EP2861429B1 - Couche de réception pour procédés d'impression numériques comprenant de la cellulose nanofibrillée - Google Patents

Couche de réception pour procédés d'impression numériques comprenant de la cellulose nanofibrillée Download PDF

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Publication number
EP2861429B1
EP2861429B1 EP13730200.6A EP13730200A EP2861429B1 EP 2861429 B1 EP2861429 B1 EP 2861429B1 EP 13730200 A EP13730200 A EP 13730200A EP 2861429 B1 EP2861429 B1 EP 2861429B1
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EP
European Patent Office
Prior art keywords
receiving layer
layer
weight
pigment
ink
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.)
Not-in-force
Application number
EP13730200.6A
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German (de)
English (en)
Other versions
EP2861429A1 (fr
Inventor
Wolfgang Schmidt
Gerd Papier
Michael SCHLENSTEDT
Ralf Gericke
Andreas FEHLKER
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.)
Schoeller Technocell GmbH and Co KG
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Schoeller Technocell GmbH and Co KG
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Publication of EP2861429A1 publication Critical patent/EP2861429A1/fr
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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
    • B41M5/52—Macromolecular coatings
    • B41M5/5236—Macromolecular coatings characterised by the use of natural gums, of proteins, e.g. gelatins, or of macromolecular carbohydrates, e.g. cellulose
    • 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
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
    • D21H11/16—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only modified by a particular after-treatment
    • D21H11/18—Highly hydrated, swollen or fibrillatable fibres
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H19/00—Coated paper; Coating material
    • D21H19/10—Coatings without pigments
    • D21H19/14—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12
    • D21H19/34—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12 comprising cellulose or derivatives thereof
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H19/00—Coated paper; Coating material
    • D21H19/36—Coatings with pigments
    • D21H19/44—Coatings with pigments characterised by the other ingredients, e.g. the binder or dispersing agent
    • D21H19/52—Cellulose; Derivatives thereof
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
    • D21H21/50—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by form
    • D21H21/52—Additives of definite length or shape
    • 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
    • B41M5/506—Intermediate 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
    • B41M5/5218—Macromolecular coatings characterised by inorganic additives, e.g. pigments, clays

Definitions

  • the invention relates to a recording material for digital printing processes comprising a support and a color receiving layer disposed on the support.
  • the work that led to the invention was supported by the Seventh Framework Program of the European Union [FP7 / 2007-2013] under grant agreement n ° 22802.
  • the digital printing processes include, among others, the ink-jet printing process. This printing process is also used for high-quality printing of photos.
  • the applied inks must dry quickly, which requires a high absorbency for the ink fluid.
  • the ink dyes should be fixed by the dye-receiving layer, that is, they should be held so that they can no longer migrate or dissolve from the dye-receiving layer even under the influence of moisture.
  • a high color density is desired.
  • the paper must have a high light resistance, ie a high resistance to discoloration under the action of light.
  • the dimensional stability of the image carrier should be high and the material good flow properties in the printer. Finally, a smooth and possibly shiny surface is desired.
  • Another quality feature is that crack formation in the image layer is avoided as far as possible.
  • the cracking depends strongly on the drying course after the application of the receiving layer, after printing with ink liquid or rewetting the dye-receiving layer on the support.
  • an increase in layer thickness appears to correlate with increased cracking.
  • a large layer thickness of the dye-receiving layer especially over 20 microns, is desirable for complete absorption of the ink liquid in ink-jet printing.
  • US 6,372,329 B1 an ink-jet recording material for dyeing and pigmented ink imaging in which a first and a second ink-receiving layer are coated on a substrate, and wherein the second ink-receiving layer contains a mixture of maleic acid or itaconic acid-modified polyvinyl alcohol and a plasticizer.
  • the second layer is applied to the first layer.
  • Plasticizers are phosphates, substituted phthalic anhydrides, glycerols and glycols.
  • the pH of the second coating composition should preferably not be greater than 4.0.
  • the US 2002/0064633 A1 describes a receiver for the ink-jet printing process for aqueous, oily and solid inks.
  • the receiving layer contains a polymer and a crosslinking agent.
  • the polymer comprises a quaternary ammonium in the molecule.
  • a certain ratio of organic content to inorganic content is required in this polymer.
  • the WO 2011/001706 A1 describes a receiving layer for the ink-jet printing process.
  • the receiving layer should be arranged directly on the paper as a carrier of the receiving layer and contain cellulose nanofibers.
  • the carboxyl groups of the cellulose nanofibers are said to form a bond to the cellulose of the paper, thus improving the adhesion of the receiving layer to the paper surface.
  • the WO 2012/043103 A1 describes a paper coating composition containing nanofibrillated cellulose which is said to enhance the paper's oxygen barrier properties and gloss. This coating solution should also be applied directly to the paper.
  • the EP 0 806 299 A2 describes a recording material for the ink-jet printing process, which may still contain a polyolefin layer between paper as a support and the receiving layer to provide a feel like a silver salt photographic paper.
  • the object of the invention is to provide a further recording material for digital imaging processes, in particular for the ink-jet printing process, which, in addition to the usual requirements such as high color density, dimensional stability and photo-like feel, has a particular resistance to crack formation in the receiving layer.
  • a recording material for digital printing processes comprising a support and at least one dye-receiving layer with a binder, wherein the dye-receiving layer contains a nanofibrillated cellulose (NFC) and at least one side of the support is provided with a polyolefin layer and the polyolefin layer the image side is arranged between the carrier and dye-receiving layer.
  • NFC nanofibrillated cellulose
  • Nanofibrillated celluloses according to the invention include celluloses called microfibrillated cellulose (MFC), nanocrystalline cellulose and bacterial nanocellulose (BNC).
  • MFC microfibrillated cellulose
  • BNC bacterial nanocellulose
  • the fibers of such nanofibrillated celluloses have a diameter in the nanometer range (nm).
  • the length of the fibers can be up to a few micrometers ( ⁇ m).
  • nanofibrillated celluloses in the dye-receiving layer makes it possible to increase the coating speed with the same layer thickness of the print-receiving layer in comparison to conventional compositions of receiving layers for digital printing processes.
  • the recording materials according to the invention show even better properties in the so-called cutting dust examination and an improved water resistance of the print.
  • the nanofibrillated celluloses used according to the invention can be obtained by known pulping processes, for example with a mixture of sodium hydroxide and sodium sulphide (kraft pulp) or salts of sulphurous acid (sulphite pulp), subsequent delamination of the pulp by chemical treatment, such as introduction of charged groups into the pulp fibers and a following homogenizing treatment of the pulp.
  • pulping processes for example with a mixture of sodium hydroxide and sodium sulphide (kraft pulp) or salts of sulphurous acid (sulphite pulp), subsequent delamination of the pulp by chemical treatment, such as introduction of charged groups into the pulp fibers and a following homogenizing treatment of the pulp.
  • the wood pulp obtained after pulping may be oxidatively decomposed by treatment with 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO) and then mechanically homogenized.
  • TEMPO 2,2,6,6-tetramethylpiperidine-1-oxyl
  • This oxidative treatment facilitates defibrillation of the cellulose-containing material during subsequent mechanical homogenization.
  • the mechanical homogenization ultimately gives the nanofibrillated cellulose.
  • the defibrillation can be done by different methods.
  • microfluidizers so-called microfluidizers, high-performance grinders, combinations of beating, rubbing and homogenizing, high-shear refiner and cryo-shredder were described.
  • delamination with ball mills and ultrasonic treatment nanocelluloses can be produced.
  • Nanofibrillated celluloses are commercially available.
  • the fiber diameter of the fibers used according to the invention can be 3 to 100 nm, in particular 5 to 60 nm or 10 to 30 nm.
  • the fiber length of the fibers used according to the invention may be 100 nm or 200 nm to 800 nm, 1 ⁇ m or a few ⁇ m. The fiber length may vary depending on the pulp used and the manufacturing process used.
  • the nanofibrillated cellulose in the receiving layer coating composition is in a concentration of 0.01 to 1%, more preferably 0.02 to 0.5%, and most preferably 0.04 to 0.08% by weight. %, based on the dry weight of the coating composition used.
  • the nanofibrillated cellulose is used fresh. Fresh means within a period of two weeks after the preparation of the nanofibrillated cellulose.
  • the receiving layer preferably contains a water-soluble and / or water-dispersible binder.
  • Suitable binders are, for example, polyvinyl alcohol, fully or partially saponified, cationically modified polyvinyl alcohol, polyvinyl alcohol containing silyl groups, polyvinyl alcohol containing acetal groups, gelatin, polyvinylpyrrolidone, starch, carboxymethylcellulose, polyethylene glycol, styrene / butadiene latex, acrylate copolymers such as styrene / acrylate latex, vinylacetate homo and copolymers and ethylene-vinyl acetate copolymers. Particularly preferred are fully or partly saponified polyvinyl alcohols.
  • the amount of binder may be from 60 to 5% by weight, preferably from 50 to 10% by weight, but in particular from 35 to 8% by weight, based on the weight of the dried layer.
  • the receiving layer (image recording layer) of the present invention may further contain one or more pigments and at least one binder. Since the resin layer has a barrier action to the ink when using resin base substrates, and the base paper can not absorb the ink liquid, the recording layer (s) thereon must have a high absorption capacity, which can be achieved, for example, by using highly absorptive inorganic particles. Such microporous layers provide high ink receptivity.
  • suitable pigments are aluminum oxide, aluminum hydroxide, aluminum oxide hydroxide, aluminum oxide hydrate, silicas, magnesium hydroxide, kaolin, titanium dioxide, zinc oxide, zinc hydroxide, calcium silicate, magnesium silicate, calcium carbonate, magnesium carbonate and barium sulfate.
  • the amount of the pigment in the receiving layer may be 40 to 95% by weight, preferably 60 to 90% by weight, based on the weight of the dried layer.
  • the particle size distribution of the pigment of the receiving layer may preferably be less than 1000 nm, but in particular 50 to 150 nm.
  • the mean particle size of the primary particles is preferably less than 100 nm, in particular less than 50 nm. Such particle sizes of the pigment are suitable for glossy surfaces. If the image is to be matt, pigments with a particle size of 1 .mu.m to 10 .mu.m can be used in the receiving layer
  • the receiving layer may contain conventional additives and auxiliaries such as crosslinking agents, ionic and / or nonionic surfactants, dye fixing agents such as polyammonium compounds, UV absorbers, antioxidants and other light stability and gas resistance improving agents, as well as other auxiliaries.
  • the application weight of the ink receiving layer may be 5 to 60 g / m 2 , preferably 10 to 50 g / m 2 , particularly preferably 20 to 40 g / m 2 .
  • the receiving layer may be single-layered or multi-layered.
  • the receiving layer can be constructed from an ink-absorbing lower layer and a dye-fixing upper layer.
  • pigments of the ink-absorbing lower layer which are suitable according to the invention are, for example, aluminum oxide, aluminum hydroxide, aluminum oxide hydroxide, aluminum oxide hydrate, silica, silica, barium sulfate and titanium dioxide.
  • a pigment based on alumina and / or alumina hydroxide is particularly preferred.
  • Such a pigment may be cationically modified.
  • the concentration of the pigment in the ink-absorbing layer is 40 to 95% by weight, preferably about 60 to 90% by weight, based on the weight of the dried layer.
  • the grain size distribution of the pigment of the ink absorbing layer may preferably be in the range of 70 to 1000 nm, preferably 80 to 200 nm, particularly preferably 90 to 150 nm.
  • the average particle size of the pigment of the ink absorbing layer may be 50 to 350 nm, preferably 80 to 120 nm.
  • Suitable pigments of the dye-fixing layer according to the invention are, for example, aluminum oxide, aluminum hydroxide, aluminum oxide hydrate, silicon dioxide, barium sulfate and titanium dioxide.
  • the concentration of the pigment in the dye-fixing layer may be 70 to 95% by weight, preferably 80 to 90% by weight.
  • the grain size distribution of the pigment of the dye-fixing layer may preferably be in the range of 50 to 200 nm, preferably 70 to 120 nm.
  • the average particle size of the pigment of the dye-fixing layer may preferably be 70 to 120 nm, in particular about 100 nm.
  • the pigments may have a particle size of 1 .mu.m to 10 .mu.m.
  • the ink-absorbing and dye-fixing layers contain a water-soluble and / or water-dispersible polymeric binder.
  • Suitable binders are, for example, polyvinyl alcohol, fully or partially saponified, cationically modified polyvinyl alcohol, polyvinyl alcohol containing silyl groups, polyvinyl alcohol containing acetal groups, polyvinyl alcohol containing acetate groups, gelatin, polyvinylpyrrolidone, starch, carboxymethylcellulose, polyethylene glycol, styrene / butadiene latex and styrene / acrylate latex.
  • the amount of the binder in the dye-fixing and ink-absorbing layers is 5 to 45% by weight, preferably 10 to 35% by weight, based on the weight of the dried layer.
  • Both layers may contain conventional additives and auxiliaries such as surfactants, crosslinking agents and dye fixing agents.
  • the coating weights of the ink-absorbing and the dye-fixing layer may each be 10 to 60 g / m 2 , preferably 15 to 30 g / m 2 .
  • the receiving layer can be applied to the support, for example by a doctor blade method, blade method, film press, air brush, the so-called slot die method or a curtain coating method.
  • further layers such as protective layers or layers improving the gloss can be applied to the receiving layer.
  • the application weight is preferably less than 1 g / m 2 .
  • a base paper As a support of the recording material of the invention, a base paper, a resin-coated paper or a plastic film may be used, wherein according to the invention at least one side of the support is provided with a polyolefin layer as defined in claim 1.
  • the term base paper is understood to mean an uncoated or surface-sized paper.
  • a base paper may include pulp fibers, sizing agents such as alkylknene dimers, fatty acids and / or fatty acid salts, epoxidized fatty acid amides, alkenyl or alkyl succinic anhydride, starch, tree resins, wet strength agents such as polyamine-polyamide-epichlorohydrin, dry strength agents such as anionic, cationic or amphoteric polyamides, optical brighteners, pigments, Dyes, defoamers and other known in the paper industry may contain auxiliaries.
  • the base paper can be surface-sized. Examples of suitable sizing agents are polyvinyl alcohol or oxidized starch.
  • the base paper can be produced on a Fourdrinier or a Yankee paper machine (cylinder paper machine).
  • the basis weight of the base paper can be 50 to 250 g / m 2 , in particular 80 to 180 g / m 2 , amount.
  • the raw paper can be used in uncompacted or compacted form (smoothed).
  • Particularly suitable are base papers having a density of 0.8 to 1.05 g / cm 3 , in particular 0.95 to 1.02 g / cm 3 .
  • the pulp for papermaking is preferably a eucalyptus pulp with a pulp content of less than 200 microns after grinding of 10 to 35 wt .-% and an average fiber length of 0.5 to 0.75 mm. It has been found that the use of a pulp with a limited proportion of fibers smaller than 200 microns reduces the loss of stiffness occurring when using filler.
  • Hardwood pulps NBHK - Northern Bleached Hardwood Kraft Pulp
  • softwood pulps may also be used.
  • kaolins calcium carbonate in its natural form such as limestone, marble or dolomite stone, precipitated calcium carbonate, calcium sulfate, barium sulfate, titanium dioxide, talc, silica, alumina and mixtures thereof can be used in the base paper.
  • Particularly suitable is calcium carbonate with a particle size distribution in which at least 60% of the particles are smaller than 2 microns and at most 40% are smaller than 1 micron.
  • calcite is used with a particle size distribution in which about 25% of the particles have a particle size of less than 1 micron and about 85% of the particles have a particle size of less than 2 microns.
  • a calcium carbonate with a particle size distribution can be used in which at least 70%, preferably at least 80%, the particles are smaller than 2 microns and at most 70% of the particles are smaller than 1 micron.
  • the support may be a polyolefin coated paper.
  • a polyolefin coated paper contains a polyolefin layer disposed on at least one side of the base paper.
  • the polyolefin layer may preferably contain a thermoplastic polymer. Particularly suitable for this purpose are low density polyethylene (LDPE), high density polyethylene (HDPE), ethylene / ⁇ -olefin copolymers (LLDPE), polypropylene, polyisobutylene, polymethylpentene and mixtures thereof.
  • LDPE low density polyethylene
  • HDPE high density polyethylene
  • LLDPE ethylene / ⁇ -olefin copolymers
  • polypropylene polyisobutylene
  • polymethylpentene polymethylpentene and mixtures thereof.
  • the polyolefin layer may contain white pigments such as titanium dioxide and calcium carbonate, as well as other auxiliaries such as optical brighteners, dyes and dispersing agents.
  • the application weight of the polyolefin layer on the front side can be 5 to 50 g / m 2 , in particular 10 to 30 g / m 2 or according to a further preferred embodiment 10 to 20 g / m 2 .
  • the polyolefin layer can be extruded in one layer or coextruded in multiple layers. The extrusion coating can be carried out at machine speeds up to 600 m / min.
  • the back of the base paper can be coated with a clear, ie pigment-free synthetic resin, in particular polyethylene.
  • the coating weight of the synthetic resin layer on the back can be 5 to 50 g / m 2 , in particular 10 to 40 g / m 2 or according to a further preferred embodiment 10 to 20 g / m 2 .
  • the synthetic resin layer on the back of the base paper can also be pigmented.
  • the back side of the support may also have further functional layers such as antistatic or anticurl layers.
  • a layer containing a hydrophilic binder can be arranged between base paper and synthetic resin layer.
  • Particularly suitable for this purpose are film-forming starches.
  • Hydrophilic binders are, for example, hydroxypropylated starch and / or thermally modified starches.
  • This layer may preferably contain other polymers such as polyamide copolymers and / or polyvinylamine copolymers.
  • the base paper can also have a size press application with a binder, the amount applied being 0.3 to 5 g / m 2 .
  • Suitable binders are conventional surface sizing agents and polyacrylates. This order may contain pigments.
  • a layer may be applied with pigment.
  • the layer containing the hydrophilic binder may be disposed directly on the front side of the base paper or on the back side of the base paper. It can be applied as a single layer or as a multilayer to the base paper.
  • the coating composition can be applied in-line or off-line with all customary in papermaking application units, the amount is chosen so that after drying the coating weight per layer at most 20 g / m 2 , in particular 8 to 17 g / m 2 , or according to a particularly preferred embodiment is 2 to 6 g / m 2 .
  • the layer may preferably contain a pigment.
  • the pigment can be selected from a group of metal oxides, silicates, carbonates, sulfides and sulfates. Particularly suitable are pigments such as kaolins, talc, calcium carbonate and / or barium sulfate. Particularly preferred is a pigment having a narrow particle size distribution, wherein at least 70% of the pigment particles have a size of less than 1 micron.
  • the proportion of the pigment with the narrow particle size distribution of the total amount of pigment should be at least 5% by weight, in particular from 10 to 90% by weight. Particularly good results can be achieved with a proportion of 30 to 80 wt .-% of the total pigment.
  • a pigment having a narrow particle size distribution is also understood to mean pigments having a particle size distribution in which at least 70% by weight of the pigment particles have a size of less than 1 ⁇ m and 40 to 80% by weight of these pigment particles the difference between the pigment having the largest grain size (diameter) and the pigment of the smallest grain size is smaller than about 0.4 ⁇ m.
  • Particularly advantageous proved to be a calcium carbonate with a d 50% value of about 0.7 microns.
  • a pigment mixture which consists of the above-mentioned calcium carbonate and kaolin.
  • the quantitative ratio calcium carbonate / kaolin is preferably 30:70 to 70:30. It was surprisingly found that, despite the high proportion of yellowing prone kaolin, only an insignificant negative effect on the whiteness of the coated material was observed.
  • the amount ratio of binder / pigment in the layer can be from 0.1 to 2.5, preferably from 0.2 to 1.5, but in particular from 0.9 to 1.3.
  • the solids content of the coating composition of the invention may be from 15 to 35% by weight, based on the weight of the coating composition.
  • a plastic film can be used as the carrier.
  • Suitable plastic films are, for example, those of polyolefin (s), polycarbonates, acrylic resin (s), polyvinyl chloride and polyethylene terephthalate.
  • One side of the carrier is provided with a polyolefin layer as defined in claim 1.
  • the dye-receiving layer may contain an electrically conductive component. Suitable electrically conductive components are, for example, an electrically conductive polymer or finely divided electrically conductive pigments.
  • the amount of the electroconductive component in the dye-receiving layer may be 0 to 50% by weight, especially 0.1 to 4.0% by weight, based on the mass of the dried layer.
  • TEMPO nanofibrillated cellulose
  • a tank with a capacity of 500 L was filled with the following materials: 50 kg Pulp suspension (solids content 3.5%) 10 G TEMPO (2,2,6,6-tetramethylpiperidine-1-oxyl) 1, 65 kg NaBr 21 L NaOCl (150 g / l).
  • the pulp was first disintegrated in water for 15 minutes. TEMPO and sodium bromide were added from a preformed mixture and then the sodium hypochlorite was added and the mixture was left in the tank at pH 10 for two hours. The pH was adjusted with 1 M NaOH. The reaction was stopped by adding ethanol that reacts with the remaining sodium hypobromite. After the reaction, the functionalized pulp was washed four times and centrifuged.
  • the TEMPO fibers were used to make nanofibrillated cellulose.
  • the material to be homogenized was treated at a consistency of 4% in a GEA Ariete homogenizer in two passes at 150 MPa (1500 bar).
  • a eucalyptus pulp was used.
  • the pulp was ground as an approximately 5% aqueous suspension (thick matter) with the aid of a refiner to a freeness of 36 ° SR.
  • the mean fiber length was 0.64 mm.
  • the concentration of pulp fibers in the thin was 1 wt .-%, based on the mass of the pulp suspension.
  • the thin stock additives were added as a neutral sizing agent alkylketene dimer (AKD) in an amount of 0.48 wt .-%, wet strength agents polyamine-polyamide-epichlorohydrin resin (Kymene ®) in an amount of 0.36 wt .-% and a natural CaCO 3 in an amount of 10 wt .-%.
  • the quantities are based on the pulp mass.
  • the thinstock whose pH was adjusted to about 7.5, was transferred from the head box to the wire of the paper machine, followed by sheet formation by dewatering the web in the wire section of the paper machine.
  • the further dewatering of the paper web to a water content of 60 wt .-%, based on the web weight. Further drying took place in the dryer section of the paper machine with heated drying cylinders.
  • the result was a base paper with a basis weight of 160 g / m 2 and a humidity of about 7%.
  • the base paper is coated on both sides with a coating of a styrene-acrylate binder, starch and a pigment mixture of calcium carbonate and kaolin with a coating weight of 15 g / m 2 on both sides, dried and then smoothed with a calender.
  • the thickness of the layer was 17 ⁇ m.
  • the face of the base paper was coated with a polyolefin blend of 71% by weight of a low density polyethylene (LDPE, 0.923 g / cm 3 ), 16% by weight of a TiO 2 masterbatch (50% by weight LDPE and 50% by weight). % TiO 2 ) and 13 wt .-% of other additives such as optical brightener, calcium stearate and blue pigment coated with a coating weight of about 17 g / m 2 in the laminator at a speed of about 250 m / min. The thickness of the front polyolefin layer was 17 ⁇ m. Subsequently, a receiving layer for the ink-jet printing process was applied to the front-side polyolefin layer.
  • LDPE low density polyethylene
  • TiO 2 masterbatch 50% by weight
  • % TiO 2 % TiO 2
  • 13 wt .-% of other additives such as optical brightener, calcium stearate and blue pigment coated with a coating weight
  • the dilutions of nanofibrillated cellulose were used in the pilot coater test planned formulations under standard conditions for aluminum oxide based coating formulations.
  • the potential for increasing the speed when using nanofibrillated cellulose should be determined. Quality criterion here was the Crackinglomiterion. The process settings were therefore chosen so that even with the standard formulation, a certain amount of cracking occurs, in order to be able to compare the formulations with nanofibrillated cellulose better against the standard. Subsequently, the weight of the Formulations with nanofibrillated cellulose with a constant drying profile are gradually increased and the cracking level is tested in comparison to the standard. The potential to increase the speed with a constant drying profile can be estimated by the possible increase in the bar weight.
  • the formulations with nanofibrillated cellulose showed no abnormalities during the test run during the application to the carrier by means of curtain coating. There were no differences between the individual formulations with regard to curtain stability or running behavior in the casting process.
  • the counting method becomes very uncertain, because in some cases not the number of cracks but the size increases massively and thus also a smaller number of cracks can produce a completely cracked pattern. For this reason, the visual assessment of the sample quality was included in the evaluation.
  • Cutting dust - The nanocellulose patterns show an improvement over the standard in terms of the formation of cutting dust. Overall, however, all patterns are at a very low and good level, as the following table shows.

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Molecular Biology (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Ink Jet Recording Methods And Recording Media Thereof (AREA)
  • Paper (AREA)
  • Ink Jet (AREA)
  • Laminated Bodies (AREA)

Claims (5)

  1. Matériau de réception d'impression pour procédé d'impression au jet d'encre, qui comprend un support et au moins une couche réceptrice de couleurs avec un liant, ladite couche réceptrice de couleurs contenant de la cellulose nanofibrillée, sachant qu'au moins une face du support est pourvue d'une couche de polyoléfine et que ladite couche de polyoléfine est disposée sur le côté image, entre le support et la couche réceptrice de couleurs.
  2. Matériau de réception d'impression selon la revendication 1,
    caractérisé en ce que la part de cellulose nanofibrillée contenue dans la couche réceptrice de couleurs est de 0,02 à 0,1 % en poids par rapport au poids à l'état sec de ladite couche.
  3. Matériau de réception d'impression selon revendication 1 ou 2,
    caractérisé en ce que la couche réceptrice de couleurs contient un liant soluble à l'eau et / ou se dispersant dans l'eau.
  4. Matériau de réception d'impression selon revendication 1 ou 2,
    caractérisé en ce que la couche réceptrice de couleurs contient un alcool polyvinylique.
  5. Matériau de réception d'impression selon l'une des revendications 1 à 3,
    caractérisé en ce que la couche réceptrice de couleurs contient un pigment anorganique, à particules fines.
EP13730200.6A 2012-06-15 2013-06-14 Couche de réception pour procédés d'impression numériques comprenant de la cellulose nanofibrillée Not-in-force EP2861429B1 (fr)

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PCT/EP2013/062392 WO2013186367A1 (fr) 2012-06-15 2013-06-14 Couche de réception pour procédés d'impression numériques comprenant de la cellulose nanofibrillée

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EP2861429B1 true EP2861429B1 (fr) 2016-06-08

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CA2941100C (fr) 2014-03-14 2022-07-19 Stora Enso Oyj Procede de fabrication de materiau d'emballage, et materiau d'emballage fabrique par le procede
CN106457865B (zh) * 2014-05-09 2019-04-12 Fp创新研究中心 用于印刷的纤维素纳米晶体涂层介质
CN106573487B (zh) * 2014-07-31 2019-11-22 惠普发展公司，有限责任合伙企业 印刷基底
EP3353347B1 (fr) * 2015-09-23 2021-05-05 Stora Enso Oyj Papier d'impression sans encre
ES2857512T3 (es) 2016-04-05 2021-09-29 Fiberlean Tech Ltd Productos de papel y cartón
US11846072B2 (en) 2016-04-05 2023-12-19 Fiberlean Technologies Limited Process of making paper and paperboard products
WO2018052400A1 (fr) 2016-09-13 2018-03-22 Hewlett-Packard Development Company, L.P. Compositions de réception d'image
CN110431022A (zh) * 2017-03-13 2019-11-08 富士胶片株式会社 转印薄膜及图像形成方法
JP7139202B2 (ja) * 2018-09-11 2022-09-20 大王製紙株式会社 加飾フィルム及びその製造方法
CN109706792B (zh) * 2019-01-04 2021-05-14 衢州五洲特种纸业股份有限公司 一种透明防粘纸及其制备方法
JP6645604B1 (ja) * 2019-03-27 2020-02-14 王子ホールディングス株式会社 シートおよびシートの製造方法
CN115125767A (zh) * 2022-07-25 2022-09-30 广东伽立实业投资有限公司 一种表面涂布纳米纤维素的热升华转印纸及其制备方法

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JPH07156536A (ja) * 1993-12-07 1995-06-20 Dainippon Printing Co Ltd 受像シート及びその記録方法
DE19618607C2 (de) * 1996-05-09 1999-07-08 Schoeller Felix Jun Foto Aufzeichnungsmaterial für Tintenstrahl-Druckverfahren
DE10009247C1 (de) * 2000-02-28 2001-10-18 Schoeller Felix Jun Foto Schichtträger
WO2001070510A1 (fr) * 2000-03-17 2001-09-27 Hitachi Maxell, Ltd. Support d'enregistrement à jet d'encre et procédé de production
US20030152720A1 (en) * 2002-02-08 2003-08-14 Michael Lubar Ink jet recording sheet, method for the preparation of same, and ink jet recording method using same
US7829160B2 (en) * 2006-02-28 2010-11-09 Eastman Kodak Company Glossy inkjet recording element on absorbent paper
CN100393533C (zh) * 2006-06-20 2008-06-11 南开大学 防水喷墨打印介质及其制备方法
US20080311384A1 (en) * 2007-06-15 2008-12-18 Christopher Arend Toles Coating composition
WO2011001706A1 (fr) * 2009-06-29 2011-01-06 日本製紙株式会社 Papier pour enregistrement d'informations et papier traité
JP2013256546A (ja) * 2010-09-28 2013-12-26 Nippon Paper Industries Co Ltd セルロースナノファイバー

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JP2015527217A (ja) 2015-09-17
WO2013186367A1 (fr) 2013-12-19
CN104379358A (zh) 2015-02-25
EP2861429A1 (fr) 2015-04-22
US20150140237A1 (en) 2015-05-21

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