EP2960070B1 - Procédé d'amélioration d'une plaque de bois - Google Patents

Procédé d'amélioration d'une plaque de bois Download PDF

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Publication number
EP2960070B1
EP2960070B1 EP14002166.8A EP14002166A EP2960070B1 EP 2960070 B1 EP2960070 B1 EP 2960070B1 EP 14002166 A EP14002166 A EP 14002166A EP 2960070 B1 EP2960070 B1 EP 2960070B1
Authority
EP
European Patent Office
Prior art keywords
layer
melamine resin
medium
decoration
primer
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
EP14002166.8A
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German (de)
English (en)
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EP2960070A1 (fr
Inventor
Frank Oldorff
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.)
Flooring Technologies Ltd
Original Assignee
Flooring Technologies Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to PL14002166T priority Critical patent/PL2960070T3/pl
Application filed by Flooring Technologies Ltd filed Critical Flooring Technologies Ltd
Priority to ES14002166.8T priority patent/ES2612003T3/es
Priority to EP14002166.8A priority patent/EP2960070B1/fr
Priority to PT140021668T priority patent/PT2960070T/pt
Priority to UAA201610800A priority patent/UA118869C2/uk
Priority to RU2016141976A priority patent/RU2681098C2/ru
Priority to CN201580033833.0A priority patent/CN106457884B/zh
Priority to CA2947789A priority patent/CA2947789C/fr
Priority to US15/302,818 priority patent/US11059071B2/en
Priority to PCT/EP2015/001221 priority patent/WO2015197171A1/fr
Publication of EP2960070A1 publication Critical patent/EP2960070A1/fr
Application granted granted Critical
Publication of EP2960070B1 publication Critical patent/EP2960070B1/fr
Priority to US17/206,818 priority patent/US11745217B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
    • B05D5/06—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain multicolour or other optical effects
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F15/00—Flooring
    • E04F15/18—Separately-laid insulating layers; Other additional insulating measures; Floating floors
    • E04F15/20—Separately-laid insulating layers; Other additional insulating measures; Floating floors for sound insulation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
    • B44C5/00—Processes for producing special ornamental bodies
    • B44C5/04—Ornamental plaques, e.g. decorative panels, decorative veneers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/02—Processes for applying liquids or other fluent materials performed by spraying
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/26—Processes for applying liquids or other fluent materials performed by applying the liquid or other fluent material from an outlet device in contact with, or almost in contact with, the surface
    • B05D1/265—Extrusion coatings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
    • B05D3/0254—After-treatment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/12—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by mechanical means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/06—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to wood
    • B05D7/08—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to wood using synthetic lacquers or varnishes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/50—Multilayers
    • B05D7/56—Three layers or more
    • B05D7/58—No clear coat specified
    • B05D7/584—No clear coat specified at least some layers being let to dry, at least partially, before applying the next layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
    • B44C5/00—Processes for producing special ornamental bodies
    • B44C5/04—Ornamental plaques, e.g. decorative panels, decorative veneers
    • B44C5/0469—Ornamental plaques, e.g. decorative panels, decorative veneers comprising a decorative sheet and a core formed by one or more resin impregnated sheets of paper
    • B44C5/0476—Ornamental plaques, e.g. decorative panels, decorative veneers comprising a decorative sheet and a core formed by one or more resin impregnated sheets of paper with abrasion resistant properties

Definitions

  • the invention relates to a method for finishing a wood-based panel with a top and a bottom.
  • Such a method is for example from the EP 2 338 693 B1 known.
  • Such wood-based panels which are preferably made of MDF or HDF, are widely used and used in many different fields.
  • a particularly large field of application is the use as a floor panel.
  • the decorative layer In particular, in this use, provided with the decor wood-based panels are exposed to immense stress, in particular by walking.
  • the decorative layer In order to withstand these stresses, the decorative layer must be covered with a protective layer.
  • This usually consists of a synthetic resin, for example melamine resin, to which various additives have been added. Due to the various layers applied to the wood-based panel, tensile stresses occur which can cause the panel to warp.
  • a coding Due to the various layers applied to the wood-based panel, tensile stresses occur which can cause the panel to warp.
  • both the top and the bottom of the wood-based panel must be coated to allow these forces to occur evenly on both sides and thus avoid a key.
  • the order of the synthetic resin layer on the wood-based panel can be done in various ways. For example, it is known that synthetic resin granules or powder on the side of the wood-based panel to be coated to apply and to introduce any additives provided. During final compression under the influence of pressure and temperature, the applied powder melts and forms a homogeneous layer. In this method, a double-sided coating of the wood-based panel is of course not possible because the scattered powder is only on the surface of the wood-based panel and is connected only during compression with this.
  • WO 2012/037950 A1 It is known to provide a press-bare carrier plate made of wood fibers or wood shavings on the top of which a primer is applied from a liquid melamine resin, wherein the resin at least partially penetrated into the upper edge layer of the support plate and the area of the resulting in the production of the wood-based panel Press skin at least partially penetrates and tempered. After drying the primer, a primer is applied, and on the dried primer layer, a decor is then printed by means of a water-based paint. Subsequently, a cover layer of at least one enriched with abrasion-resistant particles and cellulose fibers melamine resin is applied to the decor.
  • a primer made of a liquid melamine resin is applied, which penetrates into the lower surface layer of the support plate.
  • a return is applied to the underside of the support plate and the layer structure pressed under the action of pressure and temperature.
  • the wood-based panels produced by this process have a very hard surface. If made of such a wood-based panel floor panels turns when walking on the floor due to the hard surface increased impact sound, resulting in an unpleasant sound sensation. In addition, the surface is relatively brittle due to its hardness, so that micro-cracks can form when heavy objects fall from high to the floor.
  • the invention is based on the object to improve the per se known production technology of melamine resin-based lamination so that laminates with a warmer, softer and less audible sound coating are easy and safe to produce, and the technology can also be easily integrated into existing manufacturing processes.
  • the behavior towards mechanical stress such as impact or abrasion should not worsen, but if possible even improve.
  • Isocyanate groups are highly reactive. They react with the NH group or the methylol group of the melamine resin, resulting in a particularly effective anchoring of the forming layer of the liquid medium on the surface of the melamine resin layer. After the subsequent compression of the layer structure with the wood-based panel, this leads to a coating, which is haptically warmer and softer than a melamine resin layer. If floor panels are subsequently produced from the wood-based panel, this leads to a noise reduction in the case of the laminate floor. Numerous experiments have shown that the behavior against mechanical stress such as impact or abrasion is not deteriorated compared to conventional coatings.
  • liquid melamine resin is also applied to the underside of the carrier plate and dried to a back-pull.
  • a liquid medium can be applied with a proportion of isocyanate groups.
  • the medium may be a dispersion having a solids content of 50 to 60% and the balance being water as solvent, which is dried to a layer after application.
  • water organic solvents or additives are also possible, for example dispersants, release agents, wetting agents or defoamers.
  • the medium may be a molten hotmelt with a 100% solids content (hot melt adhesive), which solidifies upon application to a layer upon cooling. The layer formation can be accelerated by active cooling.
  • Hotmelt is applied either by means of a slot nozzle or a spray application.
  • At least one covering layer consisting of a UV varnish is applied to the dried or solidified medium layer.
  • the covering layer preferably has nanoparticles.
  • wear-resistant Particles in particular corundum particles, either in the liquid medium and / or are sprayed onto the liquid medium, preferably before its layer formation.
  • the melamine resin layer and / or the cover layer may have antistatic and / or antibacterial agents and / or glass beads.
  • the glass spheres can be used as microglass with a diameter of less than 30 ⁇ m for improving the surface properties, in particular in the melamine resin layer and / or as glass spheres with a diameter of 30 to 120 ⁇ m during later compression of the layer structure as a spacer between the layer containing the antiperspirant particles and the press plate serve, whereby the wear on the press plate is reduced.
  • the medium can be applied in several individual layers. Preferably, the medium is applied in an amount of 50 to 200 g / m 2 .
  • a structure can be embossed into the upper side of the last layer, which is preferably formed in particular synchronously with the decor ("synchronous pore").
  • the decor can be a wood, stone or tile decor or even a fantasy decor.
  • the compression of the layer structure is preferably carried out by means of a short-cycle press. If a hotmelt is used as the medium, the pressing is preferably carried out by means of a structured roll (calender roll).
  • the melamine resin may be pure melamine resin. Preferably, however, it is formed as a mixture of melamine resin and urea resin.
  • the single FIGURE shows a wood-based panel 1 made of HDF or MDF with a top O and a bottom U.
  • liquid melamine resin is applied to the primer, which at least partially penetrated into the upper edge layer of the wood-based panel 1.
  • the primer is dried to a primer layer 2.
  • a base color is applied and dried to a base color layer 3.
  • a printing ink is applied to produce a decoration, which is then dried to a decorative layer 4.
  • a liquid melamine resin is applied and dried to a melamine resin layer 5.
  • the melamine resin can contain glass beads 12, in particular with a diameter of up to 30 ⁇ m, which are mixed into the liquid melamine resin.
  • a liquid medium which contains a proportion of isocyanate groups.
  • the liquid medium has a solids content of preferably 50 to 60%, with water as solvent.
  • organic solvents or additives are also possible, for example dispersants, release agents, wetting agents and / or defoamers. Drying of the liquid medium then acts as a layering agent.
  • a hotmelt comprising hot isocyanate groups may also be used.
  • the hotmelt is heated before application and then forms the layer 6 automatically during cooling. The layer formation can be accelerated by active cooling.
  • a hotmelt for example, the company Kleiberit under the name PUR HC 717.5 product used.
  • the isocyanate groups in the hotmelt or in the (dried) dispersion are reactive and react with the methylol group of the melamine resin to form a polyurethane and / or with the NH group to form a urea derivative. Also, the reaction with water to amine and the further reaction with free isocyanate groups to urea derivatives is possible. As a result, anchoring of the dried dispersion or the hot melt on the melamine resin layer 5 is achieved. This is compared to a pure melamine resin softer, yet wear-resistant, haptically warmer and not so noticeable sound layer formed.
  • wear-resistant particles 8 in particular corundum particles can be included, which can be mixed and / or scattered and glass beads 12 having a diameter of 30 to 120 microns, which serve as a spacer between the wear-resistant particles 8 and the press plate during subsequent compression, to reduce the wear on the press plate.
  • a covering layer 7 is applied, which may consist of a UV coating, which preferably contains nanoparticles 11 based on silica to increase the micro-scratch resistance.
  • the cover layer 7 may also contain antistatic and / or antibacterial agents. It is also possible to provide microglass 12 with a diameter of up to 30 ⁇ m for improving the surface properties.
  • the layer structure thus produced is finally - as known - pressed under pressure and temperature influence to form a laminate.
  • a structure corresponding to the decor can be embossed.
  • the pressing of the layer structure is preferably carried out in a short-cycle press. If a hotmelt is used, the layer structure is preferably pressed with a calender roll. The structure is engraved in the short-cycle press in the press plate and the calender roll in the peripheral surface.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Floor Finish (AREA)
  • Laminated Bodies (AREA)
  • Chemical And Physical Treatments For Wood And The Like (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Claims (19)

  1. Procédé pour affiner un panneau (1) en matériau à base de bois, comportant une face supérieure (O) et une face inférieure (U), présentant les étapes suivantes :
    a) on applique un apprêt en une résine de mélamine liquide sur la face supérieure (O), la résine de mélamine étant amenée à pénétrer au moins partiellement dans la couche marginale supérieure du panneau (1) en matériau à base de bois,
    b) on fait sécher l'apprêt pour former une couche d'apprêt (2),
    c) on applique une peinture de fond sur la couche d'apprêt (2),
    d) on fait sécher la peinture de fond pour former une couche de peinture de fond (3),
    e) on applique une encre d'impression sur la couche de peinture de fond (3) pour générer un décor,
    f) on fait sécher le décor pour former une couche de décor (4),
    g) on applique une résine de mélamine liquide sur la couche de décor (4) séchée,
    h) on fait sécher la résine de mélamine pour former une couche de résine de mélamine (5),
    et caractérisé par l'étape suivante :
    i) on applique un fluide liquide présentant une part de groupes isocyanates sur la couche de résine de mélamine (5).
  2. Procédé selon la revendication 1, caractérisé en ce que l'on applique une résine de mélamine liquide sur la face inférieure (U) et on la fait sécher pour former un tirant antagoniste (9).
  3. Procédé selon la revendication 2, caractérisé en ce que l'on applique un fluide liquide présentant une part de groupes isocyanates sur le tirant antagoniste (9).
  4. Procédé selon la revendication 1 ou 3, caractérisé en ce que le fluide est une dispersion présentant 50 à 60 % de solides, le reste étant de l'eau, que l'on fait sécher pour former une couche (6) après l'application.
  5. Procédé selon la revendication 1 ou 3, caractérisé en ce que le fluide est un adhésif thermofusible qui, une fois appliqué, se fige en une couche (6).
  6. Procédé selon la revendication 1, caractérisé en ce que l'on applique au moins une couche de recouvrement (7) sur la couche de fluide séchée.
  7. Procédé selon la revendication 6, caractérisé en ce que la couche de recouvrement (7) comprend des nanoparticules (9) pour améliorer la résistance aux micro-rayures.
  8. Procédé selon l'une des revendications précédentes, caractérisé en ce que le fluide comprend des particules (8) inhibant l'usure, en particulier des particules de corindon.
  9. Procédé selon l'une des revendications précédentes, caractérisé en ce que le fluide, la couche (4) de résine de mélamine et/ou la couche de recouvrement (7) comprennent des moyens à effet antistatique et/ou antibactérien et/ou des billes de verre (12).
  10. Procédé selon la revendication 9, caractérisé en ce que les billes de verre (12) présentent un diamètre inférieur à 30 µm.
  11. Procédé selon la revendication 9, caractérisé en ce que les billes de verre (12) présentent un diamètre de 30 µm à 120 µm.
  12. Procédé selon l'une des revendications précédentes, caractérisé en ce que l'on applique le fluide en plusieurs couches individuelles.
  13. Procédé selon l'une des revendications précédentes, caractérisé en ce que l'on applique le fluide liquide en une quantité de 50 à 200 g/m2.
  14. Procédé selon l'une des revendications précédentes, caractérisé en ce que l'on comprime la structure en couches.
  15. Procédé selon la revendication 14, caractérisé en ce que lors de la compression de la structure en couches, on fait gaufrer une structure dans les couches appliquées sur la face supérieure (O).
  16. Procédé selon la revendication 14 prise en dépendance de la revendication 14 ou selon la revendication 15 lorsque la revendication 14 est prise en dépendance de la revendication 4, caractérisé en ce que la compression s'effectue au moyen d'une presse à cycle court.
  17. Procédé selon la revendication 14 prise en dépendance de la revendication 5 ou selon la revendication 15 lorsque la revendication 14 est prise en dépendance de la revendication 5, caractérisé en ce que la compression s'effectue au moyen d'au moins un rouleau structuré.
  18. Procédé selon l'une des revendications 15 à 17, caractérisé en ce que la structure est réalisée de façon synchrone avec le décor.
  19. Procédé selon l'une des revendications précédentes, caractérisé en ce que le décor est un décor de bois, de pierre, de carrelage ou de fantaisie.
EP14002166.8A 2014-06-24 2014-06-24 Procédé d'amélioration d'une plaque de bois Active EP2960070B1 (fr)

Priority Applications (11)

Application Number Priority Date Filing Date Title
ES14002166.8T ES2612003T3 (es) 2014-06-24 2014-06-24 Procedimiento para realizar el acabado de un panel de compuesto de madera
EP14002166.8A EP2960070B1 (fr) 2014-06-24 2014-06-24 Procédé d'amélioration d'une plaque de bois
PT140021668T PT2960070T (pt) 2014-06-24 2014-06-24 Processo de acabamento de um painel de aglomerado de madeira
PL14002166T PL2960070T3 (pl) 2014-06-24 2014-06-24 Sposób uszlachetniania płyty z tworzywa drzewnego
RU2016141976A RU2681098C2 (ru) 2014-06-24 2015-06-17 Способ отделки плиты на основе древесных материалов
CN201580033833.0A CN106457884B (zh) 2014-06-24 2015-06-17 用于精加工木材板的方法
UAA201610800A UA118869C2 (uk) 2014-06-24 2015-06-17 Спосіб оздоблення плити на основі деревинних матеріалів
CA2947789A CA2947789C (fr) 2014-06-24 2015-06-17 Procede de finition d'un panneau derive du bois
US15/302,818 US11059071B2 (en) 2014-06-24 2015-06-17 Method for finishing a wood-based board
PCT/EP2015/001221 WO2015197171A1 (fr) 2014-06-24 2015-06-17 Procédé de finition d'un panneau dérivé du bois
US17/206,818 US11745217B2 (en) 2014-06-24 2021-03-19 Method for finishing a wood board

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP14002166.8A EP2960070B1 (fr) 2014-06-24 2014-06-24 Procédé d'amélioration d'une plaque de bois

Publications (2)

Publication Number Publication Date
EP2960070A1 EP2960070A1 (fr) 2015-12-30
EP2960070B1 true EP2960070B1 (fr) 2016-11-02

Family

ID=51176028

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14002166.8A Active EP2960070B1 (fr) 2014-06-24 2014-06-24 Procédé d'amélioration d'une plaque de bois

Country Status (10)

Country Link
US (2) US11059071B2 (fr)
EP (1) EP2960070B1 (fr)
CN (1) CN106457884B (fr)
CA (1) CA2947789C (fr)
ES (1) ES2612003T3 (fr)
PL (1) PL2960070T3 (fr)
PT (1) PT2960070T (fr)
RU (1) RU2681098C2 (fr)
UA (1) UA118869C2 (fr)
WO (1) WO2015197171A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2960070B1 (fr) * 2014-06-24 2016-11-02 Flooring Technologies Ltd. Procédé d'amélioration d'une plaque de bois
PL3738787T3 (pl) 2019-05-13 2021-12-20 Flooring Technologies Ltd. Sposób wytwarzania płyty drewnopochodnej wyposażonej w dekor

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CN103118878B (zh) 2010-09-23 2016-01-20 地材科技有限公司 面板的制造方法和根据该方法制造的面板
EP2960070B1 (fr) * 2014-06-24 2016-11-02 Flooring Technologies Ltd. Procédé d'amélioration d'une plaque de bois

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UA118869C2 (uk) 2019-03-25
EP2960070A1 (fr) 2015-12-30
CN106457884B (zh) 2018-05-25
US11745217B2 (en) 2023-09-05
US20210205842A1 (en) 2021-07-08
CA2947789A1 (fr) 2015-12-30
US11059071B2 (en) 2021-07-13
PL2960070T3 (pl) 2017-04-28
RU2016141976A3 (fr) 2019-01-10
WO2015197171A1 (fr) 2015-12-30
US20170095836A1 (en) 2017-04-06
PT2960070T (pt) 2017-01-09
CA2947789C (fr) 2022-06-21
CN106457884A (zh) 2017-02-22
RU2681098C2 (ru) 2019-03-04
RU2016141976A (ru) 2018-07-24
ES2612003T3 (es) 2017-05-11

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