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
• • 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
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T428/00—Stock material or miscellaneous articles
  • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
  • Y10T428/24479—Structurally defined web or sheet [e.g., overall dimension, etc.] including variation in thickness
  • Y10T428/24612—Composite web or sheet

Definitions

• the present invention relates to the field of ornamentation by the technique of transfer by hot pressing, in which a sheet carrying or defining a decorative pattern is pressed by a heated element, such as an iron, on a support of destination.
• a heated element such as an iron
• the invention finds application in the field of personalization of clothing and textile pieces.
• the invention relates to a product for the ornamentation of a support by hot transfer, and a method of manufacturing such a product.
• the technique of hot-pressing transfer is carried out using special products, which are specially developed for this technique and in which a transferable sheet carries or defines the decorative pattern.
• This transferable sheet is generally united to a support sheet on which hot pressing is carried out and which is peelable so that it can be removed at the end of the transfer.
• the securing of the transferable sheet to the destination support may be due to a hot-melt bonding layer, which is heated during the transfer to temporarily melt and which is on the opposite side to the peelable sheet.
• the decorative pattern can be realized by means of printing on the transferable sheet, in which case it must be more precisely a printable sheet.
• the decorative pattern can also be cut from the transferable sheet so as to be defined by the cutting line after the removal of the falls.
• the object of the present invention is at least to increase the aesthetic possibilities for the decoration of substrates, such as textiles, by means of the hot-pressing technique, by allowing a fixed ornamentation employing this technique to define a raised pattern, such as a graining.
• this object is achieved by means of a product for the ornamentation of a support by hot transfer, comprising a transferrable sheet by hot pressing on such a support.
• An embossed pattern is defined by a front face of this transferable sheet which comprises at least one shaped holding layer obtained from a high solids content solution based on polyurethane having a partial polymerization and blocked before term.
• the sheet comprises a reinforcing layer covering said shaped holding layer and resulting from the drying of a solution of fully polymerized polyurethane resin.
• a reinforcing layer makes the sheet more resistant to mechanical stresses and, in particular, opposes premature cracking of this sheet.
• said reinforcing layer defines the front face of the transferable sheet and comprises a surface fraction which differs from an underlying fraction of this reinforcing layer by a different hue and which is located mainly at the level of projecting zones. said front face.
• the transferable sheet comprises a bonding layer to a destination support by hot pressing.
• the bonding layer covers one face of the shaped holding layer.
• the hot transfer ornamentation product comprises a carrier sheet which carries the transferable sheet without covering the hot-melt adhesive layer and which is peelable so as to be dissociable from the transferable sheet once the transfer is made.
• This support sheet may be transparent in order to facilitate the positioning of the transferable sheet before it is fixed by hot pressing.
• the invention also relates to a method of manufacturing a product which is provided for the ornamentation of a support and which comprises a transferable sheet by hot pressing.
• a front face of this transferable sheet defines a relief pattern.
• the method comprises a step in which: b) from a high solids polyurethane solids solution having a partial polymerization and blocked before term, a holding layer is formed in the form of the transferable sheet.
• step b) a film is formed with said high solids content solution, then the film is dried and the polymerization of the polyurethane present in this film is resumed.
• step b) the polymerization of the polyurethane present in said film is resumed by subjecting this film to heating.
• this method comprises a step in which: - AT -
• a reinforcing layer of the transferable sheet is formed.
• the shaped holding layer and the reinforcing layer are formed on each other in steps a) and b).
• the transferable sheet is formed on an impression defining a negative of said relief pattern and the method comprises a step which takes place after step b) and in which: c) the transferable sheet is dissociated from said imprint.
• step b) takes place after step a), in which polyurethane-based polymerized resin solution in the form of a film is deposited on said impression, and this film is then dried.
• step b) takes place after step a), in which polyurethane-based polymerized resin solution in the form of a film is deposited on said impression, and this film is then dried.
• the shaped holding layer is formed on the reinforcing layer in step b).
• a surface fraction of the reinforcing layer is first formed in recessed zones of the impression and, on this superficial fraction, an underlying fraction of the coating layer is then formed. reinforcing, the superficial fraction and the underlying fraction of the reinforcing layer having different hues.
• this method comprises a step which follows step c) and in which: d) the transferable sheet is associated with a peelable support sheet to one another so that this peelable support sheet is on the side opposed to a thermofusible bonding layer constituting the transferable sheet.
• Figure 1 is a schematic cross-section of a portion of a product adapted for use in heat-transfer transfer and according to the invention
• Figure 2 is a schematic diagram of an installation where a heat transferrable sheet is produced for forming part of the product shown in Figure 1
• Figure 3 is a diagram of an installation where the product of Figure 1 is made from the transferable sheet produced in the installation of Figure 2
• Figure 4 is a schematic perspective view of the product of Figure 1 before use
• Figure 5 is a view similar to Figure 4, shows the same product as Figures 1 and 4, and illustrates a preparatory step to the implementation of this product, in a transferrable sheet which has been cut a decorative pattern to be transferred by hot pressing
• FIG. 6 is a schematic view of a garment provided with the decorative pattern visible in FIG. 5 and illustrates an operation that follows the transfer by hot pressing of this decorative pattern.
• FIG. 1 there is shown a product 1 which is intended to be used for decorating a garment by means of a heat-pressing transfer and which comprises two sheets associated one against the other, namely a multilayer sheet 2 transferable by hot pressing and a peelable support sheet 3.
• the front face 4 of the transferable sheet 2 has recessed areas 5 and projecting areas 6, which alternate with each other and which together form a raised pattern.
• This relief pattern is defined by two superposed layers 7 and 8 of the sheet 2. In the example proposed here as a possible way to achieve the invention, it is a graining imitating that of natural leather.
• the layer 7 of the transferable sheet 2 is more precisely a shaped holding layer, intended to prevent heat transfer by transfer of this sheet to remove the pattern in relief, that is to say the graining in the example proposed here. It is made of polyurethane (PU), in a way that will be specified later.
• PU polyurethane
• the layer 8 of the transferable sheet 2 is also made of polyurethane (PU). It is a reinforcing layer which is not made in the same way as the shaped holding layer 7, while being intimately linked thereto by virtue of a chemical compatibility, and whose function is to increase the resistance of the transferable sheet 2 against mechanical stresses such as tractions.
• This reinforcing layer 8 has the particular role of increasing the capacity of the transferable sheet 2 to elongate elastically under the effect of traction and thus oppose the cracking of this transferable sheet 2 after the attached to the garment of destination. It further defines the front face 4, to which it gives a smooth and non-sticky feel.
• the reinforcing layer 8 can be anywhere of the same color, that is to say to have a solid hue. It can also be otherwise. This is the case in the example shown where the hue of the reinforcing layer 8 is not the same in every respect.
• a superficial fraction 9 of the reinforcing layer 8 has a first hue.
• the reinforcing layer 8 has a second hue different from this first hue.
• the transferable sheet 2 comprises a thermofusible bonding layer 11, which may in particular be based on copolyester and which covers the rear face of the shaped holding layer 7, opposite the layer of reinforcement 8.
• This bonding layer 11 is intended to ensure robust attachment of the layers 7 and 8 to the destination textile.
• the support sheet 3 consists of a transparent film which is made of polyethylene terephthalate (PET) and one side of which is adhesive-coated, that is to say provided with an adhesive allowing it to be glued several times to a surface. surface, then peeled off.
• this adhesive-coated face is bonded to the front face 4 of the transferable sheet 2, so that the support sheet 3 is peelable, that is to say separable from this transferable sheet 2.
• the other side of the backing sheet 3 carries a release treatment so as to be easily detached, whereby the product 1 can be rolled up before use, then easily unrolled.
• FIG. 2 A manufacturing facility of the transferable sheet 2 is shown in Figure 2, where arrows indicate the directions of different movements of advance or rotation.
• the layers 7 and 8 of this sheet 2 are made first, according to the so-called "transfer coating” technique, in which a coating is carried out on a temporary support.
• this temporary support consists of a seed paper 12, commonly called transfer paper, a face 13 of which defines a mold cavity.
• This mold cavity has complementary recesses of the projecting zones 6 and complementary bumps of the hollow zones 5. It thus has the form of a graining negative to be defined by the front face 4.
• the paper 12 is a conventional transfer paper, such as that marketed under the reference EMBOSSED DOLARO by the company FAVINI CARTIERA, via November 4, 276 - 28882 CRUSINALLO / OMEGNA (VB) - ITALY.
• a first coating station 20 of the device shown in FIG. 2 serves to deposit a solution 21 on the face 13 of the transfer paper 12.
• This solution 21 contains a completely polymerized polyurethane resin which has a first hue and which is dissolved. in a solvent.
• a squeegee 22 determines the amount of solution 21 left on the face 13 of the transfer paper 12. It is adjusted so as to leave the solution 21 only in the depressions defined by this face 13, that is to say in the complementary recesses of the projecting areas 6.
• the transfer paper 12 enters a first drying oven 23, in which the solvent of the solution 21 is evaporated. At the outlet of the oven 23, the superficial fraction 9 of the reinforcing layer 8 is formed in the recesses of the face 13.
• the surface fraction 9 is distributed in a basis weight which may be, for example, of the order of 10 g / m 2 .
• a solution 21 that gave good results consists of 59% by weight of Larithane sold under the reference MS 128 by NOVOTEX ITALIANA SPA, of 39.4% by weight of dimethylformamide (DMF), of 0.44% by weight black Norene sold under the reference S 1052 by the aforementioned company NOVOTEX ITALIANA SPA, of 1.06% by mass of orange Norene marketed under the reference S3188 by the aforementioned company NOVOTEX ITALIANA SPA and 0.1% by weight of Noresil marketed under the reference S 900 by the aforementioned company NOVOTEX ITALIANA SPA, whose address is via Enrico Fermi, 20 - 20083 GAGGIANO (MI) - ITALY.
• DMF dimethylformamide
• a second coating follows the drying in the oven 23. It takes place at a second coating station 24, where a solution 25 is deposited on the surface fraction 9 and on the still visible areas of the face 13 of the transfer paper. 12. This solution has substantially the same chemical composition as the solution 21, but it is distinguished by the color of its solid fraction.
• a squeegee 26 of the coating station 24 determines the amount of solution deposited, then the assembly passes into a second drying oven 27, where the solvent of the solution 25 is evaporated. After drying, the dry extract deposited solution forms the underlying fraction 10 of the reinforcing layer 8. Its surface weight can then be for example of the order of 30 g / m 2 .
• Solution 29 is a solution with a high solids content, also called “high solid solution” or “high solid solution”, in which the proportion of dry extract based on polyurethane is high compared to that in a normal polyurethane solution such as solutions 21 and 25.
• the portion of the solids content in the high solids content solution is advantageously greater than 70% by weight, preferably greater than 85% by weight, for example of the order of 95% by weight.
• the solution 29 may comprise only 5% by weight of solvent, while the proportion of solvent in the solutions 21 and 25 is of the order of 70% by weight.
• the polyurethane present in solution 29 is partially polymerized, which means that its polymerization has been blocked before term.
• a solution 29 that has given good results consists of 91.41% by weight of UCECOAT SV 201, 6.76% by weight of UCECOAT IT 131, 0.46% by weight of UCECOAT AS 20, 0.46% by weight of UCECOAT R446 / 50, 0.46% by weight of UCECOAT AS 41 and 0.46% by weight of matting agents sold under the reference TS 100 by the company SAFICALCAN, 3, rue Bellini - 92806 PUTEAUX - FRANCE.
• the solution 29 having the composition defined above is colorless.
• the solution 29 can also be tinted, in which case dyes enter into its composition.
• the UCECOAT SV 201, UCECOAT IT 131, UCECOAT AS 20, UCECOAT R446 / 50 and UCECOAT AS 41 products are available from CYTEC - Anderlecht Str 33 - 1620 DROGENBOS - BELGIUM.
• a squeegee 30 determines the amount of solution 29 deposited as a film 31 on the reinforcing layer 8.
• the assembly passes into a drying oven 32, where the solvent of the solution 29 is evaporated. drying, the film 31 may, for example, have a basis weight of the order of 80 to 100 g / m.
• the band leaving the oven 32 is driven to two heating calendering rollers 33, between which it passes.
• the thermofusible bonding layer 11 carried by a temporary film of polyethylene 34 also passes between the calendering rollers 33, which solidify it by heating and pressing the film 31 sec.
• a hot melt layer having given good results as a bonding layer 11 is marketed under the reference FAITERM 104 by the Italian company FAITPLAST, Via Industriale - 25060 CELLATICA (BR) - ITALY.
• the heat provided by the oven 32 and / or that provided by the calendering rollers 33 resume the polymerization of the polyurethane within the film 31, so that this polymerization is completed after the formation of the film 31. Once its polymerized polyurethane the film 31 constitutes the shaped holding layer 7.
• the penultimate operation performed by the installation shown in Figure 2 consists in demolding the transferable sheet 2, dissociating it in 35 of the transfer paper 12. This transferable sheet 2 can then be wound, cut into plates or otherwise packaged.
• the product 1 can be produced from the transferable sheet 2 resulting from the installation of FIG. 2 and from a strip of support sheet 3, in the installation shown in FIG. 3, where arrows indicate direction of advance or rotation.
• the transferable sheet 2 and the support sheet 3 pass together between two calendering rollers 40 which press them against each other so as to adhere the adhesive face of the support sheet 3 to the face
• the two calendering rollers 40 are heated to heat in turn the adhesive on the adhesive side of the carrier sheet 3.
• a sheet of polyethylene terephthalate having given good results as a sheet of support 3 is marketed under the reference ETLl 15142, by the company Bischof + Klein Gmbh - RahestraBe 47 - 49525 Basilrich - Germany.
• Figures 4 and 5 illustrate the first steps of an implementation of the product 1.
• a sample of product 1 on the transferable sheet 2 of which the contours 50 of a decorative pattern to cut 51 are drawn with dots.
• a suitable device such as a graphic cutter also called graphic plotter
• this decorative pattern 51 is cut in the transferable sheet 2, but not in the peelable support sheet 3.
• the falls 52 from its cutting being removed which is illustrated in FIG.
• the transparency of the support sheet 3 facilitates the positioning of the decorative pattern 51 prior to attachment to a garment such as a T-shirt.
• This fixing is done by hot pressing. In a manner known per se, it consists in pressing the decorative pattern 51 not free of the peelable support film 3 against the garment, by using a heating press or an iron. During this, the adhesive layer 11 of the decorative pattern 51 softens or even melts so as to be able to bind to the fibers of the garment of destination.
• the invention is not limited to the embodiment described above.
• the installation shown in Figure 2 can be broken down into several separate subsets, even if the collection of these subsets allows continuous operation.
• the transfer by hot pressing of the transferable sheet 2 or a part thereof can be performed on a destination medium other than a textile, with some adaptations to the scope of the skilled person.
• this destination support may be a dashboard, an interior trim element or a shelf of the passenger compartment of a motor vehicle, or even another accessory of such a cabin.
• the shaped holding layer 7 can be expanded and have a cellular structure.
• an expanding agent can be incorporated in the solution
• the shaped holding layer 7 can be obtained otherwise than by using azodicarbonamide.
• it may be due to microspheres that are introduced into the solution and contain a gas to expand, expanding under the effect of a rise in temperature.

Landscapes

• Laminated Bodies (AREA)
• Decoration By Transfer Pictures (AREA)

Applications Claiming Priority (2)

Publications (2)

Family

ID=39877798

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Family Cites Families (9)

• 2008
  • 2008-05-30 FR FR0853590A patent/FR2931725B1/fr not_active Expired - Fee Related
• 2009
  • 2009-05-25 WO PCT/FR2009/050963 patent/WO2009156634A1/fr not_active Ceased
  • 2009-05-25 EP EP09769475.6A patent/EP2291292B1/de not_active Not-in-force
• 2010
  • 2010-11-30 US US12/956,614 patent/US20110070408A1/en not_active Abandoned

Non-Patent Citations (1)

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