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
  • B41M5/382—Contact thermal transfer or sublimation processes
  • B41M5/38207—Contact thermal transfer or sublimation processes characterised by aspects not provided for in groups B41M5/385 - B41M5/395
• • 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
  • B41M5/382—Contact thermal transfer or sublimation processes
  • B41M5/38207—Contact thermal transfer or sublimation processes characterised by aspects not provided for in groups B41M5/385 - B41M5/395
  • B41M5/38214—Structural details, e.g. multilayer systems
• • 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
  • B44C1/16—Processes, not specifically provided for elsewhere, for producing decorative surface effects for applying transfer pictures or the like
  • B44C1/165—Processes, not specifically provided for elsewhere, for producing decorative surface effects for applying transfer pictures or the like for decalcomanias; sheet material therefor
  • B44C1/17—Dry transfer
  • B44C1/1712—Decalcomanias applied under heat and pressure, e.g. provided with a heat activable adhesive
  • B44C1/1729—Hot stamping techniques
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10S428/00—Stock material or miscellaneous articles
  • Y10S428/914—Transfer or decalcomania

Definitions

• the invention relates to an embossing film, in particular a hot stamping film, with a decorative layer which is detachably arranged on a carrier film and can be transferred to a substrate by means of heat and / or pressure and adheres to the substrate.
• the invention further relates to a method for producing such an embossing film.
• stamping foils in particular also hot stamping foils, are known which make it possible to decorate the surface of a substrate in a certain way, i.e. attach certain decorative elements on the substrate surface.
• the embossing foils with a continuous, all-over decorative layer there is also the risk that, for example when using a poorly worked or damaged stamp, the embossed image of the decorative layer on the substrate is not clean, be it that the contours are frayed, be it that, for example because of a poor substrate surface, the decorative layer does not adhere to the substrate in some areas.
• the area-wise transfer of patterned areas is particularly problematic
• the invention is therefore based on the object of creating an embossing foil, in particular hot stamping foil, which allows the abovementioned defects to be eliminated in a simple manner, ie in particular a foil which without exact registration of the stamp and decor of the decor layer always leads to a clean decor on the substrate surface, which can still be offered with a relatively finely patterned decor layer and which, if necessary, offers the possibility of changing the respective decor quickly in a simple manner, eg to individually label individual documents.
• an embossing film of the type mentioned at the outset that the decorative layer is only provided in regions in accordance with a desired patterning of the substrate on the carrier film.
• an embossing foil only has a corresponding one in the areas in which the substrate is actually to be provided with a corresponding decoration or pattern
• the stamping foil according to the invention can be designed in various ways.
• the decorative layer preferably comprising a protective lacquer layer, at least one colored lacquer layer and / or metal layer and an adhesive layer, starting from the carrier film.
• the decorative layer of a hot stamping foil according to the invention basically corresponds to the known hot stamping foils, as are explained, for example, in DE 43 13 519 AI.
• a release layer is arranged between the carrier film and the decorative layer and / or if the adhesive layer can be activated by radiation, in particular heat.
• a method for the production of corresponding stamping foils, which is characterized in that in the areas in which no decorative layer is desired on the carrier film, a slave foil with good adhesion to the decorative layer with the large area on the Carrier film existing decorative layer is brought into contact under the action of heat and / or pressure, so that the decorative layer adheres to the slave film in the corresponding areas, and that the slave film is then removed from the carrier film of the embossing film with the decorative layer being carried in regions.
• the slave film in the form of a negative image of the desired decor in the areas in which no decorative layer should be present in the embossing film, pressed against the decorative layer and then by pulling off the slave film, the decorative layer in areas accordingly removed the carrier film of the stamping foil.
• Tools can be used to press the slave foil against the decorative layer of the embossing foil, which can change very quickly Have the pattern of the decorative layer also changed. In any case, it is no longer necessary to produce the comparatively complex stamps.
• the decorative layer can also be provided in a very simple manner with an individual pattern, for example changing from document to document.
• "write" labels such as consecutive numbers, changing one after the other and in accordance with the arrangement on the respective substrate, as a result of which the label is pressed in accordance with these variable labels. If a normal typewriter similar to a typewriter is used for this purpose, however, the embossing foil would be given a corresponding marking in negative writing.
• the decorative layer and, at the same time, its clean detachment from the carrier film is achieved in that the slave foil is brought into contact with the areas of the decorative layer of the stamping foil to be removed under the action of heat and / or pressure, the procedure advantageously being such that the slave foil is used by means of a thermal transfer print head is brought into contact with the areas of the decorative layer of the embossing foil to be removed.
• thermal transfer printheads including the hardware and software required to control them, are known elements. These can easily be stamped into - also known per se -
• FIG. 2 shows schematically the pressing of the slave foil against the decorative layer of the stamping foil
• FIG. 3 shows an stamping foil according to the invention and the slave foil with the negative areas of the decorative layer removed after carrying out the method according to the invention.
• the embossing film 1 according to FIGS. 1 and 2 is a hot stamping film known per se, such as is basically described for example in DE 43 13 519 AI, although with regard to the special type of production of the decor according to the invention, the at State of the art additional decorative lacquer layer can be omitted. For certain areas of application, however, it would also be conceivable to provide the decorative layer with a special pattern created in a printing process.
• the embossing film 1 according to FIG. 1 consists in a manner known per se of a carrier film 2, for example of PET with a thickness of approximately 19 to 23 ⁇ m.
• another decorative layer could also be present, for example an only colored, but nevertheless transparent lacquer layer, a metal layer or the like. It would also be conceivable to apply the colored lacquer layer 5 by several layers in a manner known per se from hot stamping foils replace, for example to provide a hologram or other diffractive optically effective layer. Basically, no significant restrictions apply to the design of the decorative layer 3. This is a layer which is customary and known per se for hot stamping foils, but can, if necessary, be subdivided into fine screen dots and detached from the carrier film 2 in this form.
• the layer thickness of the lacquer layers 4 and 5 or the adhesive layer is also selected depending on the respective requirements in the range customary for hot stamping foils.
• the thickness of the lacquer layers 4, 5 is normally between 1 and 10 ⁇ m.
• the adhesive layer usually has a thickness of 0.5 to 5 ⁇ m, it even being possible to dispense with a special adhesive layer 6 if the layer 5 has corresponding adhesive properties.
• the take-up film 7 (top in FIG. 1) corresponds in terms of its construction in so far known thermal transfer Foils than is expedient for contacting the decorative layer 3 by means of a thermal transfer printer.
• the slave film 7 comprises only a carrier film 8 and an adhesive layer 9, a special feature being that the adhesive layer 9 adheres very well to the carrier film 8.
• a sliding layer 10 can be provided, which serves to ensure that the receiving film 7 slides smoothly with respect to the print head, for example a thermal transfer print head.
• the slave foil 7 should, especially when it comes to producing a very fine pattern of the decorative layer of the stamping foil 1, be relatively good flexible in order to enable the slave foil 7 to be pressed against the decorative layer 3 of the stamping foil 1 in very small areas.
• the carrier film 8 is normally chosen to be substantially thinner than the carrier film 2 of the embossing film 1.
• the carrier film 8 of the slave film 7 can be a PET film with a thickness of 3.5 to 12.0 ⁇ m.
• the sliding layer has a thickness of 0.1 to 1 ⁇ m.
• the adhesive layer of the slave film 7 is approximately 0.5 to 5 ⁇ m thick.
• composition of the different layers are the following:
• Toluene 30 Polymethyl methacrylate 20 (MW: approx.100,000, density: 1.18 g / ccm)
• UV absorber (benzotriazole derivative, density 1.17 g / ccm) 1.5
• HALS stabilizer tetramethylpiperidine derivative
• Toluene 20 polymethyl acrylate 15.5
• Adhesive layer 6 (the stamping foil) parts
• Linear thermoplastic polyurethane 8 (density: 1.15 g / ccm)
• Adhesive layer 9 (the slave film) parts
• Copolyester resin (softening point: 67 ° C) 7
• FIG. 2 shows how the adhesive layer 9 of the receiver film 7 is pressed against the adhesive layer 6 of the decorative layer 3 of the embossing film 1 by means of a corresponding printing element, for example a heated printing element 11 of a thermal transfer printing head.
• a corresponding printing element for example a heated printing element 11 of a thermal transfer printing head.
• the dashed representations 11 'of the printing element 11 in FIG. 2 are intended to indicate that this pressing process can be repeated in accordance with the desired negative image of the pattern of the decorative layer 3 of the embossing film 1, the possibility being given relative to the size of the printing element 11 to create fine patterns.
• composition of the adhesive layer 9 of the slave film 7 and of the layers 4, 5 and 6 of the decorative layer 3 of the embossing film 1 are chosen such that on the one hand the two adhesive layers 6, 9 adhere very well to one another after being pressed on, possibly under the influence of heat. On the other hand, however, it is also ensured that the layers 4, 5, 6 of the decorative layer 3 adhere to one another so tightly that when the slave film 7 is pulled off reliably in the area in which the two adhesives 6, 9 come into contact came together, the entire decorative layer 3 is removed from the carrier film 2 of the embossing film 1.
• FIG. 3 shows the state after the slave film 7 has been removed from the stamping film 1, FIG. 3, clearly showing at the bottom, that the stamping film 1 'produced using the method according to the invention only has the decorative layer 3 in the areas 12, while in the remaining areas 13 corresponding to the negative representation of the desired decor, the decorative layer 3 of the
• Carrier film 2 of the embossing film 1 is peeled off and adheres via its adhesive layer 6 to the adhesive layer 9 and thus to the carrier film 8 of the slave film 7.
• stamping foils according to the invention can be used for a wide variety of purposes.
• a wide variety of substrates can be decorated, for example plastic surfaces, paper, cardboard boxes, textiles, Wood, metal and glass.
• This universal applicability on a wide variety of substrates makes the films according to the invention usable for a large number of fields of application, for example for the sign industry, for badges, for the card industry, for decorative purposes
• the embossing film according to the invention is used as usual, that is to say, for example, if it is a hot stamping film, transferred to a substrate in a process known per se under the action of pressure and / or heat.
• the advantage of using an embossing film according to the invention is that the application of the decorative layer on the substrate no longer requires any special, expensive tools designed in accordance with the desired pattern.
• the transfer of the decorative layer to the substrate can be carried out by means of large-area tools, for example with the aid of rollers or the like.
• the invention has been explained above in connection with a hot stamping foil, the corresponding decorative layer being a pigmented lacquer layer, but also a metallized or partially metallized layer, which could optionally be equipped with elements having an optical diffraction effect. It would even be conceivable to provide a decorative layer 3 which has already been patterned in a printing or embossing method known per se, in order then to quasi a further, original pattern possibly overlaying variable patterns according to the invention.

Landscapes

• Physics & Mathematics (AREA)
• Optics & Photonics (AREA)
• Decoration By Transfer Pictures (AREA)
• Laminated Bodies (AREA)
• Shaping Of Tube Ends By Bending Or Straightening (AREA)
• Auxiliary Devices For And Details Of Packaging Control (AREA)
• Moulding By Coating Moulds (AREA)
• Extrusion Moulding Of Plastics Or The Like (AREA)
• Duplication Or Marking (AREA)

Applications Claiming Priority (3)

Publications (2)

Family

ID=7786361

Family Applications (1)

Country Status (10)

Families Citing this family (22)

Family Cites Families (11)

• 1997
  • 1997-02-10 DE DE59701935T patent/DE59701935D1/de not_active Expired - Lifetime
  • 1997-02-10 WO PCT/DE1997/000298 patent/WO1997030855A1/fr active IP Right Grant
  • 1997-02-10 AT AT97917228T patent/ATE194104T1/de not_active IP Right Cessation
  • 1997-02-10 AU AU25655/97A patent/AU2565597A/en not_active Abandoned
  • 1997-02-10 EP EP97917228A patent/EP0883499B1/fr not_active Expired - Lifetime
  • 1997-02-10 ES ES97917228T patent/ES2148960T3/es not_active Expired - Lifetime
  • 1997-02-10 JP JP9529703A patent/JP2000506791A/ja active Pending
  • 1997-02-12 ZA ZA9701164A patent/ZA971164B/xx unknown
  • 1997-02-19 MY MYPI97000620A patent/MY115527A/en unknown
• 1998
  • 1998-08-21 US US09/138,170 patent/US6059914A/en not_active Expired - Lifetime

Non-Patent Citations (1)

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