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
  • B41M5/5218—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
  • B41M5/5236—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
  • B41M5/5245—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 a cast coated paper having an excellent surface gloss and a high quality photographic print image quality and suitable for an ink jet printer, and more particularly, to a photographic print manufactured by an inkjet gelling method. Gloss recording ink jet recording paper.
• Cast paper is usually a mineral pigment coated paper with a high surface gloss and smoothness, and because of its excellent printability, it is commonly used as inkjet recording paper for photo printing. I have.
• a cast coat layer having high gloss has a structure in which a coating layer is dense, and therefore has a limit in ink absorbability, and thus has a surface which is not suitable as ink jet recording paper.
• ink-jet recording paper must have a porous coating layer and sufficient ink absorbency, but on the other hand, a porous coating layer has the contradictory property that it is difficult to obtain high brightness. have. Therefore, it is very difficult to simultaneously satisfy both the surface gloss and the suitability for inkjet recording of the cast coat paper with only one coating layer, and it has not been put to practical use. Disclosure of the invention
• an object of the present invention is to provide an ink jet recording paper suitable for an ink jet printer, which can obtain a photo print quality of 70% or more in glossiness with only one coating layer.
• the glossy ink jet recording paper for photographic printing according to the present invention has only one coating layer, and the coating layer is formed of at least colloidal silica, plastic pigment, polybutyl alcohol (PVA) and polydiaryl dimethyl ammonium. ⁇ ⁇ ⁇ It is characterized by containing Mukoku Ride (poly-D admac). Further, the glossy inkjet recording paper for photo printing according to the present invention, wherein the coating layer further contains at least one selected from the group consisting of precipitated silica, styrene butadiene latex (SBR), and polyethylene wax. It is characterized by doing.
• the glossy inkjet recording paper for photo printing according to the present invention is characterized in that the coating layer is coated by a wet gelling method. Further, the glossy ink jet recording paper for photographic printing according to the present invention is characterized in that the gelling agent obtained by the above-mentioned jetting method is polyacrylic acid (PAA).
• PAA polyacrylic acid
• FIG. 1 shows a cast coating apparatus used in the wet gel process of the present invention.
• the supplied base paper 1 is applied with a cast coating solution using an air knife coater 2, and then an acid solution is flowed over a roll with a dip coater 3 to cast the base paper.
• the liquid is gelled, then passed through a nip 6 between a press roll 4 and a casting drum 5 and pressed against a heated mirror-like casting drum 5 to be dried and finished.
• a press roll 4 When producing this type of paper by wet gelling, very important factors are that the coating layer on the base paper is gelled before it contacts the cast drum surface, that it is in a proper wet state, And have sufficient surface strength when pressed against the cast drum surface by a press roll.
• Another usually troublesome property is that if the surface coating is too dense, it will be difficult to absorb ink on the surface coating.
• the wet gel process in the cast coating equipment forms a strong gel when immersed in an acid solution, which allows it to pass through the press nip at a higher pressure, thus reducing the performance of the coating solution.
• Dependent If the strength of the resulting gel is not strong, the coating solution will dissolve in the acid solution, even though the remaining acid will be used in the next step. As a result, in the next process, the paper becomes dirty and the gloss is reduced.
• the present inventors have repeated various experiments and developed a cast coating solution satisfying the above conditions.
• the components of the coating layer are prevented from being dissolved in the polyacrylic acid solution at two nips between the casting drums. What is more important is that the surface of the coating layer can be kept clean and a highly glossy surface can be obtained with only one coating layer.
• the cast coating liquid used in the present invention includes plastic pigment as a pigment, precipitated silica, colloidal silica, SBR latex (styrene-butadiene latex) as a binder, fully hydrolyzed polyvinyl alcohol (PVA) and poly It is composed of main components such as do-d-mac polymer (poly-D-admac, polydiaryl dimethyl ammonium chloride).
• the particle size of the precipitated silica is of the order of 5 to 15 / X HI, preferably 8 to 12 nm. Colloidal silica particle size ranges from 10 to 20 nm, PAA solution concentration from 5-1 A range of 0% is preferred. Further, a coverage of the cast coating liquid 1 5 ⁇ 20 gZm 2 extent good, also cast temperature of the drum 100 ° C ⁇ 1 20 ° C, pressure pressure to cast drum at a linear pressure 110-150 kg / cm is desirable.
• the following shows the standard test methods and evaluation standards for evaluating the quality of ink jet recording paper.
• coating liquid A one having the following composition was used.
• the gelling agent an aqueous solution of polyacrylic acid was used at a concentration of 7.5% (all component contents represent weight%).
• Colloidal silica 61.0% Plastic pigment 6.1%
• Table 1 shows the results of the obtained inkjet test.
• coating liquid B one having the following composition was used.
• the gelling agent used was an aqueous solution of polyacrylic acid at a concentration of 7.5%.
• Colloidal silica 71.4%
• Table 2 shows the results of the obtained ink jet test.
• a comparative example an example in which two coating layers which are usually performed is provided.
• the following compositions were used as the precoat coating solution D and the topcoat application solution E, respectively.
• gelation was not performed.
• Colloidal silica 71.0%
• the measurement results of the cast paper obtained using the two-layer coating solution of tota100 are as follows.
• Pre-coating weight 10. 0 g / m 2
• Table 3 shows the results of the obtained ink jet test.
• the cast paper obtained according to the present invention has only one coating layer, and is different from the case where the conventional two coating layers are provided. It has been confirmed that it has the same or higher white gloss (Sheet Gloss) and gloss (highest value) and also has excellent ink jet characteristics.
• the ink jet recording paper obtained according to the present invention has excellent ink jet recording characteristics such as feathering, bleeding, uniformity of printing, permeability, optical density, water retention, and weather resistance with only one coating layer. As well as maintaining a porous coating layer, it also has excellent white gloss (Sheet Gloss) and gloss (highest value), so high quality photo print quality can be obtained. Has the effect of
• FIG. 1 is a view showing a cast coating apparatus used in the wet gel process of the present invention.

Landscapes

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

Applications Claiming Priority (2)

Publications (1)

Family

ID=19013666

Family Applications (1)

Country Status (3)

Cited By (1)

Families Citing this family (5)

Citations (5)

• 2001
  • 2001-06-07 JP JP2001171976A patent/JP3954327B2/ja not_active Expired - Fee Related
• 2002
  • 2002-06-07 CN CN 02811308 patent/CN1278869C/zh not_active Expired - Fee Related
  • 2002-06-07 WO PCT/JP2002/005681 patent/WO2003013872A1/ja active Application Filing

Patent Citations (5)

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