EP2758249B1 - Matériau d'enregistrement destiné à une impression offset - Google Patents

Matériau d'enregistrement destiné à une impression offset Download PDF

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Publication number
EP2758249B1
EP2758249B1 EP12745873.5A EP12745873A EP2758249B1 EP 2758249 B1 EP2758249 B1 EP 2758249B1 EP 12745873 A EP12745873 A EP 12745873A EP 2758249 B1 EP2758249 B1 EP 2758249B1
Authority
EP
European Patent Office
Prior art keywords
recording layer
layer
coating
recording
coating composition
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.)
Active
Application number
EP12745873.5A
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German (de)
English (en)
Other versions
EP2758249A1 (fr
Inventor
Gerhard Stork
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.)
Mitsubishi HiTec Paper Europe GmbH
Original Assignee
Mitsubishi HiTec Paper Europe 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 Mitsubishi HiTec Paper Europe GmbH filed Critical Mitsubishi HiTec Paper Europe GmbH
Publication of EP2758249A1 publication Critical patent/EP2758249A1/fr
Application granted granted Critical
Publication of EP2758249B1 publication Critical patent/EP2758249B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/50—Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording
    • B41M5/502—Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording characterised by structural details, e.g. multilayer materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M2205/00—Printing methods or features related to printing methods; Location or type of the layers
    • B41M2205/04—Direct thermal recording [DTR]
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M2205/00—Printing methods or features related to printing methods; Location or type of the layers
    • B41M2205/38—Intermediate layers; Layers between substrate and imaging layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M2205/00—Printing methods or features related to printing methods; Location or type of the layers
    • B41M2205/40—Cover layers; Layers separated from substrate by imaging layer; Protective layers; Layers applied before imaging
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M2205/00—Printing methods or features related to printing methods; Location or type of the layers
    • B41M2205/42—Multiple imaging layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/50—Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording
    • B41M5/52—Macromolecular coatings
    • B41M5/5227—Macromolecular coatings characterised by organic non-macromolecular additives, e.g. UV-absorbers, plasticisers, surfactants
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/50—Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording
    • B41M5/52—Macromolecular coatings
    • B41M5/5254—Macromolecular coatings characterised by the use of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds, e.g. vinyl polymers

Definitions

  • the invention relates to a recording material suitable for offset printing, even at higher printing speeds, which in particular does not have process- and raw-material-cost-intensive protective layers on at least one recording layer formed thereunder.
  • the present invention is directed to recording materials having at least one heat and / or pressure sensitive recording layer and / or having an ink jet receiving layer as the respective recording layer.
  • the invention also aims to the same extent to a method for producing such a recording material, suitable for offset printing, even at higher printing speeds
  • the present invention now provides a first task aspect in providing the public with a recording material which is suitable for offset printing, even at relatively high printing speeds, in which the guarantee of chemical resistance of a protective layer to be formed is less important and which nevertheless results from convincing layer sealing in the sense of of the second bullet point of the previous paragraph.
  • the new recording material should ideally and preferably have improved scratch resistance as a second task aspect.
  • Such scratch resistance implies that mutual displacement of the recording material to be proposed here in the stack does not result in visible scratch marks on the surface of the recording material and / or visible color reaction in the heat and / or pressure sensitive recording layer of the recording material to be proposed here.
  • the recording material to be proposed here has to be as particularly favorable in production as possible, in order to be still competitively priced with superior product characteristics in the current market situation.
  • the inventors are interested in the fact that the recording material to be proposed should have a good stampability, which means for the purposes of the present invention that a stamp imprint, as it is preferably used for devaluation in public transport, after 10 seconds exposure time can not be wiped dry or damp without residue.
  • the coating composition for forming a coating layer covering the recording layer and also the coating layer itself mainly comprises binder preferably selected from the list comprising ethylene-vinyl alcohol copolymer (EVOH), carboxyl group-, silanol- or diacetone-modified polyvinyl alcohol as well as unmodified polyvinyl alcohol, wherein the previously enumerated as preferred binders in a first particularly preferred embodiment alone, in a second particularly preferred embodiment in admixture with each other or in a third embodiment in admixture with other binders in the coating layer to be involved.
  • binder preferably selected from the list comprising ethylene-vinyl alcohol copolymer (EVOH), carboxyl group-, silanol- or diacetone-modified polyvinyl alcohol as well as unmodified polyvinyl alcohol, wherein the previously enumerated as preferred binders in a first particularly preferred embodiment alone, in a second particularly preferred embodiment in admixture with each other or in a third embodiment in admi
  • the binders enumerated above as preferred always contain from 50% by weight to 100% by weight, very particularly preferably from 75% by weight to 98% by weight, in each case on the total weight of the coating composition to form a coating layer covering the recording layer over its entire area.
  • the coating composition for forming a coating layer covering the recording layer and also the coating layer itself preferably contains at least one crosslinking aid selected from the list comprising boric acid, polyamine, epoxy resin, dialdehyde, formaldehyde oligomers, epiochlorohydrin resin, adipic dihydrazide, dimethylurea, melamine formaldehyde enumerated crosslinking aids should preferably be incorporated in the coating layer alone or in admixture with one another. Also, a mixture of enumerated crosslinking aids with other crosslinking aids not mentioned here is conceivable. In total, the crosslinking aids preferably constitute from 3% to 20% by weight, based on the total weight of the coating composition, of a coating layer which covers the entire surface of the recording layer.
  • pigments in particular inorganic pigments
  • the coating composition for forming a coating layer covering the recording layer over its entire surface and likewise in the coating layer itself but it represents a clearly favored embodiment if these Coating layer remains pigment-free.
  • possible further ingredients of the coating composition for forming a coating layer covering the recording layer over its entire area and also the coating layer itself are optical brighteners, optionally defoamers and flow improvers in the case of a possible application of the coating layer by means of a curtain coater.
  • a coating layer as proposed in the previous paragraphs [0004] to [0008] is capable of significantly increasing the pick resistance of the proposed recording material on the side on which the coating layer is at least applied, at a low or even justifiable economic cost and thus to improve the offset printability.
  • the scratch resistance of the proposed recording material is significantly improved on the side on which the coating layer is at least applied.
  • the recording material for offset printing proposed here initially has few limiting obstacles, but the invention is directed to a recording material having at least one recording layer on at least one side of the substrate, the recording layer preferably being selected from the list comprising: heat-sensitive recording layer , pressure-sensitive recording layer, inkjet-receiving layer.
  • the proposed method initially provides the formation of the web-like substrate, for example, and in a preferred embodiment on a paper machine, in which at least one upstream Mischbütte a paper pulp of different pulps, optionally groundwood, fillers and water is applied and where to this paper pulp before your Feeding to the paper machine prefers other ingredients such as resin glue for engine sizing and other conventional additives such as pigments, Nuancierfarbstoffe and / or optical brighteners are added.
  • the proposed method further provides for preparing a coating composition for forming a recording layer on at least one side of the substrate, wherein said recording layer is preferably selected from the list comprising: heat-sensitive recording layer, pressure-sensitive recording layer, inkjet-receiving layer.
  • the coating composition to be prepared for this purpose comprises at least one dye precursor and at least one color acceptor, the dye precursor and color acceptor reacting with one another under the action of heat.
  • N- (p-toluenesulphonyl) -N'-3- (p-toluenesulphonyl-oxyphenyl) -urea which is very particularly preferred because of its resistance to organic solvents is also known as Pergafast® 201 from BASF Corporation and can be represented as the following formula ( 1), although in some representations the CH3 groups are also omitted.
  • N- (p-toluenesulphonyl) -N'-3- (p-toluenesulphonyl-oxy-phenyl) urea possibly used as a color acceptor in the coating composition
  • a urea-urethane compound according to the following formula (2):
  • 4,4'-Dihydroxydiphenylsulfon is also often referred to as 4,4'-sulfonyldiphenol and is also known under the trade name 4.4 bisphenol S.
  • 4,4'-Dihydroxydiphenylsulfone has the chemical formula C12H10O4S and can be represented as the following formula (3):
  • the coating composition for forming the thermosensitive recording layer has more than one dye precursor, then preferably each selected from the dye precursors listed in the above paragraph.
  • the coating composition for forming the heat-sensitive recording layer most preferably contains at least one sensitizer selected from the list including stearic acid amide, dimethylsulfone and 2- (2H-benzotriazol-2-yl) -p-cresol for the purpose of enhancing thermal responsiveness , which according to a first preferred embodiment alone, that is, not used in combination with another sensitizer, in particular not with one of the three mentioned sensitizers of the above list. According to a second, almost preferred embodiment, two sensitizers selected from the list comprising stearic acid amide, dimethylsulfone and 2- (2H-benzotriazol-2-yl) -p-cresol may also be used in the coating composition for forming the thermosensitive recording layer involved. Of the three sensitizers mentioned, dimethylsulfone is considered to be very particularly preferred.
  • Suitable binders for incorporation in the coating composition for forming the heat-sensitive recording layer are, for example, water-soluble binders such as starch, hydroxyethylcellulose, methylcellulose, carboxymethylcellulose, gelatin, casein, polyvinyl alcohols, modified polyvinyl alcohols, ethylene-vinyl alcohol copolymers, sodium polyacrylates, acrylamide-acrylate copolymers, acrylamide Acrylate-methacrylate terpolymers and alkali metal salts of styrene-maleic anhydride copolymer or ethylene-maleic anhydride copolymer, which binders can be used alone or in combination with one another; Water-insoluble latex binders such as styrene-butadiene copolymers, acrylonitrile-butadiene copolymers and methyl acrylate-butadiene copolymers are also suitable as binders for incorporation into the heat-sensitive recording layer.
  • water-soluble binders
  • polyvinyl alcohol, ethylene-vinyl alcohol copolymers or polyvinyl alcohol in combination with ethylene-vinyl alcohol copolymers are particularly preferred binders which together in a range from 10 to 20% by weight, based on the total weight of the heat-sensitive recording layer. are incorporated in the heat-sensitive recording layer.
  • the coating composition for forming the thermosensitive recording layer may further contain slip and release agents such as metal salts of higher fatty acids, for example, zinc stearate, calcium stearate and waxes such as paraffin, oxidized paraffin, Polyethylene, polyethylene oxide, stearamides and castor wax.
  • slip and release agents such as metal salts of higher fatty acids, for example, zinc stearate, calcium stearate and waxes such as paraffin, oxidized paraffin, Polyethylene, polyethylene oxide, stearamides and castor wax.
  • pigments preferably inorganic pigments such as, for example, aluminum (hydr) oxide, silica and calcium carbonate, in particular calcium carbonate, which should preferably be incorporated into the recording layer in an amount of from 0 to 45% by weight, very particularly preferably in an amount of from 10 to 40% by weight, based in each case on the total weight of the recording layer, as preferably applies.
  • inorganic pigments such as, for example, aluminum (hydr) oxide, silica and calcium carbonate, in particular calcium carbonate, which should preferably be incorporated into the recording layer in an amount of from 0 to 45% by weight, very particularly preferably in an amount of from 10 to 40% by weight, based in each case on the total weight of the recording layer, as preferably applies.
  • the coating composition for forming a coating layer covering the recording layer over the entire area is most preferably applied by means of a coating unit selected from the list, comprising: roller coater, curtain coater (in the embodiment as slot coater or slip surface coater) and air brush. Subsequently, this applied coating composition is crosslinked depending on the given component entry and / or dried by means of heat.
  • a coating unit selected from the list, comprising: roller coater, curtain coater (in the embodiment as slot coater or slip surface coater) and air brush.
  • the coating units preferably used for the formation of the pigmented intermediate layer are, in particular, leveling coating units selected from the list, comprising: roller coater, doctor blade coater or doctor blade coater. Especially in a method using one of these mentioned coating method, such a pigmented intermediate layer can make a positive contribution to equalize the substrate surface, which reduces the amount of applied mass of a usually expensive coating composition for forming the recording layer.
  • the subsequent drying of the coating composition to form the pigmented intermediate layer is done again and here usually by a method in which heat is supplied, as is done by hot-air floating dryer or contact dryer. Proven is also a combination of the listed dry processes. For the basis weight of the pigmented intermediate layer, a preferred range between 5 and 20 g / m 2 and even better between 7 and 12 g / m 2 has proven.
  • This coating composition for forming the pigmented intermediate layer contains binders and preferably a mixture of organic pigments and inorganic pigments.
  • the inorganic pigments are thereby preferred, individually or in combination with one another, selected from the list, comprising: silicon (di) oxide, bentonite, talc, calcined kaolin, calcium carbonate and aluminum oxide and here in particular boehmite.
  • the above inorganic pigments, individually or in combination with one another, selected from the list above, are quoted as one of the list comprising: calcined kaolin, calcium carbonate and aluminum oxide, and here especially boehmite.
  • the coating composition for forming the pigmented intermediate layer contains at least one binder, preferably based on a synthetic polymer, wherein, for example, styrene-butadiene latex gives particularly good results.
  • a synthetic binder with the admixture of at least one natural polymer, such as particularly preferred starch, represents a particularly suitable embodiment.
  • the surface mass,% by weight (% by weight) and parts by weight (parts by weight) given in the specification and claims refer to the "atro" weight, respectively. absolutely dry parts by weight.
  • the relevant figures are calculated from the "lutro" weight, i. air-dry parts by weight, minus the proportion by weight of water around and inside the pigments in their form of delivery.

Landscapes

  • Heat Sensitive Colour Forming Recording (AREA)

Claims (12)

  1. Matériau d'enregistrement pour impression offset, comportant
    - un substrat en feuille continue, présentant un recto et un verso opposé au recto,
    - au moins une couche d'enregistrement sur au moins une face du substrat,
    - au moins une couche de couchage recouvrant sur toute sa surface la couche d'enregistrement,
    caractérisé en ce que la au moins une couche de couchage recouvrant sur toute sa surface la couche d'enregistrement présente une masse surfacique comprise entre 0,15 et 0,35 g/m2, et la au moins une couche de couchage recouvrant sur toute sa surface la couche d'enregistrement est exempte de pigments.
  2. Matériau d'enregistrement selon la revendication 1, caractérisé en ce que la au moins une couche de couchage recouvrant sur toute sa surface la couche d'enregistrement contient au moins un liant, choisi dans la liste comprenant :
    - un copolymère éthylène-alcool vinylique (EVOH),
    - un poly(alcool vinylique) modifié par des groupes carboxyle, un silanol ou une diacétone,
    - un poly(alcool vinylique) non modifié,
    seuls ou en mélange les uns avec les autres.
  3. Matériau d'enregistrement selon l'une des revendications 1 et 2, caractérisé en ce que la au moins une couche de couchage recouvrant sur toute sa surface la couche d'enregistrement contient au moins un auxiliaire de réticulation, choisi dans la liste comprenant l'acide borique, une polyamine, une résine époxy, un dialdéhyde, des oligomères du formaldéhyde, une résine d'épichlorhydrine, le dihydrazide de l'acide adipique, la diméthylurée, le mélamine formaldéhyde, seuls ou en mélange les uns avec les autres.
  4. Matériau d'enregistrement selon l'une des revendications 1 et 2, caractérisé en ce que la au moins une couche d'enregistrement sur au moins une face du substrat est une couche d'enregistrement choisie dans la liste comprenant une couche d'enregistrement sensible à la chaleur, une couche d'enregistrement sensible à la pression, une couche réceptrice d'encre pour jet d'encre.
  5. Procédé de fabrication d'un matériau d'enregistrement pour impression offset, le procédé comprenant au moins les étapes suivantes :
    - constitution d'un substrat en feuille continue, présentant un recto et un verso opposé au recto,
    - application d'une composition de revêtement préparée au préalable, pour former une couche d'enregistrement sur au moins une face du substrat,
    - séchage de la composition de revêtement pour former une couche d'enregistrement,
    - application d'une composition de revêtement préparée au préalable pour former une couche de couchage recouvrant sur toute sa surface la couche d'enregistrement,
    - séchage et/ou réticulation de la couche de couchage recouvrant sur toute sa surface la couche d'enregistrement,
    caractérisé en ce que
    la au moins une couche de couchage recouvrant sur toute sa surface la couche d'enregistrement présente une masse surfacique comprise entre 0,15 et 0,35 g/m2, et
    la au moins une couche de couchage recouvrant sur toute sa surface la couche d'enregistrement est exempte de pigments.
  6. Procédé de fabrication d'un matériau d'enregistrement selon la revendication 5, caractérisé en ce que le procédé comprend les au moins deux étapes supplémentaires suivantes :
    - application d'une composition de revêtement préparée au préalable, pour former une couche intermédiaire pigmentée disposée entre le substrat et la couche d'enregistrement,
    - séchage de la couche intermédiaire pigmentée,
    ces au moins deux étapes supplémentaires devant être insérées avant l'étape "application d'une composition de revêtement préparée au préalable, pour former une couche d'enregistrement sur au moins une face du substrat".
  7. Procédé de fabrication d'un matériau d'enregistrement selon l'une des revendications 5 et 6, caractérisé en ce que la au moins une couche d'enregistrement sur au moins une face du substrat est une couche d'enregistrement choisie dans la liste comprenant :
    - une couche d'enregistrement sensible à la chaleur,
    - une couche d'enregistrement sensible à la pression,
    - une couche réceptrice d'encre pour jet d'encre.
  8. Procédé de fabrication d'un matériau d'enregistrement selon l'une des revendications 5 à 7, caractérisé en ce que la composition de revêtement pour former la couche d'enregistrement est appliquée à l'aide d'une coucheuse choisie dans la liste comprenant une coucheuse à racle tournante, une coucheuse à racles, une coucheuse à rideau et un aérographe.
  9. Procédé de fabrication d'un matériau d'enregistrement selon l'une des revendications 5 à 8, caractérisé en ce que la composition de revêtement pour former une couche de couchage recouvrant sur toute sa surface la couche d'enregistrement est appliquée à l'aide d'une coucheuse choisie dans la liste comprenant une coucheuse à rouleau, une coucheuse à rideau et un aérographe.
  10. Procédé de fabrication d'un matériau d'enregistrement selon l'une des revendications 5 à 9, caractérisé en ce que
    (a) l'application d'une composition de revêtement préparée au préalable a lieu sur au moins une face du substrat, et
    (b) l'application d'une composition de revêtement préparée au préalable pour former une couche de couchage recouvrant sur toute sa surface la couche d'enregistrement a lieu exactement dans le cadre d'une passe de la machine.
  11. Procédé de fabrication d'un matériau d'enregistrement sensible à la chaleur selon l'une des revendications 5 à 10, caractérisé en ce que le substrat en feuille continue est un papier.
  12. Utilisation d'un matériau d'enregistrement selon l'une des revendications 1 à 4 pour une impression offset.
EP12745873.5A 2011-09-23 2012-08-12 Matériau d'enregistrement destiné à une impression offset Active EP2758249B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE201110114129 DE102011114129A1 (de) 2011-09-23 2011-09-23 Aufzeichnungsmaterial zur Offset-Bedruckung
PCT/EP2012/065775 WO2013041302A1 (fr) 2011-09-23 2012-08-12 Matériau d'enregistrement destiné à une impression offset

Publications (2)

Publication Number Publication Date
EP2758249A1 EP2758249A1 (fr) 2014-07-30
EP2758249B1 true EP2758249B1 (fr) 2016-04-13

Family

ID=46642556

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12745873.5A Active EP2758249B1 (fr) 2011-09-23 2012-08-12 Matériau d'enregistrement destiné à une impression offset

Country Status (3)

Country Link
EP (1) EP2758249B1 (fr)
DE (1) DE102011114129A1 (fr)
WO (1) WO2013041302A1 (fr)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000318319A (ja) * 1998-12-02 2000-11-21 Mitsubishi Paper Mills Ltd 情報記録材料
DE10051294C1 (de) 2000-10-16 2002-04-18 Mitsubishi Hitec Paper Flensbu Wärmeempfindlicher Aufzeichnungsbogen und seine Verwendung
DE10341168A1 (de) 2003-09-06 2005-04-07 Mitsubishi Hitec Paper Flensburg Gmbh Wärmeempfindliches Aufzeichnungsmaterial und seine Verwendung
DE502007002945D1 (de) * 2007-09-10 2010-04-08 Mitsubishi Hitec Paper Flensbu Wärmeempfindliches Aufzeichnungsmaterial

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Publication number Publication date
DE102011114129A1 (de) 2013-03-28
EP2758249A1 (fr) 2014-07-30
WO2013041302A1 (fr) 2013-03-28

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