EP3991982B1 - Verfahren zur dekoration eines gleitbretts und gleitbrett welches auf seiner sichtbaren seite ein dekoriertes verbundmaterial trägt - Google Patents

Verfahren zur dekoration eines gleitbretts und gleitbrett welches auf seiner sichtbaren seite ein dekoriertes verbundmaterial trägt Download PDF

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Publication number
EP3991982B1
EP3991982B1 EP21204870.6A EP21204870A EP3991982B1 EP 3991982 B1 EP3991982 B1 EP 3991982B1 EP 21204870 A EP21204870 A EP 21204870A EP 3991982 B1 EP3991982 B1 EP 3991982B1
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EP
European Patent Office
Prior art keywords
resin
ink
grains
composite material
transfer film
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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
EP21204870.6A
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English (en)
French (fr)
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EP3991982A1 (de
Inventor
Emanuele CASSIBBA
Grégory Merle
Jacky Christoud
Thierry Monnet
Frédéric LECLERCQ
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.)
Skis Rossignol SA
Original Assignee
Skis Rossignol SA
Rossignol SA
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Publication date
Application filed by Skis Rossignol SA, Rossignol SA filed Critical Skis Rossignol SA
Publication of EP3991982A1 publication Critical patent/EP3991982A1/de
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Classifications

    • 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
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/025—Duplicating or marking methods; Sheet materials for use therein by transferring ink from the master sheet
    • B41M5/03—Duplicating or marking methods; Sheet materials for use therein by transferring ink from the master sheet by pressure
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63C—SKATES; SKIS; ROLLER SKATES; DESIGN OR LAYOUT OF COURTS, RINKS OR THE LIKE
    • A63C5/00—Skis or snowboards
    • A63C5/003—Structure, covering or decoration of the upper ski surface
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63C—SKATES; SKIS; ROLLER SKATES; DESIGN OR LAYOUT OF COURTS, RINKS OR THE LIKE
    • A63C5/00—Skis or snowboards
    • A63C5/12—Making thereof; Selection of particular materials
    • A63C5/124—Selection of particular materials for the upper ski surface
    • 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
    • B41M5/025—Duplicating or marking methods; Sheet materials for use therein by transferring ink from the master sheet
    • 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
    • B41M5/025—Duplicating or marking methods; Sheet materials for use therein by transferring ink from the master sheet
    • B41M5/0256—Duplicating or marking methods; Sheet materials for use therein by transferring ink from the master sheet the transferable ink pattern being obtained by means of a computer driven printer, e.g. an ink jet or laser printer, or by electrographic means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
    • B44C5/00—Processes for producing special ornamental bodies
    • B44C5/005—Processes for producing special ornamental bodies comprising inserts

Definitions

  • the invention relates to the field of boards for sliding on snow or water, and in particular alpine, cross-country or touring skis, or even snowboards or wakeboards.
  • the invention relates more particularly to a gliding board including on its visible face a decorated composite material as well as the associated manufacturing process.
  • the invention has the advantage of allowing the production of a decoration on the gliding board without integrating an additional layer supporting the decoration. In the case of gliding boards, this realization notably allows an interesting weight saving.
  • a ski is identified by the different markings and patterns present on the visible side of the ski. For example, it is possible to identify the brand of the ski, its model as well as various information relating to the size of the ski and the adjustment of the shoe retaining members. Furthermore, the decor makes it possible to give an advantageous aesthetic appearance.
  • the document EP 0 774 365 proposes a process for decorating a sliding board made of hardened composite material.
  • a layer of transparent plastic material is previously decorated on its underside by transfer of sublimable inks, then is glued to the surface of the composite material.
  • the product obtained includes an additional layer which adds to the overall weight of the board.
  • this is not sought after in the context of gliding boards, which must be ever lighter to improve their behavior on snow.
  • the document US 6,004,900 describes a sporting article, typically a hockey stick, comprising an outer layer of hardened composite material, the resin of which contains light-colored pigments.
  • the decoration is printed on the article by sublimation of an ink into the surface layer of the composite material. Sublimation takes place upon the application of certain pressure and temperature conditions of around 160 to 180°C, allowing the ink to temporarily pass into the gaseous state. However, during its sublimation, the ink in the gaseous state diffuses into the resin so that the contours of the decoration obtained are not clear.
  • An example of ink diffusion is shown in figure 1 below, on which we observe a continuous sheet of ink 31, which gradually melts into the resin 23, a sign that the ink 31 diffuses into the resin 23.
  • the process requires previously mixing color pigments clear with resin, otherwise the sublimated ink lacks contrast. However, this additional step complicates the process. It is also impossible to obtain white solid areas directly by sublimation.
  • the document US 5,718,792 presents a process for decorating a ski pole made of hardened composite material.
  • a pre-printed decoration sheet with sublimable ink is applied to the surface of the stick.
  • the assembly is heated, for example, to a temperature of approximately 210°C for 60 to 80 seconds, to allow the ink to pass directly into the gaseous state. by sublimation of the decoration into the stick.
  • the transferred decoration does not have a clear appearance, because the ink diffuses into the resin, particularly in the case of a curved surface, since positioning the pre-printed decoration sheet on the stick is a delicate step and not very reproducible.
  • the high temperatures applied in processes using sublimation are incompatible with applications on articles including materials sensitive to heat, such as for example the polyethylene sliding soles on a ski.
  • the technical problem that the invention proposes to solve is therefore to develop a process for manufacturing a gliding board for which the decoration printed on the composite material of the gliding board forms the least excess thickness possible and is clear. and does not diffuse into the resin, while being resistant to wear and external aggression.
  • the “curable” resin can be a resin commonly described as thermosetting, that is to say which hardens by crosslinking when the temperature and pressure conditions are applied.
  • the resin may be a thermoplastic resin, which hardens upon cooling, after having been softened by application of appropriate pressure and temperature conditions.
  • the transfer film is made from a material chosen from polyolefins. This family of materials has good properties of lightness and resistance to cracking and tearing.
  • the adhesion force between the grains and the film is sufficiently significant so that the pattern does not move on the film during the movement and positioning of the transfer film in contact with the resin.
  • the adhesion force between the ink grains and the resin is preferentially greater than the adhesion force between the ink grains and the transfer film.
  • the invention relates to a gliding board obtained by the method according to the first aspect of the invention.
  • the gliding board includes on its visible side a decorated composite material, formed of a fibrous layer coated with hardened resin.
  • Such a gliding board is characterized in that said decorated composite material comprises a pattern composed of an arrangement of grains of at least one type of ink, said ink comprising dyes and a crosslinked polymer, these grains being encrusted in the surface layer of the hardened resin of the composite material.
  • “encrusted” means that a portion of the volume of the ink grain is encompassed by the resin.
  • a significant portion, ideally a majority, of the external surface of the grain is in contact with the resin.
  • the grain can be completely embedded and isolated in the resin or its upper surface can protrude into the open air or at least one of its lateral zones can be contiguous with another grain.
  • the ink grains do not enter inside the fibrous layer, which makes it possible to maintain the mechanical resistance properties of the composite material.
  • the decoration is inlaid in a very thin thickness of resin.
  • the ink grains are completely covered by the resin, they remain clearly visible through transparency and have clear and precise contours.
  • the decor is protected by the resin which surrounds it and resists mechanical and chemical attacks. This also provides better resistance to abrasion and tearing.
  • the polymer constituting the ink is chosen from the group including polyacrylates, polyacrylics and polyurethanes. Inside the decoration affixed to the gliding board, these polymers are in reticulated form, so that the ink grains are in a solid state and adopt a three-dimensional configuration. Unlike state-of-the-art gliding boards, all dye colors can be used, even white, while maintaining sufficient contrast with the resin to clearly distinguish the decor.
  • an ink grain has a diameter, or generally a larger dimension, of between 10 and 100 ⁇ m. These dimensions are chosen so that the grain thickness is ideally smaller than the supernatant resin thickness, in order to be properly encompassed by the resin. The diameter is also chosen so that the grain is large enough to be properly distinguished through the resin layer. Furthermore, the dimensions are also chosen to guarantee the aesthetic appearance of the decor and to obtain the best possible resolution within the limits of the constraints mentioned above.
  • THE figures 2, 3 And 6-10 are not represented to scale to facilitate the reader's understanding.
  • the thickness of the supernatant layer of resin 13 is exaggerated to illustrate the phenomena which take place within this layer.
  • the shape of the ink grains 11 , 21 is schematized by a generally rectangular shape, which is not necessarily representative of the real shape of the grains 11 , 21 .
  • a composite material 15 is typically formed of a fibrous layer 14 of glass, carbon, basalt fibers or natural fibers, long or short, unidirectional or oriented or even made of a non-woven, for example based on threads polyester.
  • the fibrous layer 14 is impregnated with thermosetting resin 13 , for example an epoxy resin, or thermoplastic, such as a polyamide resin.
  • the resin 13 has a supernatant portion above the fibrous layer 14 . This supernatant portion of resin 13 has a thickness of a few micrometers.
  • the figure 2 has only one type of grain 11 , distributed over two superimposed layers, corresponding to an ink of a single given color.
  • the Figure 3 also has two superimposed layers.
  • the first layer is composed of a first type of grains 21 and the second layer is composed of another type of grains 11 , typically of different colors.
  • the grains 11 , 21 have a substantially rounded appearance, of a solidified and/or dried droplet.
  • the type of a grain 11 , 21 varies depending on the ink used, typically the nature of the polymer or the dye can vary.
  • the ink used is an ink in solid and non-sublimable form, which does not change to a liquid state or to gaseous state when heated. On the contrary, if we heat the ink composing a grain 11 , 21 , it is irremediably degraded, or even burns and carbonizes.
  • the ink is for example composed of a crosslinked polyurethane, polyacrylate or polyacrylic polymer.
  • the decoration obtained is precise and clean, since the grains 11 , 21 do not diffuse into the resin.
  • THE figures 1 And 4 make it possible to compare a product obtained thanks to the principle of the invention, visible on the figure 4 , and a product obtained by sublimation of ink in the resin, visible on the figure 1 .
  • the sliding board can be decorated in this way on all its sides and even on surfaces with particular geometries, such as curved surfaces.
  • the composite reinforcement extends laterally on the edges of the ski, it is possible to decorate the top and the edges of a ski continuously, without loss of precision or deformation of the decoration at the angles or curves.
  • a gain of 40g on a 550g cross-country ski was achieved by the Applicant by replacing a decoration by adding material with the decoration method of the invention.
  • the first step 210 is the preparation of a transfer film 12 .
  • the transfer film 12 is a thin sheet, made of a flexible and deformable material, typically belonging to the polyolefin family.
  • the transfer film 12 For three-dimensional sliding boards whose surface includes edges delimiting distinct zones, not necessarily coplanar, there is an advantage in using a transfer film 12 which has a stretching capacity.
  • the transfer film 12 has an elongation upon cracking of between 60 and 100% of its initial surface area. Otherwise formulated, the transfer film 12 can extend up to twice its initial size before cracking.
  • the transfer film 12 has at least one face having a roughness intended to mechanically retain the grains 11 , 21 of the decoration.
  • the roughness is chosen to allow the pattern to be held in place on the transfer film 12 , without migration during the movement and positioning of the transfer film 12 on the surface of the resin, especially since the decorated face of the film transfer 12 is oriented downwards during molding of the board.
  • the roughness is also chosen to limit the contact surface with the grains 11 , 21 , so that these transfer into the resin 13 when a predetermined pressure is applied to the transfer film 12 .
  • the average roughness Ra is between 2 and 5 ⁇ m, preferably close to 3 ⁇ m.
  • the average roughness Ra is obtained by calculating the average difference between the peaks and valleys of the roughness profile of the transfer film 12 .
  • the maximum roughness Rz corresponds to the absolute vertical difference between the maximum height of the peaks and the maximum depth of the valleys over a predetermined length.
  • the maximum roughness Rz is between 15 and 30 ⁇ m, typically close to 23 ⁇ m.
  • Inkjet printing is carried out by a printer comprising print heads allowing drops of liquid ink to be deposited on the surface of the transfer film 12 with a linear resolution of between 200 and 500 dpi, typically 360dpi, or approximately 130,000 drops per square of 2.54 cm side, or approximately 20,000 drops per cm 2 .
  • the diameter of the drops deposited is between 10 and 100 ⁇ m, typically 24 ⁇ m.
  • the dimensions of the drops and grains can be measured by traditional image analysis techniques, from images similar to that of the figure 4 .
  • the ink usually contains a light polymerizer. After depositing the drops of ink on the transfer film 12, they are exposed to UV light making it possible to initiate the polymerization and/or crosslinking of the ink. Thus, the ink is frozen and in a solid, stable and irreversible state.
  • the inks from the ALTAMIRA DESIGN DP ® range, marketed by the AGFA Company, or the inks from the UVIJET KO ® range from the FUJIFILM Company can be used for inkjet printing.
  • the ink chosen also has a certain malleability after polymerization, as well as a chemical nature which allows it not to crack during deformation of the transfer film 12 and not to be denatured in contact with the resin 13 .
  • screens comprising holes with a diameter of between 10 and 100 ⁇ m, typically 40 ⁇ m, are arranged facing the transfer film 12 .
  • the linear resolution is between 50 and 150 dpi, typically 120dpi, or approximately 15,000 drops per square of 2.54 cm side, or approximately 2300 drops per cm 2 .
  • the ink layer can be composed of several passes of ink grains 11 , 21 of several types.
  • the transfer temperatures described above are compatible with the use of polyethylene type materials, generally constituting the sliding soles of skis. In the extreme, the temperature can even be room temperature, but the curing time of the resin is then much longer.
  • thermoplastic resin 13 For a thermoplastic resin 13 , it is in the solid state before the pressure and temperature conditions are applied to the gliding board. The increase in pressure and temperature makes it possible to soften the thermoplastic resin 13 . It is in this phase that the grains 11 in the solid state composing the decoration will become embedded in the softened resin 13 . Then, the cooling phase allows the return of the assembly formed by the resin 13 encrusted with grains 11 to the solid state.
  • thermoplastic resin In the case of a thermoplastic resin, one can also imagine transferring the pattern into the composite 15 before molding. To do this, pressure and temperature conditions allowing the softening of the thermoplastic resin must be previously applied to the assembly formed by the impregnated composite 15 and the transfer film 12 . Subsequently, during molding, the thermoplastic resin may still soften, while retaining the pattern as transferred.
  • the invention advantageously makes it possible to obtain a gliding board with a clean decoration, exhibiting little or no deformation and which is resistant to external aggression.
  • the manufacturing process for such a board is versatile and allows multiple decorations to be obtained with lots of contrast and without limitation in terms of colors.
  • the feel can be modified to improve the grip of the gliding board.

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  • Laminated Bodies (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)

Claims (16)

  1. Verfahren zur Dekoration eines Gleitbretts, welches auf seinem sichtbaren Teil ein Verbundmaterial (15) trägt, bestehend aus einer mit einem härtbaren Harz (13) beschichteten Faserlage (14), dadurch gekennzeichnet, dass dieses Verfahren die folgenden Schritte umfasst:
    - Herstellung einer Übertragungsfolie (12), umfassend eine mit einem Muster bedeckte Seite, bestehend aus einer Körnchenanordnung (11, 21) mindestens eines Typs Tinte, diese Tinte enthält Farbstoffe und ein vernetztes Polymer,
    - Positionierung der mit dem Muster bedeckten Seite der Übertragungsfolie (12) auf der gesamten oder auf Teilen der Außenseite des Verbundmaterials (15),
    - Anwendung der Druck- und Temperaturbedingungen, die zur Erweichung oder/ dann zur Härtung des Harzes (13) führen, so dass die Körnchen (11, 21) des Musters zumindest teilweise in die oberflächliche Schicht des Verbundmaterial (15) eingebettet werden, unter Wahrung der Anordnung der Körnchen (11, 21), die auf der Übertragungsfolie (12) vorbereitet sind, und
    - Abziehen der Übertragungsfolie (12).
  2. Dekorationsverfahren nach Anspruch 1, dadurch gekennzeichnet, dass es einen Schritt der Positionierung des Verbundmaterials (15) in einer Form enthält, die Druck- und Temperaturbedingungen, die zur Erweichung oder/ dann zur Härtung des Harzes (13) führen, werden auf diese Form angewandt.
  3. Dekorationsverfahren nach Anspruch 1, dadurch gekennzeichnet, dass das Verfahren außerdem einen Schritt der Vernetzung des Polymers, aus dem die Tinte besteht, enthält.
  4. Dekorationsverfahren nach Anspruch 1, dadurch gekennzeichnet, dass die Temperatur, die zur Erweichung oder/ dann zur Härtung des Harzes (13), führt, kleiner oder gleich 120°C ist.
  5. Dekorationsverfahren nach Anspruch 1, dadurch gekennzeichnet, dass die Übertragungsfolie (12) verformbar ist, das heißt, dass sie sich biegen und/ oder ausdehnen kann, um sich an die dreidimensionale Geometrie der Außenfläche des Verbundmaterials (15) anzupassen.
  6. Dekorationsverfahren nach Anspruch 1, dadurch gekennzeichnet, dass die Übertragungsfolie (12) aus einem Material ausgeführt, wird, dass aus den Polyolefinen ausgewählt wird.
  7. Dekorationsverfahren nach Anspruch 1, dadurch gekennzeichnet, dass die Haftkraft zwischen den Tintenkörnchen (11, 21) und dem Harz (13) höher ist, als die Haftkraft zwischen den Tintenkörnchen (11, 21) und der Übertragungsfolie (12).
  8. Dekorationsverfahren nach Anspruch 1, dadurch gekennzeichnet, dass die Erweichungstemperatur der Übertragungsfolie (12) höher ist, als die Temperatur, die zur Erweichung oder/ dann zum Härten des Harzes (13) führt.
  9. Gleitbrett, das Gegenstand des Verfahrens nach einem der Ansprüche 1 bis 8 ist, dadurch gekennzeichnet, dass dieses dekorierte Verbundmaterial (15) ein Muster, bestehend aus einer Anordnung von Körnchen (11, 21) mindestens eines Tintentyps enthält, wobei diese Tinte Farbstoffe enthält und ein vernetztes Polymer, diese Körnchen (11, 21) sind eingebettet in die Oberflächenschicht des gehärteten Harzes (13) des Verbundmaterials (15).
  10. Gleitbrett nach Anspruch 9, dadurch gekennzeichnet, dass das Harz (13) ein thermoplastisches oder ein wärmehärtbares Harz ist.
  11. Gleitbrett nach Anspruch 9, dadurch gekennzeichnet, dass das Polymer ausgewählt wird aus der Gruppe mit den Polyacrylaten, Polyacrylen und Polymeren.
  12. Gleitbrett nach Anspruch 9, dadurch gekennzeichnet, dass die Zahl der vorhandenen Körnchen (11, 21) pro Flächeneinheit des dekorierten Verbundmaterials zwischen 387,5 Punkten pro cm2 (2500 Punkte pro Quadratzoll) und 99200 Punkten pro cm2 (640 000 Punkte pro Quadratzoll), vorzugsweise zwischen 1550 Punkten pro cm2 (10000 Punkte pro Quadratzoll) und 24800 Punkten pro cm2 (160000 Punkte pro Quadratzoll) liegt.
  13. Gleitbrett nach Anspruch 9, dadurch gekennzeichnet, dass das Verhältnis der von den Körnchen (11, 21) bedeckten Fläche zu einer einfarbigen Fläche zwischen 20% und 75%. liegt.
  14. Gleitbrett nach Anspruch 9, dadurch gekennzeichnet, dass ein Tintenkörmchen (11, 21) eine größere Diemnsion zwischen 10 und 100 µm hat.
  15. Gleitbrett nach Anspruch 9, dadurch gekennzeichnet, dass das Muster auf die dreidimensionale Außenfläche des Verbundmaterials (15) gedruckt ist.
  16. . Gleitbrett nach Anspruch 9, dadurch gekennzeichnet, dass das Muster die Oberseite des Gleitbretts bedeckt.
EP21204870.6A 2020-10-28 2021-10-26 Verfahren zur dekoration eines gleitbretts und gleitbrett welches auf seiner sichtbaren seite ein dekoriertes verbundmaterial trägt Active EP3991982B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR2011029A FR3115493A1 (fr) 2020-10-28 2020-10-28 [titre] article incluant sur sa face visible un materiau composite decore et procede associe

Publications (2)

Publication Number Publication Date
EP3991982A1 EP3991982A1 (de) 2022-05-04
EP3991982B1 true EP3991982B1 (de) 2023-12-13

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EP21204870.6A Active EP3991982B1 (de) 2020-10-28 2021-10-26 Verfahren zur dekoration eines gleitbretts und gleitbrett welches auf seiner sichtbaren seite ein dekoriertes verbundmaterial trägt

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US (1) US11840106B2 (de)
EP (1) EP3991982B1 (de)
FR (1) FR3115493A1 (de)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2741008B1 (fr) 1995-11-15 1998-01-30 Salomon Sa Procede de decoration d'un article composite du type ski, surf ou planche a roulette
US5718792A (en) 1996-02-29 1998-02-17 Goode Ski Technologies Method for decorating ski pole shafts
US6004900A (en) 1997-08-22 1999-12-21 Fiberspar, Inc. Composite article for sublimation-printing and method of manufacture
DE10249223A1 (de) * 2002-10-22 2004-05-13 Helmut Szynka Verfahren zum Aufbringen eines Farbdekors auf ein Substrat
EP1829699A1 (de) * 2006-03-03 2007-09-05 Helmut Szynka Verfahren zum Aufbringen eines Farbdekors auf ein Substrat
EP2636531A1 (de) * 2012-03-06 2013-09-11 Flooring Technologies Ltd. Verfahren zum Bedrucken der Oberfläche eines Werkstücks

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EP3991982A1 (de) 2022-05-04
FR3115493A1 (fr) 2022-04-29
US11840106B2 (en) 2023-12-12
US20220126616A1 (en) 2022-04-28

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