WO2009065630A1 - Feuille pouvant être imprimée par laser - Google Patents

Feuille pouvant être imprimée par laser Download PDF

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Publication number
WO2009065630A1
WO2009065630A1 PCT/EP2008/060374 EP2008060374W WO2009065630A1 WO 2009065630 A1 WO2009065630 A1 WO 2009065630A1 EP 2008060374 W EP2008060374 W EP 2008060374W WO 2009065630 A1 WO2009065630 A1 WO 2009065630A1
Authority
WO
WIPO (PCT)
Prior art keywords
functional layer
arrangement
film
laser
layer arrangement
Prior art date
Application number
PCT/EP2008/060374
Other languages
German (de)
English (en)
Inventor
Michael Siebert
Michael Zibull
Original Assignee
Tesa Ag
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Tesa Ag filed Critical Tesa Ag
Publication of WO2009065630A1 publication Critical patent/WO2009065630A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/02—Physical, chemical or physicochemical properties
    • B32B7/023—Optical properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/16—Layered products comprising a layer of synthetic resin specially treated, e.g. irradiated
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
    • B32B27/20—Layered products comprising a layer of synthetic resin characterised by the use of special additives using fillers, pigments, thixotroping agents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/304—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising vinyl halide (co)polymers, e.g. PVC, PVDC, PVF, PVDF
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/308—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising acrylic (co)polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/40—Layered products comprising a layer of synthetic resin comprising polyurethanes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/02—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions
    • B32B3/08—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions characterised by added members at particular parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/06—Interconnection of layers permitting easy separation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
    • B44C1/00—Processes, not specifically provided for elsewhere, for producing decorative surface effects
    • B44C1/22—Removing surface-material, e.g. by engraving, by etching
    • B44C1/228—Removing surface-material, e.g. by engraving, by etching by laser radiation
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F3/00—Labels, tag tickets, or similar identification or indication means; Seals; Postage or like stamps
    • G09F3/02—Forms or constructions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/308—Heat stability
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/40—Properties of the layers or laminate having particular optical properties
    • B32B2307/402—Coloured
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/584—Scratch resistance
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/71—Resistive to light or to UV
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/714—Inert, i.e. inert to chemical degradation, corrosion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/748—Releasability
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/75—Printability
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2519/00—Labels, badges

Definitions

  • the present invention relates to a laser-inscribable film having the features of the preamble of claim 1 and to a method for producing a laser-inscribable film according to the preamble of claim 18.
  • the cover layer consists of a UV-curing printing ink, which is cured before the application of the acrylate lacquer layer and the electron beam treatment.
  • a very thin, highly-anchored printing ink layer can be achieved.
  • a multilayer film in which there are a plurality of layers, which can be ablated by a laser and have different ablation resistance, below a transparent layer.
  • a laser By suitable choice of the laser parameters, different color patterns can be achieved depending on the color of the ablation and contrast layers.
  • the ablation of the respective layer it is vaporized, whereby the vapor in turn attaches to the overlying film, but this remains transparent.
  • a film in the form of a plastic multilayer body is known, which is composed of hot stamping or hot laminate films (WO 02/36356 A1).
  • This plastic multilayer body contains at least one laser-sensitive layer, which is based on a completely different labeling principle.
  • the laser-sensitive layer is not partially removed, as in the case of the abovementioned labels, but the inscription is instead effected by laser-induced bleaching, a laser-induced color change or by laser-induced blackening.
  • a multi-colored marking is possible by a suitable layer structure and pigment choice.
  • the marking can be carried out either before (WO 03/095225 A1) or according to (WO 03/095745 A1) a permanent connection with a substrate, such as paper.
  • the plastic multilayer bodies described here are not optimal in particular with regard to the production and design of a label. Even the production is technically demanding due to the many different pigments to handle.
  • the labeling is time-consuming and costly especially for multi-colored markers, since the labeling must be done in several stages with different lasers.
  • the present invention is based on the problem to provide a laser-writable film, which is optimized in terms of their structure and the labeling options.
  • a sidelined solution provides a method of making a laser writable film according to claim 18.
  • Advantageous embodiments and further developments are the subject of the respective subclaims.
  • a laser-inscribable film according to the invention has, in addition to a substrate arrangement, a functional layer arrangement.
  • the substrate arrangement may have one or more layers, but in particular it has a substrate layer made of plastic.
  • the essential function of the substrate layer arrangement is to provide a support for the functional layer arrangement.
  • the substrate layer arrangement can optionally also provide or contain further functions.
  • the functional layer arrangement is designed as a hot laminate or as a hot stamping layer arrangement and connected to the substrate arrangement by hot lamination or hot stamping, respectively.
  • the functional layer arrangement has a laser-sensitive layer in which a marking by means of laser irradiation is possible.
  • the functional layer arrangement can also have further layers, which can also be labeled by means of laser irradiation, if appropriate also independently of the one laser-sensitive layer.
  • the inscription of the laser-inscribable film is optionally also possible in addition to the functional layer arrangement in the substrate arrangement.
  • the labeling of the functional layer arrangement takes place in that the functional layer arrangement is in any case partially removed by laser irradiation.
  • partial removal means that the functional layer arrangement can be removed pointwise, but also linearly or in sections. Partially, however, also means that the functional layer arrangement does not have to be completely removed, but rather it is sufficient for the removal to extend only to individual layers. Due to the partial removal of the functional layer arrangement or of individual layers of the same, it is formed in the remaining functional layer arrangement the label. The layer of the functional arrangement or of the substrate arrangement remaining under the removed layer or layers forms a contrast to the remaining functional layer arrangement, so that the marking can be recognized.
  • a particular advantage of this type of labeling is also that in the laser-writable film by the label - a part of the functional layer is removed - a relief structure is formed. The marking can therefore already be distinguished from a simple printing due to the relief structure.
  • Hot lamination and hot stamping foils are distinguished by a multilayer structure, the lowest layer consisting of a thermoplastic reactive adhesive known to the skilled person, which is modified depending on the substrate.
  • the reactive adhesive is thus matched to the sub-arrangement.
  • On this layer is preferably one or more decorative layers, each of which may be both local multicolor patterns, as well as full-surface monochrome.
  • a lacquer layer can be applied as a protective layer against chemicals or scratching. This specially structured lacquer layer can also contain decors (single or multi-colored).
  • the layers of the hot laminate or the hot stamping layer arrangement are usually protected by a temporary polyester carrier.
  • This usually has a release layer, which is intended to ensure easy detachment of the carrier from the other layers.
  • the ink When hot lamination (thermal lamination), the ink is transferred to the substrate by means of a hot roller. Due to the full-surface pressure and the set temperature, a full-surface transfer of the color layers is always achieved. These transfer films can be provided both over the entire surface with the ink layers to be transferred (one or more colors) as well as with corresponding decors (likewise one or more colors).
  • hot stamping on the other hand, a transfer of a color layer (usually monochrome) takes place locally, ie as a rule not over the entire surface, by means of a hot stamping die. The temperature of the roller or of the embossing stamp is dependent on the hot stamping foil and the substrate. Hot laminates and hot stamping foils have an internal strength of the different layers to one another, even in the case of multi-layered construction, which prevents non-destructive removal of a single layer. This also makes manipulation of the information content stored in the layers much more difficult.
  • the design of the functional layer arrangement as a hot laminate or as a hot stamping layer arrangement also allows a permanent anchoring of the functional layer arrangement on the substrate arrangement. Such a permanent anchoring is particularly advantageous in terms of increased manipulation resistance of the laser-writable film.
  • the partial removal of the functional layer arrangement by means of only one suitable laser is also possible, even in the case of a multilayer structure of the functional layer arrangement.
  • a suitable laser for this purpose is, for example, an Nd: YAG laser (1064 nm) or a CO2 laser (10.6 ⁇ m). This allows a multi-colored marking using only one laser in a functional layer arrangement with different colored layers.
  • the functional layer arrangement is partially removable by laser-induced engraving and the associated material removal of
  • the engraving and the associated removal of material can be achieved, for example, by burn-off and / or laser-induced ablation.
  • the engraving can be very easy means
  • Laser irradiation can be achieved. It is also advantageous that with appropriate choice of material, different layers of the functional layer arrangement can be removed with the same laser. Concerning. the choice of material is particularly on the
  • a particular possibility for increasing the security against forgery of the laser-writable film is to additionally mark the film independently of the actual laser inscription.
  • Such a mark can, for example, by a series-dependent identification of
  • Warning text or another desired identifier as a series-dependent mark in the functional layer arrangement be introduced.
  • Such a series-dependent marking may for example be provided as a layer in the hot laminate or by a corresponding hot stamping.
  • a series-dependent marking reference is made in particular to the disclosure content of DE 101 42 638 A1.
  • a multi-layered functional layer arrangement with layers of different color allows a multi-colored marking by the respective layers are partially removed, so that the underlying layers are visible with correspondingly different color.
  • the individual layers should be connected to one another in such a way that they can only be separated from one another by destruction, that is to say that the respective layer is not retained as a whole in the splitting.
  • Such a configuration can be achieved in particular by the design of the functional layer arrangement as a hot laminate.
  • the functional layer arrangement contains color pigments which favor or facilitate the removal of the respective layer.
  • the functional layer arrangement contains different color pigments in different layers, so as to enable a multi-colored marking. The color pigments are selected so that they can all be addressed by means of the same laser, thus a wavelength selectivity does not exist.
  • the design of the functional layer arrangement as a hot laminate or Hndgarge Anlagenan angel also offers the ability to form the individual layers of the functional layer arrangement is particularly thin, in particular, a thickness of less than 20 microns is feasible.
  • the thickness of individual layers should be in the range of 1 .mu.m to 10 .mu.m.
  • a small thickness of the individual layers offers, in addition to the low overall thickness of the film, the advantage that the development of dust in laser inscription is reduced, since the material removal is correspondingly lower.
  • the functional layer arrangement has a protective layer, it also being possible for this protective layer to iron color pigments and thus likewise be usable for the inscription.
  • the protective layer can be designed to increase the scratch resistance, temperature resistance, solvent resistance and / or UV resistance. If a label is made in the protective layer itself, it will be removed locally and thus impaired in its function. However, such impairment is locally limited. The majority of the protective layer fulfills its purpose despite labeling.
  • the substrate arrangement has at least one acrylate film, which is preferably made slightly brittle.
  • the acrylate film reference is made in particular to the disclosure of DE 100 48 665 A1.
  • An acrylate film, in particular in combination with a hot laminate as a functional layer arrangement, is therefore particularly well suited for the design of a non-removable security label, since the laser-writable film can not be removed without destruction after being bonded to an adhesive substrate.
  • the substrate arrangement may comprise exclusively or in addition to other layers a substrate film, in particular as a carrier of the entire film structure.
  • the substrate film is made of one of the following materials: polyethylene terephthalate, polyethylene, polyurethane, polyvinyl chloride.
  • the substrate arrangement may be colored to provide, for example, a contrast layer for the functional layer arrangement.
  • the laser-writable film is self-adhesive.
  • it has an adhesive layer, preferably on the
  • the adhesive layer should, as is known to the person skilled in the art, be based on the particular bonding substrate and the requirements associated therewith
  • the adhesive layer has a pressure-sensitive adhesive for this purpose.
  • the adhesive layer is temporarily covered in a preferred embodiment with a release layer.
  • Such separation layers are known to the skilled person in a variety, for example in the form of siliconized films.
  • the temporary cover can, as soon as the film is to be glued to a bonding substrate, easily peeled off and the film glued.
  • the release layer can be an additional film that is released from the laser-writable film and then removed. Depending on the configuration, however, provision may also be made for the laser-inscribable film itself to provide the separating layer.
  • the laser-writable film is rolled up and the upper side of the functional layer arrangement forms the separating layer, ie it is configured so that it can be easily detached from the adhesive layer.
  • a siliconization of the separating layer is provided for this purpose.
  • the laser-writable film according to the invention is particularly suitable for labels for marking objects.
  • the laser-writable film can also be cut by means of laser irradiation, in particular namely with the same laser, with which the inscription takes place.
  • laser irradiation in particular namely with the same laser
  • the particular design can be stored together with the information content of each label for later review.
  • Such a label which is cut out of a laser-inscribable film by means of laser irradiation, has a characteristic structure of the laser-cutting process, especially at its edge. This allows a distinction from a stamped part. Further, such a structure may serve as another feature for verifying the originality of a label.
  • a substrate arrangement on the one hand and a functional layer arrangement as a hot laminate or as a hot-stamping layer arrangement on the other hand are provided.
  • the functional layer arrangement is connected to the substrate arrangement by hot lamination or hot stamping.
  • the functional layer arrangement is partially removed by laser irradiation.
  • the functional layer arrangement optionally forms an inscription in interaction with the substrate arrangement as a contrast layer.
  • Such a label may be any mark, but in particular a marking which is individual for each label, for example an identification number or the like.
  • the laser irradiation for inscribing the functional layer arrangement can take place before, but preferably also after the connection to the substrate arrangement.
  • the substrate arrangement itself is also labeled by laser irradiation.
  • the functional layer arrangement and the substrate arrangement are permanently connected to one another by the hot lamination or hot embossing. A separation is then no longer possible without destroying the respective arrangements.
  • the laser-writable film receives a particular series-dependent marking, regardless of the actual laser marking. Such a series-dependent marking takes place in particular by marking the hot laminate or the hot stamping layer arrangement.
  • the functional layer arrangement is customer-specifically marked, for example by introducing a customer logo into the functional layer arrangement.
  • the labeling of the film takes place in particular by a partial removal of material by engraving the functional layer arrangement.
  • the functional layer arrangement can be removed in only one layer, but in the case of a multilayer structure, individual or several layers can also be removed jointly or in succession.
  • the film is cut into labels by means of laser irradiation.
  • the laser cutting process takes place in particular in a common step with the labeling of the film by the partial removal of the functional layer arrangement.
  • the same laser can be used for the labeling and the cutting process.
  • the laser cutting process also makes it easy to customize the labels with regard to their shape (shape and size).
  • the Information about the inscribed on the label information content and generated external shape are stored together to allow for later identification and control.
  • both content and form can be flexibly changed in a very short time within a production process, or the production process itself can be designed so that labels of different shapes and different contents can be produced in a demand-specific manner.
  • an adhesive layer is applied to the substrate assembly in the manufacturing process.
  • the application of the adhesive layer can basically be done both before and after the laser inscription.
  • the application is carried out before the laser cutting process.
  • the adhesive layer is temporarily covered with a release layer, wherein the release layer can also be provided by the underside of the functional layer arrangement.
  • the film is additionally wound up.
  • FIG. 1 shows a label made of a laser-inscribable film according to the invention according to a first embodiment during a labeling process carried out with the aid of a laser
  • FIG. 3 is a plan view of the labeled label of FIG .. 2
  • the substrate assembly 2 is formed in the embodiment shown here exclusively from a polyethylene film with a thickness of 20 microns.
  • the polyethylene film 2 is monochrome, here white, colored to form a contrast layer to the functional layer arrangement 3.
  • the functional layer arrangement 3 is applied over the entire surface of the substrate arrangement 2 and is formed from a first layer 4, a second layer 5 and a third layer 6.
  • the first layer 4 is a thermoplastic reactive adhesive having a layer thickness of about 2 ⁇ m.
  • the second layer 5 is formed as a pigmented lacquer and has a layer thickness of about 5 microns.
  • the third layer 6 is also formed as a pigmented paint with a layer thickness of about 5 microns.
  • the components of the layers 3-6 are known to the person skilled in the art and commercially available, for example, from the company LEONHARD KURZ Stainless & Co. KG.
  • the second layer 5 is colored red in the present case, the third layer 6 black.
  • Both layers 5, 6 of the functional layer arrangement 3 can be labeled by means of laser irradiation, namely by the fact that each layer 5, 6 can be partially removed by the laser irradiation. The partial removal of the respective layer 5, 6 takes place by local engraving of the respective layer 5, 6.
  • the three layers 4, 5, 6 are formed together as a hot laminate and connected by hot lamination with the substrate assembly 2, here so with the polyethylene film.
  • the hot lamination is carried out in such a way that the functional layer arrangement 3 is permanently anchored to the substrate arrangement 2. This anchoring has the consequence that removal of the functional layer arrangement 3 from the substrate arrangement 2 is possible only with destruction of at least one of the two arrangements, in particular the functional layer arrangement 3.
  • the functional layer arrangement 3 is formed as a hot laminate, the individual layers 5, 6 of the functional layer arrangement 3 are connected to one another such that a splitting of the layers 5, 6 is not possible without destruction.
  • the design of the functional layer arrangement 3 as a hot laminate forms the possibility of forming the individual layers with a small thickness. It has been found, in particular, that thicknesses of the lacquer layers of less than 10 ⁇ m, preferably only a few ⁇ m, are possible.
  • Fig. 1 also shows how the laser marking of the film 1 takes place.
  • the first layer 6, is removed locally.
  • the second layer 5 shines through, forming the inscription.
  • the inscription of the two layers 5, 6 can be carried out with the same laser.
  • an Nd: YAG laser with a power of 30 W is suitable here.
  • Another advantage of laser inscription by removing the functional layer arrangement 3 is that a microstructuring of the surface of the functional layer arrangement 3 is carried out. Due to this microstructuring, this type of laser marking can be easily distinguished from simple printing.
  • the substrate arrangement 2 can also be labeled by means of laser inscription. Preferably, this labeling also takes place by a partial removal of the substrate arrangement 2. A partial removal, however, may impair the substrate arrangement 2 in its supporting function, in particular when the inscription is effected over a large area. Therefore, it can also be provided that the lettering of the substrate assembly 2 is realized by a color change or the like.
  • an adhesive layer 7 is additionally arranged on the side of the substrate arrangement 2 opposite the functional layer arrangement 3.
  • the adhesive layer 7 serves to arrange a label made of the film 1 on any adhesive substrate.
  • the adhesive layer 7 is in particular adapted to the specific application so that it defines the label on the adhesive substrate, in particular ensures adequate long-term stability, has sufficient adhesion, etc.
  • the adhesive layer 7 here and preferably has a pressure-sensitive adhesive, so that the label be self-adhesive can.
  • the separating layer 8 is designed in such a way that it can easily be pulled off from the label before the label is adhesively bonded.
  • FIG. 2 shows an alternative embodiment of a label made of a laser-inscribable film 1.
  • This label 1 in turn has a substrate arrangement 2 as well as a functional layer arrangement 3. Furthermore, an adhesive layer 7 is provided, which is temporarily covered with a release layer 8.
  • the substrate assembly 2 differs from the previous embodiment now in that it consists of an acrylate film. The result of this is that the acrylate film 2 is destroyed in an attempt to separate the substrate arrangement 2 from the functional layer arrangement 3 or in an attempt to remove the film after bonding to a substrate, and thus such a manipulation attempt is displayed.
  • the laser-writable film 1 is thereby not reusable.
  • the functional layer arrangement 3 differs from the previously described embodiment.
  • the functional layer arrangement 3 has a series-dependent marking 9.
  • the production-dependent marking 9 has been introduced during the production of the film 1 between the first layer 4 and the second layer 5 during the layer production in the functional layer arrangement 3, for example by printing or pouring an engraving layer.
  • the series-dependent marking 9 in the present case is the applicant's logo. But it can also be provided any other markings.
  • the laser inscription can also be seen in FIG. In the present case, the word "LASER" has been inscribed in the functional layer arrangement 3.

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  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Optics & Photonics (AREA)
  • Toxicology (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Thermal Transfer Or Thermal Recording In General (AREA)

Abstract

L'invention concerne une feuille pouvant être imprimée par laser, qui comporte un système de substrat et un système de couches fonctionnelles, le système de couches fonctionnelles étant conçu sous la forme d'un stratifié à chaud ou d'un système de couches estampées à chaud et étant relié par stratification à chaud ou estampage à chaud au système de substrat, le système de couches fonctionnelles pouvant être imprimé à l'aide d'un rayonnement laser. Ladite feuille est caractérisée en ce que le système de couches fonctionnelles peut être éliminé tout au moins partiellement par exposition au laser, l'impression étant formée par l'élimination partielle.
PCT/EP2008/060374 2007-11-19 2008-08-07 Feuille pouvant être imprimée par laser WO2009065630A1 (fr)

Applications Claiming Priority (2)

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DE102007055356A DE102007055356A1 (de) 2007-11-19 2007-11-19 Laserbeschriftbare Folie
DE102007055356.2 2007-11-19

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WO2009065630A1 true WO2009065630A1 (fr) 2009-05-28

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Cited By (4)

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ES2391343A1 (es) * 2010-06-04 2012-11-23 Grupo Antolín - Ingeniería, S.A. Procedimiento de montaje en vehículos de piezas interiores marcadas con etiquetas informativas.
EP2574419A1 (fr) 2011-09-29 2013-04-03 Borbet GmbH Roue dotée d'une surface extérieure aux propriétés optiques modifiées ainsi que son procédé de fabrication
WO2019057645A1 (fr) * 2017-09-22 2019-03-28 Tesa Se Feuille marquable au laser
WO2022196397A1 (fr) * 2021-03-17 2022-09-22 東洋紡株式会社 Corps d'affichage stratifié imprimé au laser

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US9824610B2 (en) * 2010-05-11 2017-11-21 GM Global Technology Operations LLC Vehicle identification number (VIN) label
EP2392484A1 (fr) * 2010-06-04 2011-12-07 Grupo Antolin-Ingenieria, S.A. Procédé d'assemblage des éléments intérieurs pourvue d'étiquettes informatives
DE102015011894A1 (de) * 2015-09-11 2017-03-16 Konrad Hornschuch Ag Folie
CN115179619B (zh) * 2021-09-28 2023-06-27 广东硕成科技股份有限公司 一种复合材料压合垫及其标码作业工艺和应用
CN114425920A (zh) * 2022-03-21 2022-05-03 东莞市广正模具塑胶有限公司 一种采用镭雕和烫金技术的壳体表面处理工艺

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EP2574419A1 (fr) 2011-09-29 2013-04-03 Borbet GmbH Roue dotée d'une surface extérieure aux propriétés optiques modifiées ainsi que son procédé de fabrication
WO2019057645A1 (fr) * 2017-09-22 2019-03-28 Tesa Se Feuille marquable au laser
WO2022196397A1 (fr) * 2021-03-17 2022-09-22 東洋紡株式会社 Corps d'affichage stratifié imprimé au laser

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