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
• • 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 invention relates to a method for printing on non-porous surfaces of a Inkjet ink substrate.
• inkjet inks have been applied directly to materials or substrates with non-porous Printed surface.
• the inkjet inks can contain components that make up the Effect or improve adhesion on these surfaces.
• JP-A-078472 describes a transparent recording medium that has a printable transparent coating having.
• the transparent recording medium is transparent to light marked in the visible range of more than 80%.
• a method of generating waterproof markings on surfaces made of plastic materials are described in WO 99/18163. This uses an ink that is difficult to volatile Contains solvent, which is largely absorbed by the plastic material.
• DE-A-3721651 describes a method for printing plate-shaped information carriers proposed with a label information.
• EP-A-413442 describes an ink for marking plastic material, the Composition comprises an organic solvent. The solvent used leads to loosening or swelling of the plastic material to be printed.
• the invention was therefore based on the object, the method described above to further develop that non-porous surfaces of any substrates, in particular Plastics, metal, glass and ceramics and the like, printed with an inkjet ink can be, with short drying times, good adhesion and water resistance of the Ink can be achieved.
• high resolution should be sought.
• the adverse outflow of the ink on the non-porous surface of the substrate is said be largely excluded.
• the present invention solves this problem in that one with a paint coated non-porous surface with an InkJet ink that dissolves the paint Contains component, is printed.
• the essence of the invention is therefore the non-porous surface of the To provide the substrate with a layer of lacquer.
• the type of paint does not matter decisive role. Rather, it should be noted that between each selected lacquer and the inkjet ink used for printing Voting takes place when the ink is on the non-porous in the inkjet ink Surface of the substrate dissolving or swelling component is included. This is in generally the solvent of the InkJet ink as such.
• the InkJet ink contains an additional component that Solving or swelling of the paint coating caused. It can be, for example are alcohols, glycol ethers, esters, ketones or chlorinated hydrocarbons.
• lacquers are liquid or powdery solid substances that are applied to objects in a thin layer or by chemical reaction and / or physical change one on the Form objects adhering solid film, which has a decorative and / or protective function.
• the main components of the paint are binders, solvents, pigments, fillers and paint aids.
• binders In the case of non-opaque clear lacquer, the color of which is that of the binder depends on, the pigment is omitted, the solvent in the case of solid powdered lacquer.
• paints coating materials based on organic Binder To DIN 55 945 (December 1988) are paints coating materials based on organic Binder. Depending on the type of organic binder, paints can be organic Contain solvents and / or water or be free of them.
• color lacquers are also to be included under lacquers, which are characterized by so-called Lacquering occurs.
• the paint hardening plays a role here.
• the curing of in Lacquer applied in the liquid state to stable surface layers is called Called paint curing. Varnish curing can be done either by air drying (physical drying), oxidative crosslinking (humidity hardening) or - as with the hardening of plastic - by polymerization (unsaturated polyester / polystyrene), Polyaddition (polyisocyanate / polyhydroxy compounds or polyepoxide / polyamine) or by polycondensation (alkyd or acrylate resins with amine resins).
• Binders in paints are mainly refined natural products e.g. out Rosin and oils or cellulose nitrate (nitro varnishes) and fully synthetic Resins (synthetic resins) used.
• the classic natural resins such as Cupale, amber and shellac are now of little importance in terms of coating technology.
• Synthetic resins are used in particular phenolic resins, amine resins (e.g. benzoguanamine, Urea, melamine resins), alkyd resins, polyvinyl acetate, epoxy resins, polyurethane resins, Polyester resins, rosin-modified phenolic resins, chlorinated rubber, chlorinated polypropylene, cyclo rubber, ketone resins, acrylate resins.
• Solvent or Diluents in resins to be applied according to the invention are liquids in which you dissolve the binder to bring paints into a more applicable form. When the paint is dried, these solvents evaporate almost completely, whereby the lacquer as a cross-linked or non-cross-linked film glossy, matt or also remains silky matt.
• Particularly suitable solvents are ether alcohols, Aromatics, chlorinated hydrocarbons, esters, hydroaromatics, ketones, Terpene hydrocarbons, water and others in question. Generally several of these Solvent combined.
• the paints can be pigmented, i.e. with the usual solvents, insoluble organic or inorganic pigments e.g. Titanium dioxide, iron oxide red, iron oxide black, chrome oxide green, molybdate, Cadmium pigments, carbon blacks, azo, phthalocyanine, triarylmethane pigments, etc. (cf. Römpp Chemie-Lexikon, 9th ed., Vol. 3, 1990, pp. 2424/2425).
• insoluble organic or inorganic pigments e.g. Titanium dioxide, iron oxide red, iron oxide black, chrome oxide green, molybdate, Cadmium pigments, carbon blacks, azo, phthalocyanine, triarylmethane pigments, etc.
• the paint-coated substrate preferably has a light transmission in the visible range of less than about 80%, especially less than about 50%.
• the paint-coated substrate by a light transmission of characterized less than about 10%; in particular, it is opaque.
• acrylic resin paints in particular (cf. Römpp Chemie-Lexikon, 9th edition, vol. 1, 1989, p. 41) based on acrylic resins. you will be as solutions in organic solvents, as aqueous dispersions or as Powder coatings used in many ways.
• a particularly suitable and preferred for this Solvent is a glycol ether.
• the following description of the invention starts out of the use of a varnish in the form of an acrylic resin varnish or an acrylic varnish.
• the findings made there apply, as is readily apparent to the person skilled in the art, accordingly also for the other paint systems described above, provided that inventive idea of the coordination of paint with the dissolving or swelling component of the inkjet ink is considered.
• an acrylic varnish to use.
• This is as a solution in an organic solvent, as an aqueous Dispersion or applied as a powder coating and then dried or after melting let cool again. The order is made in particular by spraying or Brush until the non-porous surface to be printed is completely covered. It then drying takes place in any case, which on the one hand removes the solvent or dispersing agent, or drying at high temperature after melting the Powder coating with subsequent cooling.
• each layer of lacquer applied is for the purposes of the present Invention not essential.
• the paint layer on the non-porous Surface thickness of about 1 to about 500 microns, especially about 5 to 100 microns exhibit.
• an inkjet ink has proven to be particularly suitable that dissolves or swells, especially when using an acrylic varnish, which makes a good Fixation of the colorant on the substrate surface causes and a flow of the inkjet ink is prevented.
• the paint layer removes part of the solvent from the ink and thus reduces the drying time. The resolution achieved is significantly higher than when printing on the free substrate surface.
• the type of substrate does not matter essential role. Ultimately, the only thing that matters is that the paint is adequate Has adhesion to the substrate, which is generally the case. In particular it is around substrates made of glass, metal, ceramics, plastics or the like.
• Plastics are polystyrene (PS), polyvinyl chloride (PVC), acrylonitrile-butadiene-styrene copolymer (ABS) and polypropylene (PB) preferred.
• PS polystyrene
• PVC polyvinyl chloride
• ABS acrylonitrile-butadiene-styrene copolymer
• PB polypropylene
• Figure 1 shows a microscopic picture of the printed paint substrate. Man recognizes that the drops do not flow completely into each other, but each one Drop is still recognizable. The white areas in the middle of the ink drops are created in the drying process. Their emergence can be increased slightly Drying time can be prevented.
• Example 1 was repeated with the same inkjet ink, but an uncoated ABS (Acrylonitrile butadiene styrene) substrate printed. Although such a substrate is still Relatively well suited, since its surface is also slightly different from that contained in the InkJet ink When glycol ethers are dissolved, the drops run much more closely together. On Multi-color printing, in which adjacent drops must not flow together, is on not possible this way.
• ABS Acrylonitrile butadiene styrene

Landscapes

• Inks, Pencil-Leads, Or Crayons (AREA)
• Ink Jet Recording Methods And Recording Media Thereof (AREA)

Applications Claiming Priority (2)

Publications (3)

Family

ID=7920448

Family Applications (1)

Country Status (4)

Cited By (1)

Families Citing this family (2)

Family Cites Families (9)

• 1999
  • 1999-09-01 DE DE19941673A patent/DE19941673A1/de not_active Withdrawn
• 2000
  • 2000-08-10 DE DE50010036T patent/DE50010036D1/de not_active Expired - Lifetime
  • 2000-08-10 EP EP00116295A patent/EP1080933B1/fr not_active Expired - Lifetime
  • 2000-08-23 US US09/644,367 patent/US6412939B1/en not_active Expired - Fee Related
  • 2000-08-28 CA CA002316795A patent/CA2316795A1/fr not_active Abandoned

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