EP4370334A1 - Structure de film appropriée pour une stratification rapide - Google Patents

Structure de film appropriée pour une stratification rapide

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Publication number
EP4370334A1
EP4370334A1 EP22747685.0A EP22747685A EP4370334A1 EP 4370334 A1 EP4370334 A1 EP 4370334A1 EP 22747685 A EP22747685 A EP 22747685A EP 4370334 A1 EP4370334 A1 EP 4370334A1
Authority
EP
European Patent Office
Prior art keywords
polymer
layer
range
polycarbonate
layers
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP22747685.0A
Other languages
German (de)
English (en)
Inventor
Heinz Pudleiner
Georgios Tziovaras
Wieland Hovestadt
Stefan Janke
Kira PLANKEN
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Covestro Deutschland AG
Original Assignee
Covestro Deutschland AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Covestro Deutschland AG filed Critical Covestro Deutschland AG
Publication of EP4370334A1 publication Critical patent/EP4370334A1/fr
Pending legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
    • B32B27/365—Layered products comprising a layer of synthetic resin comprising polyesters comprising polycarbonates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/02—Physical, chemical or physicochemical properties
    • B32B7/027—Thermal properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/05—5 or more layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/24—All layers being polymeric
    • B32B2250/244—All polymers belonging to those covered by group B32B27/36
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/40—Symmetrical or sandwich layers, e.g. ABA, ABCBA, ABCCBA
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2369/00—Polycarbonates

Definitions

  • the invention relates to a multilayer structure comprising at least five layers (S1) to (S5), the outer layers (S1) and (S5) independently of one another containing a polymer (PI) which has a Vicat softening point >149°C.
  • Multi-layer structures are primarily used in the field of security documents.
  • security documents in particular identification documents
  • Such security documents, in particular identification documents increasingly comprise polycarbonate.
  • Documents based on polycarbonate are particularly durable and have a high level of security against counterfeiting.
  • Popular security features are transparent areas in, for example, identification cards or data pages in passports. These transparent areas are also called “windows”. Holograms, security prints and other elements can be introduced into these windows, which can be recognized as original or counterfeit by inspection.
  • the function of the security feature is based on the high transparency of polycarbonate. If the transparency of the document in the window is impaired, then it may be a forgery.
  • a first subject matter of the invention relates to a multi-layer structure (MA), comprising
  • (S1) at least one first outer layer (S1) containing a polymer (PI) which has a Vicat softening point >149°C, preferably >160°C, more preferably >170°C; more preferably > 180°C, determined according to ISO 306:2004 (50N; 50°/h); (52) at least one further polymer layer (S2) which contains a polymer (P2) which has a Vicat softening point ⁇ 149° C., preferably 140° C., more preferably
  • At least one further polymer layer (S4) which contains a polymer (P2) which has a Vicat softening point ⁇ 149° C., preferably 140° C., more preferably
  • At least one second outer layer (S5) which contains a polymer (PI) which has a Vicat softening point >149°C, preferably >160°C, more preferably >170°C; more preferably > 180°C, determined according to ISO 306:2004 (50N; 50°/h).
  • PI polymer
  • the multi-layer structure (MA) solves the above-mentioned problem of high complexity in that, on the one hand, the choice of materials ensures that the adhesion of the layers to one another is sufficient so that they cannot easily be detached from one another, and at the same time a wide variety of security features , such as holograms, windows or laser printing can be built into a security document, for example.
  • the multi-layer structure (MA) is preferably a component of a security document or the security document itself, in particular the data page of a passport or an identity card or other ID cards.
  • the multilayer structure (MA) can additionally have the further polymer layer (S6).
  • the use of the further polymer layer (S6) can help to protect heat-sensitive layers that are in the multi-layer structure (MA) from excessively high temperatures during a lamination process.
  • All layers (S1) to (S6) are also referred to below as polymer layers (S1) to (S6) since they preferably contain or consist of polymers.
  • the outer layers (S1) and (S5) are also referred to below as polymer layers (S1) and (S5), these always being the outer layers.
  • the polymer (PI) can be any polymer that has a Vicat softening point >149°C, preferably >160°C, more preferably >170°C; more preferably >180°C, determined in accordance with fSO 306:2004 (50N; 50°/h), and which the person skilled in the art would select for the multilayer structure (MA).
  • An opening in the form of a window can also be introduced into the multi-layer structure (MA), which offers the possibility of introducing one or more security features there, particularly in the case of security documents.
  • at least the polymer layers (S1) and (S2) are preferably transparent.
  • the polymer layers (S1), (S2), (S4) and (S5) and optionally also (S6) preferably have a light transmission in the visible range in a range from >85% to ⁇ 98%, preferably from >87% to ⁇ 95%, determined according to ISO 13468-2:2006-07.
  • the window is preferably only in the core layer (S3).
  • the core layer (S3) can contain any material that a person skilled in the art would select for this.
  • the core layer (S3) preferably contains a polymer (P3).
  • the polymer (P3) is preferably a thermoplastic.
  • the polymer (P3) is preferably selected from the group consisting of polycarbonate or copolycarbonate 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) or polystyrene acrylonitrile (SAN), thermoplastic polyurethanes, and polyolefins, such as, for example and preferably, types of polypropylene or polyolefins based on cyclic olefins (e.g.
  • poly- or copolycondensates of an aromatic dicarboxylic acid and aliphatic, cycloaliphatic and/or araliphatic Diols having 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 (PCTG) or poly - or copolybute ylene 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, for example and preferably, polycyclohex
  • the core layer (S3) can contain additives such as fillers, dyes, pigments, UV stabilizers and other additives, as explained further below in connection with the polymer layer (S1) or (S2),
  • the core layer (S3) preferably has a light transmission in visible light in the range from >85% to ⁇ 98%, determined according to ISO 13468-2:2006-07.
  • the core layer can be translucent or opaque. This can be achieved, for example, by adding fillers such as scattering particles or pigments such as carbon black, titanium dioxide, zirconium dioxide or barium sulfate.
  • the core layer has the filler in an amount in a range from 2 to 45% by weight, particularly preferably from 5 to 30% by weight, based on the total weight of the core layer (S3).
  • the core layer (S3) preferably has a layer thickness in the range from >100 mhi to ⁇ 750 mhi, preferably from >200 mhi to ⁇ 700 mhi, particularly preferably from >30 mhi to ⁇ 600 mhi.
  • the core layer (S3) preferably has at least one opening.
  • the at least one opening can have different shapes and sizes; the opening in the core layer (S3) preferably has a circular or elliptical shape.
  • the opening in the core layer (S3) is preferably made by punching with a suitable tool in the core layer (S3) using methods known to those skilled in the art.
  • the opening can also be made in the core layer (S3) by means of a laser, for example an ND:YAG laser (neodymium-doped yttrium aluminum garnet laser).
  • a laser for example an ND:YAG laser (neodymium-doped yttrium aluminum garnet laser).
  • the opening in the core layer (S3) is preferably not additionally filled with a thermoplastic material.
  • the polymer (PI) is selected from the group consisting of a polycarbonate, a co-polycarbonate and mixtures of at least two of these.
  • the polymer (PI) for the polymer layers (S1) and (S5) is preferably selected independently of one another.
  • the polymer (PI) for the polymer layer (S1) can differ from the polymer (PI) of the polymer layer (S5).
  • the polymer (PI) of the polymer layer (S1) can be the same as for the polymer layer (S5).
  • the polymer (PI) is preferably selected from the group consisting of aliphatic or aromatic polycarbonates or co-polycarbonates.
  • Aromatic polycarbonates or co-polycarbonates are preferably suitable as polycarbonates or co-polycarbonates.
  • the polycarbonates or co-polycarbonates can be linear or branched in a known manner.
  • polycarbonates or co-polycarbonates can be produced in a known manner from diphenols, carbonic acid derivatives, chain terminators if appropriate and branching agents if appropriate. Details of the production of polycarbonates and co-polycarbonates have been laid down in many patent specifications for about 40 years. An example is Schnell, "Chemistry and Physics of Polycarbonates", Polymer Reviews, Volume 9, Interscience Publishers, New York, London, Sydney 1964, on D. Freitag, U. Grigo, P. R. Müller, H. Nouvertne', BAYER AG, "Polycarbonates” in Encyclopedia of Polymer Science and Engineering, Volume 11, Second Edition, 1988, pages 648-718 and finally to Drs. U. Grigo, K. Kirchner and P. R.
  • Suitable diphenols can be, for example, dihydroxyaryl compounds of the general formula (I), HO-Z-OH (I) where 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 bridge members.
  • dihydroxyaryl compounds examples include: dihydroxybenzenes, dihydroxydiphenyls, bis(hydroxyphenyl) alkanes, bis(hydroxyphenyl) cycloalkanes, bis(hydroxyphenyl) aryls, bis(hydroxyphenyl) ketones, bis(hydroxyphenyl) sulfones, Bis(hydroxyphenyl) sulfoxides and their nucleus-alkylated and nucleus-halogenated compounds.
  • dihydroxyaryl compounds examples include resorcinol, 4,4'-dihydroxydiphenyl, bis(4-hydroxyphenyl)methane, bis(3,5-dimethyl-4-hydroxyphenyl)methane, bis(4-hydroxyphenyl)diphenylmethane , 1 , 1 -bis-(4-hydroxyphenyl)- 1 -phenyl -ethane, 1 ,1 -bis-(4-hydroxyphenyl)- 1 -( 1 - naphthyl)-ethane, l,l-bis-(4- hydroxyphenyl)-1-(2-naphthyl)ethane, 2,2-bis(3,5-dimethyl-4-hydroxyphenyl)propane, 2,2-bis(4-hydroxyphenyl)-1-phenylpropane , 2,2-bis(4-hydroxyphenyl)hexafluoropropane, 2,4-bis(4-hydroxyphenyl)-2-methylbutane
  • 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(3 ,5-dimethyl-4-hydroxyphenyl)propane, 1,1-bis(4-hydroxyphenyl)cyclohexane, 1,1-bis(3,5-dimethyl-4-hydroxyphenyl)cyclohexane, 1,1- Bis(4-hydroxyphenyl)-3,3,5-trimethylcyclohexane, 1,1'-bis(4-hydroxyphenyl)-3-diisopropylbenzene and 1,
  • Very particularly preferred dihydroxyaryl compounds are 4,4'-dihydroxydiphenyl and 1,1-bis(4-hydroxyphenyl)-3,3,5-trimethylcyclohexane. Both a dihydroxyaryl compound to form homopolycarbonates and different dihydroxyaryl compounds to form co-polycarbonates can be used. Both one dihydroxyaryl compound of formula (I) or (Ia) (formula shown below) to form homopolycarbonates and several one dihydroxyaryl compounds of formula (I) and/or (Ia) to form co-polycarbonates can be used. The various dihydroxyaryl compounds can be linked to one another either randomly or in blocks.
  • the molar ratio of dihydroxyaryl compounds of the formula (Ia) to the other dihydroxyaryl compounds of the formula (I) that may also be used is preferably between 99 mol % of (Ia). 1 mol% (I) and 2 mol% (Ia) to 98 mol% (I), preferably between 99 mol% (Ia) to 1 mol% (I) and 10 mol% (Ia). 90% by moles of (I) and in particular between 99% by moles of (Ia) to 1% by moles of (I) and 30% by moles of (Ia) to 70% by moles of (I).
  • a very particularly preferred co-polycarbonate can be prepared using 1,1-bis(4-hydroxyphenyl)-3,3,5-trimethylcyclohexane and dihydroxyaryl compounds of the formula (Ia) and (I).
  • Suitable carbonic acid derivatives can be, for example, diaryl carbonates of the general formula (II), wherein
  • 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-isopropylphenyl phenyl carbonate, di(4-isopropylphenyl) carbonate, 4-n-butylphenyl phenyl carbonate, di(4-n-butylphenyl).
  • diaryl compounds are diphenyl carbonate, 4-tert-butylphenyl phenyl carbonate, di-(4-tert-butylphenyl) carbonate, biphenyl-4-yl-phenyl carbonate, di-(biphenyl-4-yl) carbonate, 4-( 1 -Methyl- 1 -phenylethyl)phenyl phenyl carbonate, di[4-( 1 -methyl- 1 -phenylethyl)phenyl] carbonate and di(methyl salicylate) carbonate.
  • Diphenyl carbonate is very particularly preferred.
  • one or more monohydroxyaryl compound(s) can additionally be used as chain terminators, for example, which were not used to prepare the diaryl carbonate(s) used.
  • chain terminators for example, which were not used to prepare the diaryl carbonate(s) used.
  • These can be those of the general formula (III), in which
  • R A is linear or branched Ci-C34-alkyl, C6-C34-alkylaryl, CVC ⁇ -aryl or -COO- RD, where R D is hydrogen, linear or branched Ci-C34-alkyl, C7-C34 - alkylaryl or CVC ⁇ -aryl, and
  • R B , R c independently of one another, are identical or different for hydrogen, linear or branched Ci-C34-alkyl, C7-C34-alkylaryl or CVC ⁇ -aryl.
  • Preferred monohydroxyaryl compounds are 1-, 2- or 3-methylphenol, 2,4-dimethylphenol, 4-ethylphenol, 4-n-propylphenol, 4-isopropylphenol, 4-n-butylphenol, 4-isobutylphenol, 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, e
  • Particularly preferred are 4-tert-butyl phenol, 4-iso-octyl phenol and 3-pentadecyl phenol.
  • Suitable branching agents can be compounds with three or more functional groups, preferably those with three or more hydroxyl groups.
  • suitable compounds having three or more phenolic hydroxyl groups are phloroglucinol, 4,6-dimethyl-2,4,6-tri-(4-hydroxyphenyl)-heptene-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-hydroxyphenylisopropyl)phenol and tetra(4-hydroxyphenyl)methane.
  • Examples of other suitable compounds having three or more functional groups are 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 polymer layer (S1) can contain additives, such as fillers, dyes, pigments, UV stabilizers and other additives, as also explained further below in connection with the polymer layer (S3).
  • the first polymer layer (S1) preferably has a transparency in the visible wavelength range, preferably in the range from >70% to ⁇ 99%, preferably from >80% to ⁇ 95%, particularly preferably >88% to ⁇ 93%, determined according to ISO 13468-2:2006-07 on.
  • the further polymer layer (S2) preferably has transparency in the visible wavelength range, preferably in the range from >70% to ⁇ 99%, preferably from >80% to ⁇ 95%, particularly preferably >88% to ⁇ 93%, determined according to ISO 13468 -2:2006-07 on.
  • the multilayer structure (MA) has at least one further layer (S6), which preferably contains a polymer selected from the group consisting of polymer (PI), polymer (P2) and a mixture thereof.
  • the layer (S6) can also contain paper, metal, glass or other materials.
  • One of the at least one further layers (S6) is preferably arranged either between layers (S2) and (S3) and/or between layers (S3) and (S4).
  • the at least one further layer (S6) particularly preferably contains a polymer from the group of polymers (PI).
  • the polymer layer (S5) or the polymer layer (S6) preferably has the same composition of polymers as the polymer layer (S1).
  • the polymer (PI) is a polycarbonate or co-polycarbonate of the formula (Ia), (1-2), (1-3) or (1-4), where (Ia) wherein R 1 and R 2 are independently hydrogen, halogen, preferably chlorine or bromine, Ci-Cs-alkyl, GG-cycloalkyl.
  • R 3 and R 4 can be selected individually for each X, independently of one another hydrogen or Ci-G,- alkyl and
  • X is carbon, with the proviso that on at least one atom X, R 3 and R 4 are simultaneously alkyl, or 0-3) fl 4) in which R 5 is a C 1 -C 4 -alkyl radical, aralkyl radical or aryl radical, preferably a methyl radical or phenyl radical, very particularly preferably a methyl radical;
  • the one or more polycarbonate or co-polycarbonate based on diphenols of the polymer layer (S1) or (S5) preferably has an M w (weight-average molecular weight, determined by size exclusion chromatography (SCE) after prior calibration with polycarbonate calibration substances) of at least 10,000 g/mol, preferably from 15,000 g/mol to 300,000 g/mol, particularly preferably 17,000 to 36,000 g/mol, very particularly preferably 17,000 to 34,000 g/mol. on.
  • the polymer (PI) can be linear or branched, they can be homopolycarbonates or copolycarbonates.
  • the at least one polycarbonate or co-polycarbonate based on diphenols of the polymer (PI) preferably comprises a carbonate structural unit of the formula (1-1).
  • polycarbonates or copolycarbonates can be prepared in a known manner from diphenols, carbonic acid derivatives, any chain terminators and any branching agents. Details of the manufacture of polycarbonates have been laid down in many patent specifications over the last 40 years. As an example here only on H. Schnell, “Chemistry and Physics of Polycarbonates", Polymer Reviews, Volume 9, Interscience Publishers, New York, London, Sydney 1964, on D. Freitag, U. Grigo, P. R. Müller, H. Nouvertne' , BAYER AG, "Polycarbonates” in Encyclopedia of Polymer Science and Engineering, Volume 11, Second Edition, 1988, pages 648-718 and on Drs. U. Grigo, K. Kirchner and P. R. Müller “Polycarbonate” in Becker/Braun,
  • radicals R 1 and R 2 in formula (I-la) are preferably hydrogen.
  • Preferred alkyl residue in formula (I-la) for R 3 , R 4 is methyl; the X atoms in the alpha position to the diphenyl-substituted C atom (Cl) are preferably not dialkyl-substituted, and at least one X atom in the beta-position to Cl is preferably alkyl disubstituted.
  • the polycarbonate or the co-polycarbonate is partially produced from the starting materials selected from the group consisting of: or mixtures of at least two of these.
  • the polycarbonates can be prepared from diphenols of the formula (I-1a).
  • At least one of the polymer layers (S1), (S2), (S3), (S4) and/or (S5) of the multilayer structure (MA) can also have at least one filler.
  • the filler is preferably at least one color pigment and/or at least one other filler for producing translucency in the filled layers, particularly preferably a white pigment, very particularly preferably titanium dioxide, zirconium dioxide or barium sulfate, in a preferred embodiment titanium dioxide.
  • the filling of at least one polymer layer (S1), (S2), (S3), (S4) or (S5) and possibly (S6) of the multilayer structure (MA) with at least one such filler can reduce the visibility of the inscription or images introduced, thereby further enhancing the perception of improved sharpness and resolution, or preventing visibility of electronic components such as antennas and IC's.
  • any combination of filling in the individual layers (S1) to (S6) can be made.
  • the fillers mentioned are preferably in amounts of 2 to 45 wt .-%, particularly preferably from 5 to 30 wt .-%, based on the total weight of the respective polymer layer (S2), S (3), or (S4), the Filler contains, which can be done for example by extrusion or coextrusion added. In particular, this is the core layer (S3), less preferably these are the polymer layers (S2) or (S4).
  • the polymer layer (Sl) or (S5) preferably contains 0 to 1% by weight, more preferably 0.01 to 0.5% by weight, particularly preferably 0.05 to 0.1% by weight of a filler from the List as mentioned above, based on the total weight of the polymer layer (S1) or (S5).
  • the polymer layer (S2), (S3) and/or (S4) preferably comprises a filler and the polymer layers (S1) and (S5) are free from fillers.
  • the polymer layers (S1), (S2), (S4) and/or (S5) are particularly preferably free of fillers.
  • Part of the multilayer structure (MA) according to the invention comprising at least one polymer layer (Sl) and a further polymer layer (S2) and optionally a further layer (S6) between the layers, i.e. ((S1)-(S6)-(S2)) or next to layer (S2) ((S1)-(S2)-(S6)) or alternatively or additionally the polymer layers (S4) and (S5) with optionally a further layer (S6) between the layers ((S4)-(S6) -(S5)) or in addition to layer (S4), i.e.
  • ((S6)-(S4)-(S5)) can, for example and preferably, by means of coextrusion of the layers contained, lamination of the layers contained or extrusion lamination, i.e. extruding on the layer(s) getting produced.
  • the variants of coextrusion and extrusion are preferred.
  • the production of at least part of the multilayer structure (MA) by means of coextrusion of at least the polymer layers (S1) and (S2) or (S4) and (S5) is very particularly preferred.
  • a coextruded multilayer structure comprising at least one further polymer layer (S2) and/or (S4) and/or optionally (S6) containing at least one blend of at least one or more poly- or copolycondensate(s) of an aromatic and / or cycloalkyl dicarboxylic acid and aliphatic, cycloaliphatic and / or araliphatic diols having 2 to 16 carbon atoms with one or more polycarbonate or co-polycarbonate (s), characterized in that the proportion of poly- or co-polycarbonate (s) in this blend in a range from >50% by weight to ⁇ 90% by weight, preferably in a range from >60% by weight to ⁇ 80% by weight, very particularly preferably in a range from >60% by weight to ⁇ 70% by weight, and that the poly- or copolycondensate(s) of an aromatic and/or cycloalkyl Dicarboxylic acid
  • the coextruded multilayer structure (MA) optionally contains a further layer (S6), this further layer (S6) containing one or more poly- or copolycondensate(s) of an aromatic and/or cycloalkyl dicarboxylic acid and aliphatic, cycloaliphatic and/or araliphatic diols 2 to 16 carbon atoms and the layers are arranged so that the two polymer layers (Sl) and (S5) form the outer layers of the coextruded multilayer structure (MA).
  • S6 further layer containing one or more poly- or copolycondensate(s) of an aromatic and/or cycloalkyl dicarboxylic acid and aliphatic, cycloaliphatic and/or araliphatic diols 2 to 16 carbon atoms and the layers are arranged so that the two polymer layers (Sl) and (S5) form the outer layers of the coextruded multilayer structure (MA).
  • the multi-layer structure (MA) according to the invention is outstandingly suitable as a component for security documents, preferably identification documents and/or bank cards.
  • the multi-layer structure (MA) is particularly suitable for labeling using laser engraving.
  • Laser engraving can preferably be used to introduce personalizing lettering and/or images into one of the polymer layers (S1), (S2), (S4), (S5) or optionally (S6).
  • the multilayer structure (MA) is very particularly preferably suitable for identification documents in the form of bonded or laminated layer composites in the form of plastic cards, such as ID cards, passports, driving licenses, credit cards, bank cards, cards for access control or other identification documents, etc.
  • Preferred identification documents are in the context the present invention, multi-layer, sheet-like documents with security features such as chips, photographs, biometric data, etc. These security features can be visible from the outside or at least can be queried.
  • Such an identification document preferably has a size between that of a bank card and that of a passport.
  • Such an identification document can also be part of a document consisting of several parts, such as a plastic identification document in a passport, which also contains paper or cardboard parts.
  • the multi-layer structure (MA) shows good adhesion of the individual polymer layers in layer structures, such as in security documents, with high resolution, clarity, transparency, flatness and low warpage, even at high lamination temperatures.
  • the multi-layer structure (MA) in particular as a component in security documents, preferably identification documents and/or bank cards, has very good chemical resistance, in particular to acetone and artificial skin fat.
  • the durability of security documents containing the multi-layer structure (MA) is better than that of conventional cards, which can be seen by looking at all the parameters mentioned together.
  • the polycarbonate or the copolycarbonate contains the starting compound (Ib) in a range from 10% by weight to 90% by weight, based on the total mass of the polycarbonate or the copolycarbonate or the polycarbonate or the co-polycarbonate has a molar ratio of (Ib) to other bisphenol A derivatives in a range from 1:10 to 10:1, preferably in a range from 1:5 to 5:1.
  • the polymer layers (S2), (S3) and (S4) independently contain at least one polymer (P2) or consist of it, selected from the group consisting of a polycarbonate, a mixture or a blend a polycarbonate and a co-polyester or mixtures of at least two of these.
  • the polymer layer (S4) preferably has a transparency in the visible wavelength range, preferably in the range from >70% to ⁇ 99%, preferably from >80% to ⁇ 95%, particularly preferably >88% to ⁇ 93%, determined according to ISO 13468- 2:2006-07 on.
  • the complete multilayer structure (MA) or one of the polymer layers (S1) or (S5) or optionally (S6) has at least one, preferably at least two, particularly preferably all of the following properties: (A) a thickness in the range of 10 to 1000, preferably in the range of 20 to 950 mils, more preferably in the range of 30 to 900 mils, most preferably in the range of 50 to 800 mils;
  • (C) a vertical deviation in the thickness of the multilayer structure (MA) in a range from >0.002 to ⁇ 0.020 mm, more preferably in a range from >0.003 to ⁇ 0.015 mm, most preferably in a range from >0.005 to ⁇ 0, 01 mm over the entire surface of the multi-layer structure (MA);
  • (F) a transparency in a range from 20 to 98%, preferably from 50 to 95%, particularly preferably from 60 to 90%, measured according to ISO 13468-2:2006-07.
  • the multilayer structure (MA) preferably has at least one, preferably a combination of properties selected from the group consisting of (A); (B); (C); (D); (E); (F); (A) and (B);
  • the flatness mentioned in the property (B) can be determined by measuring the height deviation of a 500*600mm piece of the multi-layer structure (MA) with a ruler when the piece is placed on a flat surface such as a table.
  • the flatness is preferably determined on both sides of the flat multi-layer structure (MA).
  • the values of the flatness measurements on both sides of the multilayer structure (MA) are preferably in the stated range of property (B).
  • the flatness values on one side of the (MA) preferably deviate by no more than 10%, preferably no more than 5%, from the flatness values of the opposite side of the (MA), with the side of the (MA) having the higher Values form the basis for determining the deviation.
  • (B) a transparency in a range from 20 to 98%, preferably from 50 to 95%, particularly preferably from 60 to 90%, measured according to ISO 13468-2:2006-07.
  • the polymer layer (S2) or (S4) preferably has at least one, preferably both, of the following properties:
  • (C) a thickness in a range from 10 to 100 ⁇ m, preferably in a range from 20 to 90 ⁇ m, more preferably in a range from 25 to 85 ⁇ m, particularly preferably in a range from 30 to 80 ⁇ m, very particularly preferably in a range of 40 to 70 pm.
  • One of the polymer layers (S1), (S2), (S3), (S4), (S5) or (S6) preferably contains a laser-sensitive additive, preferably a black pigment, particularly preferably carbon black.
  • the polymer layer, which contains the laser-sensitive additive, can be easily personalized using laser engraving.
  • laser inscribed means inscribed by means of laser engraving.
  • the laser engraving process is known to those skilled in the art and should not be confused with printing using laser printers.
  • laser marking additives for example, so-called laser marking additives come into question, ie those from an absorber in the wavelength range of the laser to be used, preferably in the Wavelength range of ND:YAG lasers (neodymium-doped yttrium aluminum garnet lasers).
  • ND:YAG lasers neodymium-doped yttrium aluminum garnet lasers
  • Such laser marking additives and their use in molding compositions are described, for example, in WO-A 2004/50766 and WO-A 2004/50767 and are commercially available from DSM under the brand name MicabsTM.
  • Absorbers that are also suitable as laser-sensitive additives are carbon black and phosphorus-containing tin-copper mixed oxides, as described, for example, in WO-A 2006/042714.
  • the laser-sensitive additive can be contained in the polymer layers (S1) and/or (S2) and/or (S3) in an amount of 0.5 to 180 ppm, preferably 1 to 160 ppm, particularly preferably 5 to 120 ppm.
  • ppm is to be understood as meaning ppm by weight, unless otherwise stated.
  • the particle size of the laser-sensitive additive is in the range from 100 nm to 10 ⁇ m, and it is particularly advantageous if it is in the range from 50 nm to 2 ⁇ m.
  • laser-sensitive additives preferably black pigments, particularly preferably carbon black
  • S1 and/or (S2) and/or (S4) and/or (S5) does not impair the transparency of the multilayer structure (MA).
  • Another subject of the invention relates to a method for producing a multi-layer structure (MA), comprising the steps: i) providing at least one first outer layer (S1), at least one further polymer layer (S2), at least one core layer (S3), at least one further polymer layer (S4), at least one second outer layer (S5) and optionally at least one further polymer layer (S6); ii) arranging the layers (S1) to (S5), optionally (S6) in any order, with the proviso that the outer layers (S1) and (S5) each form an outer layer of the multilayer structure (MA); iii) forming a laminate from the polymer layers (S1) to (S5) and optionally (S6) provided in step i) and arranged in step ii) at a temperature (TI) of >150°C, preferably >180°C, more preferably >200° C., very particularly preferably >210° C., which acts equally on at least one of the two outer layers (S1) or (S5), preferably on
  • the provision of the polymer layers (S1) to (S5) and optionally (S6) in steps i) can be carried out in any way that the person skilled in the art for lamination to produce the multilayer structure (MA) would select.
  • the provision preferably takes place in a continuous lamination system.
  • the order of the layers (Sl) to (S6) can be chosen freely so that an arrangement of the layers in step ii) can be chosen freely, as long as the polymer layer (S1) and (S5) each have one form the outer layer.
  • the formation of the laminate in step iii) can be done in any way that the person skilled in the art would choose for a lamination at a temperature (TI) of at least 150°C and preferably at most 300°C.
  • the lamination preferably takes place in the form of a roll lamination, in which the polymer layers provided from steps i) to ii) are guided over at least two opposite rollers or rollers, also called a pair of rollers. At least one of the at least two rolls or rollers is heated to a temperature (TI).
  • the roll lamination preferably takes place over two pairs of rolls connected in series, of which each of the 4 rolls can be heated individually.
  • a cooling station is preferably located between and/or behind the pairs of rollers, which is cooled to a temperature significantly below (TI).
  • the cooling stations are preferably brought to a temperature in a range from 10 to 100.degree. C., preferably from 15 to 80.degree. C., particularly preferably from 20 to 50.degree.
  • the polymer layer (S1) which is on the outside (AS1), then comes into contact with the heated cylinders or rollers.
  • the second roll or roll can also be heated, heated less than the first roll or roll or not heated at all.
  • the opposite pairs of rollers are preferably equally heated to a temperature (TI) which is >150°C, preferably >180°C, more preferably >200°C, very particularly preferably >210°C, but at most 300°C.
  • the contact area of the rollers on the outer layers (S1) and (S5) is preferably 1 to 100 mm, preferably 2 to 50 mm, particularly preferably 3 to 20 mm.
  • All properties, compositions, dimensions and configurations of the multilayer structure (MA) according to the invention can also be used in connection with the method for producing the multilayer structure (MA) and are not mentioned again here to avoid repetition.
  • the heat input into the respective outer layers (AS1) or (AS2), in particular the polymer layer (S1) or (S5) in step iii) is at least >50 J/s*m 2 , preferably >60 J/s s*m 2 , particularly preferably >80 J/s*m 2 .
  • This specification is made in Joule (J)/second (s) * square meter (m 2 ).
  • the heat is applied to the respective polymer layer (S1) and/or (S5) in step iii) at a roll temperature of Temperature (TI) starting from 23 °C within ⁇ 15 seconds, preferably ⁇ 10 seconds, more preferably ⁇ 5 seconds, in particular in a range from 5 to 10 seconds.
  • TI Temperature
  • the polymer layer (S1) or the polymer layer (S5) independently contains at least one polymer (PI) selected from the group consisting of a polycarbonate, a co-polycarbonate or a mixture of at least two thereof.
  • PI polymer
  • the polymer layer (S2), (S3), (S4) or the polymer layer (S6) independently contains at least one polymer (P2) selected from the group consisting of a polycarbonate, a mixture or a blend a polycarbonate and a co-polyester or a mixture of at least two thereof.
  • Another subject matter of the invention relates to a laminate, in particular a security document containing a multi-layer structure (MA) according to the invention or a multi-layer structure (MA) produced by the method according to the invention.
  • MA multi-layer structure
  • MA multi-layer structure
  • the security document is preferably an identification document, such as an ID card or a passport, and/or a bank card containing at least one multi-layer structure (MA).
  • an identification document such as an ID card or a passport
  • a bank card containing at least one multi-layer structure (MA).
  • the security document according to the invention can have further additional layers, for example at least one polymer layer (S6), via which, for example, further information is introduced into the security document, preferably an identification document and/or bank card.
  • the polymer layer (S6) preferably contains the polymer (P2) in an amount in a range from 50 to 100% by weight, more preferably in a range from 70 to 98% by weight, particularly preferably in a range from 80 to 95% % by weight, based on the total weight of the polymer layer (S6).
  • the polymer layer (S6) can likewise have additives, as already mentioned for the polymer layers (S1), (S2) and (S3), preferably in the same amounts as stated there.
  • Such additional information can be, for example, personalizing portraits or non-personalizing general information that is contained in the same form, for example, in every security document of the same type, preferably an identification document and/or bank card.
  • Such layers can, for example, be made with this information beforehand using conventional printing methods, preferably inkjet or laser printing, particularly preferably color printing equipped foils or polymer layers are introduced into the security document, preferably identification document and/or bank card.
  • Films or polymer layers which can be printed by means of ink-jet printing processes are known per se to the person skilled in the art and can also be the inventive polymer layers (S6), for example.
  • plastic films or polymer layers (S6) colored white or translucent by means of fillers such as titanium dioxide, zirconium dioxide, barium sulfate etc. are used to improve the visibility of the printed information.
  • inventive polymer layers which have a specific surface resistance of 10 7 to 10 13 W, preferably 10 8 to 10 12 W.
  • the specific surface resistance in W is determined according to DIN IEC 60093 (1993).
  • polymer layers (Sl), (S5) or optionally (S6) in which the plastic before layer production to achieve the specific surface resistance, for example, an additive selected from tertiary or quaternary, preferably quaternary ammonium or phosphonium salts partially or perfluorinated organic acid or quaternary ammonium or phosphonium hexafluorophosphates, preferably a partially or perfluorinated alkylsulfonic acid, preferably a perfluoroalkylsulfonic acid.
  • additives can be contained in particular in the polymer layer (S1) and/or (S5), but also to a small extent in the polymer layers (S2) and/or (S3), (S4), (S6).
  • Preferred suitable quaternary ammonium or phosphonium salts are:
  • the ammonium salts are preferred.
  • the perfluorooctanesulfonic acid tetrapropylammonium salt, the perfluorooctanesulfonic acid tetrabutylammonium salt, the perfluorooctanesulfonic acid tetrapentylammonium salt, the perfluorooctanesulfonic acid tetrahexylammonium salt and the perfluorooctanesulfonic acid dimethyldiisopropylammonium salt and the corresponding perfluorobutanesulfonic acid salts are very particularly suitable.
  • Perfluorobutanesulfonic acid dimethyldiisopropylammonium salt (diisopropyldimethylammonium perfluorobutylsulfonate) is particularly preferably used as an additive.
  • the salts mentioned are known or can be prepared by known methods.
  • the salts of the sulfonic acids can be prepared, for example, by combining equimolar amounts of the free sulfonic acid with the hydroxy form of the corresponding cation in water at room temperature and evaporating the solution.
  • Other manufacturing processes are described, for example, in DE-A 1 966931 and NL-A 7 802 830.
  • the salts mentioned are preferably used in amounts of from 0.001 to 2% by weight, preferably from 0.1 to 1% by weight, based on the total weight of the respective polymers (PI), (P2) or (P3), the polymers (PI), ( P2) or (P3) added before shaping to give the multilayer structure (MA) according to the invention, which can preferably be carried out by extrusion or coextrusion.
  • the multilayer structure (MA) according to the invention is preferably used for the accelerated production of a laminate, which preferably within 15 seconds, more preferably within 10 seconds, particularly preferably within 5 seconds, in particular in a range from 5 to 10 seconds, preferably using Temperatures in a range from 180°C to 230°C, particularly preferably from 190°C to 210°C.
  • a pressure in a range from 10 N/cm 2 to 400 N/cm 2 , preferably from 30 N/cm 2 to 300 N/cm 2 , particularly preferably from 40 N/cm 2 to 250 N / cm 2 applied.
  • Another subject of the invention relates to the use of a multi-layer structure (MA) according to the invention or a multi-layer structure (MA) produced by the method according to the invention for a surface treatment, in particular a lamination at a temperature (TI) in a range from >160° C.
  • a pressure in a range from 10 N/cm 2 to 400 N/cm 2 , preferably from 30 N/cm 2 to 300 N/cm 2 , particularly preferably from 40 N/cm 2 to 250 N / cm 2 applied.
  • the multi-layer structure (MA) is layered in one of the arrangement options described above in connection with the multi-layer structure (MA) according to the invention and its production method, and for as low a level as possible Period of time, preferably for 5 to 30 seconds, preferably 10 to 20 seconds of the selected temperature (TI) and exposed to an elevated pressure.
  • the pressure is preferably in a range from 10 N/cm 2 to 1400 N/cm 2 , preferably from 30 N/cm 2 to 1200 N/cm 2 , particularly preferably from 40 N/cm 2 to 1000 N/cm 2 .
  • both the temperature and the pressure are preferably transferred to the polymer layers (S1) to (S5) and the substrate via a cylinder or roller, the pressure is applied only for a short period of time. After the lamination process, a layer composite is obtained, which holds the layers laminated together in such a way that the layer composite can only be separated into the layers again by destroying the laminate, or that the individual layers can no longer be separated from one another at all.
  • a security document preferably an identification document, in particular in a structure as described above for this purpose.
  • the security document created in this way preferably an identification document and/or bank card
  • the security document created in this way can be produced, for example, in such a way that a stack of layers is put together from the various polymer layers and substrates for the structure of the security document, preferably an identification document and/or bank card, and laminated to form a layered composite and then into the appropriate one Lorm of the security document, preferably identification document and / or bank card is tailored. where appropriate further layers are subsequently applied to this composite laminate, for example by gluing and/or laminating on further films or coating using lacquer compositions.
  • EastarTM DN 010 Poly- or copolycondensate of a terephthalic acid from 54.9% by weight terephthalic acid, 9.3% by weight (38 mol% based on the diol component) ethylene glycol and 35.8% by weight % (62 mol % based on the diol component) cyclohexanedimethanol-1,4, with an inherent viscosity of 0.74 dl/g (measured in a 1:1 mixture of phenol and tetrachloroethane at 25° C.) from Eastman Chemical Company .
  • PocanTM B 1600 Unmodified polycondensate of terephthalic acid and 1,4-butanediol as the diol component with a melt volume rate (MVR) of 14 g/10 min according to ISO 1133 at 260° C. and 2.16 kg from Lanxess AG.
  • MakroionTM 3108 high-viscosity amorphous, thermoplastic bisphenol A polycarbonate from Covestro AG with an MVR of 6.5 g/10min according to ISO 1133-1:2011 at 300°C and a load of 1.2 kg and a Vicat softening point (VST).
  • ISO 306 2004 method B120 at 50 N; 120 °C/h of 150 °C and a glass transition temperature T g according to ISO 11357-1,-2 of 149 °C.
  • KRONOSTM 2230 Titanium dioxide from Kronos for polycarbonate and other engineering thermoplastics with a T1O2 content > 96%.
  • Example 1 High-temperature polycarbonate PC 1 as a polymer (PI):
  • Example 2 High-temperature polycarbonate PC 2 as a polymer (PI): Analogously to PC 1, a mixture of 91.6 g (0.40 mol) of bisphenol A and 185.9 g (0.60 mol) of 1,1-bis(4-hydroxyphenyl)-3,3,5-trimethylcyclohexane converted to the corresponding polycarbonate 2.
  • the polycarbonate showed a relative solution viscosity of 1.251, determined according to DIN EN ISO 1628-1:2009.
  • the Vicat softening point of the polymer was determined according to ISO 306:2004 Method B120 at 50 N; 120 °C/h determined to 204 °C.
  • the polycarbonate showed a relative solution viscosity of 1.248, determined according to DIN EN ISO 1628-1:2009.
  • the Vicat softening point of the polymer (PI) was determined according to ISO 306:2004 method B120 at 50 N; 120 °C/h determined to 216 °C.
  • Example 4 compounding of a batch for the production of a core layer (S3) comprising a thermoplastic as polymer (P2) and a white pigment as filler:
  • the batches for producing a white layer were produced using a conventional twin-screw compounding extruder (ZSK 32) at processing temperatures of 250 to 330.degree.
  • Table 1 Composition of compounds for the production of polymer layers (S2) comprising thermoplastics as polymer (P2)
  • the system used consists of
  • an extruder with a screw of 105 mm diameter (D) and a length of 41xD.
  • the screw has a degassing zone;
  • the granules of a polymer (P3) were fed into the hopper of the extruder.
  • the respective material was melted and conveyed in the respective cylinder/screw plasticizing system.
  • the material melt was fed to the nozzle. From the die, the melt reached the smoothing calender.
  • a matted steel roller (surface 4) and a matted rubber roller (surface 4) were used to structure the film surfaces.
  • the film or layer (S3) was then transported through a take-off, after which the layer (S3) was wound up. In this way, according to Table 2, the corresponding white opaque extrusion layers were produced.
  • Table 2 White opaque mono-layer extrusion film polymer layer (S2) or core layer (S3)
  • Table 3 transparent mono-layer extrusion films (for reference)
  • Example 8 Compounding of a Masterbatch Containing a Laser-Sensitive Additive
  • the masterbatch used to produce the laserable polymer layer(s) was produced using a conventional twin-screw compounding extruder (ZSK 32) at processing temperatures of 250 to 330.degree.
  • Vulcan XC 72 101 carbon black from Cabot
  • the system used consists of
  • an extruder with a screw of 105 mm diameter (D) and a catch of 41xD.
  • the screw has a degassing zone;
  • the base material granules were fed to the hopper of the main extruder.
  • the respective material was melted and conveyed in the form of the polymers (PI) or (P2). Both material melts were brought together in the coextrusion die. From the die, the melt reached the smoothing calender. The final shaping and cooling of the material takes place on the smoothing calender.
  • a structured metal roller (surface 6) and a structured rubber roller (surface 2) were used to structure the film surfaces. The film was then transported through a take-off, after which the film was wound up as a multilayer structure (MA) according to the invention.
  • the compositions of the films of the examples are described in Tables 4 and 5.
  • Table 4 Composition of the two-layer coextrusion films (Examples 9 to 15)
  • Table 5 Composition of three-layer (S1)-(S2)-(S6) coextruded film (Examples 17 to 19) Production of identification documents (ID card) by roll lamination (Ex. 20-29)
  • positions 1 and 8 are replaced by positions 2 and 7 in the appropriate number.
  • positions 3, 4, 5 and 6 can also be replaced by a layer from example 7a.
  • the roll laminator has 2 upper and 2 lower laminating tapes of the type standard ID 3 format with a width of approx. 120 mm each.
  • Each of the belts has two heating areas and one cooling area (each heating area with 3 heating elements and between them a cooling area with 6 cooling elements).
  • Each of the bands has a heating and a cooling area and can be heated or cooled separately and comes into contact with an outer layer of the multilayer structure plus a substrate in the form of the polymer layer (S4).
  • the two upper lamination tapes preferably come into contact with the polymer layer (S1) and the two lower ones with the polymer layer (S4).
  • the lamination tapes each have a heating unit M330 and a cooling unit M220.
  • the top two lamination tapes were heated to the temperature (TI) given in Table 7.
  • the two bottom lamination tapes were heated to a lower temperature than (TI) as also indicated in Table 7.
  • the cooling units are each arranged after a heating unit.
  • the residence times are also listed in Table 7.
  • the two were Experiments 20 to 29 and reference experiment 1 used throughput times of 2 ⁇ 8 seconds (examples 20 to 29) or 2 ⁇ 14 seconds in reference experiment 12 from Table 7.
  • the width and length of the heating zones—ie the areas (0.12 m ⁇ 2 m 0.24 m 2 )—are the same in reference experiment 1 and in experiments 20 to 19 according to the invention.
  • the mean value was used for the heat input, since, starting from an initial temperature of 25°C, the heat flow is very high at the beginning and decreases more and more as the contact temperatures of 176°C to 209°C are approached.
  • TI higher temperature
  • Sl polymer layer
  • a significantly increased throughput number can be achieved in the production of the ID cards.
  • the number of pieces per hour could be increased from 2616 per hour with conventional material to 4100 per hour. This could still be increased if the speed of the lamination belts could be further increased.
  • TI temperature
  • 190°C the maximum number of pieces possible on the system of 4100 pieces/hour was reached, with the material still not showing any structural changes, for example in the form of bubbles, even at 220°C.
  • All of the multilayer structures (MA) according to the invention could be laminated much more quickly than the reference laminates without any loss of adhesion.
  • the lamination time could be halved, so that the productivity of the roll lamination line could be doubled.
  • a multi-layer structure (MA) 100 according to the invention is shown schematically, which has a first outer layer (Sl) 10 and a further outer layer (S5) 50, between which there is a core layer (S3) 30, which is on both sides of a further Polymer layer (S2) 20 or (S4) 40 is surrounded.
  • step i) 100 the first polymer layer in the form of the first outer layer (S1), the core layer (S3), the polymer layer (S4) and the second outer layer (S5) was provided rolled up on a roll, so that it was rolled onto the lamination tape could be guided to the machine for laminating.
  • step ii) 200 the layers (Sl), (S2), (S3), (S4), (S5) and optionally (S6) were arranged relative to one another in such a way that the layers (Sl) and (S5) formed the outer layers and all layers could be fed parallel to each other onto the laminating belt of the laminating machine.
  • a further polymer layer (S6) was optionally provided rolled up on a roll, so that it could be introduced between the polymer layer (S1) and (S2).
  • step iii) 300 the laminate was formed at a temperature between 185 and 200°C as listed in Table 7.
  • the lamination tape moved at a speed of 0.1 m/s.
  • step iv) 400 the laminate is wound onto a roll.

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  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Laminated Bodies (AREA)

Abstract

L'invention se rapporte à une structure multicouche (MA) comprenant : (S1) au moins une première couche extérieure (S1) contenant un polymère (P1) ayant une température de ramollissement Vicat ≥ 149 °C, de préférence ≥ 160 °C, de préférence encore ≥ 170 °C, plus préférentiellement ≥ 180 °C, déterminée selon la norme ISO 306 : 2004 (50N ; 50 °/h) ; (S2) au moins une autre couche de polymère (S2) contenant un polymère (P2) ayant une température de ramollissement Vicat < 149 °C, de préférence ≤ 140 °C, plus préférentiellement ≤ 130 °C, déterminée selon la norme ISO 306 : 2004 (50N ; 50 °/h), de préférence dans une plage de 120 à 148 °C ; (S3) au moins une couche centrale (S3) ; (S4) au moins une autre couche de polymère (S4) contenant un polymère (P2) ayant une température de ramollissement Vicat < 149 °C, de préférence ≤ 140 °C, plus préférentiellement ≤ 130 °C, déterminée selon la norme ISO 306 : 2004 (50N ; 50 °/h), de préférence dans une plage de 120 à 148 °C ; (S5) au moins une deuxième couche extérieure (S5) contenant un polymère (P1) ayant une température de ramollissement Vicat ≥ 149 °C, de préférence ≥ 160 °C, de préférence encore ≥ 170 °C, plus préférentiellement ≥ 180 °C, déterminée selon la norme ISO 306 : 2004 (50N ; 50°/h). L'invention se rapporte également à un procédé de fabrication d'une telle structure multicouche et à un document de sécurité le contenant.
EP22747685.0A 2021-07-14 2022-07-11 Structure de film appropriée pour une stratification rapide Pending EP4370334A1 (fr)

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EP2218579A1 (fr) * 2009-02-13 2010-08-18 Bayer MaterialScience AG Procédé amélioré destiné à la fabrication d'un composite stratifié laminé
EP3501819A1 (fr) * 2017-12-22 2019-06-26 Covestro Deutschland AG Feuilles en matière plastique pour document d'id à luminosité des hologrammes estampés améliorée
KR20210099555A (ko) * 2018-12-03 2021-08-12 코베스트로 인텔렉쳐 프로퍼티 게엠베하 운트 콤파니 카게 층상 구조물에서의 높은 비캣 연화 온도를 갖는 플라스틱 필름
EP4073151A1 (fr) * 2019-12-12 2022-10-19 Covestro Intellectual Property GmbH & Co. KG Films ayant des propriétés spéciales

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