EP2094485A1 - Élément transparent à plusieurs couches - Google Patents

Élément transparent à plusieurs couches

Info

Publication number
EP2094485A1
EP2094485A1 EP07818893A EP07818893A EP2094485A1 EP 2094485 A1 EP2094485 A1 EP 2094485A1 EP 07818893 A EP07818893 A EP 07818893A EP 07818893 A EP07818893 A EP 07818893A EP 2094485 A1 EP2094485 A1 EP 2094485A1
Authority
EP
European Patent Office
Prior art keywords
layer
component according
lower layer
layers
upper layer
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.)
Withdrawn
Application number
EP07818893A
Other languages
German (de)
English (en)
Inventor
Manfred Rudlof
Erich Pöhlmann
Peter Michel
Raimund Prinz
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.)
KRD Coatings GmbH
Original Assignee
KRD Coatings 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 KRD Coatings GmbH filed Critical KRD Coatings GmbH
Publication of EP2094485A1 publication Critical patent/EP2094485A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/02—Combined thermoforming and manufacture of the preform
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/14—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor using multilayered preforms or sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C67/00—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00
    • B29C67/0044—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00 for shaping edges or extremities
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/02—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions
    • B32B3/04—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions characterised by at least one layer folded at the edge, e.g. over another layer ; characterised by at least one layer enveloping or enclosing a material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
    • B29C53/02—Bending or folding
    • B29C53/04—Bending or folding of plates or sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0018—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds having particular optical properties, e.g. fluorescent or phosphorescent
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/778—Windows
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/40—Properties of the layers or laminate having particular optical properties
    • B32B2307/412—Transparent
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2333/00—Polymers of unsaturated acids or derivatives thereof
    • B32B2333/04—Polymers of esters
    • B32B2333/12—Polymers of methacrylic acid esters, e.g. PMMA, i.e. polymethylmethacrylate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2369/00—Polycarbonates

Definitions

  • the present invention relates to a transparent, multi-layer and sheet member, preferably for use as a disc in a vehicle, comprising at least an upper layer and a lower layer of a transparent material, which are interconnected, wherein each of the layers has a respective edge region with an end face having.
  • the plastic composite disk consists of an inner layer or inner disk of a polycarbonate (PC) plastic, an outer layer or an outer disk made of polymethylmethacrylate (PMMA) plastic and a layer of thermoplastic polyurethane (TPU) arranged between these disks.
  • PC polycarbonate
  • PMMA polymethylmethacrylate
  • TPU thermoplastic polyurethane
  • a disadvantage of the plastic composite pane according to EP 1 577 084 A1 is the hereby common lateral exposed edge, which is exposed to the weather, whereby in continuous use from this point, and in particular starting from the joints between the layers, a delamination of the individual layers can be done ,
  • resulting from the laterally exposed edge disadvantages in terms of visual or aesthetic appearance.
  • the laterally exposed edge tends to damage the pane in this area.
  • the object of the invention is therefore to provide a transparent, multilayer and flat component that overcomes the problems of the prior art.
  • a component of the type mentioned which is compared to the generic component is improved in that at least the edge region of the upper layer is at least partially bent in the direction of the lower layer.
  • a significantly improved appearance is achieved in the edge region of the component, while achieving a significantly increased resistance to environmental influences.
  • the resulting from the bonding of the layers and visually disadvantageous joints in the area of their face are therefore no longer directly visible to the end user.
  • said joints continue to be Damage from the outside and protected against rough environmental influences.
  • this is also no longer visible from the outside in the component according to the invention.
  • the lower layer facing surface of the upper layer with the end face of the lower layer is at least partially in abutment. This results in a favorable visual appearance of the edge region and a good protective effect with respect to the joints against environmental influences.
  • end face of the upper layer may also be advantageous for the end face of the upper layer to point substantially in the opposite direction as the end face of the lower layer. As a result, the visual appearance can be improved again, and there is an excellent protection of the joints against environmental influences.
  • the end face of the upper layer may point substantially in the same direction as the end face of the lower layer. This can be particularly easily realized in terms of manufacturing technology while at the same time providing good visual appearance and good joint protection.
  • end faces may be flush with each other. This, too, can be realized particularly easily in terms of production technology.
  • bent edge region viewed in cross section, has the shape of a leg. This form is easy to manufacture and easy to handle.
  • the leg is arranged substantially perpendicular to the surface of the upper and / or lower layer in the region adjacent to the edge region. This has assembly and construction advantages.
  • the length of the leg corresponds to 1.5 to 2.5 times the thickness of the component in the region adjacent to the edge region. This length is on the one hand sufficient to achieve the desired visual appearance of the edge region of the component. On the other hand, the length is not too big to deal with problems to cause the assembly. At the same time the risk of breaking off the leg during assembly or transport is significantly reduced at this length.
  • the thickness of the leg is smaller than the thickness of the component in the region adjacent to the edge region. This offers advantages in terms of assembly of the component.
  • the upper layer and / or the lower layer is provided with a coating at least on the surface facing away from the respective opposite layer.
  • a coating makes it possible to give the transparent component very specific (surface) properties.
  • the coating is provided in the form of a lacquer. Paints can be applied comparatively easily with very small and uniform layer thicknesses.
  • the varnish is a silicate varnish or a siloxane varnish or a nano varnish.
  • These paints give the respective surfaces e.g. a high scratch resistance and ensure a durable, high quality and aesthetically pleasing surface.
  • At least one further layer of a transparent material is arranged between the upper layer and the lower layer.
  • this layer can perform optical functions, e.g. as a UV filter and / or as IR protection.
  • connection between the upper layer and the lower layer is produced by the at least one further layer.
  • mechanical fasteners can be omitted.
  • the material for at least one layer consists of a polymeric material, preferably of plastic. These materials are easy to process, have favorable optical properties and also have a low density.
  • At least one of the layers has been produced in an injection and / or pressing process, preferably in an injection-compression molding process.
  • At least one of the layers consists of a film.
  • Material in this form can be provided easily and inexpensively and can be relatively easily processed.
  • the heat resistance of the layer produced in the injection compression molding process is higher than that of the other layers. This opens up the possibility of combining the layers in a relatively simple manner.
  • the component has a three-layer structure, with an upper layer of a plastic film, in particular PMMA, a lower layer of an injection-molded plastic, in particular polycarbonate (PC), and arranged between the first and second layer layer of plastic film, in particular TPU.
  • the lower layer consisting of PC, as impact-resistant, non-splintering mechanical support
  • the upper layer consisting of PMMA
  • the intermediate layer of TPU serves as a connection for the PC / PMMA layer in the sense of a permanent bonding.
  • the layer produced by injection compression molding has a thickness of between 3 and 5 mm. At this thickness results in a sufficient mechanical stability of the corresponding position while still good optical properties and low weight. It may be advantageous that the thickness of the plastic film of the upper layer is between 0.5 and 1, 5 mm. This thickness is sufficient for the desired function, while the weight can be kept low at the same time.
  • the component has an upper layer made of a polymethyl methacrylate (P M MA FoI ie), a lower layer of polycarbonate (PC) and arranged between the upper and lower layer layer of thermoplastic polyurethane (TPU).
  • PC polymethyl methacrylate
  • PC is a material with high impact strength, resiliency after mechanical impact, high temperature resistance and high transparency. Since PC has a relatively poor weather resistance, and is colored and brittle under permanent UV radiation, this material is not suitable for the outer layer of a corresponding disc.
  • Polymethylmethacrylate (PMMA) is suitable for this purpose, which likewise has high transparency, has high scratch resistance and is very weather-resistant, and it is practically insensitive to UV irradiation.
  • thermoplastic polyurethane (TPU) is arranged between the upper or outer PMMA layer and the lower or inner PC layer.
  • TPU is a transparent, highly elastic material with high resilience.
  • the TPU layer provides the connection between the upper and lower layers, and on the other hand, it acts as a buffer between the two layers, which absorbs mechanical stresses.
  • Said TPU layer can be realized by a film or by liquid or pasty adhesive.
  • a sealing device is provided in the region of the end faces of the layers. This sealing device again increases the protection of the joints between the layers from environmental influences.
  • the invention also relates to a body part, preferably a tailgate, of a vehicle having a component according to at least one of the aforementioned advantageous embodiments.
  • the invention further relates to a vehicle with a component according to at least one of the aforementioned advantageous embodiments. Furthermore, the invention relates to a method for producing the component according to the invention according to at least one of the aforementioned advantageous embodiments, comprising the steps: producing the lower layer; Lamination of the upper layer to the lower layer, wherein during the lamination, the bending of the edge region takes place; and pressing the layers. In this case, first of all the lower layer, for example in an injection and / or pressing process, is produced as a mechanically stable basic body.
  • the upper layer for example in the form of a film, is applied to the lower layer serving as a basic body or master pattern in a laminating process, wherein the edge region of the upper layer is transferred or bent in the direction of the lower layer within the laminating process by suitable process control , By the subsequent pressing an intimate and durable connection between the layers is realized.
  • the invention relates to a method for producing the component according to the invention according to at least one of the aforementioned advantageous embodiments, comprising the steps: producing the lower layer; Laminating the upper layer to the lower layer; Pressing the layers and thermoforming of the edge region, wherein the bending of the edge region takes place during the thermoforming.
  • the lower layer may be produced in an injection-compression molding process. This makes it possible to produce a large flat component with excellent optical properties in a comparatively simple manner.
  • At least one of the previously described methods comprises the further step of laminating at least one further layer to the lower layer prior to the step of laminating the upper layer.
  • the adhesion between upper and lower layer can be increased. be increased.
  • the additional layer can take on additional functions, eg the reduction of thermal stresses due to different coefficients of thermal expansion of the upper and lower layer, as a UV filter or IR protection.
  • the at least one further layer may be heated to a defined temperature prior to lamination. This increases the adhesion to the adjacent layers and improves the transparency.
  • the pressing of the layers takes place at a pressure of at least 150 N / cm 2 , preferably at a pressure of 200 N / cm 2 .
  • a pressure of at least 150 N / cm 2 preferably at a pressure of 200 N / cm 2 .
  • At least one of the aforementioned methods comprises the additional step of sealing the laminating joint.
  • the sealing of the laminating joint results in increased safety against environmental influences for the component.
  • Fig. 1 upper layer for an inventive component in the state before bending over the edge region in plan view;
  • FIG. 2a section of a first embodiment of the component according to the invention in
  • FIG. 2c detail of a third embodiment of the component according to the invention in
  • Cross-section; 3 shows a flowchart for a preferred method for producing the component according to the invention
  • FIG. 4 shows a flowchart for a further preferred method for producing the component according to the invention.
  • the layer 1 shows, by way of example for the upper layer 2 of a component according to the invention, the edge region 4 before bending over.
  • the layer is made of PMMA, but other transparent materials are conceivable.
  • the layer has a coating which, for example, has a high scratch resistance. Silicate or siloxane coatings or so-called nano-lacquers are suitable for this purpose.
  • heating wires for a de-icing function are printed on the upper layer. The situation is even, but it is also possible that the situation is, for example, convexly curved.
  • Fig. 2a shows a detail of a first embodiment of the component according to the invention in cross section.
  • the component 1 is in this case three layers with an upper layer 2 made of PMMA, a lower layer 3 made of PC produced in an injection-compression molding process, and a layer 10 of TPU arranged between the upper and lower layers in the form of a film.
  • the component 1 may have other layers that take over very specific functions.
  • the outer surfaces of the upper layer and the lower layer may be coated with a scratch-resistant paint.
  • another film may be disposed between upper and lower layers, e.g. provides for IR protection.
  • the thickness of the PMMA layer is 1 mm, while the thickness of the PC layer is 4 mm, for example.
  • the TPU film is much thinner than the other two layers.
  • the bend results in a leg, which is arranged substantially perpendicular to the surface of the component in the region adjacent to the edge region.
  • the end face 6 of the upper layer 2 and the end face 7 of the lower layer 3 are flush with each other. Both end faces essentially point in the same direction.
  • the thickness of the leg is less than the thickness of the component in the region adjacent to the bent edge region.
  • a sealing device 11 is provided in the area of the end faces of the layers. This may be, for example, adhesive applied in the pasty state and cured in the ready-to-install component.
  • section according to FIG. 2 a shows a component whose surface is flat, with the exception of the bent-over edge region, the component can be provided in the corresponding region, e.g. also have a convex surface.
  • the component can be provided in the corresponding region, e.g. also have a convex surface.
  • many different geometries are conceivable, which depend on the design or the shape of the object in which the component is used.
  • FIG. 2b shows a detail of a second embodiment of the component according to the invention in cross section. In order to avoid repetition, only the differences from the first embodiment according to FIG. 2a will be discussed.
  • Fig. 2c shows a detail of a third embodiment of the component according to the invention in cross section. To avoid repetition, only the differences from the first embodiment 2a will be discussed.
  • FIG. 2b only the edge region 4 of the upper layer 2 is bent in the direction of the lower layer 3, so that the edge region 5 of the lower layer 3 its original level Maintains shape.
  • the lower layer 3 facing surface 8 of the upper layer 2 is in the end face 7 of the lower layer 3 in Appendix.
  • the end face 6 of the upper layer here has in the opposite direction as the end face 7 of the lower layer.
  • the surface 8 of the upper layer 2 partially contacts the surface 9 of the lower layer facing away from the upper layer.
  • a sealing device as shown in Fig. 2a is also missing here, but it is conceivable to arrange such a sealing device in the region of the end face 6 of the upper layer 2.
  • Fig. 3 shows the flow chart for a preferred method for producing the component according to the invention.
  • the lower layer for example, in an injection-compression molding method, produced with a thickness of eg 4 mm.
  • the thus obtained, mechanically loadable lower layer already has the desired geometry of the component, such as a convex rear window on. It is then heated to a defined temperature.
  • the upper layer which is in the form of a film or a sheet, and the intermediate layer to be arranged between the upper and lower layers, which is likewise in the form of a film or a sheet, are heated to a respectively defined temperature.
  • the layers heated independently of one another are combined with one another in a lamination process, wherein during the lamination process a bending of the edge region, at least of the upper layer in the direction of the lower layer, takes place.
  • the combined layers are pressed with a defined surface pressure, for example 200 N / cm 2 , so that an intimate connection between them is formed.
  • the laminating joints resulting from the lamination are sealed between the individual layers, for example by applying a sealant. It is conceivable to omit the last process step of sealing, because sufficient protection of the laminating joints has already been achieved by a suitable bending geometry. It is also conceivable to apply the method only to two layers or more than three layers.
  • the lower layer for example, in an injection-compression molding method, produced with a thickness of eg 4 mm.
  • the thus obtained, mechanically loadable lower layer already has the desired geometry of Component, such as a convex shaped rear window on. It is then heated to a defined temperature.
  • the upper layer which is in the form of a film or a sheet, and the intermediate layer to be arranged between the upper and lower layers, which is also in the form of a film or a sheet, are heated to a respectively defined temperature.
  • the layers warmed up independently of each other are combined in a lamination process.
  • the combined layers are pressed with a defined surface pressure, for example, 200 N / cm 2 , so that an intimate connection between them is formed.
  • a thermoforming process the bend of the edge region of at least the upper layer in the direction of the lower layer.
  • the laminating fusions produced by the lamination are sealed between the individual layers, for example by applying a sealing compound. It is conceivable to omit the last method step of sealing with already sufficient protection of the laminating joints by a suitable bending geometry. It is also conceivable to apply the method to only two layers or to more than three layers. Furthermore, it is possible not to mold the desired geometry for the application during the production of the lower layer, but to do so only within the thermoforming process.
  • the component according to the invention has the advantage that the edge which is usual here laterally is no longer visible to the end user, which leads to a considerably improved appearance or aesthetics in this area.
  • the risk of damaging the edge is largely avoided in the component according to the invention.
  • the transparent, multilayer and sheet-like component in the transparent, multilayer and sheet-like component according to the invention, at least the edge region of the bent upper position in the direction of the lower layer.
  • the outer edge of the component is bent in the same direction, so that it is no longer visible to the end user in the installed state of the component.
  • the bend is in this case so that a leg is formed, which is arranged substantially perpendicular to the surface of the component in the region adjacent to the edge region.
  • a further increase in the resistance of said joints can be achieved by providing a sealing device in the area of the end faces of the layers, which ensures a corresponding sealing of this area.
  • the component preferably consists of three layers, i. a lower layer which primarily provides the necessary mechanical stability, an upper layer, and an intermediate layer arranged between the upper and lower layers.
  • the lower layer is preferably made of PC, which has a high impact resistance and high transparency
  • the upper layer is preferably made of PMMA, which also has a high transparency and beyond a much higher weather resistance, especially against UV Radiation, comprising.
  • PMMI polymethylmethacrylimide
  • the free surface of the lower PC layer points into the vehicle interior, while the free surface of the upper PMMA layer points away from the vehicle.
  • the PMMA layer is preferably treated with colorless UV protection additives, e.g. Benzophenone or benzotriazole added.
  • colorless UV protection additives e.g. Benzophenone or benzotriazole added.
  • their free surfaces may be provided with a scratch-resistant coating.
  • the intermediate layer which preferably consists of TPU, takes on the one hand the task of connecting or gluing the PC layer with the PMMA layer, on the other hand allows the TPU interlayer with their extremely high Dehn- or resilience a safe and long-lasting connection of the PC and PMMA layers, as the two materials PC and PMMA have different thermal expansion coefficients.
  • the TPU interlayer acts as a buffer and absorbs stresses due to the different thermal expansions, so that the delamination of upper and lower layer can be effectively avoided.
  • electrically conductive wires may be embedded, for example, take over the function of a disk heater or a radio antenna.
  • the component in particular when used as a vehicle window, has on its inner side and / or its outer side an opaque disk edge printing.
  • This printing protects on the one hand bonds in the edge region of the discs, which are often sensitive to light.
  • the printing on the edge of the disc protects components arranged such as e.g. Safety electronics, before the insight by third parties.
  • the edge of the print facing the interior of the disk preferably has a resolved structure, e.g. a dot pattern.
  • the lower layer is first produced, for example in an injection-compression molding method.
  • the injection compression molding process is particularly suitable for the production of large, flat components made of transparent plastic, since in comparison to the injection molding process usually used much lower clamping forces of the tool plates are necessary, which allow the use of smaller and cheaper machines.
  • due to the special process of injection-compression molding only very small shearing and thus orientation of the melt occur, which on the one hand benefits the dimensional stability and on the other hand the optical behavior.
  • the mechanically loadable lower layer obtained by the injection-compression molding process already has the desired geometry of the component, for example a convexly shaped vehicle rear window, and therefore represents a prototype for the subsequent laminating process.
  • the lower layer is then heated to a defined temperature .
  • the upper layer which is in the form of a film or a sheet
  • the intermediate layer to be arranged between the upper and lower layers which is likewise in the form of a film or a sheet, are heated to a respectively defined temperature.
  • the heating and pressing of the individual layers primarily ensures high transparency of the laminated component.
  • the layers warmed up independently of each other are combined in a lamination process. It is necessary that the material for the lower, serving as a master pattern layer, a higher heat resistance than the layers to be laminated, otherwise there may be a change in shape of the lower layer during lamination.
  • the edge region of at least the upper layer is bent in the direction of the lower layer.
  • the combined layers are pressed with a defined surface pressure of, for example 200 N / cm 2 , so that an intimate connection between them is formed.
  • the laminating joints formed by the lamination are preferably sealed between the individual layers, for example by applying a sealant.
  • the combination, preferably of the injection-compression molding method with a lamination method, is advantageous because the injection-compression molding method makes it possible to provide an optically outstanding, dimensionally stable and mechanically loadable master pattern to which the further layers can be applied in a comparatively simple and technically manageable manner. or tolerance problems of semi-finished products.
  • the lower layer is first produced, for example by means of an injection-compression molding method.
  • the mechanically loadable backing obtained by the injection-compression molding process preferably already has the desired geometry of the component.
  • the lower layer is then heated to a defined temperature.
  • the upper layer which is in the form of a foil or a sheet, and the between the upper and lower layers to be arranged intermediate layer, which is also in the form of a film or a sheet, heated to a particular defined temperature.
  • the layers warmed up independently of each other are combined in a lamination process.
  • the combined layers are pressed with a defined surface pressure, for example, 200 N / cm 2 , so that an intimate connection between them is formed. Thereafter, in a deep-drawing process, the bending of the edge region, at least the upper layer in the direction of the lower layer.
  • a defined surface pressure for example, 200 N / cm 2
  • thermoforming method only to the periphery of the laminated member. This is advantageous, for example, in cases in which already during the production of the lower layer, a convexly curved upper surface, which is customary for a rear window, has already been realized. It is also conceivable to form said convexly curved surface within the thermoforming process.
  • the laminating joints resulting from the lamination are sealed between the individual layers, for example by applying a sealant.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Laminated Bodies (AREA)

Abstract

L'invention concerne un élément transparent surfacique et à plusieurs couches, à utiliser de préférence comme vitre dans un véhicule, comprenant au moins une couche supérieure et une couche inférieure d'un matériau transparent qui sont assemblées entre elles. Chacune des couches présente une région de bord respective avec une face frontale, et au moins la région de bord de la couche supérieure est recourbée au moins sectoriellement en direction de la couche inférieure.
EP07818893A 2006-10-20 2007-10-10 Élément transparent à plusieurs couches Withdrawn EP2094485A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200610049621 DE102006049621A1 (de) 2006-10-20 2006-10-20 Transparentes, mehrlagiges Bauteil
PCT/EP2007/008822 WO2008046547A1 (fr) 2006-10-20 2007-10-10 Élément transparent à plusieurs couches

Publications (1)

Publication Number Publication Date
EP2094485A1 true EP2094485A1 (fr) 2009-09-02

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EP07818893A Withdrawn EP2094485A1 (fr) 2006-10-20 2007-10-10 Élément transparent à plusieurs couches

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EP (1) EP2094485A1 (fr)
DE (1) DE102006049621A1 (fr)
WO (1) WO2008046547A1 (fr)

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DE102008034041B4 (de) * 2008-07-22 2011-11-10 Krd Sicherheitstechnik Gmbh Kunststoff-Verbundscheibe für insbesondere die Fahrzeugverscheibung
EP2199053A1 (fr) 2008-12-19 2010-06-23 ArvinMeritor GmbH Elément de toit pour véhicules ainsi que procédé de fabrication d'un élément de toit plat pour véhicules
FR2947763B1 (fr) * 2009-07-10 2011-10-14 Peugeot Citroen Automobiles Sa Porte de vehicule automobile comportant un panneau de vitrage depourvu de cadre, ce panneau etant en matiere plastique transparente
JP5597644B2 (ja) * 2009-10-20 2014-10-01 帝人株式会社 高品位な意匠面を有する湾曲部材の製造方法および該方法から製造された部材
CN107584750B (zh) * 2017-08-16 2021-03-05 柳州申通汽车科技有限公司 一种汽车隔音膜片的热压工艺
DE102018132395A1 (de) * 2018-12-17 2020-06-18 Bayerische Motoren Werke Aktiengesellschaft Verfahren zur Herstellung einer Flächenheizung für einen Teilbereich eines Fahrzeugs

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DE102006049621A1 (de) 2008-04-24
WO2008046547A1 (fr) 2008-04-24

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