating composition contains a polyimide prepolymer and, in addition, polyamides or polyamideimides are contained in the coating composition.
Eine weitere Ausführungsform ist eine Walze, bei der die Beschichtungsmasse anstelle von Polyimid-Präpolymeren gelöste Polyimide enthält. In einer Ausführungsform enthält die Beschichtungsmasse zusätzlich Polyamide oder Polyamidpräpolymere. Bevorzugt liegt das Verhältnis von Polyimidpräpolymeren zu Polyamiden + Polyamidpräpolymeren im Verhältnis von 10:0 bis 10:9. Insbesondere kann die Beschichtungszusammensetzung auch gelöstes Polyamidimid enthalten. Another embodiment is a roller in which the coating composition contains dissolved polyimides instead of polyimide prepolymers. In one embodiment, the coating composition additionally contains polyamides or polyamide prepolymers. The ratio of polyimide prepolymers to polyamides + polyamide prepolymers is preferably in the ratio of 10: 0 to 10: 9. In particular, the coating composition may also contain dissolved polyamide-imide.
Geeignete Verfahren zum Aufbringen der flüssigen Beschichtungsmasse sind insbesondere Sprühen, Rakeln, Dünnschichtrotationsguss oder Ring Coating. Nach dem Auftragen verfestigt sich die flüssige Beschichtungsmasse durch einen Aushärtevorgang, d .h . eine weitere Reaktion zum Polymer. Soweit das Präpolymer ein Lösungsmittel enthält, wird d ie Verfestig ung durch das Abtrocknen/Abdampfen der Lösungsmittel unterstützt. Das erfindungsgemäß aufgetragene Material ist bevorzugt von einer so gleichmäßigen, qualitativ hochwertigen Oberfläche, dass ein Schleifen der Beschichtungsmasse nach dem Verfestigen nicht erforderlich ist. Suitable methods for applying the liquid coating composition are, in particular, spraying, knife coating, thin-layer rotary casting or ring coating. After application, the liquid coating composition solidifies by a curing process, i. E. another reaction to the polymer. As far as the prepolymer contains a solvent, the solidification is assisted by the drying / evaporation of the solvents. The material applied according to the invention is preferably of such a uniform, high-quality surface that grinding of the coating composition after solidification is not required.
Dies führt zu geringen Schichtdicken für guten Wärmeabfluss sowie geringen Herstellungskosten. Außerdem weist die erfindungsgemäße Walze für den Druckprozess ausgezeichnete Eigenschafte n a uf: hohe Verschleißbeständig- keit, hohe chemische Beständigkeit, gute Farbannahme, gute Farbabgabe und gute Reinigbarkeit. Diese Eigenschaften sind auch ein Ergebnis der ungeschliffenen Oberfläche, die dadurch keine Poren aufweist und somit auch unanfällig gegen Ablagerungen aus dem Druckprozess ist. This leads to low layer thicknesses for good heat dissipation and low production costs. In addition, the roller according to the invention has excellent properties for the printing process: high wear resistance, high chemical resistance, good ink acceptance, good ink delivery and good cleanability. These properties are also a result of the uncut surface, which thus has no pores and thus is also not susceptible to deposits from the printing process.
Gegenstand der Erfindung ist auch eine starre, innentemperierte Walze, die durch das erfindungsgemäße Verfahren erhältlich ist. Die erfindungsgemäße Walze zeichnet sich aus durch einen Walzenkern und eine darauf befindliche, verfestigte, bevorzugt nicht geschliffene Beschichtung auf Polyimidbasis in einer Schichtdicke von 1 bis 1000 pm aus. The invention also provides a rigid, temperature-controlled roller, which is obtainable by the process according to the invention. The roll according to the invention is characterized by a roll core and a solidified, preferably non-polished, polyimide-based coating located thereon in a layer thickness of 1 to 1000 μm.
Die erfindungsgemäße Beschichtung der Walze kann ein Elastizitätsmodul im Bereich von 0,5 bis 500 MPa aufweisen. In einer Ausführungsform hat der Walzenkern eine Rauigkeit Rz von 0, 1 bis 100 pm, bevorzugt 1 bis 30 pm. Das Auftragen der Beschichtungsmasse kann zu einem Reduzieren der Rauigkeit führen . Im Regelfall ist die Rauigkeit der verfestigten Beschichtung geringer als die Rauigkeit des Walzenkerns. Gegenstand der Erfindung ist auch ein Verfahren zur Einstellung einer festgelegten Rauigkeit der Walze, in dem ein Walzenkern mit einer definierten Rauigkeit beschichtet wird, um eine Walze mit einer definierten Rauigkeit der Beschichtungsmasse zu erhalten. The coating of the roller according to the invention may have a modulus of elasticity in the range from 0.5 to 500 MPa. In one embodiment, the roll core has a roughness Rz of 0, 1 to 100 pm, preferably 1 to 30 pm. The application of the coating composition can lead to a reduction of the roughness. As a rule, the roughness of the solidified coating is less than the roughness of the roll core. The invention also provides a method for adjusting a predetermined roughness of the roll, in which a roll core is coated with a defined roughness to obtain a roll with a defined roughness of the coating composition.
Insbesondere eignet sich die erfindungsgemäße Walze für innentemperierte Walzen und/oder changierende Walzen . Innentemperierte Walzen werden verwendet, u m Wä rme a us dem Wa lzprozess abzuführen und damit für gleichmäßige Druckbedingungen zu sorgen . "Changieren" bedeutet, dass d ie Walze im Betrieb (d . h . im rotierenden Zustand) axial hin- und her bewegt wird, um so eine verbesserte Gleichmäßigkeit des Farbfilms zu erreichen. Die Walzen mit einer Beschichtung auf Basis von Polyimid oder Polyamidimid sind jedoch nicht nur als innentemperierte Walzen, sondern auch in ihrer nichttemperierten Form vorteilhaft. Zum einen ist ihre Herstellung dadurch erleichtert, dass ein Schleifen der Oberfläche nicht notwendig ist. Insbesondere kann durch die Wahl der Rauig keit des Walzenkerns und der Beschich- tungsdicke die Rauigkeit der Beschichtung eingestellt werden. In particular, the roll according to the invention is suitable for internally tempered rolls and / or iridescent rolls. Internal tempered rolls are used to dissipate heat to the watering process to provide even pressure conditions. "Oscillation" means that the roller is axially reciprocated during operation (i.e., in a rotating state) so as to achieve improved uniformity of the ink film. However, the rolls with a coating based on polyimide or polyamide-imide are not only advantageous as internally tempered rolls, but also in their non-tempered form. First, their production is facilitated by the fact that a grinding of the surface is not necessary. In particular, the roughness of the coating can be adjusted by selecting the roughness of the roll core and the coating thickness.
Daher ist Gegenstand der Erfindung auch die Verwendung einer starren Walze erhältlich durch ein Verfahren umfassend die Schritte: Therefore, the subject of the invention is also the use of a rigid roll obtainable by a process comprising the steps:
- Bereitstellen eines Walzenkerns - Providing a roll core
- Aufbringen einer flüssigen Beschichtungsmasse auf Basis eines Polyimid- oder Polyamidimid-Präpolymers mit einer Schichtdicke von 1 bis 1.000 pm - Applying a liquid coating composition based on a polyimide or polyamide-imide prepolymer having a layer thickness of 1 to 1000 pm
- Verfestigen der flüssigen Beschichtungsmasse auf dem Walzenkern als Reiber- oder Rilsanwalze. Gegenstand der Erfindung ist weiterhin ein Farbwerk umfassend starre Reiberwalzen und elastische Walzen, wobei mindestens eine starre Walze eine Walze ist, die erhältlich durch ein Verfahren umfassend die Schritte: - Solidifying the liquid coating composition on the roll core as Reiber- or Rilsanwalze. The invention furthermore relates to an inking unit comprising rigid distributor rollers and elastic rollers, wherein at least one rigid roller is a roller obtainable by a method comprising the steps:
- Bereitstellen eines Walzenkerns - Providing a roll core
- Aufbringen einer flüssigen Beschichtungsmasse auf Basis eines Polyimid- oder Polyamidimid-Präpolymers mit einer Schichtdicke von 1 bis 1.000 pm- Applying a liquid coating composition based on a polyimide or polyamide-imide prepolymer having a layer thickness of 1 to 1000 pm
- Verfestigen der flüssigen Beschichtungsmasse auf dem Walzenkern Solidifying the liquid coating mass on the roll core
Die erfind ungsgemäßen Walzen eig nen sich insbesondere als Reiber- und Rilsanwalzen . Ihre bevorzugten Einsatzgebiete sind im Offsetdruck. Die Erfindung wird durch die nachfolgenden Beispiele näher erläutert. The inventive rolls eig nen in particular as Reiber- and Rilsanwalzen. Her preferred fields of application are in offset printing. The invention is explained in more detail by the following examples.
Figur 1 zeigt ein Farbwerk mit einer Duktorwalze 1, einer Heberwalze 2, Reiberwalzen 3, Übertragswalzen 4 sowie Farbauftragswalzen 5. FIG. 1 shows an inking unit with a ductor roller 1, a lifting roller 2, distributor rollers 3, transfer rollers 4 and inking rollers 5.
Beispiel 1 example 1
Auf einen Stah l kern wird im Dün nsch ichtrotationsg uss eine Lösung von Polyamidsäure aufgebracht. Im rotierenden Zustand wird das Material erhitzt, so dass ein wesentlicher Anteil des Lösungsmittels verdampft. Dies führt dazu, dass die Beschichtungsmasse nach Ende der Rotation stabil bleibt. Anschließend erfolgt ein Tempern der Walze bei bis zu 250°C. Druckversuche mit einer solchen Walze erbrachten ausgezeichnete Ergebnisse. Beispiel 2 On a steel core, a solution of polyamic acid is applied in the thin-layer rotation casting. In the rotating state, the material is heated so that a substantial proportion of the solvent evaporates. This results in the coating composition remaining stable after the end of the rotation. This is followed by a tempering of the roller at up to 250 ° C. Pressure tests with such a roller gave excellent results. Example 2
Im Verfahren gemäß Beispiel 1 wurde ein Stahlkern mit einer Rauigkeit Rz von 15 pm eingesetzt. Bei einer Beschichtung mit einer Dicke von 80 pm gemäß Beispiel 1 verbleibt auf der Oberfläche ein Rz von ca. 2,2 pm . Bei einer Beschichtung mit einer Schichtdicke von 30 pm verbleibt noch ein Rz von ca. 5 pm, d .h . durch die Wahl der Beschichtungsdicke kann die Rauigkeit der Beschichtung eingestellt werden. In the method according to Example 1, a steel core with a roughness Rz of 15 pm was used. In the case of a coating with a thickness of 80 μm according to Example 1, an Rz of approximately 2.2 μm remains on the surface. In the case of a coating with a layer thickness of 30 μm, an Rz of about 5 μm remains, ie. By choosing the coating thickness, the roughness of the coating can be adjusted.
Claims
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SI201030813T SI2509797T1 (en) | 2009-12-07 | 2010-12-07 | Distributor rollers |
| EP10788320.9A EP2509797B1 (en) | 2009-12-07 | 2010-12-07 | Distributor rollers |
| PL10788320T PL2509797T3 (en) | 2009-12-07 | 2010-12-07 | Distributor rollers |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP09178216 | 2009-12-07 | ||
| PCT/EP2010/069046 WO2011069998A1 (en) | 2009-12-07 | 2010-12-07 | Oscillator rollers |
| EP10788320.9A EP2509797B1 (en) | 2009-12-07 | 2010-12-07 | Distributor rollers |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2509797A1 true EP2509797A1 (en) | 2012-10-17 |
| EP2509797B1 EP2509797B1 (en) | 2014-10-01 |
Family
ID=41786424
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP10788320.9A Active EP2509797B1 (en) | 2009-12-07 | 2010-12-07 | Distributor rollers |
Country Status (17)
| Country | Link |
|---|---|
| US (1) | US9308765B2 (en) |
| EP (1) | EP2509797B1 (en) |
| JP (1) | JP5758910B2 (en) |
| KR (1) | KR101757836B1 (en) |
| CN (1) | CN102686411B (en) |
| AR (1) | AR079307A1 (en) |
| AU (1) | AU2010330001B2 (en) |
| BR (1) | BR112012013770B1 (en) |
| CA (1) | CA2783324C (en) |
| DK (1) | DK2509797T3 (en) |
| ES (1) | ES2526255T3 (en) |
| HK (1) | HK1170987A1 (en) |
| PL (1) | PL2509797T3 (en) |
| PT (1) | PT2509797E (en) |
| RU (1) | RU2612566C2 (en) |
| SI (1) | SI2509797T1 (en) |
| WO (1) | WO2011069998A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7044316B2 (en) * | 2017-10-18 | 2022-03-30 | 富士機械工業株式会社 | Gravure printing machine |
| CN110239202B (en) * | 2019-06-26 | 2023-06-23 | 云南卓印科技有限公司 | Lithographic printing rubber water roller and preparation method thereof |
Family Cites Families (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4183298A (en) * | 1977-12-23 | 1980-01-15 | Roland Offsetmaschinenfabrik Faber & Schleicher Ag | Water cooled ink roller for printing presses |
| WO1989005732A1 (en) * | 1987-12-21 | 1989-06-29 | Kinyosha Co., Ltd | Ink roller for printing press and production thereof |
| EP0347456B1 (en) * | 1987-10-05 | 1993-10-20 | Kinyosha Co. Ltd. | Ink roller for printing press and production thereof |
| JP2643187B2 (en) * | 1987-10-05 | 1997-08-20 | 株式会社金陽社 | Ink delivery roll for inking unit and method for manufacturing the same |
| US5061533A (en) | 1988-10-11 | 1991-10-29 | Mitsubishi Rayon Company Ltd. | Roll formed of carbon fiber composite material |
| JPH0717052B2 (en) * | 1991-07-05 | 1995-03-01 | ボールドウィン プリンティング コントロールズ リミテッド | Cylinder or roller heated or cooled by using electronic cooling element and method of manufacturing the same |
| DE4140048C2 (en) * | 1991-12-05 | 1995-09-21 | Roland Man Druckmasch | Inking unit of a printing press, in particular sheet-fed offset printing press |
| JP3318136B2 (en) * | 1994-12-01 | 2002-08-26 | 株式会社リコー | Fixing device |
| EP0942833B1 (en) * | 1996-12-07 | 2001-07-18 | WESTLAND GUMMIWERKE GmbH & Co. | Color processing roller |
| DE19653911C2 (en) * | 1996-12-21 | 2003-03-27 | Roland Man Druckmasch | Printing machine roller with a color-friendly coating on the roll surface of the roller core, in particular ink roller |
| JP4073345B2 (en) * | 2003-03-24 | 2008-04-09 | 富士フイルム株式会社 | Lithographic printing method and printing apparatus |
| DE10328742B4 (en) * | 2003-06-25 | 2009-10-29 | Kba-Metronic Aktiengesellschaft | Process for applying liquid crystal agents to substrates |
| TWI461306B (en) * | 2006-07-19 | 2014-11-21 | Boettcher Gmbh & Co Felix | Stochastically laser-treated film roller |
| DE102006037615A1 (en) * | 2006-08-10 | 2008-02-14 | Felix Böttcher Gmbh & Co. Kg | Rubber rollers with rough surface |
| JP5334365B2 (en) * | 2006-10-23 | 2013-11-06 | 株式会社ミヤコシ | Dampening device for offset printing machine |
| JP2008143180A (en) * | 2006-12-07 | 2008-06-26 | Heidelberger Druckmas Ag | Printing machine equipped with washing unit for inking unit |
| DE102007062940A1 (en) * | 2007-12-21 | 2009-06-25 | Weros Technology Gmbh | Friction or transfer roller |
| US8384748B2 (en) * | 2009-07-29 | 2013-02-26 | Xerox Corporation | Fabrication of improved aluminum rollers with low adhesion and ultra/super hydrophobicity and/or oleophobicity by electrospinning technique in solid ink-jet marking |
-
2010
- 2010-12-07 ES ES10788320.9T patent/ES2526255T3/en active Active
- 2010-12-07 BR BR112012013770A patent/BR112012013770B1/en not_active IP Right Cessation
- 2010-12-07 CA CA2783324A patent/CA2783324C/en active Active
- 2010-12-07 PT PT107883209T patent/PT2509797E/en unknown
- 2010-12-07 EP EP10788320.9A patent/EP2509797B1/en active Active
- 2010-12-07 PL PL10788320T patent/PL2509797T3/en unknown
- 2010-12-07 KR KR1020127017355A patent/KR101757836B1/en active IP Right Grant
- 2010-12-07 JP JP2012542510A patent/JP5758910B2/en not_active Expired - Fee Related
- 2010-12-07 WO PCT/EP2010/069046 patent/WO2011069998A1/en active Application Filing
- 2010-12-07 AU AU2010330001A patent/AU2010330001B2/en not_active Ceased
- 2010-12-07 CN CN201080055206.4A patent/CN102686411B/en active Active
- 2010-12-07 SI SI201030813T patent/SI2509797T1/en unknown
- 2010-12-07 DK DK10788320.9T patent/DK2509797T3/en active
- 2010-12-07 AR ARP100104504A patent/AR079307A1/en active IP Right Grant
- 2010-12-07 US US13/514,527 patent/US9308765B2/en active Active
- 2010-12-07 RU RU2012128529A patent/RU2612566C2/en active
-
2012
- 2012-11-21 HK HK12111880.6A patent/HK1170987A1/en not_active IP Right Cessation
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2011069998A1 * |
Also Published As
| Publication number | Publication date |
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| AU2010330001B2 (en) | 2014-09-04 |
| US9308765B2 (en) | 2016-04-12 |
| CA2783324C (en) | 2018-09-18 |
| JP5758910B2 (en) | 2015-08-05 |
| AR079307A1 (en) | 2012-01-18 |
| SI2509797T1 (en) | 2015-01-30 |
| PL2509797T3 (en) | 2015-03-31 |
| CA2783324A1 (en) | 2011-06-16 |
| ES2526255T3 (en) | 2015-01-08 |
| PT2509797E (en) | 2015-01-05 |
| CN102686411B (en) | 2017-01-18 |
| KR101757836B1 (en) | 2017-07-26 |
| DK2509797T3 (en) | 2014-12-01 |
| JP2013512803A (en) | 2013-04-18 |
| CN102686411A (en) | 2012-09-19 |
| BR112012013770A2 (en) | 2016-04-26 |
| KR20120094088A (en) | 2012-08-23 |
| WO2011069998A1 (en) | 2011-06-16 |
| BR112012013770B1 (en) | 2020-04-14 |
| EP2509797B1 (en) | 2014-10-01 |
| HK1170987A1 (en) | 2013-03-15 |
| RU2012128529A (en) | 2014-01-20 |
| AU2010330001A1 (en) | 2012-06-21 |
| RU2612566C2 (en) | 2017-03-09 |
| US20130029051A1 (en) | 2013-01-31 |
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