Transfer Film Integration for Polymer Security Papers
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Solution Overview
Problem
Current methods fail to effectively integrate conventional security threads into polymer papers of value or security papers, resulting in insufficient protection against forgery, as they cannot be directly applied to polymer substrates, leading to lower-quality printed imitations.
Innovation Solution
A method involving a transfer film with a detachable carrier film and a connecting layer is used to apply security features onto a polymer substrate, allowing for the permanent integration of various security features like holograms, embossed layers, or metallized layers, which can be easily detached, thereby enhancing forgery-proofing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional security threads are directly introduced into polymer papers, then high-quality security features can be applied, but the process is technically impossible with current methods
Solution Approach 1:
A transfer film is introduced as an intermediary carrier that holds the security feature and enables its transfer to the polymer substrate. The transfer film comprises a security feature layer and a carrier layer, allowing the security feature to be applied to the polymer paper without direct integration difficulties. This mediator resolves the contradiction by making the previously impossible direct introduction of security threads into polymer papers technically feasible while maintaining high quality.
2Ease of manufacture
If security threads are printed on polymer papers to imitate conventional security threads, then the process becomes feasible, but the quality and forgery protection are insufficient
Solution Approach 1:
Instead of printing a 2D representation of a security thread, the invention uses a transfer film to transfer a actual 3D security feature (such as a security thread, hologram, or embossed element) onto the polymer substrate. This copying approach preserves the physical characteristics and three-dimensional structure of conventional security features, achieving both feasibility and high quality simultaneously.
3Reliability
If multiple security features are applied to polymer papers, then forgery protection is enhanced, but production complexity increases
Solution Approach 1:
The security feature application process is segmented into modular components: the transfer film is divided into a security feature layer and a carrier layer, and multiple different security features can be applied to different regions of the polymer paper using the same transfer film mechanism. This segmentation allows complex security configurations to be achieved through simple, standardized operations, reducing overall production complexity while enhancing forgery protection.
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 enables the production of polymer papers with high-quality, forgery-proof security features, reducing production costs and maintaining a low thickness suitable for efficient stacking and printing, while providing comprehensive protection against forgery.
Implementation Method 1
For connecting the security feature to the polymer substrate, thermal energy and/or pressure is applied
Implementation Method 2
For connecting the security feature to the polymer substrate, thermal energy and/or pressure is applied
Data Source
AI summary
A method for producing polymer papers of value or polymer security papers is described. The method may include providing a polymer substrate of at least one polymer. The polymer substrate may have a first substrate side and a second substrate side. The method may also include providing a security element that includes a transfer film. The transfer film may include at least one security feature and a detachable carrier film. The method may further include applying the transfer film at least one of onto the first substrate side and onto the second substrate side, connecting the at least one security feature to at least one of the first substrate side and the second substrate side, and removing the detachable carrier film.