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
  • B41M5/502—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
  • B41M5/502—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
• • 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

Definitions

• the invention relates to a recording material for the Ink jet recording process.
• EP 0 650 850 is a recording material known that from a polyolefin coated Base paper and a receiving layer.
• the Material enables the production of images with high Resolution, color density and high gloss, which in the Overall impression with conventional photographic images are comparable. Disadvantage of this plastic coated paper is the bad pick the ink liquid, due to the sealing Effect of the plastic, which is bad Drying behavior of the recording material leads.
• the Recording material is characterized by Ink runs and poor overall image properties out.
• JP 10-119424 uses a recording paper high gloss suggested a hydrophobic carrier and two porous layers containing silica contains, with the silica of the upper layer has smaller particles than the silica lower layer. Disadvantage of this Recording material is the long drying time.
• glossy ones Claimed recording materials in which the Receiving layer in a cast coating process (cast coating) against a heated mirror-like glass Cylinder surface is pressed, which the Recording material has a high-gloss surface receives.
• EP 0 450 540 B1 discloses an ink jet recording material with a lower pigment layer and an upper pigment layer arranged thereon. Both layers contain aluminum oxide as the main pigment, the aluminum oxide of the lower layer having a smaller specific surface area ( ⁇ 90 m 2 / g) than the aluminum oxide of the upper layer (90-170 m 2 / g).
• This recording material can be used to produce images with high color density and high color fastness (little color change after storage).
• the object of the invention is a shiny Recording material for ink jet recording processes to provide with which images of high color density can be produced and which has a high ink absorbency, a short Drying time and a good result Has smudge resistance.
• the task is solved by a recording material, which is a carrier, at least one barium sulfate containing sub-layer and one of at least two Top layer consisting of pigments contains.
• a Recording material which has a carrier, at least an underlayer containing barium sulfate and one Top layer containing alumina as pigment having.
• the lower layer contains at least one other pigment as the main pigment.
• An aluminum oxide and a silica or barium oxide are particularly suitable as a further pigment.
• the aluminum oxide is a so-called active aluminum oxide, which is obtained, for example, by calcining from aluminum hydroxide and has a specific surface area of approximately 160 to 240 m 2 / g and an average particle size of approximately 0.7 to 5 ⁇ m, in particular approximately 1 to 3 ⁇ m.
• precipitated silicas with a specific surface area of approximately 30 to 800 m 2 / g have proven to be particularly suitable.
• the particle size of the barium sulfate is about 0.2 to 2.0 ⁇ m, especially about 0.7 to 1.2 ⁇ m.
• the quantitative ratio of barium sulfate / aluminum oxide is approximately 4: 1 to 1: 1.
• the use of an aluminum oxide or Silicic acid in the lower layer causes an increase in Absorbency of this barite layer, so that the application weight of the upper class can be reduced can without the absorbency of the whole Affect recording paper.
• the application weight of the upper layer can be reduced arising during the drying of the layer and the Image quality impairing "cracking" effect be eliminated.
• the above mentioned leads Modification of the barite layer to eliminate the Dusting problems and for improvement liability to the carrier material.
• the binder used in the sub-layer mentioned can be from the group of hydrophilic colloidal and / or water-soluble binders can be selected as Polyvinyl alcohol, polyvinyl pyrrolidone, polyvinyl acetate, Gelatin, starch, starch derivatives, casein, Cellulose esters, alginates, polyethylene glycol, Polyacrylic acid or mixtures of these binders.
• gelatin particularly suitable as a binder in the The lower layer is gelatin. Any type of gelatin can be used for this be used. Proved to be particularly advantageous gelatin with a gel strength of 100 up to 300 bloom, in particular 100 to 200 bloom (measured according to BS 757, 1975).
• the pigment to binder ratio in the Underlayer is 1: 1 to 10: 1, especially 1: 1 to 8: 1.
• the auxiliary layer may contain further auxiliaries such as crosslinking agents, dispersing aids, plasticizers and optical brighteners.
• the application weight of the underlayer is 5 to 30 g / m 2 , in particular 10 to 25 g / m 2 .
• the pigment mixture contained in the top layer consists from at least two finely divided pigments, the Particle size must not exceed about 500 nm.
• a mixture of aluminum oxide is particularly preferred with a particle size of about 50 to 150 nm and Silica with a particle size of about 200 to 300nm.
• Silica with a particle size of about 200 to 300nm.
• a special embodiment of the invention is a mixture of a cationically modified Alumina and a cationically modified Silica used.
• the quantitative ratio Alumina to silica is about 4: 1 to 1: 1.
• the Upper layer of barium sulfate and / or barium oxide can contain up to 50% by weight amount, based on the dried layer.
• the binder used in the above top layer can be from the group of hydrophilic colloidal and / or water-soluble binders can be selected as Polyvinyl alcohol, polyvinyl pyrrolidone, polyvinyl acetate, Gelatin, starch, starch derivatives, casein, Cellulose esters, alginates, polyethylene glycol, Polyacrylic acid or mixtures of these binders.
• Particularly suitable as a binder in the top layer is polyvinyl alcohol, being a fully saponified High viscosity polyvinyl alcohol from 35 to 80 cP, in particular 50 to 75 cP (measured on 4% aqueous Solutions at 20 ° C) is preferred. But also partially saponified polyvinyl alcohols or cationic modified polyvinyl alcohols can be used.
• the pigment / binder ratio in the top layer is 20: 1 to 1: 1, especially 14: 1 to 6: 1.
• the top layer can also contain other auxiliaries, such as dye-fixing compounds, crosslinking agents, color pigments and optical brighteners.
• the dye-fixing agents include, for example, quaternary polyammonium salts, cationic polyamines, cationic polyacrylamides, cationic polyethyleneimines.
• the amount of auxiliaries can be up to 5% by weight, based on the dried layer.
• the application weight of the top layer is 10 to 25 g / m 2 , in particular 15 to 20 g / m 2 .
• a neutral or acid-sized uncoated or coated paper can preferably be used as the carrier material. Particularly well suited is paper coated on one side with synthetic resin on the back, with a basis weight of 50 to 300 g / m 2 .
• Polyolefins or polyester, for example, can be used as synthetic resin.
• the polyolefin used to coat the base paper is preferably low density polyethylene (LDPE) and / or high density polyethylene (HDPE).
• the application quantity of the synthetic resin coating which may additionally contain pigments and other substances, is at least 5 g / m 2 , in particular up to 20 g / m 2 .
• Layers on the carrier material can be any Commonly known application and dosing process are used like roller application, engraving or nipping processes and air brush or roller doctor metering.
• the front side of a base paper which was neutral-sized with alkyl ketene dimer and which had been surface-sized with starch and had a basis weight of 135 g / m 2 was coated with a barite-containing coating composition using a Meyer bar (Meyer Bar) and then dried.
• the application weight of the lower layer 1A obtained was 15 g / m 2 .
• a second coating composition was applied to the first layer (underlayer) using a slot die applicator and dried.
• the application weight of the top layer 1B obtained was 20 g / m 2 .
• the compositions of the layers are shown in Tables 1 and 2.
• a base paper according to Example 1 was provided with the following sub-layers and top layers: example Lower layer / order weight Upper class / order weight 2nd 2A 15 g / m 2 1B 15 g / m 2 3rd 3A 14 g / m 2 1B 20 g / m 2 4th 3A 15 g / m 2 5B 20 g / m 2 5 2A 15 g / m 2 3B 20 g / m 2 6 2A 15 g / m 2 4B 20 g / m 2 7 4A 20 g / m 2 1B 15 g / m 2 8th 4A 14 g / m 2 2 B 15 g / m 2 9 5A 15 g / m 2 1B 20 g / m 2
• a recording paper was produced in the same manner as in Example 3, except that a base paper coated on the back with a clear low density polyethylene (LDPE) was used as a support material.
• compositions of the upper and lower layers are shown in Tables 1 and 2.
• Lower layer / composition Quantity weight% 1A 2A 3A 4A 5A Barium sulfate, average Particle size: 0.7-1.2 ⁇ m, 72.0 45.0 69.2 43.3 69.2 Alumina, average Particle size: 1.45 ⁇ m, spec.
• a neutral-sized and surface-sized base paper with a basis weight of 160 g / m 2 was first provided with a standard barite layer in an application quantity of 20 g / m 2 and in the second step with an upper layer according to FIG. 1B in an application quantity of 30 g / m 2 coated.
• a neutral sized base paper with a basis weight of 160 g / m 2 was first coated with the lower layer 3A in an application amount of 15 g / m 2 and in the second step with the following top layer in an application amount of 20 g / m 2 :
• a base paper with a basis weight of 150 g / m 2 was coated with the following sub-layer in an application amount of 15 g / m 2 .
• the top layer was applied in an amount of 20 g / m 2 .
• Underlayer / Comparative Example 3 Barium sulfate, average Particle size: 0.7-1.2 ⁇ m, 69.1% by weight Calcium carbonate, average Particle size: 10 ⁇ m 17.30% by weight Gelatin, 140 ⁇ 20 bloom 13.30% by weight Chrome alum 0.20% by weight TAF / formaldehyde 0.10% by weight
• the recording papers were made using the Inkjet printer Epson 740 at 720 DPI (dots per inch) printed.
• the gloss was on unprinted material with the laboratory Reflectometer RL3 from Dr. Long according to DIN 67530 measured at a measuring angle of 60 °.
• the color density was determined using an X-Rite densitometer 428 on the colors cyan, magenta, yellow and black measured.
• the smudge resistance was achieved by rubbing the printed image checked with a white rag. This exam was made for each color carried out and graded individually. The grade 1 stands for very good smudge resistance (no paint residue recognizable by the rag) and the grade 5 stands for poor smudge resistance (significant paint residues on the Lobes recognizable).

Landscapes

• Ink Jet Recording Methods And Recording Media Thereof (AREA)
• Ink Jet (AREA)
• Paper (AREA)
• Materials For Medical Uses (AREA)

Priority Applications (10)

Applications Claiming Priority (1)

Publications (2)

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Family Applications (1)

Country Status (10)

Cited By (3)

Families Citing this family (28)

Citations (2)

Family Cites Families (16)

• 1999
  • 1999-04-30 DK DK99108448T patent/DK1048480T3/da active
  • 1999-04-30 AT AT99108448T patent/ATE288362T1/de not_active IP Right Cessation
  • 1999-04-30 ES ES99108448T patent/ES2236987T3/es not_active Expired - Lifetime
  • 1999-04-30 EP EP99108448A patent/EP1048480B1/fr not_active Expired - Lifetime
  • 1999-04-30 PT PT99108448T patent/PT1048480E/pt unknown
  • 1999-04-30 DE DE59911552T patent/DE59911552D1/de not_active Expired - Lifetime
• 2000
  • 2000-04-20 AU AU28911/00A patent/AU765905B2/en not_active Ceased
  • 2000-04-28 CN CNB001179497A patent/CN1145558C/zh not_active Expired - Fee Related
  • 2000-04-28 US US09/561,396 patent/US6502935B1/en not_active Expired - Lifetime
  • 2000-04-28 JP JP2000130432A patent/JP2001010222A/ja active Pending

Patent Citations (2)

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