EP4370590A1 - Revêtement de surface et procédé de production - Google Patents

Revêtement de surface et procédé de production

Info

Publication number
EP4370590A1
EP4370590A1 EP23720538.0A EP23720538A EP4370590A1 EP 4370590 A1 EP4370590 A1 EP 4370590A1 EP 23720538 A EP23720538 A EP 23720538A EP 4370590 A1 EP4370590 A1 EP 4370590A1
Authority
EP
European Patent Office
Prior art keywords
film
surface coating
layer
lacquer layer
adhesion promoter
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.)
Pending
Application number
EP23720538.0A
Other languages
German (de)
English (en)
Inventor
Lars NIEHUS
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.)
Larmar GmbH
Original Assignee
Larmar GmbH
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
Application filed by Larmar GmbH filed Critical Larmar GmbH
Publication of EP4370590A1 publication Critical patent/EP4370590A1/fr
Pending legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
    • C08J7/04—Coating
    • C08J7/042—Coating with two or more layers, where at least one layer of a composition contains a polymer binder
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2333/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers
    • C08J2333/04—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers esters
    • C08J2333/06—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers esters of esters containing only carbon, hydrogen, and oxygen, the oxygen atom being present only as part of the carboxyl radical
    • C08J2333/08—Homopolymers or copolymers of acrylic acid esters

Definitions

  • the invention relates to a surface coating for application to a base material with a film, with a lacquer layer applied to one side of the film and with an adhesion promoter.
  • the invention further relates to a method for producing the surface coating and a laminate containing the surface coating
  • a surface coating is known for application to a base material, for example chipboard, MDF boards or melamine-coated boards, which comprises a carrier layer and a plastic film made of PET, between which a paper layer is arranged.
  • the plastic film can be provided with a layer of lacquer on one or both sides. If the lacquer layer is on a later surface of a laminate that is away from the paper layer and is formed from the surface coating and the base material, then there is a risk that during application the surface coating on the base material by means of, for example, lamination, the surface is stressed and damaged.
  • a surface coating is known for application to a base material or base layer (wood-based panels or the like), which comprises a plastic film, on one side of which there is a metal layer and an adhesion promoter and on the other side a decorative layer and a Lacquer layer is arranged.
  • the lacquer layer forms a surface of the surface coating, since the adhesion promoter enables a later connection of the surface coating to the base material by pressing or gluing.
  • the disadvantage of the known surface coating is that during further processing of the surface coating it is unprotected and precautions must therefore be taken so that the lacquer layer is not damaged during the production process of a laminate consisting of the surface coating and the base material
  • a surface coating and a manufacturing process are known in which a film provided with a first lacquer layer and a second lacquer layer is subjected to an excimer treatment and then hardened in order to obtain a micro-folded surface structure.
  • a carrier film formed in this way is provided with a further lacquer layer and an adhesive layer, with the structured surface of the first lacquer layer being transferred to the further lacquer layer during a joint pressing process with a substrate.
  • the film with the structure-transferring first and second lacquer layers is removed from the substrate.
  • the first and second lacquer layers have channels that form during folding during the excimer process. When pressing the laminate in a short-cycle press (KT press), the channels can be used for ventilation.
  • KT press short-cycle press
  • the disadvantage of the known surface coating is that it is relatively complex to produce.
  • the object of the present invention is therefore to provide a surface coating for application to a base material and a method for producing the surface coating or a laminate consisting of the surface coating and the base material, that the manufacturing effort is reduced and that in particular a surface of Surface coating is protected during a manufacturing process of a laminate containing the surface coating.
  • the invention in conjunction with the preamble of patent claim 1 is characterized in that the adhesion promoter is connected to the paint layer on a side facing away from the film and that the film is designed as a removable surface film.
  • the particular advantage of the invention is that a later surface of a finished product (laminate) is protected by a removable surface film throughout the entire manufacturing process. This film is only removed when the finished product is created, i.e. after the surface coating has been combined with a base material to form a laminate (finished product). The film is then removed from the surface coating after the laminating process has been completed to produce the finished product. Only then is a lacquer layer of the surface coating exposed and forms a surface of the finished product or laminate.
  • the removable surface film is designed as a structural film, so that the surface coating thereby undergoes structuring.
  • the structure can have reflective structures and/or microstructures, so that the structuring is transferred to the adjacent layer, preferably the lacquer layer can be.
  • the finished product then has a structured surface lacquer layer.
  • the surface film therefore has a dual function. On the one hand, it serves as a protective layer for the surface coating during the manufacturing process of the laminate. On the other hand, it serves as a means of structuring the surface of the laminate.
  • the adhesive force between the lacquer layer and the adhesion promoter is significantly greater than the adhesive force between the lacquer layer and the film.
  • the structuring is permanently contained in the lacquer layer, so that the structuring of the lacquer layer is retained regardless of the duration of adhesion of the film to this lacquer layer.
  • This film can therefore advantageously serve as a surface film or protective film until the finished laminate product is delivered to a customer. The additional application of a protective film can thus be avoided.
  • the adhesion promoter is laminated in its dry state with a wet applied lacquer layer of the surface film, with the lacquer layer hardening taking place after lamination. This can advantageously ensure that the adhesion between the adhesion agent and the paint layer is significantly greater than the adhesion between the surface film and the paint layer, so that the surface film can later be easily removed from the paint layer.
  • the lacquer layer is structured using a tool before it is applied to the film. After When the lacquer layer is applied to the flat side of the film, the applied lacquer layer is hardened using UV light or electron beams. This results in the required adhesion between the lacquer layer and the film.
  • the film or the protective film has a venting lacquer layer on a side facing away from the adhesion promoter, which serves as the surface of the surface coating.
  • This ventilation lacquer layer has a large number of micro-elevations that are dome-shaped, prism-shaped or cuboid. Channels are formed between these micro-elevations which serve to remove air deposits that arise when the laminate is pressed. A surface roughness formed in this way is created by processing the paint, preferably using a roller tool. A transfer of the structuring to another layer is not planned. Either the ventilation lacquer layer already has the intended structuring or it is transferred to the lacquer layer by means of the film, which is used as a structural film.
  • the ventilation lacquer layer can also have several different structures, with one structuring already in the venting varnish layer is contained when it is bonded to the film, and wherein the other structuring is contained in the film and is transferred to the venting varnish layer by lamination and curing.
  • the micro-elevations are designed to have the same shape, so that the micro-elevations and the channels between them have a regular structure. This advantageously allows the air retention to be directed specifically to the edge.
  • the invention has the features of method claim 6.
  • the particular advantage of the method according to the invention is that after the surface coating has been produced, a film (surface film) is designed to be removable and/or removable, so that after the film has been removed, the surface of the surface coating is formed by the lacquer layer.
  • the ability to easily remove the film from the surface is achieved by laminating the paint layer with the adhesion promoter when wet.
  • the adhesion promoter is applied as a polymer dispersion adhesive layer to a transfer film and, in the dry state, is laminated together with the lacquer layer applied wet to the film and the film to form a composite film.
  • the transfer film is separated from the composite film so that the surface coating thus formed can be further used for pressing with a base material.
  • the transfer film serves as a carrier for an adhesive layer and is removed from the composite film as soon as the other layers are firmly connected to one another with the composite film.
  • the adhesive layer of the transfer film transfers to the hardened lacquer layer and preferably forms a thin skin layer that does not splinter and does not leave any residue.
  • a robust and strong layer connection of the laminate can be created in the next manufacturing step by lamination
  • the lacquer layer is therefore hardened once and in one production step, in which the lacquer layer is connected to the film and the adhesive layer and preferably to the transfer film.
  • the hardening has the effect that the adhesion forces between the lacquer layer and the adhesive layer are greater than between them the adhesive layer and the transfer film.
  • a roller used for lamination has a detachable surface layer, so that after the adhesion promoter has been applied to this surface layer and subsequent lamination with the lacquered surface film and, if necessary, hardening of the lacquer layer, the finished laminated surface coating is released again from the lamination roller can be.
  • no transfer film is required, which serves as a temporary carrier for the adhesion promoter and, if necessary, other decorative layers
  • the method according to the invention has the features of claim 11.
  • the surface coating can advantageously be provided as an intermediate product and can be connected to a base material to form a finished product in a location-independent manner. Only after completion of the manufacturing process or as a final step of the manufacturing process is the surface film removed from the coated finished product, so that the surface is now formed not by the surface film but by the lacquer layer. In this way, the lacquer layer is protected and free from stress during the manufacturing process.
  • FIG. 1 shows a cross section through a surface coating according to a first embodiment
  • 2 A schematic representation of a production of the surface coating according to FIG. 1,
  • FIG. 1 A schematic representation of an alternative production of the surface coating according to FIG. 1,
  • FIG. 5 shows a cross section through the laminate after laminating the surface coating onto the base material, so that a surface film of the surface coating is removed in a final manufacturing step
  • FIG. 6 shows a cross section through a surface coating according to a second embodiment of the invention.
  • FIG. 7 shows a schematic representation of a production of the surface coating according to the second embodiment according to FIG. 6,
  • FIG. 8 shows a cross section through a surface coating according to a further embodiment
  • FIG. 10 is a schematic top view with a regular microstructure on the lacquer layer.
  • a surface coating 1 according to Figure 1 essentially consists of a film 2, a lacquer layer 3 and an adhesion promoter (primer) 4.
  • the film 2 can be designed as a polymer film or plastic film or as a paper film. It serves as a carrier film for the lacquer layer 3 and the adhesion promoter 4.
  • the film 2 can be designed as a structural film that can have microstructures and/or reflective structures.
  • the film 2 can be matt or have a degree of gloss.
  • the structuring of the film 2 can be done by embossing using heat or by curing a polymer lacquer.
  • the structuring of the film 2 is arranged on a side facing the lacquer layer 3.
  • a side of the film 2 facing away from the lacquer layer 3 forms a top side 5 of the surface coating 1.
  • the film 2 is designed as a surface film of the surface coating 1.
  • the top side 5 can be uncoated or coated in the same way as the side of the film 2 facing the lacquer layer 3. In this case, the film 2 is coated on both sides. If necessary, the top side 5 of the film 2 can have an antistatic property.
  • the lacquer layer 3 forms a polymer coating with a density in the range between 2 g/m 2 and 120 g/m 2
  • the adhesion promoter 4 is a polymer coating with a density in the range of 0.5 g/m 2 to 80 g/m 2 .
  • the adhesion promoter 4 is preferably designed as a polymer dispersion adhesive layer
  • the production of the surface coating 1 according to a first embodiment of the invention is shown in FIG and the counter roller 8 is passed through, the lacquer layer 3 being applied to one side by means of the application roller 7.
  • the lacquer layer 3 is applied in the wet state to the structural film 2, in the wet state the structural film 2 and the lacquer layer 3 applied to the same are then fed to a laminating plant 10, for example via a deflection roller 9.
  • the laminating unit 10 has a take-up roller 11 and a counter-pressure roller 12, through which the film 2 provided with the lacquer layer 3 and a transfer film 13 provided with the adhesion promoter 4 are fed.
  • the transfer film 13 can be designed as a polymer film or as a paper film. It has the adhesion promoter 4 on a side facing away from the pick-up roller 11. The adhesion promoter 4 is in a dry state on the transfer film 13 or is fed to the laminating unit 10 in the dry state.
  • the lacquer layer 3 is arranged in a feed area 15 of the laminating unit 10 on a side of the film 2 facing the take-up roller 11. In this way, in the laminating unit 10, the lacquer layer 3 is directly connected to the adhesion promoter 4 applied to the transfer film 13.
  • a hardening unit 14 is arranged downstream of the laminating unit 10, in which the lacquer layer 3 is hardened, for example using UV light. As an alternative to UV curing, electron beam curing can also be carried out.
  • the hardening unit 14 is located in an area between the junction (feed area 15) of the pick-up roller 11, in which the film 2 provided with the lacquer layer 3 and the film 2 provided with the adhesion promoter 4 Transfer film 13 of the take-up roller 7 are brought together and a take-off area 16 of the take-up roller 11 at which the surface coating 1 consisting of the film 2, the lacquer layer 3 and the adhesion promoter 4 is separated from the transfer film 13. Between the feed area 15 and the take-off area 16, the pick-up roller 11 rotates into an obtuse angular range, for example in a range of 150° to 190°.
  • the surface coating 1, which consists of several layers or layers, is now completed. It can, for example, serve as a decorative layer or layer for a base material 17.
  • the surface coating 1 is laminated onto wood-based panels (for example MDF panels, HPF panels or pressboard, etc.) as the base material
  • the laminating of the surface coating 1 with the base material 17 can, for example, take place at another location.
  • the surface coating 1 serves as an intermediate product for producing a laminate
  • the laminate 18 which consists of the surface coating 1 reduced by the surface film 2 and the base material 17.
  • the laminate 18 can be used, for example, on a piece of furniture or as floor covering.
  • the surface coating 1 is laminated with the base material 17 using heat and pressure.
  • the base material 17 can, for example, as can be seen from Figures 4 and 5, have a wood material carrier 19 and a melamine decorative layer 20, the melamine decorative layer 20 being arranged on a side of the wood material carrier 19 facing the surface coating 1.
  • the surface film 2 is removed or peeled off from the assembled layers, so that the laminate 18 is produced.
  • the finished laminate 18 (Finished product) has the lacquer layer 3 on a free top side.
  • the film 2 served to protect the lacquer layer 3.
  • the lacquer layer 3 serves as a structural lacquer layer, which, after lamination and curing, has the structuring together with the film 2 and the adhesive layer 4.
  • the adhesion promoter 4 is not fed to the laminating unit 10 on a transfer film, but directly against a take-up roller 11 '.
  • an adhesion promoter application unit 21 is arranged, by means of which the adhesion promoter 4 is applied to the take-up roller 11'.
  • a drying unit 22 is arranged downstream of the adhesion promoter application unit 21, by means of which the adhesion promoter 4 is dried. Downstream, the adhesion promoter 4 is adhered to the pick-up roller 11 'and fed to the laminating unit 10, in which it is connected to the film 2 having the lacquer layer 3.
  • the surface coating 1 formed in this way is transported further to the take-off area 16, whereby - as in the production according to FIG. 2 - the lacquer layer 3 is hardened by means of the hardening unit 14.
  • the surface coating 1 is detached from the pick-up roller 11'.
  • the pick-up roller 11' is designed in such a way that layers or the adhesion promoter 4 can be removed from the surface of the pick-up roller 11'.
  • the pick-up roller 11' is a so-called release roller.
  • a transfer film 13 can be dispensed with in this production.
  • a surface coating T can be provided which is on one of the
  • the side of the adhesion promoter 4 facing away from the paint layer 3 has at least one decorative layer 23.
  • the decorative layer 23 can, for example, have a glitter layer 23' and/or a color decorative layer 23'' and/or a metal layer 23'''. The number and design of the decorative layer 23 depends on the application.
  • the decorative layer 23, 23' is provided with a further adhesion promoter (primer) 4'.
  • This adhesion promoter 4' then serves for the adhesive connection when laminating with the base material 17 to form a laminate, not shown, which differs from the laminate 18 in that the surface coating T additionally has at least one decorative layer in comparison to the surface coating 1 23 and the further adhesion promoter 4 '.
  • the decorative layers 23 ', 23'', 23''' and the additional adhesion promoter 4' are arranged between the transfer film 13 and the adhesion promoter 4.
  • the additional adhesion promoter 4 ' is attached directly to the transfer film 13, while the adhesion promoter 4 is arranged on a side facing the film 2 provided with the lacquer layer 3 and ensures that the at least one decorative layer is connected to the lacquer layer 3.
  • the lacquer layer 3 is protected by the adhesion of the film 2 to the lacquer layer 3 during the manufacturing process of the surface coating and lamination to the laminate. There can be no defects or bubbles that can arise from process steps as a result of heat and pressure treatment.
  • the surface coating 1, 1' can be used to produce the laminate using different pressing and laminating processes, for example (KT, HPL/CPL, extrusion/calender/cast process/artificial leather).
  • the base material 18 can be, for example
  • the base material can, for example, have a thermoplastic layer made of PE or PP or PS or ABS or PET or PVC or PMMA.
  • the base material can have, for example, a plastisol layer or a PU layer or a PUR layer or a PVC layer.
  • the decorative layers 23, 23 ', 23''. 23'' are dried and/or hardened before laminating. So you are in a dry state.
  • the lacquer layer 3 is preferably designed as a UV lacquer layer based on acrylates.
  • the lacquer layer can also be formed by an ESH lacquer or a thermal lacquer.
  • the films or layers described are preferably provided as roll goods.
  • the lacquer layer can have a thickness in a range between 2 ⁇ m and 150 ⁇ m.
  • the base material 17 consists of one or more layers or layers.
  • a surface coating 1'' in contrast to the surface coating 1 according to the first embodiment, additionally has a ventilation lacquer layer 24 on, which is applied to a side of the film 2 opposite the paint layer 3 designed as a structural paint layer.
  • This ventilation paint layer 24 enables targeted ventilation when pressing the laminate 18 in, for example, the KT press.
  • the ventilation lacquer layer 24 is separated from the laminate 18 together with the film 2 as a surface protection film when the laminate 18 is delivered to the customer as a finished product after the entire manufacturing process has been completed.
  • the ventilation paint layer 24 has a microstructuring with a large number of micro elevations 25, the extent of which in the extension plane of the ventilation paint layer 24 is in a ⁇ m range. A height of the micro elevations 25 from a base surface can also be in a ⁇ m -area.
  • the micro-elevations 25 can be randomly distributed over a base area of the ventilation lacquer layer 24.
  • the micro-elevations 25 are preferably not the same shape: they therefore have a different shape.
  • Channels 26 are formed between the micro-elevations 25 and run open to the edges 27 of the ventilation lacquer layer 24.
  • the venting lacquer layer 24 is applied to the film 2 in such a way that the side of the venting lacquer layer 24 provided with the micro elevations 25 faces the film 2
  • the number of micro-elevations 25 is so large that there is a maximum contact area with the film 2.
  • the surface area of the micro-elevations 25 is in a range between 70% and 90% of a total area of the ventilation paint layer 24. In this way it is ensured that the microstructuring of the ventilation paint layer 24 when pressed with the other layers to the laminate 18 is not visible on the lacquer layer 3.
  • prism-shaped micro-elevations 28 can be arranged regularly distributed over the surface of a ventilation lacquer layer 24 '. In this way, regular ventilation channels 29 are formed to remove the air.
  • the micro elevations 28 are designed to have the same shape.
  • the micro elevations 25, 28 can be dome-shaped, cylindrical, prism-shaped and/or pyramid-shaped.
  • the structuring of the film 2 is created using a tool and subsequent curing using UV light or electron beams.
  • the tool can have a profiled roller with profile areas or profile surfaces.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Laminated Bodies (AREA)

Abstract

L'invention concerne un revêtement de surface conçu pour être appliqué sur un matériau de base, comprenant un film, une couche de vernis appliquée sur un côté du film et un promoteur d'adhésion, le promoteur d'adhésion étant relié à la couche de vernis sur une face de celle-ci opposée au film, ledit film se présentant en outre sous la forme d'un film de surface pelable.
EP23720538.0A 2022-04-14 2023-04-05 Revêtement de surface et procédé de production Pending EP4370590A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102022109230 2022-04-14
PCT/EP2023/058956 WO2023198551A1 (fr) 2022-04-14 2023-04-05 Revêtement de surface et procédé de production

Publications (1)

Publication Number Publication Date
EP4370590A1 true EP4370590A1 (fr) 2024-05-22

Family

ID=86282553

Family Applications (1)

Application Number Title Priority Date Filing Date
EP23720538.0A Pending EP4370590A1 (fr) 2022-04-14 2023-04-05 Revêtement de surface et procédé de production

Country Status (2)

Country Link
EP (1) EP4370590A1 (fr)
WO (1) WO2023198551A1 (fr)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19954403A1 (de) * 1999-11-12 2001-05-17 Wolff Walsrode Ag Ein- und mehrschichtige, biologisch abbaubare, thermoplastische Folien mit verbesserten Barriereeigenschaften sowie deren Verwendung als Verpackungsfolie oder in Kosmetik- und Hygieneartikeln
EP2979894A1 (fr) 2014-08-01 2016-02-03 Hueck Folien Ges.m.b.H Feuille décorative
DE202017100147U1 (de) * 2017-01-12 2017-02-13 Isolution Dämmstofftechnik GmbH Dämmelement
DE102018010197A1 (de) * 2018-12-18 2020-06-18 GRID INVENT gGmbH Elektronisches Element und elektrisch angesteuertes Anzeigeelement
EP3800047A1 (fr) 2019-10-01 2021-04-07 SURTECO GmbH Stratifié en tant que surface de meuble de protection à effet métallique décoratif
US20230322013A1 (en) 2020-09-21 2023-10-12 Upco Gmbh Carrier foil, transfer foil, laminate and methods of producing them

Also Published As

Publication number Publication date
WO2023198551A1 (fr) 2023-10-19

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