EP4094943A1 - Transferklebeelement verbesserter art und zugehöriges druckverfahren - Google Patents

Transferklebeelement verbesserter art und zugehöriges druckverfahren Download PDF

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Publication number
EP4094943A1
EP4094943A1 EP22020215.4A EP22020215A EP4094943A1 EP 4094943 A1 EP4094943 A1 EP 4094943A1 EP 22020215 A EP22020215 A EP 22020215A EP 4094943 A1 EP4094943 A1 EP 4094943A1
Authority
EP
European Patent Office
Prior art keywords
thermoplastic resin
printed
transfer printing
adhesive thermoplastic
hot transfer
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.)
Pending
Application number
EP22020215.4A
Other languages
English (en)
French (fr)
Inventor
Stefano SCALDAFERRO
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Multi Griffe Srl
Stand Up Srl
Original Assignee
Multi Griffe Srl
Stand Up Srl
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 Multi Griffe Srl, Stand Up Srl filed Critical Multi Griffe Srl
Publication of EP4094943A1 publication Critical patent/EP4094943A1/de
Pending legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F16/00—Transfer printing apparatus
    • B41F16/0006—Transfer printing apparatus for printing from an inked or preprinted foil or band
    • B41F16/004—Presses of the reciprocating type
    • B41F16/0046—Presses of the reciprocating type with means for applying print under heat and pressure, e.g. using heat activable adhesive
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F16/00—Transfer printing apparatus
    • B41F16/0006—Transfer printing apparatus for printing from an inked or preprinted foil or band
    • B41F16/0073—Transfer printing apparatus for printing from an inked or preprinted foil or band with means for printing on specific materials or products
    • B41F16/008—Transfer printing apparatus for printing from an inked or preprinted foil or band with means for printing on specific materials or products for printing on three-dimensional articles
    • 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
    • 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
    • B44C1/172—Decalcomanias provided with a layer being specially adapted to facilitate their release from a temporary carrier
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2219/00—Printing presses using a heated printing foil
    • B41P2219/40—Material or products to be decorated or printed
    • B41P2219/43—Three-dimensional articles

Definitions

  • the Invention is revealed within those printing techniques that use graphic elements called "Transfer” which are suitably adhered to surfaces by heat or other physical processes.
  • Prior Art IT 102021000004850 deposited by the present Inventor, a special support [ Fig.1 , Prior Art IT 102021000004850 ] is claimed on which the elements constituting the Transfer are deposited in successive stages, support also formed by functional elements that go beyond a mere aesthetic characterization.
  • the above-mentioned support is applied on the surface to be printed by some flexible hot pads similar to those used in pad printing techniques.
  • the actual graphic element, that comes to move on the surface to be printed, is equipped with adhesive characteristics [Patent Application IT 102021000004850 , chapter 028], such as to allow grip on that surface; however, in printing of special small graphic elements, or in applications on curved surfaces that are difficult to process, this adhesive characteristic of the graphic element of the Transfer may not be particularly suitable.
  • they may also be surfaces made of materials that are refractory to non-strictly specified adhesives, on which it is necessary to work with improved adhesives.
  • Prior Art IT 102021000004850 is also claimed the possibility of applying these specific glues on the graphic element of the Transfer itself, even if this solution does not include all the possible variants of a Transfer graphic print, for example the one in which the above-mentioned print is constitute only by a pigment and not by a graphic element provided with its own physicality and consistency.
  • the Application DE302274 show a pad printing process for a graphic element placed on transfer support, made by pressure and high temperature; the Application EP2048001A1 show also a transfer element printing process while the Application US7906189B2 show a transfer element wherein there are a different kind of layer with adhesive and chromatics features. Such applications however don't reveal further technical elements to improve the printing process.
  • the purpose of the present Invention is to claim a new printing system and an improved Transfer-type Device which can simplify and make more efficient the printing process in particular fields of application where high performance, high productivity, short processing times and a large integration in industrial processes are required.
  • the Invention reveals a new Transfer device that brings together some refined features aimed at increasing press performance, productivity and speed in industrial pressing processes. All of this is possible thanks to the realization of a Device in which the substance imparting the adhesive property is first deposited in a substrate and then transferred by heat from the above-mentioned support to the surface to be printed without the elements of colouring and pigmentation, which will be added later during the printing process.
  • an additional pigmented sheet is adhered on top of the adhesive layer, anchored to the surface to be printed and which will retain, from the said pigmented sheet, the colourings that will create the desired element, colourings that will only adhere on the section of surface circumscribed by the adhesive itself.
  • a support of suitable material preferably Polyester, Polyurethane or Polypropylene, is prepared in the form of a thin sheet that acts as a support (20) for subsequent elements and subsequent processing that constitute the improved Transfer printing Device.
  • the main element that constitutes the idea of the Invention is a deposit, on the support sheet, of a suitable transparent adhesive thermoplastic resin, slavishly identical in shape to the shape of the graphic element to be printed on the chosen surface. So, according to the idea of the Invention, the adhesive element of the Transfer is separately processed from the Transfer complete with chromatic characteristics.
  • the thickness of the material, Polyester, Polyurethane or Polypropylene, constituting the support sheet can vary from 35um (10 -6 meters) to 150um (10 ⁇ -6 meters), that is a thickness that allows adequate flexibility but also adequate robustness in relation to the different fields of use. Preferably, this thickness ranges from 50um (10 -6 meters) to 100um (10 -6 meters).
  • This support sheet can be profitably realized in the form of a continuous ribbon wound on a reel (21) because the above-mentioned layout is typical and in use in graphic printing machines in industrial production processes, for example pad printing or transfer printing.
  • Release made up of a chemical formulation with synthetic cross-linked resins by Ultraviolet rays (30)(31).
  • the Release material is specifically designed to ensure that the transparent adhesive thermoplastic resin element that will be added upon it later can be quickly detached during the printing process, on average in a time between 300ms (10 -3 seconds) and 800ms (10 -3 seconds). This makes the printing process extremely fast.
  • the Release material layer then, allows the detach of the transparent adhesive thermoplastic resin element while the temperatures generated by contact with the appropriate mechanical printing medium, for example a heated and flexible pad or a metal punch, are still high.
  • the transparent adhesive thermoplastic resin element upon the Release material layer is added the transparent adhesive thermoplastic resin element itself.
  • the perimeter shape of the resin deposit will slavishly follow that of the graphic element to be printed (40) (41), thus creating a sort of adhesive base for the pigments that will be added by means of the subsequent stages of the process resulting from the present Invention.
  • the transparent adhesive thermoplastic resin element illustrated in Fig.4 has been highlighted in order to be visible in the drawing table of this Application.
  • a unique visual recognition element or Marker (60) (61) is inserted in each Transfer element.
  • This element identifies the exact position of the Transfer on the support sheet and it is used by the printing machine to position the same sheet correctly on the surface to be printed, that is to say consistently with the spatial coordinates inserted in the printing machine programming.
  • the Marker element can contain information encoded using alphanumeric or graphic characters, for example using a QR code technology, such as to allow an interaction with the machine and therefore with IT management of industrial processes.
  • a QR code technology such as to allow an interaction with the machine and therefore with IT management of industrial processes.
  • Such integration is typical of Industrial Processes 4.0.
  • An example is given by the procedure for the exact identification of the Transfer to be printed, encoded in the Marker element and read by the printing machine by means of sensor and/or camera.
  • the Marker element can also incorporate passive or active technical solutions, even for mono or bidirectional data communication between the printing machine and Transfer according to the idea of the Invention, for the control of the printing process.
  • the above-mentioned Marker element can integrate a passive chemical temperature sensor for storing the maximum temperature reached by the Transfer during the printing process; this allows the acquisition of industrial process data suitable for printing quality control.
  • Fig.7 two Marker elements are visible, that indicate different temperature ranges of the completed printing process:
  • the "x” element (71) shows an indication given by the compliant colour type while the "y” element (70) shows an indication given by the non-compliant colour, for example out of the temperature range allowed by the pre-defined printing process.
  • the Transfer result of the present Invention, is then applied (82) on the chosen surface by means of a profitable mechanical mean of contact (for example a flexible and heated tab, a mechanical punch, a heated plate etc.).
  • a profitable mechanical mean of contact for example a flexible and heated tab, a mechanical punch, a heated plate etc.
  • the surface to be printed is represented by the upper of a shoe.
  • the Transfer which is the subject of the present Invention, is made in the form of a support ribbon wound onto rotating spools loaded during the machine setup, that is provided with suitable traction engines that allow unwinding/rewind the support sheet containing the Transfer, that is the transparent adhesive thermoplastic resin deposit upon the Release material layer.
  • the transparent adhesive thermoplastic resin element illustrated has been highlighted for the purpose to be visible on the drawings table of this Application; its correct position on the support sheet is, indeed, the opposite surface to the one visible in Fig.8 .
  • the transparent adhesive thermoplastic resin element will be transferred to the upper of the shoe (90).
  • the transparent adhesive thermoplastic resin element portrayed in Fig.9 has been highlighted for the purpose to be visible on the drawings table of this Application.
  • this part of the process consisting of the detachment of the adhesive resin, takes between 300ms and 800ms, thus considerably speeding up the entire process.
  • the printing machine by means of special translating devices, moves the Transfer ribbon from the working position and put in the same working area a pigmented sheet, already known on the State of the Art printing technology.
  • the process by contacting the printing mechanical means is repeated using the pigmented sheet.
  • the colouring present on this sheet (91), under the pressure of the printing mechanical means (92) will be permanently transferred to the area defined by the transparent adhesive thermoplastic resin (90), thus completing the printing of the Transfer on the shoe upper (100).
  • the colourings of the pigmented sheet have been made visible in transparency on the opposite side of the sheet to facilitate understanding of the technique according to the Invention; the correct position of the pigmentations on the sheet, in fact, is the opposite surface to the one visible in Fig.9 .
  • the special Release treatment which allows the detachment of the transparent adhesive thermoplastic resin in times between 300ms and 800ms, can be optionally replaced with a different formulation, already known by the State of the Art, that allows a detachment of the adhesive element from the sheet only when the temperature returns to values consistent with the ambient ones, for example 20/25 c°.
  • This so-called "cold” technique while not allowing high-speed printing procedures, can nevertheless benefit from the technique described here in terms of precision and print quality.
  • pigmented sheets capable of releasing their colourings without the aid of high temperatures can be used, so only thanks to the adhesion of the transparent adhesive thermoplastic resin, thus avoiding the use of heated printing mechanical means.
  • Fig. 12 the insole of a footwear assembly (120) is printed using the Transfer of the present Invention (121): A self-propelled mechanical punch (122) exerts adequate pressure on the Transfer, allowing the transparent adhesive thermoplastic resin (123) to adhere to the surface of the insole once it is detached from the Release treatment (124). Then, a pigmented sheet is used (125), that will release the colouring in the area delimited by the adhesive thermoplastic resin, always by the pressure exerted by the same self-propelled mechanical punch.
  • the illustrated transparent adhesive thermoplastic resin element and the colouring of the pigmented sheet have been highlighted in transparency to be visible in the drawings table of the present Application; the correct position is, in fact, on the opposite surface to the one visible in Fig.12 .
  • pad printing device with accentuated flexibility characteristics is preferable when the surface to be printed is not perfectly flat, that is curved or irregular.
  • the adhesive thermoplastic resin may be formulated with a particular colouring, so not transparent but with a range of pigmentations such that it is a part of the overall colour effect of the Transfer printing according to the idea of the invention, when subsequently completed using the pigmented sheet.
  • this technical variant allows a sort of realization process of the colours of the Transfer through the use of two overlapping pigmentations levels, one included in the adhesive thermoplastic resin and the other in the pigmented sheet, in order to obtain an overall graphic effect with more resolution, sharpness and quality in the colours, as well an improved resistance to abrasion and wear.
  • the deposit of the adhesive thermoplastic resin element on the support sheet may coincide with a further deposit by screen printing or other similar technique, with additional graphic elements (110) (111) which, together with the adhesive thermoplastic resin, complete the Transfer element.
  • additional graphic elements will be transferred to the surface to be printed during the printing process as they have a special adhesive characteristic when processed by the printing mechanical means.
  • the Device result of the present Invention, finds application in all those Transfer type printing techniques used today in a wide range of industrial and craft activities, particularly in leather and fashion, footwear and its accessories, textiles etc.
  • the technique revealed in this Invention is profitably applicable in all areas of graphic design at a professional level on many types of surfaces, both synthetic (plastics, for example) and natural (leather, glass etc.).

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Decoration By Transfer Pictures (AREA)
  • Adhesives Or Adhesive Processes (AREA)
EP22020215.4A 2021-05-25 2022-05-10 Transferklebeelement verbesserter art und zugehöriges druckverfahren Pending EP4094943A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT102021000013514A IT202100013514A1 (it) 2021-05-25 2021-05-25 Elemento adesivo Transfer di tipo perfezionato e relativo procedimento di stampa

Publications (1)

Publication Number Publication Date
EP4094943A1 true EP4094943A1 (de) 2022-11-30

Family

ID=77412130

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22020215.4A Pending EP4094943A1 (de) 2021-05-25 2022-05-10 Transferklebeelement verbesserter art und zugehöriges druckverfahren

Country Status (2)

Country Link
EP (1) EP4094943A1 (de)
IT (1) IT202100013514A1 (de)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE302274C (de)
DE3022744A1 (de) * 1979-07-19 1981-02-19 Barta Franz Kg Markierungsmaterial in der art von abziehbildern zur anbringung einer markierung, eines bildes o.dgl. an einem textilen gegenstand
EP2048001A1 (de) 2007-10-11 2009-04-15 DeMaxZ AG Aufbringung eines Dekors auf einen Gegenstand mit einer Klebefolie, auf welche zuvor das Dekor im Release-Verfahren aufgebracht ist
US7906189B2 (en) 2002-12-02 2011-03-15 Avery Dennison Corporation Heat transfer label for fabric with thermochromic ink and adhesive surface roughness

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE302274C (de)
DE3022744A1 (de) * 1979-07-19 1981-02-19 Barta Franz Kg Markierungsmaterial in der art von abziehbildern zur anbringung einer markierung, eines bildes o.dgl. an einem textilen gegenstand
US7906189B2 (en) 2002-12-02 2011-03-15 Avery Dennison Corporation Heat transfer label for fabric with thermochromic ink and adhesive surface roughness
EP2048001A1 (de) 2007-10-11 2009-04-15 DeMaxZ AG Aufbringung eines Dekors auf einen Gegenstand mit einer Klebefolie, auf welche zuvor das Dekor im Release-Verfahren aufgebracht ist

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IT202100013514A1 (it) 2022-11-25

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