Security Document Polymer Composite Inkjet Laser Engraving
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Solution Overview
Problem
Existing methods for producing security and/or valuable documents fail to provide sufficient protection against manipulations, especially when colored personalized information is integrated, as the superficial arrangement of inkjet printed layers lacks a monolithic binding to the substrate, making them vulnerable to mechanical and chemical damages.
Innovation Solution
A method involving a polymer layer composite formed by thermal lamination of a polymer layer partial composite and a polymer cover layer, where personalized information is applied via inkjet printing and further secured with laser engraving, creating a monolithic structure that prevents manipulation by ensuring the polymer cover layer is materially joined with the partial composite.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If inkjet printed layer is applied to completed blank, then colored personalized information can be applied, but the arrangement is superficial and lacks monolithic binding to substrate making it vulnerable to mechanical and chemical damages
Solution Approach 1:
The patent merges the inkjet printed layer with the polymer substrate by embedding the printed layer within the polymer matrix during co-extrusion, creating a monolithic structure where the printed information becomes an integral part of the document rather than a superficial coating
Solution Approach 2:
The patent uses composite materials by combining polymer layers with embedded inkjet printed layers containing personalized information, creating a multi-layer composite structure that provides both color capability and manipulation resistance through the integrated design
2Reliability
If laser marking is used to integrate personalized information in internal layers, then protection against manipulation is improved, but integration of colored personalized information such as fully colored passport photographs is not possible
Solution Approach 1:
The patent combines laser marking technology with inkjet printing by embedding the printed colored layer within the polymer substrate, allowing both the manipulation resistance of laser-marked internal layers and the color capability of inkjet printing to coexist in a unified monolithic structure
Solution Approach 2:
The patent nests the inkjet printed colored layer within the polymer matrix, creating a hierarchical structure where the printed information is contained within the three-dimensional polymer volume, similar to nested dolls, providing both color and security
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This method provides high security against manipulation by integrating colored personalized information in a monolithic structure, making it impossible to remove the polymer cover layer without damaging the document, thus enhancing the protection of the information.
Implementation Method 1
a polymer layer composite being formed from a polymer layer partial composite and a polymer cover layer... B) a polymer cover layer is applied to the inkjet printed layer and is joined to the polymer layer partial composite
Implementation Method 2
C) second personalized information is inscribed into the polymer layer composite of the security and/or valuable document, obtained in step B), by means of laser engraving
Data Source
AI summary
The invention relates to a method for producing a security and/or valuable document containing a polymer layer composite or consisting thereof, said polymer layer composite being formed from a polymer layer partial composite and a polymer cover layer and the polymer layer partial composite and/or the polymer cover layer containing a laser sensitive component, consisting of the followings steps: A) first personalized information is applied to the polymer layer partial composite by means of an inkjet printing method as a colored inkjet printed layer, B) the polymer cover layer is applied to the inkjet printed layer and is joined to the polymer layer partial composite by thermal lamination, and C) second personalized information is inscribed into the polymer layer composite of the security and/or valuable document, obtained in step B), by means of laser engraving. The invention also relates to a security and/or valuable document that can be produced according to said method.