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WO2025078829A1 - Encre d'impression - Google Patents

Encre d'impression Download PDF

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Publication number
WO2025078829A1
WO2025078829A1 PCT/GB2024/052609 GB2024052609W WO2025078829A1 WO 2025078829 A1 WO2025078829 A1 WO 2025078829A1 GB 2024052609 W GB2024052609 W GB 2024052609W WO 2025078829 A1 WO2025078829 A1 WO 2025078829A1
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WO
WIPO (PCT)
Prior art keywords
ink
monomer
acrylate
inkjet
meth
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/GB2024/052609
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English (en)
Inventor
Andrew Phillips
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujifilm Speciality Ink Systems Ltd
Original Assignee
Fujifilm Speciality Ink Systems Ltd
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Filing date
Publication date
Application filed by Fujifilm Speciality Ink Systems Ltd filed Critical Fujifilm Speciality Ink Systems Ltd
Publication of WO2025078829A1 publication Critical patent/WO2025078829A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • C09D11/02—Printing inks
    • C09D11/10—Printing inks based on artificial resins
    • C09D11/101—Inks specially adapted for printing processes involving curing by wave energy or particle radiation, e.g. with UV-curing following the printing
    • 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
    • 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
    • C09D11/322—Pigment inks

Definitions

  • the present invention relates to a printing ink, and in particular to an inkjet ink which has a desirable balance of properties.
  • minute droplets of black, white or coloured ink are ejected in a controlled manner from one or more reservoirs or printing heads through narrow nozzles on to a substrate which is moving relative to the reservoirs.
  • the ejected ink forms an image on the substrate.
  • the inks For high-speed printing, the inks must flow rapidly from the printing heads, and, to ensure that this happens, they must have in use a low viscosity, typically 200 mPas or less at 25°C, although in most applications the viscosity should be 50 mPas or less, and often 25 mPas or less.
  • the ink when ejected through the nozzles, the ink has a viscosity of less than 25 mPas, preferably 5-15 mPas and most preferably between 7-11 mPas at the jetting temperature which is often elevated to, but not limited to 40-50°C (the ink might have a much higher viscosity at ambient temperature).
  • LEDs offer a number of advantages as the source of radiation, when compared to, for example, mercury discharge lamps (the most common UV light source used to cure inkjet inks).
  • LEDs offer significant cost reduction, longer maintenance intervals, higher energy efficiency and are an environmentally friendlier solution.
  • LEDs have a longer lifetime and exhibit no change in the power/wavelength output over time. LEDs also have the advantage of switching on instantaneously with no thermal stabilisation time and their use results in minimal heating of the substrate.
  • Cyan and magenta inks are particularly challenging. In this regard, it is often difficult to achieve an acceptable cure for UV cyan inks, and a higher pigment loading is often needed for magenta inks, which leads to reduced latitude for formulating magenta inks.
  • the present invention provides an inkjet ink comprising: a cyclic monofunctional (meth)acrylate monomer; an N-vinyl amide monomer and/or an N-(meth)acryloyl amine monomer; a cyan pigment or a magenta pigment; and an oligomer having the following formula:
  • monomers may possess different degrees of functionality, which include mono, di, tri and higher functionality monomers.
  • mono and difunctional are intended to have their standard meanings, i.e. one or two groups, respectively, which take part in the polymerisation reaction on curing.
  • Multifunctional (which does not include difunctional) is intended to have its standard meaning, i.e. three or more groups, respectively, which take part in the polymerisation reaction on curing.
  • groups that are capable of polymerising upon exposure to radiation include a (meth)acrylate group and a vinyl ether group.
  • (Meth)acrylate monomers are well known in the art and are preferably the esters of acrylic acid. A detailed description is therefore not required.
  • (meth)acrylate is intended herein to have its standard meaning, i.e. acrylate and/or methacrylate.
  • the ink preferably comprises 10 to 60% by weight, preferably 25 to 50% by weight, of PEA, IBOA, Medol-10 or a combination thereof, based on the total weight of the ink.
  • the inkjet ink comprises an N-vinyl amide monomer, preferably NVC.
  • the inkjet ink comprises 5 to 35% by weight, more preferably 10 to 30% by weight and most preferably 15 to 25% by weight of an N-vinyl amide monomer, based on the total weight of the ink. More preferably, the inkjet ink comprises 5 to 35% by weight, more preferably 10 to 30% by weight and most preferably 15 to 25% by weight of NVC, based on the total weight of the ink.
  • a cyan or magenta inkjet ink having the specific blend of components and an oligomer having the following formula: has improved cure speed, through cure and surface cure, whilst maintaining a jettable viscosity and required flexibility of the cured film, when compared to a cyan or magenta ink including an oligomer having the following formula:
  • the ink comprises 0.5 to 5% by weight of the oligomer having the following formula: based on the total weight of the ink.
  • the oligomer used in the ink of the present invention is commercially available as Ebecryl 81 from
  • the inkjet ink of the present invention may further comprise additional radiation-curable oligomer, other than the oligomer having the formula: Any additional radiation-curable oligomer that is compatible with the other ink components is suitable for use in the ink.
  • the inkjet ink comprises an additional (meth)acrylate oligomer, other than
  • radiation-curable oligomer means a component formed from a monomer having two or more radiation-curable groups of the same functionality, wherein at least one of the radiation- curable groups has been reacted with another component to increase the molecular weight thereby forming the oligomer, and at least one of the radiation-curable groups is capable of polymerisation.
  • the two or more radiation-curable groups are (meth)acrylate groups
  • the oligomer comprises reacted and unreacted (meth)acrylate groups.
  • the reacted (meth)acrylate group may result from the reaction between a (meth)acrylate group and an amine.
  • Radiation-curable oligomers comprise a backbone and one or more radiation-curable groups.
  • the backbone may comprise polyester, urethane, epoxy, polyether or amine functionality.
  • Oligomers are typically added to inkjet inks to increase the viscosity of the inkjet ink or to provide film-forming properties such as hardness or cure speed. They therefore preferably have a viscosity of 150 mPas or above at 25°C. Preferred additional oligomers for inclusion in the ink of the invention have a viscosity of 0.5 to 10 Pas at 50°C. Oligomer viscosities can be measured using an ARG2 rheometer manufactured by T.A. Instruments, which uses a 40 mm oblique I 2° steel cone at 60°C with a shear rate of 25 s 1 .
  • the polymerisable group of the additional oligomer can be any group that is capable of polymerising upon exposure to radiation.
  • the additional oligomers are (meth)acrylate oligomers.
  • the additional oligomer may include amine functionality, as the amine acts as an activator without the drawback of migration associated with low-molecular weight amines. Amines improve reactivity and help mitigate oxygen inhibition. Including amine modification in the oligomer adds to the functionality of the oligomer without requiring amines as a separate component. This enables greater formulation latitude for optimised photoinitiators, additional radiation-curable material and/ or other components. Therefore, when present, the additional radiation-curable oligomer is preferably amine-modified.
  • the additional radiation- curable oligomer is an amine-modified (meth)acrylate oligomer (in that an amine has reacted with a (meth)acrylate group), other than the oligomer having the formula:
  • additional radiation-curable oligomers include epoxy based materials such as bisphenol A epoxy acrylates and epoxy novolac acrylates, which have fast cure speeds and provide cured films with good solvent resistance.
  • the amount of radiation-curable oligomer in total is 0.5 to 10% by weight, preferably 0.5 to 5% by weight, based on the total weight of the ink.
  • no additional radiation-curable oligomer is present in the ink.
  • the inkjet ink comprises less than 2% by weight, more preferably less than 1% by weight and most preferably is substantially free of radiation-curable oligomer, other than the oligomer having the formula where the amounts are based on the total weight of the ink.
  • substantially free is meant that only small amounts will be present, for example as impurities in the radiation-curable materials present.
  • no radiation-curable oligomer, other than is intentionally added to the ink.
  • minor amounts of oligomer, other than are intentionally added to the ink.
  • the functional group of the difunctional monomer may be the same or different but must take part in the polymerisation reaction on curing.
  • Examples of such functional groups include any groups that are capable of polymerising upon exposure to radiation and are preferably selected from a (meth)acrylate group and a vinyl ether group.
  • the substituents of the difunctional monomer are not limited other than by the constraints imposed by the use in an ink-jet ink, such as viscosity, stability, toxicity etc.
  • the substituents are typically alkyl, cycloalkyl, aryl and combinations thereof, any of which may be interrupted by heteroatoms.
  • Non-limiting examples of substituents commonly used in the art include C1-18 alkyl, C3-18 cycloalkyl, CB- aryl and combinations thereof, such as Cs- aryl- or C3-18 cycloalkylsubstituted C1-18 alkyl, any of which may be interrupted by 1-10 heteroatoms, such as oxygen or nitrogen, with nitrogen further substituted by any of the above-described substituents.
  • the substituents may together also form a cyclic structure.
  • the inkjet ink comprises 0.5 to 20% by weight, more preferably 5 to 15% by weight of difunctional monomer, based on the total weight of the ink.
  • the inkjet ink comprises 1 ,10-decanediol diacrylate (DDDA).
  • DDDA ,10-decanediol diacrylate
  • the inkjet ink comprises 0.5 to 20% by weight, more preferably 5 to 15% by weight of DDDA, based on the total weight of the ink.
  • the ink comprises 10% or less of difunctional monomers, other than difunctional (meth)acrylate monomers. In one embodiment, no further difunctional monomers, other than difunctional (meth)acrylate monomers, are present in the ink.
  • the functional group of the multifunctional radiation-curable monomer, which is utilised in the ink of the present invention may be the same or different but must take part in the polymerisation reaction on curing.
  • Examples of such functional groups include any groups that are capable of polymerising upon exposure to radiation and are preferably selected from a (meth)acrylate group and a vinyl ether group.
  • the substituents of the multifunctional radiation-curable monomer are not limited other than by the constraints imposed by the use in an ink-jet ink, such as viscosity, stability, toxicity etc.
  • the substituents are typically alkyl, cycloalkyl, aryl and combinations thereof, any of which may be interrupted by heteroatoms.
  • Non-limiting examples of substituents commonly used in the art include C1-18 alkyl, C3-18 cycloalkyl, CB- aryl and combinations thereof, such as Cs- aryl- or C3-18 cycloalkyl-substituted C1-18 alkyl, any of which may be interrupted by 1-10 heteroatoms, such as oxygen or nitrogen, with nitrogen further substituted by any of the above described substituents.
  • the substituents may together also form a cyclic structure.
  • the ratio of the amount by weight of oligomer having the formula: to the amount by weight of the trifunctional monomer having the formula: is 0.5 to 1 .5 : 1 , preferably 0.8 to 1 .25 : 1 .
  • This ratio provides an improved balance of properties, including improved cure speed.
  • An example of a multifunctional vinyl ether monomer is tris[4-(vinyloxy)butyl] trimellitate.
  • the inkjet ink comprises 0.5 to 20% by weight in total of difunctional (meth)acrylate monomer and/or multifunctional (meth)acrylate monomer, based on the total weight of the ink.
  • the ink may also contain a resin.
  • the resin preferably has a weight-average molecular weight of 20-200 KDa and preferably 20-60 KDa, as determined by GPC with polystyrene standards.
  • the resin is preferably solid at 25°C. It is preferably soluble in the liquid medium of the ink (the radiation-curable diluent and, when present, additionally the solvent).
  • the resin may improve adhesion of the ink to the substrate. It is preferably soluble in the ink.
  • the resin, when present, is preferably present at 0.1 to 5% by weight, based on the total weight of the ink.
  • the inks can be categorised on the CIELAB (L*a*b*) colour space system.
  • the red/green opponent colours are represented along the a* axis, with green at negative a* values and red at positive a* values.
  • the yellow/blue opponent colours are represented along the b* axis, with blue at negative b* values and yellow at positive b* values.
  • the cyan ink has a* value from -60 to -10 and b* value from -70 to -20, preferably a* value from -55 to -15 and b* value from -65 to -25, more preferably a* value from -50 to -20 and b* value from -60 to -30.
  • the L* value will depend on the lightness of the cyan ink.
  • the cyan ink may have L* value from 35 to 69, preferably 40 to 67, more preferably 42 to 65.
  • the cyan ink may be a lighter cyan and have L* value from 71 to 105, preferably 73 to 100, more preferably 75 to 95.
  • the cyan pigment or magenta pigment is preferably present in an amount of 0.2 to 20% by weight, preferably 0.5 to 15% by weight, based on the total weight of the ink.
  • the inkjet ink further comprises one or more photoinitiators.
  • photoinitiators which produce free radicals on irradiation (free radical photoinitiators) such as, for example, diphenyl(2,4,6-trimethylbenzoyl)phosphine oxide (TPO), ethyl phenyl (2,4,6-trimethylbenzoyl) phosphinate (TPO-L), 1 -hydroxycyclohexyl phenyl ketone, 2- benzyl-2-dimethylamino-(4-morpholinophenyl)butan-1-one, benzil dimethylketal, phenylbis(2,4,6- trimethylbenzoyl) phosphine oxide (BAPO), 2-isopropylthioxanthone (ITX), 2,4- diethylthioxanthone (DETX) and mixtures thereof.
  • photoinitiators are known and commercially available such as, for example, under the trade names Omnirad (from IGM) and Esacure (from Lamberti).
  • the inkjet ink may also comprise one or more polymeric photoinitiators, such as Omnipol TP®.
  • Omnipol TP® is commercially available from IGM. It is a polymeric phosphine oxide photoinitiator, and is known by the chemical name polymeric ethyl (2,4,6-trimethylbenzoyl)-phenyl phosphinate or polymeric TPO-L. It has the following structure:
  • the total value of a, b and c of the chemical formula for polymeric TPO-L is equal to 1-20.
  • the ink comprises a plurality of free radical photoinitiators.
  • the total number of free radical photoinitiators present is preferably from one to five, and more preferably, two or more free radical photoinitiators are present in the ink.
  • the one or more photoinitiators if present are present from 1 to 20% by weight in total, preferably from 5 to 15% by weight in total, based on the total weight of the ink.
  • the presence of a photoinitiator is optional because the ink can cure without the presence of a photoinitiator by curing with a low-energy electron beam or curing by actinic radiation in an inert environment.
  • the one or more photoinitiator may be present in an amount of less than 20% by weight in total, preferably less than 5% by weight in total, more preferably less than 3% by weight in total, more preferably less than 1% by weight in total, based on the total weight of the ink.
  • the ink may comprise less than 0.5% by weight in total of photoinitiator, more preferably less than 0.1% by weight in total of photoinitiator and most preferably less than 0.05% by weight in total of photoinitiator, based on the total weight of the ink.
  • the inkjet ink may also be free of photoinitiator.
  • an inkjet ink that is cured with a low-energy electron beam or actinic radiation in an inert environment may still contain a small amount of photoinitiator such as 1 to 5% by weight in total of one or more photoinitiators, based on the total weight of the ink. This is required if the ink is first pinned with actinic radiation.
  • the inkjet ink preferably dries primarily by curing, i.e. by the polymerisation of the monomers present, as discussed hereinabove, and hence is a curable ink.
  • the ink does not, therefore, require the presence of water or a volatile organic solvent to effect drying of the ink.
  • the ink preferably contains less than 5% by weight, more preferably less than 2% by weight, more preferably less than 1 % by weight of water and a volatile organic solvent, based on the total weight of the ink.
  • the inkjet ink is substantially free of water and volatile organic solvents.
  • substantially free is meant that only small amounts will be present, for example as impurities in the radiation-curable materials present or as a component in a commercially available pigment dispersion. In other words, no water and a volatile organic solvent is intentionally added to the ink. However, minor amounts of water and a volatile organic solvent, which may be present as impurities in commercially available inkjet ink components, are tolerated.
  • the ink may comprise less than 0.5% by weight of water and a volatile organic solvent, more preferably less than 0.1% by weight of water and a volatile organic solvent, most preferably less than 0.05% by weight of water and a volatile organic solvent, based on the total weight of the ink.
  • the inkjet ink is free of water and a volatile organic solvent.
  • Adjustment of the surface tension of the inks allows control of the surface wetting of the inks on various substrates, for example, plastic substrates. Too high a surface tension can lead to ink pooling and/or a mottled appearance in high coverage areas of the print. Too low a surface tension can lead to excessive ink bleed between different coloured inks. Surface tension is also critical to ensuring stable jetting (nozzle plate wetting and sustainability).
  • the surface tension is preferably in the range of 18-40 mNnr 1 , more preferably 20-35 mNm 1 and most preferably 20-30 mNm 1 .
  • the ink exhibits a desirable low viscosity, less than 100 mPas, preferably 50 mPas or less, more preferably 30 mPas or less and most preferably 20 mPas or less at 25°C.
  • the ink most preferably has a viscosity of 8 to 20 mPas at 25°C. Viscosity may be measured using a digital Brookfield viscometer fitted with a thermostatically controlled cup and spindle arrangement, such as model DV1 low-viscosity viscometer running at 20 rpm at 25°C with spindle 00.
  • the present invention also provides an inkjet ink set, wherein the inkjet ink set of the invention has at least one ink that falls within the scope of the inkjet ink according to the present invention.
  • the magenta and cyan ink of the ink set fall within the scope of the inkjet ink according to the present invention.
  • the ink is cured by exposing the printed ink to a source of actinic radiation.
  • the source of actinic radiation is LEDs.
  • LEDs are increasingly used to cure inkjet inks.
  • UV light is emitted from a UV LED light source.
  • UV LED light sources comprise one or more LEDs and are well known in the art. Thus, a detailed description is not required.
  • UV LED light sources emit radiation having a spread of wavelengths.
  • the emission of UV LED light sources is identified by the wavelength which corresponds to the peak in the wavelength distribution.
  • UV LED light sources emit UV radiation over a narrow range of wavelengths on the wavelength distribution.
  • the width of the range of wavelengths on the wavelength distribution is called a wavelength band. LEDs therefore have a narrow wavelength output when compared to other sources of UV radiation.
  • a narrow wavelength band it is meant that at least 90%, preferably at least 95%, of the radiation emitted from the UV LED light source has a wavelength within a wavelength band having a width of 50 nm or less, preferably, 30 nm or less, most preferably 15 nm or less.
  • At least 90%, preferably at least 95%, of the radiation emitted from the UV LED light source has a wavelength in a band having a width of 50 nm or less, preferably 30 nm or less, most preferably 15 nm or less.
  • the ink may also be cured by exposing the printed ink to low-energy electron beam (ebeam).
  • ebeam low-energy electron beam
  • the source of low-energy electron beam can be any source of low-energy electron beam that is suitable for curing radiation-curable inks.
  • Suitable low-energy electron beam radiation sources include commercially available ebeam curing units, such as the EB Lab from ebeam Technologies with energy of 80-300 keV and capable of delivering a typical dose of 30-50 kGy at line speeds of up to 30 m/min.
  • low-energy for the ebeam, it is meant that it delivers an electron beam having a dose at the substrate of 100 kGy or less, preferably 70 kGy or less.
  • Ebeam curing is well-known in the art and therefore a detailed explanation of the curing method is not required.
  • the ink of the invention is exposed to the ebeam, which produces sufficient energy to instantaneously break chemical bonds and enable polymerisation or crosslinking.
  • the energy associated with these doses is 80-300 keV, more preferably 70-200 keV and most preferably 100 keV.
  • the method of the present invention may comprise a step of pinning the ink by exposing the ink to a first dose of radiation, followed by a step of curing the ink by exposing to a second dose of radiation.
  • Any source of radiation as described above may be used to pin or cure the ink.
  • a combination of sources may be used.
  • partial-cure and “full-cure” refer to the degree of curing of the inkjet ink.
  • partial-cure also known as pinning
  • Pinning provides a partial-cure of the ink and hence does not achieve full-cure of the ink. Partialcure does not result in full surface cure.
  • the partially cured ink will typically be liquid or a tacky film.
  • Pinning leads to a marked increase in viscosity, whereas curing converts the inkjet ink from a liquid ink to a solid film.
  • the dose of radiation for each LED source used for pinning is lower than the dose for each mercury lamp required to cure the ink fully at a constant print speed.
  • the inks are pinned within 5 seconds of impact, preferably within 1 second and more preferably within 0.5 seconds and most preferably within 0.1 seconds.
  • the pinning and/or curing steps may be performed in an inert atmosphere, e.g. using a gas such as nitrogen.
  • the method of inkjet printing of the present invention comprises inkjet printing the inkjet ink from a printing head onto a substrate, wherein the printing head moves relative to the substrate at a speed of 60 m/min or more.
  • the method is thus a method of highspeed printing.
  • High-speed printing is a term of the art.
  • the printing head moves relative to the substrate at a speed of 60 m/min or more, preferably 80 m/min or more, more preferably 100 m/min or more.
  • the printing head can move relative to the substrate at a speed of up to 300 m/min. But for some applications, the speed can be even higher than 300 m/min.
  • the advantage of high-speed printing is that a low dose per unit area is required to achieve a fully cured film.
  • the inventors have surprisingly found that the inkjet ink of the present invention, having the specific blend of components provides fast curing, through and surface cure, whilst maintaining the required jetting viscosity and flexibility of the cured film.
  • the ink cures to form a relatively thin polymerised film.
  • the ink of the present invention typically produces a printed film having a thickness of 1 to 24 pm, preferably 1 to 12 pm, for example 2 to 6 pm. Film thicknesses can be measured using a confocal laser scanning microscope.
  • PEA, IBOA, Medol-10, DPHA, DDDA, NVC and PEG600DA are monomers, as defined herein.
  • Ebecryl 81 comprises an oligomer having the following formula:
  • UV-12 is a stabiliser.
  • OH Tempo is a polymerisation inhibitor and a stabiliser.
  • TPO, Omnirad 184, ITX and Bapo are photoinitiators.
  • TegoRad 2010 is a surfactant.
  • Inks 3 and 8 are inks of the invention.
  • Inks 1-10 were then assessed for surface cure and through cure.
  • Inks 1-10 were drawn down in 12 pm films using a K2 bar onto SAV (Avery 400).
  • the 12 pm drawdowns were cured using a 16 W Honle 395 nm LED lamp, a belt speed of 60 m/min and the lamp power was set to 20%.
  • a strip of Epson paper was applied, glossy side down, across each of the prints.
  • the back of the strip of Epson paper is then rubbed with a piece of Tork Wipe 10 times (10 double rubs).
  • a double rub is where the wipe is applied to one side of the Epson paper and under light pressure, traverses the length of the Epson paper in a single stroke, and then traverses back again in a single stroke.
  • the strip of Epson paper is then removed and the glossy side is examined for evidence of off-setting from the print.
  • Inks 1-10 were drawn down in 12 pm films using a K2 bar onto SAV (Avery 400).
  • the 12 pm drawdowns for inks 1-5 were cured using a 16 W Honle 395 nm LED lamp, a belt speed of 60 m/min and the lamp power was set to 40%, which gives a dose of 133 mJ/cm 2 at intensity 2918 mW/cm 2 .
  • Viscosity and flexibility Inks 1-10 have a low, jettable viscosity and show flexibility of the cured film.

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Organic Chemistry (AREA)
  • Inks, Pencil-Leads, Or Crayons (AREA)
  • Ink Jet Recording Methods And Recording Media Thereof (AREA)

Abstract

La présente invention concerne une encre pour jet d'encre comprenant : un monomère (méth)acrylate monofonctionnel cyclique ; un monomère N-vinyl amide et/ou un monomère N-(méth)acryloyl amine ; un pigment cyan ou un pigment magenta ; et un oligomère ayant la formule suivante. L'invention concerne également un procédé d'impression par jet d'encre de l'encre pour jet d'encre selon l'invention sur un substrat et de durcissement de l'encre.
PCT/GB2024/052609 2023-10-12 2024-10-11 Encre d'impression Pending WO2025078829A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB2315672.2A GB202315672D0 (en) 2023-10-12 2023-10-12 Printing ink
GB2315672.2 2023-10-12

Publications (1)

Publication Number Publication Date
WO2025078829A1 true WO2025078829A1 (fr) 2025-04-17

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PCT/GB2024/052609 Pending WO2025078829A1 (fr) 2023-10-12 2024-10-11 Encre d'impression

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WO (1) WO2025078829A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030083396A1 (en) * 2001-07-23 2003-05-01 Ylitalo Caroline M. Ink jet ink compositions
WO2011021052A2 (fr) 2009-08-21 2011-02-24 Sericol Limited Encre, appareil et procédé d'impression
US20130127963A1 (en) * 2007-03-27 2013-05-23 Sericol Limited Printing Ink
WO2023180756A1 (fr) * 2022-03-25 2023-09-28 Fujifilm Speciality Ink Systems Limited Encre d'impression

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030083396A1 (en) * 2001-07-23 2003-05-01 Ylitalo Caroline M. Ink jet ink compositions
US20130127963A1 (en) * 2007-03-27 2013-05-23 Sericol Limited Printing Ink
WO2011021052A2 (fr) 2009-08-21 2011-02-24 Sericol Limited Encre, appareil et procédé d'impression
WO2023180756A1 (fr) * 2022-03-25 2023-09-28 Fujifilm Speciality Ink Systems Limited Encre d'impression

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