EP3645303B1 - Thermoadhesive label with embossed graphic effects and a method for manufacturing the same - Google Patents

Thermoadhesive label with embossed graphic effects and a method for manufacturing the same Download PDF

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Publication number
EP3645303B1
EP3645303B1 EP19730960.2A EP19730960A EP3645303B1 EP 3645303 B1 EP3645303 B1 EP 3645303B1 EP 19730960 A EP19730960 A EP 19730960A EP 3645303 B1 EP3645303 B1 EP 3645303B1
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EP
European Patent Office
Prior art keywords
face
layer
polyurethane resin
silk
polymeric
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.)
Active
Application number
EP19730960.2A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3645303A1 (en
Inventor
Milena ACATTI
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.)
Stilscreen Srl
Original Assignee
Stilscreen Srl
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Publication date
Application filed by Stilscreen Srl filed Critical Stilscreen Srl
Priority to SI201930008T priority Critical patent/SI3645303T1/sl
Priority to PL19730960T priority patent/PL3645303T3/pl
Publication of EP3645303A1 publication Critical patent/EP3645303A1/en
Application granted granted Critical
Publication of EP3645303B1 publication Critical patent/EP3645303B1/en
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Classifications

    • 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
    • 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
    • B41M3/12—Transfer pictures or the like, e.g. decalcomanias
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M1/00—Inking and printing with a printer's forme
    • B41M1/12—Stencil printing; Silk-screen printing

Definitions

  • the present invention relates to a thermoadhesive label with embossed graphic effects, as well as a method for the manufacturing of the same.
  • the present invention therefore finds its main application in the clothing industry, mainly of the sport type, in particular in the application of labels provided with informative shapes or contents, such as for example crests, symbols, numbers or writings.
  • labels have long been known which, to facilitate fixing the same to the fabric, are provided with an adhesive able to allow adhesion by the transfer following a contextual application of pressure and heat, without the need for stitching; such labels are known as thermoadhesive or transferable labels.
  • an imprinting station has been introduced in the label manufacturing processes which, by means of appropriately engraved drums and due to the pressure of the drum, recreate on a support a predetermined graphic or texture effect, subsequently taken up by the polymeric layer of transfer.
  • the methods for the manufacturing of the labels known up to know provide for the execution of long and expensive processes, not compatible with the requirements of a demanding market both in terms of numbers and of costs.
  • the object of the present invention is therefore to provide a thermoadhesive label and a method of manufacturing of said particularly efficient and economical thermoadhesive label.
  • thermoadhesive label having the technical characteristics of one or more of the subsequent claims from 1 to 4, as well as by a method of manufacturing of a thermoadhesive label having the technical characteristics listed in one or more of the claims from 5 to 11.
  • thermoadhesive label with embossed graphic effects comprises a support element provided with a first face, substantially flat, and a second face having an embossed portion having a predetermined pattern in order to define, on said second face, an alternation of depressions and bulges.
  • embossed portion is made of a catalysed silicon material.
  • the label also comprises a transferable element provided with:
  • the polymeric layer is made of dried single-component polyurethane resin, non-catalysed and non cross-linked.
  • the absence of cross-linking makes the transfer softer and emphasizes the tactile perceptibility of the texture.
  • thermoadhesive label also object of the invention, provides for the manufacturing of the support element by means of:
  • the method then provides to realize the graphic portion of the transferable element on the support element.
  • This step provides for:
  • a manufacturing of an adhesive portion of the transferable element by means of a printing step of a thermoadhesive resin on said graphic portion of the transferable element is provided.
  • the silk-screen printing step of at least one single-component polyurethane resin free of catalysing agents and cross-linking agents provides to print on the second face of the base body a pre-polymerized single-component polyurethane resin dissolved in a solvent; the drying step therefore provides an evaporation of said solvent such as to harden said single-component polyurethane resin.
  • the Applicant has noticed that the use of pre-polymerized monocomponent polyurethane resins and free of any cross-linking agent (as well as of catalysing agents) allows to speed up, simplify and, above all, make the production process more economical, while allowing to obtain a thermoadhesive label with excellent performance features.
  • thermoadhesive label with embossed graphic effects and a method for the manufacturing of the same according what illustrated in the appended figures, wherein:
  • thermoadhesive label indicates a thermoadhesive label according to the present invention.
  • thermoadhesive label is therefore intended to define a multilayer polymeric support, having a predetermined shape and graphic characterization, which can be applied to a fabric T (or other medium) by using pressure and heat, to example by means of the use of an iron or similar industrial device (e.g. heated plates).
  • Such labels find application, as already mentioned initially, in the clothing sector, preferably of a sports type, mainly with the aim of allowing the application of numbers, symbols and sponsorships of different kinds on media such as sweaters, bags, teams, associations or sport clubs accessories.
  • thermoadhesive label 1 is of the type provided with an embossed graphic effect, or a tactile and/or visual texture, and comprises at least one support element 2 and a transferable element 3 (or transfer).
  • the support element 2 therefore defines the base which, upon the transfer on the tissue T, is discarded.
  • the transferable element 3 is instead the actual label which, as a result of the application of pressure and heat, is transferred onto the fabric bringing therewith a predetermined shape, a predetermined graphic layout and a predetermined pattern or texture.
  • pattern reference is made not so much to the graphic/chromatic conformation of label 1, as much to its texture, i.e. to the graphic effect generated due to the appropriate distribution of embossings and recesses that vary the brightness and of the label with the same incidence angle of a bright radiation.
  • the method of manufacturing of the label therefore provides for the preliminary manufacturing of the support element 2.
  • a base body 4 provided with a first face 4a and a second face 4b is provided. These faces 4a, 4b are both flat.
  • the base body 4 is a sheet made of polymeric material, more preferably a polyester.
  • the base body 4 is made of polyethylene terephthalate (PET).
  • a silk-screen printing step of a predetermined pattern is provided on the second face 4b of the base body 4.
  • This printing is carried out with a layer of silicon ink 6 provided with a catalysing agent so as to realize, on said second face 4b, an embossed portion 5 provided with an alternation of depressions 5a and bulges 5b.
  • the printing step is performed in an environment with a stable temperature, preferably not above a predetermined maximum limit (more preferably about 24°C).
  • the thickness of the layer of silicon ink is variable depending on the desired depth for the printed pattern, the more visible and three-dimensional the greater the depth of the depressions 5a with respect to the bulges 5b.
  • the silicon ink is further provided or associated with a cross-linking agent (immersed in a base, for example a solvent).
  • a cross-linking agent immersed in a base, for example a solvent.
  • the silicon ink is also mixed with a catalysing agent.
  • the embossed portion 5 has an increased hardness, which will be useful in the subsequent steps of the method.
  • This step is performed upstream or simultaneously with a drying step of the support element 2, carried out in a suitable oven at a temperature above 120°C, preferably of about 140°C.
  • drying (or desiccation) step is performed in hot air ovens and insulated flat carpet, with the final part arranged for carrying out a cooling at room temperature.
  • the drying time is preferably between 1 minute and 2 minutes, more preferably about one and a half minutes, in order to allow a perfect stabilization of the silicone.
  • a support element 2 is available, provided with a first face 2a substantially flat, and a second face 2b having an embossed portion 5 defining the aforementioned "predetermined pattern".
  • the first face 2a of the support element corresponds to the first face 4a of the base body 4.
  • the second face 2a of the support element 2 corresponds instead to the second face 4b of the base body 4 coated with the layer of silicon ink 6 cross-linked (and catalysed) to define the embossed portion 5 thereof.
  • the "predetermined pattern” corresponds to the negative of the graphic effect that will be visible on the transferable element 3 once applied to the fabric.
  • the transferable element 3 is realized.
  • the transferable element 3 comprises a graphic portion 3a and an adhesive portion 3b overlapped therebetween.
  • the graphic portion 3a is interposed between the support element 2 and the adhesive portion 3b.
  • the manufacturing of the graphic portion 3a of the transferable element 3 provides in the first instance for a manufacturing/depositing step of a polymeric layer 7 on said second face 2b of the support element 2.
  • Such at least a polymeric layer 7 is printed directly onto the second face 2b of said support element 2 and counter-shaped to it to cover its bulges 5b and fill its depressions 5a.
  • such polymeric layer 7 is made of dried single-component polyurethane resin, non-catalysed and non cross-linked.
  • the absence of cross-linking makes the transfer softer and emphasizes the tactile perceptibility of the texture.
  • the reversibility of the non cross-linked polymers allows to recover the resin upon the action of a solvent, resulting in a high ecological compatibility.
  • the method provides at least one silk-screen printing step of at least one single-component polyurethane resin, free of catalysing agents and cross-linking agents, on the second face 4b of the base body 4 (i.e. on the second face 2b of the support element 2).
  • the single-component polyurethane resin is pre-polymerized and dissolved in a solvent (or solvent based).
  • This drying step therefore, evaporates the solvent and hardens the single-component polyurethane resin.
  • the embossed portion 5 has greater hardness than the polymeric layer 7.
  • the graphic portion 3a of the transferable element is multilayer.
  • the silk-screen printing steps of the polyurethane resin and the drying step mentioned above are repeated several times so as to differentiate in appearance and function a plurality of different layers defining the graphic portion 3a.
  • the graphic portion 3 comprises a protective polymeric layer 8 and one or more coloured polymeric layers 9.
  • the protective polymeric layer 8 is printed directly on the support element 2, while the coloured polymeric layers 9 are printed, in succession, on the protective polymeric layer 8.
  • the protective polymeric layer 8 is made of a polyurethane resin printed directly on the second face 2a of the support element 2 and provided with said alternation of depressions 8a and bulges 8b corresponding to those of the support element.
  • the protective polymeric layer 8 develops between two faces, one in contact with the support element 2 and one distal from it, both of which are crimped and counter-shaped to the second face 2b of the support element 2.
  • the manufacturing of the protective polymeric layer 8 provides for a first silk-screen printing step of at least one single-component transparent polyurethane resin and free of catalysing agents and cross-linking agents.
  • such transparent polyurethane resin is pre-polymerized and solvent based.
  • the transparent polyurethane resin is a single-component aliphatic resin.
  • Such transparent polyurethane resin then undergoes a first drying step, carried out at a temperature between 60 and 110°C, preferably of about 90°C.
  • the drying step allows the solvent to evaporate and the resin to dry.
  • the coloured polymeric layers 9 are in turn made with a non-catalysed polyurethane resin and printed in succession so as to be overlapped on each other.
  • Each of said coloured polymeric layers 9 is provided with a flat face 9a distal from the protective layer 8.
  • the first coloured polymeric layer 9, in contact with the protective polymeric layer 8, has a first face counter-shaped and attached to the protective polymeric layer 8 and a second flat face 9a.
  • the sequence and number of layers depend on the graphics and colouring of the transferable element; for example, in the embodiment illustrated in figure 1 there are two coloured polymeric layers 9, each carrying a respective colouring, while in the embodiment in figure 4a, 4b the coloured polymeric layers 9 are four.
  • One or more coloured polymeric layers 9 are realized by one or more second silk-screen printing steps of one or more coloured single-component polyurethane resins, free of catalysing agents and cross-linking agents.
  • these resins are preferably pre-polymerized, and solvent based. More preferably, the coloured polyurethane resin is an aliphatic resin. Such second printing steps are performed so that each of said one or more coloured polymeric layers 9 is provided with a flat face 9a distal from the protective layer 8.
  • one or more corresponding second drying steps performed upon each second printing step and carried out at a temperature between 60 and 110°C, preferably of about 90°C, are provided.
  • drying step allows the solvent to evaporate and the resin to dry.
  • the graphic portion 3a of the transferable element 3 comprises a barrier layer 10 made of a non-catalysed polymeric material printed on said at least one polymeric layer 7.
  • the barrier layer 10 is preferably realized by at least one silk-screen printing step, on said at least one polymeric layer 7, of a polymeric material mixed with carbon powder. Said polymeric material is free of catalysing agents and cross-linking agents.
  • a first new drying step carried out at a temperature between 60 and 110°C, preferably of about 90°C is carried out.
  • drying steps of the polymeric layers described up to this point provide for the use of a tunnel oven where a forced ventilation at room temperature and partial air extraction system ensures the drying of the printing and the expulsion of the vapours (e.g. Wicket oven).
  • the drying time is preferably greater than 90 minutes, more preferably about 2 hours.
  • the presence of the barrier layer 10 allows the transferable element 3a to be covering, which is particularly advantageous in labels designed for an application with sublimation printing.
  • the presence of at least three barrier layers 10 overlapped on one another is provided.
  • the transferable element comprises a further polymeric layer 11 interposed between said at least one polymeric layer 7 and the adhesive portion 3b.
  • the further polymeric layer 11 is therefore printed on the polymeric layer 7 or, depending on the embodiment, on the barrier layer 10.
  • Such further polymeric layer 11 is preferably made of a solvent-based elastic polyurethane, single-component resin and free of catalysing agents. It should be noted that the term “elastic” (or soft) herein is intended to define that the resin has a high modulus, preferably higher than 600 MPa.
  • the method provides a silk-screen printing step of at least one solvent-based elastic polyurethane, single-component resin and free of catalysing agents, on said at least one polymeric layer 7 (i.e. one of the protective polymeric layers 8 and coloured polymeric layer 9) and a subsequent drying step carried out at a temperature between 60 and 110°C, preferably about 90°C.
  • the graphic portion 3a comprises two further polymeric layers 10 overlapped on each other, realized by means of two silk-screen printing steps of the elastic polyurethane resin performed in succession and separated by respective drying steps.
  • a further single polymeric layer 11 is printed directly on the barrier layer 10.
  • the adhesive portion 3b comprises at least one adhesive layer 12 printed on said at least one polymeric layer 7 (being the protective layer 8 or a coloured layer 9) or, preferably, on the further polymeric layer 11.
  • the adhesive layer 12 comprises a thermoadhesive resin.
  • thermoadhesive resin is preferably realized with a mixture of polymeric particles (preferably copolyester) and solvent-based polyurethane resin.
  • such layer is realized by printing said mixture and subsequently drying it in a drying step, preferably carried out at a temperature between 60 and 110°C, more preferably about 90°C.
  • the invention achieves the intended aims and achieves important advantages.
  • the manufacturing of the embossed portion by silk-screen printing of a silicon ink allows great ease in modifying the texture pattern, favouring the production flexibility and reducing the cost of manufacturing of the label.
  • the absence of a cross-linking allows both to significantly reduce the consumption of resin, which, not being cross-linked, can be used for a longer period of time, and to provide a decomposable label if subjected to the action of a predetermined solvent, both of such aspect having a positive impact on the ecological compatibility of the piece.

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  • Printing Methods (AREA)
  • Making Paper Articles (AREA)
  • Adhesives Or Adhesive Processes (AREA)
EP19730960.2A 2018-05-23 2019-05-20 Thermoadhesive label with embossed graphic effects and a method for manufacturing the same Active EP3645303B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
SI201930008T SI3645303T1 (sl) 2018-05-23 2019-05-20 Termolepilna nalepka z reliefnimi grafičnimi učinki in postopek za njeno izdelavo
PL19730960T PL3645303T3 (pl) 2018-05-23 2019-05-20 Etykieta termoadhezyjna z wytłoczonymi efektami graficznymi i sposób jej wytwarzania

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT102018000005618A IT201800005618A1 (it) 2018-05-23 2018-05-23 Etichetta termoadesiva con effetti grafici in rilievo e un metodo per la realizzazione della stessa
PCT/IB2019/054142 WO2019224692A1 (en) 2018-05-23 2019-05-20 Thermoadhesive label with embossed graphic effects and a method for manufacturing the same

Publications (2)

Publication Number Publication Date
EP3645303A1 EP3645303A1 (en) 2020-05-06
EP3645303B1 true EP3645303B1 (en) 2020-07-29

Family

ID=63244801

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19730960.2A Active EP3645303B1 (en) 2018-05-23 2019-05-20 Thermoadhesive label with embossed graphic effects and a method for manufacturing the same

Country Status (10)

Country Link
EP (1) EP3645303B1 (pt)
DK (1) DK3645303T3 (pt)
ES (1) ES2819017T3 (pt)
HU (1) HUE050581T2 (pt)
IT (1) IT201800005618A1 (pt)
LT (1) LT3645303T (pt)
PL (1) PL3645303T3 (pt)
PT (1) PT3645303T (pt)
SI (1) SI3645303T1 (pt)
WO (1) WO2019224692A1 (pt)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102021106085A1 (de) * 2021-03-12 2022-09-15 Leonhard Kurz Stiftung & Co. Kg Transferfolie, ein Verfahren zur Herstellung einer Transferfolie und ein Verfahren zur Herstellung eines mit einer Transferfolie dekorierten Kunststoffartikels

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2762336B1 (fr) * 1997-04-21 1999-06-11 Francois Trantoul Procede de fabrication d'un film a motif non reproductible par lecture optique pour la protection de documents
US9675996B2 (en) * 2014-11-12 2017-06-13 Illinois Tool Works Inc. Embossed heat transfer labels

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
SI3645303T1 (sl) 2020-11-30
WO2019224692A1 (en) 2019-11-28
PL3645303T3 (pl) 2021-02-08
IT201800005618A1 (it) 2019-11-23
HUE050581T2 (hu) 2020-12-28
PT3645303T (pt) 2020-09-18
ES2819017T3 (es) 2021-04-14
EP3645303A1 (en) 2020-05-06
LT3645303T (lt) 2020-09-25
DK3645303T3 (da) 2020-09-07

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