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JP-7136764-B2 - Transfer film, method of manufacturing transfer film, method of using transfer film, and method of coating components

JP7136764B2JP 7136764 B2JP7136764 B2JP 7136764B2JP-7136764-B2

Inventors

  • ヘーン ローランド
  • ファルグナー シュテフェン

Assignees

  • レオンハード クルツ シュティフトゥング ウント コー． カーゲー
  • レオンハード クルツ シュティフトゥング ウント コー． カーゲー

Dates

Publication Date
20220913
Application Date
20170613
Priority Date
20160707

Claims (13)

  1. A transfer film (1) comprising a carrier film (11) and a transfer ply (15) separable from the carrier film, said transfer membrane is provided for transferring said transfer ply (15) to a component (5); A membrane (13) for deep drawing is disposed between the carrier film (11) and the transfer ply (15), A first separation layer (12) is arranged between said membrane (13) and said carrier film (11) and a second separation layer (14) is arranged between said membrane (13) and said transfer ply (15). ) is arranged, at least one of the first separation layer (12) and the second separation layer (14) comprises a varnish or wax crosslinked with a melamine-formaldehyde resin or consists of a varnish or wax crosslinked with a melamine-formaldehyde resin ; said membrane (13) is formed with a stretchability of 500% to over 1500% at a temperature in the range of 130°C to 160°C; said second separating layer (14) has a layer thickness of less than 1 μm, The separation force of the carrier film (11) from the membrane (13) by the first separation layer (12) disposed between the membrane (13) and the carrier film (11) is the 5 times the separation force of said membrane (13) from said transfer ply (15) by said second separation layer (14) disposed between said membrane (13) and said transfer ply (15). ~10 times smaller, Said second separating layer disposed between said membrane (13) and said transfer ply (15) ensures that the separating force of said membrane (13) is between two adjacent transfer layers (151-153). A transfer film (1) characterized by being 30% to 70% smaller than the adhesion force .
  2. the membrane (13) is formed as a varnish layer with a layer thickness in the range from 10 μm to 200 μm, and/or the membrane (13) is made of polyurethane and/or the membrane (13) is made transparent, translucent or opaque, and/or The membrane (13) has a decoration or motif and/or The membrane (13) is not formed over the entire surface, The membrane (13) is not formed in the edge region of the transfer film (1) and/or 2. Transfer membrane (1) according to claim 1, characterized in that in the edge region the membrane (13) has handling properties for peeling off the membrane (13).
  3. the membrane (13) is formed as a printed layer and/or the membrane (13) is formed from a plurality of layers and/or 3. Transfer membrane (1) according to claim 1 or 2, characterized in that the membrane (13) is formed as a homogeneous layer.
  4. said transfer ply (15) is formed as a multi-layer body formed from transfer layers (151-153), and/or The transfer ply (15) has a first transfer layer (151) facing the membrane (13) , a second transfer layer (152) and a third transfer layer (153) , The first transfer layer (151) is formed as a protective layer, The protective layer is formed as a protective varnish formed from a PMMA-based varnish with a layer thickness in the range of 2 μm to 50 μm, and/or The protective layer has a layer thickness in the range of 2 μm to 50 μm, and is formed as a protective varnish made of a PMMA (polymethyl methacrylate)-based varnish or a PVDF (polyvinylidene fluoride) and PMMA mixture-based varnish. A transfer film (1) according to any one of claims 1 to 3, characterized in that:
  5. The second transfer layer (152) is formed as a single or multiple decorative layer, The second transfer layer (152) is formed as a colored layer, A transfer film (1) according to claim 4, characterized in that said colored layer is formed from a PMMA-based varnish having a layer thickness in the range of 1 µm to 10 µm.
  6. The third transfer layer (153) is formed as a base coat layer, A transfer film (1) according to claim 4 or 5, characterized in that said base coat layer is formed to have a layer thickness in the range of 1 µm to 5 µm.
  7. Said first separating layer (12) and/or said second separating layer (14) is formed from Montan acid ester wax or polyethylene wax and/or said first separating layer (12) is a layer of less than 1 μm Transfer film (1) according to any of the preceding claims, characterized in that it has a thickness.
  8. 8. Transfer membrane (1) according to claim 7 , characterized in that the first separating layer (12) is made of polyethylene wax and the second separating layer (14) is made of montan acid ester wax . .
  9. A method of using the transfer film (1) according to any one of claims 1 to 8 using TOM , The TOM laminates a substrate (2), coats the backside of the substrate (2) with a TOM basecoat (16), and converts the laminated and coated substrate (2) into a three-dimensional component (5). including the step of applying The carrier film (11) of the transfer film (1) is peeled off before or after the coating on the substrate (2) and the membrane (13) is attached to the laminated and coated substrate (2). removed from the transfer ply (15) after application to the component (5); and/or Said TOM comprises applying said transfer membrane (1) to said component (5), Said carrier film (11) is stripped from said membrane (13) before applying said transfer film (1) to said component (5), said membrane (13) attaching said transfer film (1) to said component. A method characterized in that it is stripped from said transfer ply (15) after applying (5) .
  10. A method for producing a transfer film (1) according to any one of claims 1 to 8 , The transfer film (1) is disposed between a carrier film (11), a transfer ply (15) separable from the carrier film, and the carrier film (11) and the transfer ply (15). a membrane (13); said membrane (13) is manufactured or applied by a casting method or by screen printing, gravure printing, flexographic printing or inkjet printing , Said method is carried out using a TOM, said TOM laminating a substrate (2), coating the backside of said substrate (2) with a TOM base coat (16), and said laminated and coated substrate ( 2) to the three-dimensional component (5); The carrier film (11) of the transfer film (1) is peeled off before or after the coating on the substrate (2) and the membrane (13) is attached to the laminated and coated substrate (2). removed from the transfer ply (15) after application to the component (5); and/or Said method is carried out using a TOM, said TOM comprising applying said transfer membrane (1) to said component (5), Said carrier film (11) is stripped from said membrane (13) before applying said transfer film (1) to said component (5), said membrane (13) attaching said transfer film (1) to said component. A method characterized in that it is stripped from said transfer ply (15) after applying (5) .
  11. said membrane (13) is manufactured from multiple consecutive passes or multiple layers, To form the membrane (13), the applied layers are at least partially touch-dried before additional layers are applied to the applied layers to form the membrane (13). and/or characterized in that an additional layer is dried or allowed to dry completely before being applied to said applied layer to form said membrane (13). the method of.
  12. 12. According to claim 10 or 11, characterized in that for forming said membrane (13) a subsequent layer is applied so as to etch at least the surface of an already applied layer to form a uniform layer. described method.
  13. A component ( 5) a method of coating, Said method is carried out using a TOM, said TOM laminating a substrate (2), coating the backside of said substrate (2) with a TOM base coat (16), and said laminated and coated substrate ( 2) to said component (5); The carrier film (11) of the transfer film (1) is peeled off before or after the coating on the substrate (2) and the membrane (13) is attached to the laminated and coated substrate (2). removed from the transfer ply (15) after application to the component (5); and/or The method is performed using a TOM, the TOM comprising applying the transfer membrane (1) to the component (5), Said carrier film (11) is stripped from said membrane (13) before applying said transfer film (1) to said component (5), said membrane (13) attaching said transfer film (1) to said component. A method characterized in that it is stripped from said transfer ply (15) after applying (5) .

Description

The present invention relates to transfer membranes, methods of making transfer membranes, methods of using transfer membranes, and methods of coating components. Decorative films for decoration are known from the state of the art and different methods are used. The decorative film is formed as a transfer film comprising a carrier film and a transfer ply separable from the carrier film. In the case of the IMD method (=In-Mold Decoration), the transfer film is placed in an injection mold and back-injection-molded. The carrier film, especially when applied to the contour surface of the mold surface at high speed, absorbs the tensile forces occurring during the deformation of the transfer film due to the high pressure and high temperature that occur during injection molding, and the varnish layer protects the formed transfer ply from cracks and other damage during deformation. The surface finish of the transfer layer is determined by this carrier film. Thus, here the carrier film acts to assist the deformation of the transfer ply. Here, the three-dimensional deformation is determined by the relatively low modulus carrier film and is thus limited by it. In the case of insert molding, the transfer film is applied especially to smooth and flat substrates. After that, the carrier film is peeled off. During deep drawing of substrates coated with transfer plies present in the two mold parts of the deep drawing mold, the applied transfer plies must absorb tensile forces due to deformation. In particular, when a protective layer is formed, cracks or the like occur when the radius of curvature becomes narrow. In the so-called 3DHS method, a transfer film is placed on the already deformed part and hot-stamped. The transfer film is applied, in particular with vacuum suction and preheating, to the contours of the already deformed part before hot stamping, then shaped into a corresponding shape and hot stamped in a heated stamping die. As in the IMD method, the carrier film absorbs the tensile forces and protects the varnish layer to be transferred from cracks and other damage caused during deformation. In the case of the so-called TOM (=Three-dimensional Overlay Method), the transfer film is applied especially to smooth and planar substrates. After that, the carrier film is peeled off. Then, when a substrate coated with the transfer ply is subsequently placed over the existing deformation and the portion of the substrate located over the deformation is reshaped, the applied transfer ply is stretched by the deformation. power must be absorbed. In particular, when a protective layer is formed, cracks or the like occur when the radius of curvature becomes narrow. 1 is a diagram schematically showing a first embodiment of a transfer film of the present invention; FIG.2 schematically shows a first step for manufacturing an insert using the transfer membrane of FIG. 1; FIG.Figure 2 schematically shows a second step for manufacturing an insert using the transfer membrane of Figure 1;FIG. 2 schematically shows a process of forming a TOM laminated film using the transfer film of FIG. 1;5 schematically illustrates the coating of a component with the TOM film stack of FIG. 4; FIG.FIG. 5 is a diagram schematically showing a second embodiment of the transfer film of the present invention;Figure 7 schematically shows a first step of a TOM for coating a component with a transfer membrane as shown in Figure 6;Figure 2 schematically shows a second step of the TOM for coating the component with the transfer membrane shown in Figure 1; FIG. 1 shows a transfer film 1 comprising a carrier film 11 , a first separation layer 12 , a deep drawn membrane 13 , a second separation layer 14 and a transfer ply 15 comprising a plurality of transfer layers 151 , 152 , 153 . The embodiment shown in FIG. 1 will be described in detail. Carrier film 11 is formed as a PET film having a layer thickness in the range of 12 μm to 100 μm. The deep-drawn membrane 13 is formed as a varnish layer made of polyurethane with a layer thickness in the range from 10 μm to 200 μm, preferably in the range from 20 μm to 100 μm, more preferably in the range from 25 μm to 75 μm. Polyurethanes can be solvent-based or water-dispersed. Polyurethanes must have sufficient deformability and can be composed of different polymers. These include, for example, polyester polyols, polyether polyols, polycarbonate polyols, polyacrylate polyols, and polyurethanes composed of mixtures of these polymers. Polyurethanes composed of polyester polyols can preferably be used. These polymers form the base of the varnish in manufacturing the deep-drawn membrane 13 . In order to obtain sufficient layer thicknesses, these layers are preferably produced by means of casting methods, for example using a slit die, or screen printing, gravure printing, flexographic printing, inkjet printing. These manufacturing methods can be applied in one pass or in multiple successive passes. The first applied varnish l