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
  • B41M5/508—Supports
• • 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
  • D21H19/38—Coatings with pigments characterised by the pigments
  • D21H19/40—Coatings with pigments characterised by the pigments siliceous, e.g. 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
  • B41M5/5218—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
  • B41M5/5254—Macromolecular coatings characterised by the use of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds, e.g. vinyl polymers
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T428/00—Stock material or miscellaneous articles
  • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
  • Y10T428/24802—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]
  • Y10T428/24893—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.] including particulate material
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T428/00—Stock material or miscellaneous articles
  • Y10T428/27—Web or sheet containing structurally defined element or component, the element or component having a specified weight per unit area [e.g., gms/sq cm, lbs/sq ft, etc.]
  • Y10T428/273—Web or sheet containing structurally defined element or component, the element or component having a specified weight per unit area [e.g., gms/sq cm, lbs/sq ft, etc.] of coating
  • Y10T428/277—Cellulosic substrate
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T428/00—Stock material or miscellaneous articles
  • Y10T428/31504—Composite [nonstructural laminate]
  • Y10T428/31971—Of carbohydrate
  • Y10T428/31993—Of paper

Definitions

• the invention relates to a coated recording paper for ink jet recorders or for the ink jet recording method, which for recording is suitable at high speed.
• the ink spray recording method has the advantage that it is quiet and multi-color records can be easily made. It is used in facsimile machines and for various printers.
• the recording papers for ink-jet recording processes are divided into conventional and coated recording papers.
• the conventional recording papers with a low degree of sizing have good ink absorbency; however, the clarity of the recording suffers from the diffusion of the ink in the sheet layer, in particular the image resolution and color density are unsatisfactory in the case of multicolor recordings. Therefore, investigations were carried out with coated recording papers with superior image resolution.
• the coated recording papers provide superior image density and clarity because the dye of the ink in the coating is locally absorbed and does not bleed.
• such recording papers have the disadvantage that they are not so suitable for rapid recording because of their insufficient ink absorption capacity.
• the rapid recording by the ink jet recording method has to be improved, as in other recording methods such as screen dot recording, electrostatic recording, heat sensitive recording, etc.
• a recording device there is a faster one Multi-nozzle type printer using a foam jet system has already been developed.
• the coated recording paper which has a superior image resolution, has the disadvantage that the ink papers for ink-jet recording processes have the disadvantage that the dry state of the ink is unstable because the ink drops ejected from the nozzles after being adhered to the surface of the recording paper are absorbed inside and only seemingly are available in a dry state.
• fast recording such as the contact of papers with each other after recording, the transfer and scratching of the ink during transportation by the roller of the recording apparatus, etc., which are not found in other recording methods.
• the invention is based on the object of providing a coated recording paper for ink jet recorders or for ink spray recording processes which is better suited for rapid recording.
• This object is achieved in that a support with a degree of sizing according to Stöckigt of less than 4 seconds (based on a weight per unit area of 60 g / m 2 ) is used and this is provided with a coating which has fine silicon dioxide with a specific surface area of at least 200 m 2 / g, determined by the BET method, and with a uniformity n of the Rosin-Rammler distribution of at least 1.10 and contains a water-soluble, polymeric binder.
• Fine pigment with a specific surface area of at least 200 m 2 / g, determined by the BET method, and with a uniformity number n of the Rosin-Rammler distribution of at least 1.10 is used as the pigment according to the invention in the coating composition.
• the use of a pigment based on silicon dioxide as a coating material for the surface of the ink spray paper is described in JA-OS 51583/1980. However, the silicon dioxide described there has different properties and is of a different nature.
• the fine silica selected in accordance with the invention results in a recording paper which is superior in color density, hue, clarity and suitability for rapid recording.
• the first requirement of the silicon dioxide according to the invention is that it has a specific surface area of at least 200 m 2 / g.
• a coating that contains silicon dioxide with a large specific surface area as the main component results in superior color density and clarity.
• the silicon dioxide according to the invention must meet the second condition that it has a uniformity n of the Rosin-Rammler distribution of at least 1.10. Such a large uniformity number n means a narrow particle distribution.
• a silica with a large specific surface area and a narrow particle distribution results in a particularly superior ink absorption capacity.
• the right choice of silicon dioxide gives a coating that is particularly suitable for rapid recording. Generally the coating has the structure of a dense layer of pigment and binder. It was not believed, therefore, that the superior absorbency that conventional ink jet recording papers have can be achieved with a coated paper.
• a paper with a Stöckigt glue strength of less than 4 seconds (based on a basis weight of 60 g / m 2 ) is used according to the invention.
• a Stöckigt sizing degree of less than 4 seconds (based on a basis weight of 60 gfm 2 ) means that the ratio of Stöckigt sizing degree / basis weight [(second) / (g / m 2 )] is less than 0.07. That is, the ink component that flows through the coating easily penetrates into the carrier and is absorbed by it because the carrier has no or only a small degree of sizing.
• silica pigments that meet the above two conditions are, for example, SILCRON G100, SILCRON 600 (manufactured by Nissan Chemical Industries, Ltd.), SYLOID 404, SYLOID 79, SYLOID 74 (manufactured by Fuji-Davison Chemical Ltd. ), GASIL HP-34 (manufactured by Joseph Crossfield & Sons, Ltd.), Finesil X27, Finesil X37, Finesil 79 (manufactured by Tokuyama Soda Co., Ltd.), CARPLEX No.80 (manufactured by Shionogi & Co., Ltd.) etc.
• a water-soluble polymeric binder is suitable as the binder which is used in combination with the above-mentioned silicon dioxide pigments.
• Polyvinyl alcohol and its derivatives are particularly desirable in terms of color density, but one can also use oxidized starch, modified starch, rubber compounds, e.g. Guar gum and the like, sodium alginate, water-soluble cellulose derivatives, e.g. Hydroxyethyl cellulose, methyl cellulose, carboxymethyl cellulose etc., water soluble proteins e.g. Soybean protein, casein and the like, water soluble polymeric compounds e.g. Polyvinyl pyrrolidone and the like.
• a fairly large amount of pigment according to the invention is preferably used in the preparation of the coating composition, i.e. a weight ratio (expressed as a solid weight) of silicon dioxide according to the invention to water-soluble polymeric binder of about 60-95: 40-5.
• the silicon dioxide according to the invention can optionally be used together with other pigments, e.g. Kaolin, talc, calcium carbonate, magnesium carbonate, barium sulfate, titanium white, organic fillers and the like can be used.
• the coating can be carried out using customary application devices, for example doctor blade spreaders, air brush spreaders, bar spreaders, roller spreaders and the like, or size presses.
• the coating amount is preferably 3 to 15 g / m 2 on one surface of the support; too much coating leads to poor ink absorbency.
• the ink spray recording was made with a Panafax 6000 (manufactured by Matsushita Graphic Communication Systems, Inc.).
• a two-nozzle ink jet recording device was used to produce two-color printing with black and red inks.
• the red ink was ejected for 10 seconds, then both red and black ink were ejected for 5 seconds, and finally a black ink was ejected for 10 seconds.
• the respective recording width of the red and black ink was 24 mm and the overlapping recording width of red and black ink in the central area was 8 mm.
• the reflection density of the recording surface was measured with a Macbeth density meter, the reflection density of the red recording surface using green filter for the magenta color and of blue filter for the yellow color and the reflection density of the black recording surface using visual filter for the black color (all filters are SPI filters).
• the reflection density (the sum) in the table was expressed as the sum of the individual reflection densities.
• the ink absorption time of a recording paper was determined by dropping 0.0018 cm 3 of cyan ink (manufactured by Matsushita-Giken) at 20 ° C and 65% RH using 1 micron micro-injectors onto the surface of a paper and determining the absorption time of the ink .
• the ink absorption speeds of the recording papers Nos. 1 to 3 are less than 30 seconds; so they are very fast, and their reflection densities are superior.
• the comparative tests (recording papers Nos. 4, 5 and 8), which have a uniformity number of less than 1.10, have a much lower ink absorption rate
• the other comparative tests (recording papers Nos. 6, 7 and 9), which have a BET specific surface area of less than 200 m 2 / g, have inferior reflection densities.
• a silica slurry (Gasil HP-34, manufactured by Joseph Crossfield & Sons, Ltd.) was added to 20 wt. (as a solid content) of a 15% aqueous solution of polyvinyl alcohol (degree of saponification: 100%, PVA 117, manufactured by Kuraray Co., Ltd.) to prepare a coating composition.
• the coating composition obtained was applied to three higher-quality papers with different degrees of sizing in an amount of 6 to 8 g / m 2 to produce three recording papers.
• the test results of the recording papers and the base paper obtained are summarized in Table 2.
• Table 2 the recording papers coated with the silicon dioxide according to the invention (No. 11, 12 and 13), regardless of the type of base paper types, have a superior reflection density.
• the ink absorption rate depends on the degree of sizing of the base paper, and with a degree of sizing of more than 4 seconds (based on a basis weight of 60 g / m 2 ) the coating of silicon dioxide works insufficiently.

Landscapes

• Chemical & Material Sciences (AREA)
• Dispersion Chemistry (AREA)
• Ink Jet Recording Methods And Recording Media Thereof (AREA)
• Duplication Or Marking (AREA)
• Paper (AREA)

Applications Claiming Priority (2)

Publications (3)

Family

ID=13128474

Family Applications (1)

Country Status (4)

Cited By (12)

Families Citing this family (78)

Family Cites Families (7)

• 1983
  • 1983-04-07 JP JP58059968A patent/JPS59185690A/ja active Granted
• 1984
  • 1984-03-23 US US06/592,585 patent/US4478910A/en not_active Expired - Lifetime
  • 1984-04-06 EP EP84103846A patent/EP0121916B1/fr not_active Expired
  • 1984-04-06 DE DE8484103846T patent/DE3461942D1/de not_active Expired

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