Nanocellulose Shaped Objects for Security Document Authentication
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Solution Overview
Problem
Current security features in paper products, such as planchettes, suffer from ease of replication by printing and loss of shape integrity due to bending or water absorption, making them ineffective against counterfeiting and requiring user education.
Innovation Solution
Incorporating nanocellulose-based shaped objects with high stiffness and fluorescent properties into paper products, which retain their shape and are visible only in transmitted light, using micromachining techniques and specific pulp preparation processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional planchettes are used in security documents, then they can be easily manufactured and incorporated, but they lose shape integrity due to bending and water absorption during processing
Solution Approach 1:
The patent changes the material parameters by using nanocellulose with specific properties (high stiffness, low water absorption) instead of conventional planchette materials. This parameter change enables the security feature to maintain shape integrity while remaining easy to manufacture and incorporate into paper products.
Solution Approach 2:
The patent employs composite material structure by combining nanocellulose with other materials to create shaped objects that possess both mechanical strength for shape retention and compatibility with paper manufacturing processes. The composite nature allows optimization of both ease of manufacture and shape integrity.
2Ease of manufacture
If conventional security features are used, then they can be implemented with existing technology, but they are easily replicated by counterfeiters using digital printing and scanning
Solution Approach 1:
The patent applies local quality by incorporating shaped nanocellulose objects with specific optical properties (fluorescence under UV light, visibility in transmitted light only) into specific locations within the paper product. This localized implementation creates security features that are difficult to replicate with conventional printing while maintaining compatibility with existing manufacturing processes.
Solution Approach 2:
The patent replaces conventional visual security features with nanocellulose-based features that have unique optical and mechanical properties. The substitution of material science principles for traditional printing-based security creates features that cannot be easily replicated by digital or laser printing methods.
3Reliability
If nanocellulose-based shaped objects are used, then shape integrity and counterfeit resistance are improved, but manufacturing complexity increases
Solution Approach 1:
The patent applies segmentation by producing nanocellulose-based shaped objects separately and then incorporating them into the paper product during the manufacturing process. This segmentation allows for specialized production of the security features using micromachining techniques while keeping the main paper manufacturing process relatively simple and compatible with existing equipment.
4Reliability
If nanocellulose-based shaped objects are incorporated into paper products, then security authentication is enhanced, but the paper manufacturing process becomes more complex
Solution Approach 1:
The patent applies preliminary action by preparing and shaping the nanocellulose objects before incorporating them into the paper pulp. This preliminary preparation allows the complex nanocellulose shaping to be done separately using micromachining, while the actual paper manufacturing process remains relatively simple, requiring only the incorporation step during pulp preparation.
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 nanocellulose-based shaped objects maintain shape integrity and are easily detectable under UV light, enhancing security document authentication while being invisible in reflected light, thus improving counterfeiting detection without affecting the paper's appearance.
Implementation Method 1
The nanocellulose-based shaped objects maintain shape integrity and are easily detectable under UV light
Data Source
AI summary
The present invention disclosed a shaped object comprising nano cellulose alone or a composition of nano cellulose for inclusion in a paper product and process for preparation thereof. The present invention further disclosed a paper product having the shaped objects incorporated therein. The shaped objects are used as a security feature for identifying and authenticating security documents.