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AssigneeCovestro Deutschland AG
InventorsHeinz Pudleiner, Georgios Tziovaras, Wieland Hovestadt, Stefan Janke, Kira Planken
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The invention relates to a multi-layer structure (MA) comprising: (S1) at least one first outer layer (S1) containing a polymer (P1) having a Vicat softening temperature ≥149° C., preferably ≥160° C., further preferably ≥170° C., more preferably ≥180° C., determined according to ISO 306:2004 (50N; 50° h); (S2) at least one further polymer layer (S2) containing a polymer (P2) having a Vicat softening temperature <149° C., preferably ≤140° C., more preferably ≤130° C. determined according to ISO 306:2004 (50N; 50°/h), preferably in a range from 120 to 148° C.; (S3) at least one core layer (S3); (S4) at least one further polymer layer (S4) containing a polymer (P2) having a Vicat softening temperature <149° C., preferably ≤140° C., more preferably ≤130° C., determined according to ISO 306:2004 (50N; 50° h), preferably in a range of 120 to 148° C.; (S5) at least one second outer layer (S5) containing a polymer (P1) having a Vicat softening temperature ≥149° C., preferably ≥160° C., further preferably ≥170° C., more preferably ≥180° C., determined according to ISO 306:2004 (50N; 50°/h). The invention also relates to a method for manufacturing such a multi-layer structure and to a security document containing same.
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The method according to claim 9, wherein heat is inputted to the respective polymer layer (S1) and (S5) in step iii) for achieving the temperature (T1) starting from 23° C. within ≤15 seconds.
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(canceled)
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Dependencies are inferred from the claim text.