DE202004015925U1 - Layer system used in the production of a cooking hob, a front pane for ovens and a top for household appliances comprises a substrate with a transparent or translucent material and a metallic layer - Google Patents

Abstract

Layer system comprises a substrate (1) with a transparent or translucent material, especially glass, glass-ceramic and/or plastic and a metallic layer consisting of a support layer (2) containing metal particles.

Description

description the invention

The The invention relates to a decorative layer system which is a glass, a Glass ceramic or a transparent plastic, a metallic Appearance.

background the invention

such Decorative layer systems find particular use as decorative trim in the household sector, among other things for decoration or ornamentation a windshield of a household appliance, such as a cooktop, Oven, refrigerator or washing machine.

in the Use of such decorative layer systems is in addition to the qualitative Properties, such as longevity, temperature resistance, Scratch resistance, chemical resistance or ease of cleaning, more and more emphasis on a high quality Appearance. At the same time, such a decorative layer system but also inexpensive to be produced in mass production.

there the market is subject to fashionable fluctuations. Currently required the market Decorative layer systems with a metallic look. Under one metallic appearance is a metallic-looking or metallic understanding decoration.

Around to produce such metallic appearances or metallic effects, it is known, for example, about a stamping technique made stainless steel or aluminum blanks Apply by gluing to the front or back of a decorative panel. To create different metallic effects, the Metal parts have a directional or non-directional structure.

For example, this describes the EP 1 178 263 A2 the application of metal foils or metal sheets by means of a double-sided adhesive tape on the front or front side of a glass door of a household stove.

The Production and the application of such metallic appearances represents a considerable effort in terms of time and material. In addition, that must through the sheet occurring additional weight constructively balanced become. Through the sheets also arise on the decorative panels Openings or joints in which dirt accumulates easily can and are difficult to clean. In addition, the user can with his clothes on protruding Stuck edges or corners.

To avoid the mentioned disadvantages describe the DE 101 22 093 A1 and the DE 102 21 947 producing a multilayer structure of ceramic, organic and metallic layers on the front or back side of a support made of a transparent, glass, glass ceramic or plastic. In this case, a metal coating by means of a PVD process or by sputtering, so-called sputtering applied. However, these represent time-consuming and costly procedures and also require a high expenditure on equipment, since such methods are feasible only in high-vacuum systems. Due to a limited deposition rate (order of magnitude of 0.01 μm / min to 0.1 μm / min) and a limited opening angle or a limited detection range of such a coating system, the above-mentioned methods are mainly used for layers having a thickness of 0.03 to 0 , 04 microns and a large area of about 50 cm * 60 cm in eg a door of a domestic oven, a considerable time and therefore cost.

general description the invention

In front Therefore, the present invention has for this reason Task posed, a decorative layer system, which is a metallic Has appearance or a metallic appearance, in particular a Decorative layer system for to provide a transparent material, glass, glass-ceramic or plastic, which avoids the above-mentioned disadvantages of the prior art.

Especially the decorative layer system is the use of expensive high-vacuum systems and instead in a standard industrial process be time, material and therefore inexpensive to manufacture. Advantageous is a production in the mass or

assembly line production with in the home appliance industry usual Standard procedure.

In front In addition, large-scale decorative layer systems should also be used be easy to manufacture with a sufficient thickness.

simultaneously the creation of a decorative layer system or a metallic Appearance possible be that of their metallic impression or their metallic Appearance and its metallic effect with the one by means of PVD or Sputtern produced layer is comparable or even improved.

In addition, the decorative layer system to improved properties in terms of longevity (eg reduced metal abrasion), temperature resistance, scratch resistance, chemical resistance, susceptibility to soiling (eg fingerprints, food scraps) or ease of cleaning.

there in particular, the decorative layer system should be an intimate connection especially with the surfaces a glass or a glass ceramic can go.

Furthermore intended to be the decorative layer system with a wide and flexible selection produced by color combinations or metallic color effects be.

Is solved this task to surprisingly simple Way already by a layer system or a decorative layer system according to the claim 1. Advantageous embodiments are the subject of the respective subclaims.

According to the invention is a layer system and in particular a decorative layer system provided, which is a substrate consisting of a transparent or translucent material, in particular a glass, a glass ceramic or a transparent plastic and at least a first layer, which gives the coating system a metallic appearance, includes.

at this layer system comprises the first layer containing at least one metal particle carrier layer, which is especially organic.

The Metal particles act like small mirrors and reflect the incident Light and convey a surface on which it is applied are a metallic appearance and a metallic sheen.

Around a layer system with a glass substrate present a greater stability and at Break a greater security to ensure, For example, the substrate may also be present as a tempered glass.

The called carrier layer is on the front of the substrate or on the back of the substrate.

The backing comprises a highly viscous substance applied to the substrate, which in the consisting essentially of solid particles, present in accordance with the invention constructed as metal particles, binders, solvents and additives is and which has the property after drying or the Evaporation of the solvent or to adhere firmly to the substrate after polymerization and to connect with it intimately. Is particularly advantageous doing the adhesion and the connection with a surface of a Glass or glass ceramic substrate.

The Substance has a viscosity of 1000 cP to 3000 cP and more preferably from 1500 cP to 2500 cP (measured with a Brookfield rotational viscometer, spindle 7, 10rpm, 21 ° C) and is especially for the screen printing method described below suitable.

The Binder of the high-viscosity substance serves, inter alia, the viscosity adjust the substance and this to the application requirements adapt and contain in this case at least silicone and can in particular as a silicone resin available. A silicone is a substance that is next to typical organic Ingredients (carbon and hydrogen), including silicon and thus contains an inorganic component. The skeleton of such Silicon-organic compounds gives the present high-viscosity Substance special properties, including a temperature stability to about 250 ° C. The temperature stability of silicone or silicone resin is different from organic Resins.

Advantageous has the carrier layer while a temperature resistance of 150 ° C up to 250 ° C and preferably from 200 ° C up to 250 ° C on.

To owns the carrier layer a thickness of 0.001 mm to 1 mm, preferably 0.1 mm to 0.5 mm and more preferably from 0.1 mm to 0.3 mm.

By this temperature stability the named layer system or decorative layer system is particular suitable for use as a windscreen of a household appliance, for example a hob, oven, refrigerator, which thermal loads in the temperature range mentioned is exposed.

moreover can other additives in the solvent or the binder can be introduced to the properties for specific To change applications such as drying agents, catalysts, active organic Groups or thickeners. It can be, for example, by variation the volatile one Components or the polymer former the time course of drying or polymerizing influence.

The Drying or polymerizing can proceed independently or with the aid of a warming to about 50 ° C up to about 250 ° C and preferably from 100 ° C up to 200 ° C.

To produce a desired visual impression or optical effect For example, should the look of brushed metal be modeled, the oriented towards a viewer front or front side of a substrate or the side facing away from a viewer side or back may have a first structure. This first structure can be by additive or subtractive methods, in particular by etching, sandblasting, lapping, grinding, laser and / or vapor deposition, spraying or printing, introduced into or applied to the front or back.

The Metal particles in the highly viscous substance can thereby in the form of finely divided or coarse-grained Particles or in the form of small metallic flakes. From a certain particle size and a certain layer thickness can they reflect the entire incident light. To the coated Substrate to give an excellent metallic appearance the metal particles in this case a diameter of 1 .mu.m to 200 .mu.m preferred of 3 μm up to 100 μm and more preferably 5 μm up to 50 μm on.

The Metal particles have in the carrier layer forming high-viscosity Substance a percentage by weight of 0% to 30%, preferably from 0% to 20%, and more preferably from 0% to 10%.

To the Achieving different metal effects, the metal particles can at least made of aluminum, gold, silver, chrome, copper, tin, titanium, zinc, silicon or nickel formed. In addition, particles of different Metals in the carrier layer to be available. About that can out also be present in individual particles different metals. By their combination can be produced by metallic effects conventional Metal particles can not be achieved. The selection mentioned here on metals is to be understood as an example and is limited in no case to the said selection.

to Generating a big one Color variance may be the first layer in a particular embodiment also have organic or inorganic colorants. Under colorants are all colorants such as pigments or dyes to understand. Preference is given to the metal oxides. Important coloring components include, individually or in combination, the oxides of iron, Cobalt, copper, manganese, chromium, nickel, cadmium and vanadium or the white-clouding oxides of aluminum, calcium, silicon, zirconium, titanium, tin, antimony, Lead, zinc and manganese.

The The selection of colorants mentioned here is to be understood as an example and limited by no means to the named selection.

Further Color or gloss effects can also be achieved through the addition of pearlescent pigments, Soot, fluorescence or generate organic colored pigments.

The Generate possible with the present invention of different metallic effects with a large color variance or color or gloss effects is with a method of the prior art Technology only with considerable effort or even under some circumstances impossible.

One particular advantage of the present layer system according to the invention lies in it, that the first layer is applied by printing.

This avoids the hitherto compelling use of time and cost intensive High vacuum systems for applying a metallic layer by means the methods mentioned in the prior art, such as sputtering or PVD.

Advantageous has proved the screen printing process. The screenprint is a mechanical printing process in which the highly viscous substance by the permeable ones Pressed areas of a wire and is adhered to the lying under the screen object or substrate and after drying or evaporation of the solvent solid with the substrate connected is.

The Advantages of the method lie in its reproducibility, its continuous manufacturing capacity, its high clock rates and justified and made possible by its industrial maturity a time and therefore cost-effective production.

moreover the homogeneous distribution of the metal particles becomes by the mentioned procedure in highly viscous substance when applied to a substrate not changed.

Furthermore allows the screen printing process is a simple structured application of the first Layer. This implies that to Create a desired optical impression or optical effect, as already mentioned should, for example, the look of brushed metal modeled be a second structure, in particular a lateral structure, can be introduced into the first layer. There are accordingly one given pattern at the non-print areas, the stitches the sieve closed.

This second structure can also subsequently, in particular by etching, sandblasting, lapping, grinding, lasers vapor deposition, spraying and / or printing introduced into or applied to the front or back.

The Structuring of the layer system can only be done via the first or second structure or else a combination of the two and thus over a double structure done.

moreover Also, said first layer may not be patterned, i. evenly, be applied.

to Generation of a structure in the first layer is also the use a mask conceivable that differs in some of the coating methods mentioned deliberately placed over the area to be coated and thus prevents the coating of certain areas.

moreover can print over the mesh size of the sieve a desired one Structure are generated in the first layer.

In addition, with the mentioned printing method, a PVD or sputtering directly integrated into the manufacturing process and thus time- and cost-effective coating of large-area substrates with up to 10,000 cm ^{2 is} possible.

alternative For Siebdruckvefahren addition, the application or application of the first layer by means of other printing techniques, such as Flat printing, high pressure, gravure or other techniques such as Rolling, spraying, brushing, spraying, Stamping, printing or diving conceivable.

In an embodiment According to the present invention, the layer system may comprise a second layer, have, in particular as a ceramic layer or a organic layer is formed.

is the second layer is formed as a ceramic layer, so has they essentially have the properties of a ceramic paint. Their function includes essentially an optical function.

is the ceramic layer is applied directly to the substrate, so is the layer system after applying the ceramic layer to a Temperature of about 600 ° C up to about 650 ° C heated. The substrate or the substrate material melts in said Temperature range not. However, those in the ceramic layer contained glass particles melted on or in the substrate baked and form a solid bond with the substrate.

is the second layer is formed as an organic layer, so has they essentially have the properties of an organic color. The drying or polymerizing of the second layer can take place independently or with the aid of heating to about 50 ° C to about 250 ° C and preferably from 100 ° C up to 200 ° C.

The the second layer is opaque, depending on the requirement. opaque, transparent, i. transparent or translucent, i. formed through shimmering.

at an opaque layer is of a translucent but opaque Go out layer so that a Object or an object through the layer not or only as Shadow perceptible. In a transparent layer or a transparent substrate is an object through the layer or through the substrate completely from one positioned on the other side of the layer or substrate To recognize observers. By contrast, with a translucent layer an object through a layer or by a substrate not completely, but only dimly or in its contours from one to the other Side of the layer or the substrate positioned observer detect.

Possibly In addition, the second layer can take over the function of a protective layer and has in this regard one opposite the first layer higher mechanical strength, higher Chemical resistance or a higher thermal Resistance.

The second layer may additionally Have colorant. Possible Colorants include those already mentioned for the first layer Colorant.

outgoing from the first layer, the second layer is on the same or on the opposite side Side of the substrate arranged.

are the first layer and the second layer on the same side arranged, the second layer is on the first layer or arranged under the first layer. This is to understand that the second layer directly on the front of the substrate or on the back of the substrate can be arranged and the first layer on or is arranged above the second layer or that the first layer directly on the front of the substrate or on the back of the substrate may be arranged and the second layer on or is arranged above the first layer.

The second layer is also like the first layer by printing, in particular screen printing, applied.

The second layer can not be structured, i. evenly, or also structured to be applied. Also has the second layer a structure, this is characterized as a third structure. To generate the aforementioned third structure, see the description for making a second structure in the first layer. The there mentioned features also apply to the third structure.

The Structuring the layer system to produce an optical Effects can only be over the first, second or third structure, via a combination of two the structures mentioned, a Doppelstrukturiererung or also about one Combination of the three structures mentioned.

alternative For Siebdruckvefahren addition, the application or application of the second layer by means of other printing techniques, such as Flat printing, high pressure, gravure or other techniques such as Rolling, spraying, brushing, spraying, Stamping, printing or diving conceivable.

The second layer has a thickness of 0.001 mm to 1 mm, preferably 0.1 mm to 0.5 mm and more preferably from 0.1 mm to 0.3 mm on .

In a further embodiment the layer system has at least one third layer, in particular formed as a ceramic layer or an organic layer, on.

is while the third layer is formed as a ceramic layer, see it has the same features and method of application as the second layer, if this formed as a ceramic layer is.

is while the third layer is formed as an organic layer, so it has the same features and method of application as the second layer, when this is formed as an organic layer is.

The third layer is depending on the requirement opaque, transparent or formed translucent. Optionally, also the third layer take over the function of a protective layer and has in this regard across from the first layer higher mechanical strength, a higher chemical resistance or a higher one thermal resistance.

moreover is also the third layer by printing, especially screen printing, structured or not structured applied and has a Thickness of 0.001 mm to 1 mm, preferably 0.1 mm to 0.5 mm and especially preferably from 0.1 mm to 0.3 mm.

The called third layer is on the front or on the back of the substrate. You can do this directly on the surface of the Substrate on the front, directly on the surface of the Substrate at the back, be arranged on the first layer or on the second layer.

ever after which optical effect, which appearance or which property of the layer system are to be, the layers mentioned applied to the substrate in different order.

Around a firm bond between the layers and the layers to ensure with the substrate the entire layer system can still one after completion of the coating Temperature treatment by heating to about 100 ° C up to about 200 ° C be subjected.

In further embodiments of the invention of the layer system, the substrate is at least part of a pane, at least part of an auxiliary pane, at least part of a hob, in particular with reduced temperature load or at least Part of a temperature control unit and in particular part of a cooling, heating or cooking appliance.

The Invention furthermore a household appliance, in particular a control panel of a household appliance, which a layer system according to any one of claims. In addition, the invention comprises a hob, in particular a glass-ceramic cooktop or Hoptops, which a layer system according to one of the claims include. In the following includes the invention a disc, in particular an attachment disc or a front or inner pane for ovens, ovens or Microwave ovens, which a layer system according to any one of claims and further comprising a lid, in particular a lid of refrigerated, Heating or household appliances, comprising a layer system according to one of the claims.

The The present invention will now be described with reference to exemplary embodiments described in detail, the features of different embodiments can be combined with each other. Reference is made to the accompanying drawings taken. The same applies in the individual drawings Reference to the same parts.

The invention will be explained below with reference to the following embodiments who the.

1 shows an example of a schematic representation of a layer system.

2 - 8th show exemplary schematic representations of further embodiments of a layer system.

detailed Description of the invention

1 shows by way of example a schematic representation of a decorative layer system which consists of a substrate ( 1 ), a first layer and a second layer. The first layer comprises the carrier layer ( 2 ) and the second layer is an organic layer ( 3 ). The first layer, which gives the layer system the metallic appearance, is on the back of the substrate ( 1b ), ie on the side facing away from a viewer, and the second layer is arranged on the first layer. The second layer assumes a protective function for the first layer and is characterized by a higher mechanical strength, chemical or thermal resistance compared to the first layer or serves to produce a higher opacity in order to produce an opaque, ie non-transparent, decorative layer system. In this case, the second layer may be formed opaque by the addition of corresponding colorant. Since the first and the second layer on the back of the substrate ( 1b ) are left on the front side of the substrate ( 1a ) a smooth and therefore easy to clean surface.

2 shows by way of example a further decorative layer system, which likewise consists of a substrate ( 1 ), a first layer and a second layer. The first layer comprises the carrier layer ( 2 ) and the second layer a ceramic layer ( 4 ). However, the second layer on the front side, ie on the side oriented towards a viewer, of the substrate ( 1a ) and the layer system, the metallic appearance mediating first layer on the second layer. By the outside or exposed metallic first layer, the metallic appearance of the decorative layer system is promoted. In particular, the decorative layer system appears matt-metallic, ie non-shiny metallic. The second layer may be formed opaque by the addition of corresponding colorant. As a result, a non-transparent or opaque decorative layer system is produced.

3 shows a further decorative layer system, which is composed of a substrate, a first and a second layer. The first layer comprises the carrier layer ( 2 ) and the second layer is an organic layer ( 3 ). The first layer, which gives the layer system the metallic appearance, is on the front side of the substrate ( 1a ) and the second layer is disposed on top of the first layer. The second layer is transparent or translucent and gives the coating system the appearance of a shiny metal. If the second layer is still to assume a protective function for the first layer, it is distinguished in this case by the already mentioned features of a protective layer.

4 shows a further illustration of a decorative layer system, which is composed of a substrate, a first, a second and additionally a third layer. The layer system, the metallic appearance mediating first layer, the carrier layer ( 2 ), is on the back of the substrate ( 1b ) and as an organic layer ( 3 ) formed second layer is disposed on the first layer. The second layer in turn assumes a protective function for the first layer and with the features already mentioned. In order to produce a nontransparency of the decorative layer system, the second layer may also be formed opaque by the addition of corresponding colorant. The as a ceramic layer ( 4 ) formed third layer is on the other hand on the front side of the substrate ( 1a ) arranged. It is transparent or translucent and gives the decorative layer system different visual impressions, including the appearance of a shiny metal.

5 shows by way of example another decorative layer system constructed from a substrate, a first, a second and a third layer. All three layers are on the front of the substrate ( 1a ) arranged. It corresponds to the decorative layer system of 2 extended with an organic layer ( 3 ) formed third layer, which is arranged on the first layer. This is transparent or translucent and assumes a protective function for the first layer with the features already mentioned.

6 shows a further embodiment of the present invention, a decorative layer system comprising a substrate, a first, a second and a third layer. All three layers are on the back of the substrate ( 1b ) arranged. The second layer is a ceramic layer ( 4 ) and transparent or at least translucent. By the addition of colorants in the second layer can be used in combination with the metallic carrier layer ( 2 ) formed first layer different optical impressions are generated. The first layer is arranged on the second layer. The said third layer is an organic layer ( 3 ) and opaque. On the one hand, it takes over a protective function for the first shift and, on the other hand, protects the eyesight and prevents it Watching or observing through the decorative layer system. Because the three layers on the back of the substrate ( 1b ) are left on the front side of the substrate ( 1a ) a smooth easy-to-clean surface, while at the same time a variety of optical impressions can be generated over the three arranged on the back of the substrate layers.

7 shows the decorative layer system of 6 comprising a substrate having a three-layer coating. In order to produce a special optical impression, for example the impression of brushed metal, is additionally by a removal process on the back of the substrate ( 1b ) a first structure ( 5 ) or a pattern or introduced.

8th again shows the decorative layer system of 6 , In order to produce a further appealing visual impression, in addition to the first structure on the back side of the substrate ( 1b ) a second structure ( 6 ) or a pattern in the carrier layer ( 2 ), ie after deposition on the decorative layer system, up or introduced.

The in the 7 and 8th represented structures ( 5 . 6 ) or patterns, in particular the appearance and the geometry of the first and the second structure are to be understood as examples and are in no way limited to the selection shown.

It It will be apparent to those skilled in the art that those described above embodiments to be understood by way of example. The invention is not limited to these limited, but can be more diverse Way can be varied without departing from the spirit of the invention.

1

substratum

1a

front of the substrate

1b

back of the substrate

2

backing

3

organic layer

4

ceramic layer

5

first structure

6

second structure

Claims (41)

Layer system, in particular a decorative layer system comprising - a substrate with a preferably transparent or translucent material, in particular a glass, a glass ceramic and / or a plastic - and at least a first layer, which gives the coating system a metallic appearance, characterized in that the first layer comprises at least one metal particle-containing carrier layer. Layer system according to claim 1, characterized that the first layer an organic carrier layer includes. Layer system according to claim 1 or 2, characterized that the Metal particles have a diameter of 1 .mu.m to 200 .mu.m, preferably from 3 .mu.m to 100 .mu.m and especially preferably from 5 μm to 50 microns have. Layer system according to Claim 1, 2 or 3, characterized that the first layer comprises at least silicone. Layer system according to one of the preceding claims characterized in that first layer at least aluminum, gold, silver, chromium, copper, Tin, zinc, silicon, titanium and / or nickel. Layer system according to one of the preceding claims characterized in that first layer a temperature resistance of 150 ° C to 250 ° C and preferred from 200 ° C up to 250 ° C having. Layer system according to one of the preceding claims characterized in that first layer has colorant. Layer system according to one of the preceding claims characterized in that first layer by printing, in particular screen printing, structured or not structured is applied. Layer system according to one of the preceding claims characterized in that first layer has a thickness of 0.001 mm to 1 mm, preferably 0.1 mm to 0.5 mm and more preferably from 0.1 mm to 0.3 mm. Layer system according to one of the preceding claims characterized in that a surface of the substrate at least one first structure and / or the first layer has or have at least a second structure. Layer system according to claim 10, characterized that the first structure by additive and / or subtractive methods, in particular by etching, sandblasting, lapping, Grinding, lasering and / or vapor deposition, introduced and / or applied is or are. Layer system according to one of the preceding claims, characterized in that the layer system comprises a second layer, in particular a ceramic layer or an organic layer Layer comprising. Layer system according to claim 12, characterized that the second layer has colorant. Layer system according to one of claims 12 or 13 characterized in that starting from the first layer the second layer on the same or on the opposite Side of the substrate is arranged. Layer system according to one of claims 12 to 14 characterized in that the second layer on the first layer or under the first layer is arranged. Layer system according to one of claims 12 to 15 characterized in that the first layer on a back of the substrate and the second layer disposed on the first layer is. Layer system according to claim 16, characterized that the second layer opposite the first layer higher Having strength, chemical and / or thermal resistance. Layer system according to one of claims 12 to 15 characterized in that the second layer on a front side of the substrate and the first Layer is disposed on the second layer. Layer system according to claim 18, characterized that the second layer comprises an opaque layer. Layer system according to one of claims 12 to 15 characterized in that the first layer on the front of the substrate and the second layer is arranged on the first layer. Layer system according to one of claims 12 to 15 characterized in that the second layer on the back of the substrate and the first layer on the second layer is. Layer system according to claim 20 or 21, characterized that the second layer comprises a transparent or translucent layer. Layer system according to Claims 12 to 22, characterized that the second layer has a third structure. Layer system according to one of claims 12 to 23 characterized in that the second layer by printing, in particular screen printing, structured or not structured is applied. Layer system according to one of claims 12 to 24 characterized in that the second layer has a thickness of 0.001 mm to 1 mm, preferably 0.1 mm to 0.5 mm and more preferably from 0.1 mm to 0.3 mm. Layer system according to one of the preceding claims characterized in that the layer system a third layer, in particular a ceramic layer or a organic layer. Layer system according to claim 26, characterized that the third layer has colorant. Layer system according to claim 26 or 27, characterized that the third layer on the front or on the back of the substrate is arranged. Layer system according to one of claims 26 to 28 characterized in that the third layer directly on the front of the substrate, directly on the back side of the substrate, on the first layer or on the second layer is arranged. Layer system according to one of claims 26 to 29 characterized in that the third layer comprises an opaque layer. Layer system according to one of claims 26 to 30 characterized in that the third layer comprises a transparent or translucent layer. Layer system according to one of claims 26 to 31 characterized in that the third layer opposite the first layer higher strength, has chemical and / or thermal resistance. Layer system according to one of claims 26 to 32 characterized in that the third layer by printing, in particular screen printing, structured or not structured is applied. Layer system according to one of claims 26 to 33 characterized in that the third layer has a thickness of 0.001 mm to 1 mm, preferably 0.1 mm to 0.5 mm and more preferably from 0.1 mm to 0.3 mm. Layer system according to one of the preceding claims characterized in that Substrate is at least part of a disc. Layer system according to one of the preceding claims characterized in that Substrate is at least part of an attachment disc. Layer system according to one of the preceding claims characterized in that Substrate at least part of a hob, in particular with reduced Temperature load, is. Layer system according to one of the preceding claims 1 to 37 characterized in that the Substrate at least part of a temperature control, in particular part of a Cool-, Heating or cooking appliance, is. Hob, in particular glass ceramic hob or Hoptops, comprising a layer system according to one of the claims. Disc, in particular attachment disc for ovens, ovens or microwave ovens, comprising a layer system according to one of the claims. Lid, in particular cover of cooling, heating or household appliances, comprising a layer system according to one of the claims.