EP4357146A1 - Baguette de bord - Google Patents

Baguette de bord Download PDF

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Publication number
EP4357146A1
EP4357146A1 EP23204840.5A EP23204840A EP4357146A1 EP 4357146 A1 EP4357146 A1 EP 4357146A1 EP 23204840 A EP23204840 A EP 23204840A EP 4357146 A1 EP4357146 A1 EP 4357146A1
Authority
EP
European Patent Office
Prior art keywords
film
base body
layer
color
composite material
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
EP23204840.5A
Other languages
German (de)
English (en)
Inventor
Tim KRONER
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.)
Printec GmbH
Original Assignee
Printec 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 Printec GmbH filed Critical Printec GmbH
Publication of EP4357146A1 publication Critical patent/EP4357146A1/fr
Pending legal-status Critical Current

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Classifications

    • 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
    • B41M5/50—Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording
    • B41M5/502—Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording characterised by structural details, e.g. multilayer materials
    • B41M5/508—Supports
    • 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
    • B41M5/50—Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording
    • B41M5/502—Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording characterised by structural details, e.g. multilayer materials
    • 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
    • B41M5/50—Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording
    • B41M5/52—Macromolecular coatings
    • 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

Definitions

  • the invention relates to a film having a main layer, a first and optionally a second functional layer.
  • the main layer has between 1 wt.% and 50 wt.%, preferably between 10 wt.% and 30 wt.%, particularly preferably between 20 wt.% and 30 wt.% of at least one filler, wherein the filler is selected from the group comprising TiO 2 and mixtures of TiO 2 and one or more components selected from calcium carbonate, chalk, silica, talc and mixtures thereof and/or the main layer has a colored layer.
  • the colored layer has between 1 wt.% and 50 wt.%, preferably between 10 wt.% and 40 wt.%, particularly preferably between 20 wt.% and 40 wt.% of at least one filler, wherein the filler is selected from the group comprising TiO 2 calcium carbonate, chalk, talc, silica and mixtures thereof.
  • the invention provides a composite material which comprises the film according to the invention and a base body.
  • a method for producing the composite material and a production line are provided.
  • Digital printing enables the production of a print image with a particularly high quality through a higher resolution and also allows a wider range of applications with a high level of flexibility.
  • CMYK Digital printing today is carried out almost exclusively using the CMYK color system.
  • the CMYK color model is a subtractive color model, where the abbreviation CMYK stands for the three color components cyan, magenta, yellow and the black component key as the color depth.
  • This color system can be used to depict a color space (gamut) that meets many requirements from a wide variety of areas.
  • edge strips are produced by the substrate onto which a digital print is applied, such as a furniture panel or the base body of an edge band, often shows through and thus influences the visual impression of the digital print. This is particularly important the darker the substrate is on which the print is made.
  • conventional primers are applied to optically brighten the substrate before printing. These primers are also known as background printing. Primers used include, for example, emulsion paint, emulsion varnish, solvent-based paint, solvent-based varnish, UV-curable paint or UV-curable varnish.
  • a primer decorative prints with white or very light elements that are to be printed on a very dark base body still represent a major technical challenge.
  • White or very light colors appear slightly grayish with conventional printing processes when printed on a black or very dark base body, because the inherent color of the base body is not sufficiently eliminated. However, the greyish appearance is perceived as disturbing by a customer, which is why there is a need to remedy this disadvantage using state-of-the-art technology.
  • the aim is to bond a base body to a film in a durable manner.
  • the film can be in the range of 20 ⁇ m to 900 ⁇ m.
  • the problem arises that the base body shines through as a background and unintentionally influences the optical appearance of the print.
  • the film is connected to a substrate, for example a profile strip.
  • a substrate for example a profile strip.
  • edge strips can be produced for the furniture industry.
  • the edge strips are then attached to the narrow sides of furniture panels to create a tactile and optically pleasing finish.
  • the transition from the edge strip to the furniture panel is designed with a safety radius. This adapts the profile of the edge strip to the furniture panel and ensures that no sharp edges are created at the transition. This inevitably creates a cut edge on the top and bottom of the edge strip and in the corner areas (edge to edge), which means that the color of the base body and also the film become visible.
  • the narrow side of the film is clearly visible in the area of the safety radius and visually forms a frame around the edge strip if the color of the film differs from the decor of the furniture panel. This effect is perceived as disturbing by the customer and should therefore be avoided.
  • the cut edge of the safety radius also makes the base body of the edge strip appear more visually prominent. It is therefore essential to select a base body whose color is color-coordinated with the decor of the furniture panel. If the color of the base body stands out too much from the decor, the base body will also create a frame around the decor, which the customer finds annoying (frame effect). The middle color of the furniture panel's decor is therefore usually selected as the color for the base body in order to avoid this frame effect. Depending on the decor, base bodies with very dark colors must therefore be used, which makes high-quality prints of light colors much more difficult for the reasons already described.
  • the color of the base bodies is determined, for example, by the addition of liquid colors or masterbatches.
  • their coloring can also vary from batch to batch, which in turn affects the coloring of the base body.
  • Another challenge is to use recycled materials, e.g. recycled thermoplastics, as a base body for the production of edge bands for the furniture industry, for example. It would also be desirable to be able to use materials with minor quality defects as a base body for the production of composite materials, among other things. This would be an economic advantage in the production of composite materials, as such base bodies are cheaper to purchase. On the other hand, the amount of waste could be significantly reduced. However, these base bodies are subject to such large optical color variations that, for the reasons already mentioned, no color can be produced using conventional printing techniques. consistent printing results can be achieved. These products therefore do not meet the customer's requirements in terms of visual appearance.
  • recycled materials e.g. recycled thermoplastics
  • the technical problem underlying the invention was therefore to provide an edge strip for furniture panels which overcomes the disadvantages of the prior art.
  • a film which has a filler in the main layer which increases the opacity of the film to such an extent that color fluctuations of a base body to which the film is applied are almost compensated.
  • the invention relates to a film that has a main layer, a first functional layer and optionally a second functional layer. All layers are arranged flat on top of one another, so that the film according to the invention has a layered structure.
  • the first functional layer of the film is arranged on a first side of the main layer and optionally the second functional layer of the film is arranged on a second side of the main layer.
  • the main layer, first and second functional layers thus form a sandwich-like structure, with the main layer being arranged between the first and second functional layers.
  • the film according to the invention has a main layer, a first functional layer and a second functional layer.
  • the main layer comprises between 1% by weight and 50% by weight, preferably between 10% by weight and 30% by weight, particularly preferably between 20% by weight and 30% by weight of at least one filler.
  • the percentage by weight refers to the total mass of the main layer.
  • the filler is selected from the group comprising TiO 2 , calcium carbonate, chalk, talc, silica and mixtures thereof.
  • the filler is selected from the group comprising TiO 2 and mixtures of TiO 2 and one or more components selected from calcium carbonate, chalk, silica, talc and mixtures thereof.
  • the filler described is contained in the main layer itself.
  • the main layer has a colored layer in which the filler is contained.
  • the colored layer has between 1 wt.% and 50 wt.%, preferably between 10 wt.% and 40 wt.%, particularly preferably between 20 wt.% and 40 wt.% of at least one filler, wherein the filler is selected from the group comprising TiO 2 calcium carbonate, chalk, talc, silica and mixtures thereof.
  • the filler described is contained in the main layer and the main layer additionally has a colored layer in which the filler described is also contained.
  • the filler is a white pigment.
  • White pigments are achromatic inorganic pigments with a high refractive index that are used, among other things, to produce optical whiteness.
  • the present invention is particularly environmentally friendly because no compounds containing toxic heavy metals are used as white pigments.
  • Titanium dioxide is particularly preferably used as a filler in the present invention, since titanium dioxide has the highest refractive index and thus the highest opacity among the known white pigments.
  • calcium carbonate is used as a filler. This has the advantage that, unlike powdered titanium dioxide, it is not classified as carcinogenic.
  • the main layer has a color layer, this is preferably arranged on the first side of the main layer.
  • the color layer can be applied, for example, by printing, spraying, inkjetting or rolling. In a preferred embodiment, the color layer is printed on.
  • the filler gives the film a white color with a high opacity compared to a substrate on which the film according to the invention is located.
  • the film according to the invention preferably has an opacity of 65% or higher, preferably 70% or higher, particularly preferably 75% or higher.
  • Opacity is therefore a measure of the opacity of materials and layers; this is typically measured by the ratio of the reflectance of an individual sheet of film on a black background to the reflectance of the same sheet on a white background.
  • an aluminum Dibond plate with RAL 9005 can serve as the black background and an aluminum Dibond plate with RAL 9003 can serve as the white background.
  • the measurement can be carried out using a spectrophotometer, whereby in digital printing the CIE-LAB color model ( ⁇ ECIELAB) is usually used to measure color and to determine the color difference to the reference value.
  • ⁇ ECIELAB CIE-LAB color model
  • the filler is preferably evenly distributed in the main layer, so that the color impression and thus also the opacity of the film are approximately the same at every point.
  • the desired opacity can be advantageously adjusted by choosing the embodiments described above (main layer comprising a filler as described herein or comprising a color layer with filler as described herein or the combination of these two embodiments).
  • the film according to the invention can have any degree of gloss.
  • the main layer of the film further comprises a material selected from the group comprising polyethylene terephthalate (PET), acrylonitrile butadiene styrene (ABS), polypropylene (PP), polyvinyl chloride (PVC), polycarbonate (PC), polystyrene (PS), low-density polyethylene (PE-LD), thermoplastic polyurethane (TPU) or high-density polyethylene (PE-HD) and mixtures thereof.
  • PET polyethylene terephthalate
  • ABS acrylonitrile butadiene styrene
  • PP polypropylene
  • PVC polyvinyl chloride
  • PC polycarbonate
  • PS polystyrene
  • PE-LD low-density polyethylene
  • TPU thermoplastic polyurethane
  • PE-HD high-density polyethylene
  • the main layer of the film further comprises polar and/or reactive molecular groups which are introduced, for example, by copolymerization and/or grafting of a polymer.
  • the polar and/or reactive molecular groups are, for example, selected from the group comprising carboxylic acids or their esters, epoxides, isocyanates, phenol-formaldehyde resin, silanes, titanates, alcohols, amides, imides, ammonium compounds or sulfonic acids or their esters or salts, salts in particular acrylic acid, Acrylic acid esters, methacrylic acid, methacrylic acid esters, methyl methacrylic acid esters or mixtures thereof.
  • the main layer preferably comprises polypropylene, and particularly preferably biaxially oriented polypropylene (BOPP).
  • BOPP biaxially oriented polypropylene
  • the term is biaxial because the molecular chains are stretched in two directions (biaxial).
  • the main layer and thus the film prove to be particularly robust against mechanical influences in this embodiment.
  • the main layer comprises an unstretched polypropylene in the form of so-called cast polypropylene (CPP).
  • CPP cast polypropylene
  • the main layer of the film can also comprise at least one additive.
  • a UV absorber can serve as an additive to improve the light resistance of the film.
  • UV absorbers are, for example, organic UV absorbers such as benzophenones, benzotriazoles, oxalanilides, phenyltriazines, or inorganic UV absorbers such as iron oxide pigments, zinc oxide or HALS (hindered amine light stabilizers), such as 2,2,6,6-tetramethylpiperidine derivatives such as bis(2,2,6,6-tetramethyl-4-piperidyl) sebacate.
  • organic UV absorbers such as benzophenones, benzotriazoles, oxalanilides, phenyltriazines
  • inorganic UV absorbers such as iron oxide pigments, zinc oxide or HALS (hindered amine light stabilizers), such as 2,2,6,6-tetramethylpiperidine derivatives such as bis(2,2,6,6-tetramethyl-4-piperidyl) sebacate.
  • HALS hinderedered amine light stabilizers
  • the film according to the invention has a thickness between 10 ⁇ m and 50 ⁇ m, preferably between 15 ⁇ m and 30 ⁇ m, particularly preferably between 20 ⁇ m and 25 ⁇ m.
  • the thickness of the first and second functional layers is between 2 ⁇ m and 4 ⁇ m, preferably between 2 ⁇ m and 3 ⁇ m.
  • the first and second functional layers each have a thickness of 2 ⁇ m.
  • the first functional layer has a primer.
  • the primer serves as an adhesion promoter between the film to be printed and the printing ink used in digital printing.
  • the primer makes the surface of the film more wettable, which increases the adhesive strength of the colors in digital printing.
  • the primer thus serves to improve the surface properties of the film for subsequent digital printing.
  • Solvent-based, UV-based and water-based primers can be used as primers.
  • the primer is preferably clear or transparent and is selected from a dispersion varnish, a solvent-based varnish or particularly preferably a UV-curable Varnish.
  • a UV-curable varnish is particularly preferred as it has particularly good curing properties.
  • the first functional layer consists of a primer.
  • At least one side of the main layer of the film according to the invention is corona-treated, plasma-activated or flame-treated.
  • the corona treatment, plasma activation or flame-treatment is carried out on the main layer before the first functional layer and/or the second functional layer are applied.
  • the corona treatment is an electrochemical process for the surface modification of plastics. All of the surface treatments mentioned significantly increase the wettability of the main layer for primers and/or adhesion promoters and/or adhesives.
  • a print is applied to the first functional layer of the film.
  • All conceivable decorations such as stone, natural stone, metal look, concrete or wood decorations or similar, can be applied to the film as a print.
  • the film is preferably printed using a digital printing process.
  • Digital printing processes were initially used primarily in the graphics industry, such as advertising agencies, advertising material manufacturers or printing companies, but it has now become apparent that digital printing processes are also more frequently found in other industries. There are many reasons for this, but two main arguments can be identified. Digital printing enables the production of a print image with a particularly high quality through a higher resolution and also allows a wider range of applications with high flexibility. In addition, the print can be reproduced in a consistent quality.
  • the print decoration is particularly preferably applied using the CMYK color system.
  • the CMYK color model is a subtractive color model, where the abbreviation CMYK stands for the three color components cyan, magenta, yellow and the black component key as the color depth. This color system can be used to depict a color space (gamut) that meets many requirements from a wide variety of areas.
  • the print decoration can also be applied using four, five, six or more color components for digital printing.
  • the print decoration has one or more special colors as a color component in the print. Any special color can be used, for example special red or special yellow.
  • the special color(s) is/are selected in particular depending on a desired print decoration.
  • the film has no print.
  • the film according to the invention particularly preferably has a second functional layer if the main layer comprises a filler, in particular if the filler is or contains TiO 2 .
  • the second functional layer comprises or consists of at least one copolymer of polypropylene or at least one homopolypropylene or a combination of these.
  • the functional layer comprises or consists of at least one copolymer of propylene or a combination of two or more copolymers of the copolymer. This embodiment of the second functional layer enables the film to adhere to a base body during welding in accordance with the present invention.
  • the second functional layer has at least one primer and one sealing varnish. This is particularly advantageous if the film is glued or sealed to a base body during further processing.
  • Suitable primers are selected from the group comprising dispersion varnishes, solvent-based primers, UV-curable primers and aqueous primers.
  • the film according to the invention does not have a second functional layer, adhesion of the film to a base body is achieved by the main layer of the film.
  • the invention relates to a base body which has the film according to the invention on one surface, as described herein.
  • the base body can preferably be a flat, plate-shaped base body or a strip-shaped base body.
  • the film and base body are bonded together in a material-locking manner.
  • the material-locking connection is also referred to below as laminating the film onto the base body, so that a laminated base body is created.
  • the lamination and thus the material-locking connection are preferably carried out by welding, sealing or gluing.
  • the base body is plate-shaped.
  • a plate-shaped base body can be produced, for example, by an extruder with a width of up to 1300 mm in a continuous process. This process is known to those skilled in the art.
  • large-area films can be applied to the plate-shaped base body.
  • the films can be printed before being applied to the base body or after being applied to the base body. Edge strips in the desired format can then be cut out of the composite materials produced in this way.
  • the base body is a strip-shaped base body.
  • This preferably has the dimensions of an edge strip and is laminated according to the method according to the invention with a film made to the dimensions of the strip-shaped base body.
  • This embodiment is known to the person skilled in the art under the term single-strand extrusion. In this embodiment too, it is possible to print the film before applying it to the strip-shaped base body or after applying it to the strip-shaped base body.
  • the invention therefore provides an edge strip which has a base body and a film laminated thereon.
  • the base body contains a thermoplastic polymer, preferably selected from polyethylene terephthalate (PET), acrylonitrile butadiene styrene (ABS), polypropylene (PP), polyvinyl chloride (PVC), polyethylene (PE), polystyrene (PS), thermoplastic polyurethane (TPU) or polymethyl methacrylate (PMMA) and the like.
  • a thermoplastic polymer preferably selected from polyethylene terephthalate (PET), acrylonitrile butadiene styrene (ABS), polypropylene (PP), polyvinyl chloride (PVC), polyethylene (PE), polystyrene (PS), thermoplastic polyurethane (TPU) or polymethyl methacrylate (PMMA) and the like.
  • PET polyethylene terephthalate
  • ABS acrylonitrile butadiene styrene
  • PP polypropylene
  • PVC polyvinyl chloride
  • PE polyethylene
  • PS poly
  • the base body can only contain one of the materials mentioned (polyethylene terephthalate (PET), acrylonitrile butadiene styrene (ABS), polypropylene (PP), Polyvinyl chloride (PVC), polyethylene (PE), polystyrene (PS), thermoplastic polyurethane (TPU) or polymethyl methacrylate (PMMA)).
  • PET polyethylene terephthalate
  • ABS acrylonitrile butadiene styrene
  • PP polypropylene
  • PVC Polyvinyl chloride
  • PE polyethylene
  • PS polystyrene
  • TPU thermoplastic polyurethane
  • PMMA polymethyl methacrylate
  • the base body can also contain a mixture of two or more of these materials.
  • the base body can consist of one of the materials mentioned or of a mixture of two or more of these materials.
  • the film according to the invention consists of the same material or a similar material or a combination of materials from similar material groups as the upper layer of the base body, i.e. the layer to which the film is applied.
  • This has the advantage that when laminating by welding, for example in a calender, a particularly durable welding of the film to the base body is achieved.
  • materials from the group of acrylonitrile butadiene styrene (ABS), polyvinyl chloride (PVC), polycarbonate (PC), polystyrene (PS), thermoplastic polyurethane (TPU) and mixtures thereof can be combined well with one another.
  • a base body with an upper layer made of ABS can be combined very well with a printed film made of ABS, PS, PMMA, TPU, PC, PVC or mixtures thereof in the process according to the invention.
  • Another group of materials that can be combined with one another are polypropylene (PP), low-density polyethylene (PE-LD), high-density polyethylene (PE-HD) and mixtures thereof.
  • PP polypropylene
  • PE-LD low-density polyethylene
  • PE-HD high-density polyethylene
  • a base body with an upper layer made of PP can be combined very well with a film made of PP or PE or mixtures thereof in the process according to the invention.
  • a base body with an upper layer selected from the materials of one of the groups mentioned is welded together with a film made of a material selected from the same group as the upper layer of the base body.
  • the film does not consist of the same or a similar material or a combination of materials from similar material groups as the upper layer of the base body, i.e. the layer to which the film is applied.
  • the film is preferably connected to the base body by sealing or gluing.
  • the base body can consist of one layer or comprise several layers, such as a structural layer and a melt layer or adhesive layer, and possibly further layers, whereby the melt layer or adhesive layer serves to connect the composite material, in particular in the form of an edge strip, to a plate-shaped workpiece. If a melt layer or adhesive layer is used, the The base body preferably also has a layer of an aqueous or solvent-based primer. According to the invention, the melt layer or adhesive layer is arranged on the side of the base body that is opposite the side on which the film is applied.
  • the invention relates to an edge strip for the furniture or construction industry, in particular for the narrow surface coating of plate-shaped workpieces, such as furniture panels, worktops or similar material panels.
  • the edge strip according to the invention has a base body made of at least one base material, preferably of at least one thermoplastic, as a carrier material.
  • Such edge strips or cover strips are also simply referred to as edges or edge bands or also as edge banding. They are preferably used to coat the narrow surfaces or end faces of material panels or plate-shaped workpieces, such as furniture panels or worktops (e.g. kitchen worktops).
  • Such material panels are designed, for example, as wood panels or wood-based panels (e.g. chipboard, fiberboard or the like) or also as composite panels or as lightweight panels.
  • the edge strips are attached to the respective material panel in a conventional manner, for example, using hot melt adhesives.
  • the edge strips can also be provided with a melt layer or functional layer during production, which is then melted during processing using suitable sources (e.g. laser radiation, hot air, plasma or the like).
  • suitable sources e.g. laser radiation, hot air, plasma or the like.
  • the base body of the edge strip can also already be made of a material that enables processing using laser radiation, hot air, plasma or the like.
  • a further embodiment relates to an edge strip according to one of the aforementioned embodiments, wherein a liquid coating is applied to a melt layer of the base body, which contains energy-absorbing additives and is dried or cross-linked thermally and/or chemically.
  • the liquid coating can be applied to the melt layer over the entire surface or only to partial areas or regions. This allows targeted, spatially defined areas of the melt layer to be melted with the energy source during processing, so that the bond between the edge strip and the furniture panel can also be defined with precise positioning.
  • the melt layer of the base body can be mixed with additives with functional groups or polar groups, such as maleic anhydride or based on isocyanate.
  • additives which do not contain any polar groups are added to the melt layer of the base body.
  • the base body is laminated with the film according to the invention, which has a correspondingly high filler content and accordingly a high opacity.
  • the film according to the invention By applying the film according to the invention to the base body, brightness and/or color fluctuations of the base body are advantageously compensated.
  • An influence of the color of the base body on the optical appearance of a print on the film, in particular on the brightness of a print on the film, can thus advantageously be essentially avoided. It is irrelevant whether the film is printed before or after it is applied to the base body.
  • the composite material according to the invention is designed such that only tolerable deviations in brightness occur between the printed decorations of the composite material of at least a first batch and each subsequent batch.
  • deviations in brightness in combination with color deviations between the printed decorations of the composite material of the at least one first batch and each subsequent batch are tolerable if differences in brightness are not perceived by humans as different or are only very slight.
  • the composite material according to the invention is therefore designed such that there are no deviations in brightness between the printed decorations of the at least one first batch and each subsequent batch.
  • the edge strip is typically attached to the narrow sides of furniture panels.
  • the visible surfaces of the furniture panels generally have the same design or decoration as the edge strips. It is therefore also important that the deviations in brightness between the printed decorations on the visible surfaces of the furniture panels and the printed decorations on the edge strip are minimal, so that they are not perceived as different by humans or are only perceived as very slight.
  • the combination of furniture panel and edge strip must produce a harmonious visual image. According to the invention, an edge strip is provided that meets these requirements.
  • Color deviations can be determined using the equality method, for example.
  • the test sample is compared with a series of known standard samples using a technical device or visually with the eye until the equality is definitely established.
  • the selected primary colors can also be offered in proportion.
  • Technical implementations are the color wheel or the Maxwell approach. In the first case, the temporal resolution of the measuring device or the eye is exceeded by a rapid change; in the second case, a spatial distribution of the primary colors is brought to an apparently common area by blurring and thus perceived by the eye as a uniform color impression. This method usually uses the equality judgment of the normal-sighted eye.
  • the range of perceptible colors is covered by the so-called L*a*b* color space.
  • the L*a*b* color space is described by a three-dimensional coordinate system.
  • the L* axis describes the brightness (luminance) of the color with values from 0 (black) to 100 (white).
  • the a* axis describes the green or red component of a color, with negative values representing green and positive values representing red.
  • the b* axis describes the blue or yellow component of a color, with negative values representing blue and positive values representing yellow.
  • the scales of the a* axis and the b* axis cover a number range from -150 to +100 and -100 to +150.
  • the composite material according to the invention with the film according to the invention has, regardless of the color of the base body, values for a* and/or b* in a range between -10 and +20.
  • values for a* and/or b* are in a range between -5 and +15.
  • the L*a*b* values for comparable base bodies without the film according to the invention are in the following ranges: L* 13 to 90 a* - 0.75 to 50 b* - 30 to 40.
  • the difference (also referred to as spread) from the lightest to the darkest region for the composite material according to the invention with the film according to the invention for the L* value is in the range from 7 to 12, preferably in the range from 8 to 11, particularly preferably in the range from 9 to 10.
  • the spread for the composite material according to the invention with the film according to the invention for the a* value is in the range from 7 to 13, preferably in the range from 8 to 12, particularly preferably in the range from 9 to 10.
  • the spread for the composite material according to the invention with the film according to the invention for the b* value is in the range from 10 to 22, preferably in the range from 12 to 20, particularly preferably in the range from 14 to 18.
  • the spread for comparable base bodies without the inventive film is in the following ranges: L* 70 to 80 a* 60 to 70 b* 90 to 110
  • the spread of the color differences can be reduced and the brightness of the composite material can be increased significantly, even with base bodies of a very dark color or black color, because the film according to the invention has a high opacity, i.e. it is highly opaque.
  • a significant reduction in the spread was also achieved in the deviations of the individual color locations.
  • the brightness of the printing substrate could be increased by an average of 84% by applying a film according to the invention to a base body, thus creating an almost neutral basis for various decorative base body colors. This effect is most clearly evident with a blue background.
  • the brightness could be increased from 13.54 (very dark) to 84.44 (very light) (see examples).
  • the film according to the invention creates a substrate for a decorative print that has a high brightness. This is particularly advantageous if the printed decoration has the same brightness or a lower brightness than the film according to the invention. In this case, all colors of the printed decoration can be reproduced in the decorative print without being influenced by the color tone of the base body or the film according to the invention.
  • the present invention can therefore also be used to apply very demanding decorations such as black marble to a base body in a very high quality.
  • a base body that is black in color is provided with a film according to the invention.
  • the marble decoration is or will be printed on the film in black with white accents.
  • the white parts of the decoration appear particularly clear and bright.
  • the reproduction of a decoration with such a high contrast on a black base body could not be implemented in a satisfactory quality.
  • the printed white parts always appear slightly grayish, the reproduction of a bright and clear white tone was not possible.
  • the present invention eliminates this disadvantage.
  • the printing base By applying the film according to the invention, the printing base always has a white color, which means that light colors can be reproduced true to color.
  • the film according to the invention is suitable for concealing impurities, specks and other contaminants in the material of the base body. Due to the composition of the film, it is robust enough to compensate for even the most noticeable deviations in the thickness of the base body. Films according to the invention that contain BOPP are particularly suitable for this purpose.
  • the base body can therefore also contain recycled materials or materials of inferior quality thanks to the present invention, since both color deviations as well as impurities, specks and other contaminants can be compensated.
  • the film according to the invention has a thickness of between 10 ⁇ m and 50 ⁇ m, the formation of a frame effect when attaching the composite material in the form of an edge strip to a plate-shaped workpiece such as a furniture panel is advantageously avoided.
  • the film according to the invention is so thin that it is not visually noticeable in the surrounding safety radius.
  • the present invention therefore provides edge strips that are visually of particularly high quality and thus meet the requirements of a wide range of customers. In particular, the thinner the film according to the invention, the better the frame effect is avoided.
  • the film according to the invention and the base body of the composite material are preferably bonded to one another.
  • the term "material bond” refers to bonds in which the bonding partners are held together by atomic or molecular forces. Such a bond is essentially an indissoluble bond, i.e. it can only be broken by destroying the bonding partners.
  • the material bond between the film and the base body can be achieved by lamination.
  • the lamination can be carried out by welding, sealing or gluing.
  • the film can be printed before the material bond. Printing is preferably carried out using a digital printer.
  • the film can be applied unprinted to the base body and then printed. In this way, a composite material can be produced that has a decoration on one surface.
  • the composite material can additionally have a structure on the surface provided with the decoration.
  • the structure on the composite material and the decoration shown particularly preferably convey a harmonious optical and tactile impression, which can also be designed as a synchronous pore.
  • a lacquer layer is applied to the film for finishing.
  • This lacquer layer preferably has a gloss level between 1 GE and 100 GE (measured with a reflectometer according to DIN 67530 and ISO 2813 at a measuring angle of 60°).
  • the gloss level of the paint layer can advantageously be adapted to the customer's wishes. This means that composite materials with very matt surfaces, i.e. with a low gloss level, as well as composite materials with glossy surfaces, i.e. with a very high gloss level, can be provided. In addition, composite materials can also be provided with a combination of paints with different gloss levels, which results in a medium gloss level.
  • the varnish for the lacquer layer is preferably selected from water-based varnishes, solvent-based varnishes, UV-curable varnishes, resin-based varnishes, acrylic varnishes or polyurethane varnishes (PUR).
  • the invention therefore provides a composite material or an edge strip which comprises a lacquer layer on the side of the base body provided with a film.
  • the film is welded to a plate-shaped base body and then edge strips of the desired width are cut out of the laminated plate-shaped base body. It is conceivable that the cut-out edge strips are then provided with a layer of varnish.
  • This layer of varnish preferably has a gloss level of between 1 GE and 100 GE (measured with a reflectometer according to DIN 67530 and ISO 2813 at a measuring angle of 60°) as already described.
  • the invention relates to a plate-shaped workpiece with a composite material according to the invention, which is designed as an edge strip.
  • Suitable plate-shaped workpieces are, for example, furniture panels, such as in particular fronts, worktops, bodies, shelves and cheek systems of pieces of furniture.
  • the laminated edge strip is attached in the conventional manner as described above.
  • the material-locking connection of the strip-shaped base body or the plate-shaped base body with the film according to the invention leaves the technical properties of the base body unchanged.
  • the edge strips produced or cut out of the composite material according to the invention are therefore characterized by the desired technical properties of an edge strip, which are achieved by the
  • the edge strips according to the invention can therefore advantageously be integrated into existing downstream production steps without having to make complex or expensive adjustments to the production facilities.
  • thermoplastic edge materials can be disadvantageous due to the relatively high restoring forces of the edge. If an edge strip is attached to the narrow sides of furniture panels whose corner areas end with a radius, cracks often form in the material of the base body if the radii of the curves are tight. Conventional edges show a strong tearing behavior in these areas, which is particularly evident when a decoration has been printed directly onto a top layer of the base material. The cracking is then perceptible both visually and haptically. The material or the color of the material of the base body then becomes visible at the break points. With a base body of white color, this effect is also referred to as white brittleness.
  • the edge strip according to the invention is advantageous over conventional edges because the bond between the base body and the film according to the invention reduces the tearing behavior of the edge strip at tight radii.
  • the film according to the invention itself does not show any tearing behavior at tight radii. Even if the base body shows cracks, these break points in the base body are visually concealed by the high opacity of the film according to the invention. Since the film according to the invention itself does not show any tearing behavior, cracks in the base body at tight radii are also concealed haptically.
  • the present invention therefore makes it possible to provide furniture parts with tighter radii with the edge strip according to the invention than was previously possible. This makes it possible to open up new customer markets.
  • the radius here refers to the outer radius of an edge strip running around a rounded corner of a furniture panel.
  • R40 radius of 40 mm
  • R50 50 mm
  • the described stress whitening occurs on these edges.
  • radii of 25 mm (R25) and even 15 mm (R15) can be formed without having to accept any visual impairment.
  • All the base bodies already described are suitable for carrying out the method according to the invention. Due to the opacity of the film according to the invention, it advantageously covers brightness and color variations of the base body. Priming the base body is therefore no longer necessary and in particular multi-layer primers can be saved. This leads to enormous economic savings in the amount of primer used.
  • the method saves time because no drying times have to be taken into account when applying multiple primer layers. The production speed can thus be significantly increased. Furthermore, the length of the production system can be shortened by the method according to the invention. In conventional methods, each printing layer and thus also each primer layer is applied by a separate printing unit, for example an anilox roller. If primer layers are saved, printing units in the production system can also be saved accordingly, which shortens the length of the system. This frees up space for other production processes and also reduces the maintenance effort of the production system.
  • the surface of a base body does not need to be prepared by corona treatment, plasma activation or flame treatment for the application of a primer.
  • the lamination of the base body and film is achieved by the material-locking connections already described.
  • the film according to the invention is printed.
  • the film can be printed before being applied to a base body or after being applied to a base body.
  • the film is printed in both embodiments using a digital printing process. Due to the high opacity of the film, a CMYK color model can advantageously be used when digitally printing the film. Accordingly, all decorations on the film are reproduced with the three color components cyan, magenta, yellow and the black component key as color depth. With this color system, the entire color space commonly used can be covered.
  • different batches of the film according to the invention have a consistently stable opacity and the gloss level of the film can also be reproduced in a stable manner.
  • the high printing speeds mean that a large amount of printed film can be produced in a short time.
  • a change in decoration when printing the films can also be implemented with very little effort.
  • the smooth surface of the film is printed before a structure is applied, the ink flight in the printing process is always identical due to the smooth surface and a consistently stable process sequence is achieved, which results in a consistently high quality in the printed image.
  • the method according to the invention is characterized in that the material-locking connection between the film and the base body is produced by welding, gluing or sealing.
  • the bonding of the film according to the invention to the base body can be carried out, for example, by means of a hot-melt adhesive comprising polyurethane, ethylene-vinyl acetate copolymer (EVA), polyalphaolefins (APAO) or polyolefin.
  • EVA ethylene-vinyl acetate copolymer
  • APAO polyalphaolefins
  • the hot-melt adhesive is applied as a separate layer which is arranged between the base body and the film.
  • the bonding can be carried out in this form in a commercially available calender.
  • the second functional layer of the film in this embodiment has a primer which serves as an adhesion promoter between the base body, the hot melt adhesive and the film.
  • the second functional layer of the film preferably also has a primer and sealing wax, which serves as an adhesion promoter between the base body and the film.
  • the film is sealed to the base body by the application of heat, preferably in a commercially available calender.
  • the second functional layer of the film has or consists of at least one copolymer of polypropylene or at least one homopolypropylene or a combination of these.
  • the second functional layer thus enables optimal welding of the base body to the film under the influence of heat.
  • the base body is welded to the film, whereby the film does not have a second functional layer. Welding is preferably carried out in a commercially available calender.
  • the film according to the invention does not have a second functional layer.
  • the film according to the invention is preferably laminated to a base body whose upper layer, i.e. the layer to which the film is laminated, consists of the same material or a similar material or a combination of materials from similar material groups as the main layer of the film.
  • the lamination can be carried out in a commercially available two or three roller calender.
  • the edge strips can then be cut out of the laminated plate-shaped base body in the desired width.
  • commercially available digital printers for the industrial sector can advantageously be used. It is particularly advantageous that the decorative print does not have to be applied to narrow edge bands, which may also have a structured surface, as is conventional. It is therefore not necessary to have extra digital edge band printing systems for medium and thick materials, which are essential for printing narrow edge bands.
  • This embodiment of the invention therefore leads to savings in investment costs, since commercially available label printers in digital design and calender.
  • the production lines are advantageously shorter, so that the production lines can be worked on in a more space-saving manner.
  • a calender is a system that has several heated rollers arranged on top of one another and is suitable for welding, sealing or gluing several layers.
  • the heated rollers hot-laminate the base body with the printed film.
  • the temperature of the base body is typically about 180°C to 250°C.
  • the roller temperature is typically about 30°C to 120°C.
  • the film and the base body are typically welded together with a pressure between 0.5 bar and 50 bar.
  • the base body is produced by extrusion, which is a process well known in the art.
  • the base body has a temperature of about 180°C to 250°C when it exits the nozzle of the extruder and is then transferred to the calender for lamination with the film according to the invention.
  • the film is welded to a base body in a calender that has 2 or 3 heated rollers.
  • the base body is produced, for example, by extrusion and typically leaves the nozzle of the extruder at a temperature in the range of 180 °C to 250 °C.
  • the base body is then introduced together with the printed film between a first and a second roller of the calender.
  • the temperature of the first roller is typically in the range of 40 °C to 120 °C and the temperature of the second roller is in the range of 40 °C to 120 °C.
  • the base body and film are then passed around the second roller and then between the second roller and a third roller.
  • the third roller typically has a temperature in the range of 30 °C to 90 °C.
  • the base body After the base body exits the nozzle of the extruder, the base body cools down due to the ambient air and the lower temperature of the calender rolls, so that the base body has a temperature in the range of 90 ° to 120 °C when laminated with the film by the calender rolls.
  • infrared radiators can be used in the process according to the invention to heat the materials (film and base body) before they are fed into the calender. Additional heat input may be necessary, for example, if the base body has cooled down too much for lamination (for example below 90°C) or if the film to be laminated with the base body is very thick.
  • the effect of the calender creates an essentially complete bond between the molecules of the base body and the film or between the base body, hot melt adhesive and film. This bond is material-locking and can only be broken by destroying the bonding partners. There is therefore no risk of delamination during subsequent use of the laminated base body and a high durability of the laminated base body, such as the laminated edge strip, can be guaranteed.
  • the entire process can be carried out in successive process steps in a corresponding production line (inline process).
  • the residual heat from the extrusion process of the base body can be used during welding.
  • individual process steps can also be carried out offline.
  • Offline in this case means, for example, that the film according to the invention is produced and stored until use.
  • Base bodies are also produced and stored temporarily. If required, for example when an order is placed by a customer, a film according to the invention is then laminated onto a base body according to the method according to the invention.
  • the base body and optionally the film are heated, for example by infrared (IR) radiators, in order to ensure error-free lamination.
  • IR infrared
  • the film is made of the same material or a similar material or a combination of materials from similar material groups as the upper layer of the base body, i.e. the layer onto which the film is laminated.
  • This has the advantage that a particularly durable welding of the printed film to the base body is achieved in the calender.
  • materials from the group of acrylonitrile butadiene styrene (ABS), polyvinyl chloride (PVC), polycarbonate (PC), polystyrene (PS), thermoplastic polyurethane (TPU) and mixtures thereof can be combined well with one another.
  • a base body with an upper layer made of ABS can be combined very well with a printed film made of ABS, PS, PMMA, TPU, PC, PVC or mixtures thereof in the process according to the invention.
  • Another group of materials that can be combined with one another are polypropylene (PP), low-density polyethylene (PE-LD), high-density polyethylene (PE-HD) and mixtures thereof.
  • PP polypropylene
  • PE-LD low-density polyethylene
  • PE-HD high-density polyethylene
  • a base body with an upper layer made of PP can be combined very well with a printed film made of PP or PE or mixtures thereof in the process according to the invention.
  • a base body with an upper layer selected from the materials of one of the groups mentioned is welded together with a printed film made of a material selected from the same group as the upper layer of the base body.
  • Lamination by sealing or gluing is particularly advantageous when the base body and film are not made of the same or a similar material, since the primer in the second functional layer of the film provides an additional adhesion promoter.
  • the method further comprises the step of applying or introducing a structure onto or into the film during or after the application of the film onto the base body.
  • a structure is simultaneously introduced into the film and, if appropriate, into the base body, so that the laminated base body has a surface structure.
  • a print is applied to the film before it is applied to the base body.
  • the film is then laminated to the base body and the structuring is carried out at the same time. This eliminates all the difficulties that arise when printing on a structured surface, as is known from the prior art.
  • the method according to the invention can be used to produce laminated base bodies whose surface structure fits precisely with the decoration of the printed film.
  • the calender rollers can be arranged in different geometries and at least one calender roller has an embossing. This embossing is transferred to the film and possibly to the base body in the form of a structure during the welding of the base body to the printed film.
  • the calender typically achieves an embossing depth of between 30 ⁇ m and 150 ⁇ m. If the film laminated to the base body is thinner than the embossing depth, the structure of the calender rollers is transferred to the base body.
  • the embossing of the calender rollers can vary depending on the desired structure. It is therefore possible to reproduce a large number of conceivable decorative structures. With the method according to the invention, all conceivable decorations that are printed on the film can therefore be combined with all structures available through the embossing of the calender rollers.
  • the decorations that are printed on the films are matched to the embossing of the calender rollers used. This means that the surface structure embossed on the base body during lamination can be applied with a precise fit to the decoration of the printed film.
  • one roller of the calender is provided with an embossing and the other rollers are smooth.
  • the method according to the invention makes it possible to laminate a printed film with a base body, optionally with simultaneous application of a structure with consistently high quality for large quantities.
  • a structure is applied to the film of the composite material after the base body has been firmly bonded to the film.
  • a lacquer printing process can be used for this.
  • an embossing is introduced into the lacquer layer by a printing unit with a highly viscous lacquer system and a structural sleeve.
  • two important elements of a decoration can be applied to a composite material, in particular in the form of an edge strip.
  • optical features in the form of the decorative print on the film and, on the other hand, haptic features through the applied surface structure.
  • Any surface structure and any decoration can be applied and combined with one another. The combination of decoration and surface structure is determined solely by the customer's wishes.
  • the surface structure is a perfect match to the decoration of the printed film.
  • a wood grain can be reproduced in color on the print of the film and also applied as a structure, with the decoration and surface structure matching each other precisely.
  • the term “exact fit” describes the positioning of the decoration, i.e. the printed film, to the surface structure in such a way that no difference in the position of the decoration and the surface structure can be perceived by the human senses.
  • the visual impression thus corresponds to the haptic impression of the composite material, particularly in the form of an edge strip.
  • the illustration of a wood grain is intended here only as an example for clarification.
  • the great advantage of the present invention is, among other things, that the smooth film is printed on and structures are only introduced after printing.
  • Numerous processes are known from the prior art in which structured surfaces are to be printed.
  • the ink when printing ink onto a structured surface, the ink usually runs into the embossed valleys, so that color accumulates in deeper areas of the decorative structure, which is then missing in other areas. This influences the desired color impression of the decoration and makes it very difficult to reproduce the decoration 1:1.
  • not all surfaces of the structure can be reached with conventional printing technology, so that the ink cannot be applied evenly to the entire structured surface. The surface is therefore not printed over the entire area as desired. So-called undersaturated areas arise, which appear as areas with a different color to the decorative template.
  • the color of the decoration does not appear strong enough, but rather faded. This also means that the printed decoration does not match the surface structure of the composite material or the edge strip perfectly. However, the quality of the visual and haptic impression, especially of an edge strip, is an important criterion for a customer's purchase decision.
  • a layer of lacquer can also be applied to the side of the base body provided with a film. This allows the gloss level of the composite material to be influenced and adapted to customer requirements. Furthermore, lacquer embossing can take place both after welding and after gluing or sealing the base body with the film.
  • the base body and the film are welded in a calender.
  • the calender has two armored rollers and one smooth roller.
  • the surface properties of the smooth roller create an adhesive force on the film, which means that it can be constantly guided through the calendering process. This makes the calendering process particularly smooth.
  • a structural embossing can then be carried out using lacquer embossing. This has the advantage that even after lamination in a calender, the laminated film with a smooth surface can be printed with a decoration before the lacquer embossing is applied.
  • the strip-shaped base body already has the dimensions of an edge strip and the film according to the invention is made to these dimensions, i.e. cut to size. This process corresponds to the classic single-strand extrusion.
  • the method according to the invention can be used to produce high-quality edge strips in a cost-efficient and extremely economical manner.
  • the invention provides a production line for carrying out the method according to the invention.
  • the production line has at least one inkjet system and a device for carrying out a calendering process.
  • the inkjet system according to the present invention is preferably a digital printer.
  • the calender can be a 2 or 3 roll calender.
  • the calender has an embossing roller for applying a structure.
  • the production line also has a printing unit for lacquer embossing.
  • a highly viscous lacquer system and a sleeve structure are used for lacquer embossing.
  • the advantages of lacquer embossing are the low costs of creating a sleeve compared to creating a new embossing roller, as well as the short set-up times and the quick changes when changing products.
  • the process according to the invention and the associated production line are more economical than the prior art processes for numerous reasons.
  • the base body and the film are connected. Since the base body is not printed directly, it does not need to be primed, which also eliminates the need for corona treatment, plasma activation or flame treatment of the base body. Corresponding production facilities therefore do not need to be provided. Fewer components are therefore required in the production line, which reduces energy costs and maintenance costs. In particular, the elimination of corona treatment also eliminates the OZONE pollution caused by this in a corresponding facility.
  • a primer and corona treatment, plasma activation or flame treatment is, however, provided for in the production of the film according to the invention. However, this can be carried out as a separate production process independently of the process for bonding the base body to the film. The film according to the invention can then be stored until further use.
  • the production process can be accelerated and new designs can be changed more quickly.
  • the production line can be started up more quickly and at lower cost. There is no need to change the printing units as in gravure printing, nor is there any need to mix and fill the doctor blade boxes with colors that match the design after they have been cleaned of the colors previously used.
  • Figure 1 (A) shows the layer structure of a film 100 according to the invention.
  • the film 100 has a main layer 10 and a first functional layer 20 and a second functional layer 30.
  • the first functional layer 20 of the film 100 is arranged on a first side of the main layer 10a and the second functional layer 30 of the film on a second side of the main layer 10b.
  • Figure 1 (B) schematically shows a further layer structure of the film 100 according to the invention.
  • the film 100 has a main layer 10 and a first functional layer 20 and a second functional layer 30.
  • the first functional layer 20 of the film 100 is arranged on a first side of the main layer 10a and the second functional layer 30 of the film on a second side of the main layer 10b.
  • a color layer 11 is applied to the first side of the main layer 10a.
  • Figure 1 (C) also schematically shows a layer structure of the film 100 according to the invention. This corresponds to the Figure 1 (B) shown structure, but without a second functional layer.
  • Figure 2 shows a comparison of the tearing behavior of an edge strip 60 according to the invention and a conventional edge strip 61.
  • the difference in the tearing behavior at small radii is clearly visible. While the decoration that was applied to a film according to the invention using digital printing ( Fig. 2A ), shows almost no changes, in conventional gravure printing (direct printing on the base body) clear tears in the printed image as well as color changes due to stress whitening 90 in the main material are visible ( Fig. 2B ).
  • the film according to the invention is particularly advantageous because it conceals the influence of stress whitening.
  • Figure 3 shows an embodiment of the method according to the invention, in which a plate-shaped base body 50 is used.
  • a film 10 is printed over a large area and applied to a plate-shaped base body according to the invention.
  • the edge strips 60 are then cut out of the composite material in the desired width.
  • Figure 4 shows a comparison of the printing results according to the method of the invention ( Fig. 4A ) using a conventional printing process ( Fig. 4B ).
  • a decoration was printed on a smooth foil using digital printing.
  • the structural embossing is then only carried out after the digital printing when the foil is applied to the base body. Since the structural embossing no longer influences the ink application, the printed image of the decoration is also be uniform after embossing and show no failures.
  • Fig. 4B conventional edge strips for furniture were examined.
  • the digital printing of the decor was carried out here after the structure embossing. This is disadvantageous.
  • the printing ink 70 runs into the embossing valleys, so that color accumulates in deeper areas of the decor structure, which is then missing in other places. This influences the desired color impression of the decor and makes a 1:1 reproduction of the decor almost impossible.
  • the printing ink 70 is not evenly distributed over the entire structured surface. This means that the area coverage is not homogeneous, resulting in undersaturated areas which appear as deviating color areas from the original. Overall, the color of the decor does not appear strong enough, but rather faded. Furthermore, there may be deviations in the gloss in the decor which are caused by areas not wetted with ink.
  • Figure 5A represents a calender 200 with three rollers 110, 111, 112.
  • the film 100 according to the invention and the base body 50 from the extruder 120 are fed to the calender 200 between the rollers 112 and 111.
  • the composite material 300 then runs between the rollers 111 and 110 and leaves the calender 200.
  • Figure 5B represents a calender 201 with two rollers 110, 111.
  • the film 100 with the base body 50 which comes from the extruder 120, is guided through the rollers 110, 112 and laminated in the process.
  • Figure 6A showed an edge strip 61 from the prior art, which is attached to a plate-shaped workpiece 66.
  • the edge strip is according to the EN 10 2015 106 241 A1 constructed and, in the embodiment shown, comprises a film 101 with a thickness of more than 50 ⁇ m.
  • the film 101 is applied to a base body 51 and a decorative layer 71 (i) is located on the top of the film.
  • a safety radius 130 is clearly visible in the figure (ii) in which the film 101, the base body 51 and the plate-shaped workpiece 66 can be seen.
  • the narrow side of the film 101s is clearly visible through the safety radius 130.
  • the narrow side of the film 101s is therefore also clearly visible due to the thickness of the film.
  • the narrow side of the film 101s has the basic color of the film, which is then perceived by a viewer in the front view (iii) as a clearly perceptible frame.
  • Figure 6B represents an edge strip 60 according to the invention, which is attached to a plate-shaped workpiece 66.
  • the film 100 according to the invention is significantly thinner than the films 101 known from the prior art, as shown in Figure (i).
  • the film 101 has a decorative layer 71 and is applied to the base body 50.
  • the narrow side of the film 100s is so narrow in the safety radius 130 at the edge of the plate-shaped workpiece 66 that it is not perceived by an observer. In the front view (iii) therefore, advantageously no frame effect is noticeable.
  • a film according to the invention was present, the main layer of which was 18 ⁇ m thick.
  • the main layer consisted of BOPP and 25 wt.% TiO 2 .
  • the main layer was corona treated on both sides.
  • the first functional layer had a thickness of 2 ⁇ m and consisted of a water-based primer.
  • the second functional layer also had a thickness of 2 ⁇ m and consisted of polypropylene copolymers.
  • a base body was coated with several layers of primer.
  • a plate served as the plate-shaped base body.
  • the L*a*b* values of the plate without primer were measured using a color spectrometer.
  • several layers of a white primer in the form of a white UV-curable printing ink were applied one after the other.
  • the application quantity was approx. 3g/m 2 (80 grid/70 Shore hardness).
  • the L*a*b* values were measured again using a color spectrometer.
  • the opacity of the applied layers of primer was measured using a color spectrometer.
  • the following table shows an overview of the measurement results. Applying several layers of primer to a base body before printing with a decoration corresponds to the state of the art process.
  • the film according to the invention contained PP and 25 wt% TiO 2 as a filler.
  • the first functional layer was a transparent primer made of a solvent-based UV-curable Paint.
  • the L*a*b* values and the opacity were also measured for the base body with the film using a color spectrometer.
  • the film also contained a first functional layer (2 ⁇ m thick) in the form of a primer (printing primer).
  • the first functional layer was a transparent solvent-based UV-curable varnish.
  • the film also had a second functional layer with an adhesion promoter to the base body (2 ⁇ m thick) in the form of a layer of polypropylene copolymers.
  • the film was laminated onto samples of plate-shaped base bodies (100 mm x 100 mm x 1 mm) of various colors, thereby producing composite materials according to the invention. Additional samples of the same base bodies of various colors were provided without film.
  • the base bodies were made of polypropylene.
  • the sampling of two similar decors from a conventional printing system that works with gravure printing was compared with a production line according to the invention.
  • the decor HR10726 was produced with conventional
  • the 10626 decor was produced using the gravure printing process and the 10626 decor was produced using the digital printing process according to the invention.
  • the system times for sampling the decors were recorded.
  • the sampling included lacquer embossing after the base body had been welded to the film.
  • the film was printed with the desired decor before welding. The difference is clearly visible both in the time required to produce the decor and in the quantities used. This is explained by the preparation of the film before the sampling process. This saves valuable resources and system capacity, which offers an enormous economic advantage.
  • the first step in producing a digitally generated decoration was through digital image processing, and then a film was printed onto it as a semi-finished part for further processing.
  • the printing was done using an inkjet system that applies the decoration to the film at a constant speed of 50 m/min.
  • the film was laminated onto colored, variable-thickness base bodies for processing on a production line.
  • the film was fed to the base body in the calendering process after the extrusion process.
  • the calender structure consisted of 2 armored rollers (rollers 1 & 3), which are arranged at the top and bottom, and a smooth roller (roller 2). The material was fed through the calender in an S-shape.
  • a varnish was applied using a gravure printing process to adjust the gloss level and ensure surface durability.
  • An embossing was applied to the printing unit using a highly viscous varnish system and a structural sleeve, which could be adapted haptically and optically thanks to the advantages of the varnish printing process.
  • a film according to the invention was present, the main layer of which was 35 ⁇ m thick.
  • the main layer consisted of BOPP.
  • the main layer was corona treated on both sides.
  • the first functional layer had a thickness of 2 ⁇ m and consisted of a water-based primer.
  • the second functional layer also had a thickness of 2 ⁇ m and consisted of polypropylene copolymers.
  • a 4 ⁇ m thick ink layer was printed on the first side of the main layer.
  • the ink layer was an aqueous ink with 40% TiO 2 .
  • a film according to the invention was present, the main layer of which was 35 ⁇ m thick.
  • the main layer consisted of BOPP.
  • the main layer was corona treated on the first side.
  • the first functional layer had a thickness of 2 ⁇ m and consisted of a water-based primer.
  • a second functional layer was not applied.
  • a 4 ⁇ m thick ink layer was printed on the first side of the main layer.
  • the ink layer was an aqueous ink with 40% TiO 2 .
  • the opacity of films produced according to Example 6 was measured.
  • the ratio of the degree of reflection of a sheet of film on a black background in the form of an aluminum Dibond plate RAL 9005 and the same sheet of film on a white background in the form of an aluminum Dibond plate RAL 9003 was determined using a spectrophotometer.
  • the opacities were between 65 and 70%.
  • the embodiment corresponds to embodiment 3, except that a white, unprinted film with the following properties was laminated onto base bodies of different colors: Thickness of the main layer: 35 ⁇ m Main layer material: Copolymers of polypropylene Filler content of the film in the main layer: 0% Color layer: aqueous ink with 40% TiO 2 content
  • the film also contained a first functional layer (2 ⁇ m thick) in the form of a primer (printing primer).
  • the first functional layer was a transparent solvent-based UV-curable varnish.
  • the film also had a second functional layer with an adhesion promoter to the base body (2 ⁇ m thick) in the form of a layer of polypropylene copolymers.
  • the film was laminated onto samples of plate-shaped base bodies (100 mm x 100 mm x 1 mm) of various colors, thereby producing composite materials according to the invention. Additional samples of the same base bodies of various colors were provided without film.
  • the base bodies were made of polypropylene.

Landscapes

  • Laminated Bodies (AREA)
EP23204840.5A 2022-10-21 2023-10-20 Baguette de bord Pending EP4357146A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP22203007 2022-10-21

Publications (1)

Publication Number Publication Date
EP4357146A1 true EP4357146A1 (fr) 2024-04-24

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EP (1) EP4357146A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0562166A1 (fr) 1992-03-20 1993-09-29 Alkor Gmbh Kunststoffe Bande de lisière en résine polymérique, méthode de sa fabrication et son utilisation
WO2008089967A1 (fr) * 2007-01-27 2008-07-31 Rehau Ag + Co Profilé plastique pouvant être décoré et procédé de réalisation associé
DE102015106241A1 (de) 2015-04-23 2016-10-27 Döllken-Kunststoffverarbeitung Gmbh Verfahren zum Herstellen eines dekorativen Profilkörpers, insbesondere einer Kantenleiste
WO2017067683A1 (fr) * 2015-10-22 2017-04-27 Fritz Egger Gmbh & Co. Og Profilé d'arête pour matériau en forme de plaque et matériau en forme de plaque
EP3338594A1 (fr) 2016-12-23 2018-06-27 REHAU AG + Co Arrangement profil

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0562166A1 (fr) 1992-03-20 1993-09-29 Alkor Gmbh Kunststoffe Bande de lisière en résine polymérique, méthode de sa fabrication et son utilisation
WO2008089967A1 (fr) * 2007-01-27 2008-07-31 Rehau Ag + Co Profilé plastique pouvant être décoré et procédé de réalisation associé
DE102015106241A1 (de) 2015-04-23 2016-10-27 Döllken-Kunststoffverarbeitung Gmbh Verfahren zum Herstellen eines dekorativen Profilkörpers, insbesondere einer Kantenleiste
WO2017067683A1 (fr) * 2015-10-22 2017-04-27 Fritz Egger Gmbh & Co. Og Profilé d'arête pour matériau en forme de plaque et matériau en forme de plaque
EP3338594A1 (fr) 2016-12-23 2018-06-27 REHAU AG + Co Arrangement profil

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