EP3849794A1

EP3849794A1 - Method for manufacturing a laminate which comprises electronic components and/or funtional units

Info

Publication number: EP3849794A1
Application number: EP19763000.7A
Authority: EP
Inventors: Georgios Tziovaras; Helge Kosthorst; Deivaraj Theivanayagam Chairman; Norbert HERMANNS; Heinz Pudleiner
Original assignee: Covestro Intellectual Property GmbH and Co KG
Current assignee: Covestro Deutschland AG
Priority date: 2018-09-14
Filing date: 2019-09-10
Publication date: 2021-07-21
Also published as: CN113056369A; WO2020053169A1; US20210339508A1; KR20210058823A; EP3623148A1

Abstract

The present invention relates to a laminate comprising at least one layer a) containing at least one thermoplastic and/or thermosetting plastic, at least one layer b) containing at least one thermoplastic polyurethane and at least one component and/or a functional unit (A) which is positioned on the at least one layer a), and wherein at least regions of the at least one thermoplastic polyurethane of layer b) are designed as a foam layer. The invention also relates to a method for manufacturing such a laminate and to the use of the laminate for manufacturing security documents, preferably identification documents, smart card smartphones, tablets, displays for smartphones, and/or displays for tablets.

Description

Method for producing a laminate, which comprises electronic components and / or functional units

The present invention relates to a laminate comprising at least one layer a) containing at least one thermoplastic and / or thermosetting plastic, at least one layer b) containing at least one thermoplastic polyurethane and at least one component and / or a functional unit (A) which is based on the at least one a layer a) is positioned, and wherein the at least one thermoplastic polyurethane of layer b) is formed at least in regions as a foam layer. Furthermore, the invention relates to a method for producing such a laminate and the use of the laminate for producing security documents, preferably identification documents and chip cards.

The installation of electronic components of all kinds in flat and flat structures is widespread and it is to be expected that in the future it will become increasingly important to install sensitive electronic components in particularly thin flat structures. Such electronic components can be contained in labels, mobile phones, smartwatches or in chip cards. Chip cards, also known as “smart cards”, are particularly worth mentioning. Such cards usually contain an electronic circuit board which is equipped with sensitive electronic components. These mostly sensitive electronic components must be adequately protected so that they are not damaged in daily use. With the decreasing thickness of the electronic components for various applications, common assembly technologies such as screwing, clipping the front and rear parts of the housing are becoming increasingly complex and expensive to manufacture. The lamination process, which is mainly used today in the production of smart cards and security documents, could also be used in the future to embed electronic components in other electronic devices. Such other electronic devices can be smartphones, displays, navigation devices, smart watches, game consoles and other items.

A common manufacturing process for embedding and protecting sensitive electronic components is pouring them into polyurethane or epoxy resins. The hardness, thickness and color of the system can be set as desired. However, it is disadvantageous that, particularly in the case of thin layers below 1 mm, the uniformity of the layer thickness and the surface quality are very complex or cannot be controlled.

WO-A 2006/101493 describes a complex method for embedding electronic components in thin layers of smart cards. Here the outside foils of a smart card are placed in a corresponding molded part, the electronic components are placed between the foils, the mold is closed and then a resin system is injected between the foils. This technology is complex, complicated and expensive, and completely new production facilities are required to produce such cards. The disadvantage of this method is that The usual lamination process for card production is not used here. Therefore, the inexpensive production of large quantities with this method is difficult.

Another process for the production of identity cards is the injection molding process, which is disclosed for example in WO-A 98/52731. In this way, compared to non-pressurized pouring, the layer thickness and surface quality can be defined and maintained. The disadvantage here is the high pressure and the temperature at which the liquid plastic flows over the electronic components. This makes this process unsuitable for embedding electronic components. DE-A 19921678 discloses a combination of injection molding processes with subsequent mechanical processing of the cards.

Another method for producing identification cards is the injection molding of thin housing parts which contain depressions which correspond to the structure of the electronic components to be embedded and is disclosed in DE-A 102007016779 and WO-A 2016/139114. The electronic components can then be inserted into these recesses. In the production of cards which comprise electronic components, corresponding openings are usually punched into the individual film layers before the individual layers are laminated, in which openings the electronic components find a place and are not destroyed during the lamination. This is disclosed in DE 43 43 206 Al.

A disadvantage of the methods described above is an additional assembly step to provide a suitable opening so that the electronic components can be introduced into the laminate or laminate. If no liquid adhesive is pre-cast, there is no full-surface connection of the electronic components with the individual layers and thus a reduced protective function of the electronic components.

WO-A 2012/084859 discloses the embedding of thin flat electronic components in a thermoplastic foam, a barrier film enclosing the foam layer and the electronic component. This barrier film is connected to the foam layer in some areas via a weld seam. The weld seam is characterized by high tightness and special mechanical stability. The weld seam is obtained by a pressure> 50 to <150 bar at a temperature of> 100 to <200 ° C.

The object of the present invention was to provide a laminate which contains a component and / or a functional unit, the functionality of this component and / or the functional unit not being impaired or even destroyed during the production of the laminate. Furthermore, it was an object of the present invention to provide a method for producing such laminates. Surprisingly, it was found that a laminate is comprehensive

at least one layer a) containing at least one thermoplastic and / or thermosetting plastic, preferably a thermoplastic, at least one layer b) containing at least one thermoplastic polyurethane, at least one component and / or a functional unit (A) on the at least one layer a) is positioned, and wherein the at least one thermoplastic polyurethane of layer b) is at least partially formed as a foam layer, solves this problem.

The laminate according to the invention is characterized in that the embedded component and / or functional unit (A) is largely protected against displacement and thus against damage during the lamination process. In addition, the component and / or the functional unit (A) is simply embedded in the laminate, so that these laminates can also be produced in large numbers. Furthermore, the laminate according to the invention is characterized by a flat, smooth surface.

In the context of this invention, laminate is understood to mean at least two superimposed layers, preferably plastic layers, particularly preferably thermoplastic and / or thermosetting plastic layers, very particularly preferably thermoplastic plastic layers. In particular, these layers can be provided in the form of plastic films, preferably in the form of thermoplastic and / or thermosetting plastic films, particularly preferably thermoplastic plastic films. These layers can be intimately bonded under the influence of pressure and temperature. Usually temperatures from> 80 ° C to <220 ° C, preferably from> 100 ° C to <200 ° C, very particularly preferably from> 110 ° C to <190 ° C and a pressure of> 2 N / cm ² to <400 N / cm ^{2 are} preferably used from> 5 N / cm ² to <350 N / cm ² , very particularly preferably from> 10 N / cm ² to <300 N / cm ² in the lamination process.

The laminate preferably has a thickness after the lamination process in a range from> 80 to <2000 pm, preferably from> 200 to <1500 pm, particularly preferably from> 350 to <1000 pm, very particularly preferably from> 400 to <800 pm . The laminate preferably has a length after the lamination process in a range from> 0.1 cm to <100 m, preferably from> 0.2 cm to <50 m, particularly preferably from> 1 cm to <1 m, very particularly preferably from > 5 cm to <50 cm. The laminate preferably has a width after the lamination process in a range from> 0.1 cm to <100 m, preferably from> 0.2 cm to <50 m, particularly preferably from> 1 cm to <1 m, very particularly preferably from > 5 cm to <50 cm.

The laminate preferably has an area, calculated from the length and width of the laminate, after the lamination process in a range from> 0.1 cm ² to <2000 m ² , preferably from> 1 cm ² to <1000 m ² , particularly preferably from> 5 cm ² to <100 mm ² , very particularly preferably from> 10 cm ² to <10 m ² , further preferably from> 20 cm ² to <1 m ² . The aspect ratio of length or width to thickness is preferably in a range from 10: 1 to 1000: 1, more preferably in a range from 20: 1 to 500: 1.

The difference in thickness between the thinnest point of the laminate compared to the thickest point of the laminate over the entire length and overall width of the laminate is preferably in a range from 1 to 150 μm, more preferably in a range from 2 to 80 mm, particularly preferably in a range from 5 to 70 pm.

The difference in thickness can be determined using a micrometer screw, which can preferably measure 0.1 pm as the smallest measuring unit. In order to reach measuring points that are far from the outer edges, the laminate can be cut near the measuring point and then measured with the micrometer screw.

The at least one component and / or functional unit (A) is preferably at least partially surrounded by the at least one layer b) or completely encased by the at least one layer b), preferably completely encased by the at least one layer b).

Enveloped means that the component and / or functional unit (A) is completely covered and / or surrounded by layer b).

Any number of components and / or functional units (A) can be contained in the laminate. It is also conceivable that sensors, chip cards, data storage media, batteries, lighting units and / or components and / or functional units (A) connected to one another can be used. The component and / or functional unit (A) can have thicknesses in the range from 20 pm to 1500 pm.

The at least one layer a) contains at least one thermoplastic and / or thermosetting plastic, preferably a thermoplastic. The thermoplastic of the at least one layer a) can preferably be at least one plastic selected from polymers of ethylenically unsaturated monomers and / or polycondensates of bifunctional reactive compounds and / or polyaddition products of bifunctional reactive compounds, or mixtures thereof. For certain applications it can be advantageous and therefore preferred to use at least one transparent thermoplastic. The thermosetting plastic can be at least one plastic selected from polymers of ethylenically unsaturated monomers and / or polycondensates of trifunctional reactive compounds and / or polyaddition products of trifunctional reactive compounds, or mixtures thereof. These are, for example, curable molding compounds, formaldehyde molding compounds, such as, for example, phenoplasts, phenol (PF), cresol (CF), resorcinol (RF), xylenol (XF) formaldehyde resins, aminoplasts such as urea (UF), melamine (MF), furan (FF) formaldehyde resins and other masses such as Prepregs, unsaturated polyester resins (UP), vinyl ester resins (VE), phenacrylate resins (PHA), epoxy resins (EP), diallyl phthalate resins and / or polydiallyl phthalate resins (PDAP), silicone resin (Si).

Particularly suitable thermoplastics of layer a) are polycarbonates or copolycarbonates based on diphenols, poly- or copolyacrylates and poly- or copolymethacrylates such as, for example and preferably, polymethyl methacrylate (PMMA), poly- or copolymers with styrene, for example and preferably polystyrene (PS) acrylonitrile -Butadiene-styrene (ABS) or polystyrene-acrylonitrile (SAN), thermoplastic polyurethanes, and polyolefins, such as, for example and preferably, polypropylene types or polyolefins based on cyclic olefins (for example TOPAS ™), poly- or copolycondensates of an aromatic dicarboxylic acid and aliphatic, cycloalophatic and / or araliphatic diols with 2 to 16 carbon atoms, such as, for example and preferably, poly- or copolycondensates of terephthalic acid, particularly preferably poly- or copolyethylene terephthalate (PET or CoPET), glycol-modified PET (PETG), glycol-modified poly- or copolycyclohexanedimethylene terephthalate halate (PCTG) or poly or copolybutylene terephthalate (PBT or CoPBT), preferably poly- or copolycondensates of naphthalenedicarboxylic acid, particularly preferably polyethylene glycol naphthalate (PEN), poly- or copolycondensate (s) of at least one cycloalkyldicarboxylic acid, such as, by way of example and by way of preference, polycyclohexanedimicarboxylic acid (polycyclohexanedimicarboxylic acid) (PCU) (PSU),

Polyvinyl halides, for example and preferably polyvinyl chloride (PVC), or their mixtures or blends of at least two of the aforementioned, particularly preferably one or more polycarbonates or copolycarbonates based on diphenols, poly- or copoly (meth) acrylates, poly- or copolycondensates of terephthalic acid or their mixtures or blends of at least two of the aforementioned.

Particularly preferred thermoplastics are one or more polycarbonate (s) or copolycarbonate (s) based on diphenols or blends containing at least one polycarbonate or copolycarbonate. Blends containing at least one polycarbonate or copolycarbonate and at least one poly- or copolycondensate of terephthalic acid, naphthalenedicarboxylic acid or a cycloalkyldicarboxylic acid, preferably cyclohexanedicarboxylic acid, are very particularly preferred. Polycarbonates or copolycarbonates are particularly preferred, in particular with average molecular weights Mw of 500 to 100,000 from 10,000 to 80,000, particularly preferably from 15,000 to 40,000, or their blends with at least one poly or copolycondensate of terephthalic acid with average molecular weights Mw of 10,000 to 200,000, preferably from 21,000 to 120,000. In preferred embodiments of the invention, polyalkylene terephthalates are suitable as poly- or copolycondensates of terephthalic acid. Suitable polyalkylene terephthalates are, for example, reaction products made from aromatic dicarboxylic acids or their reactive derivatives (e.g. dimethyl esters or anhydrides) and aliphatic, cycloaliphatic or araliphatic diols and mixtures of these reaction products.

Preferred polyalkylene terephthalates can be prepared from terephthalic acid (or its reactive derivatives) and aliphatic or cycloaliphatic diols with 2 to 10 carbon atoms by known methods (Kunststoff-Handbuch, Vol. VIII, pp. 695 ff, Karl-Hanser-Verlag, Munich 1973) ).

Preferred polyalkylene terephthalates contain at least 80 mol%, preferably 90 mol% of terephthalic acid residues, based on the dicarboxylic acid component, and at least 80 mol%, preferably at least 90 mol%, of ethylene glycol and / or 1,4-butanediol and / or 1, 4- Cyclohexanedimethanol residues, based on the diol component.

In addition to terephthalic acid residues, the preferred polyalkylene terephthalates can contain up to 20 mol% residues of other aromatic dicarboxylic acids with 8 to 14 carbon atoms or aliphatic dicarboxylic acids with 4 to 12 carbon atoms, such as residues of phthalic acid, isophthalic acid, naphthalene-2,6-dicarboxylic acid , 4,4'-diphenyldicarboxylic acid, succinic, adipic, sebacic acid, azelaic acid, cyclohexanediacetic acid.

The preferred polyalkylene terephthalates can contain, in addition to ethylene or 1,4-butanediol, 4-glycol residues, up to 80 mol% of other aliphatic diols having 3 to 12 carbon atoms or cycloaliphatic diols having 6 to 21 carbon atoms, e.g. B. residues of 1,3-propanediol, 2-ethyl-1,3-propanediol, 3, neopentyl glycol, 1,5-pentanediol, 1,6-hexanediol, 1,4-cyclohexane-dimethanol, 3-methyl-2,4-pentanediol, 2-methylpentanediol-2,4, 2,2,4-trimethylpentanediol-1, 3 and 2-ethylhexanediol-1, 6, 2,2-diethylpropanediol-1,3, hexanediol-2,5, 1,4-di- ([beta] -hydroxyethoxy) benzene, 2,2-bis (4-hydroxycyclohexyl) propane, 2,4-dihydroxy-l, l, 3,3-tetramethyl-cyclobutane, 2,2-bis- (3rd - [beta] - hydroxyethoxyphenyl) propane and 2,2-bis (4-hydroxypropoxyphenyl) propane (cf. DE-OS 24 07 674, 24 07 776, 27 15 932).

The polyalkylene terephthalates can by incorporating relatively small amounts of 3- or 4-valent alcohols or 3- or 4-basic carboxylic acids, such as z. B. are described in DE-OS 19 00 270 and US-PS 3,692,744, branched. Examples of preferred branching agents are trimesic acid, trimellitic acid, trimethylolethane and propane and pentaerythritol.

Preferably no more than 1 mole percent of the branching agent, based on the acid component, is used. Particularly preferred are polyalkylene terephthalates which have been prepared solely from terephthalic acid and its reactive derivatives (e.g. its dialkyl esters) and ethylene glycol and / or 1,4-butanediol and / or 1,4-cyclohexanedimethanol residues, and mixtures of these polyalkylene terephthalates.

Preferred polyalkylene terephthalates are also copolyesters which are prepared from at least two of the abovementioned acid components and / or from at least two of the abovementioned alcohol components, particularly preferred copolyesters are poly (ethylene glycol / butanediol-1,4) terephthalates.

The polyalkylene terephthalates preferably used as a component preferably have an intrinsic viscosity of approximately 0.4 to 1.5 dl / g, preferably 0.5 to 1.3 dl / g, each measured in phenol / o-dichlorobenzene (1: 1 wt . Parts) at 25 ° C.

In particularly preferred embodiments of the invention, the blend of at least one polycarbonate or copolycarbonate with at least one poly- or copolycondensate of terephthalic acid is a blend of at least one polycarbonate or copolycarbonate with poly- or copolybutylene terephthalate or glycol-modified poly- or copolycyclohexanedimethylene terephthalate. Such a blend of polycarbonate or copolycarbonate with poly- or copolybutylene terephthalate or glycol-modified poly- or copolycyclohexanedimethylene terephthalate can preferably be one with 1 to 90% by weight polycarbonate or copolycarbonate and 99 to 10% by weight poly- or Copolybutylene terephthalate or glycol-modified poly- or copolycyclohexanedimethylene terephthalate, preferably with 1 to 90% by weight of polycarbonate and 99 to 10% by weight of polybutylene terephthalate or glycol-modified polycyclohexanedimethylene terephthalate, the proportions adding up to 100% by weight. Such a blend of polycarbonate or copolycarbonate with poly- or copolybutylene terephthalate or glycol-modified poly- or copolycyclohexanedimethylene terephthalate can particularly preferably be one with 20 to 85% by weight polycarbonate or copolycarbonate and 80 to 15% by weight poly- or copolybutylene terephthalate or glycol-modified poly- or copolycyclohexanedimethylene terephthalate, preferably with 20 to 85% by weight of polycarbonate and 80 to 15% by weight of polybutylene terephthalate or glycol-modified polycyclohexanedimethylene terephthalate, the proportions adding up to 100% by weight. Such a blend of polycarbonate or copolycarbonate with poly- or copolybutylene terephthalate or glycol-modified poly- or copolycyclohexanedimethylene terephthalate may very particularly preferably be one with 35 to 80% by weight polycarbonate or copolycarbonate and 65 to 20% by weight poly - or copolybutylene terephthalate or glycol-modified poly- or copolycyclohexanedimethylene terephthalate, preferably with 35 to 80% by weight of polycarbonate and 65 to 20% by weight of polybutylene terephthalate or glycol-modified Act polycyclohexane dimethylene terephthalate, the proportions add up to 100 wt .-%. In particularly preferred embodiments, blends of polycarbonate and glycol-modified polycyclohexanedimethylene terephthalate in the above-mentioned compositions can be involved.

Aromatic polycarbonates or copolycarbonates are particularly suitable as polycarbonates or copolycarbonates in preferred embodiments.

The polycarbonates or copolycarbonates can be linear or branched in a known manner.

These polycarbonates can be prepared in a known manner from diphenols, carbonic acid derivatives, optionally chain terminators and optionally branching agents. Details of the production of polycarbonates have been laid down in many patents for about 40 years. Examples include Schnell, "Chemistry and Physics of Polycarbonates", Polymer Reviews, Volume 9, Interscience Publishers, New York, London, Sydney 1964, D. Freitag, U. Grigo, PR Müller, H. Nouvertne ', BAYER AG, "Polycarbonates" in Encyclopedia of Polymer Science and Engineering, Volume 11, Second Edition, 1988, pages 648-718 and finally on Dres. U. Grigo, K. Kirchner and PR Müller "Polycarbonate" in Becker / Braun, Kunststoff- Manual, Volume 3/1, Polycarbonate, Polyacetale, Polyester, Celluloseester, Carl Hanser Verlag Munich, Vienna 1992, pages 117-299.

Suitable diphenols can be, for example, dihydroxyaryl compounds of the general formula (I)

HO-Z-OH (I) wherein Z is an aromatic radical having 6 to 34 carbon atoms, which may contain one or more optionally substituted aromatic nuclei and aliphatic or cycloaliphatic radicals or alkylaryls or heteroatoms as bridging elements.

Examples of suitable dihydroxyaryl compounds are: dihydroxybenzenes, dihydroxydiphenyls, bis (hydroxyphenyl) alkanes, bis (hydroxyphenyl) cycloalkanes, bis (hydroxyphenyl) aryls, bis (hydroxyphenyl) ethers, bis (hydroxyphenyl) ketones, Bis (hydroxyphenyl) sulfides, bis (hydroxyphenyl) sulfones, bis (hydroxyphenyl) sulfoxides, l, l'-bis (hydroxyphenyl) diisopropylbenzenes, and their core alkylated and nuclear halogenated compounds.

These and other suitable other dihydroxyaryl compounds are described, for example, in DE-A 3 832 396, FR-A 1 561 518, in H. Schnell, Chemistry and Physics of Polycarbonates, Interscience Publishers, New York 1964, p. 28 ff .; P.102 ff. And in DG Legrand, JT Bendler, Handbook of Polycarbonate Science and Technology, Marcel Dekker New York 2000, p. 72 ff. Preferred dihydroxyaryl compounds are, for example, resorcinol, 4,4'-dihydroxydiphenyl, bis (4-hydroxyphenyl) methane, bis (3,5-dimethyl-4-hydroxyphenyl) methane, bis (4-hydroxyphenyl) diphenyl methane , 1,1-bis (4-hydroxyphenyl) -1-phenylethane, 1,1-bis (4-hydroxyphenyl) -1 - (1-naphthyl) -ethane, 1,1-bis (4- hydroxyphenyl) -1 - (2-naphthyl) ethane, 2,2-bis (4-hydroxyphenyl) propane, 2,2-bis (3-methyl-4-hydroxyphenyl) propane, 2,2-bis - (3,5-dimethyl-4-hydroxyphenyl) propane, 2,2-

Bis- (4-hydroxyphenyl) -l-phenyl-propane, 2,2-bis- (4-hydroxyphenyl) -hexafluoropropane, 2,4-bis- (4-hydroxyphenyl) -2-methyl-butane, 2, 4-bis- (3,5-dimethyl-4-hydroxyphenyl) -2-methylbutane, 1,1-bis- (4-hydroxyphenyl) -cy clohexane, 1,1-bis (3,5-dimethyl-4- hydroxyphenyl) cyclohexane, 1,1-bis (4-hydroxyphenyl) -4-methyl-cyclohexane, 1,3-bis- [2- (4-hydroxyphenyl) -2-propyl] benzene, 1, G-bis - (4-hydroxyphenyl) -3-diisopropyl-benzene, l, l'-bis (4-hydroxyphenyl) -4-diisopropyl-benzene, l, 3-bis- [2-

(3, 5-dimethyl-4-hydroxyphenyl) -2-propyl] benzene, bis (4-hydroxyphenyl) ether, bis (4-hydroxyphenylj sulfide, bis (4-hydroxyphenyl) sulfone, bis- (3,5-dimethyl-4-hydroxyphenyl) sulfone and 2,2 ', ^{3,3'-tetrahydro-3,3,3,} ^3, -tetramethyl- 1, 1'-spirobi- [lH-indene] -5,5'-diol or

Dihydroxydiphenylcycloalkanes of the formula (Ia)

wherein

R ¹ and R ² independently of one another are hydrogen, halogen, preferably chlorine or bromine, (V (V alkyl, Cs-C _o -cycloalkyl, C _o -cio-aryl, preferably phenyl, and C7-Ci2-aralkyl, preferably phenyl-Ci C4-alkyl, in particular benzyl, m is an integer from 4 to 7, preferably 4 or 5,

R ³ and R ^{4 can be} selected individually for each X, independently of one another hydrogen or ('i - (V alkyl and

X is carbon, with the proviso that at least one atom X, R ³ and R ⁴ mean alkyl at the same time.

In the formula (Ia), preference is given to alkyl on one or two atoms (X), in particular only on one atom XR ³ and R ⁴ .

The preferred alkyl radical for the radicals R ³ and R ⁴ in formula (Ia) is methyl. The X atoms in the alpha position to the diphenyl-substituted C atom (Cl) are preferably not dialkyl-substituted, whereas the alkyl disubstitution in the beta position to Cl is preferred.

Particularly preferred dihydroxydiphenylcycloalkanes of the formulas (Ia) are those with 5 and 6 ring C atoms X in the cycloaliphatic radical (m = 4 or 5 in the formula (Ia)), for example the diphenols of the formulas (Ia-1) to

A very particularly preferred dihydroxydiphenylcycloalkane of the forms I (Ia) is l, l-bis- (4-hydroxyphenyl) -3,3,5-trimethylcyclohexane (formula (Ia-1) with R ¹ and R ² being H).

Such polycarbonates can be prepared according to EP-A 359 953 from dihydroxydiphenylcycloalkanes of the formula (Ia).

Particularly preferred dihydroxyaryl compounds are resorcinol, 4,4'-dihydroxydiphenyl, bis (4-hydroxyphenyl) diphenylmethane, 1,1-bis (4-hydroxyphenyl) -1-phenylethane, bis- (4-hydroxyphenyl) - 1 - (1-naphthyl) ethane, bis (4-hydroxyphenyl) - 1 - (2-naphthyl) ethane, 2,2-bis (4-hydroxyphenyl) propane, 2,2-bis (3rd , 5-dimethyl-4-hydroxyphenyl) propane, l, l-bis (4-hydroxyphenyl) cyclohexane, l, l-bis (3,5-dimethyl-4-hydroxyphenyl) cyclohexane, l, l- Bis- (4-hydroxyphenyl) -3,3,5-trimethyl-cyclohexane, l, l'-bis- (4-hydroxyphenyl) -3-diisopropyl-benzene and 1,1'-bis- (4-hydroxyphenyl) - 4-diisopropyl benzene.

Very particularly preferred dihydroxyaryl compounds are 4,4'-dihydroxydiphenyl and 2,2-bis (4-hy droxypheny 1) propane.

Both a dihydroxyaryl compound to form homopolycarbonates and various dihydroxyaryl compounds to form copolycarbonates can be used. Both one dihydroxyaryl compound of formula (I) or (Ia) can be used to form homopolycarbonates, and several dihydroxyaryl compounds of formula (I) and / or (Ia) can be used to form copolycarbonates. The various dihydroxyaryl compounds can be linked to one another both statistically and in blocks. In the case of copolycarbonates from dihydroxyaryl compounds of the formula (I) and (Ia), the molar ratio of dihydroxyaryl compounds of the formula (Ia) to the other dihydroxyaryl compounds of the formula (I) which may be used is preferably between 99 mol% (Ia) and 1 mol -% (I) and 2 mol% (Ia) to 98 mol% (I), preferably between 99 mol% (Ia) to 1 mol% (I) and 10 mol% (Ia) to 90 mol -% (I) and in particular between 99 mol% (Ia) to 1 mol% (I) and 30 mol% (Ia) to 70 mol% (I).

A very particularly preferred copolycarbonate can be made using l, l-bis (4-hydroxyphenyl) -3,3,5-trimethylcyclohexane and 2,2-bis (4-hydroxyphenyl) propane

Dihydroxyaryl compounds of formula (Ia) and (I) can be prepared.

Suitable carbonic acid derivatives can be, for example, diaryl carbonates of the general formula (II) wherein

R, R 'and R "independently of one another are the same or different for hydrogen, linear or branched Ci-C34-alkyl, C7-C34-alkylaryl or C6-C34-aryl, R can also mean -COO-R'", where R '"represents hydrogen, linear or branched Ci-C34-alkyl, C7-C34-alkylaryl or C6-C34-aryl.

Preferred diaryl carbonates are, for example, diphenyl carbonate, methylphenyl phenyl carbonate and di (methylphenyl) carbonate, 4-ethylphenyl phenyl carbonate, di (4-ethylphenyl) carbonate, 4-n-propylphenyl phenyl carbonate, di (4-n-propylphenyl) carbonate, 4-iso-propylphenyl phenyl carbonate, di- (4-iso-propylphenyl) carbonate, 4-n-butylphenyl phenyl carbonate, di- (4-n-butylphenyl ) carbonate, 4-iso-butylphenylphenyl carbonate, di- (4-iso-butylphenyl) carbonate, 4-tert-butylphenylphenyl carbonate, di- (4-tert-butylphenyl) carbonate, 4- n-pentylphenylphenyl carbonate, di- (4-n-pentylphenyl) carbonate, 4-n-hexylphenylphenyl carbonate, di- (4-n-hexylphenyl) carbonate, 4-iso-octylphenylphenyl- carbonate, di- (4-iso-octylphenyl) carbonate, 4-n-nonylphenyl-phenyl-carbonate, di- (4-n-nonylphenyl) -carbonate, 4-cyclohexylphenyl-phenyl-carbonate, di- (4-cyclohexylphenyl ) carbonate, 4- (1-methyl-1-phenylethyl) phenylphenyl carbonate, di- [4- (1-methyl-1-phenylethyl) phenyl] carbonate, biphenyl-4-yl-phenyl- carb onate, di- (biphenyl-4-yl) carbonate, 4- (1-naphthyl) phenylphenyl carbonate, 4- (2-naphthyl) phenylphenyl carbonate, di- [4- (l- naphthyl) phenyl] carbonate, di- [4- (2-naphthyl) phenyl] carbonate, 4-phenoxyphenyl phenyl carbonate, di (4-phenoxyphenyl) carbonate, 3-pentadecylphenyl phenyl carbonate, di - (3-pentadecylphenyl) carbonate, 4-tritylphenylphenyl carbonate, di (4-tritylphenyl) carbonate, methyl salicylate phenyl carbonate, di (methyl salicylate) carbonate, ethyl salicylate phenyl carbonate, di ( ethyl salicylate) carbonate, n-propyl salicylate phenyl carbonate, di (n-propyl salicylate) carbonate, iso-propyl salicylate phenyl carbonate, di (isopropyl salicylate) carbonate, n-butyl salicylate phenyl carbonate, di - (n-butyl salicylate) carbonate, iso-butyl salicylate phenyl carbonate, di (iso-butyl salicylate) carbonate, tert-butyl salicylate phenyl carbonate, di (tert-butyl salicylate) carbonate, di (phenyl salicylate) carbonate and di (benzyl salicylate) carbonate.

Particularly preferred diaryl compounds are diphenyl carbonate, 4-tert-butylphenylphenyl carbonate, di- (4-tert-butylphenyl) carbonate, biphenyl-4-yl-phenyl carbonate, di- (biphenyl-4-yl) carbonate, 4- (1-methyl-1-phenylethyl) phenylphenyl carbonate, di- [4- (1-methyl-1-phenylethyl) phenyl] carbonate and di (methyl salicylate) carbonate. Diphenyl carbonate is very particularly preferred. Both a diaryl carbonate and various diaryl carbonates can be used.

To control or change the end groups, one or more monohydroxyaryl compounds can also be used as chain terminators, for example, which were not used to produce the diaryl carbonate (s) used. These can be those of the general formula (III)

in which

R ^{A stands} for linear or branched Ci-C34-alkyl, C7-C34-alkylaryl, C6-C34-aryl or for -COO-R ^D , whereby R ^{D stands} for hydrogen, linear or branched Ci-C34-alkyl, C7-C34 -Alkylaryl or (V is C34-aryl, and

R ^b , R ^C, independently of one another, are the same or different and represent hydrogen, linear or branched Ci-C34-alkyl, C7-C34-alkylaryl or C6-C34-aryl.

Such monohydroxyaryl compounds are, for example, 1-, 2- or 3-methylphenol, 2,4-dimethylphenol, 4-ethylphenol, 4-n-propylphenol, 4-iso-propylphenol, 4-n-butylphenol, 4-iso-butylphenol, 4-tert-butylphenol , 4-n-pentylphenol, 4-n-hexylphenol, 4-iso-octylphenol, 4-n-nonylphenol, 3-pentadecylphenol, 4-cyclohexylphenol, 4- (1-methyl-1-phenylethyl) -phenol, 4-phenylphenol , 4-phenoxyphenol, 4- (l-naphthyl) phenol, 4- (2-naphthyl) phenol, 4-tritylphenol, methyl salicylate, ethyl salicylate, n-propyl salicylate, iso-propyl salicylate, n-butyl salicylate, iso-

Butyl salicylate, tert-butyl salicylate, phenyl salicylate and benzyl salicylate.

4-tert-Butylphenol, 4-iso-octylphenol and 3-pentadecylphenol are preferred.

Suitable branching agents can be compounds with three or more functional groups, preferably those with three or more hydroxyl groups.

Suitable compounds with three or more phenolic hydroxyl groups are, for example, phloroglucin, 4,6-dimethyl-2,4,6-tri- (4-hydroxyphenyl) -hepten-2, 4,6-dimethyl-2,4,6-tri- (4-hydroxyphenyl) heptane, l, 3,5-tri- (4-hydroxyphenyl) benzene, l, l, l-tri- (4-hydroxyphenyl) ethane, tri- (4-hydroxyphenyl) phenylmethane, 2,2-bis (4,4-bis (4-hydroxyphenyl) cyclohexyl] propane, 2,4-bis (4-hydroxyphenyl isopropyl) phenol and tetra (4-hydroxyphenyl) methane. Other suitable compounds with three or more functional groups are, for example, 2,4-dihydroxybenzoic acid, trimesic acid (trichloride), cyanuric acid trichloride and 3,3-bis (3-methyl-4-hydroxyphenyl) -2-oxo-2,3-dihydroindole.

Preferred branching agents are 3,3-bis (3-methyl-4-hydroxyphenyl) -2-oxo-2,3-dihydroindole and 1,1,1-tri- (4-hydroxyphenyl) ethane.

The at least one layer b) containing at least one thermoplastic polyurethane is at least partially formed as a foam layer.

In principle, it is possible to foam all thermoplastic polyurethanes (TPU) by adding suitable blowing agents. Those TPUs which have a low hardness are preferably selected according to the invention. This minimizes the risk of damage to the electronic components during lamination. The preferably thermoplastic polyurethanes have a hardness of> 60 Shore A according to DIN ISO 7619-1 to <60 Shore D according to DIN ISO 7619-1, preferably from> 70 Shore A according to DIN ISO 7619-1 to <95 Shore A according to DIN ISO 7619-1, very particularly preferably from> 80 Shore A according to DIN ISO 7619-1 to <95 Shore A according to DIN ISO 7619-1.

The at least one layer b) preferably has a density of> 0.1 to <1.1 g / cm ³ , more preferably of> 0.2 to <0.9 g / cm ³ , preferably of> 0, before lamination, 3 to <0.8 g / cm ³ , particularly preferably from> 0.5 to <0.7 g / cm ³ . The pores in the at least one layer b) preferably have diameters between 10 and 500 μm, particularly preferably between 50 and 250 μm, before the lamination.

After the lamination, the foam structure in layer b) can completely disintegrate due to the compression pressure during the compression. The degree of compression up to the disintegration of the foam depends on the height of the components that are to be included in the foam layer. The height of the components is preferably not greater than the thickness of the foam layer before compression. This can ensure that the component does not protrude from the foam layer of the laminate after lamination and is therefore protected by a remaining part of the foam layer.

TPU are of great technical importance because of their good elastomer properties and thermoplastic processability. An overview of the manufacture, properties and applications of TPU is e.g. in the plastic manual [G. Becker, D. Braun], Volume 7 "Polyurethane", Munich, Vienna, Carl Hanser Verlag, 1983.

Depending on the organic diisocyanates used, TPUs can have an aliphatic or aromatic character. TPUs usually have a block or segment structure. A basic distinction is made between hard segments and soft segments. Hard segments are formed from the organic diisocyanates and short-chain compounds with two to three hydroxyl, amino, thiol or carboxyl groups used for the reaction, preferably compounds with two hydroxyl, amino, thiol or carboxyl groups, particularly preferably diols, with a medium Molecular weight from 60 to 500 g / mol. Soft segments are formed from the organic diisocyanates and long-chain compounds with two to three hydroxyl, amino, thiol or carboxyl groups used for the reaction, preferably compounds with two hydroxyl, amino, thiol or carboxyl groups, particularly preferably diols, with a medium Molecular weight of> 500 and <5000.

Hard segments contribute the strength and the upper usage temperatures to the TPU property profiles, soft segments contribute the elastic properties and the cold flexibility to the material properties of the TPU.

Aromatic, aliphatic, araliphatic, heterocyclic and cycloaliphatic diisocyanates or mixtures of these diisocyanates can be used as organic diisocyanates both for the hard segments and for the soft segments (cf. HOUBEN-WEYL "Methods of Organic Chemistry", Volume E20 "Macromolecular Substances", Georg Thieme Verlag, Stuttgart, New York 1987, pp. 1587-1593 or Justus Liebigs Annalen der Chemie, 562, pp. 75 to 136).

The following may be mentioned by way of example: aliphatic diisocyanates, such as hexamethylene diisocyanate, cycloaliphatic diisocyanates, such as isophorone diisocyanate, 1,4-cyclohexane diisocyanate, l-methyl-2,4-cyclohexane diisocyanate and l-methyl-2,6-cyclohexane diisocyanate, and also the corresponding isomer mixtures, 4,4'-dicyclohexylmethane diisocyanate, 2,4'-dicyclohexylmethane diisocyanate and 2,2'-dicyclohexylmethane diisocyanate and the corresponding isomer mixtures, aromatic diisocyanates, such as 2,4-tolylene diisocyanate, mixtures of 2, 4-tolylene diisocyanate and 2,6-tolylene diisocyanate, 4,4'-diphenylmethane diisocyanate, 2,4'-diphenylmethane diisocyanate and 2,2'-diphenylmethane diisocyanate, mixtures of 2,4'-diphenylmethane diisocyanate and 4,4'-diphenylmethane diisocyanate, urethane-modified liquid 4,4'-diphenylmethane diisocyanates and 2,4'-diphenylmethane diisocyanates, 4,4'-diisocyanatodiphenylethane (1,2) and 1,5-naphthylene diisocyanate. Preference is given to using 1,6-hexamethylene diisocyanate, isophorone diisocyanate, dicyclohexylmethane, 4,4'-diisocyanate, diphenylmethane diisocyanate isomer mixtures with a 4,4'-diphenylmethane diisocyanate content of> 96% by weight and in particular 4,4'-diphenylmethane diisocyanate and 1,5-naphthylene diisocyanate. The diisocyanates mentioned can be used individually or in the form of mixtures with one another. They can also be used together with up to 15% by weight (based on the total amount of diisocyanate) of a polyisocyanate, for example triphenylmethane-4,4 ', 4 "-triisocyanate or polyphenyl-polymethylene-polyisocyanates. Particularly preferred organic diisocyanates are, for example, 4,4'-diphenylmethane diisocyanate, hydrogenated 4,4'-diphenylmethane diisocyanate, 2,4-toluenediisocyanate and hexamethylene diisocyanate.

The preferred short-chain diols with a molecular weight of 60 to 500 g / mol are preferably aliphatic diols with 2 to 14 carbon atoms, for example ethanediol, 1,2-propanediol, 1,3-propanediol, 1,4-butanediol, 2,3-butanediol , 1,5-pentanediol, 1,6-hexanediol, diethylene glycol and dipropylene glycol. However, diesters of terephthalic acid with glycols having 2 to 4 carbon atoms, e.g. Terephthalic acid-bis-ethylene glycol or terephthalic acid-bis-l, 4-butanediol, hydroxyalkylene ether of hydroquinone, e.g. 1,4-Di (β-hydroxyethylj-hydroquinone, ethoxylated bisphenols, for example 1,4-di (β-hydroxyethyl) bisphenol A, (cyclo) aliphatic diamines, such as isophoronediamine, ethylenediamine, 1,2-propylenediamine, 1,3 - Propylenediamine, N-methyl-propylene-1,3-diamine, N, N'-dimethylethylenediamine and aromatic diamines, such as 2,4-toluenediamine, 2,6-toluenediamine, 3,5-diethyl-2,4-toluenediamine or

3,5-diethyl-2,6-toluenediamine or primary mono-, di-, tri- or tetraalkyl-substituted 4,4'-diaminodiphenylmethanes. Ethanediol, 1,2-propanediol, 1,3-propanediol, 1,4-butanediol, 1,6-hexanediol, ethylene glycol, diethylene glycol, 1,4-di (β-hydroxyethyl) hydroquinone or 1,4- are particularly preferred. Di (β-hydroxyethyl) bisphenol A used. Mixtures of the above-mentioned compounds can also be used. Smaller amounts of triplets can also be added.

The long-chain compounds with two to three hydroxyl, amino, thiol or carboxyl groups, preferably compounds with two hydroxyl, amino, thiol or carboxyl groups, particularly preferably diols, with a number average molecular weight of> 500 and <5000 can be in two Main groups are classified: polyether diols and polyester diols. The polyether diols are based, for example, on polytetrahydrofuran, polyethylene oxide and polypropylene oxide and mixtures thereof. The polyester diols are typically based on adipates, e.g. 1,4-butanediol adipate and

1,6-hexanediol adipate and caprolactone. Cocondensates are also possible.

Catalysts known and customary in the prior art can be used in the production of the TPU. These can be tertiary amines, such as, for example, triethylamine, dimethylcyclohexylamine, N-methylmorpholine, N, N'-dimethylpiperazine, 2- (dimethylamino-ethoxy) ethanol, diazabicyclo [2,2,2] octane and the like, and in particular organic metal compounds such as Titanic acid esters, iron compounds or tin compounds such as tin diacetate, tin dioctoate, tin dilaurate or the tin dialkyl salts of aliphatic carboxylic acids such as dibutyltin diacetate or dibutyltin dilaurate or the like. Preferred catalysts are organic metal compounds, especially titanium acid esters, iron and tin compounds. The total amount of catalysts in the TPU can generally be about 0 to 5% by weight, preferably 0 to 2% by weight, based on the total amount of TPU. Furthermore, the TPU auxiliaries and additives can contain up to a maximum of 20% by weight, based on the total amount of TPU. Typical auxiliaries and additives are pigments, dyes, flame retardants, stabilizers against the effects of aging and weather, plasticizers, lubricants and mold release agents, fungistatic and bacteriostatic substances as well as fillers and their mixtures.

Examples of further additives are lubricants, such as fatty acid esters, their metal soaps, fatty acid amides, fatty acid ester amides and silicone compounds, antiblocking agents, inhibitors, stabilizers against hydrolysis, light, heat and discoloration, flame retardants, dyes, pigments, inorganic and / or organic fillers, for example polycarbonates, and also Plasticizers and reinforcing agents. Reinforcing agents are in particular fibrous reinforcing materials such as e.g. inorganic fibers that are manufactured according to the state of the art and can also be supplied with a size. More detailed information on the auxiliaries and additives mentioned can be found in the specialist literature, for example the monograph by J.H. Saunders and K.C. Frisch "High Polymers", volume XVI, Polyurethane, part 1 and 2, publisher Interscience Publishers 1962 and 1964, the paperback for plastic additives by R.Gächter u. H. Müller (Hanser Verlag Munich 1990) or DE-A 29 01 774.

To produce the foam layer b) according to the invention, a blowing agent is added to the TPU, preferably a blowing agent which releases CO2 when heated and thus forms the foam layer. Suitable blowing agents are hydrogen carbonates, such as calcium hydrogen carbonate, potassium hydrogen carbonate and / or sodium hydrogen carbonate, and / or citrates, such as sodium citrate, potassium citrate, calcium citrate, magnesium citrate.

To produce the foam layer b), the granular TPU is usually mixed as a masterbatch which contains a blowing agent. This mixture is then compressed in an extruder, melted and homogenized. The temperatures of the melt in the extruder are above the decomposition temperature of the blowing agent and CO2 is released, which largely dissolves in the melt under the existing pressure. The melt is passed through an extrusion die, which is also referred to as a nozzle. Due to the pressure drop when it emerges from the nozzle, the CO2 dissolved in the melt is released and produces finely distributed bubbles. This foamed melt plume can be processed into a foamed film by further processing in the flat film or blown film process.

In both methods, further layers comprising at least one thermoplastic, preferably TPU, can be coextruded with or without blowing agent.

Suitable thermoplastic polyurethanes are available, for example, on the market under the trade names Desmopan ™, Elastollan ™, Pellethane ™, Estane ™, Morthane ™ or Texin ™. In one embodiment of the invention, the laminate comprises one or more further layers c) comprising at least one TPU with a total layer thickness of the one or more further layers c) of> 5 mih to <150 mih, preferably from> 10 mih to <120 mih, particularly preferably from> 15 mih to <110 mih and wherein the one or more further layers c) are arranged such that the layers form the immediate sequence a) c) b) or a) b) c). Layer c) is particularly preferably used in the form of a film.

In a preferred embodiment of the invention, one or more further layers c) comprising at least one TPU with a total layer thickness of the one or more further layers c) of> 5 mih to <150 mih, preferably from> 10 mih to <120 mih, is particularly preferred from> 15 mih to <110 mih arranged in such a way that the at least one component and / or functional unit (A) is at least partially covered by the one or more further layers c), that is to say the layers the immediate sequence a) c) b ) form.

To avoid repetitions, the TPUs described above also apply to the one or more further layers c) with the above-mentioned embodiments and preferred ranges.

In a further embodiment, the laminate comprises one or more further layers d) comprising at least one TPU with a total layer thickness of the one or more layers d) from> 5 mih to <150 mih, preferably from> 10 mih to <120 mih, particularly preferably from > 15 mih to <110 mih, and wherein these one or more further layers d) are arranged in the laminate in such a way that layer b) always lies between the at least one further layer d) and the at least one further layer c), the layers are preferably arranged in the immediate sequence a) c) b) d) or a) d) b) c).

In another embodiment of the invention, the one or more layers d) can be used in the form of a single or multi-layer film.

In a further embodiment, the TPU of the one or more further layers c) and / or the one or more further layers d) each have a hardness of> 60 Shore A according to DIN ISO 7619-1 to <60 Shore D according to DIN ISO 7619- 1, preferably from> 70 Shore A according to DIN ISO 7619-1 to <95 Shore A according to DIN ISO 7619-1, very particularly preferably from> 80 Shore A according to DIN ISO 7619-1 to <95 Shore A according to DIN ISO 7619- 1 on.

The at least one TPU of layer c) can be the same or different from the at least one TPU of layer d), preferably the at least one TPU of layer c) and layer d) are the same. To avoid repetitions, the thermoplastic described above, in particular the TPU described above, also apply to the one or more layers d) with the above-mentioned embodiments and preferred ranges.

In one embodiment of the invention, the at least one layer b) and the one or more layers c) in the form of a multilayer film b) c) are contained in the faminate, preferably a multilayer co-extruded film b) c).

In another embodiment, the at least one layer b), the one or more layers c) and the one or more layers d) in the form of a multilayer film c) b) d) are contained in the faminate, the one or more layers c) and d) enclosing the at least one layer b), preferably a multilayer co-extruded film c) b) d).

The thermoplastic polyurethanes of the one or more layers c) and / or the one or more layers d) which can be used according to the invention can be continuously used in the so-called extruder process, e.g. be produced in a multi-shaft extruder, or in the so-called belt process. The dosage of the above-described TPU, if necessary with the auxiliaries and additives described above, can be carried out simultaneously, i.e. in the one-shot process, or in succession, i.e. by a prepolymer process. The prepolymer process is particularly preferred. The prepolymer can be introduced either batchwise or continuously in part of the extruder or in a separate upstream prepolymer unit, e.g. a static mixer reactor, e.g. Sulzer mixers. Layers c) and d) can comprise the same or different TPU components described above, these TPU components are preferably the same.

The TPU layers c) and / or d) according to the invention of the faminate according to the invention can be produced by melting the TPU granules according to the invention in a melting extruder and using a nozzle to form a film in a thickness of> 5 pm to <150 pm, preferably from> 10 pm to <120 pm, particularly preferably from> 15 pm to <110 pm.

Layers b), c) and / or d) can be produced by the melt extrusion processes known to the person skilled in the art, the blow extrusion process and / or the cast extrusion process. For this purpose, the corresponding TPU granules of the individual layers described above are melted in a melting extruder and extruded through a nozzle to form a film in appropriate layer thicknesses.

In the Faminat according to the invention the layers b), optionally c) and optionally d) before the coating can have a total layer thickness of> 100 to <1200 pm, preferably of> 300 to <800 mih, particularly preferably from> 350 to <550 mih. In particular, the thickness of layer b) can be selected such that this layer b) completely envelops the component and / or the functional unit (A). After the lamination process, the laminate preferably has at least one, preferably two of the following properties: a. a thickness after lamination in a range from> 80 to <3000 mih, preferably from> 200 to <1500 mih, particularly preferably from> 350 to <1000 mih, very particularly preferably from> 400 to <800 mih;

b. a difference in thickness at the thinnest point of the laminate compared to the thickest point of the laminate over the entire length of the laminate, preferably in a range from 1 to 150 mih, more preferably in a range from 2 to 100 mih, particularly preferably in a range from 5 to 80 mih, most preferably from 10 to 70 mih; c. a difference in thickness at the thinnest point of the laminate compared to the thickest point of the laminate across the entire width of the laminate, preferably in a range from 1 to 150 mih, more preferably in a range from 2 to 100 mih, particularly preferably in a range from 5 to 80 mih, most preferably from 10 to 70 mih.

In particular, the thickness of the layer b) can be selected such that the layer b) in particular surrounds the component and / or the functional unit (A) on the sides which is not in contact with the layer a). In particular, the thickness of layer b) can be selected such that layer b) surrounds the component and / or the functional unit (A) on all sides in two spatial directions.

In a preferred embodiment of the laminate, the layer or the layers above the component or the functional unit (A) are transparent. This is preferably achieved in that the lamination of the layers, in particular the foam layer, is preferably compressed so strongly on the component and / or the functional unit (A) that the foam disintegrates and a transparent structure is produced. In this way, surface structures of the component or of the functional unit (A) can be made visible through the original foam layer, the foam of which has disintegrated.

The at least one TPU in layers b), c) and / or d) is preferably the same.

The laminate can contain one or more further layers e) of a thermoplastic and / or thermosetting plastic, preferably thermoplastic. As a thermoplastic and / or thermosetting plastic, reference is made to the materials, embodiments and preferred ranges mentioned under layer a).

These further layers e) can be placed on both sides of the laminate according to the invention described above. The following shift sequences can be possible: e) - a) - b)

a) - b) - e)

e) - a) - b) - e)

e) - a) - b) - c)

e) - a) -c) - b)

e) - a) - b) - c) - e)

e) - a) -c) - b) - e)

a) - b) -c) - e)

a) -c) - b) -e)

e) - a) - d) - b) - c)

e) - a) - c) - b) - d)

e) - a) - d) - b) - c) - e)

e) - a) - c) - b) - d) - e)

a) - d) - b) - c) - e)

a) - c) - b) - d) - e)

The invention further relates to a method for producing the laminate according to the invention, comprising the steps: i) providing a layer a) comprising at least one thermoplastic and / or thermosetting plastic, preferably a thermoplastic plastic,

ii) placing at least one component and / or functional unit (A) on the surface of layer a),

iii) placement of at least one layer b) containing at least one thermoplastic polyurethane and which is at least partially formed as a foam layer in such a way that the at least one component and / or a functional unit (A) is at least partially surrounded by it or completely by the at least one layer b) is encased, preferably completely encased,

iv) lamination of the layers from steps i) to iii) at a temperature of> 80 ° C. to <220 ° C., preferably from> 100 ° C. to <200 ° C., very particularly preferably from> 110 ° C. to <190 ° C and a pressure of> 2 N / cm ² to <400 N / cm ^2, preferably from> 5 N / cm ² to <350 N / cm ² , very particularly preferably from> 10 N / cm ² to <300 N / cm ² .

In a first embodiment of the process according to the invention, one or more further layers c), comprising at least one thermoplastic polyurethane with a total layer thickness of the one or more layers c) of> 5 pm to <150 pm, preferably from> 10 pm to <120 pm, particularly preferably from> 15 pm to <110 pm, placed in such a way that this one or several further layers c) are deposited either on the surface of the layer sequence before step iii) or after step iii), the layers are preferably arranged in the immediate sequence a) b) c) or a) c) b).

In a preferred embodiment of the first embodiment, layers b) and c) are used in the form of a two-layer film.

In a second embodiment of the process according to the invention, in addition to the further layer c), one or more further layers d) comprising at least one thermoplastic polyurethane with a total layer thickness of> 5 mm to <150 mm, preferably from> 10 ml to <120 ml, are particularly suitable preferably from> 15 mih to <110 mih, placed in such a way that there is always layer b) between the one or more further layers d) and the one or more further layers c), preferably the layers are in the immediate order a ) c) b) d) or a) d) b) c) arranged.

In a preferred embodiment of the second embodiment, layers b), c) and d) are used in the form of a multilayer film, layer b) being the middle layer of this multilayer film, preferably this multilayer film has the sequence c) b) d ) or d) b) c).

In a further embodiment of the method according to the invention, one or more further layers e) comprising at least one thermoplastic and / or thermosetting plastic, preferably thermoplastic, can be placed before step i) and / or after step iii) in such a way that these one or a plurality of further layers e) are deposited on at least part of the surface of the corresponding layers from steps i) and / or iii). A further layer e) can also be contained in the above first and / or second embodiments, as well as their preferred embodiments.

For the individual layers a), b), c), d) and / or e), reference is made to the materials, embodiments and arrangements described above.

The laminate according to the invention can be used in various applications, such as security documents, in particular identification cards, chip cards, also called “smart cards”. Furthermore, the laminates according to the invention can be used in everyday electronic goods. These are, for example, thin flat structures that house sensitive electronic components, such as labels with built-in near field communication (NFC) modules, particularly thin and flexible cell phones, smart watches, flexible displays, flexible solar modules, flexible batteries. The invention therefore furthermore relates to security documents, chip cards, smartphones, tablets, displays for smartphones and / or displays for tablets comprising at least one laminate according to the invention.

Examples

Example 1: Production of a thermoplastic multilayer foam film of layer sequence c) b) c)

A multilayer thermoplastic polyurethane film with a thickness of 600 pm was produced using the blown film process. The film consisted of three layers: the two outer lengths c) each made of 100 pm compact thermoplastic polyurethane and the 400 pm thick middle layer b) made of foamed thermoplastic polyurethane. A TPU based on polytetrahydrofuran (molecular weight 2000), 4,4'-methylenediphenylene diisocyanate and 1,4-butanediol as chain extender with a Shore A hardness 87, measured according to DIN ISO 7619-1, corresponding to a hardness of 36, was used as the thermoplastic polyurethane Shore-D measured according to DIN ISO 7619-1, a density of 1.12 g / cm ³ measured according to DIN EN ISO 1183-1A and a melt flow index (MFI) of 30 g / 10 min measured at 190 ° C / 21.6 kg (DIN ISO 1133) is used. For the foaming of the middle layer, 5% by weight Hydrocerol ™ CF20 from Clariant was used, which releases CO2 when heated in the extruder of the film and thus foams the TPU when it emerges from the nozzle. This foam sheet had a thickness of 600 pm.

Example 2: Production of the film stack for the laminate according to the invention

Figure 1 schematically shows the sequence of the layers of the film stack of Example 2. On a film made of Makroion ™ 3108 polycarbonate with a thickness of 100 pm (designated as a) in Figure 1, three high-temperature-resistant plastic components, each with a thickness of 100 pm, were placed at a distance of 30 mm (labeled as (A-3) in Figure 1), 200 pm (labeled as (A-2) in Figure 1) and 300 pm (labeled as (Al) in Figure 1). The 200 pm thick plastic component A- 2 can be composed of two layers of the 100 pm thick plastic component A-l, and accordingly the plastic component A-l can also be composed of three layers of the plastic component A-l.

The foam sheet from Example 1 (designated as b) in Figure 1 was placed over this polycarbonate sheet with the components A-1, A-2 and A-3.

Another polycarbonate Makroion ™ 3108 film with a thickness of 100 pm was placed over the foam film (designated as a in Figure 1). Example 3: Preparation of the laminate

The film stack from Example 2 was laminated on a lamination press from Bürkle with the following parameters:

Preheat the press to 175 ° C

Press for 3 minutes at a pressure of 50 N / cm ²

Cool the press to 38 ° C and open the press.

The laminate showed a homogeneous embedding of the components at all heights, 100 pm, 200 pm and 300 pm, without disturbances in the flow course, or without disturbances in the composition of the components A-1 and A-2, if these were composed of several plastic components. The foam was densified more directly above components A-1 and A-2. The surface of the laminate was flat, which means that no difference in thickness could be determined with the micrometer screw, which can measure 0.1 pm as the smallest measuring unit. In Figure 2, V means compressed foam.

Comparative Example 4:

A film stack was produced in accordance with Example 2, but the film in accordance with Example 1 (layer b) of FIG. 1) was replaced by a thermoplastic polyurethane film of 640 μm thickness produced by blown film extrusion. A thermoplastic polyurethane was a TPU based on polytetrahydrofuran (molecular weight 2000 g / mol), 4,4'-methylenediphenylene diisocyanate and 1,4-butanediol as a chain extender with a Shore A hardness 87, measured according to DIN ISO 7619-1, corresponding to a hardness of 36 Shore D measured according to DIN ISO 7619-1, a density measured according to DIN EN ISO 1183-1A of 1.12 g / cm ³ and a melt flow index (MFI) of 30 g / 10 min measured at 190 ° C / 21, 6 kg (according to DIN ISO 1133).

The film stack of Comparative Example 4 was laminated according to Example 3.

The laminate from comparative example 4 showed an inhomogeneous embedding of the components at all heights, 100, 200 and 300 pm with disturbances in the flow course, which was shown by a disturbance in the composition of the components A-2 and A-3 (schematic view in Figure 3) . The laminate of Comparative Example 4 showed no flat surface and furthermore cavities in the vicinity of the components A-1, A-2 and A-3 can be seen. In Figure 3, H means cavity

In a further comparative example 4, as shown in FIG. 4, the laminate was bulged at the points where the components Al, A-2 and A-3 were embedded, in comparison to the space between the components. The height difference of the laminate measured over the entire surface of the top was approximately 55 pm. The height difference of the laminate measured over the complete The surface of the underside of the laminate was also approx. The laminate therefore had a difference in thickness between its thinnest and its thickest point of approximately 107 mih.

Examples 3 and comparative example 4 clearly show that in the laminate according to the invention, the components could be embedded in the laminate without interference. Furthermore, the components were firmly connected in the laminate according to the invention without the components being damaged during the lamination process. The surface of the laminates according to the invention is flat, whereas the surface of the comparison laminate had a corrugated structure.

Reference numbers in Figures 1 to 3:

(Al) high-temperature-resistant plastic component with a thickness of 300 m ni (A-2) high-temperature-resistant plastic component with a thickness of 200 pm (A-3) high-temperature-resistant plastic component with a thickness of 100 pm a) film made of polycarbonate Makroion ™ 3108 with a thickness of 100 pm b) film from Example 1 or film from comparative example 4

H) cavity

V) Dense foam

Claims

1. Laminate comprising at least one layer a) containing at least one thermoplastic and / or thermosetting plastic,

at least one layer b) containing at least one thermoplastic polyurethane, at least one component and / or a functional unit (A) being positioned on the at least one layer a), and

wherein the at least one thermoplastic polyurethane of layer b) is at least partially formed as a foam layer.

2. Laminate according to claim 1, wherein the component and / or the functional unit (A) is at least partially surrounded by the at least one layer b), or is completely encased by the at least one layer b).

3. Laminate according to claim 1 or 2, wherein the at least one thermoplastic polyurethane of layer b) has a hardness of> 60 Shore A according to DIN ISO 7619-1 to <60 Shore D according to DIN ISO 7619-1.

4. Laminate according to claim 1 or 2, wherein one or more further layers c) comprising at least one thermoplastic polyurethane with a total layer thickness of the one or more layers c) of> 5 pm to <150 pm and wherein the one or more layers c) so it is arranged that the layers form the immediate sequence a) c) b) or a) b) c).

5. Laminate according to claim 4, wherein one or more further layers d) comprising at least one thermoplastic polyurethane with a total layer thickness of the one or more layers d) of> 5 pm to <150 pm is arranged in the laminate in such a way that between the at least a further layer d) and the at least one further layer c) is always layer b).

6. Laminate according to claim 4 to 5, wherein the at least one thermoplastic polyurethane of the one or more further layers c) and / or the one or more further layers d) each have a hardness of> 60 Shore A according to DIN ISO 7619-1 to < 60 Shore D according to DIN ISO 7619-run modes.

7. Laminate according to claim 1 to 5, wherein the at least one layer a) at least one thermoplastic selected from the group of one or more polycarbonate (s) or copolycarbonate (s) based on diphenols, poly- or copolyacrylates, poly- or Copolymethacrylate (s), poly- or copolymer (s) with styrene, acrylonitrile-butadiene-styrene, or polystyrene-acrylonitrile, thermoplastic polyurethane (s), polyolefin (s), poly- or copolycondensate (s) an aromatic dicarboxylic acid and aliphatic, cycloaliphatic and / or araliphatic diols with 2 to 16 carbon atoms, polyamide, poly- or copolycondensate (s) of at least one cycloalkyldicarboxylic acid, polysulfones, polyvinyl halides or their mixtures or blends of at least two of the aforementioned.

8. Laminate according to claims 1 to 7, wherein the layers b), optionally c) and optionally d) before the lamination have a total thickness of> 100 to <1200 pm and the laminate preferably has one of the following properties:

a. a thickness after lamination in a range from> 80 to <3000 pm, preferably from> 200 to <1500 pm, particularly preferably from> 350 to <1000 pm, very particularly preferably from> 400 to <800 pm;

b. a difference in thickness at the thinnest point of the laminate compared to the thickest point of the laminate over the entire length of the laminate, preferably in a range from 1 to 150 pm, more preferably in a range from 2 to 100 pm, particularly preferably in a range from 5 to 80 pm, very particularly preferably from 10 to 70 pm;

c. a difference in thickness at the thinnest point of the laminate compared to the thickest point of the laminate across the entire width of the laminate, preferably in a range from 1 to 150 pm, more preferably in a range from 2 to 100 pm, particularly preferably in a range from 5 to 80 pm, very particularly preferably from 10 to 70 pm.

9. A method for producing a laminate according to claims 1 to 8, comprising the steps i) providing a layer a) comprising at least one thermoplastic and / or thermosetting plastic,

iii) Placement of at least one layer b) containing at least one thermoplastic polyurethane and which is at least partially formed as a foam layer in such a way that the at least one component and / or a functional unit (A) is at least partially surrounded by it or completely by the at least one layer b) is enveloped,

iv) lamination of the layers from steps i) to iii) at a temperature of> 80 ° C. to <220 ° C. and a pressure of> 2 N / cm ² to <400 N / cm ² .

10. The method according to claim 9, wherein one or more further layers c) comprising at least one thermoplastic polyurethane with a total layer thickness of the one or more layers c) of> 5 pm to <150 pm is placed in such a way that this one or more further layers c) are deposited on the surface of the layer sequence either before step iii) or after step iii), the layers are preferably arranged in the immediate sequence a) b) c) or a) c) b).

11. The method according to claim 10, wherein one or more further layers d), comprising at least one thermoplastic polyurethane with a total layer thickness of the one or more layers c) of> 5 pm to <150 pm, is placed in such a way that between the one or several further layers d) and the one or more further layers c) is always layer b), the layers are preferably arranged in the immediate sequence a) c) b) d) or a) d) b) c).

12. The method according to claim 10, wherein the layers b) and c) are in the form of a multilayer thermoplastic polyurethane film and are placed accordingly in step iii), preferably the layers are in the immediate order a) b) c) or a) c) b) arranged.

13. The method according to claim 11, wherein the layers b), c) and d) are in the form of a multilayer thermoplastic polyurethane film and are placed accordingly in step iii), preferably the layers are in the immediate order a) c) b) d) or a) d) b) c) arranged.

14. The method according to claim 9 to 13, wherein one or more further layers e) comprising at least one thermoplastic and / or thermosetting plastic are placed before step i) and / or after step iii) in such a way that these one or more further layers e) are deposited on at least part of the surface of the corresponding layers from steps i) and / or iii).

15. Security documents, chip cards, smartphones, tablets, displays for smartphones and / or displays for tablets comprising at least one laminate according to one of claims 1 to 8.