Color Changeable Dye for Oxygen Exposure Monitoring
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Solution Overview
Problem
Existing limited or restricted use products, such as medical devices and consumables, risk contamination or spoilage if reused or used beyond recommended times due to lack of effective indicators that accurately signal expiration or tampering, with previous solutions focusing on container conditions rather than product integrity.
Innovation Solution
A color changeable dye is integrated onto the product or packaging, which changes color after exposure to oxygen for a predetermined time, providing a visible warning that the product should no longer be used or has expired, thereby preventing reuse or consumption of compromised items.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If a color changeable indicator is applied to the container of a product, then the container condition can be monitored, but the product integrity and actual usage status cannot be accurately indicated
Solution Approach 1:
The patent merges the indicator with the product itself by incorporating the color changeable dye directly into the product material or applying it to the product surface, rather than placing it on the container. This ensures the indicator experiences the same environmental conditions (oxygen exposure, temperature, moisture) as the product, providing accurate information about the product's actual state and usage status.
Solution Approach 2:
The patent introduces oxygen as an intermediary that triggers the color change. The dye is designed to change color in response to oxygen exposure, which naturally occurs when the product is removed from its sealed packaging and used. This intermediary mechanism provides an automatic, objective indication of product usage status without requiring active monitoring or user intervention.
2Loss of information
If a pH sensitive dye indicator is used to detect atmospheric conditions, then container atmosphere can be monitored, but product-specific condition information is not provided
Solution Approach 1:
The patent changes the detection parameter from pH sensitivity to oxygen sensitivity. The color changeable dye is specifically designed to respond to oxygen concentration changes rather than pH changes. This parameter change allows the indicator to detect oxygen exposure, which directly correlates with product usage status and degradation risk, providing more relevant information for product safety monitoring.
3Reliability
If chlorine gas atmosphere is used for sterilization, then sterilization effect is achieved, but the reactive atmosphere may damage product materials and compounds
Solution Approach 1:
The patent replaces the reactive chlorine gas atmosphere with an inert or controlled atmosphere packaging system. The product is packaged in a way that protects it from harmful reactive gases during storage and transport. The color changeable dye then detects oxygen exposure after package opening, providing a safer alternative that maintains sterilization effectiveness without the damaging effects of reactive chlorine gas on sensitive medical instruments and pharmaceutical compounds.
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 color changeable dye effectively indicates the end of use or expiration of single-use products and the degradation of consumables, preventing contamination and spoilage by ensuring users are aware of the product's condition, thus enhancing safety and quality assurance.
Implementation Method 1
a color changeable dye that changes color after being exposed to oxygen for a predetermined period of time
Data Source
AI summary
An apparatus with time controlled color change indication comprises an apparatus includes a disposable, limited or restricted use product and an oxygen sensing color changeable dye disposed on a portion of the apparatus, the dye being translucent or having a first color upon application and for a defined time thereafter and the dye changing color after exposure to oxygen for the defined time. For example, a packaging for containing a product for human consumption has a portion with a color changeable dye disposed thereon. The dye changes color after being exposed to oxygen for a controlled and predetermined period of time indicating that the product for human consumption should no longer be consume or has decreased in freshness, quality of taste or potency.