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WO2019038595A1 - Plaque d'impression réinscriptible - Google Patents

Plaque d'impression réinscriptible Download PDF

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Publication number
WO2019038595A1
WO2019038595A1 PCT/IB2018/001058 IB2018001058W WO2019038595A1 WO 2019038595 A1 WO2019038595 A1 WO 2019038595A1 IB 2018001058 W IB2018001058 W IB 2018001058W WO 2019038595 A1 WO2019038595 A1 WO 2019038595A1
Authority
WO
WIPO (PCT)
Prior art keywords
coating
printing plate
plate according
rewritable printing
silicone compound
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
Application number
PCT/IB2018/001058
Other languages
German (de)
English (en)
Inventor
Heiko Hesse
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hescoat GmbH
Original Assignee
Hescoat GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hescoat GmbH filed Critical Hescoat GmbH
Publication of WO2019038595A1 publication Critical patent/WO2019038595A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • B41N1/00—Printing plates or foils; Materials therefor
    • B41N1/003—Printing plates or foils; Materials therefor with ink abhesive means or abhesive forming means, such as abhesive siloxane or fluoro compounds, e.g. for dry lithographic printing
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/01—Non-adhesive bandages or dressings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/56—Coatings, e.g. enameled or galvanised; Releasing, lubricating or separating agents
    • B29C33/60—Releasing, lubricating or separating agents
    • B29C33/62—Releasing, lubricating or separating agents based on polymers or oligomers
    • B29C33/64—Silicone
    • 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
    • B41N3/00—Preparing for use and conserving printing surfaces
    • B41N3/006—Cleaning, washing, rinsing or reclaiming of printing formes other than intaglio formes
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D183/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
    • C09D183/04—Polysiloxanes
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D183/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
    • C09D183/16—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers in which all the silicon atoms are connected by linkages other than oxygen atoms
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F2013/00089—Wound bandages
    • A61F2013/00217—Wound bandages not adhering to the wound
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B17/00—Methods preventing fouling
    • B08B17/02—Preventing deposition of fouling or of dust
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
    • B41C1/00—Forme preparation
    • B41C1/003—Forme preparation the relief or intaglio pattern being obtained by imagewise deposition of a liquid, e.g. by an ink jet
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
    • B41C1/00—Forme preparation
    • B41C1/02—Engraving; Heads therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
    • B41C1/00—Forme preparation
    • B41C1/02—Engraving; Heads therefor
    • B41C1/04—Engraving; Heads therefor using heads controlled by an electric information signal
    • B41C1/05—Heat-generating engraving heads, e.g. laser beam, electron beam
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
    • B41C1/00—Forme preparation
    • B41C1/06—Transferring
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
    • B41C1/00—Forme preparation
    • B41C1/10—Forme preparation for lithographic printing; Master sheets for transferring a lithographic image to the forme
    • B41C1/1041—Forme preparation for lithographic printing; Master sheets for transferring a lithographic image to the forme by modification of the lithographic properties without removal or addition of material, e.g. by the mere generation of a lithographic pattern
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
    • B41C1/00—Forme preparation
    • B41C1/18—Curved printing formes or printing cylinders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
    • B41C2210/00—Preparation or type or constituents of the imaging layers, in relation to lithographic printing forme preparation
    • B41C2210/16—Waterless working, i.e. ink repelling exposed (imaged) or non-exposed (non-imaged) areas, not requiring fountain solution or water, e.g. dry lithography or driography
    • 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
    • B41N1/00—Printing plates or foils; Materials therefor
    • B41N1/16—Curved printing plates, especially cylinders
    • B41N1/22—Curved printing plates, especially cylinders made of other substances
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
    • C08G77/60—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule in which all the silicon atoms are connected by linkages other than oxygen atoms
    • C08G77/62—Nitrogen atoms

Definitions

  • the present invention relates to a rewritable printing plate according to
  • Claim 1 as well as a use of a rewritable printing plate according to claim 17, and a method for producing a rewritable
  • Printing plates for example, for simple offset printing or for the production of high quality printed products, which special colors and
  • Color compositions are well known in the art in a wide variety and variety.
  • DE10 2006 035 955 A1 discloses a rewritable printing form for offset printing with a ceramic functional layer of
  • US 2016/0032074 A1 discloses a surface of a cured polymer provided with an additional lubricant.
  • the additional lubricant which quickly expands in the course of use, should at least temporarily provide a "slip effect" on the surface.
  • the present invention is therefore based on the object to provide a particularly easy to handle and inexpensive rewritable printing plate.
  • a rewritable printing plate according to the invention comprises a support and a coating, wherein the printing ink is applied to the coating, and the coating is visco-elastic gel-like, and at least one silicone compound and additionally at least one visco-elastic silicone compound and / or additionally at least one, preferably in the coating stored,
  • Solvent contains.
  • a rewritable printing plate according to the invention may comprise a support and a coating, wherein the ink is applied to the coating, and the coating is visco-elastic gel-like, and containing at least only one silicone compound and only additionally at least one visco-elastic silicone compound.
  • a visco-elastically gel-like coating is preferably a coating of a material having a suitably high viscosity and a very low modulus of elasticity in a range of 0.1 MPa to 30 MPa, more preferably in a range of 0.1 MPa to 20 MPa, and in particular 0.1 MPa to 15 MPa.
  • the silicone compound is preferably a crosslinkable silicone, in particular a silicone, which is accessible to crosslinking, preferably additive, or can be polymerized in the presence of catalysts and crosslinkers.
  • silicones that are suitable for release coatings for example, Dehesive 920, Dehesive 944 from Wacker Chemie AG or KNS-330 or KNS-339 from Shin-Etsu Chemical Co., Ltd.
  • a viscoelastic silicone compound is any silicone compound which is liquid at room temperature and has an E modulus> 0, for example a (poly) siloxane or a (poly) silazane.
  • crosslinking is used descriptively for at least one physical, preferably also a chemical, or a polymerizing crosslinking.
  • crosslinking may also be a hydrolysis, an anionic, a cationic, an additive, a moisture-based, a condensation-based, a hydrosilylation-based, a dehydrating, a hot or cold vulcanizing, a peroxidic, or an acidic or a cross-linking occurring in the basic area.
  • crosslinking by means of catalysts for example by means of TNPT (Tetra N-Propyl Titanate) or TNBT (Tetra N-butyl titanate), titanium tetrabutoxide or platinum, or tin, or Si-H-containing crosslinker, may also be used. or by means of (poly) silanes.
  • TNPT Tetra N-Propyl Titanate
  • TNBT Tetra N-butyl titanate
  • the silicone compound can not substantially
  • Crosslinking process stops before reaching a possible full crosslinking possible, or wherein the silicone compound from the outset a deficit on a
  • Crosslinking agent (crosslinker or catalyst) is added.
  • Silicones consist of individual siloxane units. The silicon atoms, which do not reach their octet (electron shell) by forming bonds to oxygen, are saturated with organic residues.
  • composition of the siloxane unit is given taking into account the fact that each oxygen atom is used as bridge member between every two
  • Branched polysiloxanes which have branching elements as trifunctional or tetrafunctional siloxane units.
  • Type [MnDnTn] The
  • Branching point (s) is / are either incorporated in a chain or in a ring.
  • Cyclic polysiloxanes are ring-shaped from difunctional siloxane units. Type [D n ].
  • Crosslinked polysiloxanes in this group are chain or ring-shaped
  • Silicones can be further classified according to the silicon-bonded substituents.
  • the siloxane backbone may contain various hydrocarbons, silicon functional and organofunctional groups may be present. A subdivision into non-, silicon or organofunctional is therefore expedient.
  • silicones may be silicone compounds in the sense of the invention.
  • Crucial here is that such a silicone compound may well contain unwanted impurities as additional ingredients.
  • chaining is used descriptively for molecular chains in a (polymeric) network which are either physically or chemically linked, linked or linked.
  • Chain entanglements can create physical network chain ties.
  • a resulting physical network has few, preferably none, stable nodes.
  • Preferably in the context of the invention is a reversible network.
  • a chemical crosslinking and / or linking can either by a chemical reaction, such as a condensation reaction, a
  • silicone compounds can thus be substantially either physically or chemically not fully crosslinked.
  • Silicone compound according to the invention as for example in a
  • Polymer network in contact with a solvent is the case, be observed.
  • widely cross-linked plastics elastomers
  • highly cross-linked plastics thermosetting plastics
  • Thermoplastics may be soluble and swellable, for example, depending on the temperature and / or the solvent.
  • Non-crosslinked plastics can either swell or dissolve in the medium and thereby change their physical properties, such as modulus of elasticity, Torsionsmodul or
  • hydrophilic polymer networks such. As proteins in water, and hydrophobic polymer networks such. As silicone rubbers, in organic solvents. Physically crosslinked polymer networks, such. As natural rubber, can occur in continuous swelling processes, since an equilibrium swelling occurs. These are with the solution and
  • uncrosslinked polymers can completely dissolve.
  • uncrosslinked polymers can completely dissolve.
  • the silicone compounds may be a swollen in the silicone compounds
  • a rewritable printing plate may have a coating applied to a carrier of a viscoelastic gel-like, preferably swollen, silicone compound, an additional visco-elastic silicone compound, to which, preferably in addition, a catalyst and a crosslinker are added.
  • a gel is a polymer network and a
  • Polymer network is a kind of container that has a certain volume
  • Solvent comprises. Gels are only slightly under hydrostatic pressure, but are easily deformable by scissors (thixotropy). The gel characteristics are characterized by the solid as well as the liquid phase. The gel container is specific to the particular system considered. There is a strong dependence on the polymer used and its interaction with the solvent.
  • the silicone compounds may be a gel-like, swollen network.
  • a coating in the form of a pressure, resp. viscoelastic material comprising a swollen gel-like network in which at least one non-stick additive is incorporated by at least one reject the desired substance, wherein that the non-stick additive is polymerized cross-linked so that it forms a co-network with the polymerization in the form of an interpenetrating gel and thus produces a long-lasting non-stick effect, wherein the coating has an asymmetric non-stick behavior, in particular the adhesive force opposite to the substance to be repelled orthogonal to the surface of the coating is lower than the adhesive force parallel to the surface.
  • silicone compounds in the invention with a small proportion of additional fillers such as mica, calcium carbonate,
  • Coating substantially still consists of a silicone compound.
  • fillers or media may be: hard material particles such as Al 2 O 3 or tungsten carbide; electrically conductive particles and pigments such as T1O2, carbon black or indium tin oxide; conductive polymers, as well as radiation-reactive materials such as iron-containing pigments, laser-active particles, dyes and pigments; and magnetically responsive particles; and other additives such as fluorine compounds, fats, waxes and sliding particles. Also, electrically insulating materials such as zirconia can be used.
  • Diluents and solvents such as e.g. Glycols, silanes,
  • a preferred coating of a rewritable printing plate according to the invention may, in the context of the invention, also comprise a viscoelastic gelatinous, not fully crosslinked silicone compound, wherein the silicone compound in the
  • Silicone compound containing substantially no silicone oil Composition which is less than 15 wt .-%, less than 10 wt .-%, less than 5 wt .-%, less than 2.5 wt .-%, less 1 wt .-%, preferably less than 0.5 Wt .-%, more preferably less than 0, 1 wt .-% or less than 1 wt .-% o and most preferably (within the analytical limits of determination) no silicone oil comprises (in each case based on the total weight of the silicone oil-free composition of silicone compound).
  • the visco-elastic silicone compound may be liquid at 20 ° C and diffuse in the coating and / or at a temperature up to 340 ° C, preferably up to 220 "C or up to 120 ° C, to the surface of the
  • Coating can still migrate.
  • diffusion is set forth as follows. If low molecular weight substances or solvent molecules by solid
  • Permeation takes place the mass transport in three steps: adsorption, diffusion and desorption of the migrating molecule.
  • the substance first accumulates on the surface (adsorption), this can not penetrate so it comes next to the purely physical attachment to no further mass transfer and the
  • Diffusion so the properties can change greatly. Diffusion of media, substances in polymers is influenced by many parameters. The diffusion is influenced by the morphology e.g. amorphous, crystalline regions, temperature, glass transition temperature, the properties of the polymer, for example the network, the pressure or the properties of the diffusing substances. In addition, this is subject to an influence of the interaction between the morphology e.g. amorphous, crystalline regions, temperature, glass transition temperature, the properties of the polymer, for example the network, the pressure or the properties of the diffusing substances. In addition, this is subject to an influence of the interaction between the morphology e.g. amorphous, crystalline regions, temperature, glass transition temperature, the properties of the polymer, for example the network, the pressure or the properties of the diffusing substances. In addition, this is subject to an influence of the interaction between the morphology e.g. amorphous, crystalline regions, temperature, glass transition temperature, the properties of the polymer, for example the network, the pressure or the properties
  • Silicones have e.g. a larger proportion of voids e.g. compared to polyisobutylene with the same degree of polymerization.
  • the speed of diffusion has a decisive influence here and depends on the temperature, the polymer structure and the size of the
  • Silicone compound can undergo a crosslinking reaction.
  • Hydrogenpolysiloxanes with reactive Si-H are particularly preferred
  • rewritable printing plate additionally a catalyst for the
  • Crosslinking reaction for example, a silicone-soluble platinum catalyst
  • (Karstedt catalyst) for example a platinum divinyltetramethyldisiloxane complex with 3 to 3.5% by weight of platinum from ABCR GmbH.
  • rewritable printing plate additionally another at room temperature visco-elastic silicone compound, in particular a (poly) siloxane or a
  • (Poly) silazane for example, a linear siloxane such.
  • a linear siloxane such as octamethyltrisiloxane or in particular a cyclic siloxane such.
  • decamethylcyclopentasiloxane or octamethylcyclotetrasiloxane any manufacturer or
  • methyl-substituted organopolysilazane for example Silazan KiON HTA 1500 from AZ Electronic Materials.
  • Rewritable printing plate according to the invention on a coating which consists essentially of a silicone compound.
  • contents of crosslinker and catalyst can be provided, which are present in the usual small amounts, but no further visco-elastic silicone compound.
  • a carrier applied, in particular a closed sliding film forming lubricant such as is the case with so-called silicone foul release products (coatings for counteracting algae growth).
  • silicone foul release products coatings for counteracting algae growth.
  • silicone oils, paraffins, mineral oils or polyolefins are used as lubricants. to settle on their glide film early stages of algae growth instead of on the ground. Taking along this algae growth, the lubricant thus comes directly into the sea through contact with water.
  • Such materials and effects are not suitable for the purposes of the invention for a coating of a
  • Rewritable printing plate according to the invention on a coating which consists essentially of a visco-elastic silicone compound.
  • the visco-elastic silicone compound is applied to a carrier and then dried.
  • the coated support obtained in this way constitutes a very simple embodiment of an inventive
  • Coating preferably has a coefficient of friction of 0.2 to 1.5 in a direction parallel to the surface of the coating (friction adhesion), whereby only a negligibly small, preferably no, adhesion occurs in the orthogonal direction to the surface of the coating (adhesive bond).
  • This negligible adhesion in the orthogonal direction to the surface, as well as the particularly high friction adhesion parallel to the surface can be observed as each directed depending on the surface orientation material properties.
  • coatings of a rewritable printing plate have a layer thickness of 250 nm to 2 mm, and preferably one
  • rewritable printing plate have a layer thickness of 500 nm to 2 cm, and preferably have a glass transition temperature below 0 ° C.
  • Material 1 consisting of 100 parts by weight of an inventive
  • Silicone compound with 1 part by weight of crosslinker and 0.4 parts by weight of catalyst consisting of 100 parts by weight of an inventive
  • Silicone compound with 1 part by weight of crosslinker, 0.4 parts by weight of catalyst and 30 parts by weight of a visco-elastic silicone compound 1 part by weight of crosslinker, 0.4 parts by weight of catalyst and 30 parts by weight of a visco-elastic silicone compound.
  • Material 3 consisting of 100 parts by weight of an inventive
  • Silicone compound with 1 part by weight of crosslinker, 0.4 parts by weight of catalyst and 100 parts by weight of a visco-elastic silicone compound 1.
  • Material 4 consisting of 100 parts by weight of an inventive
  • Material 5 consisting of 100 parts by weight of an inventive
  • Silicone compound with 1 part by weight of crosslinker, 0.4 parts by weight of catalyst and 40 parts by weight of a visco-elastic silicone compound 1.
  • Material 6 consisting of 100 parts by weight of an inventive
  • Silicone compound with 1 part by weight of crosslinker, 0.4 parts by weight of catalyst and 50 parts by weight of a visco-elastic silicone compound 1 part by weight of crosslinker, 0.4 parts by weight of catalyst and 50 parts by weight of a visco-elastic silicone compound.
  • Material 7 consisting of 100 parts by weight of an inventive
  • Silicone compound with 1 part by weight of crosslinker, 0.4 parts by weight of catalyst and 60 parts by weight of a visco-elastic silicone compound 1.
  • Material 8 consisting of 100 parts by weight of an inventive
  • Silicone compound with 1 part by weight of crosslinker, 0.4 part by weight of catalyst and 70 parts by weight of a visco-elastic silicone compound 1.
  • Material 9 consisting of 100 parts by weight of an inventive
  • Silicone compound with 1 part by weight of crosslinker, 0.4 parts by weight of catalyst and 80 parts by weight of a visco-elastic silicone compound 1 part by weight of crosslinker, 0.4 parts by weight of catalyst and 80 parts by weight of a visco-elastic silicone compound.
  • Material 10 consisting of 100 parts by weight of an inventive
  • Silicone compound with 1 part by weight of crosslinker, 0.4 part by weight of catalyst and 90 parts by weight of a visco-elastic silicone compound 1.
  • Material 11 consisting of a carrier material (layer of silicone resin 100
  • Material 12 consisting of 100 parts by weight of a silicone compound according to the invention with 30 parts by weight of a visco-elastic silicone compound.
  • Material 13 consisting of 100 parts by weight of an inventive
  • Silicone compound with 0.2 parts by weight of crosslinker, 0.2 parts by weight of catalyst and 30 parts by weight of a visco-elastic silicone compound.
  • Material 14 consisting of 100 parts by weight of an inventive
  • Silicone compound with 0.8 parts by weight of crosslinker and 30 parts by weight of a visco-elastic silicone compound.
  • Material 15 consisting of 100 parts by weight of a viscoelastic silicone compound according to the invention with 10 parts by weight of crosslinking agent.
  • Material 16 consisting of 100 parts by weight of a viscoelastic silicone compound according to the invention with 10 parts by weight of catalyst.
  • Material 17 consisting of 100 parts by weight of a viscoelastic silicone compound according to the invention with 2 parts by weight of catalyst.
  • Material 18 consisting of 100 parts by weight of an inventive
  • Silicone compound with 10 parts by weight of a visco-elastic silicone compound according to the invention and 20 with parts by weight of a silicone resin.
  • Material 19 consisting of 100 parts by weight of a visco-elastic silicone compound according to the invention with 2 parts by weight of catalyst and 20
  • Material 20 consisting of 100 parts by weight of a visco-elastic silicone compound according to the invention with 0.4 parts by weight of catalyst and 1 .0 parts by weight of crosslinking agent and 20 parts by weight of a visco-elastic
  • Material 21 consisting of 100 parts by weight of a visco-elastic
  • Coatings of a rewritable printing plate according to the invention have a particularly high coefficient of friction ⁇ ⁇ 0.2 to 1.5 in a direction parallel to the surface (static friction).
  • a friction coefficient of MR> 1, preferably R> 1, 1 and more preferably R> 1, 316 which is usually measured conventionally by means of a tensile test, as it could be measured, for example, in the case of material 2.
  • Higher coefficients of friction, such as R> 1, 5 or R> 2 and> 3, more preferably R> 4 are possible within the scope of the invention.
  • the samples were cleaned in advance with isopropanol and dried in each case before a measurement at different temperatures.
  • the total drying time of the material samples was either 24 hours at 25 ° C (room temperature RT), or the samples of material in the convection oven
  • a coating for a rewritable printing plate according to the invention ideally has very low modulus of elasticity values.
  • the modulus of elasticity values were measured by means of a nanoindenter of the type "Nanovea
  • coatings for a rewritable printing plate according to the invention ideally have a surface energy of typically 2 mN / m to 50 mN / m.
  • Preferred coatings have a surface energy in a range from 2 mN / m to 40 mN / m, preferably in a range from 2 mN / m to 30 mN / m, more preferably in a range from 2 mN / m to 25 mN / m, a range of 5 mN / m to 15 mN / m, and in a range of 15 mN / m to 30 mN / m, and also in a range of 26 mN / m to 45 mN / m.
  • the coatings of a rewritable printing plate according to the invention ideally have a polar fraction of a surface tension of typically 0 mN / m to 20 mN / m.
  • Preferred coatings have a polar fraction in a range from 0 mN / m to 10 mN / m, preferably in a range from 0 mN / m to 5 mN / m.
  • the coatings of a rewritable printing plate according to the invention ideally have a disperse fraction of a surface tension of typically 0 mN / m to 50 mN / m.
  • Preferred coatings have one polar fraction in a range of 2 mN / m to 50 mN / m, preferably in a range of 10 mN / m to 30 mN / m and in a range of 15 mN / m to 30 mN / m, and also in one Range from 10 mN / m to 25 mN / m.
  • Pressure plate when heated from a lower temperature to a temperature of 80 ° C, an increase in the surface energy, as shown by way of example for the material 2 in the measurement diagram of Figure 1.
  • y and x respectively contain the known quantities, that is to say the measured contact angle and the disperse and polar fraction of
  • the sought disperse and polar components of the surface energy of the solid are contained in the intercept c and the slope m. These parameters can be graphically determined using a regression line if contact angle measurements are carried out with at least two test liquids. There one
  • the material was applied to a glass plate as a carrier and, depending on
  • Solvent started only after 24 hours to volatilize the solvent with the measurement at a starting temperature of 20 ° C. Between each measurement, the samples were successively annealed for 20 minutes at respective temperature and then either the still warm
  • Measuring substrate (measurement curve "warm” in Figure 1) or cooled to room temperature measuring substrate (measurement curve “cold” in Figure 1) measured.
  • the measurements were carried out to an average temperature of 340 ° C (see Figure 1).
  • the measurements were measured using a Krüss Drop Shape Analyzer - DAS 25 according to DIN standard 55660 according to the previously described OWRK model with a drop lying on the surface of the coating at a temperature resolution of +/- 15 ° C.
  • the reference materials used for the coating were both a commercial silicone resin, Tego Nonstick 60 from Evonik, a commercial PTFE non-stick coating, a commercially available silicone elastomer, as well as a
  • Reference materials silicone resin, PTFE and sol-gel coating
  • material 1 to material 20 the respective withdrawal forces by means of tape test, with the aid of a tensile tester of the brand Zwick / Z 050, 8406 50KN Zwick GmbH & Co. KG, determined.
  • the tests were carried out at a room temperature of 22 ° C. The corresponding
  • the tape was after a rest period of 60 s with a
  • Adhesive tape up to a total length of the glued portion xi of 5 cm ( 50 mm) increased and, depending on the withdrawal angle to the withdrawal force in addition an increasing force must be applied to overcome the static friction.
  • the peel force was continuously measured and averaged, and noted at two points:
  • Point C Initial range from the beginning of the withdrawal of the adhesive tape to a deduction of 10 mm
  • Point D Area after removal of the adhesive tape from 10 mm until complete detachment after 50 mm take-off
  • the take-off angle ⁇ can be determined approximately as follows after the start of the draw by means of equation (3) as follows:
  • the withdrawal force counteracts the adhesive force of a coating of a
  • the adhesive force has a maximum value in the adhesive tape test of 1.4N for material 16.
  • the lowest value for a measured adhesive force was 0.001 N for material 3.
  • a coating has a maximum adhesive force of 1.9 N or 1.5 N, preferably 1 N, in particular 0.5 N or even 0 , 1 N, and preferably of 0.075 N, and more preferably of 0.05 N or 0.0015 N or even 0.0008 N on.
  • the value for the withdrawal force is inversely proportional to the temperature during drying: the higher the temperature, the lower the withdrawal force or the adhesive force.
  • Silicone resin of the following reference values.
  • a preferred embodiment of a rewritable printing plate according to the invention comprises a support made of a metal, for example a roller or a sheet of aluminum, copper, steel or stainless steel, or of a composite material, or of a plastic, or of an inorganic or organic or ceramic material or of a textile material, or other tissue such as a fiberglass fabric or
  • Metal fiber preferably of copper, steel or stainless steel.
  • the carrier may for example also be designed as a die, stamp, roller or half-roller.
  • the carrier can be subsequently edited, for example, bent, be.
  • the coating is structurable, preferably engravable. Suitable patterning methods are known in the printing industry.
  • Non-stick coating due to the visco-elastic gel-like property very sharp and high resolution finished and are in the range of less than 1 mm, less than 500 ⁇ , less than 20 ⁇ , preferably below 15 ⁇ , more preferably below 5 ⁇ , with areas under 2 ⁇ , preferably below 1 pm and more preferably below 0.5 pm to at most 250 nm are possible.
  • the resolution is essentially limited by the
  • Structuring method such as a structuring beam, such as a laser or electron beam, or just the edge resolution of a
  • the structured print contour edges of wettable areas of the coating can have very sharp contours which are in the range of less than 15 ⁇ m, preferably less than 10 ⁇ m, particularly preferably less than 1 ⁇ m or less than 500 nm to a maximum of 50 nm.
  • the print contours of the wettable regions are high-resolution and in the range of less than 20 ⁇ m, preferably less than 15 ⁇ m, particularly preferably less than 5 ⁇ m, and ranges less than 2 ⁇ m, preferably less than 1 ⁇ m and particularly preferably less than 2 ⁇ m 0.5 pm to a maximum of 250 nm in the context of the invention are possible.
  • the print contour edges of the wettable areas are very sharp in the range of less than 15 pm, preferably less than 10 pm, more preferably less than 1 pm or less than 500 nm to a maximum of 50 nm and are limited only by the resolution of the
  • Structuring method such as a structuring beam, such as a laser or electron beam, or just the edge resolution of a means
  • the wettability of individual regions by a particular printing ink can be increased even further, in that in addition the printing ink itself adheres to the chemical and physical properties of the ink
  • Coating of the rewritable printing plate according to the invention is still being adapted. This results, for example, alone from the requirements certain printing processes such as waterless offset printing, in which the
  • Ink contains only a very little to no water content more.
  • substances such as thickening agents, thixotropic resins, polar or non-polar solvents, or adhesives, such as oils, promotes wettability on wettable areas and the wettability on wettable areas of a coating of a novel in accordance with the invention
  • a rewritable printing plate is due to the visco-elastic behavior of their coating, for example, if this is particularly thick depending on the print medium in the range of several millimeters up to 3 centimeters, even for a printing of partly uneven or very rough
  • a rewritable printing plate according to the invention shows even at
  • a rewritable printing plate according to the invention can be designed as a film, wherein the support itself is likewise designed as a film. This has the advantage that such a rewritable printing plate is particularly flexible in handling.
  • rewritable printing plate can be used within a wide temperature range.
  • Preferred coatings are in one for at least 24 hours
  • Temperature range can be used, which can include up to 180 ° C. Furthermore, this temperature range can be increased by additives such as particles and fillers, so that Temperature ranges up to 240 ° C, especially up to 600 ° C as a function of time.
  • a rewritable printing plate according to the invention preferably those coatings which have an increase in surface energy at the first heating from a lower temperature up to 80 ° C, and which at a temperature of 100 ° C or 160 ° C or up to 220 ° C, particularly suitable coatings remain visco-elastic and gel-like even up to 260 ° C for at least 24 hours.
  • coatings which, upon first heating from a lower temperature to 80 ° C., preferably 60 ° C., have an increase in the surface energy and which at a temperature of 100 ° C. or up to 160 ° C. or up to 220 ° C., for particularly suitable coatings also remain up to 260 ° C for at least 24 hours visco-elastic and gel-like.
  • rewritable printing plate have the peculiarity that it retains its characteristic properties, namely a visco-elastic behavior and a gel-like structure at a drying to 220 ° C in particular 360 ° C, preferably even to 600 ° C. This is also particularly advantageous if such a coating is briefly dried during production, for example in a continuous furnace with hot air. Also, a drying in air, for example at 25 ° C is possible or in a vacuum or at temperatures up to - 40 ° C possible.
  • a drying by means of a, preferably thermal, radiation take place.
  • a radiation may for example be a thermal radiation with infrared light or also ultraviolet light.
  • Other radiations which are suitable for drying are entirely possible within the scope of the invention, and should not be excluded from this.
  • a drying in a plasma is possible. It has also been shown in experiments that the coatings of rewriteable printing plates according to the invention are also available at different levels Temperature change cycles remain visco-elastic and gel-like on the carrier for at least 24 hours. This has the particular advantage that when selecting the material for the carrier, the temperature expansion coefficients of the materials available for selection can be disregarded.
  • Coating is more wettable than in the other areas. This has the advantage that at the wettable areas of the coating liquid media, such as water-based or oily, preferably printing inks, adhere better than in the other areas, which are less wettable to unwettable. Through the targeted choice of wettable and wettable areas, it is thus possible for example to form a printed image for a printing process on the coating in order to turn it onto a subsequent printing operation
  • the wettability of the areas of a coating is reversible, so that wettable areas can be changed into wettable areas, preferably also during an application process or during use of a rewritable printing plate, as well as wettable areas, depending on the application requirements.
  • this process can also be described as deleting an area or
  • rewritable printing plate can thus be used again for a new printing with a new print image again.
  • the wettability of the areas of a coating of a rewritable printing plate according to the invention is reversible, so that after completion or completion of a print job or simply after the printing plate is no longer needed, the wettable areas can be deleted.
  • a rewritable printing plate according to the invention can thus be provided again with a new printed image for a new printing operation and reused.
  • the reversibility of the wettability of a coating of a rewritable printing plate according to the invention by the treatment of the wettable region with a solvent or a viscoelastic silicone compound is selectively or over the entire surface achievable.
  • solvents or viscoelastic silicone compounds are also understood as diluents and swelling agents. This visco-elastic
  • Silicone compounds may be, for example, (poly) silanes, here
  • Solvents may be, for example, dimethyl 2-methylglutarates, glycols such as di (propylene glycol) butyl ether, propylene glycol butyl ether or ethanol, aliphatic hydrocarbon mixtures, isopropanol, butyl acetate, n-hexane, benzene, toluene, mineral oils and carbon tetrachloride.
  • additional substances such as surfactants or wetting agents, which result in a better spreading of the material on the surface and / or mixing the different solvents and additional substances with one another.
  • a solvent-soaked cloth or spray with a solvent, immerse in a solvent-filled container, or otherwise bring it into contact with a solvent and allow it to act accordingly.
  • a solvent for example, a commercially available silicone solvent.
  • a preferred coating is also suitable to be applied to a flexible carrier or on a semi-tool, which is still deformed after drying of the coating, for example, a coated sheet, which is formable into a pressure roller, or a plunger ,
  • a rewritable printing plate is particularly suitable for printing paper, in particular security paper, cardboard, fabric, plastics, textiles and / or films made of plastic material, in particular chip cards, and / or metal, due to the viscoelastic gel-like property.
  • the application of the coating composition can be carried out, for example, by spraying, knife coating, dipping, printing, coil coating or flooding, wherein the carrier can also be installed in a machine, for example a printing press, and does not have to be removed from the machine during coating.
  • the method may comprise a step in which the surface or areas of the surface are exposed by means of a thermal action, such as a flame, or by irradiation, or by a chemical,
  • the wettability of a preferred coating can be produced by means of, preferably local, thermal action or radiation, for example by means of a laser, or VUV radiation (vacuum ultraviolet radiation) on the non-stick coating according to the invention. Also a chemical
  • ionization methods as well as voltage discharge methods, cooling methods or also icing methods can be used.
  • the wettability of a preferred coating can be produced by means of a selectively selective fluorination or by means of one, preferably selective, plasma.
  • the method may comprise a step in which the described, preferably structured, coating of a printing plate by treatment with a solvent or a heat treatment at least 60 ° C, to a maximum of 1200 ° C, preferably 600 ° C, makes it non-wettable.
  • a solvent or a heat treatment at least 60 ° C, to a maximum of 1200 ° C, preferably 600 ° C, makes it non-wettable.
  • Coating a printing plate by treatment of the wettable area, for example with a solvent or by heat, preferably a heat treatment or a thermally acting radiation such as infrared radiation above a temperature of 60 ° C to a maximum of 1200 ° C, preferably 600 ° C is achieved by the visco elastic silicone compound in the treatment of the
  • the method can comprise a step in which the described, preferably structured, coating of a printing plate in which the
  • visco-elastic silicone compound which leads to an unwettable surface. It is sufficient to leave the solvent for a few seconds to minutes or hours on the visco-elastic surface. This effect can be enhanced by heating the visco-elastic surface or the solvent. This can also be made non-wettable by a thermally acting radiation such as infrared radiation or heat treatment at least 60 ° C, up to 1200 ° C, preferably 600 ° C, by the visco-elastic silicone compound in the treatment of the
  • Coating itself migrated to the surface of the coating, so as to make the wettable areas again unwettable. It is sufficient if, in particular at higher temperatures from 120 ° C, the temperature effect only for a few minutes (1 to 60 min), preferably a few seconds (5s to 20 s), or long takes place.
  • the temperatures and time of exposure to temperature can be adjusted accordingly and are subject to factors such as the manner in which the wettability was produced and the visco-elastic coating itself. Such steps serve to restore (writability reversibility) a rewritable printing plate.
  • ionization methods as well as voltage discharge methods, cooling methods or also icing methods can be used.
  • the wettability of a preferred coating can be produced by means of a selectively selective fluorination or by means of one, preferably selective, plasma.
  • the advantage of the high wettability and high non-wettability of the coatings leads to an improved flow behavior of the invention
  • a preferred coating may also be applied to a support of a rewritable printing plate by a printing process.
  • a coating can only be printed on selective areas of a support with an extremely high resolution down to the nanometer range.
  • the application of the coating on the support can be done for example by means of a printing process, 3D printing process or a transfer film process.
  • the coating can already be provided with a profiling during application.
  • a rewritable printing plate produced in this way is thus also suitable for being used as a mold, preferably as a casting mold, injection mold or embossing mold, or as a stamp, so that, due to the non-sticking
  • Properties of the coating can be an impression with materials, such as a polymer or other impression medium, carried on the surface of which now the previously applied structure emerges.
  • Typical applications of rewriteable printing plates according to the invention result in the fields of the various printing techniques themselves, e.g. B. in gravure, offset or flexographic printing.
  • a preferred embodiment of a rewritable printing plate can be used in the context of the invention as a template for casting with a material, preferably polyurethane or other pourable material, wherein the wettable or non-wettable areas of the non-stick coating than
  • Negative structure are formed, and the negative structure are transmitted as a positive structure in the casting in the material.
  • a preferred embodiment of a rewritable printing plate can also be used in the context of the invention as a template for a casting with a material, preferably polyurethane or other castable material, wherein in the wettable or non-wettable areas of the
  • Non-stick coating a negative structure is formed, and the negative structure are transmitted as a positive structure in the casting in the material.
  • a particularly preferred embodiment of a rewritable printing plate may also be formed as a film, preferably without a carrier.
  • a rewritable printing plate can be produced in such a way that the material of the coating is applied to the carrier in liquid form and dried there.
  • This has the advantage that, for example, a carrier can remain within a printing press without this for the
  • the coating originally applied to the carrier can first be removed and only then replaced by a viscoelastic gel-like coating. This makes the process more flexible in its
  • rewritable printing plate in which one makes the described, preferably structured coating of a printing plate by a chemical, preferably physicochemical or physical, non-wettable action on selective areas of the surface of the coating.
  • Action comprises a treatment with a solvent and / or a viscoelastic silicone compound.
  • rewritable printing plate applicable, wherein the physical action includes a heat treatment at least 60 ° C to a maximum of 600 ° C.
  • Printing plate can be applied, wherein the described, preferably structured, coating a printing plate by a treatment with a Solvent, a visco-elastic silicone compound or annealing at least 60 ° C to 600 ° C is not wettable.
  • Figure 1 is a measurement diagram of the surface energy of material 2
  • Figure 2 is a schematic representation of a pressure plate according to the invention in cross section
  • FIG. 3 shows a cross section of a printing plate according to the invention with a
  • Figure 4 is a schematic representation of the friction and adhesion effects on the
  • FIG. 5 shows photographs of unwettable and wettable material samples of a comparative test
  • Figure 6 photographs of material samples from an adhesion test with a
  • FIG. 6b photographs of the material pattern material 2
  • FIG. 7 shows photographs of a flexibility test on material 2
  • Figure 8 shows photographs of adhesion testing on molten and cured materials
  • FIG. 9 shows photographs of material samples from a tensile direction test with an adhesive tape
  • FIG. 10 shows photographs of material samples from a non-stick test with cured lacquers, paints and lacquer raw materials
  • Figure 1 photographs of material samples from a non-stick test with liquid paints, inks and printing inks;
  • Figure 12 is a schematic representation of the adhesive tape test
  • FIG. 13 shows photographs of a deletion of a wettable region of material 1 with a visco-elastic silicone compound
  • FIG. 14 shows photographs of a migration of a visco-elastic silicone compound from material 2;
  • FIG. 15 shows photographs of material 2 from a non-stick test with printing ink
  • FIG. 16 shows photographs of material 2 from a nonstick adhesion test for erasability by means of a viscoelastic silicone compound
  • FIG. 17 shows photographs of material 2 from a non-stick test for erasability by means of a solvent
  • FIG. 18 shows photographs of material 2 from a non-stick heat erasability test
  • Figure 1 is a typical measurement diagram of the surface energy of material 2 as a material example of a coating of a novel
  • the surface energy is 13.2 mN / m at room temperature. After a heat treatment (temperature-induced
  • FIG. 2 shows a schematic illustration of a printing plate 1 according to the invention.
  • the pressure plate 1 comprises a viscoelastic gel-like coating 2, which is applied to the carrier 5.
  • the viscoelastic gel-like coating 2 contains a silicone compound, which by means of Polymer chains 8 and 8 'are indicated, and additionally embedded between the polymer chains visco-elastic silicone compound, which are indicated by the solvent molecules 9 and 9'.
  • a silicone compound which by means of Polymer chains 8 and 8 'are indicated, and additionally embedded between the polymer chains visco-elastic silicone compound, which are indicated by the solvent molecules 9 and 9'.
  • Coating 2 namely on an unwettable area 4 ', there is a thermal action by means of a laser beam 6 for structuring the surface of
  • the laser beam 6 is preferably a pulsed laser beam and is used for structuring
  • a wettable region 3 is also shown in FIG. 2, on which indicated ink 7 adheres.
  • FIG. 3 is a cross-section of a rewritable invention
  • Pressure plate 1 with the coating 2 which has a surface damage 10 shown.
  • the surface damage 10 is, for example, a crack or the like. In the case shown, the surface damage 10 in the
  • the printing ink does not adhere due to mechanical surface friction effects in the surface damage 10.
  • FIG. 4 shows a schematic representation of the friction and adhesive effects, see drawn force vectors F x (friction) and F z (adhesion) of a test body T on the surface of a coating in cross-section.
  • F x force vectors
  • F z adhsion
  • Force vector F X counteracts the static friction with a static coefficient of friction of R> 1, so that an enormous force in the direction of the force vector F X is applied to the test body T along a direction parallel to the surface of the coating. 2 to solve.
  • FIG. 5 shows photographs of unwettable and wettable material samples of a comparison test.
  • Material 2 was compared with various non-stick commercially available reference materials.
  • a green UV ink was applied to the various material samples by means of a pressure roller at room temperature and then visually judged on which material the ink wetted or did not wet.
  • FIG. 6a shows photographs of material samples from an adhesion test with an adhesive tape.
  • various material samples were stuck with the adhesive tape 3M type 396 Superbond at room temperature ( ⁇ 20 ° C.) with a contact pressure of 500 g / cm 2 and the adhesive tape was peeled off again orthogonally to the surface after a period of 60 s. It was then judged qualitatively whether it adhered to the surface or not.
  • the following test results show the excellent suitability of the material 2 over common non-stick coatings from the printing industry.
  • the adhesive tape adheres extremely strongly in the direction parallel to the surface of the material 2, can not be pulled off and tears, whereas in the orthogonal direction to the
  • Adhesive tape adheres extremely strongly in the direction parallel to the surface, can not be peeled off
  • Adhesive tape adheres very strongly to the
  • Amorphous fluoropolymer adhesive tape adheres very strongly to the
  • Adhesive tape adheres very strongly to the
  • Teflon chrome layer tape adheres very strongly to the
  • Adhesive tape adheres very strongly to the
  • Adhesive tape adheres very strongly to the
  • FIG. 6b shows photographs of material pattern material 2 from FIG. 6F VI a as an image sequence for the documentation of the adhesion test with an adhesive tape (so-called adhesive tape test).
  • FIG. 7 shows photographs of a flexibility test on material 2.
  • the material 2 was applied as a coating with a layer thickness of 200 pm to a 2 mm thick aluminum sheet as a layer-carrying carrier 5 and dried at room temperature.
  • the aluminum sheet as a carrier together with the coating was subjected to some flexibility tests as shown in photographs F VII a and F VII b. Consequently, the carrier can thus be carried out, for example, as a stamp, roller or half-roll and also be subsequently processed, for example, be bent in the case of a sheet.
  • FIG. 8 shows photographs of an adhesion test with molten
  • F VIII k PTFE coating polytetrafluoroethylene black / mica
  • F VIII 1 mica peeled off adhesive tape on which no material adheres.
  • Epoxy still adheres completely to the PTFE coating, no detachment possible
  • FIG. 9 a material pattern from a tensile direction test with a glued-on adhesive tape on the coating of material 2 is depicted in FIG. From the
  • FIG. 10 shows photographs of material samples from a non-stick test with cured paints, inks and coating raw materials. There were various paints, paints and coating raw materials on the coating of the material 2 (which was dried in advance for 24 hours at 25 ° C) at room temperature (25 ° C), then a heat treatment in an oven 240 ° C was carried out for 20 minutes , The patterns were cooled.
  • an adhesive tape (painter's crepe) was adhered with a contact pressure of 1 kg and this immediately removed. It was qualitatively assessed whether the material separates from the surface of the coating of the material 2 and sticks to the tape. This was compared with a PTFE
  • Coating polytetrafluoroethylene black / mica.
  • FX k PTFE coating polytetrafluoroethylene black / mica
  • cured offset ink with glued-on adhesive tape
  • PTFE coating polytetrafluoroethylene black / mica
  • the metallic paint could not be completely removed and adheres to the PTFE coating.
  • the paint binder could not be completely removed and adheres to the PTFE coating.
  • FIG. 11 shows photographs of material samples from a non-stick test with liquid paints, inks and printing inks.
  • Figure 1 1 different paints, inks and inks were applied to the surface of the coating of the material 2 (which was dried in advance for 24 hours at 25 ° C) at room temperature (25 ° C) liquid. After a ventilation time of 2 minutes, an adhesive tape (painter's crepe) was adhered to the liquid paints, inks and printing inks and then immediately removed. Subsequently, it was judged whether the test materials in the liquid state detach from the surface of the coating 2 of the material 2 and stick to the adhesive tape. This was compared with the behavior of the same materials on a PTFE coating.
  • the deposited media can be removed from the surface of the coating of the material 2 without any problems, whereas they are not removable from the PTFE coating.
  • FIG. 12 shows a schematic representation of the adhesive tape test.
  • the adhesive tape 15 On the non-wettable area 4, 4 'of the coating 2, the adhesive tape 15 has a total length, which results from the section length yi 1 1 and the two section lengths 12 and 13, namely the detached section length X2 and the glued distance length xi.
  • the adhesive tape is fastened in the clamp 10, which is moved along the guide 14 orthogonal to the surface of the coating 2 away from the coating 2 and the pull-off force FAbzug was measured. With increasing distance of the terminal 10 to the surface of the coating 2 takes the trigger angle beta ß.
  • an increasing force must be applied to overcome the static friction in addition.
  • FIG. 15 shows photographs of material 2 for a non-stick ink test.
  • the samples were prepared as follows. Material 2 was applied to a support of aluminum sheet with a thickness of 1 mm and at
  • Material 2 Illustration of the wetted area by means of printing on
  • FIG. 16 shows photographs of material 2 for a nonstick adhesion test for erasability of a wettable area by means of a viscoelastic silicone compound.
  • the samples were prepared as already described for FIG. 15 (see FIG. 15, F XV c).
  • a visco-elastic silicone compound t was applied and distributed over the entire surface, so that a complete wetting was present.
  • the visco-elastic silicone compound was left at 25 ° C for one hour in this area and then wiped with a cloth.
  • a commercial printing ink was applied with a rubberized hand roller and visually judged whether the wettable area became again wettable. It could be clearly stated that the wettable area was again unwettable, and thus deleted.
  • FIG. 17 shows photographs of material 2 for a non-stick test for the erasability of a wettable area by means of a solvent.
  • the samples were prepared as already described for FIG. 15 (see FIG. 15, F XV c).
  • a solvent was applied and distributed over the entire surface, so that a complete wetting was present.
  • the solvent was left at 25 ° C for one hour in this area and then wiped with a cloth.
  • a commercial printing ink was applied with a rubberized hand roller and visually judged whether the wettable area became again wettable. It could be clearly stated that the wettable area was again unwettable, and thus deleted.
  • FIG. 18 shows photographs of material 2 for an anti-sticking test for the erasability of a wettable area by means of a thermal action in the form of heat.
  • the samples were prepared as already described for FIG. 15 (see FIG. 15, F XV c).
  • the support with the thus prepared wettable portion of the surface of the material 2 was exposed in a convection oven to a thermal exposure of 150 ° C for 30 minutes.
  • a commercial ink was applied to the surface of the material with a rubberized hand roller and judged if the wettable area became again wettable. It could be clearly stated that the wettable area was again unwettable, and thus deleted.

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Abstract

L'invention concerne une plaque d'impression (1) réinscriptible comprenant un support (5) et un revêtement (2), l'encre d'impression (7) étant appliquée sur le revêtement, et le revêtement étant en gel visco-élastique et contenant au moins un composé silicone (8, 8') et en sus au moins un composé silicone visco-élastique (9, 9') et/ou en sus au moins un solvant (9, 9'), ainsi que l'utilisation d'une plaque d'impression réinscriptible, et un procédé de fabrication d'une telle plaque d'impression réinscriptible, ainsi qu'un procédé de refabrication d'une plaque d'impression réinscriptible.
PCT/IB2018/001058 2017-08-19 2018-08-19 Plaque d'impression réinscriptible Ceased WO2019038595A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DEDE102017007793.2 2017-08-19
DE102017007793 2017-08-19
DEDE102017122202.2 2017-09-25
DE102017122202.2A DE102017122202A1 (de) 2017-08-19 2017-09-25 Wiederbeschreibbare Druckplatte

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WO2019038595A1 true WO2019038595A1 (fr) 2019-02-28

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PCT/IB2018/001031 Ceased WO2019038589A2 (fr) 2017-08-19 2018-08-19 Plaque d'impression
PCT/IB2018/001058 Ceased WO2019038595A1 (fr) 2017-08-19 2018-08-19 Plaque d'impression réinscriptible
PCT/IB2018/001051 Ceased WO2019038592A1 (fr) 2017-08-19 2018-08-19 Revêtement anti-adhésif
PCT/IB2018/001061 Ceased WO2019038596A1 (fr) 2017-08-19 2018-08-19 Système d'impression

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PCT/IB2018/001031 Ceased WO2019038589A2 (fr) 2017-08-19 2018-08-19 Plaque d'impression

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PCT/IB2018/001051 Ceased WO2019038592A1 (fr) 2017-08-19 2018-08-19 Revêtement anti-adhésif
PCT/IB2018/001061 Ceased WO2019038596A1 (fr) 2017-08-19 2018-08-19 Système d'impression

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WO2019038589A3 (fr) 2019-05-02
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DE102017008415A1 (de) 2019-02-21
WO2019038589A2 (fr) 2019-02-28
WO2019038596A1 (fr) 2019-02-28
DE102017122203A1 (de) 2019-02-21

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