WO1996033872A1 - Verfahren und vorrichtung zum härten von uv-druckfarben - Google Patents
Verfahren und vorrichtung zum härten von uv-druckfarben Download PDFInfo
- Publication number
- WO1996033872A1 WO1996033872A1 PCT/DE1996/000767 DE9600767W WO9633872A1 WO 1996033872 A1 WO1996033872 A1 WO 1996033872A1 DE 9600767 W DE9600767 W DE 9600767W WO 9633872 A1 WO9633872 A1 WO 9633872A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- gas discharge
- low
- pressure gas
- printing
- radiation
- Prior art date
Links
- 238000007639 printing Methods 0.000 title claims abstract description 174
- 238000000034 method Methods 0.000 title claims abstract description 29
- 230000008569 process Effects 0.000 title abstract description 10
- 239000000976 ink Substances 0.000 title description 66
- 230000005855 radiation Effects 0.000 claims abstract description 100
- 239000000463 material Substances 0.000 claims abstract description 95
- 239000002245 particle Substances 0.000 claims abstract description 32
- 229920002379 silicone rubber Polymers 0.000 claims abstract description 15
- 239000004945 silicone rubber Substances 0.000 claims abstract description 12
- 238000001723 curing Methods 0.000 claims description 31
- 230000003595 spectral effect Effects 0.000 claims description 28
- 239000011230 binding agent Substances 0.000 claims description 26
- 239000011159 matrix material Substances 0.000 claims description 22
- 238000003848 UV Light-Curing Methods 0.000 claims description 18
- 230000004907 flux Effects 0.000 claims description 17
- 238000009826 distribution Methods 0.000 claims description 12
- 239000000203 mixture Substances 0.000 claims description 11
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 claims description 9
- 230000009257 reactivity Effects 0.000 claims description 6
- 125000005410 aryl sulfonium group Chemical group 0.000 claims description 4
- 239000011353 cycloaliphatic epoxy resin Substances 0.000 claims description 4
- 238000000295 emission spectrum Methods 0.000 claims description 4
- 229910000497 Amalgam Inorganic materials 0.000 claims description 2
- 239000003999 initiator Substances 0.000 claims description 2
- 239000011248 coating agent Substances 0.000 abstract description 5
- 238000000576 coating method Methods 0.000 abstract description 5
- 239000007789 gas Substances 0.000 description 92
- 239000010410 layer Substances 0.000 description 19
- 238000005286 illumination Methods 0.000 description 13
- 239000000126 substance Substances 0.000 description 12
- 230000008901 benefit Effects 0.000 description 10
- 238000012986 modification Methods 0.000 description 10
- 230000004048 modification Effects 0.000 description 10
- 238000004519 manufacturing process Methods 0.000 description 8
- 238000001816 cooling Methods 0.000 description 7
- 239000011521 glass Substances 0.000 description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 7
- 238000001228 spectrum Methods 0.000 description 7
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 6
- 239000000758 substrate Substances 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 5
- 238000004132 cross linking Methods 0.000 description 5
- 238000011161 development Methods 0.000 description 5
- 230000018109 developmental process Effects 0.000 description 5
- 238000001035 drying Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 239000003973 paint Substances 0.000 description 5
- 239000007787 solid Substances 0.000 description 5
- 239000002904 solvent Substances 0.000 description 5
- 238000002211 ultraviolet spectrum Methods 0.000 description 5
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 4
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 4
- 238000013461 design Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 239000000049 pigment Substances 0.000 description 4
- 238000003847 radiation curing Methods 0.000 description 4
- 230000035484 reaction time Effects 0.000 description 4
- 125000005409 triarylsulfonium group Chemical group 0.000 description 4
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 229910052753 mercury Inorganic materials 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 230000000379 polymerizing effect Effects 0.000 description 3
- 235000012239 silicon dioxide Nutrition 0.000 description 3
- 229910002012 Aerosil® Inorganic materials 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 239000012876 carrier material Substances 0.000 description 2
- 238000010538 cationic polymerization reaction Methods 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 239000003086 colorant Substances 0.000 description 2
- 239000003085 diluting agent Substances 0.000 description 2
- 230000003670 easy-to-clean Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- -1 hexafluoroantimonate Chemical compound 0.000 description 2
- 239000004922 lacquer Substances 0.000 description 2
- 239000000395 magnesium oxide Substances 0.000 description 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 2
- 238000007645 offset printing Methods 0.000 description 2
- 238000006116 polymerization reaction Methods 0.000 description 2
- 238000010526 radical polymerization reaction Methods 0.000 description 2
- 239000005060 rubber Substances 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 229920006362 Teflon® Polymers 0.000 description 1
- 230000032912 absorption of UV light Effects 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 150000001252 acrylic acid derivatives Chemical class 0.000 description 1
- 239000012190 activator Substances 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 238000007774 anilox coating Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 125000002091 cationic group Chemical group 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 150000002118 epoxides Chemical class 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 238000007644 letterpress printing Methods 0.000 description 1
- 230000031700 light absorption Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000012785 packaging film Substances 0.000 description 1
- 229920006280 packaging film Polymers 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 238000011417 postcuring Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 238000007650 screen-printing Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 229920006300 shrink film Polymers 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
- 238000004073 vulcanization Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000001993 wax Substances 0.000 description 1
- 239000000080 wetting agent Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M7/00—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock
- B41M7/0081—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock using electromagnetic radiation or waves, e.g. ultraviolet radiation, electron beams
Definitions
- the invention relates to a method for curing a UV-curing printing ink on a printing material, in which the printing ink is irradiated with UV light from a UV radiation source. Furthermore, it is directed to a corresponding device for irradiating the printing ink with UV light.
- UV-curing printing inks are low-solvent or solvent-free, radiation-curing printing inks and have become increasingly important in recent times. This is due to the fact that the energy of UV radiation is high and is therefore advantageous in printing processes for printing on printing materials at high printing speed, in particular in flat or letterpress printing. Also in practical use, for example with regard to pot life, the environmental pollution of solvents and disposal, they have application advantages over solvent-based paints.
- UV-curing printing inks have a UV-curable binder system composed of a polymerizing binder or binder mixture and one or more associated photoinitiators. The poly- merisation or crosslinking are triggered, whereby the color hardens.
- Known radically polymerizing binders are based on acrylates, whereas the cationically polymerizing binders are distinguished by an acid released by UV radiation. Irrespective of the specific binder system, the invention is generally directed to the curing of UV-curable printing inks.
- UV-curing printing inks are, for example, the following: sheet offset printing (for example packaging), endless offset printing (for example mail items), dry offset (indirect printing, for example cups and tubes), label printing (Book and flexo printing), flexo printing (e.g. packaging films) and screen printing (e.g. technical parts).
- sheet offset printing for example packaging
- endless offset printing for example mail items
- dry offset indirect printing, for example cups and tubes
- label printing Book and flexo printing
- flexo printing e.g. packaging films
- screen printing e.g. technical parts.
- the advantage of UV curing which is often also referred to as UV drying, is that the solvent-free or low-solvent printing inks dry quickly on the printing material by UV radiation, so that the printing material can be processed or packaged immediately.
- the invention relates to the hardening of the printed printing ink and is therefore independent of a special printing process with which the printing ink is applied to the printing material.
- the arc length of the conventionally used spotlights varies between 10 cm and 220 cm and the specific electrical outputs are in the range of 30 to 250 watts per centimeter of arc length.
- the UV light output is approximately 20 watts per centimeter of arc length.
- the fluorescent tube material consists of quartz due to the requirement of UV light transmission and the lamps are operated with a gas pressure of 1 to 2 atm.
- lasers in particular excimer lasers, are also used to generate the UV radiation.
- the abovementioned, conventionally used UV radiation sources have the advantage that they can be used to produce a very high area-related UV intensity on the printing material and thus very short curing times can be achieved, which are in the range of tenths of a second can lie.
- the disadvantage of excimer lasers is the high technical complexity. For this reason, the medium-pressure and high-pressure gas discharge lamps are more widespread. However, they have the disadvantage that their efficiency for the emission of UV light in the relevant spectral range is only about 20%, so that 80% of the energy supplied is lost and has to be dissipated by cooling.
- UV-curable coating films were used for curing
- actinic or superactinic fluorescent lamps are special low-pressure lamps in which a luminescent coating shifts the intensity maximum in the direction of red in order to obtain a spectrum that contains high proportions in the UV-A range.
- the high UV-A content was considered necessary by experts in order to ensure a rapid reaction.
- the same view is held in the professional world with regard to the curing of pigmented systems, such as printing inks.
- JP 59189340 A2 (Derwent unit no. 84-303796/49) proposed a compound which can be used as a printing ink and which can be cured with a large number of different UV radiation sources, including high-pressure, medium-pressure and low-pressure mercury lamps.
- the possible uses described in this publication show that the lamps emit predominantly in the UV-A or visible spectral range and, in addition, long irradiation times that are not comparable with fast industrial production processes are required.
- the invention is based on the object of creating a method and a corresponding device for curing a UV-curing printing ink on a printing material, which avoids the disadvantages of conventional UV gas discharge lamps associated with the high heat development.
- a low-pressure gas discharge lamp is used as the UV radiation source, the spectral radiation of which is integrated over the UV-B and UV-C range.
- Flow is more than 50%, preferably more than 75% of the UV radiation flow.
- the UV spectrum is classified according to DIN 5031, part 7. It covers the range from 100 to 380 nm, the UV-C range from 100 to 280 nm, the UV-B range from 280 to 315 nm and the UV-A range from 315 to 380 nm.
- Spectral radiation flow is understood to mean the radiation power in watts per nm as a function of the wavelength. The radiation flow is a measure of the intensity of the radiation. By integrating or summing the spectral radiation flux over a wavelength interval, the radiation flux emitted in this wavelength interval is obtained.
- Low-pressure gas discharge lamps are lamps which are generally operated with a gas pressure between 10 mbar and 50 mbar, preferably between 20 mbar and 30 mbar. Their specific electrical power consumption is considerably lower than that of medium-pressure and high-pressure lamps and is in the range between 0.2 and 2.5, preferably between 0.5 and 1.0 watts per centimeter of their arc length. Although the low-pressure gas discharge lamps have an efficiency for the relevant UV range have, which is higher than in the usual lamps and is between 30 and 40%, the total UV radiation flux achieved is considerably lower than with conventionally used lamps. It is approximately 0.2 watts per centimeter of arc length and is thus approximately a factor 100 smaller than in the previously used medium and high pressure lamps.
- UV-curing printing inks can also be cured satisfactorily with low-pressure gas discharge lamps, even if the printing ink has a UV illuminance of between 1 and 100 mW / cm 2 , preferably between 10 and 50 mW / cm 2 , is irradiated.
- the UV irradiance of the printing material is approximately 1 W / cm.
- the irradiance relating to the printing material indicates which radiation flow strikes a surface element of the printing material, which element may be inclined at an angle to the direction of radiation.
- the irradiance has the unit W / cm 2 .
- low-pressure gas discharge lamps has various advantages that are important for practical use. Their surface temperature is considerably lower. With mercury vapor lamps, it is around 30 ° C during normal and optimal operation. In the case of amalgam emitters, which have the advantage of a somewhat higher UV light yield than mercury vapor lamps, the temperature in normal operation is approximately 120 ° C. This lower surface temperature in connection with the lower power consumption leads to a considerably reduced temperature load on the surroundings of the lamp and the printing material. However, the reduced heating of the impression cylinder is also technically advantageous, particularly in the case of multicolor printing units. So far, a very high technical outlay has been required to temper the impression cylinder to a constant temperature, since this is of decisive importance for the quality and the feasibility of the printing process because of the thermal expansion. Because of the reduced temperature load, it is also possible to print on printing materials which have not previously been printable using UV-curing printing inks, for example temperature-sensitive plastic films (for example shrink films).
- temperature-sensitive plastic films for example shrink films
- the proportion of the dryer unit in the total power consumption of 100 kW of a printing press can be reduced to approximately 10 to 15 kW or less.
- the power consumption of a medium-pressure gas discharge lamp with the associated cooling fan is typically approximately 3.5 kW.
- the power consumption of 10 low-pressure gas discharge lamps according to the invention with the associated fan is only approx. 400 W.
- low-pressure gas discharge lamps In addition to the reduced temperature load and risk of burns as well as the reduced power loss, further advantages of the low-pressure gas discharge lamps are a shorter replacement time, since the lamps hardly need any time to cool down after a defect and can therefore be changed more quickly. Low-pressure gas discharge lamps also have the advantage over conventional lamps that they require only a short or no warm-up time before stable operating conditions are reached, and can be restarted immediately after being switched off, and that the intensity of the lamp is adjustable. In addition, as with medium-pressure lamps, there is no risk of burnt-in droplets of paint or dirt particles on the bulb, which can lead to the lamp being destroyed. The lifespan of low-pressure gas discharge lamps is around 8,000 hours, at least four times as long as that of medium-pressure lamps.
- the invention thus achieves goals that the professional community has long sought.
- the following measures are preferably used individually or in combination with one another.
- the spectral radiation flux integrated over the UV-B range is more than 50%, preferably more than 75%, of the UV radiation flux.
- the lamp will be referred to as a UV-B lamp.
- the spectral radiation flow integrated over the UV-C range is more than 50%, preferably more than 75%, of the UV radiation flow.
- the lamp will be referred to as a UV-C lamp.
- both UV-C and UV-B low-pressure gas discharge lamps have been found to be advantageous for the curing process.
- the spectral radiation flow integrated over the UV-C range can be more than 50%, preferably more than 75%, of the UV radiation flow.
- the spectral radiation flow integrated over the UV-B range can accordingly be more than 50%, preferably more than 75%, of the UV radiation flow.
- the maximum of the spectral radiation flux distribution, in particular of the UV radiation flux, of the low-pressure gas discharge lamp can advantageously be in the UV-B or UV-C range.
- this refers to the wavelength with the highest UV intensity.
- this information relates to the maximum of the spectral radiation flux distribution. If the UV spectrum has both lines and continua, this characteristic refers to the maximum in terms of lines and continuous emission ranges.
- a low-pressure gas discharge lamp be used whose spectral UV radiation flow integrated above a wavelength of 190 nm, in particular above 240 nm, more than 50%, preferably more than 75%, of its UV Radiation flux, especially their UV-C radiation flux, is.
- the spectral UV-C radiation flow integrated above a wavelength of 190 nm, in particular above 240 nm is more than 50%, preferably more than 75%, of the UV radiation flow.
- the low-pressure gas discharge lamp emits more than 50%, preferably more than 75%, of the radiation flow of its UV light in the UV-C range above a wavelength of 240 nm.
- UV-C low-pressure gas discharge lamps is normally in the wavelength range between 249 and 259 nm, in particular at 254 nm.
- UV-B low-pressure gas discharge lamps are also referred to as UV-B fluorescent lamps. They have a phosphor coating that shifts the maximum of the radiation flow into the UV-B range. It is advantageously above 305 nm.
- the respective position of the intensity maximum and the emitted lines, and in particular their line width, can be influenced by the phosphor or the phosphor mixture.
- the possible bandwidth ranges from very narrow-band, almost monochromatic UV-B radiation to an emission covering almost the entire UV-B range.
- UV-B low-pressure gas discharge lamps emit more than 50%, preferably more than 75%, of their UV light in the UV-B range.
- low-pressure gas discharge lamps are preferred within the scope of the invention, the emission spectrum of which is not shifted towards longer wavelengths by the addition of phosphors. This means that neither an actinic nor a superactinic gas discharge lamp is used.
- the UV-B lamps are not quite as advantageous as UV-C emitters, since their light yield is lower due to the light conversion step and the printing ink may be less reactive in the spectral range they emit than in UV-C Area is; however, they also represent an economically interesting improvement over the known medium-pressure and high-pressure lamps.
- a plurality of low-pressure gas discharge lamps with different emission spectra are used, in particular a combination of a UV-C lamp with a UV-B low-pressure gas discharge lamp.
- the possibly advantageous use of low-pressure gas discharge lamps with differing emission spectra for generating mixed light can be achieved both by using different lamps and also by using lamps which are only partially coated with phosphor.
- the ratio of the integrated UV-B to the integrated UV-C radiation flow can be between 0: 1 and 1: 0, with a higher UV-C proportion generally being preferred for the reasons mentioned above.
- a printing ink which contains a binder system with the following components: a) one or more cycloaliphatic epoxy resins as hardenable binder and b) one or more arylsulfonium salts as photoinitiators.
- a cycloaliphatic epoxy resin is a cationically curable binder.
- the paint can of course also contain other conventional constituents, such as further photoinitiators, solvents, pigments, dyes, diluents, reactive diluents, waxes, leveling agents, wetting agents or other additives.
- component b) contains a triarylsulfonium salt. It is preferred if the triarylsulfonium salt contains a triarylsulfonium antimonate, in particular a triarylsulfonium hexafluoroantimonate. Advantageously, it can further be provided that component b) contains a mixture of different arylsulfonium salts. In addition to the cycloaliphatic epoxy resin, other binders can also be contained in the printing ink.
- Radical-curing printing inks are predominantly used in printing technology because, compared to a cationically curing printing ink, they have a shorter drying time when irradiated with a conventional medium-pressure lamp.
- the free-radically curing paints also have the advantage that their chemical composition can be varied very widely.
- the binders mostly used here mostly absorb considerably in the UV-C range, so that even when using photoinitiators absorbing in the UV-C range, only a low reactivity of the printing ink can be achieved.
- the binders used in cationically curable printing inks are highly transparent in the UV-C range, so that a high reactivity can also be achieved with a UV-C or UV-B low-pressure gas discharge lamp.
- cationically curing inks based on epoxides are preferred in the context according to the invention. Radically curing paints can also be used.
- a printing ink is hardened by means of the printing process according to the invention, the binder component of which is highly transparent to the UV light emitted by the low-pressure gas discharge lamp in the UV-C or UV-B range, so that deep-lying layers can still be reached to a sufficient extent by UV light.
- the absorption curve of the binder should correspond to the standard binders used in high and medium pressure lamps, shifted to shorter wavelengths.
- the usual layer thicknesses for offset are between 1 and 3 ⁇ m and for flexo printing between 3 and 8 ⁇ m.
- there are squeeze edges each of a maximum of 20 ⁇ m thick so that the binder is sufficient up to a thickness of 20 ⁇ m should be transparent.
- the transparency of the binder is so high up to this layer thickness that it does not absorb more than half of the incident UV intensity of the low-pressure gas discharge lamp.
- the properties of the binder namely its transparency for the UV light used, and the reactivity of the binder photoinitiator system are of particular importance.
- the individual components should be miscible and compatible with one another, ie should not trigger spontaneous reactions.
- the fillers and additives can be in liquid or solid form and are subject to the same requirements with regard to transparency for UV light as the binders.
- the pigments can be of an inorganic or organic type.
- Inorganic are generally solids, organic ones can be solid or liquid.
- the concentration and absorption properties must be set in a suitable manner. This also applies to solid pigments, which also have scattering effects depending on the grain size.
- the printing ink should be sufficiently reactive for the UV light and be activated by it. This applies in particular to the photoinitiators, which should be sufficiently reactive in the wavelength range used.
- the reactivity means two things. On the one hand, the absorption of UV light must be sufficiently high. Another- On the one hand, the photoinitiators should also transfer or convert the absorbed energy well to the corresponding radicals (radical polymerization) or acids (cationic polymerization) in order to trigger the chain reaction for the polymerization.
- the photoinitiator should therefore absorb to a sufficiently high degree and be present in a suitable concentration. He must also be able to transfer the energy of the absorbed UV light to the monomers. This applies both to radical and cationic hardening.
- a printing ink is hardened, the binder component of which is highly transparent to the UV light emitted by the low-pressure gas discharge lamp and the photoinitiator component of which is the UV light emitted by the low-pressure gas discharge lamp both in one absorbed to a high degree, and can also be activated and reactive at these wavelengths.
- the binder and photoinitiator components of the printing ink are composed and matched to one another in such a way that the printing ink can be cured with the UV light emitted by the low-pressure gas discharge lamp up to a layer thickness of 20 ⁇ m .
- the printing ink has a high reactivity even at room temperature.
- the printing ink is hardly or not heated at all in the process according to the invention; the temperature advantageously does not bear more than 40 ° C. during UV curing. In conventional high and medium pressure lamps, significantly higher temperatures occur, which also has disadvantages in terms of application technology.
- the duration of the UV radiation for curing the printing ink is less than 2 seconds, preferably less than 1 second.
- the short reaction time of the printing ink is advantageous for realizing high production speeds or short distances between the individual printing stations.
- the reaction time is understood to be the time which elapses until the surface of the printing ink becomes tack-free, so that the printing material can be printed on or otherwise processed in further printing stations.
- the curing time can be considerably longer. In the case of radically curing printing inks, the curing time is only insignificantly longer than the reaction time.
- UV radiation generally only initiates or pre-cures, the post-curing being very short or being in the range up to 24 hours.
- the short irradiation time or reaction time is not only important for printing a large number of pieces per unit of time, but also for multicolour printing.
- the duration during which the printing ink is irradiated with UV light depends on the speed at which the printing material with the printing ink is moved relative to the low-pressure gas discharge lamp during UV curing, and on the of low pressure gas discharge lamp irradiated area.
- printing methods can advantageously be carried out in which the printing material has a web speed of more than 20 m / min., Preferably more than 40 m / min. and particularly preferably more than 50 m / min. is moved.
- the multi-cylinder printing machine is a type of rotary machine in which four or six individual printing units, in particular for printing several colors, are placed in a stand.
- the tandem printing machine is a type of rotary machine in which each printing unit is placed in its own stand.
- the single-cylinder machine or central-cylinder machine is a type of rotary machine in which the printing units are arranged around a central, common counter-pressure cylinder.
- the device according to the invention for curing a UV-curing printing ink on a printing material, by means of which the printing ink is irradiated with UV light from a UV radiation source, in particular for carrying out a method according to the invention has the special feature that the UV radiation source comprises a low-pressure gas discharge lamp whose spectral radiation flow integrated over the UV-B and UV-C range is more than 50%, preferably more than 75% of the UV radiation flow.
- the UV radiation source comprises a low-pressure gas discharge lamp whose spectral radiation flow integrated over the UV-B and UV-C range is more than 50%, preferably more than 75% of the UV radiation flow.
- the dryer can include one or more UV radiation sources. If several UV radiation sources are provided, these can be of the same or different types. In special cases it can also be advantageous if, in addition to a low-pressure gas discharge lamp, there are also other, previously customary radiation sources. The exclusive use of low-pressure gas discharge lamps is preferred. According to an advantageous feature, it is proposed that the dryer have more than four, preferably more than eight, low-pressure gas discharge lamps.
- An advantageous embodiment can be, in particular, that the dryer has a plurality of low-pressure gas discharge lamps arranged side by side.
- the low-pressure gas discharge lamps can be rod-shaped.
- the dryer has a plurality of U-shaped low-pressure gas discharge lamps which are arranged next to one another with the long sides of the U-shape.
- U-shaped low-pressure gas discharge lamps have the advantage that a relatively high illuminance can be achieved with them.
- the low-pressure gas discharge lamps are arranged alternately in opposite directions, they can be strung together particularly closely, since the open and the closed ends of the U-forms form an alternating sequence and the open ends provided with the electrical connection contacts with electrical ones Connecting elements contact are animalable without the distance between the low-pressure gas discharge lamps being limited by the connecting elements.
- the distance between the lamps and the lamps from the printing material is advantageously subject to the requirement that the irradiance in the plane of the printing material, based on the mainly effective area, i. for example without taking the inlet and outlet zones into account, is as homogeneous as possible.
- the irradiance in the plane of the printing material based on the mainly effective area, i. for example without taking the inlet and outlet zones into account, is as homogeneous as possible.
- the low-pressure gas discharge lamps can be arranged at a close distance from one another.
- the pistons of the low-pressure gas discharge lamps can even be arranged without a distance from one another and abut one another.
- the distance between the low-pressure gas discharge lamps, measured between their bulbs, is advantageously not more than 30%, preferably not more than 20%, than the diameter of the bulbs of the low-pressure gas discharge lamps.
- the distance between the low-pressure gas discharge lamp and the printing material should be at least so large that no contact is made with the lamp due to fluctuations in the position of the printing material.
- a reasonable minimum distance from a practical point of view is 1 cm.
- the upper limit of the distance between the surface of the Low-pressure gas discharge lamp and the substrate can advantageously be less than 5 cm.
- the device has a reflector, with which UV light emitted by the low-pressure gas discharge lamp is reflected onto the printing ink to be cured.
- a reflector By means of a reflector, UV light can be used for UV curing, which is not emitted by the low-pressure gas discharge lamp in the direction of the printing material, and a more uniform illumination of the printing material can be achieved.
- the reflector is advantageously arranged on the side of the low-pressure gas discharge lamp facing away from the printing material, so that it reflects the UV light emitted in this direction by the low-pressure gas discharge lamp to the printing material.
- a reflector is arranged on the side of the substrate facing away from the illumination source in order to illuminate the substrate more uniformly on all sides.
- Reflectors arranged on the side of the low-pressure gas discharge lamp facing away from the printing material are also known in the prior art in connection with medium and high-pressure lamps. They usually consist of metal plates and can be swiveled in order to be able to reduce the thermal load on the printing material when the system is at a standstill.
- a reflector according to the invention can preferably be fixed, since the thermal load on the printing material by the low-pressure gas discharge lamp is not critical and, because of its immediate restartability, it can be switched off if necessary.
- the reflector is therefore technically less complex and less expensive.
- the reflection layer of the reflector can be composed of flat partial surfaces.
- a particularly advantageous embodiment in terms of production technology is that the reflector has a single plane reflection layer. If the reflector is also fixed, the technical effort is particularly low.
- the reflector can be arranged in a conventional manner at a distance from the low-pressure gas discharge lamp. Due to the reduced surface temperature of the low-pressure gas discharge lamp, however, it is also possible for the reflector to be in line contact or in surface contact with the low-pressure gas discharge lamp. In this way, a very compact design of the dryer can be realized with a high luminous efficacy.
- the surface contact can advantageously be 30% to 60% of the area of the bulb or the circumference of a cross section of the low-pressure gas discharge lamp. The optimum value in each case is determined by the expansion of the printing material and its distance from the low-pressure gas discharge lamp.
- the reflector has a dielectric mirror layer.
- a dielectric mirror layer is a multilayer system made of optical coating layers that increase the reflectance.
- the reflector itself can consist of metal, glass or other suitable materials.
- the reflector is advantageously diffusely reflective, ie the reflector has a reflective layer made of an optically diffusely reflecting material.
- Optically diffusely reflecting materials are substances which, owing to their composition, reflect diffusely on incident optical radiation or allow penetrating radiation to emerge diffusely. They can therefore be referred to as Lambertian surfaces or as Lambertian emitters. As a rule, they are matt white.
- the optically diffusely reflecting material can be made in a known manner from ceramic plates or from metal reflectors which have a roughened, metallic, reflecting surface (e.g. aluminum plates).
- the optically diffusely reflective material of the reflective layer of the reflector has a matrix of a transparent matrix material consisting essentially of a hardenable silicone rubber, in which diffusely reflecting particles are embedded.
- a transparent matrix material consisting essentially of a hardenable silicone rubber, in which diffusely reflecting particles are embedded.
- Such a material is optically, chemically, biologically and temperature-resistant, insensitive to dirt and easy to clean. It has good aging resistance and high transparency, in particular UV transparency.
- the matrix material according to the invention essentially consists of a silicone rubber. Essentially means in this case that the silicone rubber contains no more foreign substances than can be tolerated in order to achieve the desired properties, that is to say the properties of the matrix material are determined by the silicone rubber. As a rule, the matrix material will consist of a silicone rubber with a commercial, preferably high, purity of, for example, more than 95%.
- silicone rubbers are suitable within the scope of the invention.
- a suitable silicone rubber with the required properties can be selected as the matrix material. Both condensation-crosslinking and addition-crosslinking rubbers can be considered.
- Silicone rubbers can advantageously be processed in a pourable consistency, so that any shape can be produced inexpensively for many areas of application.
- Other inexpensive manufacturing processes such as spraying, are also advantageously possible, since first the thin, hardenable silicone rubber is processed and then the vulcanization can take place with the formation of a hardened, solid matrix material.
- Shore A hardness of the hardened matrix material according to DIN 53505 is between 20 and 90, since in this area the matrix material has an advantageous inherent strength.
- the reflective particles are contained in powdered form in the matrix material.
- the reflective particles should be embedded in the matrix material in a homogeneous distribution.
- diffusely reflecting substances are suitable as diffusely reflecting particles in the context of the invention.
- Such diffusely reflecting substances are, for example, magnesium oxide, aluminum oxide, titanium dioxide, polytetrafluoroethylene (Teflon (R)) or silicon dioxide (Aerosil (R)).
- Teflon (R) polytetrafluoroethylene
- Si dioxide Si dioxide
- Barium sulphate has proven to be particularly advantageous in the context of the invention.
- the diffusely reflecting particles essentially comprise one or more of the substances mentioned. Essentially, this means that other particles are not or only to such an extent contained in the material that in the respective application the diffuse reflective properties correspond to the requirements and the reflective properties are determined by the particles.
- the particles will be present as pure substance with a high degree of purity that can be produced commercially, in the matrix material, for example with a degree of purity of over 99%. In optical measurement technology in particular, a very high degree of purity as well as a homogeneous distribution can be advantageous.
- the particles of each substance can have a grain size or, in order to achieve special spectral properties, consist of a mixture of different grain sizes.
- the reflecting particles in the material according to the invention can consist of only one of the substances mentioned or of a mixture of two or more different substances. For technical reasons, the addition of particles of only one substance is preferred. In special applications, in particular However, in order to achieve a specific spectral behavior it can also be advantageous to use a mixture of different substances and / or a mixture of different grain sizes.
- the grain size of the abovementioned particles is advantageously essentially between 1 ⁇ m and 100 ⁇ m, for silicon dioxide (Aerosil (R)) between 10 nm and 200 nm. This essentially means that the mean value of the grain size distribution is in this range. Since the particle size of particles or of powder includes a certain tolerance and particle size range or a particle size distribution due to the production process, there may also be small particles, for example up to 5%, which are outside the specified size range.
- the full width at half maximum of the respective particle size distribution can be critical in some applications, but rather insignificant in other applications.
- Experimental investigations can be used in individual cases to determine which particle size and particle size distribution provide the desired reflection properties.
- the advantages of the material according to the invention are that it can be used in a wide variety of ways and can be produced in a manner that is both mechanically and optically adapted to the respective application without problems. It can be designed to be self-supporting in almost any shape or can be stably applied to a carrier material, with unevenness of the carrier material being able to be compensated for and covered. It is optically, thermally and biologically stable and insensitive to temperature. It is easy to clean and absorbs little light. The respective properties can be optimized for specific application requirements become. It also does not require a complicated manufacturing process and is therefore inexpensive to manufacture. The hardness is adjustable over a wide range, so that many different application forms are possible.
- flexible mats can be produced with sufficient stability, for example by applying an impression material to a shape that can be curved and arched almost at will.
- the material can be processed and machined without problems, can be firm or flexible and can also be glued.
- Shaped bodies can also be produced by casting or spraying.
- the material has no inherent color, so that there is no adverse influence on the spectrum.
- the surface of the reflecting material facing the incident light does not have to be matt, as is required with known materials, that is, it does not have to have a "molecular roughness" in order to achieve good diffuse reflection behavior. For this reason, shaping by molding on smooth surfaces of molds is also possible.
- the material according to the invention is advantageously produced in such a way that the particles are stirred into liquid matrix material under a vacuum. In this way, bubble-free vulcanizates can be produced.
- Fig. 2 shows a schematic cross section through a
- FIG. 3 shows a modification to FIG. 1,
- Fig. 4 shows a modification to FIG. 2,
- Fig. 5 shows a schematic cross section through a first dryer according to the invention
- Fig. 6 shows a first modification to FIG. 5
- Fig. 7 shows a second modification to FIG. 5,
- FIG. 11 shows a modification to FIG. 8,
- FIG. 17 shows a schematic cross section through a dryer according to the invention
- 21 shows a spectral radiation flow of a UV-B low-pressure gas discharge lamp.
- FIG. 1 shows a schematic cross section through a dryer 20 according to the prior art, and to be precise in the operating state, that is to say during the curing of printing material 9 which is guided past it and is printed with a UV-curing printing ink 14.
- a UV radiation source 8 which is a medium-pressure gas discharge lamp, generates UV light, which triggers the polymerization of the printing ink 14.
- the printing material 9 is guided past the UV radiation source 8 in the transport direction 10.
- Swivel reflectors 21 are provided to increase the light yield and to even out the illuminance on the printing ink 14. They can each be pivoted from the operating state shown in FIG. 1 to the position shown in FIG. The pivoting of the reflectors 21 is necessary because the medium-pressure lamp has a very high surface temperature and the printing material 9 would burn if it did not move relative to the lamp 8.
- FIGS. 3 and 4 show modifications to FIGS. 1 and 2, which differ in that instead of the heat-insulating glass 22, cooling tubes 35 through which water flows are provided for dissipating the heat loss.
- FIG. 5 shows a schematic cross section through a dryer 20 according to the invention.
- the UV radiation sources 8, to which the printing material 9 printed with printing ink 14 is guided in the transport direction 10 to harden the printing ink 14, are a plurality of low-pressure presses arranged next to one another.
- the UV-C lamps of the type TUV from Philips have been used as low-pressure gas discharge lamps a main emission at 254 nm and the UV-B emitters of the type TL / 01 with a main emission at 311 to 312 nm or of the type TL / 12 with a main emission at 306 nm have proven to be advantageous. They are highly efficient for UV light and can be operated practically without ozone generation.
- the reflector 5 can be stationary, namely at a short distance from the lamps.
- the distance between reflector 5 and UV radiation source 8 can be less than twice, preferably smaller than the simple diameter of the bulb 16 of the UV radiation source 8.
- the reflector 5 comprises three planar reflectors 5, namely a large reflector 5a arranged on the side of the lamp 8 facing away from the printing material 9, and two smaller reflectors 5b arranged on the side.
- the reflectors comprise a reflection layer made of a reflective material 1.
- the reflective material 1 can be designed in a conventional manner, for example as a ceramic plate or as a metal reflector.
- the metal reflector can have a roughened, metallic, reflecting surface and can consist, for example, of aluminum.
- the reflective layer of the reflector 5 preferably consists of an optically diffusely reflective material according to the invention with a matrix material made of curable silicone rubber and particles embedded therein in a homogeneous distribution.
- the particles consist of powdered barium sulphate, which has a grain size of approximately 50 ⁇ m. Due to their small size, the particles cannot be seen in FIG. bar.
- the weight ratio of the particles to the matrix material is approximately 1:10. If the ratio is less than 1: 100, the reflection is usually too low. At weight ratios above 1: 1, the degree of filling of the matrix material by the particles will generally be so high that the silicone will become brittle or will no longer be properly vulcanized.
- the reflectance of the reflector 5 is over 90%.
- the thickness of the reflective layer, i.e. material 1, is a few millimeters. It can advantageously be in the range between 0.1 and 10 mm.
- the reflector 5 can thus be a so-called volume reflector, which differs from a pure surface reflector in that the reflection also takes place in deeper material layers.
- the reflective material 1 or the reflector sheets are applied to a carrier plate 6 or a part of the housing 27.
- the matrix material 2 or the reflecting material 1 can be connected directly to the substrate as a condensation-crosslinking silicone rubber. It can be applied to the carrier plate 6, for example, by a spray technique. If the matrix material is an addition-crosslinking rubber, it can be connected to the substrate by a suitable joining technique, for example by means of gluing.
- Silicon rubbers in particular are those marketed by Wacker-Chemie GmbH, Kunststoff, under the type name "Elastosil (R)", in particular types M 4600, R 401, R 402, R 411, R 420, R 4000 and R 4105, as well as the types Semicosil, especially the types 911, 912, as well as the types RTV-E 604, RTV-ME 601 and SilGel 612, have proven to be advantageous.
- FIG. 6 shows a modified reflector 5.
- the reflection layer made of reflecting material 1 consists of a matrix material according to the invention made of silicone rubber with diffusely reflecting particles. It is fastened to a carrier plate 6 or to a housing part 27.
- the special feature of the reflection layer is that its surface facing the UV radiation sources 8 has concavely curved partial regions with respect to the radiation sources. These are arranged at a small distance, which can be less than half the diameter of the bulb 16 of the UV radiation source 8, from the surface of the bulb 16 of the respective UV radiation source 8.
- the center point of the respective curvature of the reflector 5 can lie in the interior of the associated low-pressure gas discharge lamp, in particular in the center thereof. In this way, a very compact design with simultaneous illumination of the printing material 9 is achieved.
- the reflective layer made of diffusely reflecting material 1 is in direct contact with the bulb 16 of the UV radiation sources 8, which is possible in particular in the case of low-pressure mercury gas discharge lamps.
- FIG. 7 shows a schematic cross section through a dryer 20, which differs from the dryers according to FIGS. 5 and 6 in that the reflector 5 consists of one or more reflector plates which are not planar but with respect to the UV radiation sources 8 are concavely curved. Because of the low heat generation of the low-pressure gas discharge lamps used according to the invention, this reflector 5 can also be fixed and arranged at a short distance from the lamps.
- FIGS. 8 to 10 show perspective views, specifically FIG. 8 for FIG. 5, FIG. 9 for FIG. 6 and FIG. 10 for FIG. 7. In all the figures, construction elements such as electrical lines, cooling devices and mechanical holders are not shown for the sake of clarity .
- FIGS. 11 to 13 show modifications to FIGS. 8 to 10, which differ in the transport direction 10 of the printing material 9.
- the printing material 9 is transported perpendicular to the axial direction of the UV radiation sources 8.
- the transport takes place in the axial direction of the UV radiation sources 8.
- the transport direction 10 can form any desired angle to the axis of the low-pressure gas discharge lamps. From the point of view of optimizing the use of the emitted UV light and in order to achieve an even exposure time distributed over the printing material, the transport directions 10 shown are preferred.
- FIGS. 14 and 15 show schematic top views of a plurality of UV radiation sources 8, which are U-shaped low-pressure gas discharge lamps 7.
- the total of nine lamps in the example shown are arranged with their longitudinal sides next to one another for uniform illumination of the drying surface of the printing material 9.
- the lamps are alternately arranged in opposite directions.
- the electrical connection elements 13 therefore form an alternating sequence with the closed ends of the U-shaped lamps on both sides of the arrangement, so that there is sufficient space between the electrical connection elements 13 and the distance between them Lamps is not limited by the electrical connection elements 13.
- FIGS. 14 and 15 differ in the transport direction 10 of the printing material 9, the drying surface of which is to be cured with UV printing ink 14 is guided past the lamps.
- the reflectors are not shown in FIGS. 14 and 15.
- FIG. 16 shows a schematic cross section through a dryer 20 and a printing press.
- a UV radiation source 8 a high-pressure gas discharge lamp emitting in the UV region.
- pivoting reflectors 21 in the housing 27, by means of which the light is directed onto the printing material 9 and which can be pivoted when the system for protecting the printing material 9 is stopped from overheating.
- a heat protection glass 22 is also provided.
- one or more low-pressure gas discharge lamps should therefore be used as the UV radiation source 8.
- the pivoting reflector 21 can then be designed in the manner described above as a fixed reflector and the heat protection glass 22 can be omitted. In this way, the dryer 20 can be of compact construction and illuminate the printing material 9 uniformly, the heat load being reduced considerably at the same time.
- the printing materials 9 are tubes or cups which are arranged on rotating tube mandrels 26 of a tube plate 25.
- the UV-curable printing ink 14 is supplied to the printing unit comprising the anilox roller 23 and the plate roller 24 by means of a doctoring chamber or ink chamber, not shown.
- the motif is transferred from the cliché roller 24 to the tubes wear, and the rotating tube plate 25 leads the tubes through the curing zone of the dryer 20, where the curing takes place by means of UV radiation.
- the tubes After exiting the hardening zone, the tubes are removed from the tube mandrels 26 and the tube mandrels 26 are fitted with new, unprinted ones.
- the clamping and removal devices are not shown.
- the optically diffusely reflecting material 1 can be attached to separate carrier plates 6 or to the housing 27.
- the uniformity of the illumination and the light yield can be improved.
- the swivel reflectors 21 can also be provided with material 1 according to the invention, or a stationary reflector according to the invention arranged on the side of the illumination source 8 facing away from the printing material 9 can be provided .
- FIG. 17 shows the dryer of FIG. 16 in an embodiment according to the invention with low-pressure gas discharge lamps 7.
- the printing materials 9 are also tubes or cups arranged on rotating tube mandrels 26 of a tube plate 25 in this case. They are conveyed through the dryer 20 at a web speed of approximately 50 m / min. In addition to this path movement, the tube mandrels 26 rotate.
- the dryer 20 comprises a housing 27, in which the reflective material 1 on carrier plates 6 in order to achieve a homogeneous illumination of the printing Material is arranged in the curing zone.
- the reflector 5, in conjunction with the 12 low-pressure gas discharge lamps 7, ensures homogeneous illumination.
- the low-pressure gas discharge lamps 7 are arranged at a close distance from one another and the printing material 9 is guided past the low-pressure gas discharge lamps 7 at a short distance. Due to the low heat development of the low-pressure gas discharge lamps 7, no complex cooling device and no heat protection glass are required.
- the reflector 5 is fixed and has no pivotable parts.
- FIG. 18 shows a detail of FIG. 17.
- FIGS. 19, 20 and 21 show typical relative spectral radiation flows from mercury vapor lamps.
- 19 and 20 each show the spectral radiation flux E in arbitrary units as a function of the wavelength w and in FIG. 21 in absolute units as a function of the wavelength w.
- FIG. 19 shows the spectrum of a high-pressure lamp
- FIG. 20 shows that of a UV-C low-pressure lamp. It can be seen that the UV-C low-pressure gas discharge lamp predominantly emits in the UV-C range, whereas the main emission range of the high-pressure lamp is at longer wavelengths.
- the UV-C low pressure gas discharge lamp of Fig. 20 is a low pressure lamp without the addition of phosphors, i.e. a non-actinic low pressure lamp.
- 21 shows the spectrum of a UV-B low-pressure gas discharge lamp. This is a fluorescent lamp, the main emission area of which is shifted into the area at 305 nm by the addition of fluorescent materials. In addition, secondary intensities occur in the UV-A and visible range.
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Electromagnetism (AREA)
- General Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
- Printing Methods (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE59604303T DE59604303D1 (de) | 1995-04-27 | 1996-04-25 | Verfahren und vorrichtung zum härten von uv-druckfarben |
EP96914049A EP0822902B1 (de) | 1995-04-27 | 1996-04-25 | Verfahren und vorrichtung zum härten von uv-druckfarben |
US08/945,614 US6280801B1 (en) | 1995-04-27 | 1996-04-25 | Process and device for curing U/V printing inks |
JP8532094A JPH11509788A (ja) | 1995-04-27 | 1996-04-25 | Uv印刷インクを硬化させる方法および装置 |
US09/789,053 US20010009701A1 (en) | 1995-04-27 | 2001-02-20 | Process and device for curing UV printing ink |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19515462.2 | 1995-04-27 | ||
DE19515462 | 1995-04-27 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1996033872A1 true WO1996033872A1 (de) | 1996-10-31 |
Family
ID=7760479
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE1996/000767 WO1996033872A1 (de) | 1995-04-27 | 1996-04-25 | Verfahren und vorrichtung zum härten von uv-druckfarben |
Country Status (5)
Country | Link |
---|---|
US (2) | US6280801B1 (de) |
EP (1) | EP0822902B1 (de) |
JP (1) | JPH11509788A (de) |
DE (1) | DE59604303D1 (de) |
WO (1) | WO1996033872A1 (de) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0930104A2 (de) * | 1997-12-09 | 1999-07-21 | Bush Industries, Inc. | Verfahren und Vorrichtung zum Vernetzen und Härten von Lack |
DE10238253B4 (de) * | 2002-08-21 | 2007-12-13 | Advanced Photonics Technologies Ag | UV-Bestrahlungsanlage zur Erzeugung eines ausgedehnten UV-Strahlungsfeldes |
WO2019042622A1 (de) * | 2017-09-04 | 2019-03-07 | Krones Ag | Behandlungseinheit für behälter |
CN115107392A (zh) * | 2021-03-17 | 2022-09-27 | 海德堡印刷机械股份公司 | 在印刷机中借助经不同操控的气体放电灯硬化涂层的方法 |
Families Citing this family (36)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6220154B1 (en) * | 1999-10-01 | 2001-04-24 | Apex Machine Company | Dry offset rotary printer for labeling wine corks |
EP1288723A4 (de) * | 2000-05-15 | 2006-09-20 | Yupo Corp | Elektrophotographisches aufzeichnungspapier und labelpapier |
US7073901B2 (en) * | 2001-04-13 | 2006-07-11 | Electronics For Imaging, Inc. | Radiation treatment for ink jet fluids |
US7316182B2 (en) * | 2001-08-15 | 2008-01-08 | Integrity Engineering, Inc. | Ink proofer arrangement including light source for curing ink |
JP2003285530A (ja) * | 2002-03-28 | 2003-10-07 | Konica Corp | インクジェット画像形成方法およびインクジェットインク |
US6671087B2 (en) | 2002-04-09 | 2003-12-30 | Premakaran T. Boaz | Reflector assembly for UV-energy exposure system |
US20040032034A1 (en) * | 2002-08-14 | 2004-02-19 | Fitel Usa Corp. | Ultraviolet (UV) oven with segmented reflectors |
US7131722B2 (en) * | 2002-08-30 | 2006-11-07 | Konica Corporation | Ink jet printer and image recording method using a humidity detector to control the curing of an image |
US7238328B2 (en) * | 2002-12-06 | 2007-07-03 | Sonoma Technology, Inc. | Solid-state light source photolytic nitrogen dioxide converter |
US20040126507A1 (en) * | 2002-12-26 | 2004-07-01 | O'brien Jeffrey James | UV inkjet printed substrates |
US8455064B2 (en) | 2002-12-26 | 2013-06-04 | Exxonmobil Oil Corporation | UV inkjet printed substrates |
US7669530B2 (en) * | 2003-05-16 | 2010-03-02 | Printing Research, Inc. | UV curing assembly having sheet transfer unit with heat sink vacuum plate |
US6807906B1 (en) * | 2003-05-16 | 2004-10-26 | Printing Research, Inc. | Zoned ultraviolet curing system for printing press |
WO2005114265A1 (en) * | 2004-05-13 | 2005-12-01 | Novatron, Inc. | Light flux transformer |
DE102004048005A1 (de) * | 2004-10-01 | 2006-04-13 | Dr. Hönle AG | Gasentladungslampe, System und Verfahren zum Härten von durch UV-Licht härtbare Materialien sowie durch UV-Licht gehärtetes Material |
US7014895B1 (en) | 2004-11-17 | 2006-03-21 | Illinois Tool Works, Inc. | Ultraviolet (UV) post cure heat transfer label, method of making and using same |
US7600471B2 (en) | 2005-05-10 | 2009-10-13 | Westby Ronald K | Hand proofer tool |
FR2890970B1 (fr) * | 2005-09-16 | 2008-03-14 | Rhodia Recherches & Tech | Procede de preparation d'un revetement silicone anti- adherent |
US20070245916A1 (en) * | 2006-04-19 | 2007-10-25 | The Diagnostic Group | Corrugated sheet fed printing process with UV curable inks |
JP2008178821A (ja) * | 2007-01-25 | 2008-08-07 | Totsuken:Kk | 紫外線硬化ニスの紫外線照射装置およびその方法 |
US8973497B2 (en) | 2007-04-24 | 2015-03-10 | Probity Engineering, Llc | Flexographic proofing tools and methods |
US8720335B2 (en) | 2007-04-24 | 2014-05-13 | Probity Engineering, Llc | Offset hand proofer tool |
US8603292B2 (en) * | 2009-10-28 | 2013-12-10 | Lam Research Corporation | Quartz window for a degas chamber |
US8584612B2 (en) * | 2009-12-17 | 2013-11-19 | Lam Research Corporation | UV lamp assembly of degas chamber having rotary shutters |
EP2353863B1 (de) * | 2010-02-02 | 2016-03-30 | Komori Corporation | Druck-/Beschichtungsverfahren- und -Vorrichtung |
JP5909039B2 (ja) * | 2010-04-06 | 2016-04-26 | 株式会社小森コーポレーション | 巻紙印刷機 |
US8492736B2 (en) | 2010-06-09 | 2013-07-23 | Lam Research Corporation | Ozone plenum as UV shutter or tunable UV filter for cleaning semiconductor substrates |
US9599397B2 (en) * | 2010-08-30 | 2017-03-21 | Ncc Nano, Llc | Light curing apparatus having a modular lamp housing |
DE202013004745U1 (de) | 2013-05-23 | 2014-08-26 | Exentis-Knowledge Ag | Anlage zur Herstellung von dreidimensionalen Siebdrucken |
JP2016007832A (ja) * | 2014-06-26 | 2016-01-18 | 株式会社東通研 | 紫外線硬化樹脂の硬化装置 |
DE102015107129B3 (de) * | 2015-05-07 | 2016-07-07 | Heraeus Noblelight Gmbh | Vorrichtung zum Aushärten einer Beschichtung auf einer Innenwandung eines Kanals mit ovalem Querschnitt |
JP6464963B2 (ja) * | 2015-08-26 | 2019-02-06 | ウシオ電機株式会社 | 紫外線硬化型塗料のキュアリング方法 |
CN111212791B (zh) * | 2017-10-31 | 2022-02-25 | 宝洁公司 | 侧角撑小袋 |
US12035426B1 (en) * | 2019-12-09 | 2024-07-09 | John D. Corsaut | System, method and apparatus for application of infrared radiation |
US11433690B2 (en) * | 2020-05-04 | 2022-09-06 | Macdermid Graphics Solutions, Llc | Method of making a film negative |
CN112708165A (zh) * | 2020-12-17 | 2021-04-27 | 东莞市祐铭自动化科技有限公司 | 冷光源uv照射机 |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3713864A (en) * | 1971-01-06 | 1973-01-30 | Inmont Corp | Method of printing or coating using actinic radiation setting of applied coating and coated product |
US3840448A (en) * | 1972-06-26 | 1974-10-08 | Union Carbide Corp | Surface curing of acrylyl or methacrylyl compounds using radiation of 2,537 angstroms |
US4215167A (en) * | 1975-05-22 | 1980-07-29 | Union Carbide Corporation | Ink and coating compositions and method |
US4411931A (en) * | 1982-09-29 | 1983-10-25 | Armstrong World Industries, Inc. | Multiple step UV curing process for providing accurately controlled surface texture |
EP0232545A2 (de) * | 1985-12-27 | 1987-08-19 | Nippon Paint Co., Ltd. | Photohärtbare Zusammensetzung und gehärteter Gegenstand |
EP0517929A1 (de) * | 1991-06-01 | 1992-12-16 | Heraeus Noblelight GmbH | Bestrahlungseinrichtung mit einem Hochleistungsstrahler |
EP0588534A2 (de) * | 1992-09-14 | 1994-03-23 | Hayakawa Rubber Company Limited | Strahlenhärtbare Tinte |
Family Cites Families (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1201374B (de) | 1959-02-20 | 1965-09-23 | Miehle Goss Dexter Inc | Verfahren zur Herstellung einer bei UV-Bestrah-lung und bei Anwesenheit eines Katalysators schnell haertenden Druckfarbe, die ein trocknendes Konjugenoel mit mindestens 30% ungesaettigten Doppelbindungen enthaelt |
DE1771667B2 (de) | 1968-06-22 | 1974-10-17 | Buettner-Schilde-Haas Ag, 4150 Krefeld | UV-Strahler für Trockner für lackbeschichtete Werkstücke |
US3930064A (en) * | 1970-04-22 | 1975-12-30 | Conrad Sander | Method for curing a coating on a base |
US4125678A (en) * | 1973-09-07 | 1978-11-14 | The Sherwin-Williams Company | Radiation polymerizable compositions |
US4025548A (en) * | 1974-02-04 | 1977-05-24 | The O'brien Corporation | Radiation curable oligomers |
US3903322A (en) * | 1974-03-07 | 1975-09-02 | Continental Can Co | Photopolymerizable ethylenically unsaturated compounds photoinitiated with benzoyl derivatives of diphenyl sulfide and an organic amine compound |
DE2510379A1 (de) * | 1975-03-10 | 1976-09-30 | Patra Patent Treuhand | Quecksilberdampfniederdruckentladungslampe mit amalgam |
EP0006206B1 (de) * | 1978-06-21 | 1982-11-24 | Teijin Limited | Melamingruppen enthaltende Acrylate und/oder Methacrylate, diese enthaltende polymerisier- und vernetzbare Zusammensetzungen, daraus erhaltene Formkörper sowie Formkörper, die mit den polymerisierten und vernetzten Zusammensetzungen überzogen sind |
US4309452A (en) * | 1980-10-01 | 1982-01-05 | Gaf Corporation | Dual gloss coating and process therefor |
JPS5943015A (ja) * | 1982-09-02 | 1984-03-09 | Toyobo Co Ltd | 硬化型樹脂組成物 |
DE3479878D1 (en) * | 1984-01-05 | 1989-11-02 | Toyo Boseki | Transfer paper for decorating pottery |
US4959178A (en) * | 1987-01-27 | 1990-09-25 | Advanced Products Inc. | Actinic radiation-curable conductive polymer thick film compositions and their use thereof |
US4933123A (en) * | 1987-06-29 | 1990-06-12 | Material Engineering Technology Laboratory, Incorporated | Surface treatment method |
DE3902643A1 (de) | 1989-01-30 | 1990-12-13 | Metz Luft Und Trocknungsanlage | Uv-strahler |
JPH0365541A (ja) | 1989-08-01 | 1991-03-20 | Nippon Zeon Co Ltd | 合せガラスの製造方法 |
DE4301718A1 (de) | 1993-01-22 | 1994-07-28 | Jochen Dipl Ing Hagedorn | UV-Bestrahlungseinrichtung |
US5623023A (en) * | 1995-05-23 | 1997-04-22 | Taiyo Ink Manufacuturing Co., Ltd. | Curable compositions which release imidazole upon irradiation |
DE69704969T2 (de) * | 1996-02-20 | 2002-04-04 | Asahi Kasei K.K., Osaka | Verfahren zur Herstellung einer photoempfinflichen Kunstoffdruckplatte |
US5863963A (en) * | 1996-08-29 | 1999-01-26 | Xerox Corporation | Halomethylated high performance curable polymers |
US5840788A (en) * | 1997-06-20 | 1998-11-24 | Acushnet Company | Ultraviolet light resistant urethane top coat for golf balls |
-
1996
- 1996-04-25 EP EP96914049A patent/EP0822902B1/de not_active Expired - Lifetime
- 1996-04-25 JP JP8532094A patent/JPH11509788A/ja active Pending
- 1996-04-25 US US08/945,614 patent/US6280801B1/en not_active Expired - Fee Related
- 1996-04-25 WO PCT/DE1996/000767 patent/WO1996033872A1/de active IP Right Grant
- 1996-04-25 DE DE59604303T patent/DE59604303D1/de not_active Expired - Fee Related
-
2001
- 2001-02-20 US US09/789,053 patent/US20010009701A1/en not_active Abandoned
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3713864A (en) * | 1971-01-06 | 1973-01-30 | Inmont Corp | Method of printing or coating using actinic radiation setting of applied coating and coated product |
US3840448A (en) * | 1972-06-26 | 1974-10-08 | Union Carbide Corp | Surface curing of acrylyl or methacrylyl compounds using radiation of 2,537 angstroms |
US4215167A (en) * | 1975-05-22 | 1980-07-29 | Union Carbide Corporation | Ink and coating compositions and method |
US4411931A (en) * | 1982-09-29 | 1983-10-25 | Armstrong World Industries, Inc. | Multiple step UV curing process for providing accurately controlled surface texture |
EP0232545A2 (de) * | 1985-12-27 | 1987-08-19 | Nippon Paint Co., Ltd. | Photohärtbare Zusammensetzung und gehärteter Gegenstand |
EP0517929A1 (de) * | 1991-06-01 | 1992-12-16 | Heraeus Noblelight GmbH | Bestrahlungseinrichtung mit einem Hochleistungsstrahler |
EP0588534A2 (de) * | 1992-09-14 | 1994-03-23 | Hayakawa Rubber Company Limited | Strahlenhärtbare Tinte |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0930104A2 (de) * | 1997-12-09 | 1999-07-21 | Bush Industries, Inc. | Verfahren und Vorrichtung zum Vernetzen und Härten von Lack |
EP0930104B1 (de) * | 1997-12-09 | 2005-04-06 | Bush Industries, Inc. | Verfahren und Vorrichtung zum Vernetzen und Härten von Lack |
DE10238253B4 (de) * | 2002-08-21 | 2007-12-13 | Advanced Photonics Technologies Ag | UV-Bestrahlungsanlage zur Erzeugung eines ausgedehnten UV-Strahlungsfeldes |
WO2019042622A1 (de) * | 2017-09-04 | 2019-03-07 | Krones Ag | Behandlungseinheit für behälter |
CN115107392A (zh) * | 2021-03-17 | 2022-09-27 | 海德堡印刷机械股份公司 | 在印刷机中借助经不同操控的气体放电灯硬化涂层的方法 |
Also Published As
Publication number | Publication date |
---|---|
US6280801B1 (en) | 2001-08-28 |
DE59604303D1 (de) | 2000-03-02 |
EP0822902B1 (de) | 2000-01-26 |
EP0822902A1 (de) | 1998-02-11 |
JPH11509788A (ja) | 1999-08-31 |
US20010009701A1 (en) | 2001-07-26 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO1996033872A1 (de) | Verfahren und vorrichtung zum härten von uv-druckfarben | |
RU2314926C2 (ru) | Способ и устройство для флексографской печати отверждаемыми энергией жидкими красками | |
DE69728696T2 (de) | Organische Elektrolumineszenzanzeige und Verfahren zu deren Herstellung durch thermische Übertragung | |
US4010374A (en) | Ultraviolet light processor and method of exposing surfaces to ultraviolet light | |
EP1328469B1 (de) | Verfahren und vorrichtung zur erzeugung von singulett-sauerstoff | |
Senich et al. | Radiation curing of coatings | |
US20070289459A1 (en) | Wet trapping method | |
EP0222060A2 (de) | Vorrichtung zur Behandlung von Materie durch UV-Strahlen | |
EP1310381A2 (de) | Bahnförmige Materialien mit Oberflächenstruktur, Verfahren zu deren Herstellung und deren Verwendung | |
CN1101316C (zh) | 色卡的制作方法 | |
CN1009346B (zh) | 高分子涂料的激光化学固化方法 | |
WO2020260484A1 (de) | Haltevorrichtung für ein optisches modul mit mindestens einem federelement | |
Stowe | Advances in long-life industrial UV curing lamps | |
WO2023098990A1 (de) | Verfahren zur herstellung von beschichtungen auf substraten durch uv-härtung von strahlenhärtbaren lacken und druckfarben und verwendung dieses verfahrens | |
DE3037006A1 (de) | Verfahren zum aushaerten lichtempfindlicher harzschichten | |
JPH03202176A (ja) | 化粧シートおよびその製造方法 | |
Stowe | High-power UV lamps for industrial UV curing applications | |
JPH0422673A (ja) | 転写方法及びその方法を用いたカラーフィルターの製造方法 | |
KR20080070096A (ko) | 유리 인쇄용 프라이머 조성물 | |
RQDllCIIQ | Ultraviolet curing technology and recent advances | |
JPS6112503B2 (de) | ||
DE102004048005A1 (de) | Gasentladungslampe, System und Verfahren zum Härten von durch UV-Licht härtbare Materialien sowie durch UV-Licht gehärtetes Material | |
KR19980082142A (ko) | 자외선 경화형 도료 또는 인쇄잉크의 도막면에 불규칙자연무늬를 형성시키는 방법 | |
Davison | Cost Effective Screen Printing | |
ENERGY | UV Curing |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): CN JP US |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): AT BE CH DE DK ES FI FR GB GR IE IT LU MC NL PT SE |
|
DFPE | Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101) | ||
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
ENP | Entry into the national phase |
Ref country code: JP Ref document number: 1996 532094 Kind code of ref document: A Format of ref document f/p: F |
|
WWE | Wipo information: entry into national phase |
Ref document number: 1996914049 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 08945614 Country of ref document: US |
|
WWP | Wipo information: published in national office |
Ref document number: 1996914049 Country of ref document: EP |
|
WWG | Wipo information: grant in national office |
Ref document number: 1996914049 Country of ref document: EP |