Laminated Time Tracking Label for Perishable Goods
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Solution Overview
Problem
Existing time tracking systems for perishable goods are inadequate as they fail to provide a clear and simple visual indication of freshness and expiration, often relying on complex structures or dangerous materials, and do not effectively communicate the oxygen transmission rate (OTR) related expiration dates.
Innovation Solution
A laminated time tracking label comprising an oxygen impermeable bottom layer, a reactive color-changing layer that reacts with oxygen, a sacrificial layer to control oxygen exposure, and a top layer that filters out non-oxygen molecules, with an optional UV coating for on-demand manufacturing, allowing for a sudden and clear color change indicating expiration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a time tracking label uses a complex structure with multiple layers and materials to achieve clear visual indication, then the visual clarity and reliability of expiration indication is improved, but the device complexity and manufacturing cost increase
Solution Approach 1:
The label is divided into multiple functional layers: a substrate layer, a sacrificial layer containing oxygen scavenger, and a reactive layer with color-changing indicator. Each layer performs a specific function, allowing the complex reliability requirement to be met through modular design while simplifying manufacturing and material selection for each individual layer.
Solution Approach 2:
The label combines different materials with complementary properties: the sacrificial layer uses oxygen-scavenging materials to control oxygen release, while the reactive layer uses oxygen-sensitive color-changing materials. This composite structure enables reliable visual indication by integrating multiple material functions into a single label system.
2Ease of manufacture
If the label uses a simple structure to reduce manufacturing cost, then the manufacturing expense is reduced, but the ability to provide clear and simple visual indication deteriorates
Solution Approach 1:
By segmenting the label into distinct functional layers, each layer can be manufactured using simple, cost-effective processes. The substrate layer provides structural support, the sacrificial layer controls oxygen release, and the reactive layer provides visual indication. This segmentation allows each component to be optimized for low-cost manufacturing while collectively achieving reliable visual indication.
Solution Approach 2:
The label is designed to be self-regulating through the interaction between the sacrificial and reactive layers. The sacrificial layer automatically controls the rate of oxygen release to the reactive layer, eliminating the need for external control mechanisms, complex electronics, or additional power sources, thereby reducing manufacturing cost while maintaining reliable visual indication.
3Reliability
If the label uses dangerous etching metals to achieve sudden color change, then the color change effectiveness is improved, but the safety and environmental friendliness deteriorates
Solution Approach 1:
The invention converts the potentially harmful effect of rapid oxidation into a beneficial visual signal. The reactive layer is designed to undergo controlled oxidation by oxygen diffusing through the sacrificial layer, producing a sudden and clear color change. This transforms the harmful oxidation process into a useful indication mechanism while avoiding dangerous materials through proper material selection and layer design.
Solution Approach 2:
The label achieves effective color change by controlling the parameters of the oxidation reaction through the sacrificial layer's oxygen-scavenging properties. By adjusting the thickness, composition, and oxygen-scavenging capacity of the sacrificial layer, the rate and timing of oxygen release to the reactive layer can be controlled, producing a sudden color change without requiring dangerous etching metals or extreme reaction conditions.
4Reliability
If the label uses overly complicated structures to prevent misunderstanding, then the clarity of information is improved, but the ease of understanding by the public deteriorates
Solution Approach 1:
The label uses a simple, intuitive color-changing indicator in the reactive layer that transitions from one color to another as oxidation progresses. This visual color change provides immediate and unambiguous information about the freshness or expiration status of the product, eliminating the need for complex displays, text, or interpretation by the user. The color change itself serves as the clear, simple visual indication.
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 label provides a clear and user-friendly visual indication of the expiration date based on oxygen transmission rate, improving public awareness and reducing manufacturing costs while maintaining an elegant design for premium sales.
Implementation Method 1
a sacrificial layer (3) designed to scavenge oxygen therefore determining the amount of oxygen exposure
Implementation Method 2
a reactive color changing layer (2) containing a reactive mixture that suddenly changes color when it gets in contact with oxygen
Implementation Method 3
a top layer (4) also referred as smart or gate layer designed to filter out molecules other than oxygen
Data Source
AI summary
The present invention relates generally to the field of registers (class 235) and more specifically relates to a laminated time tracking device system (subclass 488) and the method to make it. The invention is a novel label designed in different layers (laminated) to keep track of time. The inventor commonly refers to the apparatus for preventing objects from falling into a ridge hole as the: “Time Label “T-Label”. The T-Label disclosed in the instant application addresses the problem of communicating to a user an effective expiration date of a perishable good by providing a laminated structure comprising a bottom layer, a reactive layer, a sacrificial layer, a top layer, and a protecting layer; all assembled together. One of the novel aspects of the time tracking label disclosed in the present application is that it tracks the shelf life of a perishable good by looking at the Oxygen Transmission Rate (OTR) of the specific medium in which is stored thus providing a specific signal if a good has been oxidized rather than a “conventional” not verifiable expiration date.