EP3464652B1 - Procédé de fabrication d'un produit laminaire multicouches et système pour sa fabrication - Google Patents

Procédé de fabrication d'un produit laminaire multicouches et système pour sa fabrication Download PDF

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Publication number
EP3464652B1
EP3464652B1 EP17737043.4A EP17737043A EP3464652B1 EP 3464652 B1 EP3464652 B1 EP 3464652B1 EP 17737043 A EP17737043 A EP 17737043A EP 3464652 B1 EP3464652 B1 EP 3464652B1
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EP
European Patent Office
Prior art keywords
covering layer
laminar
embossed surface
laminar element
support
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EP17737043.4A
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German (de)
English (en)
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EP3464652A1 (fr
Inventor
Mariano ROVETTI
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CosTA Srl
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CosTA Srl
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    • C—CHEMISTRY; METALLURGY
    • C14—SKINS; HIDES; PELTS; LEATHER
    • C14B—MECHANICAL TREATMENT OR PROCESSING OF SKINS, HIDES OR LEATHER IN GENERAL; PELT-SHEARING MACHINES; INTESTINE-SPLITTING MACHINES
    • C14B1/00—Manufacture of leather; Machines or devices therefor
    • C14B1/44—Mechanical treatment of leather surfaces
    • C14B1/56—Ornamenting, producing designs, embossing
    • C—CHEMISTRY; METALLURGY
    • C14—SKINS; HIDES; PELTS; LEATHER
    • C14B—MECHANICAL TREATMENT OR PROCESSING OF SKINS, HIDES OR LEATHER IN GENERAL; PELT-SHEARING MACHINES; INTESTINE-SPLITTING MACHINES
    • C14B7/00—Special leathers and their manufacture
    • C14B7/02—Composite leathers
    • C—CHEMISTRY; METALLURGY
    • C14—SKINS; HIDES; PELTS; LEATHER
    • C14C—CHEMICAL TREATMENT OF HIDES, SKINS OR LEATHER, e.g. TANNING, IMPREGNATING, FINISHING; APPARATUS THEREFOR; COMPOSITIONS FOR TANNING
    • C14C11/00—Surface finishing of leather
    • C14C11/003—Surface finishing of leather using macromolecular compounds
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/007—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by mechanical or physical treatments
    • D06N3/0077—Embossing; Pressing of the surface; Tumbling and crumbling; Cracking; Cooling; Heating, e.g. mirror finish
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/12—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins
    • D06N3/14—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins with polyurethanes

Definitions

  • the present invention concerns a method for making a multilayer laminar product, particularly suitable for upgrading leather.
  • the present invention concerns also a system for implementing said method.
  • the so-called "upgrading" processes are employed, which make it possible to increase the commercial value of low-quality leather.
  • one of the first steps of a leather processing cycle consists in separating the outer, more valuable layer, which is referred to as "grain” in technical jargon, from a lower, less valuable layer, which in turn can be divided in further layers.
  • grain in technical jargon
  • the term “leather” means not only leather as a whole, but also and especially any of the layers obtained from it, in particular the less valuable ones.
  • an upgrading process of the known type consists in covering the surface of the hide which is intended to be visible during use with a layer of plastic material, generally polyurethane.
  • a layer of plastic material generally polyurethane.
  • the above mentioned layer makes it possible to cover any defects which may be present on the leather surface and to obtain an appearance similar to that of more valuable leather.
  • the surface of the product is also embossed for the purpose of obtaining special aesthetic effects that contribute to increasing the value of the product.
  • a known technique for upgrading leather includes the step of covering a laminar support, for example a hide to be upgraded, with a layer of polyurethane resin.
  • embossed paper is pressed against the layer of polyurethane resin, which has not been completely polymerized yet and therefore retains a soft consistency, in order to impress the pattern of the embossed paper on said layer.
  • the polyurethane resin is successively polymerized, in such a way as to make it adhere to the laminar support in a stable manner.
  • the embossed paper is removed from the laminar support in order to obtain the final product.
  • the embossed paper is previously covered with a protective film, also in polyurethane, which prevents any direct contact between the polyurethane resin and the embossed paper. This film becomes an integral part of the polyurethane resin during the polymerization process previously described.
  • a first drawback derives from the fact that embossed paper is available on the market in predefined widths which usually do not exceed 1600 mm. Consequently, the technique described above cannot be used for processing hides whose width exceeds 1600 mm.
  • This aspect is a limitation, considering that some hides are much wider than 1600 mm and sometimes their width reaches and even exceeds 3400 mm. In order to be able to use the technique described above with hides that are so wide, it is necessary to cut the latter along their longitudinal direction in such a way as to obtain strips which are narrower than the paper and which are processed one after the other.
  • the known technique described above poses a further drawback, represented by the fact that the embossed paper available on the market is not provided with the protective film, which therefore must be produced in the leather upgrading system.
  • the film is produced by applying a thin layer of polyurethane resin to the paper, for example by spreading it with a blade or a roller, by spraying it with a spray gun, etc. The resin is then solidified in an oven in order to obtain the film.
  • a further drawback posed by the known technique described above is related to the cost of embossed paper, which is increased due to the fact that the pulp and basic weight of the paper must be suited to bear the mechanical, chemical and thermal stress produced during the processing cycle. Obviously, the cost of the embossed paper affects the cost of the processing cycle.
  • a device is provided downstream of the polymerization process, said device being suited to remove the portion of film left on the embossed paper, so that the latter can be reused.
  • this device increases the overall dimensions and the costs of the system, as well as process costs.
  • a further drawback posed by the known technique described above derives from the fact that the embossed paper needs to be periodically replaced, which increases process costs even further.
  • Document US3542617 describes a method for making a multilayer laminar product, comprising essentially the steps of covering a first side of a laminar support with a covering layer made of a non-completely polymerized polymeric resin, preparing a laminar element provided with a first side chemically incompatible with said polymeric resin, pushing an embossed surface (for example embossed paper) against said covering layer after interposing said laminar element in order to impress the pattern of said embossed surface on said covering layer, polymerizing said covering layer in order to obtain a stabilized covering layer, and finally separating said laminar element from said stabilized covering layer.
  • an embossed surface for example embossed paper
  • Document EP1731658 describes a process for producing a leather-like sheet, wherein a skin-like layer composed of a resin composition is formed on top of a fibrous substrate.
  • Document GB1268763 describes a method of finishing leather comprising i) forming a laminate which comprises consecutively leather, a film of a coating composition and a release sheet comprising a support coated with a silicone oil or polytetrafluorethylene, and ii) removing the release sheet.
  • the objects illustrated above are achieved by a method for making a multilayer laminar product, in particular upgraded leather, in accordance with claim 1.
  • the said objects are also achieved by a system for manufacturing said multilayer laminar product, in accordance with claim 6.
  • the technique which is the subject of the invention makes it possible to process very wide hides with no need to cut them.
  • the technique of the invention is particularly suitable for processing valuable hides in large sizes.
  • the method of the invention for making a multilayer laminar product, particularly suitable for upgrading leather includes the preparation of a laminar support, indicated by 16 in Figure 1 .
  • the laminar support 16 is a hide, but the method of the invention can be applied also to other laminar supports, in particular fabrics, be they synthetic or non synthetic.
  • the laminar support 16 is moved forward along a direction of advance X, at a predefined speed of advance, by a first feeding device 2, visible in Figure 2 .
  • said first feeding device 2 comprises a flexible element closed as a ring around a series of rollers, on which the laminar support 16 is rested and which is moved forward according to said direction of advance X.
  • a first side 16a of the laminar support 16 is covered with a covering layer 17 made of a polymeric resin, preferably but not necessarily comprising polyurethane.
  • the covering layer in polymeric resin 17 is deposited on the laminar support 16, preferably by spraying it or spreading it with a blade or a roller on the first side 16a by means of an applicator unit 3.
  • the applicator unit 3 may comprise a series of spraying nozzles arranged in a circle, which are rotated around the axis of the circle in such a way that they intersect, in succession, the trajectory of the laminar support 16, or are moved with an alternative motion and crosswise with respect to the trajectory of the laminar support 16.
  • the applicator unit 3 may comprise a doctor blade for spreading the polymeric resin on the first side 16a.
  • the covering layer 17 obtained in this way is not completely polymerized, that is, is not polymerized or is partially polymerized, so that it has a yielding consistency, for example soft, allowing it to be embossed through the exertion of a pressure sufficiently slight as not to affect the integrity of the underlying laminar support 16.
  • the thickness of the covering layer 17 is included between 7 microns and 30 microns and, even more preferably, it is substantially equal to 12 microns.
  • the covering layer 17 is hardened, for example through a slight polymerization process, in such a way as to give it a more compact consistency, similar to that of a gel, and to obtain a hardened covering layer.
  • the hardening step is performed by heating the covering layer with a heating device 26, for example a bank of infrared lamps or a ventilated dryer heated with diathermic oil, vapour or gas.
  • a heating device 26 for example a bank of infrared lamps or a ventilated dryer heated with diathermic oil, vapour or gas.
  • a laminar element 18, indicated in Figure 1(c) is prepared, which is provided with a first side 18a chemically incompatible with the polymeric resin of the covering layer 17.
  • first side 18a chemically incompatible with the polymeric resin of the covering layer 17.
  • chemically incompatible is used in the present application to mean that said first side 18a, when placed in contact with the polymeric resin, does not create chemical bonds with the latter, that is, does not adhere to it in an irreversible manner, so that the laminar element 18 can be easily separated from the covering layer 17 also after the latter has been polymerized, without damaging the covering layer itself.
  • the laminar element 18 is provided in the shape of a strip 20 and is moved forward in the direction of advance X, at a speed corresponding to said speed of advance, by a second feeding device 7, visible in particular in the detailed view of Figure 3 .
  • the second feeding device 7 comprises a series of rollers and a spreading element that maintain the laminar element 18 tensioned and guide it according to a predefined trajectory, in such a way as to bring it in contact with the laminar support 16.
  • the laminar element 18 is guided by the second feeding device 7 in such a way that it is arranged between the covering layer 17 and the embossed surface 6, with its first side 18a facing towards the covering layer 17.
  • the pattern of the embossed surface 6 is impressed on the covering layer 17.
  • said pushing action is performed by exerting a pressure included between 20 atm and 120 atm, even more preferably included between 40 atm and 70 atm.
  • said pressure is sufficiently limited as not to alter the properties of the laminar support 16 substantially, in particular its softness, which is very important in the case where the laminar support is made of leather.
  • the embossed surface 6 belongs to an embossing roller 14, mounted in such a way that it revolves around its own axis.
  • said embossing roller 14 can be kept constantly resting on the laminar element 18 and on the laminar support 16, thus allowing a continuous process to be carried out.
  • the embossed surface 6 may belong to a device different from said embossing roller, for example a tape, a die or a similar device.
  • the embossing roller 14 is made of steel and its surface is chromium-plated, which gives it high chemical resistance.
  • the supporting surface which, during the pushing action, supports the laminar support 16 on the side opposite the first side 16a.
  • the supporting surface belongs to a corresponding supporting roller 15, mounted in such a way that it revolves around its own axis.
  • the embossing roller 14 and the supporting roller 15 are arranged at a mutual distance which is shorter than the overall thickness of the laminar support 16, the covering layer 17 and the laminar element 18, in such a way that said elements are compressed following their passage through the two rollers 14, 15.
  • an adjusting device is provided, which is suited to modify said distance according to the thickness of the laminar support 16 used and to the pressure required for the pushing action.
  • the system 1 comprises a plurality of interchangeable embossed surfaces 6, featuring different surface patterns.
  • a plurality of embossing rollers 14, each one having a respective embossed surface 6, are mounted on a revolving device 27 in such a way that they can be easily and quickly exchanged when necessary. It is evident that in variant embodiments the number of embossing rollers can be different from that shown in Figure 5 .
  • the laminar element 18 this must be sufficiently yielding to allow the pattern to be transferred from the embossed surface 6 to the covering layer 17.
  • the feature just mentioned above can be obtained by selecting a material that is resistant enough to allow the thickness of the laminar element 18 to be very limited, while at the same time having mechanical and thermal resistance compatible with the use required for said process.
  • nylon, polyesther and other equivalent materials are particularly suited to be used to make the laminar element 18, these material having a relatively low cost and appropriate mechanical and thermal resistance even with very limited thicknesses, for example included between 0.05 mm (50 microns) and 0.1 mm (100 microns). It is also evident that, in variant embodiments of the invention, the laminar element 18 can be made of any other material, provided that it has the properties described above.
  • a treatment unit 4 causes the polymerization of the covering layer 17, in such a way as to obtain a stabilized covering layer 19, that is, a substantially solidified covering layer.
  • polymerization takes place through heating, still preferably at a temperature included between 60 °C and 190 °C.
  • the temperature values just indicated above are sufficiently low not to alter considerably the structure of the laminar supports 16 commonly used in the process, in particular hides, which therefore preserve their softness.
  • said heating step starts when the covering layer comes into contact with the embossed surface 6, which is associated with a heating device that can comprise, for example, a hollow space in contact with the embossed surface 6 and a circulation device that conveys a heat carrier fluid into the hollow space.
  • a heating device that can comprise, for example, a hollow space in contact with the embossed surface 6 and a circulation device that conveys a heat carrier fluid into the hollow space.
  • the polymerization process is completed in a polymerization oven 25 arranged downstream of the pushing unit 5 according to the direction of advance X, as shown in Figure 2 .
  • the laminar element 18 is separated from the stabilized covering layer 19 as shown in Figure 1(f) , so as to obtain the multilayer laminar product 22.
  • a recovery unit 11 arranged downstream of the treatment unit 4 according to the direction of advance X, which comprises, preferably and as shown in Figure 4 , two winding rollers 12, 13, one per each strip 20, around which the respective portions of laminar element 18 removed from the laminar support 16 are wound.
  • the embossed surface 6 is distinct from the laminar element 18, which therefore is not subjected to the width restrictions typical of the embossed paper available on the market.
  • a laminar element 18 with a smooth surface.
  • a smooth laminar element 18 can be selected among a wide range of materials available on the market, including smooth nylon. This makes it also possible to select the laminar element 18 in such a way as to minimize costs and/or maximize the quality of the multilayer product 22.
  • the possibility to use a smooth, or substantially smooth, laminar element 18, makes it possible to obtain it by placing side by side two or more identical strips 20 overlapping at the level of their respective edges, in such a way as to multiply the obtainable operating width.
  • the reduced thickness of the laminar element 18 is such that the overlapping area of the two laminar elements does not generate visible effects on the final product. Therefore, it can be understood that the method of the invention achieves the object of allowing laminar supports in any width to be processed.
  • the possibility to use a low cost material for the laminar element 18 brings about the further advantage of making the elimination of the laminar element 18 after use economically advantageous, since there is no need to recover it for a successive use. This makes it possible to size the laminar element 18 so that it needs to resist just one processing step and therefore makes it possible to minimize its thickness, thus further limiting its cost and increasing processing quality.
  • the laminar element 18 belongs to a strip 20 which comprises also a film 21, indicated for example in Figure 1(c) , made with a substance which is chemically compatible with the polymeric resin, meaning suited to adhere to the latter in a stable manner.
  • the film 21 is coupled with the first side 18a of the laminar element 18, in such a way that it can be detached from it without damaging the laminar element itself.
  • the film 21 is maintained in contact with the covering layer 17 while the embossed surface 6 is being pushed and the covering layer itself is being polymerized.
  • each one of said elements belongs to a respective strip 20 and the corresponding films 21 are all kept in contact with the covering layer 17 during said pushing action.
  • the removal of the film 21 from the laminar element 18 can be guaranteed by respectively selecting for the laminar element 18 and for the film 21 two materials which are chemically incompatible with each other, such as, for example, nylon and a polyurethane resin.
  • the first side of the laminar element 18 can be properly treated in such a way as to prevent the film 21 from spontaneously coming off the laminar element 18.
  • a laminar element 18 made of nylon the result just described above can be achieved, for example, by subjecting the first side 18a to a corona treatment.
  • the strip 20 may comprise further layers in addition to said film 21, which are suited to create special aesthetic effects on the final product. For example, there may be a coloured layer, a layer with spots, or different types of layers.
  • each strip 20 belongs to a respective reel 8, 9 which is unwound as the strip 20 is used in the process.
  • Said reels 8, 9 can be mounted on a fixed support, as in the case illustrated in Figure 3 , or on a movable support, for example a revolving support, as in the variant embodiment illustrated in Figure 5 . It is evident that in further variant embodiments the number of reels can be different from that shown in the above mentioned figures.
  • an aligning unit 10 preferably comprising a series of rollers, provides for guiding the strips in such a way as to overlap their respective side edges and thus define the laminar element 18.
  • the laminar support 16 is laid on the flexible element of the first feeding device 2 at the level of a loading area 23 indicated in Figure 2 .
  • the first feeding device 2 then moves the laminar support 16 forward according to the direction of advance X , and at a predefined speed of advance, towards the applicator unit 3, where it is covered with the covering layer 17.
  • the laminar support 16 covered as described above is heated by the heating device 26 in order to harden the covering layer 17.
  • the strips 20 are unwound from the respective reels 8, 9 at the speed of advance and are conveyed by the aligning unit 10 between the embossing roller 14 and the supporting roller 15, wherein the film 21 is brought into contact with the non-completely polymerized covering layer 17 while the embossed surface 6 impresses the pattern on the latter.
  • the contact angle between the laminar support 16 and the embossing roller 14 can vary according to the diameter of the embossing roller, to the production speed, to the thickness of the support to be applied and to the quantity of resin applied, in such a way as to harden the embossed surface of the covering layer 17.
  • the contact with the surface of the embossing roller 14 makes it possible to exploit also this surface, properly heated, in order to start the polymerization of the covering layer 17.
  • the contact angle between the laminar support 16 and the embossing roller 14 can be adjusted according to the needs, by means of an apposite adjusting device which, for example, acts modifying the position of the supporting roller 15 according to the direction of advance X.
  • the variation of the above mentioned contact angle leads to the variation of the contact time between the laminar support 16 and the embossing roller 14.
  • said adjustment is carried out by means of a secondary roller 28 which is arranged immediately downstream of the supporting roller 15 and whose position with respect to the latter can be adjusted.
  • a conveyor belt 29 is wound around the supporting roller 15 and the secondary roller 28 and the laminar support 16 transits said conveyor belt.
  • the polymerization process is completed in the polymerization oven 25 which is arranged downstream of the pushing unit 5.
  • the film 21 associated with the laminar element 18 adheres to the covering layer 17, giving origin to a stabilized layer 19 formed by a single body, indicated in Figure 1(f) .
  • the winding rollers 12, 13 visible in the Figures 2 and 4 recover the laminar element 18, detaching it from the covering layer 17 and from the portion of film 21 which adhered to it. Therefore, based on the description provided above, it can be understood that the method and the system described above achieve all of the set objects.

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  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Textile Engineering (AREA)
  • General Chemical & Material Sciences (AREA)
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Claims (10)

  1. Méthode pour la réalisation d'un produit laminaire multicouche (22), comprenant les opérations suivantes:
    - prédisposition d'un support laminaire (16);
    - couverture d'une première face (16a) dudit support laminaire (16) avec une couche de couverture (17) constitué d'une résine polymérique non complètement polymérisée;
    - prédisposition d'un élément laminaire (18) pourvu d'une première face (18a) chimiquement incompatible avec ladite résine polymérique;
    - poussée d'une surface gaufrée (6) contre ladite couche de couverture (17) après avoir interposé ledit élément laminaire (18) de manière à imprimer le motif de ladite surface gaufrée (6) sur ladite couche de couverture (17), l'élément laminaire (18) étant disposé de manière à ce que ladite première face (18a) soit tournée vers ladite couche de couverture (17);
    - après l'impression dudit motif, polymérisation de ladite couche de couverture (17) afin d'obtenir une couche de couverture stabilisée (19);
    - séparation dudit élément laminaire (18) de ladite couche de couverture stabilisée (19);
    caractérisée en ce qu'elle comprend les opérations supplémentaires suivantes:
    - obtenir ledit élément laminaire (18) en disposant deux ou plusieurs bandes identiques (20) l'une à côté de l'autre se superposant à niveau de leurs bords correspondants, chacune desdites bandes (20) comprenant une pellicule (21) réalisée en une substance qui est chimiquement compatible avec ladite résine polymérique, accouplée à ladite première face (18a) dudit élément laminaire (18) de manière à ce qu'elle puisse être détachée de ladite première face (18a);
    - maintenir les pellicules correspondantes (21) desdits deux ou plusieurs bandes (20) en contact avec ladite couche de couverture (17) alors que ladite surface gaufrée (6) est poussée contre ladite couche de couverture (17) et durant la polymérisation de ladite couche de couverture (17).
  2. Méthode selon la revendication 1, caractérisée en ce que chaque bande (20) présente la forme d'une bobine (8, 9).
  3. Méthode selon l'une quelconque des revendications précédentes, caractérisée en ce que ladite surface gaufrée (6) appartient à un rouleau de gaufrage (14).
  4. Méthode selon l'une quelconque des revendications précédentes, caractérisée en ce qu'elle comprend une opération destinée à durcir ladite couche de couverture (17) avant de pousser ladite surface gaufrée (6) contre ladite couche de couverture (17).
  5. Méthode selon l'une quelconque des revendications précédentes, caractérisée en ce que ledit support laminaire (16) comprend une peau et/ou un morceau de tissu.
  6. Système (1) pour la réalisation d'un produit laminaire multicouche (22), comprenant:
    - un premier dispositif d'alimentation (2) indiqué pour faire avancer un support laminaire (16) selon une direction d'avance (X) à une vitesse d'avance prédéfinie;
    - un groupe applicateur (3) apte à couvrir une première face (16a) dudit support laminaire (16) avec une couche de couverture (17) constituée d'une résine polymérique non complètement polymérisée;
    - un deuxième dispositif d'alimentation (7) indiqué pour faire avancer un élément laminaire (18) à une vitesse correspondant à ladite vitesse d'avance;
    - un groupe de traitement (4) disposé en aval dudit groupe applicateur (3) selon ladite direction d'avance (X), configuré pour causer la polymérisation de ladite couche de couverture (17) dudit support laminaire (16);
    - un groupe de poussée (5) comprenant une surface gaufrée (6) disposée en aval dudit groupe applicateur (3) et en amont dudit groupe de traitement (4) selon ladite direction d'avance (X), configuré pour pousser ladite surface gaufrée (6) contre ladite couche de couverture (17) de manière à imprimer le motif de ladite surface gaufrée (6) sur ladite couche de couverture (17), ledit deuxième dispositif d'alimentation (7) étant configuré pour guider ledit élément laminaire (18) de manière à le disposer entre ladite couche de couverture (17) et ladite surface gaufrée (6);
    caractérisé en ce que ledit deuxième dispositif d'alimentation (7) comprend deux ou plusieurs bobines (8, 9) de chacune desquelles une bande (20) est déroulée, étant présent un groupe d'alignement (10) qui est apte à superposer lesdites bandes (20) à niveau des bords latéraux correspondants, de manière à définir ledit élément laminaire (18).
  7. Système (1) selon la revendication 6, caractérisé en ce qu'il comprend un groupe de récupération (11) disposé en aval dudit groupe de traitement (4) selon ladite direction d'avance (X), configuré pour enlever ledit élément laminaire (18) dudit support laminaire (16).
  8. Système (1) selon la revendication 7, caractérisé en ce que ledit groupe de récupération (11) comprend un rouleau d'enroulement (12, 13) autour duquel est enroulé ledit élément laminaire (18) récupéré après son enlèvement dudit support laminaire (16).
  9. Système (1) selon l'une quelconque des revendications de 6 à 8, caractérisé en ce que ladite surface gaufrée (6) appartient à un rouleau de gaufrage (14).
  10. Système (1) selon la revendication 9, caractérisé en ce que ledit groupe de traitement (4) comprend un dispositif de chauffage associé de manière opérationnelle audit rouleau de gaufrage (14).
EP17737043.4A 2016-05-25 2017-05-23 Procédé de fabrication d'un produit laminaire multicouches et système pour sa fabrication Active EP3464652B1 (fr)

Applications Claiming Priority (2)

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ITUA2016A003773A ITUA20163773A1 (it) 2016-05-25 2016-05-25 Metodo di produzione di un prodotto laminare multistrato ed impianto per attuare tale metodo
PCT/IB2017/053028 WO2017203425A1 (fr) 2016-05-25 2017-05-23 Procédé de fabrication d'un produit stratifié multicouche et système associé

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EP3464652B1 true EP3464652B1 (fr) 2020-04-01

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EP3899055B1 (fr) 2018-12-19 2024-07-31 Agfa Nv Procédé d'authentification de cuir naturel gaufré
NL2022904B1 (en) 2019-04-09 2020-10-20 Stahl Int B V Method for upgrading and embossing leather
EP4029611B1 (fr) * 2021-01-18 2024-07-17 GE.MA.TA. S.p.A. Machine pour le traitement d'une bande de papier d'une substance chimique à appliquer sur un cuir
IT202100029126A1 (it) * 2021-11-17 2023-05-17 Cos T A S R L Metodo di produzione di un prodotto laminare multistrato ed impianto per attuare tale metodo
IT202200010658A1 (it) * 2022-05-23 2023-11-23 Gruppo Mastrotto S P A Metodo per il trattamento superficiale di rivestimenti flessibili per uso automotive e aeronautico

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US3542617A (en) * 1967-06-08 1970-11-24 Fiber Industries Inc Method for producing a leather-like material
GB1268763A (en) * 1968-03-12 1972-03-29 Lankro Chemicals Group Ltd For Improvements in or relating to methods of finishing leather
KR101053168B1 (ko) * 2004-02-26 2011-08-01 디아이씨 가부시끼가이샤 피혁형 시트의 제조 방법
ITVI20050081A1 (it) * 2005-03-23 2006-09-24 Cos T A Srl Metodo per la rifinizione di una pelle o un elemento laminare e relativo impianto
ES2686900T3 (es) * 2014-01-23 2018-10-22 Giacomino Adolfo Agosti Método para fabricar un producto del tipo que comprende un elemento de soporte laminar y una capa de mejora y sistema correspondiente

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EP3464652A1 (fr) 2019-04-10
WO2017203425A1 (fr) 2017-11-30

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