EP1800327A2 - Gasentladungslampe, system und verfahren zum härten von durch uv-licht härtbare materialien sowie durch uv-licht gehärtetes material - Google Patents
Gasentladungslampe, system und verfahren zum härten von durch uv-licht härtbare materialien sowie durch uv-licht gehärtetes materialInfo
- Publication number
- EP1800327A2 EP1800327A2 EP05802402A EP05802402A EP1800327A2 EP 1800327 A2 EP1800327 A2 EP 1800327A2 EP 05802402 A EP05802402 A EP 05802402A EP 05802402 A EP05802402 A EP 05802402A EP 1800327 A2 EP1800327 A2 EP 1800327A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- gas
- gas discharge
- tube
- discharge lamp
- inert
- 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.)
- Withdrawn
Links
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 31
- 230000005855 radiation Effects 0.000 claims description 29
- 150000001875 compounds Chemical class 0.000 claims description 23
- 229910052786 argon Inorganic materials 0.000 claims description 18
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 15
- 239000000203 mixture Substances 0.000 claims description 13
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 12
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 claims description 10
- 229910052753 mercury Inorganic materials 0.000 claims description 9
- 239000001569 carbon dioxide Substances 0.000 claims description 7
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
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- 150000008064 anhydrides Chemical class 0.000 description 2
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- NJWGQARXZDRHCD-UHFFFAOYSA-N 2-methylanthraquinone Chemical compound C1=CC=C2C(=O)C3=CC(C)=CC=C3C(=O)C2=C1 NJWGQARXZDRHCD-UHFFFAOYSA-N 0.000 description 1
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
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- OFOBLEOULBTSOW-UHFFFAOYSA-N Propanedioic acid Natural products OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 1
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- 150000001412 amines Chemical class 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- PYKYMHQGRFAEBM-UHFFFAOYSA-N anthraquinone Natural products CCC(=O)c1c(O)c2C(=O)C3C(C=CC=C3O)C(=O)c2cc1CC(=O)OC PYKYMHQGRFAEBM-UHFFFAOYSA-N 0.000 description 1
- 150000004056 anthraquinones Chemical class 0.000 description 1
- RJGDLRCDCYRQOQ-UHFFFAOYSA-N anthrone Chemical compound C1=CC=C2C(=O)C3=CC=CC=C3CC2=C1 RJGDLRCDCYRQOQ-UHFFFAOYSA-N 0.000 description 1
- 238000003491 array Methods 0.000 description 1
- 239000012298 atmosphere Substances 0.000 description 1
- 229960002130 benzoin Drugs 0.000 description 1
- RWCCWEUUXYIKHB-UHFFFAOYSA-N benzophenone Chemical compound C=1C=CC=CC=1C(=O)C1=CC=CC=C1 RWCCWEUUXYIKHB-UHFFFAOYSA-N 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
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- 150000002118 epoxides Chemical class 0.000 description 1
- UYMKPFRHYYNDTL-UHFFFAOYSA-N ethenamine Chemical class NC=C UYMKPFRHYYNDTL-UHFFFAOYSA-N 0.000 description 1
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- 229910010272 inorganic material Inorganic materials 0.000 description 1
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- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 description 1
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/30—Vessels; Containers
- H01J61/302—Vessels; Containers characterised by the material of the vessel
-
- 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
- B41M7/0045—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock using protective coatings or film forming compositions cured by mechanical wave energy, e.g. ultrasonics, cured by electromagnetic radiation or waves, e.g. ultraviolet radiation, electron beams, or cured by magnetic or electric fields, e.g. electric discharge, plasma
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/12—Selection of substances for gas fillings; Specified operating pressure or temperature
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/12—Selection of substances for gas fillings; Specified operating pressure or temperature
- H01J61/16—Selection of substances for gas fillings; Specified operating pressure or temperature having helium, argon, neon, krypton, or xenon as the principle constituent
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/12—Selection of substances for gas fillings; Specified operating pressure or temperature
- H01J61/18—Selection of substances for gas fillings; Specified operating pressure or temperature having a metallic vapour as the principal constituent
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/12—Selection of substances for gas fillings; Specified operating pressure or temperature
- H01J61/18—Selection of substances for gas fillings; Specified operating pressure or temperature having a metallic vapour as the principal constituent
- H01J61/20—Selection of substances for gas fillings; Specified operating pressure or temperature having a metallic vapour as the principal constituent mercury vapour
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/30—Vessels; Containers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/70—Lamps with low-pressure unconstricted discharge having a cold pressure < 400 Torr
- H01J61/72—Lamps with low-pressure unconstricted discharge having a cold pressure < 400 Torr having a main light-emitting filling of easily vaporisable metal vapour, e.g. mercury
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J65/00—Lamps without any electrode inside the vessel; Lamps with at least one main electrode outside the vessel
- H01J65/04—Lamps in which a gas filling is excited to luminesce by an external electromagnetic field or by external corpuscular radiation, e.g. for indicating plasma display panels
- H01J65/042—Lamps in which a gas filling is excited to luminesce by an external electromagnetic field or by external corpuscular radiation, e.g. for indicating plasma display panels by an external electromagnetic field
- H01J65/044—Lamps in which a gas filling is excited to luminesce by an external electromagnetic field or by external corpuscular radiation, e.g. for indicating plasma display panels by an external electromagnetic field the field being produced by a separate microwave unit
Definitions
- the invention relates to a gas discharge lamp for curing UV-curable materials according to claim 1, a system for curing UV-curable materials according to claim 13, a method for curing UV-curable materials according to claim 25 and a by UV light-cured material according to claim 35.
- UV curing materials have become widely established in some areas, and UV curing is becoming increasingly important in other areas.
- UV-curable especially pigmented and thick-layered materials
- long-wave UV radiation of 320-380 nm and visible light between 380-450 nm
- short-wave radiation between 200-320 nm for surface hardening and to reduce oxygen inhibition used.
- the curing of pigmented and thick-layered systems is preferably carried out here with photoinitiators which absorb in the visible range> 400 nm.
- photoinitiators which absorb in the visible range> 400 nm.
- Shortwave emitters As excimer laser with a wavelength of 172 nm, produce at the paint surface, for example in clearcoats, under inert conditions or in a vacuum, a very thin through-hardened layer, the deeper
- Low-pressure lamps with a peak of 185nm are used exclusively for ozone generation and exclusively for photochemical purposes such.
- the UV curing is mainly used for curing 2-dimensional parts such as film and sheet goods.
- the curing of 3-dimensional parts is still a major problem and u. a. in air by installation of complex UV systems for uniform hardening at all object points or under inert conditions.
- the object is achieved by the characterized in claim 1 gas discharge lamp.
- a gas discharge lamp for curing ultraviolet curable materials comprising a filled gas tube (3) for generating a gas discharge for emitting electromagnetic radiation to less than 200nm using an inert gas device for providing an inert gas and supplying the inert gas to the surface of the material to be cured.
- a system for curing ultraviolet curable materials comprising a gas discharge lamp for emitting electromagnetic radiation to less than 200nm by means of gas discharge in a filled gas-filled tube and an inert gas device for supplying an inert gas and supplying the inert gas thereto Surface of the material to be hardened.
- the object is further achieved by the invention characterized in claim 25 method.
- a method of curing UV-curable materials comprising the steps of emitting electromagnetic radiation to below 200nm by means of a gas discharge lamp, providing an inert gas, and supplying the inert gas to the surface of the material to be cured.
- a UV-cured material is disclosed by using a gas discharge lamp for emitting electromagnetic radiation to below 200 nm by gas discharge in a filled gas tube and using an inert gas device for supplying an inert gas and supplying the inert gas to the surface of the inert gas to hardening material.
- the gas discharge lamp is a low-pressure radiator.
- the tube has a diameter of 5mm to 20mm, preferably from 10mm to 15mm, and more preferably from 12mm to 13mm.
- the tube is made of quartz glass, which transmits wavelengths below 200 nm, in particular up to 185 nm.
- the tube has a wall thickness between 0.5mm and 2mm, preferably between 0.8mm and 1.5mm, and more preferably between 1mm and 1.3mm.
- the filling gas consists of mercury and a Ne-Ar-Mi tion in the ratio of Ne 0% to 100% and / or Ar 0% to 100%, preferably Ne 0% to 50% and Ar 50% to 100% and more preferably Ne 20% to 30% and Ar 70% to 80%.
- the filling gas has a gas pressure of 0.5 mbar to 10mbar, preferably from 0.5mbar to 5mbar and more preferably from 1mbar to 3mbar.
- the gas discharge is generated by two electrodes located in the tube and controlled by a ballast connected to the electrodes.
- the ballast regulates the discharge tube temperature to 85 ° C. to 150 ° C.
- the gas discharge can also be generated by high-energy radiation, in particular radiation in the microwave range.
- the gas discharge may be e.g. also be produced in electrodeless steel systems.
- the gas discharge lamp may also be a medium-pressure radiator.
- the inert gas is a chemically inert, gaseous compound, preferably argon, nitrogen or carbon dioxide.
- Figure 1 is a schematic representation of a gas discharge lamp
- FIG. 2 shows the transmission of different types of quartz.
- FIG. 1 shows a schematic representation of a gas discharge lamp 1.
- the gas discharge lamp 1 consists of a vacuum-tight tube 4 with a filling gas 3 with a predetermined filling gas pressure in which the gas discharge takes place, and usually two metallic electrodes 2, which are melted into the tube 4.
- An electrode 2 supplies the electrons for the discharge, which are supplied via the second electrode 2 again to the external circuit.
- the emission of the electrons is usually by means of annealing emission (hot electrodes), but can also be caused by emission in a strong electric field or directly by ion impact (ion-induced secondary emission) (cold electrodes).
- the electrodes can of course also electrodeless emitter units 1 are used, which are characterized by high-energy radiation such. B. microwaves are ignited.
- the gas discharge lamp 1 has for operation via a ballast 5, which is connected to the electrodes and ignites the gas discharge in the Gasentladunslampe 1 and supplies a ballast for the operation of the lamp on a circuit. Without a suitable current limit of the gas discharge lamp 1 in an outer
- Circuit would increase the current in the gas discharge lamp 1 by increasing the
- UV curable materials can be paints, inks, adhesives, potting compounds or the like.
- both low-pressure lamps and medium-pressure lamps can be used. These are optimized in accordance with the invention such that the wavelength below 200 nm, in particular the wavelength 185 nm, is emitted with particularly high efficiency. Disadvantage of medium-pressure lamps is also here that they produce a large amount of heat, which requires intensive cooling; As a result, they can not be such. As low-pressure radiator in the filled with inert gas space of a curing system are introduced, since the intensive ventilation, the ReSt-O 2 - concentration increases very quickly to 20%, but they must be externally attached to a curing device.
- Mercury low-pressure discharge lamps are radiation sources that generate radiation in their plasma discharge by the impact ionization processes with the mercury atoms. This radiation is spectrally distributed from ultraviolet to infrared. The most intense radiation components are in marked contrast to the medium-pressure radiators essentially at the wavelengths of 254nm and 185nm. The smaller the diameter of the tube 4, the higher the 185 nm yield. Optimally, the tube 4 has a diameter of 5mm to 20mm, preferably from 10mm to 15mm and more preferably from 12mm to 13mm, with a diameter of 12mm to 13mm also from a production point of view is optimal.
- the tube 4 has a wall thickness between 0.5mm and 2mm, preferably between 0.8mm and 1.5mm, and more preferably between 1mm and 1.3mm.
- the filling gas 3 of the low-pressure radiator may be a mercury and Ar filling or a mercury and noble gas mixture such as Ar-Kr and Ar-Ne.
- the noble gas mixtures Ar-Kr and Ar-Ne show a higher 185 nm yield than the pure Ar filling.
- the noble gas mixture Ne-Ar has proved to be optimal with a ratio of Ne 0% to 100% and / or Ar 0% to 100%, preferably Ne 0% to 50% and Ar 50% to 100%, particularly preferably Ne 20 % to 30% and Ar 70% to 80%.
- the 185 nm yield can be increased by reducing the gas pressure.
- the filling gas 3 has a gas pressure of 0.5 mbar to lOmbar and preferably from 0.5 mbar to 5 mbar. However, since values of less than 2 mbar gas pressure result in a reduction in the intensity of the 185 nm peak, the optimum gas pressure of the filling gas 3 is 2 mbar to 3 mbar.
- FIG. 2 shows the transmission of different types of quartz for UV lamps.
- the percentage transmission as a function of the wavelength in nanometers is graphically plotted for different types of quartz.
- only certain types of quartz transmit wavelengths of less than 200 nm and in particular wavelengths of 185 nm.
- Transmittances at 185nm are shown by rock crystal and the synthetic quartz “Suprasil” Furthermore, the 185nm yield is increased by the use of tubes 4 with a small wall thickness.
- the emission of the 185nm line increases with increasing temperature of the radiator up to values around 150 ° C.
- the emission decreases significantly due to the onset of self-absorption of the mercury resonance line. This requires that the radiator is not heated continuously by a constant lamp current and thus the radiation intensity maxima runs through, but that its tube wall temperature can be kept constant by controlling the lamp current to the desired value. Thus, the radiation intensity can be kept constant.
- the gas discharge lamp 1 therefore has a ballast 5, which regulates the lamp power supply.
- a particularly high 185nm yield in the range of 85 ° C to 150 ° C resulted.
- the 185 nm yield decreases again, with a reduction in the filling pressure of the broad maximum range is reduced and the 185 nm yield at higher temperatures decreases much steeper again.
- Operating point at IA gives 150% efficiency over a conventional synthetic quartz emitter.
- the determined powers of the 185 nm radiation are in the range between 2 and 3 watts.
- the ballast 5 is adjustable in its current in a wide range from a basic value by + 50%, d. H. for the low-pressure radiator according to the invention of 0.9A ⁇ 50% (0.45 A to 1.35 A). For other radiator types, the corresponding basic values can then be adapted by simply exchanging two reactors and one capacitor.
- the current setting in the ⁇ 50% range can be done manually by a potentiometer or via a voltage interface remote controlled. In the case of the ballast 5 according to the invention, this voltage interface is controlled via a comparator circuit, which compares the pipe wall temperature with a setpoint temperature, or the current is set with voltage fixed values.
- the tube 4 of the gas discharge lamp 1 can have a wide variety of geometries (meandering, curved or helical). Optimum utilization of the generated radiation is given in a cylindrical shape. While other geometries interact with each other by self-picking up some of the generated radiation, the 185 nm yield is still high.
- the tube 4 optimally has a length of 10 to 3000 mm and a tube diameter of about 16 to 28 mm.
- the discharge tube temperature is approximately between 700 ° C and 900 ° C.
- a quartz glass is again taken, which transmits wavelengths of less than 200 nm, in particular of 185 nm.
- the curing process takes place under an inert gas (inert gas).
- An inert gas device serves to provide the inert gas and supply the inert gas to the surface of the material to be cured.
- inert gases any chemical inert gaseous compounds can be used such.
- Noble gases such as helium or argon; but it can also z.
- nitrogen or carbon dioxide are used as inert gas.
- Carbon dioxide can z. B. be used in the form of dry ice or gaseous.
- the inerting process uses a residual O 2 concentration of between 0.0001 and 10%, preferably between 0.3 and 3%.
- UV-curable materials consist essentially of photoinitiators, prepolymers (precrosslinked basic building blocks), monomers (basic building blocks as reactive diluents used), additives, fillers, dyes and / or pigments.
- photoinitiators prepolymers (precrosslinked basic building blocks), monomers (basic building blocks as reactive diluents used), additives, fillers, dyes and / or pigments.
- (meth) acrylate compounds such as polyester (meth) acrylates, polyether (meth) acrylates, urethane (meth) acrylates, epoxy (meth) acrylates,
- Silicone (meth) acrylates acrylated polyacrylates. At least 40 mol%, more preferably at least 60% of the radiation-curable ethylenically unsaturated groups, are preferably (meth) acrylic groups.
- the radiation-curable compounds may contain further reactive groups, eg. As melamine, isocyanate, epoxy, anhydride, alcohol, carboxylic acid groups for additional thermal curing, eg. B. by chemical reaction of alcohol, Carboxylic acid, amine, epoxide, anhydride, isocyanate or melamine groups (dual eure).
- further reactive groups eg. As melamine, isocyanate, epoxy, anhydride, alcohol, carboxylic acid groups for additional thermal curing, eg. B. by chemical reaction of alcohol, Carboxylic acid, amine, epoxide, anhydride, isocyanate or melamine groups (dual eure).
- the radiation-curable compounds may, for. B. as a solution, for. B. in an organic solvent or water, as an aqueous dispersion or emulsion, as a powder or as a liquid 100% material.
- the radiation-curable compounds and thus also the radiation-curable compositions are preferably free-flowing at room temperature.
- the radiation-curable compositions preferably contain less than 20% by weight, in particular less than 10% by weight, of organic solvents and / or water. They are preferably solvent-free and anhydrous (100% solids).
- the radiation-curable compositions may contain other constituents in addition to the radiation-curable compounds as a binder.
- a binder In consideration come z.
- pigments As pigments, flow control agents, dyes, stabilizers, etc.
- photoinitiators For curing with UV light commercially available photoinitiators are generally used.
- Suitable photoinitiators z. As benzophenone, alkylbenzophenones, hologenmethyl Of benzophenones, Michler's ketone, anthrone and halogenated benzophenones. Further common photoinitiators are ⁇ -hydroxiketones, ⁇ -amino ketones, thioxanthones and methylbenzoyl formate (MBF). Benzoin and its derivatives are also suitable.
- photoinitiators are anthraquinone and many of its derivatives, for example, ⁇ -methylanthraquinone, tert-butylanthraquinone and Anthrachinoncarbonsärueester and, particularly effective, photoinitiators with a Acylphosphinoxidgruppy as Acylphosphinoxide or Bisacylphosphinoxide, z. B. 2,4,6-Trimethylbenzoldiphenylphosphinoxid (Lucirin® TPO).
- the radiation-curable compositions contain less than 10 parts by weight, in particular less than 4 parts by weight, more preferably less than 1.5 parts by weight of photoinitiator per 100 parts by weight of radiation-susceptible compounds.
- the proposed gas discharge lamp 1 in conjunction with the inert gas device is suitable both for the curing of free-radical and cationic lacquers, printing inks, adhesives or casting compounds.
- this process can be used Layer thicknesses up to> 40 microns are cured. Clearcoats or filled systems can also be easily cured in layer thicknesses of up to 2000 ⁇ m. It has been shown that lacquer systems which contain UV absorbers to increase the UV and weathering resistance, in layer thicknesses> 100 .mu.m and highly pigmented white systems with z. As titanium dioxide as a pigment, can be cured easily.
- the distance between the gas discharge lamp 1 in this method can be between 1 cm and> 18 cm from the substrate surface. It can be used to cure the paints, printing inks, adhesives and potting compounds one or more radiators or radiator arrays. Due to the low heat emission of the radiators, the coated and hardened substrate, apart from the heat of reaction, heats only insignificantly.
- radiator units 1 Another application is the pretreatment of substrates to improve substrate adhesion;
- the surface of the substrate is irradiated under inert conditions with one or more radiator units 1 and "activated", which results in an increase in the surface tension of the substrate.
- Adhesives or potting compounds react and produce a chemical bond between the substrate and the coating, and the coating material can subsequently be cured under inert conditions with one or more other radiator units 1.
- the substrate pretreated with one or more UV emitter units 1 under inert conditions may be pretreated with a photoactive "UV primer"; a chemical bond is formed between substrate and primer; This effect can be further improved by a further UV irradiation step with one or more emitter unit (s) 1 under inert conditions.
- a chemical bond between primer and coating material is now produced.
- the UV curing in the subsequent primer and coating steps can also be carried out with conventional medium-pressure lamps in air after the pretreatment step with emitter unit (s) 1 under inert conditions.
- emitter unit (s) 1 Another application of the emitter unit 1 is in the field of sterilization, sterilization and / or disinfection of substrate surfaces.
- Another application of the emitter unit 1 is the production of dull and dull matt surfaces.
- An advantage of the system and method according to the invention lies in the low temperature development in the UV curing, since little energy is introduced through the low-pressure radiator. This is particularly significant in the coating of temperature-sensitive substrates such as plastics, paper, wood, etc. Furthermore, low-pressure radiators have a significantly lower energy consumption compared to medium-pressure radiators, resulting in reduced energy costs. Furthermore, any possible geometry can be reproduced by the gas discharge lamps according to the invention, that is, the lamp can be meandering or U-shaped, which can be adapted optimally to the surface for curing in objects with a curved surface. Furthermore, the curing of clearcoats and pigmented systems in a much shorter time is possible.
- the hardening of thick layers can also be carried out with the gas discharge lamp under inert gas according to the invention. Due to the low temperature development in the low-pressure radiator, the requirement of cooling the radiator falls away, whereby the design complexity is reduced and the handling of the radiator is simplified because, for example, a radiator change without waiting for cooling is possible. Due to the reduced design effort and the system costs are reduced. Furthermore, the pretreatment of substrates is possible. In addition, the spotlight can still be used for sterilization and disinfection and the curing of both radical and cationic curing systems and UV-stabilized paints is possible. It is also possible to bond UV-transparent substrates (cationic and free-radical) and non-transparent substrates with cationic adhesives. Another application is the matting and curing of pigmented systems.
- the process can be carried out under inert conditions, for example for the finishing of sheet-like materials such as paper, films or sheets for printing, coating and lamination of two- and three-dimensional bodies as well as for the refinement of 3-dimensional solids in stationary or continuous operation.
- the same varnish is filled in an aluminum lid (SD approx. 3 mm).
- the mass is completely cured, the surface scratch resistant; It has formed a soft, about 3 mm thick polymer.
- a clear coat consisting of 100 g of Laromer® PO 84 F (BASF), 5.0 g of Tinuvin® 1130 (Ciba SC) as UV absorber and 2.0 g of Darocur® MBF (Ciba SC) as photoinitiator was applied to a white cardboard (SD about 12 microns) and introduced into a UVACube inert. It was cured with 2 spotlights at a distance from the radiator of about 6 cm (residual O 2 concentration 1.4%). After 2 s exposure time, the material is completely cured as a high-gloss, scratch-resistant film. In the KMnO 4 -TeSt held against white paper, a minimal coloration of the film can be seen.
- the same paint is applied in a layer thickness of about 40 microns on a white cardboard.
- the film is fully cured, the high gloss surface is absolutely scratch resistant and. After an exposure time of 10 s, the film is not fully cured.
- the same paint is applied in a layer thickness of about 100 microns on a white cardboard.
- the film is completely cured, the high-gloss surface is absolutely scratch-resistant.
- the same paint is applied in a layer thickness of about 100 microns on a white cardboard.
- the film is completely cured, the high-gloss surface is absolutely scratch-resistant.
- a white, highly pigmented inkjet ink is applied to white cardboard in an SD of 12 ⁇ m and introduced into a UVACube inert. Then, at a distance to the radiator of about 6 cm ⁇ 2s with 2 radiators exposed (residual O 2 - concentration - 1.4%). The material is fully cured and shows a shiny surface.
- the material is not yet cured after an exposure time of 90 s.
- UV curing is carried out under the same conditions with a "normal" UV low-pressure emitter made of synthetic quartz, the material is only hardened after 10 s and has a matte surface, clearly showing the effect of the emitter with the increased emission at 185 nm.
- the material is only cured after an exposure time of 90 s and shows a structured surface.
- UV curing is carried out under the same conditions with a "normal" UV low-pressure emitter made of synthetic quartz, the material is only cured after 10 s and has a matte surface. This clearly shows the effect of the emitter with the increased emission at 185 nm.
- the material is only cured after an exposure time of 90 s and has a glossy surface.
- UV curing is carried out under the same conditions with a "normal" UV low-pressure emitter made of synthetic quartz, the material is only hardened after 5 s and has a matte surface, clearly showing the effect of the emitter with the increased emission at 185 nm.
- UV curing is carried out under the same conditions with a "normal" UV low-pressure emitter made of synthetic quartz, the material is only after 5 s cured and has a slightly frosted surface. This clearly shows the effect of the emitter with the increased emission at 185 nm.
- UV curing is carried out with amalgam lamps (normal quartz) under the same conditions, the material is only cured after an exposure time of 90 s and has a matte surface. If UV curing is carried out under the same conditions with a "normal" UV low-pressure emitter made of synthetic quartz, the material is only cured after 10 s and has a matte surface.
- the material is fully cured after 10 s and shows a shiny surface.
- a magenta-colored, highly pigmented flexo ink is applied to white cardboard in an SD of 12 ⁇ m and introduced into a UVACube inert. Then, at a distance of approx. 6 cm, 20 seconds are irradiated with 2 beams (ReSt-O 2 -
- the material is fully cured after 10 s and shows a shiny surface.
- a commercially available PMMA plate is exposed for approx. 10 s at a distance of approx. 6 cm to the spotlight with 2 optimized low-pressure lamps.
- the surface tension of the plastic changes from approx. 38 Nm / m to approx. 46 Nm / m. After about 20 s of irradiation, surface tension values> 50 Nm / m are achieved. If one applies to the thus treated surface a e.g. free radical curable UV varnish, it shows good adhesion to the substrate, while adhesion to the untreated PMMA is not given.
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- General Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Health & Medical Sciences (AREA)
- Mechanical Engineering (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Vessels And Coating Films For Discharge Lamps (AREA)
- Surface Treatment Of Glass Fibres Or Filaments (AREA)
- Discharge Lamps And Accessories Thereof (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
- Discharge Lamp (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102004048005A DE102004048005A1 (de) | 2004-10-01 | 2004-10-01 | Gasentladungslampe, System und Verfahren zum Härten von durch UV-Licht härtbare Materialien sowie durch UV-Licht gehärtetes Material |
| PCT/EP2005/010609 WO2006037578A2 (de) | 2004-10-01 | 2005-09-30 | Gasentladungslampe, system und verfahren zum härten von durch uv-licht härtbare materialien sowie durch uv-licht gehärtetes material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP1800327A2 true EP1800327A2 (de) | 2007-06-27 |
Family
ID=36088716
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP05802402A Withdrawn EP1800327A2 (de) | 2004-10-01 | 2005-09-30 | Gasentladungslampe, system und verfahren zum härten von durch uv-licht härtbare materialien sowie durch uv-licht gehärtetes material |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20080105830A1 (de) |
| EP (1) | EP1800327A2 (de) |
| JP (1) | JP2008521162A (de) |
| DE (1) | DE102004048005A1 (de) |
| WO (1) | WO2006037578A2 (de) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5493100B2 (ja) * | 2008-12-04 | 2014-05-14 | 株式会社オーク製作所 | 放電ランプ |
| 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 |
| GB201909315D0 (en) * | 2019-06-28 | 2019-08-14 | Ge Healthcare Bio Sciences Ab | Improvements in and relating to steriliasation of fluid-guiding elements |
Family Cites Families (28)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2362385A (en) * | 1942-11-13 | 1944-11-07 | Jules L Libby | Germicidal lamp |
| US3819970A (en) * | 1972-12-27 | 1974-06-25 | Gte Sylvania Inc | Low pressure ultraviolet lamp |
| US3921032A (en) * | 1973-11-02 | 1975-11-18 | Gen Electric | Thermal regulator ballast |
| US4074166A (en) * | 1976-11-19 | 1978-02-14 | Gte Sylvania Incorporated | Ultraviolet emitting arc discharge lamp |
| US4594724A (en) * | 1984-02-10 | 1986-06-10 | Prime Computer, Inc. | Bypass method and apparatus for debouncing a mechanical switching element in a data communications network |
| JPS60191038A (ja) * | 1984-03-07 | 1985-09-28 | Oak Seisakusho:Kk | 紫外線照射装置 |
| KR920007954B1 (ko) * | 1985-07-15 | 1992-09-19 | 시티즌 도께이 가부시기가이샤 | 자외선 조사(照射) 접착장치 |
| US5173638A (en) * | 1986-07-22 | 1992-12-22 | Bbc Brown, Boveri Ag | High-power radiator |
| US4933602A (en) * | 1987-03-11 | 1990-06-12 | Hitachi, Ltd. | Apparatus for generating light by utilizing microwave |
| DE4010190A1 (de) * | 1990-03-30 | 1991-10-02 | Asea Brown Boveri | Bestrahlungseinrichtung |
| CH680099A5 (de) * | 1990-05-22 | 1992-06-15 | Asea Brown Boveri | |
| JPH04109952A (ja) * | 1990-08-31 | 1992-04-10 | Toshiba Lighting & Technol Corp | 紫外線照射装置 |
| DE4133290A1 (de) * | 1991-10-08 | 1993-04-15 | Herberts Gmbh | Verfahren zur herstellung von mehrschichtlackierungen unter verwendung von radikalisch und/oder kationisch polymerisierbaren klarlacken |
| DE59604303D1 (de) * | 1995-04-27 | 2000-03-02 | Metronic Geraetebau | Verfahren und vorrichtung zum härten von uv-druckfarben |
| US5832362A (en) * | 1997-02-13 | 1998-11-03 | The Procter & Gamble Company | Apparatus for generating parallel radiation for curing photosensitive resin |
| DE19740991A1 (de) * | 1997-09-18 | 1999-03-25 | Heraeus Noblelight Gmbh | Vorrichtung für die Behandlung einer Materialbahn mit UV-Strahlung |
| US6144175A (en) * | 1997-11-05 | 2000-11-07 | Parra; Jorge M. | Low-voltage ballast-free energy-efficient ultraviolet material treatment and purification system and method |
| JPH11277053A (ja) * | 1998-03-27 | 1999-10-12 | Nippon Photo Science:Kk | 紫外線照射装置 |
| US6614039B2 (en) * | 1999-06-23 | 2003-09-02 | Brad C. Hollander | Hermetically sealed ultraviolet light source |
| DE29919483U1 (de) * | 1999-11-05 | 2000-03-30 | Dr. Hönle AG, 82152 Planegg | UV-Bestrahlungsvorrichtung |
| DE19957034B4 (de) * | 1999-11-26 | 2006-04-13 | Heraeus Noblelight Gmbh | Verfahren zur Behandlung von Oberflächen von Substraten und Vorrichtung |
| JP2001332216A (ja) * | 2000-03-14 | 2001-11-30 | Toshiba Lighting & Technology Corp | 放電ランプ、光照射装置、殺菌装置、液体処理装置および空気清浄装置 |
| EP1273030A1 (de) * | 2000-03-31 | 2003-01-08 | Koninklijke Philips Electronics N.V. | Entladungslampe |
| US6599585B2 (en) * | 2001-06-08 | 2003-07-29 | Aetek Uv Systems | UV curing system for heat sensitive substances and process |
| JP3563373B2 (ja) * | 2001-06-14 | 2004-09-08 | 株式会社日本フォトサイエンス | 放電灯および紫外線照射装置並びにその運用方法 |
| JP2003144913A (ja) * | 2001-11-13 | 2003-05-20 | Ushio Inc | 誘電体バリア放電ランプによる処理装置、および処理方法 |
| DE20203303U1 (de) * | 2001-12-21 | 2003-02-27 | Dr. Hönle AG, 82152 Planegg | UV-Bestrahlungsvorrichtung zum stationären Bestrahlen in CO2 |
| DE10243577B4 (de) * | 2002-09-19 | 2008-08-07 | Eltosch Torsten Schmidt Gmbh | Bestrahlungseinrichtung und Verwendung einer solchen |
-
2004
- 2004-10-01 DE DE102004048005A patent/DE102004048005A1/de not_active Withdrawn
-
2005
- 2005-09-30 EP EP05802402A patent/EP1800327A2/de not_active Withdrawn
- 2005-09-30 WO PCT/EP2005/010609 patent/WO2006037578A2/de not_active Ceased
- 2005-09-30 JP JP2007533958A patent/JP2008521162A/ja active Pending
- 2005-09-30 US US11/664,313 patent/US20080105830A1/en not_active Abandoned
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2006037578A2 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2006037578A3 (de) | 2009-03-12 |
| DE102004048005A1 (de) | 2006-04-13 |
| WO2006037578A2 (de) | 2006-04-13 |
| US20080105830A1 (en) | 2008-05-08 |
| JP2008521162A (ja) | 2008-06-19 |
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