EP1567363A1 - Laserbeschriftbare folie - Google Patents
Laserbeschriftbare folieInfo
- Publication number
- EP1567363A1 EP1567363A1 EP03796055A EP03796055A EP1567363A1 EP 1567363 A1 EP1567363 A1 EP 1567363A1 EP 03796055 A EP03796055 A EP 03796055A EP 03796055 A EP03796055 A EP 03796055A EP 1567363 A1 EP1567363 A1 EP 1567363A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- laser beam
- film
- medium
- layer
- changed
- 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.)
- Granted
Links
Classifications
-
- 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
- B41M5/267—Marking of plastic artifacts, e.g. with laser
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M3/00—Printing processes to produce particular kinds of printed work, e.g. patterns
- B41M3/14—Security printing
Definitions
- the present invention relates to laser-inscribable films, in particular a film which can be inscribed with a laser beam and which has at least one single-layer or multilayer upper film which is permeable to the laser beam, below which a medium which can be changed by the laser beam is arranged at least in part.
- the present invention relates to a method for producing a film that can be labeled with a laser beam, in which a top or bottom layer that is transparent to the laser beam is provided on its underside with a medium that can be changed by a laser beam, and a film labeling method in which a film , which has a medium that can be changed by a laser beam, is labeled by locally irradiating the medium that can be changed by a laser beam with a laser beam.
- a film of the type described at the outset is known, inter alia, from DE 196 42 040 Cl.
- the film disclosed therein has a plastic protective film which is permeable to a laser beam and on the underside of which a continuous, thin, metallic layer is evaporated, below which there is a contrast-forming layer.
- the metallic layer is locally ablated by the action of the laser beam, ie it disappears at the points at which the laser beam acts on it.
- the viewer can see clearly defined contours with sharp contours, as the view of the contrast-forming layer is released at the ablated areas, whereas the opaque metallic layer continues to determine the visual impression at the non-ablated areas.
- Multicolored laser-inscribable films are known from DE 100 50 553 AI.
- the multi-color is achieved by a complex multi-layer structure, which has different contrast-forming layers, as well as at least two layers of evaporated metallizations of different ablation resistance, the latter of which can be selectively ablated.
- the object of the present invention is to provide a laser-inscribable film, which also with less effort can be produced at short notice and in small series. It should be possible to achieve typefaces of a similar high quality while maintaining relatively simple lettering technology compared to the prior art. Furthermore, a high degree of flexibility should be made possible with regard to the color design and appearance of the film. Furthermore, as with conventional laser foils, no health-endangering and environmentally harmful emissions are to be caused. The good inherent protection of the typeface against mechanical and chemical stresses, which conventional laser foils offer, should also be guaranteed.
- this object is achieved by a film which can be inscribed with a laser beam and which has at least one single-layer or multilayer upper film which is permeable to the laser beam, below which is arranged at least partially a medium which can be changed by the laser beam and which contains microscopic metallic particles having.
- Microscopic is to be understood in particular to mean particles whose diameter does not significantly exceed 100 ⁇ m in the direction of their greatest extent.
- the median value of the mass-related particle size distribution of the metallic particles is preferably less than 20 ⁇ m if the diameter in the direction of the greatest particle expansion is used as the equivalent diameter of the particle size distribution.
- the metallic particles impart opacity to the medium that can be changed by the laser beam, but can be destroyed locally by the action of the laser. Destroying is to be understood here as any change in the particles that locally creates transparency. Any residues in the form of nanoscale particles made of metal or metal compounds, which subsequently precipitate within the medium containing the particles, do not disturb the visual impression. The presence of the top film prevents emissions from being emitted to the environment during the labeling process. The local destruction of the metallic particles and the accompanying local changeover from opaque to transparent results in a sharply contoured lettering, the visibility and aesthetic design of which can advantageously be improved by a contrast layer which is arranged below the medium that can be changed by the laser beam.
- This can be a layer of printing ink or lacquer as well as a film that is contrast-colored, preferably colored, with respect to the laser-changeable medium. Under certain circumstances, further film layers can be arranged under the contrast layer.
- a colored adhesive layer can also act as a contrast layer.
- the top film is usually transparent or partially transparent in order to reveal the laser marking; In principle, however, top films are also conceivable which, although permeable to the laser beam, are opaque to the viewer without aids. This can be made possible, for example, by using a laser at the edge or beyond the visible light wavelength range. In the case of an opaque top film, the medium that can be changed by the laser beam is of course only visible with suitable measures. Different solutions are possible depending on the intended application. For example, the top film can be multi-layered with one or more opaque, but transparent to the laser beam layer (s), and the viewer must remove the opaque layer (s) in order to mark the result of the remaining transparent or partially transparent layers of the Recognize the top film. The use of radiographic readers, which may work outside the wavelength range of visible light, is also conceivable.
- the medium that can be changed by the laser beam can be applied to the underside of the upper film by printing technology.
- Printing a dispersion containing the metallic particles has a number of advantages over vapor deposition or sputtering of a continuous metal layer. On the one hand, printing can be carried out with considerably less expenditure on equipment than metal vapor deposition or sputtering, as a result of which the production costs for the inscribable film can be kept low. Even small-area foils and Small quantities up to small series of laser-inscribable film labels can be produced economically. On the other hand, printing offers a much greater scope for design.
- areas can be realized which are printed with conventional printing ink.
- a multicolored printed image can be produced which contains laser-inscribable areas.
- an organic dye or pigment can be incorporated into the matrix material in order to produce a certain desired color impression.
- the metal particles preferably consist predominantly of aluminum, as a result of which the laser-changeable medium is given a silvery-white appearance as long as the color is not changed by the pigments or dyes mentioned above. Furthermore, the color appearance can be changed by the design of the top film.
- Advantageous solutions are, for example, a single-layer, translucent-colored top film made of plastic or a multilayer top film with a transparent protective film and a translucent printing varnish in the desired color. If, for example, the top film is colored yellow, the impression of a gold color is obtained with the underlying silver-white laser-changeable medium.
- Black particles in particular can be advantageous.
- black offers an excellent color contrast to bright colors in negative lettering
- black particles absorb a high proportion of the laser light radiated during the marking process, so that low laser powers and irradiation times are necessary.
- the metallic particles are flake-like or flake-shaped.
- the diameter of a particle in the direction of its greatest expansion is at least three times as large, but ideally by at least a power of ten larger than the diameter in the direction of the smallest particle expansion.
- the leaflet or flake shape is already statistical at random particle alignment, the ratio between the projection area and particle mass is very large, which has the following advantages: on the one hand, the "target area" for the labeling laser beam is large in relation to the particle volume, so that only low laser powers and irradiation times are required for labeling. On the other hand, the non-laser-irradiated areas get a high degree of brilliance for the viewer.
- Particles of this type can be produced, inter alia, by providing a process foil with a thin metallization, detaching and comminuting the metal layer.
- the underside of the film is preferably coated in a self-adhesive manner in order to enable it to be easily attached to a wide variety of documents.
- the pressure-sensitive adhesive coating is advantageously covered with a siliconized or otherwise self-adhesive coated release material in order to improve storage stability and handling properties.
- the film is designed as a so-called void film in order to irreversibly indicate attempts to detach the film from its location.
- means are attached to the underside of the upper film, which locally reduce the adhesion between the upper film and the medium that can be changed by the laser beam.
- the transparent or partially transparent top film peels off at the points of reduced adhesion, which are thus visible through reflection and refraction effects. If the means to reduce liability are attached in the form of a warning lettering, a clearly visible warning is created, such as "Void".
- the film has security punchings, which form predetermined tear points, and thus irreversibly indicate attempts to detach the film from its location.
- a method for producing a film that can be labeled with a laser beam in which a single or multilayer upper film that is permeable to the laser beam also has on its underside a medium that can be changed by a laser beam is provided, the medium that can be changed by the laser beam being applied in the form of a dispersion containing metallic particles, preferably by printing technology. It is also fundamentally conceivable to apply a coating containing metallic particles by rolling, coating, brushing, spraying or dipping.
- a film labeling method in which a film which has a medium that can be changed by a laser beam is labeled by locally irradiating the medium that can be changed by a laser beam with a laser beam, the medium that can be changed by the laser beam being microscopic has metallic particles.
- the medium which can be changed by the laser beam is preferably located below a layer of the film which is permeable to the laser beam during the labeling process.
- the medium that can be changed by the laser beam is located above all further film layers during the labeling process.
- foils which are of a particularly simple structure and can be produced can be laser-inscribed.
- simple self-adhesive plastic films can be used for laser inscription, which have an inscription field made of printing ink containing metallic particles on their surface. This labeling field can also completely cover the film.
- FIG. 1 shows an embodiment in which the medium that can be changed by the laser beam is applied to a transparent top film in partial areas, and areas of different colors are arranged next to it.
- FIG. 2 shows a laser-inscribable film in which the medium that can be changed by the laser beam is colored.
- FIG. 3 shows an embodiment with a translucent printing lacquer layer to achieve a color effect.
- FIG. 4 shows a laser-inscribable film designed as a void film.
- Fig. 5 shows an embodiment for black and white lettering.
- the opaque labeling layer 2 is applied to the underside of the transparent top film 1, which consists of thin, platelet-shaped metal particles 3, which are embedded in a binder matrix 4.
- Aluminum flakes are particularly suitable as metal particles 3, which are commercially available in particle sizes of around 15 ⁇ m with submicron thicknesses.
- the inscription layer appears in silver white with high brilliance.
- the labeling layer 2 can also extend over the entire surface of the film.
- the labeling layer 2 and the areas 5a, 5b are printed on the underside of the top film 1.
- a plastic film 6 is laminated underneath, which, however, can also be omitted under certain circumstances.
- the entire film structure can be glued to a base via the pressure-sensitive adhesive layer 7.
- the labeling layer 2 represents a medium that can be changed locally by irradiation with a laser beam. At the location of the laser radiation, the particle structure is permanently destroyed, so that the labeling layer 2 becomes locally transparent. If the laser beam is moved over the labeling layer 2 in a path corresponding to the desired labeling, it leaves this labeling as a transparent track.
- labeling is primarily understood to mean the provision of alphanumeric characters, but also the generation of graphic symbols, logos and the like.
- the contrast between the lettering and the surrounding undamaged lettering layer 2 can be increased in various ways.
- the plastic film 6 can be colored in a contrasting color. If the plastic film 6 and the pressure-sensitive adhesive layer 7 are transparent, the contrast is generated by the color of the base (not shown) to which the film is glued.
- the top film 1 which can be pretreated, for example, by means of a primer, is printed on the underside with the labeling layer 2 and the differently colored areas 5a, 5b, a printing image according to customer requirements being readily possible using conventional printing machines.
- the plastic film 6 is then laminated onto the inscription layer 2 together with the adjoining regions 5a, 5b. Finally, the underside of the film is coated with pressure-sensitive adhesive 7.
- the film shown in FIG. 2 also has a transparent top film 11, an inscription layer 12 containing platelet-shaped metal particles 13, a plastic film 16 and a self-adhesive coating 17 on the underside.
- the matrix 14 of the labeling layer 12 contains an additional dye, which together with the silvery white metal particles 13 results in a bright metallic color.
- the plastic film 16 is printed with black printing ink 18 to increase the contrast. The labeling is done as described above. This creates the impression of black writing on a metallic, colorful background.
- the lower layer of the two-day upper film 21 consists of translucent, colored printing lacquer 29.
- the structure underneath consisting of labeling layer 22, plastic film 26, contrast layer 28 and pressure-sensitive adhesive layer 27 again largely corresponds to the structure of the exemplary embodiment shown in FIG. 2, but the matrix of labeling layer 22 does not contain any additional dye.
- silver-white Metal particles 23 and colorless matrix 24 give the viewer the impression of a gold-colored foil.
- the labeling is again as described above.
- the film structure shown in FIG. 4 initially largely resembles the structure shown in FIG. 3 with the omission of the printing lacquer layer 29.
- the underside of the upper film 31 there are so-called void particles 30, which are applied in the form of a lettering and locally the adhesion between the upper film 31 and significantly reduce labeling layer 32.
- the top film 31 partially detaches from the lettering layer 32 due to the partially reduced adhesion, and the lettering corresponding to the attachment of the void particles 30 becomes visible .
- the so-called void effect described can also be achieved by using an upper film 31 made of a material on which the binder matrix 34 of the inscription layer 32 generally adheres poorly, but the underside of which is pretreated on some of the surface before printing with the inscription layer 32 that locally there is increased adhesion between the inscription layer 32 and the top film 31.
- the laser inscription is carried out by local destruction of the metal particles 33.
- the plastic film 36 serves to stabilize the film structure in order to enable better handling.
- FIG. 5 shows a film which can be provided with a black and white typeface by laser inscription.
- the inscription layer 42 printed on the underside of the top film 41 contains black flaky metal particles 43 embedded in a binder matrix 44. These can be produced, for example, by providing a process film with a thin, continuous black metallization and then detaching and crushing it becomes.
- a white-colored plastic film 46 is arranged under the labeling layer 42 and is coated on its underside with pressure-sensitive adhesive 47.
- the laser marking can be carried out in the manner described above, with only small laser powers and irradiation times being required for the local destruction of the black particles 43, since black particles light in the visible Absorb the wavelength range practically completely, so that the energy input is used almost completely.
- the inscription layer 42 can be applied over the surface in terms of printing technology and therefore also with high accuracy, areas with black metal particles 43 and silver-white metal particles can easily be arranged next to one another, which opens up additional scope for the color design.
- all of the measures described in the above exemplary embodiments can be combined with one another in a largely arbitrary combination in order to achieve a specific color impression.
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Thermal Transfer Or Thermal Recording In General (AREA)
- Laminated Bodies (AREA)
- Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)
- Silver Salt Photography Or Processing Solution Therefor (AREA)
- Laser Surgery Devices (AREA)
- Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10256470A DE10256470A1 (de) | 2002-12-03 | 2002-12-03 | Laserbeschriftbare Folie |
DE10256470 | 2002-12-03 | ||
PCT/EP2003/050894 WO2004050380A1 (de) | 2002-12-03 | 2003-11-25 | Laserbeschriftbare folie |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1567363A1 true EP1567363A1 (de) | 2005-08-31 |
EP1567363B1 EP1567363B1 (de) | 2007-03-28 |
Family
ID=32335925
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03796055A Expired - Lifetime EP1567363B1 (de) | 2002-12-03 | 2003-11-25 | Laserbeschriftbare folie |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP1567363B1 (de) |
AT (1) | ATE358026T1 (de) |
AU (1) | AU2003298321A1 (de) |
DE (2) | DE10256470A1 (de) |
ES (1) | ES2285247T3 (de) |
WO (1) | WO2004050380A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114390977A (zh) * | 2019-09-10 | 2022-04-22 | 日声股份有限公司 | 激光诱导的转印法 |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102005003958A1 (de) * | 2005-01-27 | 2006-08-03 | Giesecke & Devrient Gmbh | Sicherheitselement und Verfahren zu seiner Herstellung |
DE102006036367A1 (de) * | 2006-08-02 | 2008-02-07 | Funkwerk Enterprise Communications Gmbh | Verfahren zum Beschriften von Gerätegehäusen |
FR2918959B1 (fr) * | 2007-07-19 | 2010-12-10 | Laselec | Procede et dispositif de fabrication d'un manchon autour d'un cable et d'identification d'un cable |
DE102007050363A1 (de) * | 2007-10-15 | 2009-04-16 | Forschungsinstitut für Pigmente und Lacke e.V. | Verfahren zur Lasermarkierung eines Polymermaterials |
JP6093935B2 (ja) * | 2012-12-13 | 2017-03-15 | 容子 中鼻 | 情報書き込みフィルムおよび試料収納体 |
KR101391037B1 (ko) * | 2013-04-29 | 2014-04-30 | 남의조 | 바코드, 문자, 이미지용 라벨 및 바코드, 문자, 이미지 형성방법 |
PL3178660T3 (pl) | 2015-12-07 | 2019-07-31 | Hueck Folien Ges.M.B.H | Personalizowany element zabezpieczający |
DE102020209557B4 (de) | 2019-07-31 | 2022-01-27 | Tesa Se | Lösbares Folienlaminat, Verwendung und Verfahren zum Lösen dauerhafter Verklebungen |
DE102021207161A1 (de) | 2021-07-07 | 2023-01-12 | Tesa Se | Lösbares Folienlaminat und Verfahren zum Lösen dauerhafter Verklebungen |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6154989A (ja) * | 1984-08-28 | 1986-03-19 | Konishiroku Photo Ind Co Ltd | 光学的情報記録媒体 |
DE19509505C1 (de) * | 1995-03-16 | 1996-01-25 | Beiersdorf Ag | Mehrschichtiges Etikett |
JP3766468B2 (ja) * | 1996-04-18 | 2006-04-12 | 麒麟麦酒株式会社 | レーザ印字用媒体 |
DE19746998B4 (de) * | 1997-10-24 | 2008-06-05 | Tesa Ag | Laseretiketten und ihre Verwendung |
US6503316B1 (en) * | 2000-09-22 | 2003-01-07 | Dmc2 Degussa Metals Catalysts Cerdec Ag | Bismuth-containing laser markable compositions and methods of making and using same |
DE10050553A1 (de) | 2000-10-12 | 2002-04-25 | Schreiner Gmbh & Co Kg | Mit einem Laserstrahl beschriftbare Folie |
DE20017501U1 (de) | 2000-10-12 | 2000-12-14 | Schreiner GmbH & Co. KG, 85764 Oberschleißheim | Mit einem Laserstrahl beschriftbare Folie |
JP2002254819A (ja) * | 2001-03-06 | 2002-09-11 | Ricoh Co Ltd | 光情報記録媒体及びその製造方法 |
-
2002
- 2002-12-03 DE DE10256470A patent/DE10256470A1/de not_active Ceased
-
2003
- 2003-11-25 WO PCT/EP2003/050894 patent/WO2004050380A1/de active IP Right Grant
- 2003-11-25 AT AT03796055T patent/ATE358026T1/de not_active IP Right Cessation
- 2003-11-25 ES ES03796055T patent/ES2285247T3/es not_active Expired - Lifetime
- 2003-11-25 AU AU2003298321A patent/AU2003298321A1/en not_active Abandoned
- 2003-11-25 EP EP03796055A patent/EP1567363B1/de not_active Expired - Lifetime
- 2003-11-25 DE DE50306929T patent/DE50306929D1/de not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO2004050380A1 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114390977A (zh) * | 2019-09-10 | 2022-04-22 | 日声股份有限公司 | 激光诱导的转印法 |
CN114390977B (zh) * | 2019-09-10 | 2024-01-02 | 日声股份有限公司 | 激光诱导的转印法 |
Also Published As
Publication number | Publication date |
---|---|
EP1567363B1 (de) | 2007-03-28 |
WO2004050380A1 (de) | 2004-06-17 |
DE10256470A1 (de) | 2004-06-24 |
ES2285247T3 (es) | 2007-11-16 |
AU2003298321A1 (en) | 2004-06-23 |
ATE358026T1 (de) | 2007-04-15 |
DE50306929D1 (de) | 2007-05-10 |
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