Classifications

• • C—CHEMISTRY; METALLURGY
  • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
  • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
  • C09D11/00—Inks
  • C09D11/50—Sympathetic, colour changing or similar inks
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
  • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
  • B41M3/00—Printing processes to produce particular kinds of printed work, e.g. patterns
  • B41M3/14—Security printing
  • B41M3/144—Security printing using fluorescent, luminescent or iridescent effects
• • C—CHEMISTRY; METALLURGY
  • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
  • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
  • C09D11/00—Inks
  • C09D11/02—Printing inks
• • C—CHEMISTRY; METALLURGY
  • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
  • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
  • C09D11/00—Inks
  • C09D11/02—Printing inks
  • C09D11/03—Printing inks characterised by features other than the chemical nature of the binder
• • C—CHEMISTRY; METALLURGY
  • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
  • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
  • C09D11/00—Inks
  • C09D11/02—Printing inks
  • C09D11/03—Printing inks characterised by features other than the chemical nature of the binder
  • C09D11/033—Printing inks characterised by features other than the chemical nature of the binder characterised by the solvent
• • C—CHEMISTRY; METALLURGY
  • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
  • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
  • C09D11/00—Inks
  • C09D11/30—Inkjet printing inks
  • C09D11/32—Inkjet printing inks characterised by colouring agents
  • C09D11/324—Inkjet printing inks characterised by colouring agents containing carbon black
  • C09D11/326—Inkjet printing inks characterised by colouring agents containing carbon black characterised by the pigment dispersant
• • C—CHEMISTRY; METALLURGY
  • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
  • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
  • C09D11/00—Inks
  • C09D11/30—Inkjet printing inks
  • C09D11/38—Inkjet printing inks characterised by non-macromolecular additives other than solvents, pigments or dyes

Definitions

• the present invention relates to a sensor ink for the quantitative detection of components in a closed package / container for flexographic printing or offset printing, comprising at least one fluorophore, a polymeric carrier matrix and at least one organic solvent and a method for producing a fluorescence sensor using the sensor ink and a sensor made in this way.
• Fluorescence or luminescence sensors which are used to measure gas concentrations in the interior of, for example, food packaging or pharmaceuticals, have been known for some time and are used in particular to determine whether, for example, the packaging is tight or whether the products contained in the packaging already spoiled and can no longer be used. Since at the same time the number of pre-packaged, especially gas-tight packed products that go on sale, steadily rising and, for example, in the food sector sausage, cheese or meat are almost exclusively already sold in packaged form, it is both for the manufacturer and for the Consumers of increasing importance to be able to immediately determine whether the packaged products are still edible, whether the packaging is tight or hygiene requirements are met.
• Such sensors which usually consist of luminescent or fluorescent dyes contained in a polymer matrix, have been applied to the inside of the film by means of special printing methods, such as screen printing or sputtering, whereby sensor dots or patterns are obtained on the inside of the package were.
• the sensors have a relatively large thickness of about 40 ⁇ and In addition to the excessively large consumption of polymer and fluorescent or luminescent dye also require a long time to dry, so that these sensors in a continuous process, especially in mass production, can hardly be used since the slowness of the manufacturing process and in particular the large or thick sensor points have proved to be disadvantageous.
• WO 98/18871 A1 discloses an ink for an ink-jet printing which, in addition to an organic solvent, a polymer soluble therein and an organic electrolyte soluble therein, also contains a plurality of fluorophores which can be used in an ink for ink-jet printing.
• US 4,126,020 A also discloses a fluorescent printing ink which is suitable for use in ink-jet printing and which emits in ultraviolet light and contains a soluble organic phosphorus, soluble organic brighteners and soluble fluorescent color components and a binder. An indication of the viscosity of this ink is not apparent from the document.
• the invention therefore aims to provide such a sensor ink which satisfies the above requirements and enables quantitative measurements, as well as a method for the production of a fluorescence sensor using such a sensor ink, and a sensor using such a sensor Sensor ink was formed.
• the sensor ink according to the invention is essentially characterized in that the carrier matrix used is a silicon-organic system or a homo- or co-polymer selected from the group consisting of polystyrenes, polysulfones, polyetherimides, polyols. ethersulfone, polyvinyl chloride (PVC), polyphenylene oxide (PPO), polysulfone derivatives, polyethylene terephthalate, biobased polymers such.
• the carrier matrix used is a silicon-organic system or a homo- or co-polymer selected from the group consisting of polystyrenes, polysulfones, polyetherimides, polyols. ethersulfone, polyvinyl chloride (PVC), polyphenylene oxide (PPO), polysulfone derivatives, polyethylene terephthalate, biobased polymers such.
• Polylactic acid, cellulose esters and cellulose ethers having a molecular weight between 80,000 and 300,000, preferably between 100,000 and 240,000, that the fluorophore is present in an amount of 1, 0 wt .-% to 7 wt .-% based on the polymer concentration and that forming the carrier matrix and the fluorophore with the organic solvent has a viscosity between 15 and 200 mPa 's, in particular 20 to 70 mPa's containing solution.
• a carrier material for the sensor ink selected a silicon-organic system or a homo- or copolymer selected from the group Polystyrenes, polysulfones, polyetherimides, polyethersulfones, polyvinylchloride (PVC), polyphenylene oxide (PPO), polysulfone derivatives, polyolefins, polyethylene terephthalate, biobased polymers, polylactic acid, cellulose esters and cellulose ethers having a molecular weight between 80,000 and 300,000, preferably between 100,000 and 240,000, manages to create a basis for the out of the Sens Ortintten trained sensor to provide, which is deformable after application to, for example, a plastic film and even with excessive movement of the film, for example, a packaging material on which such a sensor point is applied, does not break or detach from the packaging material.
• a carrier material for the sensor ink selected a silicon-organic system or a homo- or copolymer selected from the group Poly
• a formed from this polymer or copolymer sensor is flexible, elastic and adheres well to a variety of plastic surfaces. However, the sensor can also be used on non-deformable or slightly deformable, transparent or semitransparent materials such.
• B. glass containers or relatively rigid plastic containers are used.
• the polymer concentration is essentially chosen such that a fluorescence signal picked up by a detector is greater by at least a factor of 5 than that
• the viscosity of the sensor ink set to a value between 1 5 and 200 mPa 's is an organic solvent in addition to the carrier matrix and the fluorophore, it is possible to produce a good printable ink which is used in particular in mass printing method, in which it is necessary that the used inks are thin and dry especially after application extremely quickly, the solvent must be chosen so that it dries residue and sensors with extremely small layer thickness of a few ⁇ such as 1 - 10 ⁇ allows ,
• sensor ink as used in the present application includes any solution consisting of a polymer, a fluorophore and a low boiling solvent, regardless of the fact whether this solution is a colored or non-colored solution.
• the only criterion is that the fluorophore molecules contained in this sensor ink can be excited to emit a fluorescent or luminescent light and are present in molecular solution in the sensor ink.
• the sensor ink is formed so that the fluorophore contained therein is selected from the group metal porphyrins, Phenanthrolinkomplexe, such as diphenylphenantroline, ruthenium (II) complexes, fluorescein derivatives, coumarin Derivatives and phenylmethane dyes.
• the fluorophore contained therein is selected from the group metal porphyrins, Phenanthrolinkomplexe, such as diphenylphenantroline, ruthenium (II) complexes, fluorescein derivatives, coumarin Derivatives and phenylmethane dyes.
• the fluorophore is selected from the abovementioned group or from derivatives of this group, in particular various derivatives of the metalloporphyrins, makes it possible to obtain a To provide sensor ink in which also large concentrations of about 3 to 7% of the fluorophore in dissolved form in the polymer matrix and which fluorophore in particular is not prone to form aggregates or tends to produce a sensor for self-extinction.
• organic solvents selected from the group consisting of methyl ethyl ketone, chloroform, ethyl acetate or fluorinated organic compounds, e.g. Octofluorotoluene, which is selected in such a way as to be able to dissolve the respective matrix polymer, makes it possible to produce a sensor ink in which the viscosity can be produced exactly to that for a mass printing process, such as flexographic printing or offset printing.
• such solvents are chosen so that it has a boiling point of below 100 ° C, so that a separate drying process for the sensor after its application to the carrier film is not required, but the sensor already inside the printing unit / the printing press in the Drying section provided for this purpose is completely dried, ie the solvent evaporates.
• organic solvents ensure that they leave a homogeneous surface as they evaporate and evaporate uniformly, thereby providing a homogeneous sensor in which the fluorophore molecules, even in the dried form, exist as discrete molecules which are sufficiently spaced from each other to use the Sensors not to tend to a self-extinction but give a strong reproducible signal is achievable.
• the sensor ink according to the present invention is essentially further developed such that the fluorophore is present in the polymer solution molecularly dissolved.
• a molecular solution can be achieved only by an exact interaction of the selected polymer or homo- or copolymer and the chosen solvent and in particular the polymer and the solvent must be chosen so that not only in solution of the fluorophore is present molecularly dissolved and the Fluorophormoleküle spaced apart, but also after drying a sensor point on the carrier film.
• the sensor ink is printed in such a way that its elasticity is expressed in a visco-elastic system, expressed as G 'at frequencies .50 Hz less than the magnitude of the viscosity value
• G 'at frequencies .50 Hz the surface properties of the films on which such sensors are printed
• the surface properties of the films on which such sensors are printed can be improved, for example, by a corona treatment.
• Such a sensor ink is suitable for the production of fluorescence sensors by means of mass-printing methods, wherein according to the invention a method for producing such a fluorescence sensor is essentially characterized in that it comprises the following steps:
• Sensor ink on the slide succeeds, but in particular allows that due the specific composition of the sensor ink, the solvent contained in the ink is evaporated or evaporated in the drying section of the printing unit and at extremely high printing speeds, a sensor or a plurality of very small thickness sensors can be formed, which are immediately available for further use stand.
• the method is developed such that the evaporation of the solvent in the interior of the printer at a temperature in the printer ⁇ 90 ° C is performed.
• the evaporation temperature below 90 ° C., it is ensured that the abovementioned abovementioned solvents, namely methyl ethyl ketone, ethyl acetate, chloroform or fluorinated organic compounds, are readily evaporated off without residues remaining and without the sensor formed having irregularities, in particular surface roughness or an agglomeration of the fluorophore contained in the sensor takes place.
• Such an ink can be used in particular in a flexographic printing or offset printing process for printing the ink on a plastic film or a plastic or glass container.
• a mass printing method could be carried out, since otherwise the individual sides of the film or If the rotations of a roll or the occasional plastic or glass containers stick together, the sensors would be destroyed or torn off.
• films selected from the group of polysulfones (PS), polypropylene (PP), polyethylene (PE), polyamide (PA), Polyethylene terephthalate incl.
• BioPolymere such as polylactic acid (PLA), polyethylene terephthalate (BioPET), cellophane proved.
• Such films are sufficiently flexible to be printed, have sufficient temperature stability so as not to be degraded during printing, and can be heat-sealed to form For example, produce food packaging or medical device packaging.
• the plastic film is selected so that they have a has high oxygen barrier effect.
• films can be used which have an oxygen permeability of less than 10 cm 3 / m 2 / day / atm.
• the invention relates to a sensor, in particular a fluorescence sensor, which is produced by means of a method of the present invention and has been formed inside a package or a vessel which can be sealed by means of a plastic film.
• a sensor is essentially characterized in that the fluorophore is present in the polymer matrix as a discrete dye molecule in an amount of 2 to 5 wt .-% of the polymer matrix and has a thickness of less than 6. Sensors with such small thicknesses could not be made by the conventional printing methods such as screen printing, in particular, it was not possible to concurrently provide a sufficient concentration of the fluorophore in the sensor material and to form an extremely thin sensor.
• a printing solution according to the invention prepared by the process of the invention comprises 16-20% by weight of polymer and 80-85% by weight of the solvent. With such a pressure solution sensors with thicknesses between 1, 5 and 5 ⁇ , preferably 2 to 3 ⁇ can be obtained.

Landscapes

• Chemical & Material Sciences (AREA)
• Life Sciences & Earth Sciences (AREA)
• Engineering & Computer Science (AREA)
• Materials Engineering (AREA)
• Wood Science & Technology (AREA)
• Organic Chemistry (AREA)
• Chemical Kinetics & Catalysis (AREA)
• General Chemical & Material Sciences (AREA)
• Inks, Pencil-Leads, Or Crayons (AREA)
• Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
• Investigating Or Analysing Materials By The Use Of Chemical Reactions (AREA)
• Ink Jet (AREA)

Priority Applications (4)

Applications Claiming Priority (2)

Publications (1)

Family

ID=64267756

Family Applications (1)

Country Status (6)

Cited By (3)

Citations (1)

Family Cites Families (12)

• 2017
  • 2017-10-30 AT ATA422/2017A patent/AT520591B1/de active
• 2018
  • 2018-10-25 CA CA3081101A patent/CA3081101A1/en active Pending
  • 2018-10-25 WO PCT/AT2018/000088 patent/WO2019084582A1/de not_active Ceased
  • 2018-10-25 JP JP2020543653A patent/JP2021501256A/ja active Pending
  • 2018-10-25 US US16/760,051 patent/US20200347255A1/en not_active Abandoned
  • 2018-10-25 EP EP18450009.8A patent/EP3476908A1/de not_active Withdrawn

Patent Citations (1)

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