Security Film with Controlled Destruction Layer
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Solution Overview
Problem
Existing document security technologies, such as multilayer transfer films, are difficult to protect against fraudulent attempts to extract optical security components, as they often result in unpredictable destruction patterns when attempting to tear off these components, failing to effectively prevent counterfeiting.
Innovation Solution
A transferable security film with a controlled destruction layer that separates from the substrate in a predetermined pattern upon malicious tearing, combined with an adhesive and detachment layer for secure adhesion and transfer, and a protective film for additional protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multilayer transfer films are used for document security, then optical security components can be transferred onto documents, but the components can be extracted and reused in counterfeit documents through fraudulent removal attempts
Solution Approach 1:
The security film is segmented into distinct functional layers: an optically active layer containing the security component, a controlled destruction layer that selectively detaches upon fraudulent removal attempts, and a backing layer. This segmentation allows the security component to remain intact on legitimate documents while enabling controlled destruction patterns that prevent extraction and reuse in counterfeit documents.
2Reliability
If the security layer assembly is made difficult to remove, then document security is enhanced, but the optical security components may be completely destroyed in unpredictable patterns
Solution Approach 1:
The controlled destruction layer is pre-configured with specific adhesive properties and structural characteristics before the security film is applied to the document. This preliminary configuration ensures that upon fraudulent removal attempts, the layer will detach in a predetermined controlled pattern rather than causing unpredictable complete destruction, thus maintaining both security and precision.
3Reliability
If a protective film is applied to cover the entire substrate, then additional protection is provided, but the controlled destruction effect may be compromised
Solution Approach 1:
The controlled destruction layer is positioned and configured to provide localized functionality at the interface between the security film and the substrate. This local placement ensures that the controlled destruction effect operates specifically where needed (at the security component interface) without being compromised by the general protective film coverage, thus maintaining both protection and controlled destruction functionality.
Data Source
Figure 1~2
Figure 3~4
Figure 5A
AI summary
This description relates to a security film (20) transferable onto a substrate (100) of a document to be secured, the security film comprising a support film (21) intended to be discarded after transfer; a set of security layers (23) giving a recognizable optical effect to the security film; a discontinuous controlled destruction layer (26) arranged between the support film and a first face of the set of security layers, said controlled destruction layer being intended to remain attached to the set of security layers during the transfer of the security film onto the substrate.