EP1089882B1 - Verfahren zur markierung von papieren und kartons - Google Patents
Verfahren zur markierung von papieren und kartons Download PDFInfo
- Publication number
- EP1089882B1 EP1089882B1 EP99924958A EP99924958A EP1089882B1 EP 1089882 B1 EP1089882 B1 EP 1089882B1 EP 99924958 A EP99924958 A EP 99924958A EP 99924958 A EP99924958 A EP 99924958A EP 1089882 B1 EP1089882 B1 EP 1089882B1
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- EP
- European Patent Office
- Prior art keywords
- coating
- treated
- laser energy
- printing
- paper
- 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.)
- Expired - Lifetime
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Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H25/00—After-treatment of paper not provided for in groups D21H17/00 - D21H23/00
- D21H25/04—Physical treatment, e.g. heating, irradiating
- D21H25/06—Physical treatment, e.g. heating, irradiating of impregnated or coated paper
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F1/00—Wet end of machines for making continuous webs of paper
- D21F1/44—Watermarking devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H19/00—Coated paper; Coating material
- D21H19/02—Metal coatings
- D21H19/08—Metal coatings applied as vapour, e.g. in vacuum
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H19/00—Coated paper; Coating material
- D21H19/80—Paper comprising more than one coating
- D21H19/82—Paper comprising more than one coating superposed
Definitions
- the invention relates to a method for producing a permanent Marking in the top coating of paper substrates and with This method, available in the top layer, a mark containing paper products such as paper and cardboard.
- DE-A-34 25 086 describes a method for marking prints by allowing a special form of energy to act on the printed sheet / the printed web.
- a form of energy it is modulated Laser light, visible light, infrared light, ultraviolet light or Ultrasound suggested.
- Laser light visible light, infrared light, ultraviolet light or Ultrasound suggested.
- some of the pressure at the predetermined locations is released, whereby the marking on the print results.
- the procedure is suitable especially for the creation of single copies (unique pieces) of a print.
- DE-A-3634098 describes a method for introducing Authenticity features on paper using a laser beam. It becomes a relief (Topographical) feature generated by the action of laser energy, which so It is clearly noticeable that it continues in a subsequent process step can be processed, in particular paint, paint or hardening Plastic are injected onto or into the relief line generated. The through the Relief lines formed by the laser beam are thus protected against abrasion.
- DE-A-37 10 153 describes an illustration provided with Microcapsule coated paper, e.g. Carbonless paper.
- Microcapsule coated paper e.g. Carbonless paper.
- Process for the production of this paper is first carried out with the help of Laser energy the paper substrate with an image in the sense of a Watermark.
- the surface of the Paper substrate as such a transparent microcapsule coating applied, which the image generated by laser energy covered but not darkened. So the image stays dry Micro capsule coating of the end product visible.
- the Illustration is intended to illustrate the following processes, in particular printing or Do not disturb writing on the paper.
- This object was achieved by a method for producing a marking in the uppermost coating of paper substrates in that, prior to the application of the uppermost coating, the surface of at least one of the layers arranged below the uppermost coating is laser energy with an energy density between 0.1 and less than 1 , 7 joules • cm -2 , the uppermost coating of the paper substrate being opaque and being selected from at least one printing and / or at least one varnish and / or at least one metallization or combinations thereof.
- the object is achieved by prior to applying the uppermost coating Surface of at least one of the layers arranged below the top coating treated with laser energy with an energy density of 1.7 to 5.0 Joules • cm -2 .
- the invention further relates to marked paper products which are obtainable by the methods described above.
- the nonwoven substrates which can be used as paper substrates in the process according to the invention and which can optionally be coated before the laser treatment have a mass per unit area (basis weight) of 40, preferably from 60 to 400 g / m 2 , preferably up to 300 g / m 2 ,
- Cardboard which usually has a mass per unit area of at least 150 g / m 2 , preferably at least 170 g / m 2 , is therefore also suitable for the method according to the invention.
- the terms "paper substrate” or "substrate of the paper product” used interchangeably to describe the invention thus include not only substrates of classic papers, such as writing paper, but also substrates of a cardboard-like mass corresponding to area.
- the opacity of the top coat is determined by subtracting the opacity (in percent) of an uncoated paper substrate from the opacity (in percent) of the identical but coated paper substrate.
- the determination of the opacity of the coated and uncoated paper substrates as such is carried out in accordance with DIN 53146. Areas which have not been treated with laser energy are compared.
- Such printing and / or painting and / or metallization is considered to be an opaque coating in the sense of the invention which, on conventional office paper with a mass per unit area of 80 g / m 2, has an increase in opacity of at least 5 percentage points, preferably of at least 8 percentage points causes.
- a standard paper substrate for determining the opacity of the top coating (s) a normal writing paper treated with an unpigmented starch coat was used with an opacity (uncoated) of 80-82%.
- this top coating consists of at least one Printing and / or at least one metallization and / or at least a paint job or combinations of these individual coatings can also be arranged in a different order.
- the printing is in particular known in the prior art Offset, gravure and flexographic printing processes, inkjet printing processes, laser printing processes carried out.
- the metallization of paper substrates can by the in the state of the Techniques known in the art, for example by direct or transfer processes be generated.
- Paper substrates are in particular aluminum, copper, gold and silver suitable.
- the top coating is made from a metallization selected from the above Metals. This metallization can also be printed and / or be painted.
- Metallizations customary in the context of the invention with one of the metals mentioned above have an average layer thickness of 10 to 50 nm, preferably of 15 to 30 nm and particularly preferably of 15 to 25 nm.
- Metallizations with a layer thickness of 10 nm on paper with a mass per unit area of 80 g / m 2 and an opacity of 80 - 82% already lead to an increase in opacity of over 8 percentage points compared to unmetallized paper.
- the coating of paper substrates is also state of the art known.
- the painting is due to the fact that it is appropriate Includes pigments and / or dyes, white or colored.
- the procedure is as follows: that as a paper or cardboard substrate, a non-woven fabric, one on the surface prepared nonwoven, a coated nonwoven, which optionally prepared and / or metallized below the coating can be a metallized nonwoven, which may be below the metallization can be prepared and / or coated on the surface treated with laser energy.
- the method according to the invention can also be carried out without further ado that the laser energy the still wet nonwoven fabric can take effect during the nonwoven manufacture.
- the nonwoven can be a natural nonwoven.
- the Nonwoven fabric itself can be transparent or opaque, white or colored and can be on the surface for example by an unpigmented or pigmented starch solution.
- the nonwoven fabric that may be prepared on the surface can also with an unpigmented, white or colored pigmented line be coated, which additionally densifies (satin) and, if necessary can be provided with a paint.
- a special embodiment of the method according to the invention is characterized in that the surface of a nonwoven with Treated laser energy and on the surface treated with laser energy applies at least one further coating which is selected from one Printing, painting or metallization.
- Another special embodiment is characterized in that treated the surface of the nonwoven fabric with laser energy with Metallized laser energy treated surface and then on the metallized surface applies printing and / or painting.
- the layer thickness of the metal layer and their generation is referred to the above statements.
- Metallization is preferred aluminum.
- Another special embodiment is characterized in that the metallized surface of a nonwoven fabric, optionally after Application of a varnish or printing treated with laser energy and then on the surface treated with laser energy Applying printing and / or painting.
- a varnish or printing treated with laser energy optionally after Application of a varnish or printing treated with laser energy and then on the surface treated with laser energy Applying printing and / or painting.
- Another special embodiment is characterized in that the one with an unpigmented, white or colored pigmented line provided surface of a nonwoven fabric treated with laser energy and then print on the surface treated with laser energy and / or applies a paint job.
- the stroke can be additional compacted (satin) and optionally provided with a paint.
- Another special embodiment of the method according to the invention is characterized in that the one described above Coated surface of a nonwoven fabric with laser energy treated, the surface treated with laser energy and metallized then printing on the metallized surface and / or applying a paint.
- layer thicknesses and manufacturing processes will depend on the referenced above.
- Another embodiment is characterized in that the surface of a nonwoven provided with the above-described line metallized, the metallized surface, which if necessary with a Painting or printing can be provided with laser energy treated and on the surface treated with laser energy Applying printing and / or painting.
- the surface of a nonwoven provided with the above-described line metallized, the metallized surface which if necessary with a Painting or printing can be provided with laser energy treated and on the surface treated with laser energy Applying printing and / or painting.
- Another embodiment according to the invention is characterized in that that the surface of a nonwoven fabric with laser energy treated the surface treated with laser energy with a like above defined line and then printed on this and / or applies a paint job.
- top coating i.e. in the printing, painting or metallization recognizable marking is usually around a logo, a name, a trademark, an illustration, a pattern, around a security mark or other marking which the Identification of the printed / written paper easier.
- the laser treatment for labeling or marking the substrate can according to the invention with the known raster scan or vector scan method with x-y galvanometer mirrors, polygon scanners or mask imaging processes respectively.
- Laser energy can come from a pulsed laser or a continuous wave laser (continuous laser), typically one carbon dioxide laser each to be delivered.
- Nd YAG lasers
- frequency-converted Nd YAG laser
- copper vapor laser excimer laser and diode lasers
- the laser energy is left on in each case the layer immediately below the top coating act before the top coating is applied.
- the energy density of the laser is to be set so that the image generated on the surface of the laser-treated layer is visible or at least perceptible.
- the skilled worker is aware that this is not only dependent on the type of laser (pulsed or continuous wave laser), its energy level, but also on the type of paper and its water content.
- DE-A-37 10 153 for paper with low to normal moisture contents (3 to 8% by weight) uses energy densities in the range from 1.7 to 5.0 joules • cm -2 for pulsed lasers and 2.2 to 4.8 joules • cm -2 for continuous wave lasers, depending on the web speed recommended. For papers with a higher moisture content, correspondingly higher laser energies are required.
- stretching energies (quotient of laser energy / laser scanning speed) of 3 to 12 J / m, preferably 5.5 to 8 J / m, are preferred for papers with low to normal moisture contents.
- line energies of up to 150 J / m are required.
- the energy density of the laser is to be selected such that it does not produce any visible or perceptible images on the substrate treated with it.
- the energy density is between 0.1 and less than 1.7 joules • cm -2 , but preferably between 0.1 and 1.6 joules • cm -2 , particularly preferably between 1.0 and 1.6 joules • cm -2 .
- the changes on the surface of the paper or the coating of the paper produced with these energy densities are not visible or perceptible in transmitted or reflected light, but instead only lead to the generation or visibility of a marking in the subsequent coating or coatings.
- the method according to the invention is carried out in such a way that, as described above, only the surface to be coated is modified by laser action, which is not necessarily immediately visible / perceptible, but only leads to the recognizable changes described in this top coating on the coating applied thereon ,
- the inventive method can on one or both sides of the Paper or cardboard substrates carried out independently become.
- a surface is set, which is then used for a further one Coating process, especially a metallization or Printing process compared to the laser-untreated material is changed.
- This change in the surface continues in the subsequent coating (printing, painting, metallization) and leads here to readily recognizable changes in the Color density, color location, gloss and / or reflection.
- the laser-marked layer arranged transparent coatings are such, at which the increase in opacity, according to the method described above determined, 2.5 percentage points or less, preferably 2 percentage points or less.
- Transparent coatings for paper substrates are state of the art known and are differentiated according to whether the transparent Coating component dispersed or dissolved in a suitable Medium (aqueous or solvent) is available for application.
- suitable Medium aqueous or solvent
- examples for transparent coatings or varnishes are comprehensive Nitrocellulose (nitrocellulose varnishes) or acrylates (acrylate varnishes).
- top Coating it is also possible not only before applying the top coating one but the surface of different arranged on the nonwoven fabric Treat layers with laser energy what's on top Coating leads to a marking which, as such, is different Has color density, color location, gloss and / or reflection. However, is preferred treating the surface of a single layer with laser energy.
- the method according to the invention it is possible to transfer digitized image templates to the not yet finally coated, in particular printed, metallized and / or lacquered paper, the image then being visible in the uppermost coating after the final coating step, i.e. printing, painting or metallizing becomes.
- the method according to the invention therefore makes it possible to make the marking visible only in the uppermost coating, whereas conventional “watermark” methods aim to make the marking visible in the paper substrate itself.
- conventional watermarking methods cannot readily be used in the case of nonwoven substrates of higher mass per unit area, such as, for example, in cartons with at least 150 g / m 2 .
- the markings produced by the method according to the invention are especially on metallized paper in reflected light visible or perceptible.
- the invention further relates to a marking in the uppermost coating paper products, such as papers and boxes, which are produced by the the methods described above are available.
- These marked papers and cartons made of a substrate as described above, which is based on the surface of which has been treated with laser energy and one on top arranged top, opaque coating, on the surface of which Marking on the underlying paper substrate by laser was generated, easily by changing the color density, the Color location, the gloss and / or the reflection is perceptible.
- the one on the top opaque laser-coated layer of substrate Coating consists of at least one print and / or at least one metallization and / or at least one painting or a combination of these individual coatings in different Order may be appropriate.
- the laser treated substrate of the paper product i.e. the paper and Cardboard substrate is selected from the group of non-woven fabrics on which Prepared non-woven fabrics, coated non-woven fabrics, which optionally prepared and / or metallized below the coating can be metallized nonwovens, which may be below the metallization can be prepared and / or coated.
- the influence of various top coatings on the increase in opacity of paper substrates was determined.
- the opacity of the paper substrate without a coating was subtracted from the opacity of the paper substrate having the top coating, in order to obtain information about the opacity or opacity of the coating itself.
- the difference gave a percentage value, which corresponds to the absolute increase in opacity caused by the coating in percentage points.
- the opacity of the paper before and after coating was determined in accordance with DIN 53146.
- a continuous carbon dioxide laser with 30 watts of power was used to, using a stretching energy (laser power / laser scanning speed) of 120 J / m, a nonwoven fabric on a paper machine screen with a water content of 88% by weight with 6 x 35 mm markings.
- the nonwoven fabric was dried to a moisture content of 6-7% by weight and had a mass per unit area of 85 g / m 2 .
- the paper was printed using offset and inkjet printing processes. In both printing processes, the laser markings are visible in the reflecting light and are of good quality.
- a 100 Hz (nominal) pulsed carbon dioxide laser system with a pulse energy of 3.27 J to 5.27 J was used to produce a nonwoven fabric on a paper machine screen with a water content of 88% by weight by means of a shadow projection of 0.64 cm 2 large markings.
- the nonwoven fabric was dried to a moisture content of 6-7% by weight and had a mass per unit area of 85 g / m 2 . After drying, the paper was printed using offset and inkjet printing processes. It was found that an energy density of 8 8.0 J / cm 2 represents a minimum threshold for visible marking formation in both printing processes.
- a continuous carbon dioxide laser with an output power of 30 watts was used to produce white and colored "natural papers" with a moisture content of approx. 6-7 wt.
- 80 g / m 2 heavy provided with an unpigmented starch solution .-%, using a line energy of 6 J / m, with 13 x 70 mm markings.
- the surfaces provided with a mark were printed using offset and inkjet printing processes. In both printing processes, the laser markings are visible in the reflecting light and are of good quality.
- 200 g / m was coated 2 heavy base paper with an aqueous pigmented coating color formulation, and by means of cast-coating method on one side with dry coating weights of approximately 20 g / m 2, and finished by means of high-gloss dry conditioning.
- a continuous carbon dioxide laser with an output power of 30 watts was then used with a test device in order to produce, with an operating power of 3 watts and a line power of 6 J / m, 13 ⁇ 70 mm markings in the coating of the paper thus finished. After the markings had been applied, the surface provided with a mark was printed using an offset printing process.
- the markings were in the reflecting light visible and of good quality.
- a 30 watt output continuous carbon dioxide laser was used to create 13 x 70 mm markings on various white, uncoated and coated papers using 6 J / m stretch energy, after which the papers were marked on them by laser radiation
- Surfaces were metallized using metal vapor deposition.
- the mass per unit area of the papers used were 55, 80 and 220 g / m 2 for the uncoated papers, 70 and 250 g / m 2 for the one-sided coated, 90 and 200 g / m 2 for the two-sided coated papers and the range of the moisture content was from 6 to 8% by weight.
- the metallized paper was tested for its functional usability using the paper as printing material and the usability turned out to be satisfactory.
- This example shows how the markings formed by laser radiation vary at different energy levels.
- the papers used correspond to those in Example 5, the line energy of the laser radiation being varied from 3 to 12 J / m. It was shown that a path energy of less than 5 J / m represents an approximate minimum threshold value for uncoated and 4 J / m for coated papers for a visible marking after the metallization. Visible markings are always obtained at line energies of 5.5 to 8 J / m. Line energies of> 8 J / m gave markings with good visibility after the metallization, but the papers already showed relatively strong carbonization phenomena in the area of the markings before the metallization.
- a continuous carbon dioxide 1 kW laser was used by means of shadow projection over a mask in order to produce markings on different papers (uncoated / coated; white / colored) at different web speeds and on a test device, as indicated in Table 2 below: paper type Mass per unit area (g / m 2 ) paper Color Web speed (m / min) 55 uncoated White 175 80 uncoated White 175 80 uncoated Light Blue 200 220 uncoated White 200 70 coated on one side White 200 250 coated on one side White 200 250 coated on one side blue 200 90 coated on both sides White 200 200 coated on both sides White 200
- the marking size was 11 x 12 mm in each case. After applying the Markings were made using the surfaces provided with a marking Metal vaporization metallized. The ones obtained after metallization Markings were clearly visible in the reflecting light and were more acceptable Quality. The metallized papers were tested according to example 5 and turned out to be satisfactory.
- a 100 Hz (nominal) pulsed carbon dioxide laser system with a pulse energy of 2.0 joules was used to produce a white, uncoated 55 g / m 2 paper and a white, one-sided coated 70 g / m 2 paper at web speeds of 50 to 350 m / min to be marked with shadows.
- a continuous carbon dioxide laser with a 30 watt output line was used to produce 55 g / m 2 base papers with a moisture content of 6-7% by weight, using an operating power of 3 watts, using a line energy of 6 J / m, with 13 x 70 mm markings, according to which the base papers are coated on one side both on the marked and on the unmarked surfaces with an aqueous, microcapsule-free, pigmented coating color formulation, such as is used for cast-coated papers, with dry coating weights of approximately 20 g / m 2 were coated.
- the papers finished by means of the high-gloss drying system showed markings with acceptable visibility in any case; they were tested for their functional usability and the usability proved to be satisfactory.
- This example shows how the markings formed by laser radiation vary at different energy levels.
- the base paper and the laser were as described in Example 9, the path energy of the laser radiation being varied from 5 to 12 J / m. It was shown that a path energy of less than 5 J / m represents a minimum threshold for visible marking formation. Visible markings were always obtained at line energies of 5.5 to 9 J / m. Line energies of> 9 J / m gave markings with good visibility, but the base papers already showed relatively strong signs of carbonization in the area of the markings.
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- Laser Beam Processing (AREA)
Description
- Papiersubstrat - flächenbezogene Masse | oberste Beschichtung | Zunahme der Opazität in Prozentpunkten gegenüber unbeschichtetem Papiersubstrat | Bemerkung |
- Selbstdurchschreibe-Rohpapier | - Mikrokapselbeschichtung | 1,3 - 2,5 | 1 |
- 55 g/m2 | - 5 g/m2 Trockenbeschichtungsgewicht | ||
- ZETA®-Büropapier | - Mikrokapselbeschichtung | 0,8 - 2,0 | 2 |
- 80 g/m2 | - 5 g/m2 Trockenbeschichtungsgewicht | ||
- ZETA®-Büropapier | - Inkjet-Bedruckung | 9,0 - 12,4 | 3 |
- 80 g/m2 | |||
- ZETA®-Büropapier | - Offset-Bedruckung | 8,0 - 12,3 | 4 |
- 80 g/m2 | |||
- ZETA®-Büropapier | - Aluminium-Metallisierung | ≥ 8,5 | 5 |
- 80 g/m2 | - Schichtdicke etwa 10 nm |
Nach der Papiertrocknung wurde das Papier mittels Offset- und Inkjet-Druckverfahren bedruckt.
Bei beiden Druckverfahren sind die Lasermarkierungen im reflektierenden Licht sichtbar und von guter Qualität.
Nach der Trocknung wurde das Papier mittels Offset- und Inkjet-Druckverfahren bedruckt.
Es zeigte sich, daß für eine sichtbare Markierungsbildung bei beiden Druckverfahren, eine Energiedichte von ≥ 8,0 J/cm2 einen Minimumschwellenwert darstellt.
Nach Aufbringung der Markierungen wurden die mit einer Markierung versehenen Oberflächen mittels Offset- und Inkjet-Druckverfahren bedruckt.
Bei beiden Druckverfahren sind die Lasermarkierungen im reflektierenden Licht sichtbar und von guter Qualität.
Anschließend wurde mit einem Testgerät ein kontinuierlicher Kohlendioxid-laser mit 30 Watt Ausgangsleistung verwendet, um mit einer Betriebsleistung von 3 Watt und einer Streckenleistung von 6 J/m, 13 x 70 mm große Markierungen in der Beschichtung des so fertiggestellten Papieres zu erzeugen.
Nach Aufbringung der Markierungen wurde die mit einer Markierung versehene Oberfläche mittels Offset-Druckverfahren bedruckt.
Die flächenbezogenen Massen der verwendeten Papiere waren 55, 80 und 220 g/m2 bei den unbeschichteten Papieren, 70 und 250 g/m2 bei den einseitig beschichteten, 90 und 200 g/m2 bei den zweiseitig beschichteten Papieren und der Bereich des Feuchtigkeitsgehaltes war von 6 bis 8 Gew.-%.
Es zeigte sich, daß unabhängig vom Papiertyp (unbeschichtet/beschichtet) sowie der flächenbezogenen Masse, die nach der Metallisierung erhaltenen Markierungen, je nach Art der Beleuchtung, in reflektierendem Licht heller/dunkler waren und lieferten daher einen Kontrast mit der Fläche des Papiers, die keine Markierung trug.
Es zeigte sich, daß eine Streckenenergie von unter 5 J/m einen angenäherten Minimumschwellenwert bei unbeschichteten, und 4 J/m bei beschichteten Papieren für eine sichtbare Markierung nach der Metallisierung darstellt.
Sichtbare Markierungen werden immer erhalten bei Streckenenergien von 5,5 bis 8 J/m. Streckenenergien von > 8 J/m ergaben nach der Metallisierung Markierungen mit guter Sichtbarkeit, aber die Papiere zeigten vor der Metallisierung schon relativ starke Carbonisierungserscheinungen im Bereich der Markierungen.
Papiertyp Flächenmasse (g/m2) | Papierfarbe | Bahngeschwindigkeit (m/min) |
55 unbeschichtet | weiß | 175 |
80 unbeschichtet | weiß | 175 |
80 unbeschichtet | hellblau | 200 |
220 unbeschichtet | weiß | 200 |
70 einseitig beschichtet | weiß | 200 |
250 einseitig beschichtet | weiß | 200 |
250 einseitig beschichtet | blau | 200 |
90 zweiseitig beschichtet | weiß | 200 |
200 zweiseitig beschichtet | weiß | 200 |
Bei einer Abbildungsgröße von 10 x 8 mm, entsprechend einer Energiedichte von 2,5 Joule/cm2, und unterschiedlichen Repetitionsraten, zeigten die Markierungen eine gute Sichtbarkeit in reflektiertem Licht.
Die mittels Hochglanztrockenanlage fertiggestellten Papiere zeigten in jedem Fall Markierungen mit akzeptabler Sichtbarkeit; sie wurden auf ihre funktionelle Brauchbarkeit getestet und die Brauchbarkeit erwies sich als zufriedenstellend.
Das Basispapier und der Laser waren wie im Beispiel 9 beschrieben, wobei die Streckenenergie der Laserstrahlung von 5 bis 12 J/m variiert wurde.
Es zeigte sich, daß eine Streckenenergie von unter 5 J/m einen Minimumschwellenwert für eine sichtbare Markierungsbildung darstellt. Sichtbare Markierungen wurden immer erhalten bei Streckenenergien von 5,5 bis 9 J/m. Streckenenergien von > 9 J/m ergaben Markierungen mit guter Sichtbarkeit, aber die Basispapiere zeigten schon relativ starke Carbonisierungserscheinungen im Bereich der Markierungen.
Claims (18)
- Verfahren zur Erzeugung einer Markierung in der obersten Beschichtung von Papiersubstraten dadurch, daß man vor der Aufbringung der obersten Beschichtung die Oberfläche wenigstens einer der unterhalb der obersten Beschichtung angeordneten Schichten mit Laserenergie einer Energiedichte zwischen 0,1 und weniger als 1,7 Joules • cm-2 behandelt, wobei die oberste Beschichtung des Papiersubstrats opak ist und ausgewählt ist aus wenigstens einer Bedruckung und/oder wenigstens einer Lackierung und/oder wenigstens einer Metallisierung oder Kombinationen davon.
- Verfahren zur Erzeugung einer Markierung in der obersten Beschichtung von Papiersubstraten dadurch, daß man vor der Aufbringung der obersten Beschichtung die Oberfläche wenigstens einer der unterhalb der obersten Beschichtung angeordneten Schichten mit Laserenergie einer Energiedichte von 1,7 bis 5,0 Joules • cm-2 behandelt, wobei die oberste Beschichtung des Papiersubstrats opak ist und ausgewählt ist aus wenigstens einer Metallisierung und wenigstens einer Metallisierung in Kombination mit wenigstens einer Bedruckung und/oder wenigstens einer Lackierung.
- Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß unmittelbar unterhalb der obersten Beschichtung ein unpigmentierter, weiß- oder farbig-pigmentierter Strich angeordnet ist, welcher zusätzlich verdichtet (satiniert) und gegebenenfalls mit einer Lackierung versehen sein kann.
- Verfahren nach einem oder mehreren der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß man ein Faservlies, ein an der Oberfläche präpariertes Faservlies, ein beschichtetes Faservlies, welches gegebenenfalls unterhalb der Beschichtung präpariert und/oder metallisiert sein kann, ein metallisiertes Faservlies, welches gegebenenfalls unterhalb der Metallisierung präpariert und/oder beschichtet sein kann an der Oberfläche mit Laserenergie behandelt.
- Verfahren nach Anspruch 4, dadurch gekennzeichnet, daß das gegebenenfalls an der Oberfläche präparierte Faservlies beschichtet ist mit einem unpigmentierten, weiß- oder farbig-pigmentierten Strich, welcher zusätzlich verdichtet (satiniert) und gegebenenfalls mit einer Lackierung versehen sein kann.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß man die Oberfläche eines Faservlieses mit Laserenergie behandelt und auf die mit Laserenergie behandelte Oberfläche wenigstens eine weitere Beschichtung aufträgt, die ausgewählt ist aus einer Bedruckung, Lackierung oder Metallisierung.
- Verfahren nach einem oder mehreren der vorangehenden Ansprüche, dadurch gekennzeichnet, daß man die Oberfläche des Faservlieses mit Laserenergie behandelt, die mit Laserenergie behandelte Oberfläche metallisiert und anschließend auf die metallisierte Oberfläche eine Bedruckung und/oder eine Lackierung aufträgt.
- Verfahren nach einem oder mehreren der vorangehenden Ansprüche, dadurch gekennzeichnet, daß man die metallisierte Oberfläche eines Faservlieses, gegebenenfalls nach Aufbringung einer Lackierung oder Bedruckung mit Laserenergie behandelt und anschließend auf die mit Laserenergie behandelte Oberfläche eine Bedruckung und/oder eine Lackierung aufträgt.
- Verfahren nach einem oder mehreren der vorangehenden Ansprüche, dadurch gekennzeichnet, daß man die mit einer Beschichtung gemäß Anspruch 5 versehene Oberfläche eines Faservlieses mit Laserenergie behandelt und anschließend auf die mit Laserenergie behandelte Oberfläche eine Bedruckung und/oder eine Lackierung aufträgt.
- Verfahren nach einem oder mehreren der vorangehenden Ansprüche, dadurch gekennzeichnet, daß man die mit einer Beschichtung gemäß Anspruch 5 versehene Oberfläche eines Faservlieses mit Laserenergie behandelt, die mit Laserenergie behandelte Oberfläche metallisiert und anschließend auf die metallisierte Oberfläche eine Bedruckung und/oder eine Lackierung aufträgt.
- Verfahren nach einem oder mehreren der vorangehenden Ansprüche, dadurch gekennzeichnet, daß man die mit einer Beschichtung gemäß Anspruch 5 versehene Oberfläche eines Faservlieses metallisiert, die metallisierte Oberfläche, welche gegebenenfalls mit einer Lackierung oder Bedruckung versehen werden kann, mit Laserenergie behandelt und auf die mit Laserenergie behandelte Oberfläche eine Bedruckung und/oder eine Lackierung aufträgt.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß man die Oberfläche eines Faservlieses mit Laserenergie behandelt, die mit Laserenergie behandelte Oberfläche mit einer Beschichtung gemäß Anspruch 3 versieht und auf diesen anschließend eine Bedruckung und/oder eine Lackierung aufträgt.
- Verfahren nach einem oder mehreren der Ansprüche 6 bis 12, dadurch gekennzeichnet, daß das Faservlies transparent, opak, weiß oder farbig ist und gegebenenfalls eine Oberflächenpräparation aufweist.
- Verfahren nach einem oder mehreren der Ansprüche 3 und 9 bis 12, dadurch gekennzeichnet, daß es sich bei der Beschichtung des Faservlieses um einen unpigmentierten oder weiß- oder farbig-pigmentierten Strich handelt, welcher zusätzlich verdichtet (satiniert) und zusätzlich mit einer Lackierung versehen sein kann.
- Verfahren nach einem oder mehreren der vorangehenden Ansprüche, dadurch gekennzeichnet, daß die Metallisierung aus Kupfer, Aluminium, Gold oder Silber ist.
- Verfahren nach einem oder mehreren der vorangehenden Ansprüche, dadurch gekennzeichnet, daß die Markierung ein Logo, ein Name, ein Markenzeichen, eine Abbildung oder eine Sicherheitsmarkierung ist.
- Verfahren nach einem oder mehreren der vorangehenden Ansprüche, dadurch gekennzeichnet, daß das Papiersubstrat eine flächenbezogene Masse von 40 bis 400 g/m2 aufweist.
- Markiertes Papierprodukt erhältlich durch ein Verfahren gemäß einem oder mehreren der Ansprüche 1 bis 17.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19822605 | 1998-05-20 | ||
DE19822605A DE19822605C2 (de) | 1998-05-20 | 1998-05-20 | Verfahren zur Markierung von Papieren und Kartons und damit erhältliches Papierprodukt |
PCT/EP1999/003286 WO1999060208A2 (de) | 1998-05-20 | 1999-05-12 | Verfahren zur markierung von papieren und kartons |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1089882A2 EP1089882A2 (de) | 2001-04-11 |
EP1089882B1 true EP1089882B1 (de) | 2002-03-13 |
Family
ID=7868389
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99924958A Expired - Lifetime EP1089882B1 (de) | 1998-05-20 | 1999-05-12 | Verfahren zur markierung von papieren und kartons |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1089882B1 (de) |
AU (1) | AU4142899A (de) |
DE (2) | DE19822605C2 (de) |
WO (1) | WO1999060208A2 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2010094838A1 (en) * | 2009-02-20 | 2010-08-26 | Laminating Papers Oy | Method for the production of an impregnate provided with markings, a board coated with the impregnate, and use of the impregnate in a concrete casting mould |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4680594B2 (ja) | 2002-07-18 | 2011-05-11 | ギーゼッケ ウント デフリエント ゲーエムベーハー | 有価証券 |
ES2238895B1 (es) * | 2003-02-11 | 2007-02-16 | Industrias De Hijos De Antonio Fabregas, S.A. | Papel de seguridad. |
FI119391B (fi) * | 2004-01-05 | 2008-10-31 | Stora Enso Oyj | Menetelmä tunnistemerkintöjen tuottamiseksi paperiin tai kartonkiin sekä menetelmällä aikaansaatu merkitty materiaali |
PL1744899T3 (pl) | 2004-05-05 | 2013-06-28 | Giesecke Devrient Currency Tech Gmbh | Dokument wartościowy |
FI20060382A0 (fi) * | 2006-04-21 | 2006-04-21 | Stora Enso Oyj | Menetelmä paperin tai kartongin merkitsemiseksi ja menetelmällä merkitty materiaali |
DE102009037862A1 (de) * | 2009-08-18 | 2011-05-19 | Huhtamaki Ronsberg, Zweigniederlassung Der Huhtamaki Deutschland Gmbh & Co. Kg | Mehrschichtiges Verpackungsmaterial, Einheit eines derartigen Verpackungsmaterials, daraus hergestellte Verpackung und Rollenmateril |
DE102009040359A1 (de) * | 2009-09-07 | 2011-03-10 | Heidelberger Druckmaschinen Ag | Verfahren zum Erzeugen eines drucktechnischen Merkmals auf einem Substrat eines Druckprodukts |
DE102013000445A1 (de) * | 2013-01-11 | 2014-07-17 | Giesecke & Devrient Gmbh | Verfahren zum Herstellen einer endlosen Papierbahn und Vorrichtung zur Durchführung desselben |
CA2997558C (en) * | 2015-09-23 | 2023-04-18 | Stora Enso Oyj | Printing paper without ink |
CN109195739A (zh) | 2016-06-03 | 2019-01-11 | 多佛欧洲有限公司 | 用于在金属化基材上产生激光标记的系统和方法 |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3425086C2 (de) * | 1984-07-07 | 1986-12-11 | Heidelberger Druckmaschinen Ag, 6900 Heidelberg | Verfahren und Vorrichtung zum Erstellen von einzigen Ausfertigungen eines Druckes |
DE3431577A1 (de) * | 1984-08-28 | 1986-03-13 | Heinr. Aug. Schoeller Söhne GmbH & Co KG, 5160 Düren | Verfahren zur herstellung echter wasserzeichen in papier |
AT386159B (de) * | 1985-10-11 | 1988-07-11 | Oesterr Nationalbank | Verfahren und vorrichtung zur herstellung von echtheits-(codierungs)-merkmalen auf wertpapieren |
GB8607689D0 (en) * | 1986-03-27 | 1986-04-30 | Wiggins Teape Group Ltd | Imaged microcapsule-coated paper |
SE505397C2 (sv) * | 1995-11-09 | 1997-08-18 | Mo Och Domsjoe Ab | Ytbehandlat säkerhethetspapper och förfarande samt anordning för framställning av ytbehandlat säkerhetspapper |
-
1998
- 1998-05-20 DE DE19822605A patent/DE19822605C2/de not_active Expired - Fee Related
-
1999
- 1999-05-12 WO PCT/EP1999/003286 patent/WO1999060208A2/de active IP Right Grant
- 1999-05-12 DE DE59900991T patent/DE59900991D1/de not_active Expired - Lifetime
- 1999-05-12 AU AU41428/99A patent/AU4142899A/en not_active Abandoned
- 1999-05-12 EP EP99924958A patent/EP1089882B1/de not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2010094838A1 (en) * | 2009-02-20 | 2010-08-26 | Laminating Papers Oy | Method for the production of an impregnate provided with markings, a board coated with the impregnate, and use of the impregnate in a concrete casting mould |
Also Published As
Publication number | Publication date |
---|---|
EP1089882A2 (de) | 2001-04-11 |
WO1999060208A3 (de) | 1999-12-29 |
DE59900991D1 (de) | 2002-04-18 |
WO1999060208A2 (de) | 1999-11-25 |
DE19822605C2 (de) | 2003-04-17 |
DE19822605A1 (de) | 1999-11-25 |
AU4142899A (en) | 1999-12-06 |
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