EP1315617B1 - Procede pour produire des plaques d'impression flexographique par gravure au laser - Google Patents

Procede pour produire des plaques d'impression flexographique par gravure au laser Download PDF

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Publication number
EP1315617B1
EP1315617B1 EP02722235A EP02722235A EP1315617B1 EP 1315617 B1 EP1315617 B1 EP 1315617B1 EP 02722235 A EP02722235 A EP 02722235A EP 02722235 A EP02722235 A EP 02722235A EP 1315617 B1 EP1315617 B1 EP 1315617B1
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EP
European Patent Office
Prior art keywords
laser
layer
filler
flexographic printing
relief
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Expired - Lifetime
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EP02722235A
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German (de)
English (en)
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EP1315617A1 (fr
Inventor
Margit Hiller
Jens Schadebrodt
Jürgen Kaczun
Dieter Niederstadt
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Flint Group Germany GmbH
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BASF Drucksysteme GmbH
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Publication of EP1315617A1 publication Critical patent/EP1315617A1/fr
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    • 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

Definitions

  • the present invention relates to a method for manufacturing of flexographic printing plates by engraving a printing relief in a laser-engravable flexographic printing element that is photochemically has cross-linked relief layer, the relief layer being transparent and is an oxidic, silicate or zeolitic Solid with a particle size between 1 and 400 nm in one Amount of 0.1 to 8 wt .-% based on the amount of all components of the Relief layer includes.
  • the direct laser engraving shows compared to conventional production advantages of flexographic printing plates.
  • a row of time-consuming procedural steps such as creating a photographic Negatives or developing and drying the printing form, can be omitted.
  • the flank shape of the individual Design relief elements using laser engraving technology individually. While with photopolymer plates the flanks of a relief point continuously from the surface to the base of the relief can diverge, one can also be laser engraved in the upper one Range of vertical or almost vertical falling edge, which is only widened, engraved in the lower area. Consequently it also comes with increasing wear and tear of the plate during the Printing process with no or at most a slight dot gain. Further details on the technique of laser engraving are shown for example in "Flexographic printing technology", p. 173 ff., 4th ed., 1999, Coating Verlag, St. Gallen, Switzerland.
  • EP-B 640 043 and EP-B 640 044 disclose single-layer and multi-layer, respectively elastomeric laser-engravable recording elements for Production of flexographic printing plates.
  • the elements consist of "reinforced" elastomeric layers.
  • elastomeric binders especially thermoplastic elastomers such as SBS, SIS or SEBS block copolymers used.
  • the reinforcement is either through certain fillers, photochemical or thermochemical Networking or combinations thereof achieved.
  • Purpose of reinforcing fillers is the mechanical properties of the laser-engravable recording elements, for example tensile strength, Improve stiffness or abrasiveness. For this larger amounts of fillers are required.
  • the examples from EP-B 640 043 disclose the addition of 10 to 25% by weight of carbon black with respect to the sum of all components of the layer as a reinforcing filler.
  • the recording materials mentioned can also still strongly colored pigments or dyes as IR absorbers Have increased sensitivity to laser radiation. Soot fulfills a double function and acts both as an IR absorber like as a reinforcing filler.
  • EP-B 640 043 therefore suggests a solution, a thick one Layer by pouring a variety of thin layers, each followed of photochemical crosslinking of each individual layer. However, this procedure is cumbersome, expensive and also requires other production facilities.
  • the relief layers should be laser-engravable Do not melt flexographic printing elements in the course of laser engraving, but rather there should be a direct transition of the breakdown products if possible take place in the gas phase.
  • the previous melting of the Layer is disadvantageous: enamel edges can be engraved Form indentations around, and the edges of the relief elements become blurred. With flexographic printing plates that have such irregularities prints will be of poor quality obtained as with printing forms without such irregularities.
  • the object of the present invention was to provide an improved method for the production of flexographic printing plates by means of laser engraving To provide with the occurrence of melting edges avoided and a significantly higher resolution can be achieved.
  • the Flexo printing elements used as the starting material for the process should be on the same production lines as conventional Flexographic printing elements can be produced.
  • a method for manufacturing transparent Flexographic printing plates by engraving a printing relief found in a laser-engravable flexographic printing element that has a transparent relief layer by photochemical Crosslinking was obtained using the relief layer 0.1 to 8% by weight, preferably 0.2 to 5% by weight of an oxidic, silicate or zeolitic solid with a particle size comprised between 1 and 400 nm.
  • a flexographic printing element is used for the method according to the invention used, which is at least one on a dimensionally stable Carrier applied, transparent and laser-engravable elastomers Has layer that has been photochemically cross-linked.
  • laser-engravable means that the Relief layer has the property of laser radiation, in particular to absorb the radiation of an IR laser, so that it in places where they are more adequate to a laser beam Intensity is exposed, removed or at least replaced.
  • the layer is preferably evaporated without melting beforehand or thermally or oxidatively decomposed so that their decomposition products in the form of hot gases, vapors, smoke or small particles are removed from the layer.
  • transparent should be understood to mean that the relief layer of the laser-engravable element as well as usual photopolymerizable flexographic printing plates largely transparent is, i.e. that structures underneath with the bare Eye can be recognized. This does not preclude that Plate can be colored to a certain extent.
  • Suitable dimensionally stable supports are in particular Foils made of metals such as steel, aluminum, copper or nickel or made of plastics such as polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polybutylene terephthalate, polyamide or polycarbonate.
  • PET polyethylene terephthalate
  • PEN polyethylene naphthalate
  • polybutylene terephthalate polyamide or polycarbonate.
  • dimensionally stable carriers come as dimensionally stable Polyester films, especially PET or PEN films or but thin, flexible supports made of aluminum or stainless steel in question.
  • Conical or cylindrical tubes can also be used as supports made of the said materials, so-called sleeves become. Glass fiber fabrics or composite materials are also suitable for sleeves made of glass fibers and suitable polymer materials.
  • the dimensionally stable Carrier coated with a suitable adhesive layer become.
  • the transparent, laser-engravable layer comprises at least one elastomeric binder.
  • elastomeric binder for laser-engravable Layer such polymers are particularly suitable polymerized the 1,3-diene monomers such as isoprene or butadiene contain.
  • binders crosslinkable olefin groups as a component the main chain (1.4 installation) or as a side group on (1.2 installation).
  • Examples include natural rubber, polybutadiene, polyisoprene, Styrene-butadiene rubber, nitrile-butadiene rubber, butyl rubber, Styrene-isoprene rubber, polynorbornene rubber or called ethylene propylene diene rubber (EPDM).
  • EPDM ethylene propylene diene rubber
  • ethylene-propylene, ethylene-acrylic ester, Ethylene vinyl acetate or acrylate rubbers are used become.
  • Modified binders can also be used are used in which crosslinkable groups by grafting reactions are introduced into the polymeric molecule.
  • binders soluble in organic solvents because these binders with aqueous printing inks or alcoholic / aqueous Inks usually have only a slight swelling exhibit.
  • thermoplastic elastomeric block copolymers of alkenyl aromatics and 1,3-dienes are particularly suitable as elastomeric binders.
  • the block copolymers can be both linear Block copolymers or radial block copolymers. Usually they are three-block copolymers of the A-B-A type, but it can also be a two-block polymer of the A-B type act, or those with several alternating elastomers and thermoplastic blocks, e.g. A-B-A-B-A. Mixtures can also be used two or more different block copolymers be used. Commercially available three-block copolymers contain often certain proportions of two-block copolymers.
  • the diene units can be 1,2- or 1,4-linked.
  • Both block copolymers can be used styrene-butadiene and styrene-isoprene type. They are commercially available, for example, under the name Kraton®. Thermoplastic elastomers can also be used Block copolymers with styrene end blocks and a statistical Styrene-butadiene middle block, available under the name Styroflex® are.
  • binder The type and amount of binder used are determined by Specialist depending on the desired properties of the relief layer selected. As a rule, an amount of 45 to 95% by weight of the binder with regard to the amount of all components of the laser-engravable Layer proven. Mixtures of different types can also be used Binders are used.
  • the relief layer is used to carry out the method according to the invention an inorganic solid was added.
  • the particle size of the solid added according to the invention is between 1 and 400 nm.
  • the particle size is preferably between 2 and 200 nm and very particularly preferably between 5 and 100 nm. It is therefore smaller than the wavelength of the visible Light.
  • the laser-engravable layer that contains the filler accordingly appears transparent.
  • At round or approximately round particles refers to the specification of the particle size the diameter, for irregularly shaped, such as for needle-shaped particles on the longest axis.
  • Under particle size is to understand the primary particle size. It understands it goes without saying for the expert that solid particles with decreasing Primary particle size increasingly for agglomeration tend, and accordingly form larger secondary particles. she therefore usually have to be used in a particular matrix be dispersed very intensely.
  • Fillers with a specific surface area between 30 and 300 m 2 / g and very particularly those with 100 to 200 m 2 / g have proven particularly useful for carrying out the method according to the invention.
  • the fillers are generally colorless.
  • the invention includes but also to use colored fillers for special applications, provided the relief layer remains transparent and the photochemical Networking of the relief layer is not affected.
  • the added filler is from the group of oxidic, silicate or zeolitic solids.
  • suitable fillers are finely divided microglass particles, such as Spheriglas® (from Potters-Ballotini).
  • fine particles can be used as silicate Bentonite or aluminosilicates such as finely divided feldspars.
  • Oxides or mixed oxides are particularly suitable as oxidic solids of the elements silicon, aluminum, magnesium, titanium or calcium suitable. These can also contain additional dopants. It goes without saying for the person skilled in the art that finely divided inorganic solids always have certain amounts of water either adsorbed superficially or chemically bound. Oxides obtained by precipitation processes can be used such as precipitated silica. Most notably pyrogenic oxides, ie by thermal decomposition, are suitable suitable starting materials obtained compounds. In particular can be fumed silica, fumed aluminum oxide, fumed aluminum-doped silicon dioxide or fumed titanium dioxide be used. Such oxides are, for example commercially available under the name Aerosil® (degussa.). The Fillers can also be mixed with suitable dispersing agents, Adhesion promoters or water repellents. It can mixtures of two or more fillers are also used become.
  • the finely divided filler used.
  • the quantity refers on the sum of all components of the laser-engravable relief layer.
  • the layer preferably comprises 0.2 to 5% by weight of the Filler and very particularly preferably 1 to 5 wt .-%.
  • the laser-engravable layer is cross-linked photochemically.
  • the laser-engravable recording layer becomes cross-linked usually added monomeric or oligomeric compounds that have polymerizable groups.
  • polymerizable or crosslinkable groups can also be components of the elastomeric binder itself, which are crosslinkable Groups in the main chain to end groups and / or can be side groups.
  • the monomers are said to be compatible with the binders and at least one polymerizable, have olefinically unsaturated group.
  • esters or amides of acrylic acid or Methacrylic acid with mono- or polyfunctional alcohols, amines, Amino alcohols or hydroxy ethers and esters, styrene or substituted styrenes, esters of fumaric or maleic acid or allyl compounds proved.
  • Suitable monomers are Butyl acrylate, 2-ethylhexyl acrylate, lauryl acrylate, 1,4-butanediol diacrylate, 1,6-hexanediol diacrylate, 1,6-hexanediol dimethacrylate, 1,9-nonanediol diacrylate, trimethylolpropane triacrylate, dioctyl fumarate, N-dodecyl maleimide.
  • Suitable oligomers can also be used olefinic groups are used. Of course you can mixtures of different monomers or oligomers are also used provided that they are compatible with each other.
  • the total amount of any monomers used is known to the person skilled in the art depending on the desired properties of the recording layer established. Among other things, it addresses itself depending on whether the polymeric binder itself is already polymerizable Groups. As a rule, however, 45% by weight regarding the amount of all components of the laser-engravable Shift must not be exceeded.
  • Photoinitiators such as benzoin or benzoin derivatives such as ⁇ -methylbenzoin or benzoin ether, benzene derivatives such as benzil ketals, acylarylphosphine oxides, acylarylphosphinic acid esters, multinuclear quinones can be used for photochemical crosslinking in a known manner, without the enumeration being restricted to this.
  • the crosslinking is carried out in a manner known per se by irradiation with actinic, that is to say chemically active, radiation.
  • UV-A radiation with a wavelength between 320 and 400 nm or UV-A / VIS radiation with a wavelength of 320 to approx. 700 nm are particularly suitable.
  • the type and amount of the photoinitiator is chosen by the person skilled in the art depending on the desired Layer properties set. For example, when using TiO 2 as a filler, he will take care to use an initiator that does not absorb below 415 nm. As a rule, the amount of photoinitiator is between 0.1 and 5% by weight.
  • the laser-engravable layer can additionally contain plasticizers.
  • suitable plasticizers are modified and unmodified natural oils and resins, alkyl, alkenyl, arylalkyl or Arylalkenyl esters of acids such as alkanoic acids, aryl carboxylic acids or phosphoric acid; synthetic oligomers or resins such as Oligostyrene, oligomeric styrene-butadiene copolymers, oligomeric ⁇ -methylstyrene / p-methylstyrene copolymers, liquid oligobutadienes, or liquid oligomeric acrylonitrile-butadiene copolymers; as well as polyterpenes, polyacrylates, polyesters or polyurethanes, polyethylene, Ethylene propylene diene rubbers or ⁇ -methyl oligo (ethylene oxide).
  • plasticizers are paraffinic mineral oils; Esters of dicarboxylic acids such as Dioctyl adipate or terephthalic acid dioctyl ester; naphthenic Plasticizers or polybutadienes with a molecular weight between 500 and 5000 g / mol. Mixtures of different plasticizers can also be used be used.
  • the amount of any included Plasticisers are chosen by the expert according to the desired hardness the pressure plate selected. It is usually below 40% by weight, preferably below 20% by weight and particularly preferably below 10% by weight with respect to the sum of all components of the photopolymerizable mixture.
  • the laser-engravable layer can also contain additives and auxiliaries such as dyes, dispersing aids or contain antistatic agents.
  • additives should generally be 10% by weight based on the amount all components of the cross-linkable, laser-engravable layer of the Do not exceed the recording element.
  • the flexographic printing element used as the starting material can also have several laser-engravable layers one above the other.
  • This Laser-engravable, cross-linkable partial layers can have the same, in approximately the same or different material composition his.
  • Such a multilayer structure, especially a two-layer structure is sometimes advantageous because thus surface properties and layer properties independent can be changed from one another to create an optimal one To achieve printing result.
  • the laser-engravable recording element can, for example, a thin laser-engravable top layer have, whose composition with a view to optimal Color transfer was selected while the composition of the underlying layer with regard to optimal hardness or Elasticity of the relief layer was selected.
  • essential to the invention is that at least the top layer is the one described Contains filler. However, it is recommended that all layers contain the filler, at least all layers up to the maximum engraved relief.
  • the laser-engravable layer can, for example, be loosened or Disperse all components in a suitable solvent and Pour on a carrier.
  • elements can have several Layers are poured onto each other.
  • the Individual layers for example, poured onto temporary supports and the layers are then joined together by lamination become.
  • the laser-engravable recording elements are preferred in a generally known manner Melt extrusion followed by calendering. used can be, for example, twin screw extruders. the In principle, a person skilled in the art is aware of the type of snail he uses must be used to ensure a very even distribution of the filler to ensure in bulk.
  • the thickness of the laser-engravable layer or all layers together is usually between 0.1 and 7 mm.
  • the fat is the specialist depending on the intended use of the Pressure plate chosen appropriately.
  • the cross-linkable, laser-engravable material used as the starting material Flexographic printing element can optionally comprise further layers.
  • Such layers include an elastomeric underlayer from another wording that is between the Carrier and the laser-engravable layer (s), and which does not necessarily have to be laser-engravable.
  • Such sub-layers can have mechanical properties of the relief printing plates are changed without the properties to influence the actual printing, relief layer.
  • So-called elastic substructures serve the same purpose itself under the dimensionally stable support of the laser-engravable Recording element are located, that is on the laser-engravable Layer facing away from the carrier.
  • the laser-engravable flexographic printing element can be used against mechanical Damage caused by, for example, PET Protective film to be protected, which is on the top Layer, and each before engraving with lasers must be removed.
  • the protective film can be used to facilitate the Peeling off also siliconized or with a suitable stripping layer be provided.
  • a printing relief is created using a laser in the cross-linked, laser-engravable layer engraved.
  • Image elements are advantageously engraved in which the flanks of the picture elements initially drop vertically and widen only in the lower area of the picture element. Thereby a good socketing of the pixels is still low Dot gain achieved. But it can also be different designed flanks of the pixels are engraved, e.g. on staircase relief.
  • CO 2 lasers with a wavelength of 10640 nm are particularly suitable for laser engraving.
  • the image information to be engraved is transferred directly from the layout computer system to the laser apparatus.
  • the laser can be operated either continuously or in pulsed mode.
  • the finely divided fillers added have a slight effect Amounts a very significant improvement in printing properties the printing form obtained. While without the addition of fillers the laser-engravable layer under the influence of laser radiation still tends to melt and melt edges can be observed are, the addition of 1% means that Eliminate melting edges completely. At the same time, the achievable Resolution significantly improved.
  • the flexographic printing plate obtained can be used directly. If desired, the flexographic printing plate obtained can still be cleaned. Such a cleaning step removes layer components which have been detached but may not yet be completely removed from the plate surface. As a rule, simple treatment with water or alcohol is completely sufficient.
  • the flexographic printing elements used as the starting material for laser engraving can also be exposed and developed conventionally using photographic negatives, without the filler content adversely affecting this process. This double usability enables particularly economical production.
  • a laser system with a rotating outer drum (Meridian Finesse, ALE) was used for the engraving tests, which is equipped with a CO 2 laser with a 250 W output line.
  • the laser beam was focused on a 20 ⁇ m diameter.
  • the flexographic printing elements to be engraved were stuck to the drum with adhesive tape and the drum was accelerated to 250 rpm (web speed on the surface of the drum: 240 cm / s).
  • two lines were used, among other things, with the laser beam with a nominal width of 20 ⁇ m at intervals of 20, 40 and 60 ⁇ m engraved in the relief layer of the flexographic printing element. evaluated was the actual received width of the lines and the width of what is actually left between the engraved lines Distance. Furthermore, the engraving depth on one completely exposed point measured.
  • a photosensitive blend of 78% by weight of a SIS block copolymer (Kraton® 1161, 12.5% by weight of acrylates, 1% by weight of photoinitiator and 8.5% by weight of auxiliaries) was in a twin-screw extruder extruded at a melt temperature of 130 ° C and discharged through a slot die. The one that emerged from the nozzle The melt was in the nip of a two-roll calender introduced. both rolls were heated to 80 ° C. Over the one calender roll was a PET film coated with an adhesive varnish inserted as base film in the calender gap and over the other a PET protective film. The sandwich composite obtained was cooled and packaged.
  • SIS block copolymer Karlon® 1161, 12.5% by weight of acrylates, 1% by weight of photoinitiator and 8.5% by weight of auxiliaries
  • the obtained photosensitive flexographic printing element was after peeling the protective film by exposing it from the front for 30 min and 30 min exposure from the back with UV-A light fully networked.
  • the plate was transparent.
  • the procedure was as in the comparative example, except that 1% by weight (based on the sum of all components of the layer) of a finely divided pyrogenic silicon dioxide with a specific surface area of 160 m 2 / g and an average primary particle size of 10 to 20 was used during the production of the flexographic printing element nm (Aerosil® R 8200, degussa.) added as filler.
  • a finely divided pyrogenic silicon dioxide with a specific surface area of 160 m 2 / g and an average primary particle size of 10 to 20 was used during the production of the flexographic printing element nm (Aerosil® R 8200, degussa.) added as filler.
  • Illustration 2 shows a micrograph of the test motif obtained.
  • the negative element is also much easier to see in the case of the filled plate.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Plasma & Fusion (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacture Or Reproduction Of Printing Formes (AREA)
  • Printing Plates And Materials Therefor (AREA)

Claims (5)

  1. Procédé pour la préparation de formes pour impression flexographique au moyen d'une gravure au laser, comportant les étapes suivantes:
    (a) Application d'au moins une couche en relief réticulable par voie photochimique sur un support stable en dimensions, tandis que la couche en relief comporte au moins un liant élastomère, un composé polymérisable, un photoinitiateur ou un système de photoinitiateurs, ainsi qu'une charge finement divisée,
    (b) réticulation sur toute la surface de la couche en relief par irradiation avec de la lumière actinique,
    (c) gravage d'un relief d'impression dans la couche en relief réticulée au moyen d'un laser,
    caractérisé par le fait qu'il s'agit pour la charge d'un solide silicaté ou zéolithique, obtenu par oxydation, ayant une taille de particules entre 1 et 400 nm et la quantité mise en oeuvre vaut de 0,1 à 8 % en poids de la quantité de tous les composants de la couche en relief, avec pour condition que la couche en relief est transparente.
  2. Procédé selon la revendication 1, caractérisé par le fait qu'on utilise 0,2 à 5 % en poids de la charge.
  3. Procédé selon la revendication 1 ou 2, caractérisé par le fait que la surface spécifique de la charge vaut de 30 à 300 m2/g.
  4. Procédé selon l'une des revendications 1 à 3, caractérisé par le fait qu'il s'agit pour la charge d'un oxyde pyrogène.
  5. Procédé selon la revendication 4, caractérisé par le fait qu'il s'agit pour l'oxyde pyrogène d'au moins un tel oxyde choisi dans le groupe du dioxyde de silicium pyrogène, du dioxyde de titane pyrogène, de l'oxyde d'aluminium pyrogène ou du dioxyde de silicium pyrogène dopé à l'aluminium.
EP02722235A 2001-03-21 2002-03-16 Procede pour produire des plaques d'impression flexographique par gravure au laser Expired - Lifetime EP1315617B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10113926A DE10113926A1 (de) 2001-03-21 2001-03-21 Verfahren zur Herstellung von Flexodruckplatten mittels Lasergravur
DE10113926 2001-03-21
PCT/EP2002/002954 WO2002076739A1 (fr) 2001-03-21 2002-03-16 Procede pour produire des plaques d'impression flexographique par gravure au laser

Publications (2)

Publication Number Publication Date
EP1315617A1 EP1315617A1 (fr) 2003-06-04
EP1315617B1 true EP1315617B1 (fr) 2003-12-17

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Country Link
US (1) US6935236B2 (fr)
EP (1) EP1315617B1 (fr)
JP (1) JP2004533343A (fr)
DE (2) DE10113926A1 (fr)
WO (1) WO2002076739A1 (fr)

Cited By (3)

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WO2010121887A1 (fr) 2009-04-23 2010-10-28 Contitech Elastomer-Beschichtungen Gmbh Produit plat multicouche présentant la forme d'un blanchet ou d'une plaque d'impression pour impression par flexographie ou typographie et doté d'une gravure laser
DE102011053748A1 (de) 2011-09-19 2013-03-21 Contitech Elastomer-Beschichtungen Gmbh Mehrschichtiges Flächengebilde zur Verwendung als Drucktuch oder Druckplatte für den Hochdruck, insbesondere den Flexodruck
DE102015213057A1 (de) * 2015-07-13 2017-01-19 Contitech Elastomer-Beschichtungen Gmbh Farbübertragungsmedium

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DE10227188A1 (de) * 2002-06-18 2004-01-08 Basf Drucksysteme Gmbh Verfahren zur Herstellung von Flexodruckformen mittels Laser-Direktgravur
DE10258668A1 (de) * 2002-12-13 2004-06-24 Basf Ag Verfahren zur Herstellung von Flexodruckformen mittels Lasergravur unter Verwendung von fotopolymeren Flexodruckelementen und fotopolymerisierbares Flexodruckelementen
US20040146806A1 (en) * 2003-01-29 2004-07-29 Roberts David H. Photo-imageable nanocomposites
DE10355991A1 (de) * 2003-11-27 2005-06-30 Basf Drucksysteme Gmbh Verfahren zur Herstellung von Flexodruckplatten mittels Lasergravur
EP1739482A4 (fr) * 2004-03-24 2009-03-25 Fujifilm Corp Procede de formation d'images, plaque d'impression lithographique et procede lithographique
DE102004025364A1 (de) * 2004-05-19 2005-12-08 Basf Drucksysteme Gmbh Verfahren zur Herstellung von Flexodruckformen mittels Laser-Direktgravur
DE102004050277A1 (de) * 2004-10-14 2006-04-27 Basf Drucksysteme Gmbh Verfahren und Vorrichtung zur Herstellung von fotopolymerisierbaren, zylindrischen, endlos-nahtlosen Flexodruckelementen
US20070134596A1 (en) * 2005-12-08 2007-06-14 Adrian Lungu Photosensitive printing element having nanoparticles and method for preparing the printing element
US8501390B2 (en) * 2006-06-27 2013-08-06 Xiper Innovations, Inc. Laser engravable flexographic printing articles based on millable polyurethanes, and method
US20080057295A1 (en) * 2006-09-01 2008-03-06 Fina Technology, Inc. Engravable board
JP4837738B2 (ja) * 2006-09-06 2011-12-14 旭化成イーマテリアルズ株式会社 感光性樹脂組成物
WO2008075451A1 (fr) * 2006-12-18 2008-06-26 Toyo Boseki Kabushiki Kaisha Cliché original gravable au laser
WO2009081899A1 (fr) 2007-12-26 2009-07-02 Toyo Boseki Kabushiki Kaisha Cliché d'impression original en relief pour gravure au laser et cliché d'impression en relief obtenu de celui-ci
US7947426B2 (en) * 2008-02-25 2011-05-24 Eastman Kodak Company Laser-engraveable flexographic printing plate precursors
US8043787B2 (en) * 2008-03-14 2011-10-25 Eastman Kodak Company Negative-working imageable elements with improved abrasion resistance
JP4258786B1 (ja) 2008-06-18 2009-04-30 東洋紡績株式会社 レーザー彫刻可能なフレキソ印刷原版
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JP2004533343A (ja) 2004-11-04
US20040089180A1 (en) 2004-05-13
DE50200155D1 (de) 2004-01-29
DE10113926A1 (de) 2002-09-26
US6935236B2 (en) 2005-08-30
EP1315617A1 (fr) 2003-06-04

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