Laminate Internal Security Feature via Filled Substrate Depressions
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Solution Overview
Problem
Current security features for documents lack sufficient protection against forgery and manipulation, necessitating the development of enhanced internal security features that are difficult to replicate.
Innovation Solution
A laminate is produced with a translucent or opaque substrate layer and a further transparent or translucent layer, where indentations in the substrate layer are filled with a functional material, creating a see-through security feature that can vary in optical transmittance and include fluorescent or magnetic properties, thereby increasing security against forgery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional security features are used in documents, then the document can be produced with standard features, but the protection against forgery and manipulation is insufficient
Solution Approach 1:
The patent embeds a security feature layer within the substrate layer itself by creating depressions and filling them with material having different optical properties. This nesting approach integrates the security feature directly into the document structure rather than adding separate external layers, thereby improving anti-forgery protection while controlling complexity
Solution Approach 2:
The patent applies different optical properties to specific local regions (depressions) of the substrate layer. By creating localized areas with varying light transmission characteristics through selective filling of depressions, the security feature achieves enhanced protection without requiring the entire document structure to be complex
2Reliability
If embossed structures are created in thermoplastic layers, then three-dimensional security features can be produced, but the features can still be manipulated or forged
Solution Approach 1:
The patent uses composite material structure by combining substrate material with filling material that has different optical properties. The filling material is introduced into depressions created in the substrate layer, creating a composite structure with specific optical characteristics that are difficult to replicate and provide enhanced security against forgery
3Reliability
If microperforations are incorporated into opaque substrate layer, then internal security features can be created, but the manufacturing process becomes more complex
Solution Approach 1:
The patent segments the substrate layer by creating multiple depressions that can be selectively filled. This segmentation allows the security feature to be built up in discrete steps through selective filling of individual depressions or groups of depressions, creating internal security features while managing manufacturing complexity through a modular approach
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
The method enhances security by creating a visible, difficult-to-replicate internal feature that is easily verifiable under transmitted light, significantly increasing the cost for counterfeiters and making forgery evident.
Implementation Method 1
Different optical transmittances can be achieved through the recesses, thus creating a see-through feature in the form of a watermark
Implementation Method 2
Fluorescent or luminescent materials can be used as functional materials
Implementation Method 3
Fluorescent or luminescent materials can be used as functional materials
Implementation Method 4
a magnetic material, a material containing metal particles, or any combination thereof may also be used
Data Source
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AI summary
The invention relates to a method for producing a laminate (11) with an internal security feature (12), in which at least one translucent or opaque substrate layer (14) is provided, in which at least one further translucent or transparent layer (21, 22) is provided, in which the at least one substrate layer (14) and the at least one further layer (21, 22) are joined and laminated together to form a laminate (11), wherein recesses (16) are provided in a top surface (17) and/or bottom surface (18) of the at least one substrate layer (14) before joining with the at least one further translucent or transparent layer (21, 22), and wherein the at least one transparent or translucent layer (21,22) applied to the top (17) and/or bottom (18) of the substrate layer (14) which is provided with depressions (16), and at least a subset of the depressions (16) is filled with the at least one transparent and/or translucent layer (21, 22), and the internal depressions (16) form the internal security feature (12), wherein at least a subset of the depressions (16) in the substrate layer (14) are filled with at least one functional material to a predetermined degree of fill.