Randomly Marked Plastic Authentication via Taggant Distribution
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Solution Overview
Problem
Existing methods for identifying plastic compositions, such as using fluorescent dyes, are prone to errors due to aging or leaching under normal conditions, and uniform distribution is crucial for accurate identification, making non-uniform distributions highly undesirable.
Innovation Solution
The development of randomly marked plastic materials and articles with a taggant distributed non-homogeneously between two plastics with different properties, allowing for unique authentication through detectable markings at specific wavelengths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fluorescent dyes are used for plastic identification, then identification capability is provided, but reliability deteriorates due to aging and leaching under normal conditions
Solution Approach 1:
The patent changes the fundamental parameter of the identification marker from organic fluorescent dyes to inorganic fluorescent particles. This parameter change transforms the material properties to achieve superior stability - inorganic particles do not age or leach like organic dyes, thereby resolving the reliability issue while maintaining identification capability through fluorescent detection
Solution Approach 2:
The patent replaces durable inorganic fluorescent particles with organic fluorescent dyes that have limited lifespan due to aging and leaching. This substitution creates a system that requires periodic replacement or recalibration, reducing long-term reliability despite initial cost advantages
2Measurement precision
If dyes are uniformly distributed in plastic, then accurate identification is enabled, but manufacturing complexity increases to achieve and maintain uniform distribution
Solution Approach 1:
The patent applies homogeneity by uniformly distributing inorganic fluorescent particles throughout the plastic matrix during molding. This uniform distribution ensures consistent fluorescent signal detection across the entire article, enabling accurate identification while the molding process naturally achieves distribution without additional complex steps
Solution Approach 2:
The patent uses local quality by creating non-uniform distributions of fluorescent particles in specific regions or patterns within the plastic article. This allows identification through detection of specific local fluorescent characteristics, reducing the need for perfect overall uniformity while maintaining manufacturing simplicity
3Adaptability or versatility
If additives are added to polymers for identification, then identification capability is provided, but measurement precision deteriorates due to altered fluorescence intensities
Solution Approach 1:
The patent extracts the identification function from polymer additives and places it in separate inorganic fluorescent particles. This separation means that plasticizers, stabilizers, and other necessary polymer additives do not interfere with the fluorescent signal, as the inorganic particles maintain consistent fluorescence intensities independent of polymer composition variations
Solution Approach 2:
The patent introduces inorganic fluorescent particles as an intermediary between the plastic matrix and the identification system. These particles serve as stable fluorescent markers that are not chemically interacted with by polymer additives, thereby maintaining measurement precision while allowing the use of necessary polymer additives for material performance
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 approach enables non-destructive authentication of plastic articles by creating unique, random distributions of markings that are resistant to environmental degradation, enhancing the reliability of identification and preventing counterfeiting.
Implementation Method 1
detectable emission
Data Source
AI summary
Disclosed herein are randomly marked plastic materials and articles, and methods for their fabrication. In one embodiment, a randomly marked article can comprise: a random distribution of markings within a substrate, and machine readable data and/or a data layer capable of comprising machine readable data. The substrate was formed a first plastic and a second plastic, wherein the first plastic and the second plastic comprise a sufficient difference in a property to cause the random distribution. In one embodiment, a method for fabricating an article, comprises: combining a taggant with a first plastic to form a tagged plastic; molding the article from the tagged plastic and a second plastic, wherein the article comprises a random distribution of the taggant; and mapping taggant in the article to form a map.