EP1120280A2 - Verfahren zum Vergrössern der Punktegrösse auf einer porösen mit pigmentierten Tinten bedruckten Unterlage - Google Patents

Verfahren zum Vergrössern der Punktegrösse auf einer porösen mit pigmentierten Tinten bedruckten Unterlage Download PDF

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Publication number
EP1120280A2
EP1120280A2 EP01300347A EP01300347A EP1120280A2 EP 1120280 A2 EP1120280 A2 EP 1120280A2 EP 01300347 A EP01300347 A EP 01300347A EP 01300347 A EP01300347 A EP 01300347A EP 1120280 A2 EP1120280 A2 EP 1120280A2
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EP
European Patent Office
Prior art keywords
base coat
rewet
applying
pigment
coat
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.)
Granted
Application number
EP01300347A
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English (en)
French (fr)
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EP1120280B1 (de
EP1120280A3 (de
Inventor
Yi-Hua Tsao
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.)
HP Inc
Original Assignee
Hewlett Packard Co
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Filing date
Publication date
Priority claimed from US09/491,642 external-priority patent/US6475612B1/en
Application filed by Hewlett Packard Co filed Critical Hewlett Packard Co
Publication of EP1120280A2 publication Critical patent/EP1120280A2/de
Publication of EP1120280A3 publication Critical patent/EP1120280A3/de
Application granted granted Critical
Publication of EP1120280B1 publication Critical patent/EP1120280B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • 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
    • B41M5/5236—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

Definitions

  • the present invention is directed generally to ink jet printing, and, more particularly, to printing on porous print media with pigment-based ink jet inks.
  • Ink-jet receiving layers need to absorb the ink vehicle delivered during the printing process.
  • the substrate provides no absorption capacity and as a result, the ink-receiving layer must be the sole absorbing material.
  • an absorbent precoat has been described in the prior art that serves to increase the capacity of the coating, much as a substrate functions in paper-based ink-jet media.
  • a top coat is applied to control surface properties such as gloss, tackiness, surface energy, and durability, as well as to function in concert with the adsorbent precoat.
  • the top coat must be free of defects that would contribute to perceived irregularities or non-uniformities in the coating.
  • U.S. Patent 5,275,867 describes a two-layer coating and a coating process where a top coat is laminated on the precoat.
  • U.S. Patent 5,605,750 describes a three-layer coating and a coating process where the top coats are applied to the precoat by coating both fluids before drying in a multi-slot hopper or a slide hopper.
  • U.S. Patent 5,576,088 describes a two layer coating and a coating process where a top coat is cast coated on a precoat. All these examples describe a process that involves specialized equipment and coatings engineered to be compatible with the processes. In addition, production efficiencies may be lower.
  • a process is disclosed and claimed that allows the production of multi-layer coatings in which one or more top coats can be applied to a porous base coat to produce a uniform and defect-free coating layer.
  • a process is provided in which a liquid is applied to the base coat prior to top coating such that the air in the base coat is removed prior to top coating.
  • This process can occur in-line with a simple apparatus described therein.
  • An added benefit of this method is that it also allows the possibility of adding functionality or performing chemistry to the coatings after the base coat is dried and before the top coat is applied in a single process.
  • the wetting liquid may contain, but is not limited to, surfactants, pH modifiers, polymers, crosslinkers, pigments, and/or dye stabilizers.
  • porous glossy print media examples include (1) a high quality glossy paper, Epson White Film S041072 (an opaque polyester) for use with Epson's Stylus printer and (2) Accuplot EGF Glossy White Film, available from Mile High Engineering Supply Company (Denver, CO).
  • ink drop weight Ink drop weight, media coating weight, pigment/binder ratio in the media coating, particle size in the media coating, and surfactants in inks or media.
  • media coating weight Ink drop weight, media coating weight, pigment/binder ratio in the media coating, particle size in the media coating, and surfactants in inks or media.
  • the dot size increases compared to the current default dot size when printed with pigment-based inks in a Hewlett-Packard CP-2500 or CP-3500 printer.
  • polymers suitable for use in the present invention include polyvinyl alcohol and polyvinyl acetate copolymer, polyvinyl pyrrolidone, and other water-soluble polymers such as polyamides, cellulose derivatives, and polethylene oxide.
  • the colloidal silica or alumina dispersion have particle sizes in the range of about 1 to 300 nm.
  • the process of the present invention is directed to applying at least one ink-receiving porous layer to a non-porous substrate.
  • the process comprises:
  • the base coat and the top coat disclosed and claimed in related application Serial No. 09/491,642 each comprise one or more pigments and one or more binders, which are polymeric compounds soluble or dispersible in the solvent in which the base coat and top coat are applied to the substrate.
  • pigments include silica and alumina and its various hydrates, titania, carbonates (e.g., calcium carbonate, magnesium carbonate), glass beads, and organic pigments (e.g., plastic or polymer pigments such as cross-linked SBR latexes, micronized polyethylene or polypropylene wax, acrylic beads, and methacrylic beads).
  • the pigment may be the same in both the base coat and top coat or different.
  • the binder is a polymeric matrix which serves, among other things, to hold the pigment(s) in place.
  • the binder can be water-soluble or water-dispersible.
  • water-soluble binders include polyvinyl alcohol and its derivatives, polyvinyl pyrrolidone/polyvinyl acetate copolymer, cellulose derivatives, polyamides, and polyethylene oxide.
  • water-dispersed binders include styrene-butadiene latexes, polyacrylics, polyurethanes, and the like.
  • the binder may be the same in both the base coat and top coat or different.
  • the base coat and top coat are separately applied in solution to the substrate and allowed to dry.
  • the substrate comprises non-permeable (non-air permeable) material, such as a film-based material, e.g., Mylar, or a resin-coated papers (e.g., photobase paper).
  • non-permeable (non-air permeable) material such as a film-based material, e.g., Mylar, or a resin-coated papers (e.g., photobase paper).
  • pores in the base coat are saturated, or nearly saturated, with a liquid, also called a rewetting solution herein, before the top coat solution is applied.
  • a liquid also called a rewetting solution herein
  • the pores in the base coat are saturated with liquid before the top coat solution is applied.
  • a solvent that is compatible with the solvent in the top coating is believed to give the best adhesion between coating layers.
  • the liquid may comprise one or more solvents.
  • the liquid may be heated or chemically modified to increase the penetration rate in the precoat.
  • the liquid is heated to any temperature below its boiling point (or the minimum boiling point if two or more solvents are used).
  • chemically modified is meant the addition of one or more surfactants, adhesion promoters, pH modifiers, polymers, crosslinkers, pigments, and/or dye stabilizers to the liquid.
  • the chemically modified rewet solution thus serves to modify the properties of the base coat, top coat, the coating process, or the performance of the coatings as it relates to its use as a printing media.
  • Any of the usual surfactants, pH modifiers, and/or crosslinkers may be used in the practice of the present invention.
  • a suitable crosslinker added to the liquid is a borate or glyoxal. This process is especially useful for chemistries that are not compatible with the coating fluids or process.
  • excess fluid on the surface of the base coat be removed before top coating. This can be accomplished by a nip, doctoring blade, or the like.
  • FIG. 1 shows apparatus 10 disclosed in connection with the above-mentioned patent application, which is also useful in the process of the present invention.
  • the apparatus 10 which is a conventional coater, comprises a container 12 for containing a rewetting solution 14.
  • a web 16 comprises the non-absorbent substrate and a porous base coat thereon and the solution 14 is introduced onto the surface of the porous base coat by means of an applicator roller 18.
  • a hold-down roller 20 urges the web 16 against the top of the applicator roller 18.
  • the applicator roller 18 applies the liquid 14 to the web 16.
  • the liquid 14 is metered onto the applicator roller 18 by a metering roller 22, provided with a doctor 24, or other suitable means.
  • the excess rewet solution may be doctored off of the web.
  • the rewet solution can be metered by a pump directly onto the moving web 16, thus eliminating the need for doctoring.
  • the uptake of the liquid 14 depends on the speed of the web 16. It is desired to move the web 16 as fast as possible to maximize the coating efficiency.
  • the dwell time of the rewet fluid is defined as the time interval between application of the rewet fluid and application of the coating.
  • the dwell time thus determines the length of time available for the rewet solution to penetrate into the base coat.
  • the dwell time can be modified by the web speed and web distance between the rewet station and the coating station.
  • the length of time required to obtain adequate saturation of the base coat is determined by the design of the rewet station, the base coat properties, the top coat properties, and the rewet fluid properties. For this process to be effective, all of these parameters need to be accounted for when designing the coating process.
  • That invention provides a number of advantages. First, it permits applying a top coat solution on porous base coats formed on non-porous substrates. Second, it permits incorporation of materials for either the base coat or the top coat that would otherwise be incompatible with each other. Third, it allows incompatible liquids to be coated in multilayer systems.
  • a rewet solution is applied to the top coat.
  • the apparatus depicted in FIG. 1 is suitably employed in the practice of the present invention.
  • This rewet solution which is the second rewet solution employed (the first rewet solution being applied to the base coat layer), improves the top coating so that better dot gain is achieved on the coated media with pigment-based inks.
  • a liquid containing a water-soluble polymer or dilute inorganic pigment dispersion, such as colloidal silica or colloidal alumina is applied onto a porous coated medium (e.g., photobased paper) with an applicator to deliver enough volume to fill all the pores in the coating.
  • a metering device e.g., squeegee, towel, air knife
  • the wetted coating is then dried with hot air.
  • the thickness of the coating delivered by this process is estimated to be between 0.001 and 0.5 ⁇ m, and preferably no more than about 0.1 ⁇ m thick. If the coating is too thick, then the coating is likely to greatly decrease the rate of ink vehicle penetration, resulting in poor image quality.
  • water-soluble polymers suitable for use in the present invention include polyvinyl alcohol and polyvinyl acetate copolymer (e.g., Airvol 523 from Air Products), polyvinyl pyrrolidone (e.g., Luviskol K30 and K90 from BASF) and other water-soluble polymers such as polyamides, cellulose derivatives, and polethylene oxide.
  • concentration of the water-soluble polymer is in the range of about 0.1 to 5 wt% of the second rewet solution.
  • colloidal alumina examples include Nyacol AL 20 and Nyacol AL20DW, both available from Akzo Nobel/Eka Chemicals.
  • the range of concentration of the colloidal alumina is in the range of about 0.1 to 5 wt% of the second rewet soluction.
  • Surface tension reducing agents such as water-miscible organic solvents (e.g., iso-propanol and 1-butanol, concentration in the range of 0.1 to 50 wt% of the total rewet solution), polymers (e.g., polyvinyl alcohol-polyvinyl acetate, concentration in the range of 0.01 to 0.5 wt% of the total rewet solution), or surfactants may be added to the second rewet solution to achieve better wetting and coating uniformity.
  • water-miscible organic solvents e.g., iso-propanol and 1-butanol, concentration in the range of 0.1 to 50 wt% of the total rewet solution
  • polymers e.g., polyvinyl alcohol-polyvinyl acetate, concentration in the range of 0.01 to 0.5 wt% of the total rewet solution
  • surfactants may be added to the second rewet solution to achieve better wetting and coating uniformity.
  • the concentration of the surfactants is in the range of about 0.01 to 5 wt% of the second rewet solution.
  • a cross-linking agent may be added to the second rewet solution to strengthen the top coat and the base coat.
  • cross-linking agents that are suitably employed in the practice of the present invention include inorganic borates (e.g., sodium borate), glyoxal, and Tyzor, which is an organic titanate/zircronate available from E. I. Du Pont de Nemours Co.
  • concentration of the cross-linking agent is in the range of about 0.1 to 10 wt% of the second rewet solution.
  • All media were printed with a Hewlett-Packard CP-2500 printer, employing a test plot. The dot size was measured by an image analysis instrument or a microscope.
  • the control media was that described in related application Serial No. 09/491,642, that is, a porous print medium coated with a base coat, a first rewet solution, and a top coat.
  • a base coat and a subsequent top coat were coated onto a glossy print medium.
  • the base coat and top coat had the composition listed in Table I below.
  • a first rewet solution comprising heated water, was coated onto the base coat and excess was removed before applying the top coat.
  • Compositions of Base Coat and Top Coat were coated onto a glossy print medium.
  • compositions of Second Rewet Solution Containing Polymer Composition Concentration, wt% Control --- Airvol 523 (polyvinyl alcohol) 1% K90 (polyvinyl pyrrolidone) 1% K90 (polyvinyl pyrrolidone) 3% Compositions of Second Rewet Solution Containing Colloidal Dispersion.
  • Coated media after drying of the second rewet solution, were printed with Hewlett-Packard ultraviolet (UV) pigment-based inks on an H-P DesignJet 2500CP printer.
  • UV Hewlett-Packard ultraviolet
  • FIGS. 3a-3b for compositions listed in Table II
  • FIGS. 4a-4b for compositions listed in Table III
  • All samples showed similar image quality (IQ) (bleed, gamut and area fill uniformity) to the control.
  • the average dot size represents the average dot size of different colors. All materials are seen to have larger dot diameter than the default media ("None"). Some of the materials can also be used to enhance the media gloss (>11).
  • Coating defects may occur during the rewet process due to the high surface tension of the dilute pigment dispersion.
  • Various surface tension reducing agents such as iso-propanol (IPA), 1-butanol (BuOH), polyvinyl alcohol-polyvinyl acetate (e.g., Airvol 523), Surfynol (from Air Products), and Dynol (from Air Products) can be incorporated in the wash coat to achieve better wetting and uniformity. Examples and results are summarized in Table V. Dot Size Measurements and Gloss Measurements of Different Pigment Wash Coats with Addition of Surface Tension Reducing Agent Rewet Fluid Ave.
  • the addition of the surface tension reducing agent provides a smoother coating of the rewet solution, without adversely affecting the dot size and the media gloss.
  • a cross-linking agent that is known to cross link the top coat or the base coat can be added to the wash coat for adhesion or durability enhancement of the coating.
  • cross-linking agents include glyoxal and Tyzor (available from du Pont). The results are summarized in Table VI. Dot Size Measurements and Gloss Measurements of Different Pigment Wash Coats with Addition of Various Cross-Linking Agents. Rewet Fluid Ave.
  • cross-linking agent served to strengthen the top coat and the base coat, without adversely affecting the dot size and media gloss advantages provided by the second rewet solution of the present invention.
  • the process of the present invention is expected to find use in thermal ink-jet printing onto porous glossy print media.

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  • Ink Jet (AREA)
  • Ink Jet Recording Methods And Recording Media Thereof (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
EP20010300347 2000-01-27 2001-01-16 Verfahren zum Vergrössern der Punktegrösse auf einer porösen mit pigmentierten Tinten bedruckten Unterlage Expired - Lifetime EP1120280B1 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US491642 2000-01-27
US09/491,642 US6475612B1 (en) 2000-01-27 2000-01-27 Process for applying a topcoat to a porous basecoat
US545934 2000-04-10
US09/545,934 US6451379B1 (en) 2000-01-27 2000-04-10 Increasing dot size on porous media printed with pigmented inks

Publications (3)

Publication Number Publication Date
EP1120280A2 true EP1120280A2 (de) 2001-08-01
EP1120280A3 EP1120280A3 (de) 2001-09-05
EP1120280B1 EP1120280B1 (de) 2005-06-29

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EP20010300347 Expired - Lifetime EP1120280B1 (de) 2000-01-27 2001-01-16 Verfahren zum Vergrössern der Punktegrösse auf einer porösen mit pigmentierten Tinten bedruckten Unterlage

Country Status (3)

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EP (1) EP1120280B1 (de)
JP (1) JP3973841B2 (de)
DE (1) DE60111655T2 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7585553B2 (en) 2002-05-24 2009-09-08 Hewlett-Packard Development Company, L.P. Inkjet media coating with improved lightfastness, scratch resistance, and image quality

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4849286A (en) * 1987-12-14 1989-07-18 James River Graphics, Inc. Transparent plotter film
ATE125491T1 (de) * 1989-11-14 1995-08-15 Canon Kk Verfahren zur herstellung eines aufzeichnungsmaterials.
JPH04214393A (ja) * 1990-12-12 1992-08-05 Nisshinbo Ind Inc 昇華型感熱転写受像紙
US6465086B1 (en) * 1997-05-15 2002-10-15 Oji Paper Co., Ltd. Ink jet recording material and process for producing same
WO1998052765A1 (en) * 1997-05-23 1998-11-26 Nashua Corporation Glossy ink jet paper

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7585553B2 (en) 2002-05-24 2009-09-08 Hewlett-Packard Development Company, L.P. Inkjet media coating with improved lightfastness, scratch resistance, and image quality

Also Published As

Publication number Publication date
DE60111655D1 (de) 2005-08-04
DE60111655T2 (de) 2006-05-04
JP3973841B2 (ja) 2007-09-12
EP1120280B1 (de) 2005-06-29
JP2001246842A (ja) 2001-09-11
EP1120280A3 (de) 2001-09-05

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