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
  • 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
  • B41M5/502—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
• • 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

• polymeric substrates are becoming more important in the manufacture of ink-jet recording elements for ink-jet printing (e.g. resin coated paper, polyesterfilm, etc).
• ink-jet recording elements on a polymeric substrate for ink-jet printing is the production of transparencies. These elements are primarily intended for use on an overhead projector. More generally, these elements can be used for all kinds of viewing means by transmitted light.
• Another application for ink-jet recording elements on a polymeric substrate for ink jet printing involves opaque media intended for direct viewing by the eye, operating according to the principles of reflected light.
• Such polymeric image recording elements can easily be created by applying liquid ink dots to the ink-receiving layer using equipment such as ink jet printers.
• the individual ink droplets can be applied to the receiving substrate in several different ways.
• the ink solution can be jetted continuously through a small nozzle towards the receiving layer, said droplets only being selected for areas where a certain image density is required (Hertz method).
• Hertz method By combining different droplets into a single pixel cell gray scale printing can be provided by this method of continuous ink jet printing.
• the ink droplet can also be created "upon demand" by a piezoelectric transducer or a thermal push (Bubble Jet), these latter processes being much cheaper than the continuous one and especially suited for low end applications on transparent and opaque polymeric media.
• the ink receiving layers of the prior art have been prepared for a long time using many different materials.
• a dimensionally stable substrate such as polyethyleneterephtalate (PET), cellulosetriacetate, or paper is used most frequently and coated with one or more polymer coatings.
• PET polyethyleneterephtalate
• These receiving polymer coatings comprise one or more binders and different additives which are helpfull to meet the requirements mentioned above.
• US P 4,503,111 describes an image receiving layer where a first binder (gelatin or polyvinylalcohol (PVA)) is mixed with a polyvinylpyrrolidone (PVP) having a molecular weight of at least 90000, and for which the ratio PVA/PVP is in the range 3:1 to 1:3.
• PVA polyvinylalcohol
• PVP polyvinylpyrrolidone
• This mixture of PVA, PVP or copolymers can also be combined with a coalesced latex of co-PVA-Polyvinyl-benzylammoniumchloride (US P 4,547,405) yielding a further improvement in waterfastness.
• a paper support is coated with a layer comprising PVP or a copolymer of vinylacetate and vinylpyrrolidone and a white filler, said filler being selected from the group consisting of calciumcarbonate, clay, talc, calciumsulfate, diatomaceous earth, aluminiumhydroxide, titaniumdioxide, silica, aluminiumsilicate, satin white, zinc-oxide, and the ratio of said filler versus said binder being in the range 10:1 to 0.2:1.
• the outer layer comprises a silicon containing type pigment, said pigment being a synthetic silica (Syloid 620), and said paper showing minimum powder drop-off.
• an ink jet receiving member comprising a substrate, a first pigmented layer and a second pigmented layer, said first pigmented layer comprising aluminiumoxide, said second pigmented layer comprising an aluminiumoxide with lower specific area as said aluminiumoxide used in said first pigmented layer.
• said second pigmented layer comprises magnesiumsilicate.
• basic magnesiumcarbonate, ⁇ -alumina or alumina less indoor discoloration is found if compared with the use of synthetic silica as pigment particle.
• both basic magnesiumcarbonate and a magnesium salt of silicic acid are used in an ink jet receiving member showing improvement in haze, feathering and indoor discoloration.
• the tuning of the surface energy and polarity of the receiving layer is done by the use of special (fluoro) tensides: e.g. US P 4,578,285, US P 4,781,985 and US P 5,045,864.
• the drying time characteristic can also be improved by a better tuning of the pH value of the coating solution, as described in EP 594896.
• an ink-receiving layer comprising a hydrophilic polymer with up to 50% by weight of vinylpyridine/vinylbenzylquaternary ammonium salt copolymers is claimed.
• the quaternary ammonium derivatives are used in combination with calciumacetate, a binder, a suitable crosslinker for the binder, and an ink composition comprising a binder and a crosslinkable dye.
• EP-A 609930 polymeric mordanting compounds comprising a phosphonium moiety have been described for use in ink jet receiving layers.
• an ink-jet recording element comprising a polymeric film substrate or a resin coated paper substrate and an ink-receiving layer coated thereon characterized in that said ink-receiving layer comprises a synthetic clay.
• Natural clays are essentially hydrous aluminum silicates, wherein alkali metals or alkaline-earth metals are present as principal constituents. Also in some clay minerals magnesium or iron or both replace the aluminum wholly or in part. The ultimate chemical constituents of the clay minerals vary not only in amounts, but also in the way in which they are combined or are present in various clay minerals.
• Smectite clays From the natural clays, smectite clays, hectorites and bentonites are well-known. For the said smectite clays some substitutions in both octahedral and tetrahedral layers of the crystal lattice occur, resulting in a small number of interlayer cations. Smectite clays form a group of "swelling" clays which take up water and organic liquids between the composite layers and which have marked cation exchange capacities.
• synthetic clays are the preferred clays for use as single binder or as an additive to the binder(s) in an ink-jet recording element used for the ink-jet printing technique.
• synthetic layered silicates are preferred to be used in ink-receiving layers according to the present invention.
• Ink-receiving layers according to the present invention can comprise synthetic clays as sole binder material.
• the ink-receiving layers in the novel ink-jet recording elements contain said synthetic clay(s) combined with at least one compatible binder which may be selected from the group consisting of:
• the binder used in combination with synthetic clays in ink receiving layers according to the present invention may also be :
• Preferred binary blends of binders for use in combination with synthetic clays in ink-receiving layers according to this invention are :
• Preferred ternary blends of binder materials use in combination with synthetic clays in ink receiving layers according to this invention are :
• Preferred binders are gelatin, vinylpyrrolidone and polyvinylalcohol or binary or ternary blends of these.
• Gelatin is thus a particularly preferred material for use in forming the ink-receiving layer of materials according to this invention.
• reasons is the fact that it forms a clear coating, is readily cross-linked in an easily controllable manner, and is highly absorptive of water-based liquid inks to thereby provide rapid-drying characteristics.
• synthetic clays When the synthetic clays are blended with other binders as described above, it is preferred that said synthetic clays are present in an amount between 10 and 80 % by weight with respect to the total weight of the binder(s) used in ink-receiving layers according to the present invention. Within said range it is most preferred to use synthetic clays in an amount of 15 to 35 % by weight or in an amount of 50 to 70 % by weight.
• Hardening agents can be used individually or in combination and in free or in blocked form.
• a great many hardeners, useful for the present invention are known, including formaldehyde and free dialdehydes, such as succinaldehyde and glutaraldehyde, blocked dialdehydes, active esters, sulfonate esters, active halogen compounds, s-triazines and diazines, epoxides, active olefins having two or more active bonds, active olefins, carbodiimides, isoxazolium salts unsubsituted in the 3-position, esters of 2-alkoxy-N-carboxy-dihydroquinoline, N-carbamoyl and N-carbamoylpyridinium salts, hardeners of mixed function, such as halogen-substituted aldehyde acids (e.g. mucochloric and mucobromic acids), onium substituted acrole
• the ink-receiving layer in the novel image-recording elements according to this invention may also comprise other particulate material, which may consist either of primary particles comprising single particles or of porous particles comprising secondary particles formed from aggregation of the primary particles.
• particulate materials particularly preferrable are porous particles having an average particle size of 1-30 ⁇ m, preferably 3-10 ⁇ m which can be formed by aggregation of smaller particles, having a size of 0.01 to 2 ⁇ m, preferably 0.1 to 0.5 ⁇ m. These porous particles formed by secondary or tertiary aggregation will not easily disintegrate.
• the porous material is preferably made of at least one of the organic materials such as polystyrene, polymethacrylate, polymethylmethacrylate, elastomers, ethylene-vinyl acetate copolymers, polyesters, polyester-copolymers, polyacrylates polyvinylethers, polyamides, polyolefines, polysilicones, guanamine resins, polytetrafluoroethylenes, elastomeric styrene-butadiene rubber (SBR), elastomeric butadiene-acrylonitrile rubber (NBR), urea resins, urea-formalin resins, etc., or inorganic materials such as talc, koalin, diatomaceous earth, calcium carbonate, magnesium carbonate, aluminium hydroxide, aluminium oxide, titanium oxide, zinc oxide, barium sulfate, calcium sulfate, zinc sulfide, satin white, etc.
• Polymethylmethacrylate beads may be added as matting agents. They are usually added to the receiving layer in a range of 0.4 to 1.2 g/m 2 and preferably in a range of 0.40 to 0.90 g/m 2 with 0.50 g/m 2 being most preferred.
• the ink-receiving layer of the invention may contain a whitening agent.
• TiO 2 rutile or anatase
• Amounts of whitener present in the film element can range from 0.1 to 3.0 g/m 2 , and preferably from 0.2 to 1.5 g/m 2 , and most preferably 0.7 g/m 2 .
• a slurry of the whitener may be added by batchwise addition or by in-line injection just prior to coating the receptor layer(s) on the support.
• the ink-receiving layer of the present invention can also comprise a plasticizer such as ethylene glycol, dietylene glycol, propylene glycol, polyethylene glycol, glycerol monomethylether, glycerol monochlorohydrin, ethylene carbonate, propylene carbonate, tetrachlorophthalic anhydride, tetrabromophthalicanhydride urea phosphate, triphenylphosphate, glycerolmonostearate propylene glycol monostearate, tetramethylene sulfone, n-methyl-2-pyrrolidone, n-vinyl-2-pyrrolidone, and polymer latices with low Tg-value such as polyethylacrylate, polymethylacrylate, etc.
• a plasticizer such as ethylene glycol, dietylene glycol, propylene glycol, polyethylene glycol, glycerol monomethylether, glycerol monochlorohydrin,
• Surfactants may be incorporated in the ink-receiving layer of the present invention. They can be any of the cationic, anionic, amphoteric, and nonionic ones as described in JP-62-280068 (1987).
• the surfactants are soap, N-alkylamino acid salts, alkylether carboxylic acid salts, acylated peptides, alkylsulfonic acid salts, alkylbenzene and alkylnaphthalene sulfonic acid salts, sulfosuccinic acid salts, ⁇ -olefin sulfonic acid salts, N-acylsulfonic acid salts, sulfonated oils, alkylsulfonic acid salts, alkylether sulfonic acid salts, alkylallylethersulfonic acid salts, alkylamidesulfonic acid salts, alkylphosphoric acid salts, alkyletherphosphoric acid salts, alkylally
• These surfactants are commercially available from DuPont and 3M.
• the concentration of the surfactant component in the ink-receiving layer is typically in the range of 0.1 to 2 percent, preferably in the range of 0.4 to 1.5 percent and is most preferably 0.75 percent by weight based on the total dry weight of the layer.
• Ink-receiving layers according to the present invention may also comprises mordanting agents.
• Said mordanting agents can be quarternary ammonium mordanting agenst as disclosed in, e.g., US P 4,371,582, US P 4,575,465, US P 4,649,064, GB 2,210,071 and EP 423 829.
• Said mordanting agent can also be phosphonium mordanting agents as disclosed in, e.g., EP-A 609 930.
• the ink-receiving layers of the present invention may additionally comprise different additives which are well known in the art, and include UV-filters and antistatic agents.
• the ink-jet recording elements of this invention comprise a polymeric support for the ink-receiving layer.
• supports include, for example, transparent supports as those used in the manufacture of photographic films including cellulose acetate propionate or cellulose acetate butyrate, polyesters such as poly(ethyleneterephthalate) and poly(ethylenenaphthalate), polyamides, polycarbonates, polyimides, polyolefins, poly(vinylacetals), polyethers and polysulfonamides.
• Other examples of useful high-quality polymeric supports for the present invention include opaque white polyesters and extrusion blends of poly(ethylenenterephthalate) and polypropylene.
• Polyester film supports and especially poly(ethyleneterephthalate) are preferred because of their excellent properties of dimensional stability.
• a subbing layer must be employed to improve the bonding of the ink-receiving layer to the support.
• Useful subbing layers for this purpose are well known in the photographic art and include, for example, polymers of vinylidene chloride such as vinylidene chloride/acrylonitrile/acrylic acid terpolymers or vinylidene chloride/methyl acrylate/itaconic acid terpolymers.
• the ink-jet recording elements of this invention are employed in printing processes where liquid ink dots are applied to the ink-receiving layer of the element.
• the method comprises the steps of :
• the inks preferably used to image the image-recording elements of this invention are typically liquid compositions comprising a solvent or carrier liquid, dyes or pigments, humectants, organic solvents, detergents, thickeners, preservatives, etc.
• the solvent or carrier liquid is predominantly water, although ink in which organic materials such as polyhydric alcohols are used as carrier liquid, can also be used.
• the dyes used in such ink-jet ink compositions are typically water-soluble direct dyes or acid type dyes.
• Such liquid ink compositions have been extensively described in the prior art (US P 4,381,946, US P 4,781,758, US P 4,994,110).
• a recording medium with an ink-receiving transparent layer was prepared as described in example 1, except for the fact that no synthetic clay was added to the coating solution.
• a recording medium with an ink-receiving transparent layer was prepared as described in example 1, except for the fact that in stead of 10.5 parts LAPONITE JS, 10 parts of LAPONITE RDS, tradename for a synthetic layered sodium lithium magnesium silicate and commercially available through the Laporte Company UK was used.
• a recording medium with an ink-receiving transparent layer was prepared as described in example 1, except for the fact that no synthetic clay was added to the coating solution, but as particulate material 20 parts of Silicagel (KIESELSOL 300F, a tradename of Bayer AG, Leverkusen Germany for a dispersion of SiO 2 with a specific surface of 280 to 300 m 2 /g) were used.
• Silicagel KIESELSOL 300F, a tradename of Bayer AG, Leverkusen Germany for a dispersion of SiO 2 with a specific surface of 280 to 300 m 2 /g
• a recording medium with an ink-receiving layer was prepared as described in example 1, except for the fact that 15 parts of LAPONITE RDS, tradename for a synthetic layered sodium lithium magnesium silicate and commercially available through the Laporte Company UK was used, and that as substrate material a polypropylene-voided polyester as described in EP-A 582 750 was used.
• a recording medium with an ink-receiving layer was prepared as described in comparative example 1 was prepared, except for the fact that as substrate material a polypropylene-voided polyester as described in example 3 was used.
• the recording media were first acclimatised for at least 2 hours at 25°C and 30%RH, and then a test image was jetted upon it.
• a Hewlett-Packard DeskJet 500C was used for the ink application.
• examples 1 to 3 present better qualities than the ink-receiving layers according to the prior art (comparative examples 1 to 3).

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• Chemical & Material Sciences (AREA)
• Inorganic Chemistry (AREA)
• Ink Jet Recording Methods And Recording Media Thereof (AREA)

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Cited By (9)

Citations (3)

• 1995
  • 1995-03-16 EP EP95200629A patent/EP0732218A1/de not_active Withdrawn

Patent Citations (3)

Non-Patent Citations (1)

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