EP0878323B1 - Feuille pour l'enregistrement par jet d'encre - Google Patents

Feuille pour l'enregistrement par jet d'encre Download PDF

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Publication number
EP0878323B1
EP0878323B1 EP19980303758 EP98303758A EP0878323B1 EP 0878323 B1 EP0878323 B1 EP 0878323B1 EP 19980303758 EP19980303758 EP 19980303758 EP 98303758 A EP98303758 A EP 98303758A EP 0878323 B1 EP0878323 B1 EP 0878323B1
Authority
EP
European Patent Office
Prior art keywords
ink
receptor layer
sheet according
ink receptor
vinyl
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.)
Expired - Lifetime
Application number
EP19980303758
Other languages
German (de)
English (en)
Other versions
EP0878323A1 (fr
Inventor
Kiyoshi Iwamoto
Senichi Yoshizawa
Hiroyuki Onishi
Masaaki Itano
Akio Owatari
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.)
Seiko Epson Corp
Tomoegawa Co Ltd
Original Assignee
Seiko Epson Corp
Tomoegawa Paper Co Ltd
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
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Application filed by Seiko Epson Corp, Tomoegawa Paper Co Ltd filed Critical Seiko Epson Corp
Publication of EP0878323A1 publication Critical patent/EP0878323A1/fr
Application granted granted Critical
Publication of EP0878323B1 publication Critical patent/EP0878323B1/fr
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
    • B41M5/52—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
    • B41M5/5245—Macromolecular coatings characterised by the use of polymers containing cationic or anionic groups, e.g. mordants
    • 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 relates to an inkjet recording sheet. More specifically, it relates to an inkjet recording sheet whose discoloration, which is caused with the passage of time, is prevented.
  • Inkjet printers are widely used since they have features in clearness of colors, noiselessness and easiness in color expression. Inkjet printers use not a solvent-containing ink but a water-based ink for environmental safety. Generally, an ink contains, as main components, a colorant such as pigment or a dye, a water-based or water-soluble solvent, an additive, and the like. As an ink for an inkjet printer, there is used an ink which is not easily dried, in order to prevent the clogging of a nozzle caused by the drying of the ink.
  • a recording sheet for use with an inkjet printer is particularly required to have the capability of receiving water-based materials in order to cope with the above property of an ink. For this reason, there are generally used inkjet recording sheets having a structure in which an ink receptor layer capable of well receiving the ink is formed on a substrate.
  • an ink receptor layer which is formed by preparing, as a main component, a system containing a water-soluble polymer such as polyvinyl alcohol and a highly water-absorptive pigment such as silica and further incorporating other water-soluble polymer(s) and additives to the main component.
  • the water-soluble polymer other than polyvinyl alcohol, etc. is used for improving the clearness of an image, the color formability of an ink or the fixing properties of an ink when the ink is used for recording with an inkjet printer.
  • a polymer containing a basic nitrogen atom has been proposed. The absorbability to an ink and the clearness of an image are improved by incorporating the above polymer.
  • An inkjet recording sheet having a conventional ink receptor layer containing the above polymer containing a basic nitrogen atom has no practically sufficient storage durability and has a defect that it turns yellowish or reddish with the passage of time.
  • inkjet printers tend to be used for full color printing.
  • a recording sheet for full color printing is required to have a high whiteness, and the above defect particularly remains to solve.
  • EP-A-627324 discloses ink receptor layers containing polymers prepared from monomer compositions comprising dimethylaminopropylacrylamide and N-vinylpyrrolidone. There is no appreciation in that document of the discolouration over time caused by the presence of polymerisation inhibitor in the ink receptor layer.
  • an inkjet recording sheet comprising a substrate and, provided thereon, an ink receptor layer comprising:
  • the present invention also provides a process for preparing a printed image, which process comprises applying a water based ink to a recording sheet according to the invention using an inkjet printer.
  • the ink receptor layer contains a polymerization inhibitor in a decreased amount of 500 ppm or less, preferably 300 ppm or less, particularly preferably 200 ppm or less.
  • the substrate for use in the inkjet recording sheet of the present invention includes non-transparent substrates such as paper, cloth and non-woven fabric, films obtained from plastics such as polyethylene terephthalate, diacetate cellulose, triacetate cellulose, an acrylic polymer, Cellophane, celluloid, polyvinyl chloride, polycarbonate and polyimide, a wooden plate and a glass plate.
  • the substrate is selected as required depending upon an object in recording, use of a recorded image or adhesion to an ink receptor layer.
  • the vinyl-polymerizable monomer containing a basic nitrogen atom includes N,N-dimethylaminoethyl (meth)acrylate, N,N-diethylaminoethyl (meth)acrylate, acrylamide, diacetylacrylamide, N-methylolacrylamide, N-vinylpyridine, N-vinylpyrrolidone, N-vinyloxazoline, N-vinyloxazolidone, N-vinylformamide, N-vinylamine, and quaternary ammonium salts obtained from these.
  • N,N-dimethylaminoethyl (meth)acrylate, N,N-diethylaminoethyl (meth)acrylate, N-vinylamine and quaternary ammonium salts of these are preferred. That is because a polymer obtained from a monomer component containing at least one monomer selected from the above N,N-dimethylaminoethyl (meth)acrylate, N,N-diethylaminoethyl (meth)acrylate, N-vinylamine or quaternary ammonium salts of these gives an inkjet recording sheet which is excellent in absorption of an ink and the clearness of a color image.
  • the present invention uses a homopolymer or a copolymer obtained from the above vinyl-polymerizable monomer containing a basic nitrogen atom.
  • the above copolymer is obtained from a combination of the above monomers or from at least one of the above monomers and other vinyl monomer.
  • the "other" vinyl monomer includes (meth)acrylic acid and ester derivatives thereof, and also includes vinyl alcohol, vinyl acetate, styrene and derivatives of these.
  • the monomex composition typically further comprises (meth)acrylic acid or an ester thereof, or vinyl alcohol, vinyl acetate, styrene or a derivative thereof.
  • a resin other than the polymer obtained from the vinyl-polymerizable monomer containing a basic nitrogen atom there may be incorporated a resin other than the polymer obtained from the vinyl-polymerizable monomer containing a basic nitrogen atom.
  • the above "other" resin includes an acrylic resin, a polyester resin, a polyurethane resin, a styrenebutadiene copolymer resin, an acrylonitrile-butadiene copolymer resin, a polyvinyl alcohol resin, a water-soluble polyvinyl acetal resin, a polyvinyl butyral resin, other vinyl resin, an amide resin, oxidized starch, casein, polyethylene oxide, a silicone resin, a rosin-modified maleic acid resin, a rosin-modified phenolic resin, an alkyd resin, and a coumarone-indene resin.
  • a water-soluble resin such as a polyvinyl alcohol resin or a water-soluble polyvinyl acetal resin is preferred in view of the absorptivity to an ink, the drying properties of an ink and the clearness of an image.
  • the discoloration can be prevented by decreasing the content of a polymerization inhibitor which is generally contained in a polymer obtained from a monomer component containing a vinyl-polymerizable monomer containing a basic nitrogen atom.
  • the method of decreasing the content of a polymerization inhibitor in the ink receptor layer is not specially limited.
  • the content of a polymerization inhibitor can be decreased by one of the following methods.
  • the polymerization inhibitor includes diphenylpicrylhydrazyl (DPPH), di-p-fluorophenylamine, tri-p-nitrophenylmethyl, benzoquinone, chloranil, p-tert-butyl catechol, hydroquinone m-nitrobenzene, nitrobenzene and p-phenyldiamine.
  • DPPH diphenylpicrylhydrazyl
  • di-p-fluorophenylamine tri-p-nitrophenylmethyl
  • benzoquinone chloranil
  • p-tert-butyl catechol hydroquinone m-nitrobenzene
  • nitrobenzene nitrobenzene
  • p-phenyldiamine p-phenyldiamine
  • a pigment may be incorporated into the ink receptor layer.
  • the ink receptor layer further comprises a pigment in an amount of from 40 to 95% by weight.
  • the pigment can be selected from conventional fillers and organic or inorganic pigments such as silica, clay, mica, swelling mica, talc, kaolin, diatomaceous earth, calcium carbonate, barium sulfate, aluminum silicate, synthetic zeolite, alumina, zinc oxide, lithopone and satin white.
  • the average particle diameter volume average particle diameter measured by coulter counter method
  • the ink receptor layer preferably contains 5 to 100 % by weight of the polymer obtainable from a monomer composition comprising a vinyl-polymerizable monomer containing a basic nitrogen atom.
  • the ink receptor layer preferably contains 5 to 60 % by weight of the above polymer.
  • the content of the pigment in the ink receptor layer is preferably 40 to 95 % by weight, particularly preferably 60 to 90 % by weight.
  • the ink receptor layer containing the above polymer and the pigment in the above amount ratio particularly attains excellent absorptivity to an ink and excellent clearness of an image.
  • the ink receptor layer may contain other additive for improving water resistance and preventing bleeding.
  • the above "other" additive includes a melamine formaldehyde resin, a urea formaldehyde resin, glyoxazole and zirconium carbonate ammonium.
  • the ink receptor layer may contain various additives such as a dispersing agent, a fluorescent dye, a pH adjuster, an anti-foaming agent, a lubricant and an antiseptic.
  • the ink receptor layer is formed on a substrate by dissolving or dispersing materials for forming the ink receptor layer in water or a proper solvent to obtain a coating solution or dispersion and applying the coating solution or dispersion onto the substrate according to a proper application method such as a roll coating method, a blade coating method, a gravure coating method, comma coating method, a rod bar coating method, an air knife coating method or a dye coating method. Further, the above coating solution or dispersion may be laminated on the substrate by a hot melt coating method or a laminate coating method.
  • the ink receptor layer may have a laminate structure of at least two layers.
  • the ink receptor layer is provided on the substrate in an amount of from 5 to 30 g/m 2 , particularly preferably 10 to 20 g/m 2 .
  • the application amount exceeds 30 g/m 2 , the ink receptor layer is not improved in properties any further.
  • the application amount is less than 5 g/m 2 , the absorptivity to an ink may be insufficient.
  • the inkjet recording sheet of the present invention may be provided with added value by imparting its surface with a gloss.
  • the gloss may be imparted by a method in which the ink receptor layer is formed according to a cast coating method, a method in which the ink receptor layer is surface treated with a calender or a method in which a glossy layer is laminated on the ink receptor layer.
  • the layer imparted with gloss preferably has a glossiness of at least 10 according to a 60 degree surface glossiness test.
  • the glossy layer preferably contains, as main components, the same resin and the same pigment as those used for the ink receptor layer, -since the glossy layer is improved in adhesion to the ink receptor layer.
  • the glossy layer is produced and laminated, for example, by a method in which a coating composition for forming the glossy layer is applied to a substrate film which shows poor adhesion to materials for forming the glossy layer, such as a polyolefin resin film, an ethylene tetrafluoride resin film or a film treated with a peeling silicone, then, the resultant laminate is stacked on the ink receptor layer, drying the stacked product and peeling the substrate film.
  • a coating composition for forming the glossy layer is applied to a substrate film which shows poor adhesion to materials for forming the glossy layer, such as a polyolefin resin film, an ethylene tetrafluoride resin film or a film treated with a peeling silicone
  • the amount ratio of a binder resin and a pigment is as follows.
  • the amount of the binder resin based on the pigment is preferably 5 to 50 % by weight, particularly preferably 5 to 30 % by weight.
  • the thickness of the glossy layer is preferably 5 to 12 ⁇ m, particularly preferably 8 to 10 ⁇ m.
  • Polymers were prepared from monomers shown in the following Table 1 according to a solution polymerization method.
  • PEx. Monomer containing basic nitrogen atom (A) Comonomer (B) Copolymerization ratio A/B Polymerization inhibitor Amount of polymerization inhibitor 1 Dimethyl aminoethyl methacrylate Acrylic acid 95/5 Hydroquinone monomethyl ether 50 ppm 2 Quaternay ammonium salt from dimethylaminoethyl methacrylate Styrene 90/10 Hydroquinone monomethyl ether 50 ppm 3 Polyvinylamine Nil 100/0 Nil Nil 4 Polyvinylamine Acrylic acid 95/5 Nil Nil 5 Dimethylaminoethyl methacrylate Acrylic acid 95/5 Hydroquinone monomethyl ether 250 ppm 6 Dimethylaminoethyl methacrylate Acrylic acid 95/5 Hydroquinone monomethyl ether 500 ppm 7 Dimethylaminoethyl methacrylate Acrylic acid 95/5 Hydroquinone monomethyl ether 1,000 pp
  • the polymer was prepared by hydrolyzing a polyvinylformamide aqueous solution with sodium hydroxide.
  • Coating composition for ink receptor layer Polymer obtained in one of Preparation Examples 1 to 7 (solid content 37 %) 250 parts Silica ("CARPLEX BS304F", supplied by Shionogi Pharmaceutical) 180 parts Water 850 parts
  • the above coating composition was applied to a corona-discharge-treated 100 ⁇ m thick polyester film so as to form a coating having a dry weight of 15 g/m 2 and dried to form an ink receptor layer. In this manner, inkjet recording sheets of the present invention were obtained.
  • An inkjet recording sheet was obtained in the same manner as in Example 1 except that the polymer contained in the coating composition for forming the ink receptor layer was replaced with a polyvinyl alcohol ("GOHSENOL T-330, 10 % aqueous solution, supplied by Nippon Gosei Kagaku K.K.).
  • a polyvinyl alcohol "GOHSENOL T-330, 10 % aqueous solution, supplied by Nippon Gosei Kagaku K.K.
  • the inkjet recording sheets obtained in Examples 1 to 7 and Comparative Examples 1 and 2 were cut to a size of A4 (210 mm x 297 mm), and color printing was effected on each sheet with an inkjet printer ("MJ-5000C” supplied by Seiko-Epson) using an inkjet printing ink (“MJIC2C” supplied by Seiko-Epson).
  • the resultant printed products were evaluated for various properties or performances as follows. Table 2 shows the results.
  • a sheet was allowed to stand indoors for 7 days, and then evaluated for a degree of discoloration.
  • a printed product was visually evaluated for clearness of an image and color formability of the ink.
  • a sheet of paper was stacked on a printed product immediately after it was obtained, and a finger was rubbed against the paper to visually evaluate the transfer of the ink to the paper.
  • an inkjet recording sheet which is excellent in color formability and fixing properties required of inkjet recording sheets and which is also excellent in the performance of prevention of discoloration.

Landscapes

  • Ink Jet Recording Methods And Recording Media Thereof (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Paper (AREA)

Claims (10)

  1. Feuille d'enregistrement par jet d'encre, comprenant un substrat et, prévue sur celui-ci, une couche réceptrice d'encre comprenant :
    (a) un polymère pouvant être obtenu par polymérisation d'une composition de monomère comprenant un monomère à polymérisation vinylique contenant un atome d'azote basique ; et
    (b) 500 ppm ou moins d'un inhibiteur de polymérisation.
  2. Feuille selon la revendication 1, dans laquelle la couche réceptrice d'encre contient de 5 à 100 % en poids de polymère (a).
  3. Feuille selon la revendication 1 ou 2, dans laquelle la couche réceptrice d'encre comprend, en outre, un pigment en une quantité de 40 à 95 % en poids.
  4. Feuille selon l'une quelconque des revendications précédentes, dans laquelle le monomère à polymérisation vinylique est choisi parmi le (méth)acrylate de N,N-diméthylaminoéthyle, le (méth)acrylate de N,N-diéthylaminoéthyle, la N-vinylamine et des sels d'ammonium quaternaire de ceux-ci.
  5. Feuille selon l'une quelconque des revendications précédentes, dans laquelle l'inhibiteur de polymérisation est présent dans la couche réceptrice d'encre en une quantité de 300 ppm ou moins.
  6. Feuille selon l'une quelconque des revendications précédentes, dans laquelle la couche réceptrice d'encre comprend, en outre, une résine d'alcool polyvinylique ou une résine de polyvinylacétal soluble dans l'eau.
  7. Feuille selon l'une quelconque des revendications précédentes, dans laquelle la composition de monomère comprend, en outre, de l'acide (méth)acrylique ou un ester de celui-ci, ou de l'alcool vinylique, de l'acétate de vinyle, du styrène ou un dérivé de celui-ci.
  8. Feuille selon l'une quelconque des revendications précédentes, dans laquelle la couche réceptrice d'encre est prévue sur le substrat en une quantité de 5 à 30 g/m2.
  9. Procédé de préparation d'une image imprimée, lequel procédé comprend l'application d'une encre à base d'eau sur une feuille d'enregistrement selon l'une quelconque des revendications précédentes en utilisant une imprimante à jet d'encre.
  10. Image imprimée pouvant être obtenue par un procédé selon la revendication 9.
EP19980303758 1997-05-13 1998-05-13 Feuille pour l'enregistrement par jet d'encre Expired - Lifetime EP0878323B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP13756797 1997-05-13
JP13756797A JP3242349B2 (ja) 1997-05-13 1997-05-13 インクジェット用記録シート
JP137567/97 1997-05-13

Publications (2)

Publication Number Publication Date
EP0878323A1 EP0878323A1 (fr) 1998-11-18
EP0878323B1 true EP0878323B1 (fr) 2002-07-24

Family

ID=15201742

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19980303758 Expired - Lifetime EP0878323B1 (fr) 1997-05-13 1998-05-13 Feuille pour l'enregistrement par jet d'encre

Country Status (3)

Country Link
EP (1) EP0878323B1 (fr)
JP (1) JP3242349B2 (fr)
DE (1) DE69806684T2 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1029703B1 (fr) * 1999-02-16 2004-05-12 Oji Paper Co., Ltd. Matériau pour l'enregistrement par jet d'encre avec meilleure résistance à la lumière
US20050037159A1 (en) * 2003-08-14 2005-02-17 Kurian Manelal Chirayil Jacob High-resolution high-density positive image producing film using an ink jet printing machine and a method of making such a film

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5439739A (en) * 1993-06-03 1995-08-08 Mitsubishi Paper Mills Limited Ink jet recording medium
JP3667410B2 (ja) * 1995-12-28 2005-07-06 日本化薬株式会社 インクジエット記録方式用紫外線硬化性樹脂組成物及びその硬化物

Also Published As

Publication number Publication date
DE69806684D1 (de) 2002-08-29
JP3242349B2 (ja) 2001-12-25
JPH10309864A (ja) 1998-11-24
DE69806684T2 (de) 2002-11-21
EP0878323A1 (fr) 1998-11-18

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