EP3290221B1 - Multilayer endless printing blanket, containing at least one rigidity supports and method for its production - Google Patents

Multilayer endless printing blanket, containing at least one rigidity supports and method for its production Download PDF

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Publication number
EP3290221B1
EP3290221B1 EP17175607.5A EP17175607A EP3290221B1 EP 3290221 B1 EP3290221 B1 EP 3290221B1 EP 17175607 A EP17175607 A EP 17175607A EP 3290221 B1 EP3290221 B1 EP 3290221B1
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EP
European Patent Office
Prior art keywords
layer
yarn
printing blanket
twist
rigidity support
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EP17175607.5A
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German (de)
French (fr)
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EP3290221A1 (en
Inventor
Jens LÖSCHNER
Jürgen Fuchs
Gabriele Lindenthal
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ContiTech Elastomer Beschichtungen GmbH
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ContiTech Elastomer Beschichtungen GmbH
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    • 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
    • B41N10/00—Blankets or like coverings; Coverings for wipers for intaglio printing
    • B41N10/02—Blanket structure
    • B41N10/04—Blanket structure multi-layer
    • 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
    • B41N10/00—Blankets or like coverings; Coverings for wipers for intaglio printing
    • B41N10/02—Blanket structure
    • 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
    • B41N2210/00—Location or type of the layers in multi-layer blankets or like coverings
    • B41N2210/02—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
    • B41N2210/00—Location or type of the layers in multi-layer blankets or like coverings
    • B41N2210/04—Intermediate 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
    • B41N2210/00—Location or type of the layers in multi-layer blankets or like coverings
    • B41N2210/06—Backcoats; Back layers; Bottom layers

Definitions

  • the multilayer endless blanket includes a first layer comprising a polymer blend based on at least one elastomer, at least one further layer and at least one strength backing.
  • the invention is based on the object to provide a multilayer endless and vulcanized blanket, which is characterized by a precise and uniform straight line in the printing process.
  • the physical properties of the blanket should remain the same throughout the entire article.
  • the multilayer endless and vulcanized blanket contains a first layer which has a polymer mixture based on at least one elastomer and serves as a cover layer, at least one further layer and at least one strength member, wherein the strength member is present in thread construction and the individual Threads of the thread structure as a yarn or as a thread, wherein each a yarn or a twisted yarn with S-twist and a yarn or a twisted yarn with Z-twist are alternately parallel to each other in the running direction.
  • tpm or "t / m” means "turns per meter” and is a typical unit in textile technology in twists of all kinds.
  • the alternative unit is also “m” 1 ".
  • the yarn may in a preferred embodiment be monofilament or multifilament or in a hybrid form, i. in a combination of monofilament and multifilament.
  • the thread may be formed as a single-stage or multi-stage thread.
  • Single-ply threads are often referred to as cords. This results in further sub-thread constructions.
  • all natural or semisynthetic or synthetic materials for textile reinforcements can be used for the individual threads.
  • Synthetic materials are in particular synthetic polymers, such as polyacrylonitrile, polypropylene, polyester, polyamide, polyurethane, polyphenylene sulfide, polyoxadiazole, aramids, such as p-aramid, m-aramid or co-poly para aramid, polyimide, polyetherimide, polyetheretherketone, polyethylene 2,6-naphthalate, polyphenylene, polyphenylene oxide, polyphenylene sulfide, polyphenylene ethers, polybenzoxazoles, polyvinyl alcohol in question.
  • the semisynthetic materials may, for example, be modal, viscose or lyocell.
  • the natural materials may be rock wool or cotton, flax or hemp, or wool or silk.
  • Inorganic materials such as glass, ceramics, carbon (carbon), metal or rock, such as basalt, are also conceivable.
  • the materials mentioned can be used alone or in combination, as a so-called hybrid.
  • the individual threads can also be prepared adhesive friendly.
  • the material is preferably a material that is as low in stretch as possible, such as, for example, glass, aramid, polyoxadiazole, metal or ceramic, or the material is pretreated accordingly, eg. For example, by stretching to make it low-stretch. This minimizes elongation of the end product.
  • the polymer blend of the first layer may also be a blend containing at least one thermoplastic component, ie, at least one thermoplastic elastomer (TPE) and / or at least one thermoplastic (TP), at least one rubber component which is at least partially cross-linked, and conventional blend ingredients.
  • thermoplastic components are: polyolefin, in particular polyethylene (PE) or polypropylene (PP), and / or polystyrene and / or polyamide (PA), for example PA6 or PA6.6, and / or polyester (PES).
  • EPDM, CSM, EVA or silicone rubber, in particular with no other rubber component are blended.
  • the continuous blanket preferably has a total thickness of 1 to 3mm.
  • the endless blanket still contains a built-in sensor, which enables continuous position determination and thus position monitoring. This can be recognized immediately if there are deviations in the straight-ahead, which affect the print image ugly.
  • the sensor may be metal particles and / or metal strips which are introduced at defined positions in the article, ie in one of the polymer layers and / or in the reinforcement layer. All other detectable elements can also be introduced as a sensor at defined locations. It is also possible to use ionic liquids or so-called natural or synthetic DNA markers as a sensor. The sensor is already introduced into the article during the construction of the layers. After vulcanization of the composite, the sensor is thus fixed at a defined position.
  • the invention further relates to a method for producing a multilayer endless blanket, which is characterized by a precise and uniform directional stability.
  • the vulcanization is carried out according to the invention in a Vulkanisierform. This is preferably an autoclave.

Description

Die Erfindung betrifft ein mehrschichtiges endloses und vulkanisiertes Drucktuch, das wenigstens einen Festigkeitsträger enthält und ein Verfahren zu dessen Herstellung.The invention relates to a multilayer endless and vulcanized blanket containing at least one strength carrier and a method for its production.

Das mehrschichtige endlose Drucktuch enthält eine erste Schicht, die eine Polymermischung auf Basis wenigstens eines Elastomers aufweist, wenigstens eine weitere Schicht und wenigstens einen Festigkeitsträger.The multilayer endless blanket includes a first layer comprising a polymer blend based on at least one elastomer, at least one further layer and at least one strength backing.

Drucktücher, wie bspw. in EP 0 191 779 B2 beschrieben, sind mehrschichtige Artikel mit einer Druckschicht aus einem polymeren Werkstoff, wenigstens einer kompressiblen oder inkompressiblen Zwischenschicht und wenigstens einer Festigkeitsträgerschicht, bestehend aus einem textilen Flächengebilde, wobei die einzelnen Schichten untereinander einen Haftverbund bilden.Blankets, such as in EP 0 191 779 B2 are multilayer articles with a printing layer of a polymeric material, at least one compressible or incompressible intermediate layer and at least one strength layer, consisting of a textile fabric, wherein the individual layers form an adhesive bond with each other.

Diese Drucktücher werden in der Regel als Bahnenware hergestellt und gemäß dem Umfang des Druckzylinders abgelängt. Die abgelängten Teile der Bahnenware sind die Formate, die beidseitig mit Montageschienen versehen im Spannkanal des Druckzylinders fixiert und gespannt werden.These blankets are usually produced as web goods and cut to length according to the circumference of the printing cylinder. The cut-to-length parts of the sheet goods are the formats that are fixed on both sides with mounting rails in the clamping channel of the printing cylinder and clamped.

Im Bereich des Spannkanals des Druckzylinders kann nicht gedruckt werden, was zu einem erhöhten Verbrauch des Bedruckstoffes führt.In the area of the clamping channel of the printing cylinder can not be printed, which leads to an increased consumption of the printing substrate.

In DE 693 14 987 T2 und DE 199 40 388 A1 werden hierzu bereits endlose Drucktücher vorgestellt, die keine Naht bzw. keinen derartigen Spannkanal aufweisen. Bisher war zum einen die Herstellung der endlosen Drucktücher im industriellen Maßstab problematisch, da hierzu spezielle Vorrichtungen benötigt werden. Des Weiteren besteht weiterhin das Problem, dass der Geradeauslauf möglichst präzise sein muss. Die insbesondere in DE 199 40 388 A1 beschriebene Verstärkungsschicht löst lediglich das Problem der Längung des Drucktuches, aber nicht in ausreichendem Maße das Problem des gleichmäßigen und präzisen Geradeauslaufs des Drucktuchs.In DE 693 14 987 T2 and DE 199 40 388 A1 For this purpose already endless blankets are presented which have no seam or no such clamping channel. Previously, on the one hand, the production of endless blankets on an industrial scale was problematic, as this special devices are needed. Furthermore, there is still the problem that the straight-ahead must be as precise as possible. The particular in DE 199 40 388 A1 described reinforcing layer solves only the problem of elongation of the blanket, but not sufficiently solves the problem of uniform and precise straight run of the blanket.

Weiterhin ist die DE4323128C bekannt, die ein mehrschichtiges endloses und vulkanisiertes Drucktuch offenbart, welches einen textilen Festigkeitsträger enthält, der zugkraftaufnehmende Kettfäden enthält, und weiterhin eine Schicht auf Basis eines Elastomers aufweist, die als Deckschicht dient.Furthermore, the DE4323128C which discloses a multi-layered endless and vulcanized blanket containing a textile reinforcing member containing tension-absorbing warp yarns, and further comprising an elastomer-based layer serving as a cover layer.

Der Erfindung liegt nun die Aufgabe zu Grunde, ein mehrschichtiges endloses und vulkanisiertes Drucktuch bereitzustellen, das sich durch einen präzisen und gleichmäßigen Geradeauslauf im Druckverfahren auszeichnet. Die physikalischen Eigenschaften des Drucktuchs sollen dabei über den gesamten Artikelumfang gleich bleiben.The invention is based on the object to provide a multilayer endless and vulcanized blanket, which is characterized by a precise and uniform straight line in the printing process. The physical properties of the blanket should remain the same throughout the entire article.

Gelöst wird diese Aufgabe dadurch, dass das mehrschichtige endlose und vulkanisierte Drucktuch eine erste Schicht, die eine Polymermischung auf Basis wenigstens eines Elastomers aufweist und als Deckschicht dient, wenigstens eine weitere Schicht und wenigstens einen Festigkeitsträger enthält, wobei der Festigkeitsträger in Fadenkonstruktion vorliegt und die einzelnen Fäden der Fadenkonstruktion als Garn oder als Zwirn vorliegen, wobei jeweils ein Garn oder ein Zwirn mit S-Drehung und ein Garn oder ein Zwirn mit Z-Drehung abwechselnd in Laufrichtung parallel nebeneinander liegen.This object is achieved in that the multilayer endless and vulcanized blanket contains a first layer which has a polymer mixture based on at least one elastomer and serves as a cover layer, at least one further layer and at least one strength member, wherein the strength member is present in thread construction and the individual Threads of the thread structure as a yarn or as a thread, wherein each a yarn or a twisted yarn with S-twist and a yarn or a twisted yarn with Z-twist are alternately parallel to each other in the running direction.

Überaschenderweise wurde festgestellt, dass sich ein deutlich präziserer und gleichmäßiger Geradeauslauf ergibt, wenn sich S-Drehung und Z-Drehung der einzelnen Fäden des endlosen Drucktuchs parallel in Laufrichtung abwechseln.Surprisingly, it has been found that there is a much more precise and even straight run when the S-twist and Z-twist of the individual threads of the endless blanket alternate in the direction of travel.

Gemäß DIN 60 900: Juli 1988 (insbesondere Teil 1 und Teil 2) gilt:

  • Garn: Linienförmiges Gebilde, das aus textilen Faserstoffen (Spinnfasern, Filamente oder Bändchen) hergestellt ist.
  • Zwirn: Alle linienförmigen textilen Gebilde, die durch Zusammendrehen (Zwirnen) von mindestens zwei Garnen hergestellt sind.
  • Drehungsrichtung Z: Kennbuchtstabe für die Z-Richtung. Die einzelnen Spinnfasern oder Filamente im Garn oder die Einfachgarne oder Vorzwirne im Zwirn sowie die einfachen und gefachten Garne und Zwirne im Umwindungsgarn liegen bei senkrecht gehaltenem Faden in Richtung des Schrägstriches des Buchstabens Z.
  • Drehungsrichtung S: Kennbuchtstabe für die S-Richtung. Die einzelnen Spinnfasern oder Filamente im Garn oder die Einfachgarne oder Vorzwirne im Zwirn sowie die einfachen und gefachten Garne und Zwirne im Umwindungsgarn liegen bei senkrecht gehaltenem Faden in Richtung des Schrägstriches des Buchstabens S.
According to DIN 60 900: July 1988 (in particular Part 1 and Part 2):
  • Yarn: Line-shaped structure made of textile fibers (staple fibers, filaments or ribbons).
  • Twisted yarn: All linear textile structures made by twisting (twining) at least two yarns.
  • Rotation direction Z: Identification letter for the Z direction. The individual staple fibers or filaments in the yarn or the single yarns or Vorzwirne in the twist and the simple and plied yarns and twists in Umwindungsgarn are perpendicular held thread in the direction of the slash of the letter Z.
  • Direction of rotation S: Identification letter for the S direction. The individual staple fibers or filaments in the yarn or the single yarns or Vorzwirne in the twist and the simple and plied yarns and twists in the Umwindungsgarn lie with vertically held thread in the direction of the slash of the letter S.

Die Kurzbezeichnung "tpm" bzw. "t/m" bedeutet "turns per meter" und ist eine typische Einheit in der Textiltechnologie bei Drehungen (engl. Twist) aller Art. Die alternative Einheit ist auch "m"1".The abbreviation "tpm" or "t / m" means "turns per meter" and is a typical unit in textile technology in twists of all kinds. The alternative unit is also "m " 1 ".

Gemäß Anspruch 1 sind somit folgende Haupt-Fadenkonstruktionen möglich:

  • Variante 1: S-Zwirn und Z-Zwirn abwechselnd parallel in Laufrichtung nebeneinander.
  • Variante 2: S-Garn und Z-Garn abwechselnd parallel in Laufrichtung nebeneinander.
  • Variante 3: S-Zwirn und Z-Garn abwechselnd parallel in Laufrichtung nebeneinander.
  • Variante 4: S-Garn und Z-Zwirn abwechselnd parallel in Laufrichtung nebeneinander.
According to claim 1, the following main thread constructions are thus possible:
  • Variant 1: S-twist and Z-twist alternately parallel in the running direction next to each other.
  • Variant 2: S-yarn and Z-yarn alternately parallel in running direction next to each other.
  • Variant 3: S-twist and Z-yarn alternately parallel to each other in the running direction.
  • Variant 4: S-yarn and Z-twine alternately parallel to each other in running direction.

Das Garn kann in einer bevorzugten Ausführungsform als Monofilament oder Multifilament oder in einer Hybridform, d.h. in einer Kombination aus Monofilament und Multifilament, vorliegen.The yarn may in a preferred embodiment be monofilament or multifilament or in a hybrid form, i. in a combination of monofilament and multifilament.

Der Zwirn kann als einstufiger oder mehrstufiger Zwirn ausgebildet sein. Einstufige Zwirne werden häufig auch als Corde bezeichnet.
Hierdurch ergeben sich weitere Unter-Fadenkonstruktionen.The thread may be formed as a single-stage or multi-stage thread. Single-ply threads are often referred to as cords.
This results in further sub-thread constructions.

Erfindungsgemäß können für die einzelnen Fäden alle natürlichen oder halbsynthetischen oder synthetischen Materialien für textile Festigkeitsträger verwendet werden.
Als synthetische Materialien kommen insbesondere synthetische Polymere, wie bspw. Polyacrylnitril, Polypropylen, Polyester, Polyamid, Polyurethan, Polyphenylensulfid, Polyoxadiazol, Aramide, wie p-Aramid, m-Aramid oder co-poly para Aramid, Polyimid, Polyetherimid, Polyetheretherketon, Polyethylen-2,6-naphthalat, Polyphenylen, Polyphenylenoxid, Polyphenylensulfid, Polyphenylenether, Polybenzoxazole, Polyvenylalkohol in Frage.
Bei den halbsynthetischen Materialien kann es sich bspw. um Modal, Viskose oder Lyocell handeln.According to the invention, all natural or semisynthetic or synthetic materials for textile reinforcements can be used for the individual threads.
Synthetic materials are in particular synthetic polymers, such as polyacrylonitrile, polypropylene, polyester, polyamide, polyurethane, polyphenylene sulfide, polyoxadiazole, aramids, such as p-aramid, m-aramid or co-poly para aramid, polyimide, polyetherimide, polyetheretherketone, polyethylene 2,6-naphthalate, polyphenylene, polyphenylene oxide, polyphenylene sulfide, polyphenylene ethers, polybenzoxazoles, polyvinyl alcohol in question.
The semisynthetic materials may, for example, be modal, viscose or lyocell.

Bei den natürlichen Materialien kann es sich um Steinwolle oder um Baumwolle, Flachs oder Hanf, oder um Wolle oder Seide, handeln.
Anorganische Materialien wie Glas, Keramik, Kohlenstoff (Carbon), Metall oder Gestein, wie bspw. Basalt, sind ebenso denkbar.
Die genannten Werkstoffe können hierbei alleine oder in Kombination, als so genannter Hybrid, verwendet werden.
Die einzelnen Fäden können zudem haftfreundlich präpariert sein.
Bevorzugt handelt es sich bei dem Material um ein möglichst von sich aus dehnungsarmes Material, wie bspw. Glas, Aramid, Polyoxadiazol, Metall oder Keramik, oder das Material wird entsprechend vorbehandelt, z. Bsp. durch Recken, um es dehnungsarm zu gestalten. Hierdurch wird eine Längung des Endproduktes minimiert.
Bevorzugt beträgt die Dehnung der parallel angeordneten Fadenkonstruktion in einer Breite von 50 mm und unter einer Belastung von 500 N 0,5 bis 1,5 % aufweisen. Die Anforderung an die Dehnungseigenschaften der einzelnen Fadenkonstruktion ist abhängig von der gewählten Ausführung, Anzahl pro Bezugsbreite und dem Material, da sich die Krafteinwirkung gleichmäßig auf die vorhandenen Fadenkonstruktionen verteilt.The natural materials may be rock wool or cotton, flax or hemp, or wool or silk.
Inorganic materials such as glass, ceramics, carbon (carbon), metal or rock, such as basalt, are also conceivable.
The materials mentioned can be used alone or in combination, as a so-called hybrid.
The individual threads can also be prepared adhesive friendly.
The material is preferably a material that is as low in stretch as possible, such as, for example, glass, aramid, polyoxadiazole, metal or ceramic, or the material is pretreated accordingly, eg. For example, by stretching to make it low-stretch. This minimizes elongation of the end product.
Preferably, the elongation of the parallel-arranged thread construction in a width of 50 mm and under a load of 500 N 0.5 to 1.5%. The requirement for the elongation properties of the individual thread construction depends on the design selected, the number per reference width and the material, since the force distribution is evenly distributed over the existing thread constructions.

Werden als Garn Filamentgarne eingesetzt, so haben diese bevorzugt eine Drehung zwischen 60 und 120 t/m.
Werden als Garne Fasergarne eingesetzt, so wird die optimale Tourenzahl der Spinnerei oder Zwirnerei für das ausgewählte Material, z.B. für Baumwolle vorzugsweise 430 bis 480 t/m, verwendet.If filament yarns are used as the yarn, they preferably have a rotation between 60 and 120 t / m.
If yarns are used as yarns, the optimum number of turns of spinning or twisting is used for the selected material, eg for cotton, preferably 430 to 480 t / m.

Erfindungsgemäß enthält das mehrschichtige endlose und vulkanisierte Drucktuch eine erste Schicht, die eine Polymermischung auf Basis wenigstens eines Elastomers aufweist.
Bei dem Elastomer handelt es sich bevorzugt um einen Kautschuk. Als Kautschukkomponenten sind insbesondere zu nennen: Ethylen-Propylen-Mischpolymerisat (EPM) und / oder Ethylen-Propylen-Dien-Mischpolymerisat (EPDM) und / oder Nitrilkautschuk (NBR) und / oder (teil)hydrierter Nitrilkautschuk (HNBR) und / oder Fluor-Kautschuk (FKM) und / oder Chloropren-Kautschuk (CR) und / oder Naturkautschuk (NR) und / oder Styrol-Butadien-Kautschuk (SBR) und / oder Isopren-Kautschuk (IR) und / oder Butylkautschuk (IIR) und / oder Brombutylkautschuk (BIIR) und / oder Chlorbutylkautschuk (CIIR) und / oder Butadien-Kautschuk (BR) und / oder Chloriertes Polyethylen (CM) und / oder Chlorsulfoniertes Polyethylen (CSM) und / oder Polyepichlorhydrin (ECO) und / oder Ethylen-Vinylacetat-Kautschuk (EVA) und / oder Acrylat-Kautschuk (ACM) und / oder Ethylen-Acrylat-Kautschuk (AEM) und / oder Silikonkautschuk (MQ, VMQ, PVMQ, FVMQ) und / oder Fluorierter Methylsilikonkautschuk (MFQ)und / oder Perfluorinierter Propylen-Kautschuk (FFPM) und/ oder Perfluorcarbon-Kautschuk (FFKM) und / oder Poyurethan (PU).
Auch der Einsatz eines Verschnittes, insbesondere in Verbindung mit einem der vorgenannten Kautschuktypen, beispielsweise ein NR/BR-Verschnitt, ist möglich. Von besonderer Bedeutung, insbesondere für Drucktücher, sind: HNBR, EPDM, oder NBR.According to the invention, the multilayer endless and vulcanized blanket comprises a first layer comprising a polymer blend based on at least one elastomer.
The elastomer is preferably a rubber. Particularly suitable rubber components are: ethylene-propylene copolymer (EPM) and / or ethylene-propylene-diene copolymer (EPDM) and / or nitrile rubber (NBR) and / or (partially) hydrogenated nitrile rubber (HNBR) and / or fluorine Rubber (FKM) and / or chloroprene rubber (CR) and / or natural rubber (NR) and / or styrene-butadiene rubber (SBR) and / or isoprene rubber (IR) and / or butyl rubber (IIR) and / or bromobutyl rubber (BIIR) and / or chlorobutyl rubber (CIIR) and / or butadiene rubber (BR) and / or chlorinated polyethylene (CM) and / or chlorosulfonated polyethylene (CSM) and / or polyepichlorohydrin (ECO) and / or ethylene-vinyl acetate rubber (EVA) and / or acrylate rubber (ACM) and / or ethylene-acrylate rubber (AEM) and / or silicone rubber (MQ, VMQ, PVMQ, FVMQ) and / or fluorinated methyl silicone rubber (MFQ) and / or perfluorinated propylene rubber (FFPM) and / or perfluorocarbon rubber (FFKM) and / or polyurethane (PU).
The use of a waste, in particular in conjunction with one of the aforementioned types of rubber, for example, a NR / BR blend, is possible. Of particular importance, especially for printing blankets, are: HNBR, EPDM, or NBR.

Die Polymermischung der ersten Schicht ist eine Kautschukmischung, die neben der Kautschukkomponente noch weitere Mischungsingredienzien enthält. Die üblichen Mischungsingredienzien umfassen wenigstens einen Vernetzer oder ein Vernetzersystem (Vernetzungsmittel und Beschleuniger). Weitere Mischungsingredienzien sind zumeist noch ein Füllstoff und/oder ein Verarbeitungshilfsmittel und/oder ein Weichmacher und/oder ein Alterungsschutzmittel sowie gegebenenfalls weitere Zusatzstoff (z.B. Farbpigmente). Diesbezüglich wird auf den allgemeinen Stand der Kautschukmischungstechnologie verwiesen.The polymer mixture of the first layer is a rubber mixture which contains, in addition to the rubber component, further mixing ingredients. The usual compounding ingredients include at least one crosslinker or crosslinker system (crosslinker and accelerator). Other compounding ingredients are usually still a filler and / or a processing aid and / or a plasticizer and / or an anti-aging agent and optionally further additives (for example color pigments). In this regard, reference is made to the general state of rubber mixing technology.

Die Polymermischung der ersten Schicht kann ebenso eine Mischung, enthaltend wenigstens eine Thermoplastkomponente, d.h. wenigstens ein thermoplastisches Elastomer (TPE) und / oder wenigstens ein Thermoplast (TP), wenigstens eine Kautschukkomponente, die zumindest teilvernetzt ist, sowie übliche Mischungsingredienzien, sein. Bevorzugte Thermoplastkomponenten sind hierbei: Polyolefin, insbesondere Polyethylen (PE) oder Polypropylen (PP), und / oder Polystyrol und / oder Polyamid (PA), beispielsweise PA6 oder PA6.6, und / oder Polyester (PES) Als Kautschukkomponenten sind insbesondere EPM, EPDM, CSM, EVA oder Silikonkautschuk zu nennen, die insbesondere mit keiner weiteren Kautschukkomponente verschnitten sind.The polymer blend of the first layer may also be a blend containing at least one thermoplastic component, ie, at least one thermoplastic elastomer (TPE) and / or at least one thermoplastic (TP), at least one rubber component which is at least partially cross-linked, and conventional blend ingredients. Preferred thermoplastic components are: polyolefin, in particular polyethylene (PE) or polypropylene (PP), and / or polystyrene and / or polyamide (PA), for example PA6 or PA6.6, and / or polyester (PES). EPDM, CSM, EVA or silicone rubber, in particular with no other rubber component are blended.

Die erste Schicht kann in einer besonderen Ausführungsform leitfähig ausgestaltet sein. Hierzu werden bspw. leitfähige Ruße, Carbonanotubes (CNT), Ionische Flüssigkeiten oder andere geeignete Zusatzstoffe in die Polymermischung eingebracht.
Das erfindungsgemäße endlose Drucktuch enthält wenigstens eine weitere Schicht, welche ebenso eine Polymermischung auf Basis wenigstens eines Elastomers ist. Diese kann von der ersten Schicht qualitativ und / oder quantitativ verschieden oder gleich sein. Bezüglich der Zusammensetzung sei an dieser Stelle auf die obigen Ausführungen für die erste Schicht verwiesen. Diese Schicht kann ebenso wir die erste Schicht leitfähig ausgestaltet sein.The first layer may be designed to be conductive in a particular embodiment. For this purpose, for example, conductive carbon blacks, carbonanotubes (CNT), ionic liquids or other suitable additives are introduced into the polymer mixture.
The continuous blanket according to the invention contains at least one further layer, which is likewise a polymer mixture based on at least one elastomer. This may be qualitatively and / or quantitatively different or the same from the first layer. With regard to the composition, reference is made at this point to the above statements for the first layer. This layer can be designed to be conductive as well as the first layer.

Bevorzugt enthält das erfindungsgemäße Drucktuch wenigstens eine weitere kompressible Schicht, die als kompressible Zwischenschicht fungiert. Die Kompressibilität der Schicht wird in der Regel durch Poren erzielt, die eine so genannte Schaumstruktur bilden. Zur Erzeugung dieser Poren werden entweder Mikrokugeln, Treibmittel oder ähnliches eingesetzt.
Diese kompressible Schicht befindet sich hierbei bevorzugt zwischen der ersten Schicht, die als Deckschicht, auch als Druckschicht bezeichnet, dient und der Festigkeitsträgerschicht.
Die Kompressibilität beträgt bevorzugt 20 bis 30% bezogen auf die Gesamtdicke des Artikels. Wenn der Artikel eine Dicke von 2 mm aufweist bedeutet somit eine Kompressibilität von 25%, dass sich der Artikel mit einer definierten Kraft auf einer definierten Fläche um 0,5 mm eindrücken lässt.The printing blanket according to the invention preferably contains at least one further compressible layer which acts as a compressible intermediate layer. The compressibility of the layer is usually achieved by pores, which form a so-called foam structure. To generate these pores either microspheres, blowing agents or the like are used.
In this case, this compressible layer is preferably located between the first layer, which serves as cover layer, also referred to as printing layer, and the reinforcement layer.
The compressibility is preferably 20 to 30% based on the total thickness of the article. If the article has a thickness of 2 mm, a compressibility of 25% means that the article can be impressed with a defined force of 0.5 mm over a defined area.

Das endlose Drucktuch hat bevorzugt eine Gesamtdicke von 1 bis 3mm.The continuous blanket preferably has a total thickness of 1 to 3mm.

Das endlose Drucktuch ist in einer besonders bevorzugten Ausführungsform als Zylinder ausgeformt. Der Durchmesser ist hierbei im Vergleich zu Metallrückendrucktüchern und / oder unflexiblen Sleeves frei Wählbar und bevorzugt größer oder gleich 1000 mm.The endless blanket is formed in a particularly preferred embodiment as a cylinder. The diameter here is freely selectable in comparison to metal back printing blankets and / or inflexible sleeves and preferably greater than or equal to 1000 mm.

Da das endlose Drucktuch bevorzugt frei von starren Schichten, insbesondere frei von einer Schicht aus einer Metallfolie und / oder Mettalplatte ist, ist es gut zu verpacken und zu transportieren.Since the continuous blanket is preferably free of rigid layers, in particular free of a layer of a metal foil and / or Mettalplatte, it is easy to package and transport.

In einer ganz besonders bevorzugten Ausführungsform enthält das endlose Drucktuch noch einen eingebauten Sensor, der eine kontinuierliche Positionsbestimmung und somit eine Positionsüberwachung ermöglicht. Hiermit lässt sich sofort erkennen, wenn es Abweichungen im Geradeauslauf, die das Druckbild unschön beeinflussen, gibt.
Bei dem Sensor kann es sich um Metallpartikel und / oder Metallstreifen handeln, die an definierten Positionen im Artikel, d.h. in einer der Polymerschichten und / oder in der Festigkeitsträgerschicht eingebracht sind. Es können auch alle weiteren detektierbaren Elemente als Sensor an definierten Stellen eingebracht werden. Ebenso ist es möglich, Ionische Flüssigkeiten oder so genannte natürliche oder synthetische DNA-Marker als Sensor zu verwenden. Der Sensor wird bereits während des Aufbaus der Schichten in den Artikel eingebracht. Nach der Vulkanisation des Verbundes ist der Sensor damit an einer definierten Position fixiert.In a very particularly preferred embodiment, the endless blanket still contains a built-in sensor, which enables continuous position determination and thus position monitoring. This can be recognized immediately if there are deviations in the straight-ahead, which affect the print image ugly.
The sensor may be metal particles and / or metal strips which are introduced at defined positions in the article, ie in one of the polymer layers and / or in the reinforcement layer. All other detectable elements can also be introduced as a sensor at defined locations. It is also possible to use ionic liquids or so-called natural or synthetic DNA markers as a sensor. The sensor is already introduced into the article during the construction of the layers. After vulcanization of the composite, the sensor is thus fixed at a defined position.

Die Erfindung betrifft des Weiteren ein Verfahren zur Herstellung eines mehrschichtigen endlosen Drucktuchs, welches sich durch einen präzisen und gleichmäßigen Geradeauslauf auszeichnet.The invention further relates to a method for producing a multilayer endless blanket, which is characterized by a precise and uniform directional stability.

Hierzu enthält das Verfahren wenigstens folgende Verfahrensschritte:

  • Aufwickeln der unvulkanisierten ersten Schicht um einen Kern oder eine Form in einem ersten Verfahrensschritt, wobei die erste Schicht als Deckschicht dient und
  • Paralleles Aufwickeln der einzelnen Fäden des Festigkeitsträgers in Laufrichtung um den gleichen Kern oder die gleiche Form auf der sich bereits die erste unvulkanisierte Schicht befindet in wenigstens einem weiteren nachfolgenden Verfahrensschritt, wobei sich Fäden mit S-Drehung und Fäden mit Z-Drehung abwechseln, und
  • Aufwickeln der unvulkanisierten weiteren Schicht um den gleichen Kern oder die gleiche Form auf der sich bereits die erste unvulkanisierte Schicht und der Festigkeitsträger befinden in wenigstens einem weiteren Verfahrensschritt und
  • Vulkanisation des so hergestellten Rohlings in einer Vulkanisierform in wenigstens einem abschließenden Verfahrensschritt.
For this purpose, the method contains at least the following method steps:
  • Winding the unvulcanized first layer around a core or a mold in a first method step, wherein the first layer serves as a cover layer, and
  • Parallel winding of the individual threads of the reinforcement in the direction of the same core or the same shape on which already the first unvulcanized layer is in at least one further subsequent step, with threads with S-twist and threads with Z-rotation alternate, and
  • Winding the unvulcanized further layer around the same core or the same shape on which already the first unvulcanized layer and the reinforcement are in at least one further step and
  • Vulcanization of the blank thus produced in a Vulkanisierform in at least one final step.

Sollten weitere Schichten in dem mehrschichtigen endlosen Drucktuch vorhanden sein, so werden auch diese in der entsprechenden Reihenfolge auf den gleichen Kern oder die gleiche Form aufgewickelt.Should additional layers be present in the multilayer endless blanket, they too will be wound up in the appropriate order onto the same core or the same shape.

Die Vulkanisation erfolgt erfindungsgemäß in einer Vulkanisierform. Hierbei handelt es sich bevorzugt um einen Autoklaven.The vulcanization is carried out according to the invention in a Vulkanisierform. This is preferably an autoclave.

Nach Abschluss der Vulkanisation und Auskühlen des Drucktuchs ist es möglich das Drucktuch durch Schleifen auf Nennmaß zu bringen.After completion of the vulcanization and cooling of the blanket, it is possible to bring the blanket by grinding to nominal size.

Bezüglich der Zusammensetzung der einzelnen Schichten wird auf die bereits oben getroffenen Ausführungen verwiesen.With regard to the composition of the individual layers, reference is made to the statements already made above.

Die Erfindung soll nun anhand eines Ausführungsbeispiels gemäß der einzigen Figur näher erläutert werden, ohne auf diese beschränkt zu sein.The invention will now be explained in more detail with reference to an embodiment according to the single figure, without being limited thereto.

Fig. 1 zeigt einen Ausschnitt aus dem mehrschichtigen endlosen Drucktuch. Die Deckschicht 1 bildet die so genannte Druckschicht, die die Druckfarbe auf das Papier überträgt. Des Weiteren ist eine kompressible Schicht 2 vorhanden, die eine Porenstruktur aufweist. Die Festigkeitsträgerschicht 3 ist aus einzelnen Fäden gebildet, die in Laufrichtung parallel zueinander liegen. Hierbei wechseln sich Fäden mit S-Drehung (Pfeil im Uhrzeigersinn) und Fäden mit Z-Drehung (Pfeil entgegen Uhrzeigersinn) ab. Die untere Schicht 4 bildet die polymere Schicht, welche beim Drucktuch auf der Druckwalze aufliegt. Fig. 1 shows a section of the multilayer endless blanket. The cover layer 1 forms the so-called printing layer, which transfers the printing ink to the paper. Furthermore, a compressible layer 2 is present, which has a pore structure. The reinforcement layer 3 is formed of individual threads which are parallel to each other in the running direction. In this case, threads alternate with S-twist (arrow clockwise) and threads with Z-twist (arrow counterclockwise). The lower layer 4 forms the polymeric layer which rests on the printing roll on the printing blanket.

BezugszeichenlisteLIST OF REFERENCE NUMBERS (Teil der Beschreibung)(Part of the description)

1010
Mehrschichtiges endloses DrucktuchMulti-layer endless blanket
11
Erste Schicht (Deckschicht)First layer (cover layer)
22
Kompressible SchichtCompressible layer
33
Festigkeitsträger in FadenkonstruktionReinforcements in thread construction
44
Weitere SchichtAnother layer

Claims (4)

  1. Multilayer endless and vulcanized printing blanket (10), containing at least one rigidity support (3), wherein the printing blanket contains a first layer (1), which comprises a polymer blend on the basis of at least one elastomer and serves as a covering layer, at least one further layer (4) and at least one rigidity support (3), wherein the rigidity support (3) is in the form of a thread construction and the individual threads of the thread construction are in the form of a yarn or twisted yarn, wherein a yarn or a twisted yarn with S twist and a yarn or a twisted yarn with Z twist respectively lie alternately next to one another in parallel in the running direction.
  2. Multilayer endless and vulcanized printing blanket (19) according to Claim 1, characterized in that the rigidity support (3) is located between the first layer (1) and the further layer (4).
  3. Multilayer endless and vulcanized printing blanket (10) according to Claim 1 or 2, characterized in that it additionally contains at least one sensor for continuous positional determination.
  4. Method for producing a multilayer endless printing blanket (10) according to one of Claims 1 to 3, including at least the following method steps:
    - winding the unvulcanized first layer (1) around a core or a form in a first method step, wherein the first layer (1) serves as a covering layer and
    - winding in parallel the individual threads of the rigidity support (3) in the running direction around the same core or the same form on which the first unvulcanized layer is already located in at least one further subsequent method step, wherein threads with an S twist and threads with Z twist alternate, and
    - winding the unvulcanized further layer (4) around the same core or the same form on which the first vulcanized layer and the rigidity support are already located in at least one further method step and
    - vulcanizing the blank thus produced in a vulcanizing mould in at least one final method step.
EP17175607.5A 2016-08-29 2017-06-13 Multilayer endless printing blanket, containing at least one rigidity supports and method for its production Active EP3290221B1 (en)

Applications Claiming Priority (1)

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DE102016216191.1A DE102016216191A1 (en) 2016-08-29 2016-08-29 Multilayer endless article, in particular blanket, containing at least one reinforcing element and method for its production

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EP3290221A1 EP3290221A1 (en) 2018-03-07
EP3290221B1 true EP3290221B1 (en) 2019-04-24

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DE (1) DE102016216191A1 (en)

Families Citing this family (1)

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Publication number Priority date Publication date Assignee Title
CN115058810A (en) * 2022-04-05 2022-09-16 山东超越纺织有限公司 Compact siro spinning process for modal, double-resistant acrylic fibers and mulberry silk fibers

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3418864A (en) * 1963-05-16 1968-12-31 Grace W R & Co Printing blanket and method of making the same
US4548858A (en) 1984-07-27 1985-10-22 Dayco Corporation Method of making a compressible printing blanket and a compressible printing blanket produced thereby
FR2689815B1 (en) 1992-04-10 1996-05-15 Rollin Sa ENDLESS BAND-SHAPED ELEMENT IN PARTICULAR PRINTING BLANCHET
DE4323128C2 (en) * 1993-07-10 1999-05-20 Continental Ag Multi-layer printing blanket, especially offset printing blanket
US6074735A (en) * 1996-11-27 2000-06-13 Sumitomo Rubber Industries, Ltd. Printing blanket
JP3357587B2 (en) * 1997-11-14 2002-12-16 住友ゴム工業株式会社 Printing blanket
JP2000071415A (en) 1998-08-28 2000-03-07 Kin Yosha Kk Printer
DE102013104945A1 (en) * 2013-05-14 2014-11-20 Contitech Elastomer-Beschichtungen Gmbh Multilayer article, in particular blanket, comprising at least one textile fabric

Non-Patent Citations (1)

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Title
None *

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DE102016216191A1 (en) 2018-03-01

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